CN103139718B - The method of a kind of PoC time delay optimization process and device - Google Patents
The method of a kind of PoC time delay optimization process and device Download PDFInfo
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Abstract
The invention discloses method and the device of the process of a kind of PoC time delay optimization, directly SIP is sent directly to RNC transmission RAB allocation request message and SGSN to calling UE by SGSN? INVITE asks the steps such as response to shorten the time of RAB foundation and SIP process, also acquiring unit is provided with in SGSN device, identifying unit and transmitting element, obtain called subscriber condition by SGSN device unit and send PoC session right of speech information directly to caller, shorten the time that caller obtains right of speech, thus decrease the time delay that PoC session sets up first, improve the satisfaction rate that user uses.
Description
Technical field
The present invention relates to mobile communication technology field, be specifically related to method and the device of the process of a kind of PoC time delay optimization.
Background technology
PoC(PushtoTalkoverCellular, radio honeycomb PTT) refer to and to carry based on mobile cellular network packet domain, utilize VoIP(VoiceoverIP, ip voice) technology realizes the half-duplex voice business of similar trunking communication, can support session one to one, the function such as one-to-many cluster conversation, state present in real time, group list management.Its main feature is embodied in: user by special PTT(PushToTalk, PTT) button, the right to speak in application session, is obtaining the floor and after being pointed out accordingly, user can start speech.In half-duplex session, a side is when talking, and other members can only answer, and can not talk.
SIP(SessionInitiationProtocol, conversation initialized protocol) be a kind of application layer signaling protocol realizing real time communication in IP based network, can be used for the controlling functions such as the foundation to PoC session, process, termination.
RNC(RadioNetworkController, radio network controller) be UTRAN(UMTSTerrestrialRadioAccessNetwork, UMTS Terrestrial radio access network) an important network element, RNC and core net are by Iu interface inter-link.For providing access control, switching controls, power controls, packet scheduling, system information broadcast, Stochastic accessing and RAB(RadioAccessBearer, RAB), RB(RadioBearer, radio bearer) management, UTRAN safety function, the functions such as database processing and UE location.
SGSN(ServingGPRSSupportingNode, GPRS serving GPRS support node) be the distinctive equipment of packet domain, the connection of RNS and core net is provided.Major function comprises: Network access control (as registration, authentication, mandate etc.); Route Selection and forwarding; Mobile management; Session management (as entered to exhale enforcement paging to what call out); Keep UE(UserEquipment, user terminal) and GPRS(GeneralPacketRadioService, GPRS) logic between network connects; Be responsible for the service data (collection as charge information) of acquisition system and the interface capability etc. with other network elements.
GGSN(GatewayGPRSSupportingNode, GGSN) be the distinctive equipment of packet domain, be connected with SGSN by gn interface, be connected with outer data network by Gi interface, there is provided packet at UMTS(UniversalMobileTelecommunicationsSystem, universal mobile telecommunications system) route between network and external data network and encapsulation.Major function realizes the interface with outer data network; Maintaining routing list, realizes forwarding and the routing function of grouping; Realize the filtration of grouped data and and the interface capability etc. of other network elements.
For grouping user, when each UE start, UE automatically can complete RRC and set up, PS(PacketSwitched, packet switching) territory attachment and complete registration at SGSN, PDP(PacketDataProtocol) foundation of upper style of writing.If now do not have data service, so UE will be in IDLE pattern, wait for caller or be exhaled.
Concerning the UE being in IDLE pattern, if PTT key is pressed in caller, the territory of the PS first session establishment time delay of PoC mainly comprises three aspects: one is RRC setup delay; Two is RAB setup delay (comprising PDP Context initial activation); Three is SIP processing delay.SIP signaling carries out PDP Context again secondary activating after building up can carry out transmitting corresponding session control and media.
From the experience angle of user, the time obtained the floor is shorter, namely session establishment time delay is less, user is more satisfied, for PoC user, require session time delay to be first a not more than important indicator that 1.6 seconds users are satisfactions, therefore, should reduce existing network session establishment time delay as far as possible.
Summary of the invention
Given this, the invention provides method and the device of a kind of PoC time delay optimization process, to reduce the time delay that PoC session is set up, improve the satisfaction rate of user.
In order to reach the object reducing session establishment time delay, the technical solution used in the present invention is: the method for a kind of PoC time delay optimization process, comprises foundation and the SIP process of RAB;
Wherein, the foundation of described RAB is as follows:
SGSN obtains the initial service request message of PoC;
According to the initial service request message of PoC, SGSN sends RAB allocation request message directly to RNC;
Described SIP process is as follows:
SGSN obtains the called UE relevant information and session information registered in PoC server;
SGSN directly sends SIPINVITE request response to calling UE;
Calling UE obtains right of speech.
More specifically, the foundation of RAB also comprises the steps:
Step 201, according to the initial service request message of PoC, obtains grouping initial message type of service and PDP Context initial activation request message;
Step 202, analyzes and judges whether grouping initial message type is PoC service type, if it is performs step 203, if not then general Packet Service type signaling process execution routinely;
Step 203, SGSN sends RAB allocation request message directly to RNC.
Present invention also offers a kind of PoC time delay optimization processing unit in view of achieving the above object, comprising calling/called UE device, for the SGSN device that provides wireless network to be connected with core net and PoC server; Described SGSN device comprises acquiring unit, identifying unit and transmitting element; Wherein, described acquiring unit is used for after RRC has set up, and receives grouping initial message type of service before RAB sets up; Described identifying unit, for judging the initial message type of service that receives whether as PoC service type; Described transmitting element, directly sends RAB allocation request message for SGSN to RNC.
Further, SGSN device also comprises called party information acquiring unit, the INVITE request direct transmitting element of response and right of speech message feedback unit; Wherein, described called party information acquiring unit, for obtaining the called party information of the called UE in PoC server registration, creates the information of called PoC session; The direct transmitting element of INVITE request response, for the log-on message according to PoC server, sends right of speech to calling UE and obtains information; Right of speech message feedback unit, for sending right of speech grant information to PoC server.
Particularly, calling/called UE device comprises PoC service message sending unit and RB sets up receiving element, wherein said PoC service message sending unit, for the Data Identification signaling that sends PTT button and PDP context activation request message; RB sets up receiving element, for receiving the beep-page message from PoC session.
Compared with prior art, the present invention has following beneficial effect: comprise PoC service type and PDP context activation request by the initial directly pass-along message of UE, SGSN sends RAB assignment request information directly to RNC, decreases conventional Packet Service flow process information, shortens the time that RAB sets up; Obtain called subscriber condition by SGSN device unit and send PoC session right of speech information directly to caller, shorten the time that caller obtains right of speech, thus decrease the time delay that PoC session sets up first, improve the satisfaction rate that user uses.
Accompanying drawing explanation
Fig. 1 is the PoC session establishment time delay flow chart first of prior art;
Fig. 2 be embodiment of the present invention PoC first session establishment time RAB optimization process flow chart;
Fig. 3 be embodiment of the present invention PoC first session establishment time caller right of speech optimization process flow chart;
Fig. 4 is embodiment of the present invention PoC session establishment time delay flow chart first;
Fig. 5 is embodiment of the present invention SGSN installation drawing;
Fig. 6 is another embodiment of the present invention SGSN installation drawing;
Fig. 7 is embodiment of the present invention UE structural representation.
Embodiment
For further illustrating the embodiment of the present invention and technical scheme, providing specific embodiment below and being described with reference to the accompanying drawings.
For the time delay that PoC session is set up, RRC setup delay depends on existing fixed network, and the space of optimization is less.RAB setup delay as shown in Figure 1, comprise GMM(GPRSMobilityManagement, GPRS Mobility Management) service request, authentication request, Authentication Response, security mode command, activate PDP Context, the processes such as RAB foundation, carry out necessary optimization process to these processes, can reduce the time delay that RAB sets up.
As shown in Figure 2, the present embodiment is the method for a kind of PoC time delay optimization of the present invention process, comprising:
Step 201:SGSN obtains caller grouping initial message type of service relevant information and PDP Context initial activation message request;
Above-mentioned SGSN obtains the mode of caller blocking message type of service, obtains by the initial service request Message Transmission after completing RRC connection establishment.For distinguishing other business, it is PoC service that UE client identifies this business by the corresponding coding of PTT button transmission.
The acquisition of above-mentioned PDP Context initial activation message, can be carried when initial service request message is initiated by UE terminal, and also independent message can be used after initial service is initiated to send by UE terminal, the embodiment of the present invention is not construed as limiting this.
Step 202: analyze the grouping initial message type judging to obtain;
For the process of PDP Context initial activation, SGSN can receive multiple grouping initial message type after RRC has set up, whether the grouping initial message type received by judgement is PoC service type, if it is perform by step 203, if not then general Packet Service type signaling process execution routinely.
Step 203: send RAB allocation request message;
If PoC service, SGSN then sends the instruction of RAB allocation request message directly to RNC, thus the signaling process such as the authentication reduced performed by conventional signaling and safety.
Further, another embodiment as shown in Figure 3, present invention also offers the method for a kind of PoC caller right of speech time delay optimization process, mainly shortens SIP processing delay, comprising:
Step 301: obtain the called UE session information server registration user;
The acquisition of the information of above-mentioned called UE user conversation, obtains by arranging acquiring unit at SGSN.SGSN user profile acquiring unit, that can be stored at presence server by gn interface or self defined interface acquisition called UE presents information, and the PoC service of registered user is arranged, if user answer pattern is automatic-answering back device setting, manual answering setting or interruption-free setting, thus unified management is carried out in presenting information and replying setting of registered user.
Step 302:SGSN directly sends SIPINVITE request response to calling UE;
Information and response configuration information is presented according to the user that above-mentioned SGSN obtains, SGSN can directly reply the SIPINVITE request message that calling UE sends, thus make SIPINVITE need not by arriving PoC server after multiple nodes such as SGSN, GGSN, sip agent, make response through PoC server according to the current state information of called subscriber again, and then decrease time delay for the acquisition of caller right of speech.
Step 303: send right of speech feedback message to PoC server;
After SGSN makes right of speech response message to SIPINVITE request message, right of speech control information should be fed back to PoC server, PoC server upgrades its internal information, stores current right of speech information, and initiates paging to called UE.
By above-mentioned implementation method, reduce PoC session setup delay to a certain extent, its overall latency Optimizing Flow as shown in Figure 4.Compare Fig. 1, time delay minimizing comprises two aspects: one is that RAB setup delay reduces, and two is that SIP processing delay reduces, thus reduces the overall latency obtaining caller right of speech.
As shown in Figure 5, the embodiment of the present invention additionally provides a kind of SGSN device, comprising:
Acquiring unit 501, for obtaining the initial message of calling subscriber;
Analysis and processing unit 502, for checking whether the initial message type of service of acquisition is PoC service;
Transmitting element 503, for the grouping to be initial message type of service be PoC service, sends the order of RAB allocation request message.
Further, as shown in Figure 6, the embodiment of the present invention additionally provides another kind of SGSN device, comprising:
Called party information acquiring unit 601, for obtaining the called party information of called UE, answer-mode and state from PoC server and presence server, creates the information of called PoC session.
The direct transmitting element 602 of INVITE request response, according to the called subscriber answer pattern obtained and state, directly sends SIP200OK or SIP487 through RNC to caller and refuses request message.
Right of speech message feedback unit 603, for sending the right of speech information of current sessions to PoC server, PoC server stores according to the feedback information received and upgrades called right of speech state.
As shown in Figure 7, the embodiment of the present invention additionally provides a kind of UE terminal, comprising:
PoC service message sending unit, for sending corresponding Data Identification signaling and PDP context activation request message;
RB sets up receiving element, for receiving the RAB instruction message from SGSN;
The above is the preferred embodiments of the present invention, technical staff can be helped to understand thinking and countermeasure of the present invention, be not limited to the present invention.When not deviating from spirit of the present invention and essence thereof, those skilled in the art can carry out various amendment and distortion to the present invention, but these change accordingly and distortion all belongs to claims of the present invention.
Claims (4)
1. a method for PoC time delay optimization process, is characterized in that: the foundation and the SIP process that comprise RAB;
Wherein, the foundation of described RAB is as follows:
SGSN obtains the initial service request message of PoC;
According to the initial service request message of PoC, SGSN sends RAB allocation request message directly to RNC, comprises the steps:
Step 201, according to the initial service request message of PoC, obtains grouping initial message type of service and PDP Context initial activation request message;
Step 202, analyzes and judges whether grouping initial message type is PoC service type, if it is performs step 203, if not then general Packet Service type signaling process execution routinely;
Step 203, SGSN sends RAB allocation request message directly to RNC;
Described SIP process is as follows:
SGSN obtains the called UE relevant information and session information registered in PoC server;
SGSN directly sends SIPINVITE request response to calling UE;
Calling UE obtains right of speech.
2. the method for a kind of PoC time delay optimization process according to claim 1, it is characterized in that: when described SGSN directly sends SIPINVITE request response to calling UE, right of speech control information is fed back to PoC server by SGSN, and PoC server upgrades internal information and stores current right of speech control information.
3. a PoC time delay optimization processing unit, comprises calling/called UE device, for the SGSN device that provides wireless network to be connected with core net and PoC server, it is characterized in that: described SGSN device comprises acquiring unit, identifying unit and transmitting element; Wherein, described acquiring unit is used for after RRC has set up, and receives grouping initial message type of service before RAB sets up; Described identifying unit, for judging the initial message type of service that receives whether as PoC service type; Described transmitting element, when the initial message type of service judging to receive for described identifying unit is PoC service type, SGSN directly sends RAB allocation request message to RNC;
Described SGSN device also comprises called party information acquiring unit, the INVITE request direct transmitting element of response and right of speech message feedback unit; Wherein, described called party information acquiring unit, for obtaining the called party information of the called UE in PoC server registration, creates the information of called PoC session; The direct transmitting element of INVITE request response, for the log-on message according to PoC server, sends right of speech to calling UE and obtains information; Right of speech message feedback unit, for sending right of speech grant information to PoC server.
4. a kind of PoC time delay optimization processing unit according to claim 3, it is characterized in that: described calling/called UE device comprises PoC service message sending unit and RB sets up receiving element, wherein said PoC service message sending unit, for sending Data Identification signaling and PDP context activation request message to PTT button; RB sets up receiving element, for receiving the beep-page message from PoC session.
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| CN110753360B (en) * | 2019-10-17 | 2022-12-02 | 中国联合网络通信集团有限公司 | Time delay optimization method and device |
| CN112787876B (en) * | 2019-11-07 | 2022-10-18 | 成都鼎桥通信技术有限公司 | Performance evaluation method and device of session initiation protocol server |
| RU2755529C1 (en) * | 2021-02-01 | 2021-09-17 | Даурен Муратович Айдарханов | Method for establishing session of group packet voice communication over data transmission networks |
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