CN101938707B - Method and device for optimizing push to talk time delay - Google Patents
Method and device for optimizing push to talk time delay Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for optimizing push to talk time delay, wherein the method for optimizing the optimizing push to talk time delay comprises the following steps of: acquiring called paging related information and push to talk conversation information; and sending a paging message containing the push to talk conversation information to a called party indicated by the called paging related information. The invention enables MT (Mobile Terminated) UE (User Equipment) to enter a Right_to_Listen state in advance by carrying PoC (Push to Talk overCellular) service conversation related information in the paging message sent to the MT UE on a GPRS (General Packet Radio Service) supporting node, thereby reducing the time delay difference of the MT UE entering the Right_to_Listen state and MO (Mobile Originated) entering a Right_to_Speak state and then reducing the initial establishment time delay of a PoC conversation.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method and apparatus of optimizing the PTT time delay.
Background technology
Based on Internet protocol (Internetwork Protocol, IP) conversation initialized protocol (SessionInitiation Protocol, SIP) be the agreement of application layer, can be used for PTT (Push to Talk overCellular, PoC) control functions such as session execution foundation, modification, termination.
As shown in Figure 1, the control of cluster session service PoC just is being based on the Session Initiation Protocol realization.PoC session is set up needs caller (Mobile Originated, MO) subscriber equipment (User Equipment, UE) use SIP to invite (Invite) message to called (Mobile Terminated, MT) UE initiates a session request, this SIP Invite message bearing PoC session relevant information is carried out the SIP process; Calling UE receives SIP asks successfully (200OK) response to know that PoC session is successfully accepted.
Universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) in, core net (Core Network, CN) need be by call signaling with called (MobileTerminated, MT) exhale from holding state, can control the transmission of the mutual and business datum of signaling then.(Radio Network Controller RNC) sends paging (Paging) message to terminal called and exhales from holding state called to be specifically as follows radio network controller in the network.The RNC of above-mentioned transmission message related to calls be specifically as follows gateway GPRS supporting node (GGSN) (GatewayGeneral Packet Radio Service Supporting Node, GGSN); This Paging message is created after receiving the called paging relevant information that POC server sends by GGSN.
The packet domain session is set up process and is comprised: Radio Resource control (Radio Resource Control, RRC) (General Packet Radio Service Attach is adhered in connection foundation, GPRS, GPRSAttach), block data protocol context (PDP Context) activates, (Multimedia Broadcast Multicast Service MBMS) carries processes such as installation process, PDP secondary activating in the multimedia broadcast multicast service; Set up the Cheng Qian in the packet domain session, calling UE also has the button processing delay.Foundation for the PoC session of packet domain, at first needing PDP Context activation is that the transmission of SIP signaling is ready to transfer resource, then PDP Context secondary activating process be the PoC session business normally put forward service quality (Quality of Service, QoS) controlling mechanism.For the UE of IDLE attitude standby in the PoC group, when the beep-page message that receives from network side.
From the time delay angle, the time that MO enters right to speak (Right_To_Speak) state to be needed is approximately 1660ms, and MT enters and has the right to listen (Right_To_Listen) state to need about 1170ms.Above-mentioned MO enters the time of Right_To_Speak state and time that MT enters the Right_To_Listen state might not be accurate, and the confirmable MO of being enters the Right_To_Speak state after MT enters the Right_To_Listen state.
The inventor finds in realizing process of the present invention: enter the time delay of Right_To_Speak state because MT enters the time delay of Right_To_Listen state less than MO, thereby cause the initial setup delay of PoC session very big.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of optimizing the PTT time delay.
The method embodiment of optimization PTT time delay provided by the present invention can be achieved through the following technical solutions:
Obtain called paging relevant information and PTT session information;
The beep-page message that comprises described PTT session information to the called transmission of described called paging relevant information indication.
The embodiment of the invention also provides a kind of gateway GPRS supporting node (GGSN), comprising:
Acquiring unit is used for obtaining called paging relevant information and PTT session information;
The beep-page message creating unit is used for creating the beep-page message that includes the PTT session information;
Transmitting element is used for comprising to the called transmission of described called paging relevant information indication the beep-page message of described PTT session information.
The embodiment of the invention also provides a kind of terminal, comprising:
The beep-page message receiving element is used for receiving the beep-page message that comprises the PTT session information from gateway GPRS supporting node (GGSN);
The beep-page message resolution unit is used for resolving described beep-page message and obtains the PTT session information;
The state switch unit is used for entering the listen state of having the right according to described PTT session information.
Technique scheme has following beneficial effect: by carrying the PoC service session related information in the beep-page message that sends to MT UE at GPRS Support Node, make MT UE can enter the Right_To_Listen state in advance, MT UE enters the Right_To_Listen state and MO enters the delay inequality of Right_To_Speak state thereby reduced, and then has reduced the initial setup delay of PoC session.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 sets up schematic flow sheet for the prior art PoC session;
Fig. 2 embodiment of the invention is optimized PoC time delay schematic flow sheet;
Fig. 3 sets up schematic flow sheet for embodiment of the invention PoC session;
Fig. 4 sets up schematic flow sheet for another PoC session of the embodiment of the invention;
Fig. 5 is the encryption flow schematic diagram of embodiment of the invention PoC info;
Fig. 6 is embodiment of the invention gateway GPRS supporting node (GGSN) structural representation;
Fig. 7 is another routine gateway GPRS supporting node (GGSN) structural representation of the invention process;
Fig. 8 is embodiment of the invention terminal structure schematic diagram;
Fig. 9 is another terminal structure schematic diagram of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
For broadcasting and multicast bear (as MBMS) PoC downlink data scheme, MT is not needed to distribute special transfer resource after having exhaled, and only needs to realize by the MBMS common carrier transmission of PoC downlink data; Thus, if can obtain PoC session information in advance, add PoC group, MT just can enter the Right_To_Listen state before PDP context activation, carry out the reception of downlink data, thereby reduced the initial time delay of setting up of PoC session greatly.
In following embodiment, illustrated for MT obtains professional relevant relevant information as early as possible, such as, the PoC service session has comprised service related information, as the PoC service session information in the beep-page message of creating.
As shown in Figure 2, the embodiment of the invention provides a kind of method of optimizing the PTT time delay, comprising:
Step 201: obtain called paging relevant information and PoC session information;
GGSN obtains the mode of PoC session information in the above-mentioned execution mode: can be carried in the message that sends called call-related information by the PoC server, also can use independent message to send by the PoC server; Certainly GGSN makes and otherwise gets access to PoC session information and also be fine, and the embodiment of the invention does not limit this.
Step 202: create beep-page message, above-mentioned beep-page message includes PoC session information;
The mode that the beep-page message bag carries PoC session information has a variety of, for example comprises session initiation protocol invite (SIP Invite) message of carrying PoC session information in above-mentioned beep-page message; Or in the field of above-mentioned beep-page message, comprise the PTT session information.What be understandable that above-mentioned mode of carrying PoC session information is not the exhaustive of the mode of carrying for example, the embodiment of the invention is not constituted to limit.
PoC session information can be the SIP Invite message through the PoC session information of carrying of overcompression, can give MT in the beep-page message with carrying to be carried on after the SIP Invite message compression of PoC session information in the embodiment of the invention; PoC session information can also be the connection message that the binary system PoC that re-constructs uses in addition, and this connection message is that main body makes up with PoC session message, comprises the sign (ID) of PoC session, the session informations such as title of PoC session; PoC info is not limited to two kinds of above-mentioned forms.
The cell format of the binary system PoC application connection message of reconstruct is as shown in table 1:
The binary system PoC of table 1 reconstruct uses connection message
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Port number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The PTT session information can be the information of the above-mentioned PTT session of unique identification, the information of above-mentioned unique identification PoC session, can be the PoC server to port numbers (PortNumber) that should the conversation media resource, or the session identification (Session ID) of the session invitation information of receiving, or the RTP of PoC medium that server sends (Real Time Protocol, RTP) protocol synchronization resource (Synchronization Source, SSRC) sign etc., the information that is understandable that the above-mentioned PTT session of above-mentioned unique identification is not information mode exhaustive of the above-mentioned PTT session of sign, the embodiment of the invention is not constituted to limit.
Further, in PoC session information, can also comprise calling subscriber's information, as calling subscriber's sign.For called, especially one for session group be not familiar with called, if can reflect the information such as position, department of caller (being current speaker) on the terminal called, can be more helpful to called and whole session; Be understandable that the information of caller should be the attribute of optional (optional).
Step 203: the above-mentioned beep-page message of called transmission to above-mentioned called paging relevant information indication is used for the called listen state of having the right that enters.
For MT, after receiving beep-page message, according to new paging reason: PoC session is set up to call out and is stopped cluster conversation and call out (Terminating Group Conversational Call), and UE knows that current paging is in order to set up a new PoC session; According to PoC session information (PoC info), UE adds the PoC session group of appointment.
Above-mentionedly to called transmission beep-page message can be: send above-mentioned beep-page message to the broadcast multi-broadcasting server, encrypt the PoC session information that comprises in the above-mentioned beep-page message by the broadcast multi-broadcasting server according to the cipher mode of broadcast multi-broadcasting server and called negotiation, then the beep-page message of broadcast multi-broadcasting server after the above-mentioned encryption of called transmission.
The executive agent of such scheme step can be gateway GPRS supporting node (GGSN) (Gateway General Packet Radio Service Supporting Node, GGSN), as shown in Figure 3, can be in the lump with reference to figure 1, the difference of Fig. 3 and Fig. 1 is that paging (Paging) message among Fig. 3 includes PoC session information; MT UE enters the Right_To_Listen state and advances to before MT UE end block data protocol context (PDP Context) activation; Because the embodiment of the invention has been informed MT UE PoC session information in Paging message, the SIP core in Fig. 1 embodiment of the invention can be carried PoC session information in giving the SIP Invite message of MT UE in addition.
Fig. 3 is in free time (IDLE) attitude standby with UE in the PoC group, the schematic flow sheet under the MBMS carrying transmission descending reception scene of PoC (network is to user terminal).To be in free time (IDLE) attitude identical with UE, UE is in cell paging channel (CELL paging channel in the PoC group, CELL_PCH) attitude standby or Universal Terrestrial Radio Access Network Acceditation Area paging channel (Universal Terrestril RadioAccess Network PCH, Ura_PCH) during attitude, also can utilize Paging Control Channel (Paging ControlChannel, PCCH) transmit beep-page message, i.e. paging Class1 (PAGING TYPE1).
As shown in Figure 4, if travelling carriage is in single user state cell forward access channel (CELL ForwardAccess Channel, CELL_FACH) attitude or cell private channel (CELL Dedicated Channel, CELL_DCH) during attitude, will utilize Dedicated Control Channel (Dedicated Control Channel, DCCH) transmit beep-page message, i.e. paging type 2 (PAGING TYPE2).Be with Fig. 3 difference, set up the flow process that the Cheng Qian needs frame of broken lines in the execution graph 4 in the packet domain session, Radio Resource control, PDP connect activation, Radio Resource control, caller and called renewal (Update) to Ura_PCH.The difference of Fig. 4 and Fig. 3 also comprises in addition: calling and called need be carried out Cell_Update Ura_PCH to Cell FACH behind the button processing delay, do not need the Radio Resource control flow in the execution graph 3.Do not influence the implementation procedure of present embodiment as existing fixedly flow process.
As Fig. 3 and Fig. 4, for IDLE attitude standby MT, enter the Right_To_Listen state in advance, PoC session is initially set up the time delay gain that obtains about 460ms; For URA_PCH attitude standby MT, if PDP Context and un-activation when being exhaled enters the Right_To_Listen state in advance, PoC session is initially set up and is obtained the time delay gain of the 460ms left and right sides; If PDP Context activates, enter the Right_To_Listen state in advance, PoC session is initially set up and is obtained the time delay gain of the 100ms left and right sides.
By carrying PoC session information in the beep-page message that sends to MT UE at GPRS Support Node, make MT UE can enter the Right_To_Listen state in advance, MT UE enters the Right_To_Listen state and MO enters the delay inequality of Right_To_Speak state thereby reduced, and then has reduced the initial setup delay of PoC session.
The cipher mode of PoC info:
PoC info is carried in the beep-page message can be encrypted processing, and cipher mode can be realized by application layer protocol: idiographic flow as shown in Figure 5, comprising:
Step 501: broadcast multi-broadcasting Control Server (Broadcast Multicast Server control, BM-SC) (MBMS Service Key MSK) sends to the PoC terminal with the multimedia broadcast multi-broadcasting business services key by multimedia broadcast multi-broadcasting business announcement (MBMS Announcement) mode; Above-mentioned PoC terminal can be MT UE.
Step 502:BM-SC and PoC terminal be by PDP context activation, obtain the multimedia broadcast multi-broadcasting business communication key that MSK encrypts (MBMS Traffic Key, MTK);
Step 503:PoC terminal parses MTK with MSK;
The PoC info of PoC server (server) and BM-SC encrypts alternately then; Mutual encrypted process can for:
Step 504:PoC server sends PoC info to BM-SC;
Step 505:BM-SC uses the PoC info of MSK to be encrypted;
PoC info after step 506:BM-SC will encrypt sends to PoC server;
PoC info after step 507:PoC server will encrypt is transmitted to GPRS Support Node;
PoC info after step 508:GPRS support node will be encrypted is carried on and is handed down to the PoC terminal in the beep-page message;
Step 509:PoC terminal is utilized MTK deciphering PoC info.
Because SIP INVITE transmits in the PDP pipeline of encrypting in the scheme that has had, such scheme has solved PoC session information and has been placed on a RRC signaling of not encrypting, and here be beep-page message, in transmit the problem that needs encryption.
As shown in Figure 6, the embodiment of the invention also provides a kind of gateway GPRS supporting node (GGSN), comprising:
Acquiring unit 601 is used for obtaining called paging relevant information and PTT session information;
Beep-page message creating unit 602 is used for creating the beep-page message that includes the PTT session information;
Transmitting element 603 is used for comprising to the called transmission of above-mentioned called paging relevant information indication the beep-page message of above-mentioned PTT session information.
More specifically, as shown in Figure 7, above-mentioned beep-page message creating unit 602 comprises: the first information adds subelement 701, is used for adding the session initiation protocol invite message of carrying the PTT session information at above-mentioned beep-page message; And/or second information is added subelement 702, is used for adding the PTT session information in the field of above-mentioned beep-page message.
More specifically, the above-mentioned first information adds subelement 701, and concrete being used for added the port numbers that comprises corresponding above-mentioned PTT conversation media resource in the PTT service device in the field of above-mentioned beep-page message; Or the session identification of the message request of above-mentioned PTT session; Or the session initiation protocol invite message of the RTP isochronous resources of PTT service medium that device sends sign;
Above-mentioned second information is added subelement 702, the concrete port numbers that is used for adding in the field of above-mentioned beep-page message corresponding above-mentioned PTT conversation media resource in the PTT service device; Or the session identification of the message request of above-mentioned PTT session; Or the RTP isochronous resources of PTT service medium that device sends sign.
Alternatively, the PTT session information can be encrypted, so:
Above-mentioned acquiring unit 601, concrete for obtaining the PTT session information of encryption;
Above-mentioned transmitting element 603, concrete being used for to the called beep-page message that comprises the PTT session information of above-mentioned encryption of above-mentioned called paging relevant information indication.
As shown in Figure 8, the embodiment of the invention also provides a kind of terminal, comprising:
Beep-page message receiving element 801 is used for receiving the beep-page message from gateway GPRS supporting node (GGSN);
Beep-page message resolution unit 802 is used for resolving above-mentioned beep-page message and obtains the PTT session information;
More specifically, above-mentioned beep-page message resolution unit 802, concrete being used for obtained the session initiation protocol invite message that comprises at above-mentioned beep-page message, resolves above-mentioned session initiation protocol invite message then and obtains the PTT session information; Or
In the field of above-mentioned beep-page message, obtain the PTT session information.
Further, as shown in Figure 9, above-mentioned terminal can also comprise:
Cipher mode negotiation element 901 is used for the cipher mode with broadcast multi-broadcasting server negotiate PTT session information;
Above-mentioned beep-page message receiving element 801, the concrete beep-page message that is used for receiving from the PTT session information that comprises encryption of gateway GPRS supporting node (GGSN);
Above-mentioned beep-page message resolution unit 802, the concrete manner of decryption that is used for the cipher mode correspondence of the above-mentioned PTT session information of foundation is resolved above-mentioned beep-page message, obtains the PTT session information.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
More than a kind of method and apparatus of optimizing the PTT time delay that the embodiment of the invention is provided be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a method of optimizing the PTT time delay is characterized in that, comprising:
Obtain called paging relevant information and PTT session information; Described PTT session information is for can make the called information that enters the listen state of having the right;
The beep-page message that comprises described PTT session information to the called transmission of described called paging relevant information indication.
2. according to the described method of claim 1, it is characterized in that the described beep-page message that comprises described PTT session comprises:
In described beep-page message, comprise the session initiation protocol invite message of carrying the PTT session information; Or
In the field of described beep-page message, comprise the PTT session information.
3. according to the described method of claim 1, it is characterized in that described PTT session information comprises:
The port numbers of corresponding described PTT conversation media resource in the PTT service device; Or
The session identification of the message request of described PTT session; Or
The RTP isochronous resources sign of PTT service medium that device sends.
4. according to claim 1 or 2 described methods, it is characterized in that, obtain the PTT session information and be specially: the PTT session information that obtains encryption;
The described described beep-page message of called transmission to described called paging relevant information indication is specially: to the called beep-page message that comprises the PTT session information of described encryption of described called paging relevant information indication.
5. a gateway GPRS supporting node (GGSN) is characterized in that, comprising:
Acquiring unit is used for obtaining called paging relevant information and PTT session information; Described PTT session information is for can make the called information that enters the listen state of having the right;
The beep-page message creating unit is used for creating the beep-page message that includes the PTT session information;
Transmitting element is used for comprising to the called transmission of described called paging relevant information indication the beep-page message of described PTT session information.
6. according to the described gateway GPRS supporting node (GGSN) of claim 5, it is characterized in that, described beep-page message creating unit comprises: the first information adds subelement, is used for adding the session initiation protocol invite message of carrying the PTT session information at described beep-page message; And/or second information is added subelement, is used for adding the PTT session information in the field of described beep-page message.
7. according to the described gateway GPRS supporting node (GGSN) of claim 6, it is characterized in that, the described first information adds subelement, and concrete being used for added the port numbers that comprises corresponding described PTT conversation media resource in the PTT service device in the field of described beep-page message; Or the session identification of the message request of described PTT session; Or the session initiation protocol invite message of the RTP isochronous resources of PTT service medium that device sends sign;
Described second information is added subelement, the concrete port numbers that is used for adding in the field of described beep-page message corresponding described PTT conversation media resource in the PTT service device; Or the session identification of the message request of described PTT session; Or the RTP isochronous resources of PTT service medium that device sends sign.
8. according to the described gateway GPRS supporting node (GGSN) of claim 5, it is characterized in that,
Described acquiring unit, concrete for obtaining the PTT session information of encryption;
Described transmitting element, concrete being used for to the called beep-page message that comprises the PTT session information of described encryption of described called paging relevant information indication.
9. a terminal is characterized in that, comprising:
The beep-page message receiving element is used for receiving the beep-page message that comprises the PTT session information from gateway GPRS supporting node (GGSN);
The beep-page message resolution unit is used for resolving described beep-page message and obtains the PTT session information;
The state switch unit is used for entering the listen state of having the right according to described PTT session information.
10. according to the described terminal of claim 9, it is characterized in that,
Described beep-page message resolution unit, concrete being used for obtained the session initiation protocol invite message that comprises at described beep-page message, resolves described session initiation protocol invite message and obtains the PTT session information; Or
In the field of described beep-page message, obtain the PTT session information.
11. according to the described terminal of claim 9, it is characterized in that, also comprise:
The cipher mode negotiation element is used for the cipher mode with broadcast multi-broadcasting server negotiate PTT session information;
Described beep-page message receiving element, the concrete beep-page message that is used for receiving from the PTT session information that comprises encryption of gateway GPRS supporting node (GGSN);
Described beep-page message resolution unit, the concrete manner of decryption that is used for the cipher mode correspondence of the described PTT session information of foundation is resolved described beep-page message, obtains the PTT session information.
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| WO2006056852A2 (en) * | 2004-11-23 | 2006-06-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Ussd-facilitated call setup for push to talk over cellular (poc) services |
| CN101005704A (en) * | 2006-06-20 | 2007-07-25 | 华为技术有限公司 | Optimizing method for one key pass through service call set-up time delay based on honeycomb network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006056852A2 (en) * | 2004-11-23 | 2006-06-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Ussd-facilitated call setup for push to talk over cellular (poc) services |
| CN101005704A (en) * | 2006-06-20 | 2007-07-25 | 华为技术有限公司 | Optimizing method for one key pass through service call set-up time delay based on honeycomb network |
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