JP3246485B2 - Method and system for selecting from multiple service options in digital mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a CDMA digital cellular mobile telephone system (TIA / IS-95).
A), with regard to the call connection between the exchange and the mobile terminal by the multi-service option in the multi-service option, in particular, the digital exchange in which the exchange specifies first the service option (voice compression rate) confirmed in the first call connection in the subsequent call connection. The present invention relates to a method for selecting and setting a multi-service option in a communication system and a system thereof.

[0002]

2. Description of the Related Art Recent CDMA digital cellular mobile telephone systems (TIA / IS-95A standard)
With the introduction of the multi-service option, it is necessary to consider the call connection. For example, the voice compression rate is initially only 8 kbps / Q-CELP, and only the voice compression rate was supported by the exchange.
Audio compression rates such as 3 kbps / Q-CELP and 8 kbps / EVRC have been developed to improve sound quality.
That is, a plurality of audio compression rates are defined as service options.

In a digital cellular mobile telephone network of the CDMA system, the switching center needs to be able to support all voice compression rates, and needs to specify a service option corresponding to the voice compression rate supported by the mobile terminal. is there. However, in the current transmission mode, for example, a service option corresponding to a voice compression rate supported by each mobile terminal is provided by a home location register (HLR) or a visitor location register (VLR) for managing subscriber data. Is not managed.

[0004] For this reason, the switching center, at the time of call connection,
First, the service option set as the highest priority is specified. If the mobile terminal cannot support the service option specified by the switching center with the highest priority, the switching center establishes a connection between the mobile terminal and the mobile terminal so that the switching center can perform the call connection by the service option specified in the higher priority order. Negotiate service options.

[0005] As a procedure of this negotiation, "E
IA / IS-95A + TSB-74 section 7.6.
4.1.2 / Service Configurati
on and Negotiation "and" ARI
B / STD-T53 section 7.6.4.1.2 /
Standards for "Service Configuration and Negotiation" are presented.

A conventional example of such a CDMA digital cellular mobile telephone network is disclosed in Japanese Unexamined Patent Publication No.
No. 32645, "Non-telephone call connection system"
No. 0-304455, “Wireless packet voice receiving device”,
Japanese Patent No. 2658938 entitled "Digital Mobile Data Communication Switching System and Digital Mobile Communication Switch and Digital Mobile Data Communication Protocol Conversion Device Provided Therewith" and Japanese Patent No. 2758861 "Digital Mobile Data Communication System" In the current exchanges, the home location register (HLR) and the visitor location register (VLR) are known.
Does not manage service options corresponding to the audio compression rates supported by each mobile terminal as subscriber data.

[0007]

As described above, in the above-described conventional example, it is necessary to execute negotiation for each mobile terminal that cannot support the service option specified by the exchange every time a call is connected. That is, there is a waste that the same negotiation is repeatedly executed for each call connection to the same mobile terminal. As a result, there is a disadvantage that the call connection time becomes long and the processing load on the switching center increases.

[0008] The present invention solves such a problem in the prior art, and replaces the service option confirmed by the exchange with the result of the negotiation performed with the mobile terminal in the first call connection. It can be specified first in a call connection, so that service options need not be negotiated for each call connection,
It is an object of the present invention to provide a method for selecting and setting a multi-service option in a digital mobile communication system capable of reducing a call connection time and a processing load on an exchange, and a system thereof.

[0009]

To achieve the above object, a method for selecting and setting a multi-service option in a digital mobile communication system according to the present invention is to set a voice compression rate that can be supported by a mobile terminal.
A first step of setting a service option for applying the highest priority to subscriber data for each mobile terminal in the visitor location register of the exchange in advance; and the service option set in the first step allows the exchange to establish a connection with the mobile terminal. And establishing and storing a service option that can be supported by the mobile terminal at the time of this call connection, and specifying the stored service option at the time of the subsequent call connection. I have.

As the first step, processing for setting a service option storage area in subscriber data for each mobile terminal in a visitor location register of the exchange, and setting a service option to be applied with the highest priority in advance to the service option storage area Processing.

In the second step, the service option confirmed in the service negotiation at the time of the first call connection with the mobile terminal is rewritten and stored in the service option storage area. When a call connection is made, a service connection is first designated and a call connection is made.

In a digital mobile communication system according to the present invention, an exchange having a visitor location register for storing a service option selected from a plurality of voice compression rates that can be supported by a mobile terminal accommodates a plurality of radio base stations and performs communication. A home location register device, which is a database storing subscriber data, is connected to the network, and a service option for prioritizing the subscriber data for each mobile terminal in the visitor location register of the exchange with the highest priority is set. In accordance with the first processing means and the service option set by the first processing means, the exchange performs the first call connection with the mobile terminal, and confirms and stores the service options that can be supported by the mobile terminal in this call connection. And a second processing procedure designated at the time of subsequent call connection. A configuration including and.

The first processing means sets a service option storage area in the subscriber data of each mobile terminal in a visitor location register of the exchange, and stores a service option for applying the service option to the service option storage area with the highest priority in advance. There is a configuration to set.

Further, the second processing means, after setting the service option in the first processing means, stores the service option confirmed in the service negotiation at the time of the first call connection with the mobile terminal in the service option storage area. It is configured to be rewritten and stored, and specified when a call connection with the mobile terminal is made thereafter.

Further, as the storage of the service options selected from the plurality of voice compression rates in the first processing means, the service options selected from the plurality of voice compression rates in accordance with the priority order specified by the exchange are specified first. ,
If the mobile terminal receives a page signal storing the specified service option and the mobile terminal cannot support the service option notified by the page signal, the service option that the mobile terminal can support and a plurality of services at the exchange are provided. The service request signal and the service response signal are exchanged until the option matches, and the service option matched by the exchange is rewritten and stored in the service option storage area for each subscriber data in the visitor location register.

Further, when a service option that can be supported by the mobile terminal matches a plurality of service options in the exchange, a service connect signal and a service connect complete signal are exchanged, and a voice compression rate of the matched service option is exchanged. Is set to a call state.

Further, when the service options that can be supported by the mobile terminal do not all match a plurality of service options in the exchange, the exchange disconnects the call connection processing.

The subscriber data of the visitor location register may include at least an electronic serial number,
Mobile terminal identification number, supplementary service, and mobile terminal can support at the time of call connection for each mobile terminal,
Each area is provided for storing a service option corresponding to the voice compression rate specified by the exchange preferentially, and the exchange fetches the information from the home location register device and refers to the information to perform a call connection to the mobile terminal. There is a configuration.

Further, the subscriber data of the home location register device has information of an electronic serial number, a mobile terminal identification number, a supplementary service, a subscriber name, and a subscriber address. The configuration is such that a call connection to a mobile terminal is performed with reference to the configuration.

The method for selecting and setting from the multi-service option in the digital mobile communication system according to the present invention and the system for the service option are applied to the subscriber data of each mobile terminal in the visitor location register of the exchange with the highest priority in advance. Is set, the exchange makes the first call connection with the mobile terminal, and confirms and stores the service options that the mobile terminal can support at the time of the call connection, and stores the stored service options in the subsequent call connection. Specified at the time.

That is, the service option that can be supported by the mobile terminal, which is confirmed by the result of the negotiation performed by the exchange in the first call connection, can be first specified in the subsequent call connection. As a result, it is not necessary to negotiate a service option every time a call is connected, so that the call connection time is shortened and the processing load on the exchange is reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for selecting and setting a multi-service option in a digital mobile communication system according to the present invention and an embodiment of the system will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a method for selecting and setting a multi-service option in a digital mobile communication system according to the present invention and a configuration of the system according to an embodiment.

In FIG. 1, this example corresponds to ISDN or PS
A mobile communication network 1 for carrying out mobile communication by accommodating exchanges and cell base stations in a TN, and exchanges 2 and 3 for performing exchange connection in the mobile communication network 1
And service area accommodated in the exchange 3 (wireless section)
Base station (cell base station) that performs wireless line connection in Japan
And a home location register (HLR) device 5 which is a database provided in a central control station or the like accommodated in the mobile communication network 1 and stores subscriber data.
And a large number of mobile terminals 6 for making a call or transmitting data through a wireless line connection in a service area (wireless section) of the wireless base station 4.

The exchanges 2 and 3 accommodate a plurality of radio base stations 4, but only one is shown here. In addition, the exchanges 2 and 3 are provided as exchanges provided alongside a mobile communication control station accommodating a plurality of radio base stations 4,
Although it is often provided as an exchange connected to the mobile communication control station, only the exchange is shown here. In the following description, it is assumed that the switching center 3 performs a communication process with the mobile terminal 6 through the wireless section of the wireless base station 4 as appropriate.

The exchanges 2 and 3 are provided with visitor location registers (VLRs) 2a and 3a, respectively. This visitor location register (VLR) 2
Reference numerals a and 3a denote databases in which storage areas are allocated to memory devices (not shown) provided in the exchanges 2 and 3, for example.

Next, the operation of this embodiment will be described. First, the operation of each unit will be described. FIG. 2 is a diagram for explaining the contents of general subscriber data. FIG.
(A) is a home location register (HLR) device 5
2B, and FIG. 2B shows a general visitor location register (VLR) 2a,
3a shows the subscriber data. FIG. 3 shows a visitor location register (VLR) 2a, 3 corresponding to the present invention.
FIG. 5 is a diagram for explaining the contents of subscriber data in FIG.

In FIG. 1, subscriber data of the mobile terminal 6, which is referred to when the exchange 3 establishes a call connection to the mobile terminal 6, is stored in a home location register (HLR) device 5 in advance. The fetched subscriber data is temporarily stored in visitor location registers (VLR) 2a, 3a installed in the exchanges 2, 3.

The subscriber data referred to in the call connection during the normal operation is centrally managed by the home location register (HLR) device 5. In this case, exchange 2,
In order to quickly perform the call connection process at 3, the exchanges 2 and 3
Visitor location register (VLR) 2a, 3a
The subscriber data of the mobile terminal 6 that sends the location registration sequence signal in the Mobile Assisted handover process (CDMA / soft hand process) is fetched from the home location register (HLR) device 5 and stored. .

Visitor location register (VLR)
Reference numerals 2a and 3a denote databases in which storage areas described later are allocated to memory devices (not shown) provided in the exchanges 2 and 3, respectively.

In FIG. 2A, the subscriber data of a number of mobile terminals 6 are stored in a home location register (H).
LR) is stored in the device 5 in advance. In FIG. 2B, visitor location registers (VLRs) 2a and 3a in the exchanges 2 and 3 move to the service area of the radio base station 4 accommodated by the exchanges 2 and 3, and the line connection is performed in the radio section. Only the subscriber data necessary for the call connection with the mobile terminal 6 is fetched from the home location register (HLR) device 5 and temporarily stored.

As shown in FIG. 2B, the subscriber data of a large number of mobile terminals 6 stored in the home location register (HLR) device 5 includes ESN: electronic serial number,
MIN: mobile terminal identification number (ID), SS: supplementary service, NAME: subscriber name, ADDR: information on subscriber address, and exchanges 2 and 3 provide these information (subscriber data).
, A call connection to the mobile terminal 6 is performed.

In the embodiment of the present invention, as shown in FIG. 3, each subscriber data stored in the visitor location register (VLR) 2a, 3a includes ESN: electronic serial number, MIN: mobile terminal identification number (ID) ), SS: an additional service, and an OS: service option storage area corresponding to the present invention are provided.

In the service option OS storage area, the exchanges 2 and 3 can support the mobile terminal 6 by referring to the information (subscriber data) of the visitor location registers (VLR) 2a and 3a in FIG. Exchange 2,3
Stores a service option OS corresponding to the audio compression rate designated preferentially.

In the example shown in FIG. 1, the exchange 3 first establishes a call connection to the mobile terminal 6 in the service area of the radio base station 4 accommodated therein, but at this time, the predetermined priority is applied. The service option OS of the audio compression rate selected from a plurality of power compression rates to be specified. If the mobile terminal 6 cannot support this service option OS (voice compression rate), the service option corresponding to the voice compression rate that the mobile terminal 6 can support is confirmed and changed in service option negotiation.

As a result of the service negotiation, the exchange 3 determines that the service option OS finally selected.
(Audio compression rate / service option OS number that can be supported by the mobile terminal 6 among a plurality of audio compression rates)
Is stored in a visitor location register (VLR) 3a, and thereafter, when the exchange 3 establishes a call connection to the mobile terminal 6, the service option of the voice compression rate which is applied with the highest priority in advance. Instead of the OS, a service option OS (voice compression rate) stored in the visitor location register (VLR) 3a is specified for the mobile terminal 6. That is, the service option S of the audio compression rate that can be supported by the current mobile terminal 6
O will be changed and set by the service negotiation at the time of the first call connection.

Therefore, even for the mobile terminal 6 that cannot support the voice compression rate specified by the exchange 3 with the highest priority, it is not necessary to negotiate the service option OS at the time of the second or subsequent connection. As a result, the call connection time is shortened, and the processing load on the exchange can be reduced.

Next, the operation corresponding to the present invention will be described in detail. FIG. 4 is a sequence diagram showing a procedure for a call connection between the exchange 3 and the mobile terminal 6 when the mobile terminal 6 receives a call. FIG. 4A shows a sequence of an incoming connection with service option negotiation, and FIG. 4B shows a sequence of an incoming connection without service option negotiation. FIG. 5 is a flowchart showing a processing procedure of the call connection operation of the exchanges 2 and 3 when the mobile terminal 6 receives a call.

In the routine A shown in FIG. 4B and FIG. 5, in the terminating connection, the exchanges 2 and 3 store the subscriber data in the visitor location registers (VLRs) 2a and 3a for a number of mobile terminals 6 to be called. Refer to electronic serial number ESN or mobile terminal identification number (ID) MIN
Is transmitted (step (S)).
1). A service option number indicating which audio compression rate is used is added to the page signal T1.

An example of the correspondence between the service option (SO) number and the audio compression rate is shown in Table 1 below.

[0040]

[Table 1]

In the exchanges 2 and 3, the priority of the audio compression rate (service option OS) to be applied in advance is generally SO3 (8 kbps / SO) shown in (Table 1) in the order of high sound quality and high wireless communication efficiency. Q-CELP), SO
2 (13 kbps / Q-CELP), SO1 (8 kbps
s / EVRC). Therefore, the service options SO on the visitor location registers (VLR) 2a, 3a include SO3 (8 kbp) in (Table 1).
s / Q-CELP) is written as a default value.

When a call arrives at the mobile terminal 6, the exchange 3 refers to the subscriber data of the mobile terminal 6 stored in the visitor location register (VLR) 3a (S
2) A page signal including the electronic serial number ESN or the mobile terminal identification number (ID) MIN and the service option number is transmitted (S3). At the time of the first call connection, the contents of the service option SO are set to S shown in the default (Table 1).
O3 (8 kbps / Q-CELP)
SO3 in this (Table 1) (8 kbps / Q-CELP)
Is sent.

On the other hand, the mobile terminal 6 returns the page response signal T2, but the SO3 (8 kb) shown in (Table 1) is returned.
In the case of the mobile terminal 6 that supports (ps / Q-CELP), the mobile station 6 returns the page response signal T2 to the switching center 3 with the service option specified by the page signal T1. In the exchange 3, the specified service option OS
Is compared with the returned service option OS (S
4, S5, S6).

If the service options OS match in this comparison (S6: Yes), as shown in FIGS. 4 (a), (b) and FIG. 5, after transmitting the speech channel assignment signal T3 to the mobile terminal 6, After exchanging the service connect signal T6 and the service connect complete signal T7 without performing the service option negotiation,
At the voice compression rate corresponding to SO3 (8 kbps / Q-CELP) in (Table 1), the communication state is set (S7,
S8, S9).

Next, the mobile terminal 6 sets SO3 (8 kbps /
Q-CELP) is not described. As shown in FIG. 4A and the routine B in FIG.
If there is no match in the comparison in step (S) 6 (No), the mobile terminal 6 adds SO1 (8 kbps / Q-CEL) as a default service option to the page response signal T2.
P) is added. The exchange 3 recognizes that a service option different from the service option specified by the page signal T1 has been received, and the SO2 (13 kbps / Q-CE) which is given next priority is given.
LP) and transmits a service request signal T4 (S10).

On the other hand, the mobile terminal 6 sets SO2 (13k
If the mobile terminal 6 supports the service response signal T5 including the SO2 (13 kbps / Q-CELP). The exchange 3 recognizes that the service option is the same as that specified by the service request signal T5. Next, the service connect signal T6 and the service connect complete signal T7 are exchanged in the same manner as in the routine A.
2 (13 kbps / Q-CELP). Further, the service option SO storage area of this subscriber data of the visitor location register (VLR) 3a is stored in SO3 (8 kb).
ps / EVRC) to SO2 (13 kbps / Q-CE)
LP) (S11, S12, S13).

If there is no match in step (S) 12 of routine B (No), that is, if mobile terminal 6
2 (13 kbps / Q-CELP), the mobile terminal 6 performs SO1 (8 kbps / Q-CELP) as shown in the routine C of FIG. 4A and FIG.
Is returned in the service response signal T5, the exchange 3 determines that the signal is different from the one specified by the service request signal T4, and the SO1 (8 kbps /
Q-CELP), and transmits the service request signal T4 again.

The mobile terminal 6 is connected to SO1 (8 kbps / Q-C
ELP), this SO1 (8 kbp)
s / Q-CELP) as a service response signal T5, the exchange recognizes that it is the same as that specified by the service request signal T4, and executes the routine A.
Exchange of the service connect signal T6 and the service connect complete signal T7 in the same manner as in the case of
The voice communication state is set at the voice compression rate of SO1 (8 kbps / Q-CELP), and the service option SO storage area of this subscriber data of the visitor location register (VLR) 3a is set to SO3 (8 kbps / E).
VRC) to SO1 (8 kbps / Q-CELP) (S14, S15, S16, S17).

When the mobile terminal 6 receives SO1 (8 kbps / QC)
ELP) is not supported (S16: No),
SO1 (8 kbps / Q) with service response signal T5
-CELP), the service option SO at the audio compression rates of SO1 to SO3 does not all match. That is, assuming that the service options other than the service option SO at the voice compression rates of SO1 to SO3 are supported, the call connection processing is disconnected (S
18).

As described above, in the subsequent incoming connection to the mobile terminal 6, when the exchange 3 transmits the page signal T1, the exchange 3 stores the service option stored in the service option SO storage area of the visitor location register (VLR) 3a. SO (SO1 to SO3) is added, and the service option SO is supported by the mobile terminal 6 by the call connection described above, and the service option OS (SO1 to SO3) specified by the exchange preferentially.
It has been rewritten in 3).

As a result, the service option SO returned by the page response signal T2 always includes the page signal T
This matches the service option SO specified in 1. Therefore, all the call connections are set to the talking state only by exchanging the service connect signal T6 and the service connect complete signal T7 as in the case of the routine A of FIG.

Next, the case where the first call connection is outgoing call will be described. FIG. 6 is a sequence diagram showing a processing procedure at the time of calling at the mobile terminal 6. FIG. 6A shows a sequence of an outgoing connection with a service option negotiation, and FIG. 6B shows a sequence of an outgoing connection without a service option negotiation. FIG. 7 is a flowchart showing the processing procedure of the outgoing connection operation of the exchanges 2 and 3.

In the case of the outgoing connection from the mobile terminal 6 in the routine A of FIG. 6 and FIG. 7 (step (S) 21).
The origination signal T2a is transmitted from the mobile terminal 6 to the exchange 3 (S22), and one of the service options SO (SO1 to SO3) set in the mobile terminal 6 is added to the origination signal T2a. I have.

The exchange 3 sends a speech channel assignment signal T3.
After the communication channel is set by the transmission of the service option SO1, SO2 or SO3, the service option SO set in the service option SO storage area of the visitor location register (VLR) 3a is set.
If (SO1 to SO3) is matched, the communication state is set after exchanging the service connect signal T6 and the service connect complete signal T7 (S23, S24, S23).
S25, S26, S27, S28).

In the routines B and C of FIG. 6A and FIG. 7, when the service option SO is different (S25:
No), as in the case of the incoming call connection, the service request signal T4 and the service response signal T5 are exchanged by specifying the service options SO in accordance with the priority order specified by the exchange 3 until the service options SO match (S29, S30). , S31). As a result, the default service option SO stored in the service option SO storage area of the visitor location register (VLR) 3a is rewritten to the service option that matches the above call connection (S32, S33, S34, S3).
5, S36, S37).

Therefore, in the subsequent incoming connection, the service option OS returned by the page response signal T2
Always match the service option SO specified by the page signal T1. As a result, the call connection is set to the communication state by exchanging the service connect signal T6 and the service connect complete signal T7 as in the routine A.

[0057]

As is apparent from the above description, according to the method for selecting and setting from multi-service options in the digital mobile communication system of the present invention, and the system therefor,
The service options that can be supported by the mobile terminal, confirmed by the result of the negotiation performed by the exchange in the first call connection, can be first specified in the subsequent call connections.

As a result, it is not necessary to negotiate a service option every time a call is connected, so that the call connection time is reduced and the processing load on the exchange can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a method for selecting and setting a multi-service option in a digital mobile communication system according to the present invention and a configuration of the system according to an embodiment.

FIG. 2 is a diagram for explaining the contents of general subscriber data in the embodiment. (A) shows subscriber data of a home location register device, and (b) shows subscriber data of a general visitor location register.

FIG. 3 is a diagram illustrating a configuration of subscriber data in a visitor location register according to the embodiment of the present invention.

FIG. 4 is a sequence diagram illustrating a processing procedure of an operation at the time of an incoming call in the mobile terminal according to the embodiment. (A) shows a sequence of an incoming connection with service option negotiation, and (b) shows a sequence of an incoming connection without service option negotiation.

FIG. 5 is a flowchart showing a processing procedure of an operation at the time of an incoming call in the mobile terminal according to the embodiment.

FIG. 6 is a sequence diagram showing a processing procedure at the time of calling at the mobile terminal in the embodiment. (A) shows a sequence of an outgoing connection with service option negotiation, and (b) shows a sequence of an outgoing connection without service option negotiation.

FIG. 7 is a flowchart showing a processing procedure of an operation at the time of calling at the mobile terminal in the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 mobile communication network 2, 3 exchange 4 radio base station 5 home location register (HLR) device 6 mobile terminal 2a, 3a visitor location register (VLR) T1 page signal T2 page response signal T2a origination signal T3 call channel assignment signal T4 Service request signal T5 Service response signal T6 Service connect signal T7 Service connect complete signal

Claims (11)

(57) [Claims] 1. A method of selecting and setting a multi-service option in a digital mobile communication system for setting a voice compression rate supported by a mobile terminal, comprising the steps of pre-adding subscriber data for each mobile terminal in a visitor location register of an exchange. The first step of setting the service option to be applied with the highest priority, and the service option set in this first step,
The exchange performs the first call connection with the mobile terminal, confirms and stores the service options that the mobile terminal can support at the time of the call connection, and specifies the stored service option at the time of the subsequent call connection. And a method for selecting and setting from multi-service options in a digital mobile communication system. 2. A process for setting a service option storage area in subscriber data for each mobile terminal in a visitor location register of an exchange, and a service option previously applied to the service option storage area with the highest priority. 2. The method according to claim 1, further comprising: setting a multi-service option in the digital mobile communication system. 3. A process of rewriting and storing a service option confirmed in a service negotiation at the time of a first call connection with a mobile terminal in a service option storage area as the second stage, 2. A selection setting from a multi-service option in the digital mobile communication system according to claim 1, further comprising: a process of first specifying a stored service option to perform a call connection when performing a call connection. Method. 4. An exchange comprising a visitor location register for storing a service option selected from a plurality of voice compression rates that can be supported by a mobile terminal, accommodating a plurality of radio base stations and storing subscriber data in a communication network. In a CDMA digital cellular mobile communication system connected to a home location register device as a database, a service option for prioritizing the subscriber data for each mobile terminal in a visitor location register of the exchange is set with the highest priority. A first processing unit that performs the first call connection with the mobile terminal by the service option set by the first processing unit, and confirms a service option that can be supported by the mobile terminal in the call connection. And memorize it for future calls Digital mobile communication systems, characterized in that it comprises a second processing means for specifying the connection time, the. 5. A service for setting a service option storage area in subscriber data for each mobile terminal in a visitor location register of an exchange, and applying the service option storage area to the service option storage area with the highest priority in advance. The digital mobile communication system according to claim 4, wherein an option is set. 6. The service processing apparatus according to claim 1, wherein said second processing means, after setting the service option in said first processing means, stores a service option confirmed in a service negotiation at the time of a first call connection with the mobile terminal in a service option storage area. The digital mobile communication system according to claim 4, wherein the digital mobile communication system is rewritten and stored, and is designated when a call connection with a mobile terminal is performed thereafter. 7. A storage of service options selected from a plurality of audio compression rates in the first processing means,
(I) first specify a service option selected from a plurality of audio compression rates in accordance with the priority order specified by the exchange; (ii) the mobile terminal receives a page signal storing the specified service option; and (iii) If the mobile terminal cannot support the service option notified by the page signal, (iv) a service request signal and a service response until the service option that can be supported by the mobile terminal and a plurality of service options at the exchange match. 5. The digital mobile communication according to claim 4, wherein signals are exchanged, and (v) the service option matched by the exchange is rewritten and stored in a service option storage area for each subscriber data in a visitor location register. system. 8. A service connect signal and a service connect complete signal are exchanged when a service option that can be supported by the mobile terminal matches a plurality of service options in an exchange, and a voice compression rate of the matched service option is exchanged. 8. The digital mobile communication system according to claim 7, wherein the communication state is set to a call state. 9. The mobile station, when all service options supported by the mobile terminal do not match a plurality of service options in the mobile switching center, the mobile switching center disconnects the call connection process. Item 8. The digital mobile communication system according to Item 7. 10. The subscriber data of the visitor location register includes at least an electronic serial number, a mobile terminal identification number, a supplementary service, and a mobile terminal that can support at the time of a call connection for each mobile terminal. A respective area for storing a service option corresponding to a specified voice compression rate is provided, and the exchange fetches the information from a home location register device and refers to the information to perform a call connection to the mobile terminal. The digital mobile communication system according to claim 4. 11. The subscriber data of the home location register device includes an electronic serial number, a mobile terminal identification number, an additional service,
5. The digital mobile communication system according to claim 4, further comprising information of a subscriber name and a subscriber address, and making a call connection to the mobile terminal by referring to the information.