CN1992929A

CN1992929A - System and method for implementing PTT service in 3G mobile communication network

Info

Publication number: CN1992929A
Application number: CN 200510097450
Authority: CN
Inventors: 苏东升; 马继鹏; 徐莉; 熊春山; 王文清; 郭轶; 赵榕; 翁靖; 尉宁; 李振江; 屈军红; 魏红; 张晓蓉; 杨君云
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2005-12-28
Filing date: 2005-12-28
Publication date: 2007-07-04
Anticipated expiration: 2025-12-28
Also published as: CN100459745C

Abstract

The invention relates to a system for realizing one-key operation in third-generation mobile communication network, wherein it comprises 3G wireless network subsystem RNS, corn network CN, and terminal supporting one-key operation PTT service, PTT server for authorizing and identifying the PTT service, controlling PTT page, storing and managing group information, copying medium, statistic service and charging; PTT terminal connected to the PTT server via wires for initializing and participating the distribution service as multicast and broadcast, to manage the group members; PTT wireless terminal wirelessly connected to the PTT server to initialize and participate the PTT service. The invention also discloses a relative method. The invention can use PTT server to realize PTT service at 3G network.

Description

In the 3G (Third Generation) Moblie network, realize the system and method for PTT business

Technical field

The present invention relates to the mobile communication technology field, be specifically related to a kind of system and method for in the 3G (Third Generation) Moblie network, realizing the PTT business.

Background technology

Push to Talk (Push To Talk, PTT) business is a kind of half-duplex communication mode, and on the user terminal of supporting PTT, the user can carry out one to one or carry out in the larger context between group the conversation of similar intercom function.The calling subscriber presses the PTT button and can talk, and the called off-hook that need not can be answered, and unclamps the PTT button after calling subscriber's speech finishes and promptly discharges speaking right, and other users obtain speaking right by pressing the PTT button, and the user who obtains speaking right can talk.

Provide the system of PTT business to mainly contain at present: simulation group system, digital cluster system, as iDEN (integrated Digital Enhanced Network) system and TETRA (terrestrial trunked radio) system etc., and PoC (the Push-to-talk over Cellular) system that the PTT value-added service is provided.The PTT business that group system provides has the call proceeding time, and short (＜1s) characteristics are fit to be applied to the specialized communication field, as the dispatching communication of occasions such as public safety, enterprise's production.The PoC system is based on the IP Multimedia System (IMS) of 3GPP (third generation partner program) definition, and its PTT business is primarily aimed at public users, and performance index can't satisfy the requirement of professional user's dispatching communication.

Existing group system mainly is speech and low-speed data service design, be difficult to satisfy the demand of user to high-speed data service, though the PoC standard can provide PTT business on IMS, the call proceeding time of stipulating in the standard is the fastest＜2s, is difficult to satisfy professional user's demand.Therefore, the PoC standard clearly regulation PoC can not be applied to professional domains such as public safety.

Summary of the invention

The purpose of this invention is to provide a kind of system that in the 3G (Third Generation) Moblie network, realizes the PTT business, is that the PoC system calling of the purpose speed that continues is slow to overcome existing so that value-added service to be provided, can not satisfy the requirement of professional user's dispatching communication, strengthen 3G (3G (Third Generation) Moblie) systemic-function.

Another object of the present invention provides a kind of method that realizes the PTT business in the 3G (Third Generation) Moblie network, to remedy that existing professional group system can't provide high-speed data service and at the PoC system calling of the public users slow deficiency of speed that continues, 3G network framework based on maturation is realized the PTT business, satisfies user's different demands.

For this reason, the invention provides following technical scheme:

A kind of system that realizes the PTT business in the 3G (Third Generation) Moblie network comprises: the terminal of 3G RNS RNS, core net CN and support PTT PTT business, and described system also comprises:

Ptt server is used to realize the authentication of PTT business and storage and management, medium replication, business statistics and the charging that mandate, PTT call out control, group information;

The PTT catv terminal is undertaken alternately by wired mode and ptt server, is used to initiate and participate in comprising the dispatching services of group calling and broadcasting, and realizes the management to group member;

The PTT wireless terminal is undertaken alternately by wireless mode and ptt server, is used for initiating and participating in the PTT business.

Described system also comprises:

The PTT database is used to ptt server that management information is provided.

Ptt server, PTT catv terminal and PTT database are arranged in CN.

The PTT portable terminal links to each other with ptt server by the Pa interface, and the PTT catv terminal links to each other with ptt server by the Pl interface, and the PTT database links to each other with ptt server by the Pr interface; Link to each other by the Pn interface between the ptt server.

A kind of method that realizes the PTT business in the 3G (Third Generation) Moblie network is finished the PTT business function by in 3G (Third Generation) Moblie server net ptt server being set, and said method comprising the steps of:

A, calling subscriber send the invitation INVITE by ptt server to the called subscriber, set up the PTT calling procedure;

After B, the success of PTT call setup, calling subscriber and called subscriber converse for the physical channel of its configuration by radio network controller (RNC) separately;

Behind C, the talk-through by user or the ptt server dispose procedure that makes a call.

Alternatively, described steps A comprises:

The RNC of A11, Calling Side and callee side is respectively the calling subscriber and the called subscriber distributes interface-free resources and configures physical channel;

After A12, Calling Side physical channel were reshuffled and finished, the calling subscriber was ready to complete PHReady message informing ptt server by physical channel;

After A13, callee side physical channel were reshuffled and finished, the called subscriber was by 200OK message informing ptt server;

A14, ptt server are received the 200OK message that the called subscriber sends, and can begin speech by 200OK message informing calling subscriber, finish the PTT call establishment.

Alternatively, described steps A comprises:

After A21, called subscriber receive the invitation INVITE of ptt server transmission, reply 200OK message to ptt server immediately;

The RNC of A22, Calling Side and callee side is respectively the calling subscriber and the called subscriber distributes interface-free resources and configures physical channel;

After A23, Calling Side physical channel were reshuffled and finished, the calling subscriber was ready to complete PHReady message informing ptt server by physical channel;

A24, ptt server send 200OK message to the calling subscriber after receiving that physical channel that the calling subscriber sends is ready to complete PH Ready message immediately, and subscriber call can begin speech;

After A25, callee side physical channel were reshuffled and finished, the called subscriber was ready to complete PHReady message informing ptt server by physical channel;

After A26, ptt server received that physical channel that the called subscriber sends is ready to complete PH Ready message, the called subscriber reached the standard grade by circular NOTIFY subscriber call, finishes the PTT call establishment.

Described method further comprises step:

One session timer is set;

Receive calling subscriber's voice when ptt server after, be not ready to complete PH Ready message, then open described Session Timer if ptt server is also received called subscriber's physical channel;

Before the described Session Timer time arrives, if receiving called subscriber's physical channel, ptt server is ready to complete PH Ready message, then close described Session Timer;

Otherwise, after the described Session Timer time arrives, initiate PTT by ptt server and call out dispose procedure.

The PTT that described ptt server is initiated calls out dispose procedure and comprises:

Ptt server leaves BYE message to calling subscriber and called subscriber's transmission respectively, and indicating call discharges;

After the user receives and leaves BYE message, by the 200OK message response;

Receive all users' 200OK response when ptt server after, discharge the information of calling out preservation into this time;

Calling Side RNC and callee side RNC carry out physical channel to calling subscriber and called subscriber respectively and reshuffle, and make the user get back to discontinuous forward access channel FACH state.

Described steps A further comprises:

After the PTT call establishment is finished, the calling subscriber sends the empty bag of a realtime transmission protocol RTP by ptt server to the called subscriber, in order to produce the packet data convergence protocol PDCP context of user equipment (UE) and radio network controller (RNC), use for the PDCP compression.

Described RNC comprises step for the user distributes the process of interface-free resources and configures physical channel:

The user sends the PTT service request information to RNC;

RNC receives that the user who serves for request after the described PTT service request information distributes interface-free resources, and by physical channel reconfiguration message notice user resources configuring condition;

The user changes dedicated channel DCH state over to after receiving described physical channel reconfiguration message, and notifies the RNC physical channel to reshuffle on DCH and finish.

Described step B comprises:

B1, user by seat in a legislative assembly request Floor Request message to ptt server request speaking right; The sign and the priority that have this user in the request message of described seat in a legislative assembly;

B2, ptt server are arbitrated according to the sequencing of each user's request and/or user's priority, determine to obtain the user of speaking right;

Initiate the speaking right dispose procedure or initiate the speaking right dispose procedure by the user who takies speaking right after B3, speech finish by network side.

Described step B2 comprises:

After the seat in a legislative assembly request Floor Request message that the user that the request of receiving of B21, ptt server is talked sends, send the seat in a legislative assembly to other users and take Floor Taken message, notify other users to obtain speaking right user's information;

B22, ptt server send the seat in a legislative assembly to the user who obtains speaking right and permit Floor Grant message, indicate it to obtain speaking right;

B23, under the occupied situation of speaking right, the user that priority is higher than current talker continues to ptt server request speaking right;

B24, ptt server send the seat in a legislative assembly to the low user of level earlier and cancel Floor Revoke message, force to discharge its speaking right;

B25, ptt server send seat in a legislative assembly allowance Floor Grant message to the user of high priority, indicate it to obtain speaking right.

Described step B3 comprises:

The process of being initiated speaking right release by the user who takies speaking right comprises step:

The user who takies speaking right sends the seat in a legislative assembly to ptt server and discharges Floor Release request message;

After ptt server received that described seat in a legislative assembly discharges Floor Release request message, the user in all-calls sent seat in a legislative assembly idle Floor Idle message, notifies the present speaking right free time;

The process of being initiated speaking right release by ptt server comprises step:

Set speech duration timer;

Ptt server starts described speech duration timer after having obtained speaking right by seat in a legislative assembly allowance Floor Grant message indication user;

After described speech duration timer time arrived, ptt server sent the seat in a legislative assembly to this user and cancels Floor Revoke message, and force users discharges speaking right;

The user that the user and be compelled to of ptt server in all-calls discharges speaking right sends seat in a legislative assembly idle Floor Idle message, notifies the present speaking right free time.

Described step C comprises:

Call out dispose procedure by Client-initiated and comprise step:

Caller or called subscriber send to ptt server and leave BYE message, and the notice ptt server is called out and discharged;

After ptt server is received and is left BYE message, by the 200OK message response;

Calling Side RNC and callee side RNC carry out physical channel to calling subscriber and called subscriber respectively and reshuffle, and make the user get back to discontinuous forward access channel FACH state;

The calling dispose procedure of being initiated by ptt server comprises step:

Set the idle timer of speaking right;

If ptt server is found PTT and is called out all not request speeches of each side, then starts this timer;

After the idle timer time of described speaking right arrived, ptt server left BYE message to calling subscriber and called subscriber's transmission respectively, and indicating call discharges;

After the user receives and leaves BYE message, by the 200OK message response;

Described Calling Side RNC and callee side RNC carry out the step that physical channel reshuffles to calling subscriber and called subscriber respectively and comprise:

Calling subscriber and called subscriber discharge request message notice RNC separately by the PTT service respectively and call out release;

RNC initiates the physical channel reconfiguration course by physical channel weight configuration messages, makes the user get back to discontinuous FACH state;

The user reshuffles by physical channel and finishes message response RNC, and forwards discontinuous FACH state to.

It is characterized in that,

Described invitation INVITE is produced by the application layer of user equipment (UE), eats dishes without rice or wine to transmit by Random Access Channel RACH channel at Calling Side, eats dishes without rice or wine to transmit by forward access channel FACH at callee side.

By above technical scheme provided by the invention as can be seen, the present invention is by on the basis of existing 3G network framework, by increasing the kernel entity of realizing the PTT business, be that ptt server is realized the PTT business function, finish the authentication of PTT business and storage and the functions such as management, medium replication, business statistics and charging that mandate, PTT call out control, group information.Utilize the present invention realize PTT have when professional calling speed fast (＜1s), can provide high-speed data service, compare with professional group system and remedied the deficiency that professional group system can't provide high-speed data service; Compare with PoC and to have remedied the slow-footed deficiency of PoC call setup.

Description of drawings

Fig. 1 is a 3G mobile communications network configuration diagram;

Fig. 2 is a system group network schematic diagram of the present invention;

Fig. 3 is to serve as the protocol stack model of carrying realization PTT business with 3G system packet domain;

Fig. 4 is the protocol stack model that control plane and user plane are realized the PTT business;

Fig. 5 is the realization flow figure of the inventive method;

Fig. 6 is that flow process is set up in the PTT normal call;

Fig. 7 is that the PTT short calling is set up flow process;

Fig. 8 is that PTT calls out the release flow process;

Fig. 9 is the professional speaking right request of a PTT flow process;

Figure 10 is that the professional speaking right of Client-initiated PTT discharges flow process;

Figure 11 is that the professional speaking right of PTT that network side is initiated discharges flow process;

Figure 12 is that the professional speaking right of Client-initiated PTT is seized flow process.

Embodiment

Core of the present invention is on the basis of existing 3G network framework, by increasing the kernel entity of realizing the PTT business, be that ptt server is realized the PTT business function, finish the authentication of PTT business and storage and the functions such as management, medium replication, business statistics and charging that mandate, PTT call out control, group information.When carrying out call setup, the calling subscriber sends the invitation INVITE by ptt server to the called subscriber, sets up the PTT calling procedure; After the success of PTT call setup, calling subscriber and called subscriber converse for the physical channel of its configuration by RNC separately; Behind the talk-through by user or the ptt server dispose procedure that makes a call.

In order to make those skilled in the art person understand the present invention program better, at first existing 3G network framework is carried out simple declaration.

Reference 3G mobile communications network configuration diagram shown in Figure 1:

Wherein, RNS (RNS) is divided into base station node B and radio network controller (RNC) two parts.Node B mainly finishes the processing of Uu interface physical layer protocol by the Iub interface and the RNC interconnection of standard; RNC mainly finishes functions such as connecting foundation and disconnection, switching, the merging of grand diversity, RRM control.

CN be responsible for other networks be connected with to the communicating by letter and manage major function of UE, the major function entity has: MSC/VLR (mobile services switching centre/VLR Visitor Location Register), GMSC (GMSC (gateway mobile switching center)), SGSN (Serving GPRS Support Node), GGSN (Gateway GPRS Support Node), HLR (attaching position register), MGW (media gateway).

MSC/VLR is core net CS domain-functionalities nodes, it links to each other with UTRAN by the Iu_CS interface, link to each other with external network (PSTN, ISDN etc.) by the PSTN/ISDN interface, link to each other with HLR/AuC (Home Location Register/AUC) by the C/D interface, link to each other with other MSC/VLR, GMSC or SMC (short message service center) by E interface, link to each other with EIR (mobile device identification register) by F interface, link to each other with SGSN by Gs interface, link to each other with MGW by Mc interface, link to each other with GMSC by Nc interface.The major function of MSC/VLR provides the functions such as calling control, mobile management, authentication and encryption in CS territory.

GMSC is the gateway node between mobile network CS territory and the external network, is the optional function node, and it links to each other with external network (PSTN, ISDN, other PLMN) by the PSTN/ISDN interface, links to each other with HLR by C interface, links to each other with MGW by Mc interface.The major function of GMSC is the mobile gateway office of serving as between mobile network and the fixed network, finishes the routing function of PSTN user's incoming call when exhaling the mobile subscriber, bear between route analysis, net continue, critical function such as inter-network settlement.

SGSN is core net PS domain-functionalities nodes, it links to each other with UTRAN by the Iu_PS interface, link to each other with GGSN by the Gn/Gp interface, link to each other with HLR/AuC by Gr interface, link to each other with MSC/VLR by Gs interface, connect by Gf interface and EIR order, link to each other with SMS-GMSC (short-message system-GMSC (gateway mobile switching center))/SMS-IWMSC (short-message system-intercommunication MSC), link to each other with SGSN by the Gn/Gp interface by the Gd interface.The major function of SGSN provides the functions such as routing forwarding, mobile management, session management, authentication and encryption in PS territory.

GGSN is core net PS domain-functionalities nodes, links to each other with SGSN by the Gn/Gp interface, links to each other with outer data network Internet/Intranet by the Gi interface.GGSN provides route and the encapsulation of packet between 3G mobile network and external data network.The GGSN major function is the interface function with the external IP packet network, and GGSN need provide UE to insert the critical point function of extenal grouped network.

HLR is the total functional node in core net CS territory and PS territory, and it links to each other with MSC/VLR or GMSC by C interface, links to each other with SGSN by Gr interface, links to each other with GGSN by the Gc interface.The major function of HLR provides that user's CAMEL-Subscription-Information is deposited, the functions such as authentication of new business support, enhancing.

MGW is the circuit-switched service of GSM (global system for mobile communications) and the interface of PSTN, also is the interface of wireless access network and 3G core net.Link to each other by Nb interface between the MGW.

External network can be divided into two classes: circuit-switched network (CSNetworks) provide Circuit-switched Connection Service; Packet switching network (PS Networks) provides the Connection Service of packet.

System of the present invention is based on above-mentioned 3G network framework, by increasing ptt server in core net, and the 3GPP standard interface carried out increased functionality and replenishes, and makes it support the PTT business.

Reference system group network schematic diagram of the present invention shown in Figure 2:

System of the present invention is under the constant prerequisite of the network configuration that keeps the 3GPP definition, for supporting the PTT business, the present invention has introduced new functional entity: ptt server (PTT server), PTT database (PDB, PTT Data Base) and PTT catv terminal (LS), and the 3GPP standard interface increased functionality and expansion have been carried out, form Uu+, Iub+ etc. and strengthen interface, increased Pr, Pn, Pl, Pa interfaces such as (logic interfacings) simultaneously newly.

Wherein, PTT UE (PTT portable terminal) links to each other with ptt server by the Pa interface, and LS links to each other with ptt server by the Pl interface, and PDB links to each other with ptt server by the Pr interface.Link to each other by the Pn interface between the ptt server.

In system of the present invention, the implementation of common 3G business remains unchanged, and the business (as individual calling, group calling etc.) that PTT is relevant will be carried on the packet domain, realizes by newly-increased functional entity.Wherein, ptt server is the core that realizes the PTT business, and its function comprises the authentication of PTT business and storage and management, medium replication, business statistics and the charging etc. that mandate, PTT call out control, group information; The PTT catv terminal links to each other with ptt server by wired mode, has special authority, can initiate and participate in dispatching servicess such as group calling, broadcasting, and can realize the management function to group member.The PTT catv terminal has higher priority in the speaking right control that pTT calls out, can be used as dispatching desk and use.

The PTT portable terminal is the functional module that increases PTT button, loud speaker and other processing PTT business in common 3G terminal.

In order to cooperate ptt server to finish the PTT business function, can in original RNC, increase the PTT proxy module, be responsible for the relevant treatment of group service among the RNC, comprise each cell downlink shared channel in the RNC foundation, cluster multi call Media Stream duplicate distribution etc.

MSC/VLR, GMSC are identical with MSC/VLR function in the 3G system, and for the user provides traditional mobile voice service and circuit data service, GMSC is responsible for public correspondence nets such as system and PSTN/PLMN and realizes intercommunication; SGSN, GGSN are responsible for providing Packet data service to the user, as the business of www, database navigation, download and other visits Internet/Intranet.

HLR/AuC is the database of storing user subscription information, positional information, and inquiry and modification and other operations to customer position information can be provided in real time, realizes the user mobility management in the mobile radio communication.AuC is responsible for the generation and the management of user security data.

It is the protocol stack model that carrying realizes the PTT business that Fig. 3, Fig. 4 show with 3G system packet domain, and wherein: the signaling plane of PTT business and user plane all are carried on the user plane of packet domain.

The control plane of the protocol stack of realization PTT business is made up of the professional control protocol of PTT, UDP (user datagram protocol), IP and 3G packet domain user plane.The professional control protocol of PTT is mainly finished following function: registration, calling, right of speech control, supplementary service and special controlled function, authentication, encryption.

The user plane of the protocol stack of realization PTT business is made up of RTP (RTP), UDP, IP and 3G packet domain user plane.User plane is used for the vocoded data of transmission user.

Based on said system, the present invention also provides the method that realizes the PTT business, below in conjunction with drawings and embodiments the inventive method is elaborated.

With reference to Fig. 5, Fig. 5 is the realization flow of the inventive method, may further comprise the steps:

Step 501: the calling subscriber sends the invitation INVITE by ptt server to the called subscriber, sets up the PTT calling procedure.

Can be divided into normal PTT call flow and quick PTT call flow to the upright process of the call setup of PTT business among the present invention.Wherein, it is long slightly that the process calling establishment time delay is set up in normal call, only all confirms that to PTT server PTT calls out relevant treatment and completes successfully back PTT server and just understand the subscriber call speech the calling and called both sides, thus good reliability some; It is short that short calling is set up the process calling establishment time delay, as long as called subscriber answer and calling subscriber confirm that to PTT server PTT calls out relevant treatment and completes successfully and can be talked by PTT server caller notification, by the time the called subscriber is after PTT server confirms that PTT calling relevant treatment completes successfully, PTT Server just sends the PTT speech to called subscriber, and the prompting calling subscriber, called subscriber's successful connection (comprising CSI called subscriber identification) so reliability are weaker a little.

The process of setting up of these two kinds of call flows will be described in detail later.

After the success of step 502:PTT call setup, calling subscriber and called subscriber converse for the physical channel of its configuration by RNC separately.

The present invention is based on 3G existing network framework, provide interface-free resources and configures physical channel for the user who asks the PTT business by RNC.

Step 503: behind the talk-through by user or the ptt server dispose procedure that makes a call.

To describe in detail respectively below PTT business among the present invention call setup, call out flow process such as release.

1.PTT professional call establishment

The call setup flow process of PTT business is divided into normal PTT call flow and quick PTT call flow.Wherein, process is set up in normal call: this process calling establishment time delay is long slightly, only all confirm that to PTT server PTT calling relevant treatment completes successfully back PTT server and just understands the subscriber call speech the calling and called both sides, so reliability is stronger; Short calling is set up process: this process calling establishment time delay is short, as long as called subscriber answer and calling subscriber confirm that to PTT server PTT calls out relevant treatment and completes successfully and can be talked by PTT server caller notification, by the time the called subscriber is after PTT server confirms that PTT calling relevant treatment completes successfully, PTT Server just sends the PTT speech to called subscriber, and the prompting calling subscriber, called subscriber's successful connection (comprising CSI called subscriber identification) so reliability are weaker a little.

Fig. 6 shows the PTT normal call and sets up flow process:

1, the calling subscriber presses the PTT button, promptly sends INVITE (invitation) message, has the information unit and the CSI called subscriber identification of normal PTT call setup indication in the INVITE.INVITE is produced by user plane UDP/IP/PDCP/RLC/MAC/L1 by the application layer of UE and transmits by RACH (Random Access Channel) channel eating dishes without rice or wine.

2, after PTT Server receives INVITE, INVITE is judged,, then INVITE is sent to the called subscriber if can make a call.INVITE eats dishes without rice or wine to transmit by discontinuous FACH (forward access channel) at callee side, sends called subscriber's application layer process to by user plane L1/MAC/RLC/PDCP/IP/UDP.After the called subscriber receives this message, will trigger the physical channel reconfiguration course.Saw for the 6th step.

3, calling UE is after sending out INVITE, then by control plane RRC/RLC/MAC/L1 RRC (Radio Resource control) message " PTT Service Request (PTT service request) " is being eated dishes without rice or wine by the transmission of RACH channel, request RNC (radio network controller) reshuffles for it carries out physical channel.

4, the RNC of Calling Side is that calling UE is distributed interface-free resources, and by Physical ChannelReconfiguration (physical channel is reshuffled) message informing calling UE resource situation.

5, calling UE is after receiving Physical Channel Reconfiguration message on the FACH, transfer to DCH (dedicated channel) state, and on DCH, notify RNC Physical ChannelReconfiguration Complete (physical channel is reshuffled and finished).

6, after called UE is received the INVITE that PTT Server sends, by control plane RRC/RLC/MAC/L 1 RRC message " PTT Service Request " is transmitted by the RACH channel eating dishes without rice or wine, request RNC reshuffles for it carries out physical channel.

7, the RNC of callee side is that called UE is distributed interface-free resources, and by Physical ChannelReconfiguration message informing called UE resource situation.

8, called UE is transferred to the DCH state after receiving Physical Channel Reconfiguration message on the FACH, and notifies RNC Physical Channel ReconfigurationComplete on DCH.

9, when the calling UE physical channel reshuffle finish after, be ready to by PH Ready (physical channel is ready) message informing PTT Server Calling Side resource.

10, when the called UE physical channel reshuffle finish after, be ready to by 200 OK message informing PTT Server called subscriber side resources.

11, after PTT Server receives the PH Ready message of the 200OK message of callee side and Calling Side, send 200OK message to calling UE, the called connection of subscriber call is finished, and can begin speech.So far, whole PTT business sheet exhales call establishment to finish, the calling subscriber can begin speech, the called subscriber is in the state of listening to.

12, calling UE sends the empty bag of a RTP (RTP) to PTT Server, so that produce the PDCP Context (PDCP compresses use) of corresponding UE and RNC.

13, PTT Server should send the empty bag of a RTP to called UE, so that produce the PDCP Context (packet data convergence protocol context) of corresponding UE and RNC, the PDCP compression is used.

Have under the situation of harsh calling establishment time delay index at some, can adopt PTT speed call establishment.

Fig. 7 shows the PTT short calling and sets up flow process:

1, the calling subscriber presses the PTT button, promptly sends INVITE, has the information unit and the CSI called subscriber identification of quick PTT call setup indication in the INVITE.INVITE is produced by user plane UDP/IP/PDCP/RLC/MAC/L1 by the application layer of UE and transmits by the RACH channel eating dishes without rice or wine.

2, after PTT Server receives INVITE, INVITE is judged,, then INVITE is sent to the called subscriber if can make a call.INVITE eats dishes without rice or wine to transmit by discontinuous FACH at callee side, sends called subscriber's application layer process to by user plane L1/MAC/RLC/PDCP/IP/UDP.

3, after the called subscriber receives this message, to send 200 OK message, 200 OK message are being eated dishes without rice or wine by the transmission of RACH channel by user plane UDP/IP/PDCP/RLC/MAC/L1 by the application layer generation of UE, and the called subscriber triggers the physical channel reconfiguration course simultaneously.Saw for the 7th step.

4, calling UE is then being eated dishes without rice or wine RRC message " PTT Service Request " by the transmission of RACH channel by control plane RRC/RLC/MAC/L1 after sending out INVITE, and request RNC carries out physical channel to it and reshuffles.

5, the RNC of Calling Side is that calling UE is distributed interface-free resources, and by Physical ChannelReconfiguration message informing calling UE resource situation.

6, calling UE is transferred to the DCH state after receiving Physical Channel Reconfiguration message on the FACH, and notifies RNC Physical Channel ReconfigurationComplete on DCH.

7, after called UE sends 200 OK message, by control plane RRC/RLC/MAC/L1 RRC message " PTT Service Request " is being eated dishes without rice or wine by the transmission of RACH channel, request RNC carries out physical channel to it and reshuffles.

8, the RNC of callee side is that called UE is distributed interface-free resources, and by Physical ChannelReconfiguration message informing called UE resource situation.

9, called UE is transferred to the DCH state after receiving Physical Channel Reconfiguration message on the FACH, and notifies RNC Physical Channel ReconfigurationComplete on DCH.

10, when the calling UE physical channel reshuffle finish after, be ready to by PH Ready message informing PTTServer Calling Side resource.

11, after PTT Server receives the PH Ready message of the 200OK message of callee side and Calling Side, send 200OK message to calling UE, subscriber call can begin speech.

12, when the called UE physical channel reshuffle finish after, be ready to by PH Ready message informing PTTServer called subscriber side resource.

13, after PTT Server receives the PH Ready message of callee side, reach the standard grade by NOTIFY (circular) message informing calling subscriber called subscriber.

14, calling UE sends the empty bag of a RTP to PTT Server, so that produce the PDCP Context (PDCP compresses use) of corresponding UE and RNC.

15, PTT Server should send the empty bag of a RTP to called UE, so that produce the PDCP Context (packet data convergence protocol) of corresponding UE and RNC, uses for the PDCP compression.

The calling subscriber receives 200OK indication, and the time delay of speaking to customer responsiveness when voice are sent to PTT Server, if PTT Server has received called subscriber's PH Ready message, then is transmitted to the called subscriber with voice about 120ms; Receive calling subscriber's voice when ptt server after, if ptt server is not also received called subscriber's PH Ready message, then open a Session Timer, before Session Timer overflows, if PTT Server receives called subscriber's PH Ready message, then voice are transmitted to the called subscriber.The processing of voice during this period of time can be selected to abandon or store.If Session Timer overflows, PTT Server is with the initiation session dispose procedure.This process is as follows:

1) overflow (promptly not having the user to ask speaking right for a long time) when the idle timer of speaking right, PTT Server will send BYE message to the calling and called user, and indicating call discharges.

2) after the user receives BYE message, by the 200OK message response.Receive all users' 200OK response as PTT Server after, dischargeing is the information that current calling is preserved.

3) user calls out by PTT Service Release Request message informing RNC and discharges.

4) RNC initiates the physical channel reconfiguration course by Physical Channel Reconfiguration message, makes the user get back to discontinuous FACH state.

5) user passes through Physical Channel Reconfiguration Complete message response RNC, and forwards discontinuous FACH state to.

PTT calls out and discharges and can be triggered by UE, also can be triggered (for example, the idle timer of speaking right overflows) by PTT Server.

PTT calls out dispose procedure as shown in Figure 8:

Client-initiated is called out dispose procedure:

1, calling and called user any one party is pressed release key, and UE will send BYE message to PTT Server, and notice PTT Server calls out and discharges.

2, after PTT Server receives BYE message, by the 200OK message response.

B1, PTT Server discharge by another customer call of BYE message informing.

B2, another user are by the 200OK message response.Receive all users' 200OK response as PTT Server after, dischargeing is the information that current calling is preserved.

The calling dispose procedure that PTT Server initiates is:

Receive as PTT server after calling subscriber's the BYE message, start the idle timer of speaking right.

1, overflow (promptly not having the user to ask speaking right for a long time) when the idle timer of speaking right, PTT Server will send BYE message to the calling and called user, and indicating call discharges.

2, after the user receives BYE message, by the 200OK message response.Receive all users' 200OK response as PTT Server after, dischargeing is the information that current calling is preserved.

3, the user calls out release by PTT Service Release Request (the PTT service discharges request) message informing RNC.

4, RNC initiates the physical channel reconfiguration course by Physical Channel Reconfiguration message, makes the user get back to discontinuous FACH state.

5, the user passes through Physical Channel Reconfiguration Complete message response RNC, and forwards discontinuous FACH state to.

In the methods of the invention, the professional speaking right of PTT carries out arbitration process by ptt server according to the sequencing of user's request and user's priority.Be divided into that speaking right request, speaking right discharge, speaking right is seized three parts, will be described respectively below.

When speaking right in the time of the free time, all users that participate in calling out can be by pressing PTT button request speaking right.As shown in Figure 9:

1, user 1 wants speech, therefore presses the PTT button, and UE1 sends FloorRequest (seat in a legislative assembly request) message request speaking right for PTT Server, has user 1 sign in the Floor Request message.User ID can correspond to priority, and in PTT terminal unit contractual PTT business, the network operation chamber of commerce sets its PTT service priority according to user's characteristics of demand, and this priority and user ID are associated together, and is kept in the PTT database.

2, PTT Server sends Floor Taken (seat in a legislative assembly takies) message for other user, notify other user, user 1 has obtained speaking right, priority with user 1 sends to other user simultaneously, and the user who is lower than this priority like this must not send Floor Request message when user 1 has speaking right.

3, PTT Server determines that user 1 can obtain speaking right, to send Floor Grant (seat in a legislative assembly allowance) message to UE1, UE1 will be to user 1 with corresponding acousto-optic hint after receiving Floor Grant message, and the indication user has obtained speaking right, can begin speech.

The speaking right dispose procedure is divided into Client-initiated speaking right dispose procedure and because speech duration timer overflows the speaking right dispose procedure of being initiated by network.

Figure 10 shows Client-initiated speaking right dispose procedure:

1, user 1 pipes down, and discharges the PTT button.UE1 sends Floor Release (seat in a legislative assembly release) request for PTT Server, and notice PTT Server user 1 has discharged speaking right.

2, PTT Server will send Floor Idle (seat in a legislative assembly free time) message to the UE in the all-calls, notify the present speaking right free time.

3, after UE receives Floor Idle message, will indicate the present speaking right of the user free time by acousto-optic.The user can initiate the speaking right request by pressing the PTT button after receiving idle indication.

When user 1 takies speaking right, and the user among the PTT Server 1 takies speaking right duration timer and overflows the professional speaking right dispose procedure of PTT.

Figure 11 shows the speaking right dispose procedure that PTT Server initiates:

Ptt server starts speech duration timer after having obtained speaking right by Floor Grant (seat in a legislative assembly allowance) message indication user.User 1 takies the speaking right overlong time, to such an extent as to the CU speaking right duration timer among the PTT Server overflows, PTT Server will force the speaking right that discharges user 1.

1, PTT Server sends Floor Revoke (cancel at the seat in a legislative assembly) message to UE1.After UE1 receives FloorRevoke message, notify user 1, its speaking right to be compelled to discharge by the acousto-optic indication, user 1 can unclamp the PTT button.User 1 whether unclamps the PTT button and follow-up speaking right process is irrelevant.

2, PTT Server will send Floor Idle message to the UE in the all-calls, notify the present speaking right free time.

In communication process, when a CU speaking right, and the user of another high priority wants to speak, and this user can obtain speaking right by the speaking right preemption processes.

As shown in figure 12, when user 1 took speaking right, the user of high priority (user 2) wanted to seize speaking right, and the professional speaking right preemption processes of PTT is:

1, under the situation that speaking right takies, the user who has only priority to be higher than current talker just can initiate the speaking right request.When user 2 presses the PTT button, because its priority is higher than user 1 priority, so UE2 sends Floor Request message for PTT Server, request obtains speaking right.

2, PTT Server judges user's priority, and when user 2 priority is higher than user 1 priority, then PTT Server will force the speaking right that discharges user 1.PTT Server sends Floor Revoke message to UE1.After UE1 receives Floor Revoke message, notify user 1, its speaking right to be compelled to discharge by the acousto-optic indication, user 1 can unclamp the PTT button.User 1 whether unclamps the PTT button and follow-up speaking right process is irrelevant.

3, PTT Server determines that user 2 can obtain speaking right, will send Floor Grant message to UE2, and UE2 will be to user 2 with corresponding acousto-optic hint after receiving Floor Grant message, and the indication user has obtained speaking right, can begin speech.

4, PTT Server sends Floor Taken (seat in a legislative assembly takies) message for other user, notify other user, user 2 has obtained speaking right, priority with user 2 sends to other user simultaneously, and the user who is lower than this priority like this must not send Floor Request message when user 2 has speaking right.

Utilize the present invention, in the 3G system, realize the PTT business by the functional entity ptt server that increases, have call proceeding speed fast (＜1s), can provide characteristics such as high-speed data service, compare with professional group system and remedied the deficiency that professional group system can't provide high-speed data service; Compare with PoC and to have remedied the slow-footed deficiency of PoC call setup, therefore have good application prospect.

Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.

Claims

1, a kind of system that realizes the PTT business in the 3G (Third Generation) Moblie network comprises: the terminal of 3G RNS RNS, core net CN and support PTT PTT business is characterized in that described system also comprises:

2, system according to claim 1 is characterized in that, described system also comprises:

The PTT database is used to ptt server that management information is provided.

3, system according to claim 2 is characterized in that, ptt server, PTT catv terminal and PTT database are arranged in CN.

4, system according to claim 2 is characterized in that,

5, a kind of method that realizes the PTT business in the 3G (Third Generation) Moblie network is finished the PTT business function by in 3G (Third Generation) Moblie server net ptt server being set, and it is characterized in that, said method comprising the steps of:

6, method according to claim 5 is characterized in that, described steps A comprises:

7, method according to claim 5 is characterized in that, described steps A comprises:

8, method according to claim 7 is characterized in that, described method further comprises step:

One session timer is set;

9, method according to claim 8 is characterized in that, the PTT that described ptt server is initiated calls out dispose procedure and comprises:

After the user receives and leaves BYE message, by the 200OK message response;

10, according to claim 6 or 7 described methods, it is characterized in that described steps A further comprises:

According to claim 6 or 7 described methods, it is characterized in that 11, described RNC comprises step for the user distributes the process of interface-free resources and configures physical channel:

The user sends the PTT service request information to RNC;

12, method according to claim 5 is characterized in that, described step B comprises:

13, method according to claim 12 is characterized in that, described step B2 comprises:

14, method according to claim 13 is characterized in that, described step B3 comprises:

Set speech duration timer;

15, method according to claim 5 is characterized in that, described step C comprises:

Call out dispose procedure by Client-initiated and comprise step:

The calling dispose procedure of being initiated by ptt server comprises step:

Set the idle timer of speaking right;

After the user receives and leaves BYE message, by the 200OK message response;

16, method according to claim 15 is characterized in that, described Calling Side RNC and callee side RNC carry out the step that physical channel reshuffles to calling subscriber and called subscriber respectively and comprise:

17, method according to claim 5 is characterized in that,