KR20070017272A - Method for allocation downlink resource in a wideband wireless access communication system - Google Patents

Abstract

The present invention relates to a broadband wireless access communication system in which a downlink frame divided into time and frequency resources exists, the downlink frame includes a data burst allocation area, and a data burst having a priority to be transmitted to a mobile station exists. In the resource allocation method for data burst transmission, the data burst allocation area is divided into at least one sub data burst area, and the sub data burst area is configured to perform power amplification according to a preset power level. A process of constructing a frame, allocating the data burst to a particular sub data burst area of the sub data burst area according to a predetermined criterion, and allocating due to use of all time and frequency resources of the specific sub data burst area Ha If there is an unsuccessful data burst, determining whether there is at least one other sub data burst region for which resource allocation is possible, and if there is, considering the priority of the unassigned data burst in the other sub data burst region, It includes the process of assigning.

Resource Allocation, Downlink Frame, Data Burst, MAP

Description

METHODS FOR ALLOCATION DOWNLINK RESOURCE IN A WIDEBAND WIRELESS ACCESS COMMUNICATION SYSTEM}

1 is a diagram illustrating a downlink frame structure of a broadband wireless access communication system according to an embodiment of the present invention.

2 is a flowchart illustrating a resource allocation process in a broadband wireless access communication system according to an embodiment of the present invention.

3 is a diagram illustrating data burst allocation in a data burst region divided into a plurality of regions in a broadband wireless access communication system according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a data burst allocation process when using a Normal MAP in a broadband wireless access communication system according to an embodiment of the present invention.

5 is a flowchart illustrating a data burst allocation process when using New DL (normal) MAP and H-ARQ MAP in a broadband wireless access communication system according to an embodiment of the present invention.

6A to 6C are flowcharts illustrating an improved data burst allocation process in a broadband wireless access communication system according to a second embodiment of the present invention.

7A through 7C are flowcharts illustrating an improved allocation process for data bursts having a full buffer model in a broadband wireless access communication system according to a second embodiment of the present invention.

8 is a diagram illustrating an example of changing a frame structure in a broadband wireless access communication system according to a second embodiment of the present invention.

9 is a flowchart illustrating a process of changing a frame structure and changing allocation of data bursts by a base station in a broadband wireless access communication system according to a second embodiment of the present invention.

The present invention relates to a broadband wireless access communication system, and more particularly, to a method for allocating downlink resources in a broadband wireless access communication system.

In the 4th Generation (hereinafter, referred to as '4G') communication system, users of services having various quality of service (hereinafter referred to as 'QoS') having a transmission rate of about 100 Mbps are used. Active research is underway to provide them. In particular, current 4G communication systems are broadband wireless, such as wireless local area network (hereinafter referred to as "LAN") systems and wireless metropolitan area network (hereinafter referred to as "MAN") systems. Researches are being actively conducted to support high-speed services in a form of guaranteeing mobility and quality of service (BoS) communication systems in a wideband wireless access (BWA) communication system. Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system.

The IEEE 802.16 communication system is referred to as Orthogonal Frequency Division Multiplexing (OFDM) to support a broadband transmission network on a physical channel of the wireless MAN system. / Orthogonal Frequency Division Multiple Access (OFDMA) is a communication system to which the scheme is applied. The OFDM or OFDMA scheme maintains orthogonality among a plurality of sub-carriers and transmits the optimal transmission efficiency in high-speed data transmission. It is strong in fading (multi-path fading), so it is possible to obtain optimal transmission efficiency in high-speed data transmission. In addition, in the OFDM / OFDMA scheme, the frequency spectrum is superimposed so that frequency use is efficient, frequency selective fading, multipath fading is strong, and inter-symbol interference using a guard interval (ISI: Inter Symbol). Interference) can be reduced, and it is possible to simply design the equalizer structure in hardware. A communication system using the OFDM or OFDMA scheme is WiBro, which is a portable Internet service in the 2.3 GHz band.

On the other hand, in the communication system using the OFDMA scheme, in order to increase channel utilization between a plurality of mobile stations located in one cell and a base station, resources must be properly distributed and used. One of the resources that can be shared in a communication system using the OFDMA scheme becomes a subcarrier, channelizes the subcarriers, and assigns a subcarrier in a predetermined manner to mobile stations in a cell. Guaranteed utilization Here, the set of at least one subcarrier is a subchannel.

Data transmission of the broadband wireless access communication system is divided into frame units, and each frame is divided into a section capable of transmitting downlink data and a section capable of transmitting uplink data. The uplink and downlink data sections are divided into a frequency axis and a time axis. Each element divided into a two-dimensional array of the frequency axis and the time axis is called a slot.

Accordingly, the base station uses normal MAP, new normal MAP, or H-ARQ (hybrid retransmission scheme) MAPs for downlink data burst allocation of the mobile station. The data bursts are allocated to the downlink data interval by occupying a plurality of time slots. In the broadband wireless access communication system standard, power boosting or power deboosting can be performed on data bursts allocated to the base station, thereby increasing downlink resource utilization. The broadband wireless access communication system standard defines the power boosting or deboosting level as {-12, -9, -6, -3, 0, 3, 6, 9, 12} dB.

However, the broadband wireless access communication system standard does not propose a specific method for allocating the data burst to the data burst region. Thus, the availability and efficiency of resources can vary greatly depending on how data bursts are allocated and operated within the domain.

The present invention was devised to solve the above problems, and an object of the present invention is to provide a method for efficiently allocating downlink data bursts in order to maximize resource utilization in a broadband wireless access communication system.

The first method of the present invention for achieving the above objects; In a broadband wireless access communication system in which a downlink frame divided into time and frequency resources exists, the downlink frame includes a data burst allocation region and a data burst having a priority to be transmitted to a mobile station exists. A method for allocating a resource according to claim 1, wherein the data burst allocation region is divided into at least one sub data burst region, and the sub data burst region is configured to configure the downlink frame such that power amplification is performed according to a preset power level. And allocating the data burst to a specific sub data burst area of the sub data burst area according to a predetermined criterion, and to data burst not allocated due to the use of all time and frequency resources of the specific sub data burst area. If present, determining whether there is at least one other sub data burst region that can be allocated to the resource, and if present, assigning the other sub data burst region in consideration of the priority of the unassigned data burst. It is characterized by including.

The second method of the present invention for achieving the above objects; There is a downlink frame divided into time and frequency resources, and the downlink frame includes a MAP region and a data burst allocation region including general broadcast information, and a broadband radio having a data burst having a priority to be transmitted to a mobile station. In an access communication system, a resource allocation method for data burst transmission, wherein the data burst allocation area is divided into at least one sub data burst area, and the sub data burst area performs power amplification according to a preset power level. Configuring the downlink frame to include a group divided into at least one sub-channel unit, assigning the data burst to a specific sub data burst region among the sub data burst regions according to a predetermined criterion; Above specific If there are slots to occupy the entire data burst in a sub data burst region, selecting a group having a minimum number of slots remaining after being occupied by the data burst; assigning a data burst to the selected group; Determining whether there is at least one other sub data burst region that can be allocated when there is a data burst that cannot be allocated due to the use of all time and frequency resources of the specific sub data burst region; And allocating the other sub data burst area in consideration of the priority of the data burst which has not been allocated.

The third method of the present invention for achieving the above objects; In a broadband wireless access communication system in which a downlink frame divided into time and frequency resources exists, the downlink frame includes a data burst allocation region and a data burst having a priority to be transmitted to a mobile station exists. A method for allocating a resource according to claim 1, wherein the data burst allocation region is divided into at least one sub data burst region, and the sub data burst region is configured to configure the downlink frame such that power amplification is performed according to a preset power level. And allocating the data burst to a specific sub data burst area of the sub data burst area according to a predetermined criterion, and to data burst not allocated due to the use of all time and frequency resources of the specific sub data burst area. And if the data burst is to be allocated to one entire sub data burst area, determining whether there is at least one other sub data burst area to which resource allocation is possible, and if present, to the other sub data burst area. And allocating in consideration of the priority of the data burst which has not been allocated.

A fourth method of the present invention for achieving the above objects; There is a downlink frame divided into time and frequency resources, and the downlink frame includes a data burst allocation region, and in a broadband wireless access communication system in which there is a data burst to be transmitted to a mobile station, resource allocation for the data burst transmission The data burst allocation region may be divided into at least one sub data burst region, and the sub data burst region may be configured to configure the downlink frame such that power amplification is performed according to a preset power level. Allocating a data burst to the sub data burst region according to a predetermined criterion; determining whether at least one sub data burst region capable of resource allocation exists; and if present, a sub data burst region capable of allocating the resource. Time Reconstructing the downlink frame such that a frequency resource is a time and frequency resource of a sub data burst region to which a data burst is allocated, and changing and allocating a data burst previously assigned to the reconstructed downlink frame. It is characterized by.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation of the present invention will be described, and other background art will be omitted so as not to distract from the gist of the present invention.

The present invention proposes a method for efficiently allocating downlink data bursts to a predetermined downlink frame in a broadband wireless access communication system. The predetermined downlink frame is divided into a preamble region, a MAP region, and a data burst allocation region, and the data burst allocation region is a data burst allocation that does not apply power boosting or deboosting. It may be configured as an area, or may include at least one sub data burst area to which power boosting or de boosting is applied. In the following embodiments, the present invention will be divided into two or three sub data burst regions, but it should be noted that the data burst region of the present invention may have at least one sub data burst region.

In the first embodiment of the present invention, a method of dividing a data burst allocation region of a downlink frame into a power boosting or deboosting region and allocating data bursts to the divided data burst allocation region will be described. In the second embodiment of the present invention, a method of improving resource utilization by further improving the first embodiment will be described.

1 is a diagram illustrating a downlink frame structure of a broadband wireless access communication system according to embodiments of the present invention.

Referring to FIG. 1, the downlink frame is divided into a preamble region 102, a MAP region 104, and a data burst allocation region 106. The preamble area 102 includes a preamble for synchronization acquisition, and the MAP area 104 includes DL-MAP and UL-MAP including broadcast data information commonly received by mobile stations. The data burst assignment area 106 is then assigned downlink data bursts transmitted to mobile stations. Information about the location and allocation of the downlink data bursts is included in the DL-MAP of the MAP region 104.

In the data burst allocation region 106, the horizontal axis is divided into symbols on the time axis, and the vertical axis is divided on the frequency. The data burst allocation region 106 divided into symbols and frequency is divided into sub data burst allocation regions 108 to 112 to which power boosting or deboosting is applied. In FIG. 1, for example, the data burst allocation region 106 is divided into three sub data burst regions, namely, region # 1 (108), region # 2 (110), and region # 3 (112). Data bursts allocated to the region # 1 (108) region perform 3 dB power boosting, data bursts allocated to the region # 2 (110) region perform 0 dB power boosting, and region # 3 (112) region Allocated data bursts perform a -3dB power boost. Of course, the data burst region may be divided into at least one sub data burst regions. That is, in the related art, power boosting or deboosting is performed for each data burst, whereas in the present invention, an area to which data bursts are allocated is previously classified, and a separate power boosting or power deboosting is performed for each of the divided areas. Perform.

Then, the data burst region is divided into two sub-data burst regions (ie, 3 dB power boosting region, -3 dB power boosting region) or three (ie, 3 dB power boosting region, 0 dB power boosting region, and -3 dB power boosting region). The full usage subchannel (hereinafter referred to as "FUSC") and the partial usage subchannel (hereinafter referred to as "PUSC") are divided into divided regions. In this case, the number of subchannels showing the optimal performance effect will be estimated.

* (3dB, -3dB) division method

First, it is assumed that the number of subchannels boosting 3dB power is x and the number of subchannels boosting −3dB power is y.

In the case of FUSC, a total of 16 subchannels are formed, and Equation 1 is established according to a maximum transmit power condition per symbol.

When the division scheme in which all subchannels are used while satisfying Equation 1 is expressed as a set, {(1, 15), (2, 14), (3, 13), (4, 12), (5, 11)}. That is, the entire data burst allocation region is divided into a 3 dB power boosting region and a -3 dB power boosting region, and the 3 dB power boosting region includes 1 or 2 or 3 or 4 or 5 subchannels, and the -3 dB power The boosting region may be configured to include 15 or 14 or 13 or 12 or 11 subchannels. Here, the (5, 11) subchannel division scheme is the most preferred division scheme because it can have a maximum power for each symbol.

In the case of PUSC, a total of 30 subchannels are formed, and Equation 2 is established according to a maximum transmit power condition per symbol.

When a division scheme that can use all subchannels while satisfying Equation 2 is expressed as a set, {(1, 29), (2, 28), (3, 27), (4, 26), (5, 25), (6, 24), (7, 23), (8, 22), (9, 21), (10, 20)}. Here, the (10, 20) subchannel division scheme is the most preferred division scheme because it can have a maximum power for each symbol.

* (3dB, 0dB, -3dB) division method

Compared to the (3dB, -3dB) partitioning scheme, the (3dB, 0dB, -3dB) partitioning scheme is more active with respect to the carrier to interference and noise ratio (CINR) distribution of mobile stations. There is an advantage to cope with.

Then, it is assumed that the number of subchannels for 3dB power boosting is x, the number of subchannels for 0dB power boosting is y, and the number of subchannels for -3dB power boosting is z.

In the case of FUSC, a total of 16 subchannels are formed, and Equation 3 is established according to a maximum transmit power condition per symbol.

All sub-channels are used among the natural solutions of (x, y, z) satisfying Equation 3 above, and the condition that the maximum power can be allocated is an equal sign. In addition, the condition of z = 2x by -3dB power boosting compared to 3dB power boosting should be satisfied. Therefore, Equation 3 may be expressed as Equation 4 below.

Accordingly, the set of (x, y, z) satisfying the above Equation 4 and z = 2x condition is {(1, 13, 2), (2, 10, 4), (3, 7, 6), ( 4, 4, 8), (5, 1, 10)}. Here, the (3, 7, 6) or (4, 4, 8) subchannel partitioning scheme is the most preferred partitioning scheme in consideration of the CINR distribution of the mobile station.

In the case of the PUSC, a total of 30 subchannels are formed, and Equation 5 is established according to a maximum transmit power condition per symbol.

While satisfying Equation 5, all sub-channels are used among the natural solutions of (x, y, z), and the condition that the maximum power can be allocated is an equal sign. In addition, the condition of z = 2x by -3dB power boosting compared to 3dB power boosting should be satisfied. Therefore, Equation 5 may be expressed as Equation 6 below.

Accordingly, the set of (x, y, z) satisfying the above Equation 6 and z = 2x condition is {(1, 27, 2), (2, 24, 4), (3, 21, 6), ( 4, 18, 8), (5, 15, 10), (6, 12, 12), (7, 9, 14), (8, 6, 16), (9, 3, 8)}. Here, (6, 12, 12) or (7, 9, 14) is the most preferred combination when considering the CINR distribution of the mobile station.

2 is a flowchart illustrating a resource allocation process in a broadband wireless access communication system according to embodiments of the present invention.

Prior to the description of FIG. 2, the data burst can be divided into an integer number of slots, and when performing the two-dimensional allocation according to the frequency and time, the data burst should be considered so that no slots are wasted in the downlink frame. The downlink frame is divided into a frequency axis and a symbol axis (time axis), and there are a plurality of slots considering both frequency and time.

Referring to FIG. 2, in step 202, the base station performs queue scheduling to determine priority of connection for data bursts to be transmitted for each service class, and proceeds to step 204. In step 204, the base station determines how to split the data burst allocation region 106 of the downlink frame, selects a frame structure corresponding thereto, and proceeds to step 206. Here, the frame structure may have a predetermined and fixed form or may have a variable form according to characteristics of data bursts to be transmitted. In addition, as shown in FIG. 1, the data burst region may have a frame structure divided into a plurality of sub data burst regions.

In step 206, the base station estimates the required MAP overhead for the data bursts to be transmitted, determines the MAP size, and proceeds to step 208. Here, the MAP size should be set large when there are many data bursts to be transmitted. However, if the MAP size is set large, the data burst area size is reduced accordingly. Therefore, the MAP size and data burst area size must be properly determined as a trade-off.

In step 208, the base station configures one data burst having the same data burst or modulation and coding scheme (MCS) level transmitted to the same mobile station to minimize MAP overhead. In step 210, data burst control is performed. The MCS is a combination of modulation schemes and coding schemes, and may define a plurality of MCSs from level 1 to level N according to the number of MCSs.

In step 210, the base station allocates data bursts input according to transmission priority to a specific sub data burst area of the data burst area of the downlink frame according to a predetermined rule, and proceeds to step 212. The predetermined rule will be described in more detail with reference to FIGS. 3 to 5.

In step 212, the base station repeats step 210 in step 206 to determine a frame having the best resource utilization among the frame structures according to the allocated data burst as an optimal frame structure. Here, in order to reduce the complexity of the implementation, one frame structure may be taken in step 204, and then step 212 may be omitted.

3 is a diagram illustrating data burst allocation in a data burst region divided into a plurality of regions in a broadband wireless access communication system according to embodiments of the present invention.

Referring to FIG. 3, first, the data burst region is divided into three sub-data bursts: a boosting region 302, a normal region 304, and a deboosting region 306. It is divided into areas.

If the CINR value of the data burst to be allocated is smaller than the first threshold 310, it is assigned to the boosting region 302, and if greater than the second threshold, it is assigned to the deboosting region 306. In addition, a value larger than the first threshold and smaller than the second threshold is assigned to the normal region 304. Here, the CINR value of the data burst is a measure of the channel state between the mobile station and the base station fed back by the mobile station at a previous time, and is a value used to actually determine the MCS level. The base station may transmit the data burst using the most robust modulation and encoding scheme in the case of transmission of the first data burst in which the CINR value fed back by the mobile station does not exist. If there is no change in the MCS level after -3 dB power boost among the data bursts allocated to the normal region 304, it is reassigned to the deboosting region 306. That is, the data burst reassigned to the deboosting region 306 has the same frequency efficiency as before performing the MCS level change even though the -3dB power boosting is performed. have.

Similarly, even if 3 dB power boosting is performed among the data bursts allocated to the boosting region 302, if there is no change in the MCS level, the normal region 304 is reassigned. That is, even if the data burst reassigned to the normal region 304 has the same frequency efficiency as before the execution without changing the MCS level even when performing 3dB power boosting, this also minimizes the extra power to increase the overall power efficiency. There is.

* Data burst allocation when using Normal MAP

In the present invention, when the normal MAP is used, the sub data burst region may be divided into a plurality of sub data burst regions or groups for data burst allocation. The groups are divided into forms having one or more subchannels in each region. The subchannels have a structure including at least one slot which is separated by time. In addition, the group may be divided into a single group and a composite group, where a single group is a set of at least one subchannel, and the composite group has a structure in which two or more single groups are combined. Each of the sub data burst regions may exist in any one of the single group and the composite group, or both groups.

4 is a flowchart illustrating a data burst allocation process when normal MAP is used in a broadband wireless access communication system according to a first embodiment of the present invention.

Referring to FIG. 4, in step 402, the base station proceeds to step 404 if there is a data burst to be allocated to the data burst region. In step 404, the base station allocates a sub data burst region to which the data burst is allocated in a predetermined frame structure, and proceeds to step 406. Here, it is assumed that the frame structure has the form as shown in FIG. Accordingly, the base station determines a data burst allocation to any one of the sub data burst regions. The process of determining the sub data burst region is as shown in FIG. 3.

In step 406, the base station calculates the number of slots of the data burst to determine whether all of the data bursts can be allocated to the sub data burst region, and proceeds to step 408. In step 408, the base station proceeds to step 410 when the calculated number of data burst slots can be allocated to the corresponding sub data burst region, and otherwise proceeds to step 414. If the number of subchannels in the sub data burst region is 10, for example, as shown in Table 1, it may be divided into three single groups and two complex groups. That is, the sub data burst region includes a single group # 1 of three subchannels, a single group # 2 of three subchannels, a single group # 3 of four subchannels, and a single group # 2 and # 3 in a subchannel 7 It is possible to configure a composite group # 1 consisting of two groups and a single group # 1, # 2 and # 3 together to form a composite group # 2 consisting of ten subchannels. Table 1 below shows a method for configuring a single group and a composite group according to the number of subchannels in each sub data burst region.

For example, if the number of slots of data bursts to be transmitted is 14, only a single group is allocated. Since a single group # 1 or # 2 can be allocated 15 slots in total, 5 slots per subchannel for 3 symbol intervals. It can have a null padded slot. However, since 14 slots can be allocated to each group 2 during 2 symbol intervals, complex slot # 1 can be assigned exactly 14 slots to the corresponding data burst, and the number of null padded slots becomes 0. Minimize waste. Therefore, the reason for dividing into multiple single groups and complex groups is to minimize the waste of resources by assigning null padded slots to 0 when allocating all possible data bursts to each group. However, because too many combinations of single or complex groups result in implementation complexity, the number of combinations of each group should be set to a reasonable number that can be implemented.

In step 410, the base station selects a group having the smallest number of null padded slots in a single group or a composite group and proceeds to step 412. The null padded slot means a slot that remains after allocating data bursts to be transmitted. Therefore, when a lot of null padded slots remain, this means that a lot of meaningless information is transmitted.

In step 412, the base station determines whether two or more groups having the same number of null padded slots exist. As a result of the determination, if more than one exists, step 420 is performed, and if only one exists, step 422 is performed.

In step 414, the base station determines whether the data burst is fragmentable. If the partition is possible, the process proceeds to step 416. If the partition is not possible, the process proceeds to a data burst allocation failure and the process proceeds to step 402. In step 416, the base station divides the data burst by the number of slots allocable to the sub data burst area and proceeds to step 418. In step 418, the base station determines whether two or more groups having the largest number of assignable slots exist. If more than one group exists, go to step 420; otherwise, go to step 422.

In step 420, since the base station has two or more selected groups, the base station selects a group having a larger number of subchannels as a data burst allocation group and proceeds to step 422. In step 422, the base station determines whether the selected group is a composite group. As a result of the determination, if it is a composite group, the process proceeds to step 424;

In step 424, if there are data bursts previously assigned to the corresponding composite group, the base station shifts them, allocates the data bursts, and proceeds to step 428. If a new data burst is allocated to an allocable complex group region without shifting the data burst allocated to the existing composite group, a space slot may occur between the existing data bursts and the newly allocated data burst, thereby efficiently utilizing resources. Data burst allocation scheduling becomes difficult. In step 426, the base station allocates a data burst slot to the corresponding group, that is, selected single group slots, and proceeds to step 428. In step 428, the base station calculates MAP overhead according to the completion of data burst allocation and proceeds to step 430. The MAP overhead calculation is for determining whether the next data burst can be allocated to the data burst area according to the size of the MAP area. In step 430, if the remaining area to be allocated to the data burst region remains, the base station performs the process again from step 402, and if not, ends the data burst allocation.

* Data burst allocation when using New DL (normal) MAP or H-ARQ MAP

In case of allocating a data burst using New DL MAP or H-ARQ MAP, after determining a sub data burst region to which the data burst is allocated, one-dimensional slot allocation is performed on the frequency axis. After slot allocation is completed on the frequency axis, slot allocation is performed on the frequency axis of the next symbol if there is a data burst to be allocated. This slot allocation method is based on the IEEE 802.16 standard document. Here, the New DL MAP is a MAP that can be used regardless of whether the mobile station supports the H-ARQ scheme. Therefore, when allocating a data burst using the New DL MAP or the H-ARQ MAP, unlike a case of allocating a data burst using the Normal MAP, a single group or a complex group is not required.

FIG. 5 is a flowchart illustrating a data burst allocation process when using New DL MAP or H-ARQ MAP in a broadband wireless access communication system according to a first embodiment of the present invention.

Referring to FIG. 5, in step 502, the base station determines whether there is a data burst to be allocated to the H-ARQ MAP received from the higher layer, and if so, proceeds to step 504. In step 504, the base station allocates a sub data burst region to which the data burst is allocated and proceeds to step 506. The process of determining the sub data burst region is as described with reference to FIG. 3.

In step 506, the base station calculates the number of slots of the data burst to determine whether all of the data bursts can be allocated to the sub data burst region, and proceeds to step 508. In step 508, the base station proceeds to step 510 when the calculated number of data burst slots can be allocated to the corresponding sub data burst area. Otherwise, the base station proceeds to step 516.

In step 510, the base station allocates the data burst to a corresponding sub data burst region and proceeds to step 512. In step 512, the base station calculates MAP overhead and proceeds to step 514. The MAP overhead calculation is for determining whether the next data burst can be allocated to the data burst area according to the size of the MAP area. In step 514, if the slot to allocate another data burst remains in the corresponding sub data burst region, the base station returns to step 502 and repeats the above steps.

In step 516, the base station determines whether the data burst to be allocated is splittable. As a result of the determination, if the data segment is burstable, the process proceeds to step 518. If not, the process proceeds to step 502. In step 518, the base station divides the data burst by the number of slots that can be allocated. For example, if the number of slots that can be allocated to the sub data burst area is eight and the number of slots to be occupied by the splittable data burst is ten, the data burst is divided and allocated to eight slots first, and the remaining two at the time of the next downlink frame transmission The data burst corresponding to the one slot is allocated.

6A through 6C are flowcharts illustrating an improved data burst allocation process in a broadband wireless access communication system according to a second embodiment of the present invention.

Prior to the description of FIGS. 6A to 6C, when the first embodiment does not satisfy a condition for allocating a data burst region, the data burst may not be allocated to the sub data burst region. Therefore, when the number of mobile stations belonging to one base station is small, there may be at least one or more unassigned data burst regions. This means wasting resources.

Therefore, in order to maximize resource utilization, the second embodiment of the present invention describes a method of allocating or reallocating data bursts that are not allocated because they do not satisfy the resource allocation condition of the data bursts to an empty sub data burst region. do. Note that the second embodiment is performed after the resource allocation according to the first embodiment is finished, and is performed when data burst allocation information can be allocated to the MAP region.

First, referring to FIG. 6A, in step 602, the base station determines whether an empty sub data burst region exists. As a result of the determination, if there is an empty sub data burst region, the process proceeds to step 606. If the empty sub data burst region does not exist, resource allocation for the data burst is terminated.

In step 606, the base station determines whether there is one empty sub data burst region. As a result of the determination, if there is one empty sub data burst region, the process proceeds to step 608, and if two, the process proceeds to step 618 of FIG. 6B.

In step 608, the base station determines whether the empty sub data burst region is a boosting region BR or a normal region NR. As a result of the determination, the process proceeds to step 610 in the case of the boosting area or the normal area, and proceeds to step 612 if the boosting area or the normal area is not the boosting area. In step 610, the base station allocates the empty sub data burst area, that is, the boosting area or the normal area, in consideration of the priority of the data burst to be allocated and proceeds to step 646 of FIG. 6C. In this case, the priority of the data burst is an Unsolicited Granted Service (UGS), a RealTime Polling Service (rtPS), an Extended RealTime Polling Service (ertPS), a non-real-time polling service ( It has priority in order of nrtPS: Non RealTime Polling Service (BE), and Best Effort Service (BE). Accordingly, the base station sequentially sorts the data bursts from the highest priority before allocating the data burst to the sub data burst region.

In step 612, the base station determines whether only the deboosting area is empty and the data burst left because the data burst allocation condition is not satisfied in the first embodiment should be allocated to the boosting area. As a result of the determination, the base station recognizing that the remaining data burst should have been allocated to the boosting region according to the first embodiment proceeds to step 614. Otherwise, the base station recognizing that it should have been allocated to the normal area proceeds to step 616. In step 616, the base station allocates the de-boosting region in order of data bursts having the highest priority. In step 614, the base station allocates the data burst to the deboosting area in consideration of priority. However, the base station should consider that there is a problem in that no MCS level can be applied when a data burst having a minimum MCS level (for example, QPSK modulation scheme, 1/12 coding rate) is allocated to the deboosting area. . Accordingly, the data burst having the minimum MCS level is allocated to the next downlink frame interval without being allocated to the de boosting region.

Referring to FIG. 6B, in step 618, the base station allocates data bursts in order of boosting region, normal region, and deboosting region among the two sub data burst regions. First, the base station determines whether the boosting region and the normal region are empty so that data bursts can be allocated to the two regions. If it is determined that the sub data burst regions corresponding to the boosting region and the normal region are empty and a data burst can be allocated, the operation proceeds to step 626, and if it is impossible to assign the data burst to the boosting region and the normal region, the operation proceeds to step 620. .

In step 626, the base station first determines whether a data burst can be allocated to the boosting region. As a result of the determination, the process proceeds to step 628 if it is possible to assign, and proceeds to step 630 if it cannot be assigned. In step 628, the base station allocates a data burst in consideration of the priority to the boosting area and proceeds to step 646 of FIG. 6C. In step 630, the base station allocates the data burst in consideration of the priority to the normal area and proceeds to step 646 of FIG. 6C.

In step 620, the base station determines whether the empty sub data burst region is a boosting region and a deboosting region. As a result of the determination, if data bursts are allocated to the boosting area and the deboosting area, the process proceeds to step 632;

In step 632, the base station determines whether data burst allocation is possible in the boosting region. As a result of the determination, if it is possible to assign a data burst to the boosting region, the process proceeds to step 634, and if impossible, the process proceeds to step 636. In step 634, the base station allocates the data burst to the boosting area in consideration of the priority of the data burst. In step 636, the base station allocates the data burst to the deboosting area in consideration of the priority of the data burst.

Meanwhile, in step 622, the base station determines whether data burst allocation is possible in the normal region because the empty sub data burst regions are the normal region and the deboosting region. As a result of the determination, if data burst allocation is possible in the normal region, the flow proceeds to step 624, and if data burst allocation is possible in the deboosting region, the flow proceeds to step 638. In step 624, the base station first allocates the data burst to the normal area in consideration of the priority of the data burst and proceeds to step 646 of FIG. 6C. In step 638, the base station allocates the data burst except for the data burst corresponding to the minimum MCS level to the deboosting region in consideration of priority.

Referring to FIG. 6C, in step 646, the base station calculates the number of slots of the data burst to determine whether all of the data bursts can be allocated to the sub data burst area after completing allocation of the sub data burst area of the data burst. Proceed to step 648. In step 648, the base station proceeds to step 650 if the calculated number of data burst slots can be allocated to the corresponding sub data burst region, and otherwise proceeds to step 654.

In step 650, the base station selects a group having the smallest number of null padded slots among the single group or the composite group and proceeds to step 652. The null padded slot means a slot that remains after allocating data bursts to be transmitted.

In step 652, the base station determines whether two or more groups having the same number of null padded slots exist. As a result of determination, if more than one exists, step 660 is performed, and if only one exists, step 662 is performed.

In step 654, the base station determines whether data bursts can be divided. If partitioning is possible, the process proceeds to step 656. If partitioning is not possible, the data burst allocation fails. In step 656, the base station divides the data burst by the number of slots allocable to the sub data burst region and proceeds to step 658. In step 658, the base station determines whether two or more groups having the largest number of assignable slots exist. If more than one group exists, go to step 660; otherwise, go to step 662.

In step 660, since the base station has two or more selected groups, the base station selects a group having a larger number of subchannels as a data burst allocation group and proceeds to step 662. In step 662, the base station determines whether the selected group is a composite group. As a result of the determination, if it is a composite group, the process proceeds to step 664, and if it is a single group, the process proceeds to step 666.

In step 664, if there are data bursts previously assigned to the corresponding composite group, the base station shifts them, allocates the data bursts, and proceeds to step 668. If a new data burst is allocated to an allocable complex group region without shifting the data burst allocated to the existing composite group, a space slot may occur between the existing data bursts and the newly allocated data burst, thereby efficiently utilizing resources. Data burst allocation scheduling becomes difficult. In step 666, the base station allocates a data burst slot to the corresponding group, that is, selected single group slots, and proceeds to step 668.

In step 668, the base station calculates MAP overhead according to completion of data burst allocation and proceeds to step 670. The MAP overhead calculation is for determining whether the next data burst can be allocated to the data burst area according to the size of the MAP area. In step 670, if the remaining area to be allocated to the data burst area remains, the base station performs the operation again from step 602 of FIG. 6A, and if not, ends the data burst allocation.

7A to 7C are flowcharts illustrating an improved allocation process for data bursts having a full buffer model in a broadband wireless access communication system according to a second embodiment of the present invention.

Prior to the description of FIGS. 7A to 7C, only one data burst should be allocated to one sub data burst region for a data burst having a full buffer model. That is, a data burst having the full buffer model requires a resource amount corresponding to one sub data burst area or more.

First, referring to FIG. 7A, in step 702, the base station determines whether an empty sub data burst region exists. As a result of the determination, if there is an empty sub data burst region, the process proceeds to step 706. If the empty sub data burst region does not exist, resource allocation for the data burst is terminated.

In step 706, the base station determines whether there is one empty sub data burst region. As a result of the determination, if there is one empty sub data burst region, the process proceeds to step 708, and if two, the process proceeds to step 718 of FIG. 7B.

In step 708, the base station determines whether the empty sub data burst region is the boosting region BR or the normal region NR. As a result of the determination, the process proceeds to step 710 in the case of the boosting area or the normal area, and proceeds to step 712 if the boosting area or the normal area is not the boosting area. In step 710, the base station allocates the empty sub data burst area, that is, the boosting area or the normal area, in consideration of the priority of the data burst to be allocated, and proceeds to step 746 of FIG. 7C.

In step 712, the base station determines whether only the de boosting area is empty, and the data burst left because the data burst allocation condition is not satisfied in the first embodiment should be allocated to the boosting area. As a result of the determination, the base station recognizing that the remaining data burst should have been allocated to the boosting region according to the first embodiment proceeds to step 714. Otherwise, the base station recognizing that it should have been allocated to the normal area proceeds to step 716. In step 716, the base station allocates the deboosting region in order of data burst having the highest priority. In step 714, the base station allocates the data burst to the deboosting area in consideration of priority. However, the base station should consider that there is a problem in that no MCS level can be applied when a data burst having a minimum MCS level (for example, QPSK modulation scheme, 1/12 coding rate) is allocated to the deboosting area. . Accordingly, the data burst having the minimum MCS level is allocated to the next downlink frame interval without being allocated to the de boosting region.

Referring to FIG. 7B, since the base station has two empty sub data burst regions in operation 718, the base station attempts to allocate data bursts in order of a boosting region, a normal region, and a deboosting region among the two sub data burst regions. First, the base station determines whether the boosting region and the normal region are empty so that data bursts can be allocated to the two regions. As a result of the determination, if the sub data burst regions corresponding to the boosting region and the normal region are empty and a data burst can be allocated, the operation proceeds to step 726. If it is impossible to assign the data burst to the boosting region and the normal region, the operation proceeds to step 720. .

In step 726, the base station compares whether the MCS levels of the upper two data bursts among the data bursts sorted by priority are the same. As a result of the comparison, if the MCS level is the same, the process proceeds to step 728, and if it is not the same, proceeds to step 730. In step 728, the base station allocates the high priority data burst to the boosting area and the low priority data burst to the normal area, and proceeds to step 746 of FIG. 7C. In step 730, the base station allocates a data burst with a high MCS level to a normal area and a data burst with a low MCS level to a boosting area, and proceeds to step 746 of FIG. 7C.

In step 720, the base station determines whether the empty sub data burst region is a boosting region and a deboosting region. As a result of the determination, when data bursts are allocated to the boosting area and the deboosting area, the process proceeds to step 732.

In step 732, the base station compares whether the MCS levels of the upper two data bursts among the data bursts sorted by priority are the same. As a result of the comparison, if the MCS level is the same, the process proceeds to step 734, and if not, the process proceeds to step 736.

In step 734, the base station allocates a data burst having a higher priority to a boosting region and a data burst having a lower priority to a deboosting region. In step 736, the base station allocates a data burst with a high MCS level to a boosting area and a data burst with a low MCS level to a boosting area, and proceeds to step 746 of FIG. 7C.

In step 722, the base station compares whether the base station compares the MCS levels of the upper two data bursts among the data bursts sorted by priority. As a result of the comparison, if the MCS level is the same, the process proceeds to step 724, and if it is not the same, proceeds to step 738.

In step 724, the base station allocates a data burst having a higher priority to a normal region and a data burst having a lower priority to a deboosting region and proceeds to step 746 of FIG. 7C. Here, the base station does not allocate a data burst to the deboosting area at the minimum MCS level. In step 738, the base station allocates a data burst with a high MCS level to a deboosting area and a data burst with a low MCS level to a normal area, and proceeds to step 746 of FIG. 7C. Here too, the base station does not allocate a data burst to the deboosting area at the minimum MCS level.

Referring to FIG. 7C, in step 746, the base station calculates the number of slots of the data burst to determine whether all data bursts can be allocated to the sub data burst area after completing allocation of the sub data burst area of the data burst. Proceed to step 748. In step 748, the base station proceeds to step 750 when the calculated number of data burst slots can be allocated to the corresponding sub data burst area. Otherwise, the base station proceeds to step 754.

In step 750, the base station selects a group having the smallest number of null padded slots among the single group or the composite group and proceeds to step 752.

In step 752, the base station determines whether two or more groups having the same number of null padded slots exist. As a result of the determination, if more than one exists, step 760 is performed, and if only one exists, step 762 is performed.

In step 754, the base station determines whether data bursts can be divided. If partitioning is possible, the process proceeds to step 756. If partitioning is not possible, the data burst allocation fails. In step 756, the base station divides the data burst by the number of slots that can be allocated to the sub data burst region and proceeds to step 758. In step 758, the base station determines whether two or more groups having the largest number of assignable slots exist. If more than one group exists, go to step 760; otherwise, go to step 762.

In step 760, the base station selects a group with a larger number of subchannels per group as the data burst allocation group because there are two or more selected groups. In step 762, the base station determines whether the selected group is a composite group. As a result of the determination, if it is a composite group, the process proceeds to step 764, and if it is a single group, the process proceeds to step 766.

In step 764, the base station shifts the data bursts if there are data bursts previously assigned to the composite group, allocates the data bursts, and proceeds to step 768. If a new data burst is allocated to an allocable complex group region without shifting the data burst allocated to the existing composite group, a space slot may occur between the existing data bursts and the newly allocated data burst, thereby efficiently utilizing resources. Data burst allocation scheduling becomes difficult. In step 766, the base station allocates a data burst slot to the corresponding group, that is, selected single group slots, and proceeds to step 768.

In step 768, the base station calculates MAP overhead according to the completion of data burst allocation and proceeds to step 770. The MAP overhead calculation is for determining whether the next data burst can be allocated to the data burst area according to the size of the MAP area. In step 770, the base station determines whether there is no data burst to transmit or only a data burst that cannot satisfy even the minimum MCS level (MCS Level = 1, QPSK 1/12). If it is determined that there is no data burst to be transmitted or there is only a data burst that cannot satisfy even the minimum MCS level (MCS Level = 1, QPSK 1/12), the operation proceeds to step 772; otherwise, the operation proceeds to step 746. . In step 772, the base station allocates an empty sub data burst area to data bursts by changing the frame structure. The frame structure change will be described with reference to FIGS. 8 and 9.

8 is a diagram illustrating an example of changing a frame structure in a broadband wireless access communication system according to a second embodiment of the present invention.

Referring to FIG. 8, when the data burst allocation area is divided into three sub data burst areas, that is, a boosting area, a normal area, and a deboosting area, the frame structure is changed when there is only one empty sub data burst area, and thus A data burst reallocation method and a method of changing a frame structure and a corresponding data burst reallocation method when two empty sub data burst areas are provided will be described. For example, if there are only data bursts that must be allocated to the boosting area and the normal area, and there are no data bursts to be allocated to the deboosting area, the presence of the deboosting area is a cause of resource waste. Therefore, resource utilization may be improved by reconfiguring time and frequency resources of the de boosting region into time and frequency resources of the boosting region and the normal region.

First, when one sub data burst region is empty, it may be represented by a combination as shown in Table 2 below.

Case. One Case. 2 Case. 3 Boosting Area (BR) Full Full Empty Normal area (NR) Full Empty Full Deboosting Area (DR) Empty Full Full

For the three cases shown in Table 2, the frame structure may be changed to two sub data burst regions. That is, the frame structure of the existing boosting area, the normal area, and the deboosting area is changed to the FSC_boost area BR 'and the FSC_deboost area DR'. According to the frame structure change, the data burst allocated to the sub data burst region of the existing frame should be changed / assigned to the newly changed sub data burst region as follows.

Case.1: Change / assign the data burst in the boosting area BR to the FSC_ boosting area BR ', and change / assign the data burst in the normal area NR to the FSC_deboost area DR'. .

Case.2: Change / assign data burst in boosting area BR to FSC_boost area BR ', change / assign data burst in deboosting area DR to FSC_deboost area DR' do.

Case.3: Change / assign the data burst of the normal area NR to the FSC_boost area BR ', and change / assign the data burst of the deboost area DR to the FSC_deboost area DR'. do.

Next, when two sub data burst regions are empty, they may be represented by a combination as shown in Table 3 below.

Case. One Case. 2 Case. 3 Boosting Area (BR) Full Empty Empty Normal area (NR) Empty Full Empty Deboosting Area (DR) Empty Empty Full

For the three cases shown in Table 3, the frame structure can be changed to one sub data burst region. That is, the frame structure is changed from the existing boosting region, the normal region, and the deboosting region to a frame structure Chang (FSC) _normal region NR '. According to the frame structure change, the data burst allocated to the sub data burst region of the existing frame is allocated to the entire newly changed sub data burst region NR ', and the boosting or the deboosting is not performed.

9 is a flowchart illustrating a process of changing a frame structure and changing allocation of data bursts by a base station in a broadband wireless access communication system according to a second embodiment of the present invention.

Referring to FIG. 9, in step 902, the base station determines whether an empty sub data burst region exists. If it is determined that there is an empty sub data burst region, the flow proceeds to step 904. In step 904, the base station determines whether there is one empty sub data burst region. As a result of the determination, the process proceeds to step 906 in case of one, and the process proceeds to step 908 in case of two.

In step 906, the base station changes the frame structure divided into three sub data burst regions into an FSC_ boosting region BR 'and an FSC_deboost DR', and proceeds to step 910. FIG. In step 910, the base station changes / allocates previously allocated data bursts according to the changed frame structure to the changed sub data burst regions (ie, the FSC_boosting region and the FSC_deboosting region).

In step 908, the base station changes the frame structure divided into three sub data burst regions into an FSC_normal region NR 'and proceeds to step 910. FIG. In step 910, the base station changes / allocates previously allocated data bursts according to the changed frame structure to the changed sub data burst area (ie, FSC_normal area).

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, the present invention utilizes system-wide resources by efficiently allocating a data burst to a data burst allocation area of a downlink frame including a sub data burst area performing a predetermined power boost in a broadband wireless access communication system. There is an advantage to maximize efficiency.

Claims (52)

In a broadband wireless access communication system in which a downlink frame divided into time and frequency resources exists, the downlink frame includes a data burst allocation region and a data burst having a priority to be transmitted to a mobile station exists. In the resource allocation method for, The data burst allocation region is divided into at least one sub data burst region, wherein the sub data burst region is configured to configure the downlink frame such that power amplification is performed according to a preset power level; Allocating the data burst to a specific sub data burst area of the sub data burst area according to a predetermined criterion; When there is a data burst not allocated due to the use of all time and frequency resources of the specific sub data burst region, determining whether there is at least one other sub data burst region in which resource allocation is possible; And if present, assigning to another sub data burst area in consideration of the priority of the data burst that has not been allocated. The method of claim 1, The power level is any one of 0 dB, ± 3 dB, ± 6 dB, ± 9 dB, and ± 12 dB. The method of claim 1, wherein the allocating of the data burst according to a predetermined criterion when the two sub data burst regions are performed; Comparing a preset threshold with a carrier to interference and noise ratio (CINR) of the data to be transmitted; A sub-data burst region for performing power amplification at a first power level for a data burst having a CINR higher than the threshold, and performing a power amplification at a second power level for a data burst having a CINR lower than a threshold. And allocating to a data burst region. The method of claim 3, wherein The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level Said power level. The method of claim 1, wherein the allocating of the data burst according to a predetermined criterion when the three sub data burst areas are three; Comparing the CINRs of the data to be transmitted with the preset first and second thresholds; Allocating to a sub data burst region that performs power amplification at a first power level for a data burst having a CINR lower than the first threshold, and assigning to a data burst having a CINR higher than the first threshold and lower than the second threshold. Allocating to a sub data burst region performing power amplification at a second power level, and allocating a sub data burst region performing power amplification at a third power level for a data burst having a CINR higher than the second threshold. The method characterized in that it comprises a. The method of claim 5, The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level The power level, wherein the third power level is any one of power levels having a dB value lower than the second power level. The method of claim 5, The sub power performing the power amplification at the third power level when there is no change in the modulation and coding scheme (MCS) level after -3 dB power amplification among the data bursts allocated to the sub data burst area performing the power amplification at the second power level. Reassignment to a data burst region. The method of claim 5, If there is no change in the MCS level after the 3 dB power amplification among the data bursts allocated to the sub data burst area for performing power amplification at the first power level, reassignment to the sub data burst area for performing power amplification at the second power level is performed. Characterized in that the method. The method of claim 5, Wherein the second threshold has a CINR value that is higher than the first threshold. The method of claim 1, The priorities are prioritized in order of unsolicited guaranteed service (UGS), real-time polling service (rtPS), extended real-time polling service (ertPS), non-real-time polling service (nrtPS), and best attempt (BES). The method. The method of claim 1, Determining a power level of the sub data burst region when there is one sub data burst region in which time and resource allocation is possible for the unassigned data burst; And if the power level is 0 dB or more, allocating the sub data burst area in consideration of the priority of the data burst. The method of claim 11, Determining that the data burst has a minimum MCS level when the data burst should be allocated to a sub data burst region corresponding to a power level of 3 dB or more according to a predetermined criterion when the power level is less than 0 dB; , And allocating the sub data burst area having a power level of less than 0 dB with respect to the remaining data bursts except for the minimum MCS level in consideration of priority. The method of claim 1, Determining power levels of each of the two sub data burst regions when there are two sub data burst regions in which time and resource allocation is possible for the unassigned data burst; When the determined power level of the sub data burst regions is 0 dB or more, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; And if it is impossible to allocate to the sub data burst region having the high power level, allocating the sub data burst region having the low power level in consideration of the priority of the data burst. The method of claim 13, If the determined power level of the sub data burst regions is greater than 0 dB and less than 0 dB, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; And if it is impossible to allocate to the sub data burst region having the high power level, allocating the sub data burst region having the low power level in consideration of the priority of the data burst. The method of claim 13, When the determined power level of the sub data burst regions is 0 dB or less, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; If it is impossible to allocate to the sub data burst region having the high power level, the method includes allocating the sub data burst region having the low power level in consideration of the priority of the remaining data bursts except for the data burst having the minimum MCS level. Characterized in that the method. There is a downlink frame divided into time and frequency resources, and the downlink frame includes a MAP region and a data burst allocation region including general broadcast information, and a broadband radio having a data burst having a priority to be transmitted to a mobile station. In the access communication system, the resource allocation method for the data burst transmission, The data burst allocation region is divided into at least one sub data burst region, and the sub data burst region includes a group in which power amplification is performed according to a preset power level and divided into at least one sub channel unit. The process of constructing the frame, Allocating the data burst to a specific sub data burst area of the sub data burst area according to a predetermined criterion; Selecting slots having a minimum number of slots remaining after being occupied by the data burst when there are slots to occupy the entire data burst in the specific sub data burst region; Allocating a data burst to the selected group; When there is a data burst not allocated due to the use of all time and frequency resources of the specific sub data burst region, determining whether there is at least one other sub data burst region in which resource allocation is possible; And if present, assigning to another sub data burst area in consideration of the priority of the data burst that has not been allocated. The method of claim 16, And if more than one group having the minimum number of slots remaining after being occupied by the data burst exists, selecting a group having a large number of subchannels per group. The method of claim 16, Determining whether the data burst is divisible when there are only slots that can occupy only a portion of the data burst in the specific sub data burst region; If it is a partitionable data burst, the process of selecting a group with the maximum number of occupied slots, Dividing the data burst by the number of occupied slots; And allocating the divided data bursts to the occupiable slots. The method of claim 16, The power level is any one of 0 dB, ± 3 dB, ± 6 dB, ± 9 dB, and ± 12 dB. The method of claim 16, wherein the assigning of the data burst according to a predetermined criterion when the two sub data burst regions are performed; Comparing a preset threshold with a carrier to interference and noise ratio (CINR) of the data to be transmitted; A sub-data burst region for performing power amplification at a first power level for a data burst having a CINR higher than the threshold, and performing a power amplification at a second power level for a data burst having a CINR lower than a threshold. And allocating to a data burst region. The method of claim 20, The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level Said power level. The method of claim 16, wherein the allocating of the data burst according to a predetermined criterion when the three sub data burst areas are three; Comparing the CINRs of the data to be transmitted with the preset first and second thresholds; Allocating to a sub data burst region that performs power amplification at a first power level for a data burst having a CINR lower than the first threshold, and assigning to a data burst having a CINR higher than the first threshold and lower than the second threshold. Allocating to a sub data burst region performing power amplification at a second power level, and allocating a sub data burst region performing power amplification at a third power level for a data burst having a CINR higher than the second threshold. The method characterized in that it comprises a. The method of claim 22, The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level The power level, wherein the third power level is any one of power levels having a dB value lower than the second power level. The method of claim 22, If there is no change in the modulation and coding scheme (MCS) level after -3 dB power amplification among data bursts allocated to the sub data burst region performing power amplification at the second power level, power amplification is performed at the third power level. And reallocating to a sub data burst region. The method of claim 22, If there is no change in the MCS level after the 3 dB power amplification among the data bursts allocated to the sub data burst area for performing power amplification at the first power level, reassignment to the sub data burst area for performing power amplification at the second power level is performed. Characterized in that the method. The method of claim 22, Wherein the second threshold has a CINR value that is higher than the first threshold. The method of claim 16, And ending the data burst allocation if the MAP region cannot record allocation information according to the data burst allocation. The method of claim 16, The priorities are prioritized in order of unsolicited guaranteed service (UGS), real-time polling service (rtPS), extended real-time polling service (ertPS), non-real-time polling service (nrtPS), and best attempt (BES). The method. The method of claim 16, Determining a power level of the sub data burst region when there is one sub data burst region in which time and resource allocation is possible for the unassigned data burst; And if the power level is 0 dB or more, allocating the sub data burst area in consideration of the priority of the data burst. The method of claim 29, Determining that the data burst has a minimum MCS level when the data burst should be allocated to a sub data burst region corresponding to a power level of 3 dB or more according to a predetermined criterion when the power level is less than 0 dB; , And allocating the sub data burst region having a power level less than 0 dB with respect to the remaining data bursts except for the minimum MCS level in consideration of priority. The method of claim 16, Determining power levels of each of the two sub data burst regions when there are two sub data burst regions in which time and resource allocation is possible for the unassigned data burst; When the determined power level of the sub data burst regions is 0 dB or more, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; And if it is impossible to allocate to the sub data burst region having the high power level, allocating the sub data burst region having the low power level in consideration of the priority of the data burst. The method of claim 31, wherein If the determined power level of the sub data burst regions is greater than 0 dB and less than 0 dB, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; And if it is impossible to allocate to the sub data burst region having the high power level, allocating the sub data burst region having the low power level in consideration of the priority of the data burst. The method of claim 31, wherein When the determined power level of the sub data burst regions is 0 dB or less, allocating the sub data burst region having a high power level in consideration of the priority of the data burst; If it is impossible to allocate to the sub data burst region having the high power level, the method includes allocating the sub data burst region having the low power level in consideration of the priority of the remaining data bursts except for the data burst having the minimum MCS level. Characterized in that the method. In a broadband wireless access communication system in which a downlink frame divided into time and frequency resources exists, the downlink frame includes a data burst allocation region and a data burst having a priority to be transmitted to a mobile station exists. In the resource allocation method for, The data burst allocation region is divided into at least one sub data burst region, wherein the sub data burst region is configured to configure the downlink frame such that power amplification is performed according to a preset power level; Allocating the data burst to a specific sub data burst area of the sub data burst area according to a predetermined criterion; If there is a data burst that cannot be allocated due to the use of all time and frequency resources of the particular sub data burst region, and the data burst should be allocated to one sub data burst region, another sub data burst capable of resource allocation Determining whether at least one region exists, And if present, assigning to another sub data burst area in consideration of the priority of the data burst that has not been allocated. The method of claim 34, wherein The power level is any one of 0 dB, ± 3 dB, ± 6 dB, ± 9 dB, and ± 12 dB. 35. The method of claim 34, wherein the assigning of the data bursts according to a predetermined criterion when the two sub data burst regions are performed; Comparing a preset threshold with a carrier to interference and noise ratio (CINR) of the data to be transmitted; A sub-data burst region for performing power amplification at a first power level for a data burst having a CINR higher than the threshold, and performing a power amplification at a second power level for a data burst having a CINR lower than a threshold. And allocating to a data burst region. The method of claim 36, The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level Said power level. 35. The method of claim 34, wherein the allocating the data bursts according to a predetermined criterion when the three sub data burst regions are three; Comparing the CINRs of the data to be transmitted with the preset first and second thresholds; Allocates to a sub data burst region that performs power amplification at a first power level for a data burst having a CINR lower than the first threshold, and assigns to a data burst having a CINR higher than the first threshold and lower than the second threshold. Allocating to a sub data burst region performing power amplification at a second power level, and allocating a sub data burst region performing power amplification at a third power level for a data burst having a CINR higher than the second threshold. The method characterized in that it comprises a. The method of claim 38, The first power level is any one of 0dB, ± 3dB, ± 6dB, ± 9dB, ± 12dB, the second power level of any one of the power level having a dB value lower than the first power level The power level, wherein the third power level is any one of power levels having a dB value lower than the second power level. The method of claim 38, The sub power performing the power amplification at the third power level when there is no change in the modulation and coding scheme (MCS) level after -3 dB power amplification among the data bursts allocated to the sub data burst area performing the power amplification at the second power level. Reassignment to a data burst region. The method of claim 38, If there is no change in the MCS level after the 3 dB power amplification among the data bursts allocated to the sub data burst area for performing power amplification at the first power level, reassignment to the sub data burst area for performing power amplification at the second power level is performed. Characterized in that the method. The method of claim 38, Wherein the second threshold has a CINR value that is higher than the first threshold. The method of claim 34, wherein The priorities are prioritized in order of unsolicited guaranteed service (UGS), real-time polling service (rtPS), extended real-time polling service (ertPS), non-real-time polling service (nrtPS), and best attempt (BES). The method. The method of claim 34, wherein Determining a power level of the sub data burst region when there is one sub data burst region in which time and resource allocation is possible for the unassigned data burst; And if the power level is 0 dB or more, allocating the sub data burst area in consideration of the priority of the data burst. The method of claim 44, Determining that the data burst has a minimum MCS level when the data burst should be allocated to a sub data burst region corresponding to a power level of 3 dB or more according to a predetermined criterion when the power level is less than 0 dB; , And allocating the sub data burst region having a power level less than 0 dB with respect to the remaining data bursts except for the minimum MCS level in consideration of priority. The method of claim 34, wherein Determining power levels of each of the two sub data burst regions when there are two sub data burst regions in which time and resource allocation is possible for the unassigned data burst; Comparing the MCS level of the data burst having a first priority and the data burst having a second priority when the power level of the determined sub data burst regions is 0 dB or more; If the MCS levels of the two data bursts are the same, the first priority data burst is allocated to a sub data burst region having a high power level, and the second priority data burst is allocated to a sub data burst region having a low power level. The method comprising the step of. 47. The method of claim 46 wherein If the MCS levels of the two data bursts are different, assigning a data burst having a high MCS level to a sub data burst region having a low power level and a data burst having a low MCS level to a sub data burst region having a high power level The method characterized in that it further comprises. 47. The method of claim 46 wherein Comparing the MCS levels of a data burst having a first priority and a data burst having a second priority when the power level of the determined sub data burst regions is greater than 0 dB and less than 0 dB; If the MCS levels of the two data bursts are the same, except for the data burst having the minimum MCS level, the first priority data burst is lower in the sub data burst region having a higher power level than the second priority data burst. And allocating to a sub data burst region having a power level. The method of claim 48, If the MCS levels of the two data bursts are different, except for data bursts having a minimum MCS level, data bursts having a higher MCS level may be used in a sub data burst region having a lower power level, and data bursts having a lower MCS level may have higher power. And assigning to a sub data burst region having a level. 47. The method of claim 46 wherein Comparing the MCS level of the data burst having a first priority and the data burst having a second priority when the power level of the determined sub data burst regions is 0 dB or less; If the MCS levels of the two data bursts are the same, the first priority data burst is allocated to a sub data burst region having a high power level, and the second priority data burst is allocated to a sub data burst region having a low power level. Said method comprising a process. 51. The method of claim 50, If the MCS levels of the two data bursts are different, assigning a data burst having a high MCS level to a sub data burst region having a low power level and a data burst having a low MCS level to a sub data burst region having a high power level The method characterized in that it further comprises. There is a downlink frame divided into time and frequency resources, and the downlink frame includes a data burst allocation region, and in a broadband wireless access communication system in which there is a data burst to be transmitted to a mobile station, resource allocation for the data burst transmission In the method, The data burst allocation region is divided into at least one sub data burst region, wherein the sub data burst region configures the downlink frame such that power amplification is performed according to a preset power level; Allocating the data burst to the sub data burst region according to a predetermined criterion; Determining whether there is at least one sub data burst region in which resources can be allocated If present, reconstructing the downlink frame such that time and frequency resources of the resource allocation sub data burst region become time and frequency resources of the sub data burst region to which data burst is allocated; And allocating a data burst previously allocated to the reconstructed downlink frame.

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