CN101790131A - MEID supporting method and system for digital trunk terminal - Google Patents

MEID supporting method and system for digital trunk terminal Download PDF

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CN101790131A
CN101790131A CN201010111547A CN201010111547A CN101790131A CN 101790131 A CN101790131 A CN 101790131A CN 201010111547 A CN201010111547 A CN 201010111547A CN 201010111547 A CN201010111547 A CN 201010111547A CN 101790131 A CN101790131 A CN 101790131A
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plcm
field
meid
long code
base station
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CN101790131B (en
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陈少珠
杨辉
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Beijing Zte Gundam Communication Technology Co ltd
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ZTE Corp
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Abstract

本发明公开了一种数字集群终端支持MEID的方法及系统,上述方法包括以下步骤:数字集群终端向基站发送携带有支持MEID指示信息的消息;数字集群终端将来自于基站的扩展信道指派消息ECAM进行解码得到唯一的共用长码掩码PLCM字段;以及数字集群终端根据PLCM字段计算获取长码掩码,并设置为信道的长码掩码。根据本发明提供的技术方案,可以保证根据ESN生成的长码掩码唯一,使得数字集群终端支持MEID。

Figure 201010111547

The invention discloses a method and system for a digital trunking terminal to support MEID. The method includes the following steps: the digital trunking terminal sends a message carrying MEID support indication information to the base station; the digital trunking terminal sends the extended channel assignment message ECAM from the base station Decoding is performed to obtain the unique common long code mask PLCM field; and the digital trunking terminal calculates and obtains the long code mask according to the PLCM field, and sets it as the long code mask of the channel. According to the technical solution provided by the invention, the uniqueness of the long code mask generated according to the ESN can be guaranteed, so that the digital trunking terminal supports MEID.

Figure 201010111547

Description

Digital packet terminal is supported the method and system of MEID
Technical field
The present invention relates to the communications field, support the method and system of MEID in particular to a kind of digital packet terminal.
Background technology
Digital aggregated communication system is an important branch of mobile communcations system, is a kind of mobile communcations system that is applied to group's dispatch control communication.The Digital Clustering business features is to adopt the mode of one-to-many, i.e. transmit leg user, a plurality of recipient users.For conserve system resources, be provided with forward shared channel and reversed shared channel, promptly a plurality of users share a forward channel or backward channel.
At present, in digital aggregated communication system, terminal is used mobile device identification code (Mobile Equipment Identifier, abbreviate MEID as) when sticking into row communication, for shared channel and independent channel, system all generates the long code of plcm_32 field according to group message, and is sent to terminal, behind the decoding terminals by calculating Long Code Mask and being provided with.
Yet, when terminal uses MEID to stick into row communication, be to generate a pseudo-ESN (can represent) by algorithm in fact, and generate the PLCM of 32bit based on this puppet ESN with p_ESN by the MEID number.But have a problem, generate the p_ESN of 32bit by the MEID of 56bit, this conversion is not man-to-man relation, but many-to-one relation.When the p_ESN that generates as different MEID is identical, can cause the problem of long code collision.
Hence one can see that, in the Digital Clustering communication, can't guarantee the uniqueness according to the Long Code Mask of ESN generation.This will cause the digital packet terminal conflict, and failure is set up in communication.
Summary of the invention
At correlation technique in the Digital Clustering communication, can't guarantee the problem of the uniqueness of the Long Code Mask that generates according to ESN, main purpose of the present invention is to provide a kind of and supports the method and system of MEID based on the terminal of Digital Clustering, one of to address the above problem at least.
According to an aspect of the present invention, provide a kind of digital packet terminal to support the method for MEID.
Support the method for mobile device identification code MEID may further comprise the steps according to digital packet terminal of the present invention: digital packet terminal sends to the base station and carries the message of supporting the MEID indication information; The extended channel assignment messages ECAM that digital packet terminal will come from the base station decodes and obtains unique shared Long Code Mask PLCM field; And digital packet terminal calculates according to the PLCM field and obtains Long Code Mask, and is set to the Long Code Mask of channel.
According to a further aspect in the invention, provide a kind of digital packet terminal to support the system of MEID.
Support the system of mobile device identification code MEID to comprise according to digital packet terminal of the present invention: digital packet terminal with lower device, be used for sending the message that carries support MEID indication information to the base station, the extended channel assignment messages ECAM that will come from the base station decodes and obtains unique shared Long Code Mask PLCM field, and calculates the Long Code Mask that obtains Long Code Mask and be set to channel according to the PLCM field; And the base station, be used to receive the message of supporting the MEID indication information that carries that comes from terminal, send ECAM to terminal.
By the present invention, the extended channel assignment messages (ECAM) of supporting the digital packet terminal of MEID will come from the base station is decoded and is obtained unique shared Long Code Mask (PLCM) field, and calculate according to the PLCM field and to obtain Long Code Mask, and this Long Code Mask is set.Solve correlation technique in the Digital Clustering communication, can't guarantee the problem of the uniqueness of the Long Code Mask that generates according to ESN, and then can guarantee that the Long Code Mask that generates according to ESN is unique, made digital packet terminal support MEID.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is a schematic flow sheet of setting up Traffic Channel according to the caller of correlation technique;
Fig. 2 is the called schematic flow sheet of setting up Traffic Channel according to correlation technique;
Fig. 3 is a structured flowchart of supporting the system of MEID according to the digital packet terminal of the embodiment of the invention;
Fig. 4 is that digital packet terminal is supported the structured flowchart of the system of MEID according to the preferred embodiment of the invention;
Fig. 5 is a flow chart of supporting the method for MEID according to the digital packet terminal of the embodiment of the invention;
Fig. 6 is the flow chart that sends call message according to the terminal of the embodiment of the invention;
Fig. 7 is the flow chart according to the terminal answer group page response of the embodiment of the invention;
Fig. 8 is the flow chart according to the terminal processes ECAM message of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
According to the embodiment of the invention, at first provide a kind of digital packet terminal to support the system of MEID.
Fig. 3 is a structured flowchart of supporting the system of MEID according to the digital packet terminal of the embodiment of the invention.As shown in Figure 3, this system comprises with lower device: digital packet terminal 1 and base station 2.
Digital packet terminal 1, be used for sending the message that carries support MEID indication information to the base station, the extended channel assignment messages ECAM that will come from the base station decodes and obtains unique shared Long Code Mask PLCM field, and calculating is obtained Long Code Mask and this Long Code Mask is set according to the PLCM field;
Base station 2 is used to receive the message of supporting the MEID indication information that carries that comes from terminal, sends ECAM to terminal.
In said system, the ECAM that supports the digital packet terminal of MEID will come from the base station decodes and obtains unique shared Long Code Mask PLCM field, and the length of this PLCM field can guarantee the uniqueness of this field.Thereby in the Digital Clustering communication, can guarantee uniqueness according to the Long Code Mask of ESN generation, make digital packet terminal support MEID.
Preferably, as shown in Figure 4, above-mentioned digital packet terminal one of comprises with lower device at least: first dispensing device 10, be used for sending call message to the base station, and wherein, call message carries the indication information of supporting MEID; Second dispensing device 12 is used for after receiving the group paging, and to base station transmission group page-response message, wherein, the group page-response message carries the indication information of supporting MEID.
Promptly can whether support MEID by sending this digital packet terminal of call message informing base station, also can whether support MEID by this digital packet terminal of transmission group page-response message informing base station at digital packet terminal.
In specific implementation process, for the situation of terminal caller, first dispensing device 10 carries the indicating bit that this terminal is supported MEID in call message, and this call message is sent to the base station.
For example, the call message field can be referring to table 1.
Table 1
????...... ???......
??REV_FCH_GATING_REQ ??1bit
??MEID_Support_indicator ??1bit
As shown in Table 1, if this terminal is not supported MEID, the value of MEID Support indicator field is 0; If this terminal is supported MEID, the value of MEID Support indicator field is 1.
In specific implementation process,, when terminal receives after group id (Group Identifier the abbreviates GID as) paging answer group page-response message, carry this terminal of sign and whether support the MEID indicating bit for terminal called situation.
For example, group page-response message field can be referring to table 2.
Table 2
??...... ??......
??MEID_Support_indicator ??1bit
As shown in Table 2, if this terminal is not supported MEID, then the field of MEID Support indicator is 0; If this terminal is supported MEID, then the field of MEID Support indicator is 1.
Preferably, digital packet terminal may further include with lower device: first determines device 14, is used for determining to exist the PLCM identification field according to the length of ECAM, and whether the value representation of this field exists the PLCM field; Second determines device 16, is used for determining to exist the PLCM field according to the value of PLCM identification field; And decoding device 18, be used for ECAM decoded and obtain the PLCM field.
In specific implementation process, the base station judges according to the value of MEID Supportindicator in the terminal call message whether terminal supports that MEID issues ECAM, if then the base station sends ECAM to digital packet terminal, digital packet terminal receives after the ECAM, and ECAM is decoded.
For example, the ECAM field can be referring to table 3.
Table 3
??...... ??......
??PLCM_TYPE_INCL ??1bit
??PLCM_TYPE ??0?or?4bit
??...... ??......
??PLCM_32 ??0?or?32bit
??PLCM_39_INCL ??0?or?1bit
??PLCM_39 ??0?or?39bit
??RESERVED ??0-7bit
Wherein, the base station can increase field: PLCM_39_INCL (being the PLCM identification field), PLCM_39 (being above-mentioned PLCM field) in ECAM.
In specific implementation process, digital packet terminal receives after the ECAM, mainly comprises following processing:
(1) digital packet terminal has judged whether the PLCM_39_INCL field according to length, if having, and execution in step (2); If do not have, then do not understand this field, jump to (4).
(2) the PLCM_39_INCL field is obtained in decoding, if this field value is 1, carries out (3); If this field value is 0, carry out (4).
(3) the PLCM_39 field is obtained in decoding.
(4) decoding finishes.
Preferably, base station 2 also is used for when current type of call is individual calling, calculates according to user profile and obtains a cover PLCM, and the length of this PLCM field is 39 bits, uses in forward direction and backward channel.
Yet, when terminal uses MEID to stick into row communication, be to generate a pseudo-ESN (can represent) by algorithm in fact, and carry out long code with this puppet ESN and calculate with p_ESN by the MEID number.The PLCM of 39bit can guarantee uniqueness, the promptly different Long Code Mask differences that the user generated.
Preferably, base station 2, also be used for when current type of call is the enhanced group calling, calculate according to group information and obtain a cover PLCM, wherein, the length of this PLCM field is 32 bits, use and is calculated according to user profile and to be obtained another set of PLCM in forward channel, wherein, the length of this PLCM field is 39 bits, uses in backward channel.
In specific implementation process, channel is shared during owing to the digital cluster system group calling, and forward direction uses different Long Code Masks with backward channel, and two cover long codes (being above-mentioned PLCM) must be arranged.For open trunking architecture (Global open Trunking Architechture, abbreviate GoTa as) group system, the enhanced group calling is that forward channel is shared the pattern that backward channel exclusively enjoys, the forward direction long code is based on group information calculating, and 32bit can guarantee the uniqueness of long code; Oppositely long code is based on that user profile calculates, and must use the long code of 39bit could guarantee the uniqueness of Long Code Mask when using MEID as identifying user information.
In addition, when the current type of call of digital cluster system was individual calling, because the channel of individual calling is monopolized, the long code that preceding backward channel uses all is based on user profile and calculates, and was the same with voice under this situation, the same set of long code of preceding reverse use.For MEID user, must use the 39bit long code could guarantee the uniqueness of Long Code Mask.
According to the embodiment of the invention, also provide a kind of digital packet terminal to support the method for MEID.
Fig. 5 is a flow chart of supporting the method for MEID according to the digital packet terminal of the embodiment of the invention.As shown in Figure 5, this method mainly comprises following processing (step S502-step S506):
Step S502: digital packet terminal sends to the base station and carries the message of supporting the MEID indication information;
Step S504: the extended channel assignment messages ECAM that digital packet terminal will come from the base station decodes and obtains unique PLCM field; And
Step S506: digital packet terminal calculates according to the PLCM field and obtains Long Code Mask, and this Long Code Mask is set.
In said method, the ECAM that supports the digital packet terminal of MEID will come from the base station decodes and obtains unique shared Long Code Mask PLCM field, and the length of this PLCM field can guarantee the uniqueness of this field.Thereby in the Digital Clustering communication, can guarantee uniqueness according to the Long Code Mask of ESN generation, make digital packet terminal support MEID.
Preferably, in step S502, digital packet terminal sends by one of following mode and carries the message of whether supporting the MEID indication information:
First kind of mode: digital packet terminal sends call message to the base station, and wherein, call message carries the indication information of supporting MEID; Adopt the implementation process of this mode specifically can be referring to Fig. 6.
Fig. 6 is the flow chart that sends call message according to the terminal of the embodiment of the invention.As shown in Figure 6, this flow process mainly comprises following processing (step S602-step S608):
Step S602: user key-press makes a call, and UI passes to protocol layer with incident;
Step S604: structure call message.
Wherein, in call message, if terminal is supported MEID, the MEID_Support_indicator indicating bit is set to 1, otherwise, be set to 0,
Step S606: this field is packed in the code stream of call message into.
Wherein, above-mentioned call message code stream includes but not limited to binary code stream.
Step S608: terminal sends above-mentioned call message.
The second way: digital packet terminal is after receiving the group paging, and to base station transmission group page-response message, wherein, the group page-response message carries the indication information of supporting MEID.Adopt the implementation process of this mode specifically can be referring to Fig. 7.Fig. 7 is called with the user to be that the page response step is recalled in the example description.
Fig. 7 is the flow chart according to the terminal answer group page response of the embodiment of the invention.As shown in Figure 7, this flow process mainly comprises following processing (step S702-step S708):
Step S702: terminal is at the beep-page message of paging channel receiver address coupling;
Step S704: terminal constructions page-response message;
Wherein,, then whether support that according to terminal MEID is provided with MEID_Support_indicator if above-mentioned beep-page message is the GID beep-page message, if support that then MEID_Support_indicator is set to 1, otherwise, be set to 0,
Step S706: above-mentioned field is packed in the page-response message code stream;
Step S708: terminal transmission group page-response message.
Can get thus, in call message or group page-response message, carry the field of whether supporting MEID, can make the base station determine to support the terminal of MEID, thereby in ECAM, carry unique PLCM field, wherein, the length of this PLCM field can guarantee the uniqueness of this field.
Preferably, above-mentioned steps S504 may further include following processing:
(1) digital packet terminal determines to exist the PLCM identification field according to the length of ECAM;
(2) digital packet terminal determines to exist the PLCM field according to the value of PLCM identification field; And
(3) digital packet terminal is decoded to ECAM and is obtained the PLCM field.
Below in conjunction with Fig. 8 above-mentioned processing procedure is described.
Fig. 8 is the flow chart according to the terminal processes ECAM message of the embodiment of the invention.As shown in Figure 8, this flow process mainly comprises following processing (step S802-step S810):
Step S802: terminal receives ECAM message;
In specific implementation process, system rises according to terminal and exhales or the information of page-response message judges whether terminal supports MEID, issues long code (being ECAM message) to terminal.
Step S804: terminal is decoded after receiving ECAM message, and binary code stream is resolved to each field;
Step S806: terminal is calculated Long Code Mask according to the field that ECAM resolves;
Step S808: terminal is provided with Long Code Mask;
Step S810: terminal receives forward data, oppositely sends previous video frames.
Preferably, when current type of call is individual calling, guarantee that in the following manner the PLCM field is unique: use same set of PLCM in forward direction and the backward channel, wherein, this PLCM is for calculating the long code of obtaining based on user profile, and this long code length is 39 bits.
Preferably, when current type of call is the enhanced group calling, guarantee that in the following manner the PLCM field is unique: use different PLCM in forward direction and the backward channel, wherein, the PLCM that uses in the forward channel is for calculating the long code of obtaining based on group information, this long code length is 32 bits, and the PLCM that uses in the backward channel is for calculating the long code of obtaining based on user profile, and this long code length is 39 bits.
In specific implementation process, step S806 and step S808 mainly comprise following three kinds of processing modes:
(1) if current type of call is an individual calling, if system has issued PLCM_39, then calculate Long Code Mask according to PLCM_39, and be set to forward direction and reverse Long Code Mask (oppositely using with overlapping long code before the individual calling), otherwise, Long Code Mask is set according to original mode (calculating Long Code Mask) according to ESN.
(2) if current type of call is the enhanced group calling, terminal will be calculated the forward direction Long Code Mask according to the PLCM_32 that receives, be set to SRCH; If system has issued PLCM_39, then calculate reverse Long Code Mask according to PLCM_39, be set to backward channel, otherwise, according to original mode (calculating reverse Long Code Mask) reverse Long Code Mask is set according to ESN.
(3) if current type of call is a traditional group call, reverse Long Code Mask before the PLCM_32 that terminal issues according to system calculates and is provided with.
In specific implementation process, in the traditional group call, adopt the prior art processing mode to generate PLCM_32, promptly generate PLCM_32 according to group information.Because this scheme does not generate PLCM_32 according to ESN, thereby the uniqueness of the Long Code Mask that obtains can be guaranteed, thereby the long code collision problem can not be caused.
In sum, by the foregoing description provided by the invention, provide a kind of digital packet terminal to support the scheme of MEID.In digital cluster system, for the channel of monopolizing, long code is based on that user profile calculates, and must use the 39bit long code could guarantee the uniqueness of Long Code Mask.For the channel of sharing, long code is based on that group information calculates, and can use the 32bit long code can guarantee the uniqueness of Long Code Mask.Such scheme has solved and has also lacked a kind of problem that solves the scheme of long code collision in the Digital Clustering communication in the correlation technique, and then can be so that digital packet terminal is supported MEID.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1.一种数字集群终端支持移动设备识别码MEID的方法,其特征在于,包括以下步骤:1. a kind of digital trunking terminal supports the method for mobile equipment identification code MEID, is characterized in that, comprises the following steps: 数字集群终端向基站发送携带有支持MEID指示信息的消息;The digital trunking terminal sends a message carrying support MEID indication information to the base station; 所述数字集群终端将来自于所述基站的扩展信道指派消息ECAM进行解码得到唯一的共用长码掩码PLCM字段;以及The digital trunking terminal decodes the extended channel assignment message ECAM from the base station to obtain a unique shared long code mask PLCM field; and 所述数字集群终端根据所述PLCM字段计算获取长码掩码,并设置为信道的长码掩码。The digital trunking terminal calculates and acquires the long code mask according to the PLCM field, and sets it as the long code mask of the channel. 2.根据权利要求1所述的方法,其特征在于,所述数字集群终端通过以下至少之一方式发送携带有支持MEID指示信息的消息:2. The method according to claim 1, wherein the digital trunking terminal sends the message carrying the MEID support indication information in at least one of the following ways: 所述数字集群终端向所述基站发送起呼消息,其中,所述起呼消息携带有支持MEID的指示信息;The digital trunking terminal sends an origination message to the base station, wherein the origination message carries indication information supporting MEID; 所述数字集群终端在接收到组寻呼后,向所述基站发送组寻呼响应消息,其中,所述组寻呼响应消息携带有支持MEID的指示信息。After receiving the group paging, the digital trunking terminal sends a group paging response message to the base station, wherein the group paging response message carries indication information supporting MEID. 3.根据权利要求1所述的方法,其特征在于,所述数字集群终端将所述ECAM进行解码得到所述唯一的PLCM字段包括以下步骤:3. method according to claim 1, is characterized in that, described digital trunking terminal decodes described ECAM and obtains described unique PLCM field and comprises the following steps: 所述数字集群终端根据所述ECAM的长度确定存在PLCM标识字段;The digital trunking terminal determines that there is a PLCM identification field according to the length of the ECAM; 所述数字集群终端根据所述PLCM标识字段的值确定存在所述PLCM字段;以及The digital trunking terminal determines that the PLCM field exists according to the value of the PLCM identification field; and 所述数字集群终端对所述ECAM进行解码获取所述PLCM字段。The digital trunking terminal decodes the ECAM to obtain the PLCM field. 4.根据权利要求1至3中任一项所述的方法,其特征在于,在当前呼叫类型为单呼时,通过以下方式保证PLCM字段唯一:前向与反向信道中使用同一套PLCM,其中,该PLCM为基于用户信息计算获取的长码,该长码长度为39比特。4. The method according to any one of claims 1 to 3, wherein, when the current call type is a single call, the PLCM field is guaranteed to be unique in the following manner: use the same set of PLCM in the forward and reverse channels, Wherein, the PLCM is a long code calculated and obtained based on user information, and the length of the long code is 39 bits. 5.根据权利要求1至3中任一项所述的方法,其特征在于,在当前呼叫类型为增强式组呼时,通过以下方式保证PLCM字段唯一:前向与反向信道中使用不同的PLCM,其中,前向信道中使用的PLCM为基于群组信息计算获取的长码,该长码长度为32比特,反向信道中使用的PLCM为基于用户信息计算获取的长码,该长码长度为39比特。5. The method according to any one of claims 1 to 3, wherein when the current call type is an enhanced group call, the PLCM field is guaranteed to be unique in the following manner: using different PLCM, wherein, the PLCM used in the forward channel is a long code calculated and obtained based on group information, and the length of the long code is 32 bits, and the PLCM used in the reverse channel is a long code obtained based on user information. The long code The length is 39 bits. 6.一种数字集群终端支持移动设备识别码MEID的系统,其特征在于,包括以下装置:6. A system in which a digital trunking terminal supports a mobile equipment identification code MEID, is characterized in that it comprises the following devices: 数字集群终端,用于向基站发送携带有支持MEID指示信息的消息,将来自于所述基站的扩展信道指派消息ECAM进行解码得到唯一的共用长码掩码PLCM字段,并根据所述PLCM字段计算获取长码掩码以及设置为信道的长码掩码;以及The digital trunking terminal is used to send a message carrying MEID support indication information to the base station, decode the extended channel assignment message ECAM from the base station to obtain a unique shared long code mask PLCM field, and calculate according to the PLCM field Get the long code mask and set it as the long code mask of the channel; and 所述基站,用于接收来自于所述终端的携带有支持MEID指示信息的消息,向所述终端发送所述ECAM。The base station is configured to receive the message carrying the MEID support indication information from the terminal, and send the ECAM to the terminal. 7.根据权利要求6所述的系统,其特征在于,所述数字集群终端包括以下装置至少之一:7. The system according to claim 6, wherein the digital trunking terminal comprises at least one of the following devices: 第一发送装置,用于向所述基站发送起呼消息,其中,所述起呼消息携带有支持MEID的指示信息;The first sending device is configured to send a calling message to the base station, wherein the calling message carries indication information supporting MEID; 第二发送装置,用于在接收到组寻呼后,向所述基站发送组寻呼响应消息,其中,所述组寻呼响应消息携带有支持MEID的指示信息。The second sending device is configured to send a group paging response message to the base station after receiving the group paging, wherein the group paging response message carries indication information supporting MEID. 8.根据权利要求6所述的系统,其特征在于,所述数字集群终端包括以下装置:8. The system according to claim 6, wherein the digital trunking terminal comprises the following devices: 第一确定装置,用于根据所述ECAM的长度确定存在PLCM标识字段;The first determining means is used to determine the existence of the PLCM identification field according to the length of the ECAM; 第二确定装置,用于根据所述PLCM标识字段的值确定存在所述PLCM字段;以及The second determining means is used to determine that the PLCM field exists according to the value of the PLCM identification field; and 解码装置,用于对所述ECAM进行解码获取所述PLCM字段。The decoding device is configured to decode the ECAM to obtain the PLCM field. 9.根据权利要求6至8中任一项所述的系统,其特征在于,所述基站,还用于在当前呼叫类型为单呼时,根据用户信息计算获取一套PLCM,该PLCM字段的长度为39比特,使用在前向与反向信道中。9. The system according to any one of claims 6 to 8, wherein the base station is further configured to calculate and obtain a set of PLCM according to user information when the current call type is a single call, and the PLCM field The length is 39 bits and is used in the forward and reverse channels. 10.根据权利要求6至8中任一项所述的系统,其特征在于,所述基站,还用于在当前呼叫类型为增强式组呼时,根据群组信息计算获取一套PLCM,其中,该PLCM字段的长度为32比特,使用在前向信道中,并根据用户信息计算获取另一套PLCM,其中,该PLCM字段的长度为39比特,使用在反向信道中。10. The system according to any one of claims 6 to 8, wherein the base station is further configured to calculate and obtain a set of PLCM according to group information when the current call type is an enhanced group call, wherein , the length of the PLCM field is 32 bits and is used in the forward channel, and another set of PLCM is calculated and obtained according to user information, wherein the length of the PLCM field is 39 bits and is used in the reverse channel.
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