JPH0722271B2 - Intermittent reception method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an intermittent reception system in which a mobile station such as a car telephone or the like intermittently receives.

(Prior Art) Generally, a mobile station apparatus is required to constantly receive a control signal including an incoming call signal in order to handle an incoming call.

However, when such a mobile station device is used as a portable device, a battery such as a dry battery is used as a power source, and thus the constant reception state has a problem in terms of power consumption as described above.

Therefore, in such a portable mobile station apparatus, the intermittent reception method is often adopted.

In such an intermittent reception method, for example, only the system information in the control signal is received at every predetermined time, in other cases, the reception state is released, and the system information includes information that should receive the predetermined control signal. It receives the required control signal only when included.

However, if the above-mentioned control signal has a variable length according to the traffic volume, that is, if the time until the next system information is received after receiving the system information is uneven, the above intermittent reception is performed. There is a problem that the method cannot handle.

(Problems to be Solved by the Invention) As described above, in the above-described conventional intermittent reception method in the mobile station device, there is a problem that it cannot be dealt with when the control signal has a variable length due to the traffic amount or the like. is there.

The present invention has been made under such circumstances, and an object of the present invention is to provide an intermittent reception method capable of performing intermittent reception even when a control signal has a variable length.

[Structure of the Invention] (Means for Solving Problems) According to the present invention, the base station constantly broadcasts system information in an arbitrary cycle in which the base station may fluctuate, and at the same time suddenly broadcasts other control information to move the system information. In a communication system in which a station device always receives the system information and selectively receives the other control information, the base station may indicate the timing of broadcasting the next system information in the system information. The first timing signal is added and broadcast, and when it becomes necessary to broadcast the other control information, a second timing signal indicating the timing for broadcasting the other control information is added and broadcast, A mobile station device controls on / off of power supply to a circuit of a receiving system of the mobile station device based on the first timing signal and the second timing signal. A.

(Operation) In the present invention, the mobile station apparatus receives data intermittently according to the timing information transmitted from the base station.
Therefore, it is possible to cope with the case where the control signal has a variable length.

(Example) Hereinafter, the detail of the Example of this invention is described based on drawing.

FIG. 1 is a diagram showing a mobile station apparatus according to an embodiment of the present invention.

The mobile station device 1 shown in the figure has a transmission / reception circuit 3 that forms a radio line 2 with a base station (not shown), a control signal processing circuit 4 that processes a control signal sent from the base station, and a power supply for these. And a battery circuit 5 for supplying

The transmission / reception circuit 3 receives a reception signal coming from a base station via the radio circuit 2 at a receiver 8 via an antenna 6 and a transmission / reception duplexer 7, supplies the signal to a handset 9 and a transmitter 10 The transmission signal input from is transmitted by the transmitter 11 to the wireless line 2 via the duplexer 7 and the antenna 6. In addition, this transmission / reception circuit 3 has a synthesizer 12,
The transmitter in this synthesizer 12 under the control of the control circuit 13
11 and the transmission / reception channel used by the receiver 8 are designated. Further, since the communication system in the mobile station device 1 controls the incoming call by the control signal using the control channel and then makes the normal call by the call signal using the call channel, it is received by the control channel. The control signal is sent to the control signal processing circuit 4.

The control signal processing circuit 4 includes a bit synchronization circuit 14 that establishes synchronization with the bits of the frame of the control signal sent from the base station according to a certain time slot, and after the bit synchronization circuit 14 establishes bit synchronization. And a frame synchronization circuit 15 for establishing synchronization with the frame. In addition, the control signal processing circuit 4 receives the control signal at the established timing when the synchronization with the bit and the frame is established by the bit synchronizing circuit 14 and the frame synchronizing circuit 15 and receives the control signal. The signal processed by the control signal reception processing circuit 16 is provided by the control circuit 13
It will be sent to.

On the other hand, the battery circuit 5 includes the battery 17 and the battery 17
And a power supply control circuit 18 for stably supplying electric power from. A switch 19 is inserted between the battery 17 and the power supply control circuit 18, and the switch 19 is used to switch ON / OFF of the entire mobile station device 1. Further, a transistor 20 is provided between the current control circuit 18 and the transmitter 11, a transistor 21 is provided between the current control circuit 18 and the synthesizer 12 and the receiver 8, and a current control circuit 18, the bit synchronization circuit 14 and the frame are provided. Synchronous circuit 15
And a transistor between the control signal reception processing circuit 16 and
22 are inserted respectively, these transistor 20,
The ON / OFF control of 21 and 22 is performed by the control of the control circuit 13.

Next, the frame format of the control signal used between the mobile station apparatus 1 and the base station by the control channel will be described with reference to FIG.

That is, as the control channel, the D channel used when setting the initial state and the P channel used when waiting for the incoming call signal are received.
There is a channel and an A channel used after receiving an incoming call signal, but the basic frame format is required for two sets of system parameter frames (System Prameter Flame) SP ₁ and SP ₂ containing system information. The frame has a variable length and is variable from a minimum of 2 frames to a maximum of 16 frames according to conditions such as the amount of traffic. The frames added as described above include a control filler frame (Cntrol Filler Flame) CF and an incoming call information frame PAG.
E Call channel designation signal frame I consisting of 2 sets I
VCD _1, IVCD _2, there is formed a control channel switch frame DR ₁ ~DR ₄ such four pairs. Further, in particular, a battery saving parameter frame BSP described later is added to the P channel immediately after the system parameter frames SP ₁ and SP ₂ .

Next, connection control of an incoming call performed by the mobile station device 1 having the above-described configuration and a control signal will be described with reference to FIG.

First, when the power of the mobile station device 1 is turned on (step 301), the mobile station device 1 is initialized (step 302), and scanning is performed on the D channel of the control channel (step 303). In this scan, for example, the channel having the highest electric field strength is searched from the D channels consisting of 21 channels, and the position information and the like are received by this channel.

Next, the same scan as that described above is performed on, for example, 21 channels of P channels (step 304), and thereafter, a predetermined P channel waits for reception of an incoming call signal (step 305). Then, when an incoming call signal is received during this time, the same scan as above is performed on the A channel consisting of, for example, 21 channels (step 306), and a response signal is transmitted on a predetermined channel (step 307), and a call is made again. A channel designation signal is received (step 308).

After that, the designated call channel is switched (step 309), a call signal is received by this call channel (step 310), and then a response (step 311), a call (step 312), and a call end (step 313). Up to this point, the same operation as a general telephone is performed, and when such an operation is completed, the process returns to step 304 again.

In the present embodiment, the following intermittent reception is carried out at the time of waiting for the incoming call signal in steps 304 to 305 described above.

That is, in the battery saving parameter frame BSP added immediately after the system parameter frames SP ₁ and SP ₂ of the control signal in the P channel, the control circuit 13 controls ON / OFF of the transistors 21 and 22 in the mobile station device 1. Information is included, and FIG. 4 is a timing chart showing the timings at which the transistors 21 and 22 are turned on / off. In the following, a frame sequence composed of the system parameter frames SP ₁ and SP ₂ and the battery saving parameter frame BSP is referred to as a system information frame sequence OMT (Overhead Message Tr
ain).

As shown in FIG. 4, the transistor 2 is initially set.
1 and 22 are set to the ON state, and when the system information frame sequence OMT is received in this state, the battery saving parameter frame B of this system information frame sequence OMT is received.
The SP includes information m _OMT that should turn off the transistors 21 and 22 until the next system information frame sequence OMT is received.
The transistors 21 and 22 are turned off until T is received.

Hereinafter, such ON / OFF control of the transistors 21 and 22 is repeated, but at that time, the system information frame sequence OMT
When it is required that the incoming call information frame PAGE be received between and the next system information frame sequence OMT,
At this time, information such as m _PAGE that turns on the transistors 21 and 22 is stored in the battery saving parameter frame BSP.
In this case, the transistors 21 and 22 are turned on at this timing, whereby the incoming call information frame PAGE is received and the incoming call signal is received. It should be noted that when receiving another frame, the same operation as described above is performed.

Then, at the time of waiting for a normal incoming call signal,
Since the transistors 21 and 22 are in the OFF state except when the system information frame sequence OMT is received, no electric power is supplied from the battery circuit 5 to the signal processing circuit 4, the receiver 8 and the synthesizer 12, that is, in this state. Only the control circuit 13 and the power supply control circuit 18 are supplied with electric power from the battery circuit 5, whereby the power consumption can be reduced.

In addition, as described above, even if the control signal frame has a variable length depending on the traffic volume, that is, even if the interval between the system information frame sequence OMT and the next system information frame sequence OMT is variable, battery saving is performed each time. This can be dealt with by changing the information m _OMT of the parameter frame BSP.

In the above case, the system information frame sequence OMT is composed of the system parameter frames SP ₁ and SP ₂ and the battery saving parameter frame BSP. Saving parameter frame BS
When P may be included, that is, it has a variable length, for example, it can be dealt with by including the information n indicating the number of frames in the head system parameter frame SP ₁ of this system information frame sequence OMT. Battery saving parameter frame BSP
May be composed of a plurality of frames instead of one frame.

Also. Information contained in the battery saving parameter frame BSP of the system information frame sequence OMT described above m _OMT
Therefore, it is preferable that the timing at which the transistors 21 and 22 are turned on next is, for example, as shown in FIG. In other words, after the transistors 21 and 22 are turned on, the rise time of the receiver 8 and the synthesizer 12 and the rise time when the control signal is completely received by the mobile station device 1 can be risen and received. After that, the transistors 21 and 22 are turned on at the timing considering the bit synchronization time and the frame synchronization time after this.
It is preferable to use the information m _OMT to be turned on. Further, it is preferable that the transistors 21 and 22 are turned off at the timing when the transistors 21 and 22 should be turned off in consideration of the control signal processing time by the control signal reception processing circuit 16.

Next, the frame configuration of the control signal when the present invention is applied to the system currently in operation will be described in detail.

FIG. 6 shows a general structure of the system parameter frame. The first ₂ bits (T ₁ T ₂ ) being 11 indicates that the frame is a kind of OMT. It should be noted that what kind of frame such a frame is is recognized by the 3 bit value (OHD) of the 26th bit to the 28th bit of each frame. That is, for example, if OHD = 110, word 1 (SP1) of the system parameter frame, if OHD = 111, word2 (SP2) of the system parameter frame, OHD = 0
If 01, it is recognized as a control filler frame.

FIG. 7 is a diagram showing a region including information n indicating the number of frames described on page 12, line 18 to page 13, line 12 of the present specification.

In the figure, 4 bits of NAWC are used to represent this n. Therefore, the number of frames following the system parameter frame SP ₁ can be designated from 0 to 15 (2n-1). Note that NAWC only differs in the number of subsequent frames, and what kind of frame each frame is can be recognized by the OHD value of each frame.

Next, FIG. 8 is a diagram showing an example of a frame configuration of a battery saving parameter frame BSP subsequent to the system parameter frames SP ₁ and SP ₂ .

The battery saving parameter frame BSP from the 5th bit to the 24th bit is an area that can contain arbitrary information, but in this battery saving parameter frame BSP, from the 15th bit to the 24th bit, this Information indicating the time slot of the next system information is put in the area. For example, when the next OMT is in the 15th slot from the battery saving parameter frame BSP, the data "0000001111" is stored in this area. When this data is received, when the reception timing of the fifteenth slot arrives from the battery saving parameter frame BSP, the transistors 21 and 22 are turned on, and the receiving section and the control signal processing circuit 4 are activated. Therefore, it can be specified from the first frame following this battery saving parameter frame BSP to 2 ^tenth. The fact that this frame is the battery saving parameter frame BSP including the information indicating the time slot of the next system information is recognized by the OHD being "010".

Next, FIG. 9 is a diagram showing another example of the frame structure of the battery saving parameter frame BSP subsequent to the system parameter frames SP ₁ and SP ₂ .

In the battery saving parameter frame BSP, the 15th bit to the 24th bit are used to put information indicating the time slot of the incoming call signal in this area. For example, from this battery saving meter frame BSP 10
When there is an incoming call signal in the second slot, the data "0000001010" is stored in this area. When this data is received, this battery saving parameter frame
When the reception timing of the tenth slot arrives from the BSP, the transistors 21 and 22 are turned on, and the receiving section and the control signal processing circuit 4 are turned on. The fact that this frame is the battery saving parameter frame BSP including the information indicating the time slot of the incoming call signal is recognized by the fact that the OHD is "011".

Next, FIG. 10 is a diagram showing still another example of the frame structure of the battery saving parameter frame BSP subsequent to the system parameter frames SP ₁ and SP ₂ .

In this battery saving parameter frame BSP, an area that can include arbitrary information (5th bit to 24th bit)
Utilizing all the bits), the first half 10 bits contain information indicating the time slot of the next system information, and the second half 10 bits contain information indicating the time slot of the incoming call signal. According to this battery saving parameter frame BSP, the empty area of the battery saving parameter frame BSP can be effectively used, and the number of battery saving parameter frames BSP will not be increased more than necessary. The first
In Fig. 0, OHD = "011", which is indistinguishable from the battery saving parameter frame BSP in Fig. 9, so that OHD = "011" can be used as a battery saving parameter frame BSP when constructing the system. It is necessary to set in advance whether to allocate.

The present invention can also be applied to a case where a large number of mobile station devices are divided into a plurality of mobile station devices and an incoming call is made for each group.

That is, in this case, if the battery saving parameter frame BSP includes information indicating a group and only the incoming call information frame PAGE corresponding to each group is received for each group, the intermittent reception method of the present invention is realized. To be done. Specifically, the eleventh
As shown in the figure, the area where the arbitrary information of the battery saving parameter frame BSP can be included (5th bi
The 20th to 24th bits) are assigned to each group by 20bits (thus, the group can be set up to 20 groups). Each mobile station device is set in advance to which group the device belongs. For example, if you belong to group 15,
If the 15th bit is “0”, it is considered that there is no incoming call to the own device, and the receiving unit and the control signal processing unit are turned off until the next OMT reception timing. As if there is a call, the reception unit and the control signal processing unit are turned on at the reception timing of the Xth time slot (X is assumed to be preset when the system is constructed) from this battery saving parameter frame BSP. To do. In this case, the OMT reception needs to be performed periodically.

In addition, as shown in FIG. 12, the arbitrary area of 20 bits is divided into the first half and the second half, information indicating the group is put in the first 4 bits of the first half, and in the next 6 bits, the number of time slots from the battery saving parameter frame BSP. Information about whether there is an incoming call may be included. For example, in the first half
If the data "0100001010" is present in 10 bits, it means that there is an incoming call to any mobile station device belonging to the fourth group, and the incoming call is in the tenth slot from the battery saving parameter frame BSP. . Therefore, if the mobile station device that has received the battery saving parameter frame BSP belongs to the fourth group, the receiving unit and the control signal processing circuit 4 are operated at the reception timing of the tenth slot from the battery saving parameter frame BSP. State. In addition, the latter half 10bits also the first half
Same as 10bits. Therefore, it is possible to include the incoming call information of two groups by one battery saving parameter frame BSP. Conversely, if there are incoming calls to 5 groups, 3 battery saving parameter frames BSP
Is required. In this case, the number of subsequent battery saving parameter frames BSP may be designated by NAWC in the system parameter frame SP ₁ as shown in FIG.

When the data indicating the group in FIG. 12 is “0000”, the time slot of the first block indicates the time slot of the next system information, and the time slot of the next block indicates the time slot of the incoming call signal. May be

Further, each incoming call information frame PAGA specified in the battery saving parameter frame BSP of FIG. 9, FIG. 10, FIG. 11 or FIG. 12 requires a plurality of frames as the incoming call amount increases. The length of the frame is variable, which can be dealt with by including information indicating the number of incoming signals in the incoming call information frame PAGE. Specifically, as shown in FIG. 13, it indicates the number (k) of incoming call signals that follow. Incidentally, MIN1 local telephone number in the Page1, the MIN2 of Page2 contains the toll line telephone number, identifies the Page1 and Page2 T ₁ T ₂ of the first 2bit is the "01" or "10" . FIG. 14 is a diagram showing a case where three incoming call information frames continue. Pa for each frame
The ge2 contains the number information of the number of subsequent frames. Therefore, only the receiving station can turn on the receiving system.

Although specific examples of frame configurations have been described above, various systems can be constructed by combining each frame. In addition, OHD is “010” and “01” in the current system.
Since 1 ”and“ 101 ”have not been set, OHD can be assigned and set without being restricted by the above example.

Further, the present invention is not limited to voice communication such as telephone communication, but can be widely applied to data communication and the like.

[Effects of the Invention] As described above, according to the intermittent reception system of the present invention, even if the control signal has a variable length, the reception is performed intermittently.
As a result, low power consumption can be achieved at the time of reception by the mobile station device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a mobile station apparatus according to an embodiment of the present invention, FIG. 2 is a format diagram of a frame of a control channel in this embodiment, and FIG. 3 is an incoming call connection in this embodiment. A flow chart for explaining the control,
FIG. 4 is a time chart for explaining the discontinuous reception system in this embodiment, FIG. 5 is a partially enlarged view thereof, and FIG. 6 is a diagram showing a general configuration of a system parameter frame in this embodiment. FIG. 7 is a diagram showing an area in which information n indicating the number of frames is included in the frame shown in FIG. 6, and FIG. 8 is a system parameter frame in this embodiment.
It illustrates an example of a frame structure of a battery saving parameter frames BSP subsequent to SP _1, SP _2, FIG. 9 to 14
The figure is a diagram showing another example of the frame structure of the battery saving parameter frame BSP following the system parameter frames SP ₁ and SP ₂ . 2 ... Mobile station device 3 ... Transceiver circuit 4 ... Control signal processing circuit 5 ... Battery circuit 20, 21, 22 ... Transistor

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Claims (2)

[Claims] 1. A base station constantly broadcasts system information at an arbitrary cycle that may fluctuate and other control information is suddenly broadcasted so that a mobile station apparatus always receives the system information and the other information. In a communication system that may selectively receive control information, the base station adds a first timing signal indicating the timing of broadcasting the next system information to the system information and broadcasts the system information. When it is necessary to broadcast the control information of the other control information, a second timing signal indicating the timing of broadcasting the other control information is added and broadcast, and the mobile station device transmits the first timing signal and the first timing signal. An intermittent reception system characterized by controlling on / off of power supply to a receiving system circuit of the mobile station device based on the timing signal of 2. 2. The intermittent reception system according to claim 1, wherein the other control information is incoming call information.