CN100355300C

CN100355300C - Method and system for realizing push-to-talk service

Info

Publication number: CN100355300C
Application number: CNB2004100869846A
Authority: CN
Inventors: 王强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2004-10-27
Filing date: 2004-10-27
Publication date: 2007-12-12
Anticipated expiration: 2024-10-27
Also published as: CN1767671A

Abstract

The present invention discloses a method and a system for realizing push-to-talk service. The method comprises the steps that when the connection of a first mobile station (MS) accessing to a radio access network (RAN) in a group is established, a transmission link is established between every two network bodies directly connected in the RAN; when a following MS in the group access to the RAN, the established transmission links are set as the links shared by the following MS in the RAN among the network bodies; the RAN utilizes the shared inside links to transmit the service information of a speaking MS to a cluster server, and utilizes the shared inside links to transmit service information copied by the cluster server to each MS. The system of the present invention comprises the mobile stations, the RAN and the cluster server in the group, wherein the interior of the RAN comprises a base transceiver station (BTS), a base station controller (BSC) and a packet control function body (PCF), and the PCF is directly connected with the cluster server. The present invention has the advantages that network sources can be greatly saved, and service realizing sections and the service time delay can be reduced.

Description

A kind of method and system that realize press-and-talk business

Technical field

The present invention relates to trunking communicating technology, particularly relate to a kind of method and system that realize press-and-talk business.

Background technology

In trunking communication, (Push-to-Talk, PTT) business refers to direct-connected " point-to-point " and " putting multiple spot " voice communication service in real time to press-and-talk.The professional half-duplex operation mode of using of PTT promptly only allow people's speech at one time, and other people can only receive this teller's voice messaging.Use the PTT business, the calling party is as long as need not dialing and wait for that the other side's off-hook just can make a call to a people or lineup by a button, particular talk group is set up in the phone demand working rapidly, therefore be convenient to very much between team, working group and other colony collaborative work with exchange.

The PTT business has the demand higher than plain old telephone based on the characteristics of " press-and-talk " to access delay.Simultaneously, because the characteristics of " half-duplex " that the PTT business is had communication generally need to adopt dedicated network or transform and realize, develop into special-purpose cluster network on the basis of original telephone network.

Fig. 1 is the system configuration schematic diagram of existing techniques in realizing PTT business.Referring to Fig. 1, in the system of existing techniques in realizing PTT business, travelling carriage (MS) in group is by wireless access network (RAN) and cluster server (PTT Server, PS) link to each other, wherein the structure of RAN inside has adopted the structure when carrying out the normal data business, and promptly RAN inside comprises base transceiver station (BTS), base station controller (BSC), Packet Control Function entity (PCF) and packet data serving node (PDSN).

Referring to Fig. 1, MS1 belongs to same group to MS5, is designated as group 1.MS1, MS2 and MS3 are by the RAN1 connecting system, and MS4 and MS5 are by the RAN2 connecting system.Fig. 2 is that prior art is set up the flow chart of each MS to the PS link.Referring to Fig. 1 and Fig. 2, when the call setup of group 1, insert successively to MS5 such as MS1, prior art is set up each MS in the group 1 and be may further comprise the steps to the detailed process of PS link so:

Step 201, MS1 insert BTS1 by channel board 1 (CPB1), between MS1 and CPB1, set up first dedicated link of channel of eating dishes without rice or wine as MS1, then, between CPB1 and BSC1, set up the dedicated link of an Abis link, then, between BSC1 and PCF1, set up the dedicated link of an A8 link as MS1 as MS1, then, between PCF1 and PDSN1, set up the dedicated link of an A10 link, then, on PDSN1 and PS, distribute an IP address for MS1 as MS1.

Step 202, MS2 insert BTS1 by CPB1, between MS2 and CPB1, set up second dedicated link of channel of eating dishes without rice or wine as MS2, then, between CPB1 and BSC1, set up the dedicated link of the 2nd Abis link as MS2, then, between BSC1 and PCF1, set up the dedicated link of the 2nd A8 link, then as MS2, between PCF1 and PDSN1, set up the dedicated link of the 2nd A10 link, and on PDSN1 and PS, distribute an IP address for MS2 as MS2.

Step 203, MS3 insert BTS1 by CPB2, according to the described Principle of Process of above-mentioned steps, set up the 3rd and eat dishes without rice or wine channel, the 3rd Abis link, the 3rd A8 link and the 3rd A10 link, and be that MS3 distributes an IP address on PDSN1 and PS as the dedicated link of MS3.

Step 204, MS4 insert BTS2 by CPB3, according to the described Principle of Process of above-mentioned steps, set up the 4th channel, the 4th Abis link, the 4th A8 link and the 4th A10 link the dedicated link of eating dishes without rice or wine as MS4, between PDSN2 and PS, set up link 2, and on PDSN2 and PS, distribute an IP address for MS4.

Step 205, MS5 insert BTS2 by CPB3, according to the described Principle of Process of above-mentioned steps, set up the 5th and eat dishes without rice or wine channel, the 5th Abis link, the 5th A8 link and the 5th A10 link, and be that MS5 distributes an IP address on PDSN2 and PS as the dedicated link of MS5.

So far, prior art is set up in the group 1 that is over each MS to the dedicated link of PS.

The flow chart of transmission MS voice messaging when Fig. 3 is the existing techniques in realizing Prepaid ﹠ Postpaid Telephony Service.Referring to Fig. 1 and Fig. 3, obtaining speaking right with the MS1 in the group 1 is example, in the prior art, utilizes the detailed process of the dedicated link transmission MS1 voice messaging of each MS that is set up may further comprise the steps:

Step 301, MS1 by self dedicated channel promptly first CPB1 of channel in BTS1 that eat dishes without rice or wine send voice messaging.

Step 302, CPB1 receive behind the voice messaging by MS1 dedicated link promptly an Abis link this voice messaging is sent to BSC1.

Step 303, BSC1 receive behind the voice messaging by MS1 dedicated link promptly an A8 link this voice messaging is sent to PCF1.

Step 304, PCF1 receive behind the voice messaging by MS1 dedicated link promptly an A10 link this voice messaging is sent to PDSN1.

Step 305, PDSN1 send to PS after the voice messaging of the MS1 that receives is broken into the IP bag.

Step 306, PS unpack the IP bag that receives and are voice messaging, and according to the quantity of MS in the group voice messaging are duplicated 5 parts and all break into the IP bag, then 3 parts of IP bags are wherein sent to PDSN1, and other 2 parts of IP bags are sent to PDSN2.

Here, owing to comprise 5 MS in the group 1, therefore, PS duplicates 5 parts of voice messagings.

After step 307, PDSN1 receive 3 parts of IP bags that PS sends, all unpack and be voice messaging, by an A10 link, the 2nd A10 link the 3rd A10 link voice messaging is sent to PCF1 respectively then; After PDSN2 receives 2 parts of IP bags that PS sends, all unpack and be voice messaging, by the 4th A10 link and the 5th A10 link voice messaging is sent to PCF2 respectively then.

Step 308, PCF1 are sent to BSC1 by an A8 link, the 2nd A8 link and the 3rd A8 link with this voice messaging respectively; PCF2 is sent to BSC2 by the 4th A8 link and the 5th A8 link with this voice messaging respectively.

Step 309, BSC1 are sent to CPB1 among the BTS1 by an Abis link and the 2nd Abis link with this voice messaging respectively, by the 3rd Abis link this voice messaging are sent to CPB2 among the BTS1 simultaneously; BSC2 is sent to CPB3 among the BTS2 by the 4th Abis link and the 5th Abis link with this voice messaging respectively.

Step 310, CPB1 are sent to MS1 and MS2 by first channel and second channel of eating dishes without rice or wine of eating dishes without rice or wine with this voice messaging respectively, and CPB2 is sent to MS3 by the 3rd channel of eating dishes without rice or wine with this voice messaging simultaneously; CPB3 is sent to MS4 and MS5 by the 4th channel and the 5th channel of eating dishes without rice or wine of eating dishes without rice or wine with this voice messaging respectively.

So far, each MS receives voice messaging, has realized the PTT business.

Referring to Fig. 1, utilize prior art system and the link set up realizes that there is following shortcoming in the PTT business:

1, prior art set up between inner per two network entities that directly link to each other of RAN with this RAN under the identical link of MS quantity, so can take a large amount of network bandwidths, greatly consumed Internet resources.

2, since the PTT business be used for more between team, working group and other colonies collaborative work with exchange, require that other people can in time receive teller's voice messaging when a people talks, therefore the synchronism that voice messaging is arrived each MS requires very high.But in the prior art, per two network entities of RAN inside are all by the dedicated link transmitting voice information of each MS, make the time difference that all has transferring voice between these per two network entities.In addition, when RAN eats dishes without rice or wine channel when voice messaging is sent to each MS respectively by the special use of each MS, because the difference of transmission link, there is the time difference of transferring voice again.Therefore, it is very big that this method by each MS dedicated link transferring voice of prior art can cause teller's voice messaging to arrive time interval of each MS, thereby be unfavorable for realizing the synchronism of each MS receiving speech information.

3, in the prior art, PS need all duplicate a voice messaging and distributes for each MS in the group, so when the One's name is legion of MS, processing speed and the disposal ability of PS proposed higher requirement, and then increased the cost of cluster network.

4, in existing systems, RAN inside comprises BTS, BSC, PCF and many network entities of PDSN, and voice messaging must transmit by this each network entity, therefore, realize the PTT business by existing systems, can make that the business realizing process is numerous and diverse and increase service delay.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method that realizes press-and-talk business, so that conserve network resources greatly.

Another object of the present invention is to provide a kind of system that realizes press-and-talk business,, reduce service delay so that simplify the business realizing link.

First aspect in order to achieve the above object, the invention provides a kind of method that realizes press-and-talk business, when first mobile station MS for first access wireless access network RAN in the group connects, between the BSC of this RAN inside and BTS, set up transmission link, and between the PCF of this RAN inside and BSC, set up transmission link, when follow-up MS inserts by this RAN in this group, described transmission link between the PCF of this RAN inside and the BSC and the described transmission link between BSC and the BTS are set to the shared link of this follow-up MS in this RAN inside, and this method is further comprising the steps of:

The MS that makes a speech in A, the described group is sent to the RAN that self inserts with business information, and the link between each shared link that this RAN has set up by inside and self and the cluster server transfers to cluster server with business information;

B, cluster server duplication service information, and the business information of duplicating is sent to all RAN that MS in the described group inserts;

Link between each shared link that C, these all RAN have set up by inside and self and the MS sends to each MS in this group respectively with business information.

Comprise in the step of setting up transmission link between BSC and the BTS: set up sharing A bis link between first channel board under BSC and the BTS, wherein, first channel board is the channel board at the channel resource place of a MS;

Comprise in the step of setting up transmission link between PCF and the BSC: between PCF and BSC, set up sharing A 8 links.

Wherein, when the channel resource allocation of follow-up MS is on first channel board of the RAN inside that a MS inserts;

Described transmission link between the PCF of described this RAN inside and the BSC and the described transmission link between BSC and the BTS are set to this follow-up MS and comprise in the step of the shared link of this RAN inside: be set to the transmission link of this follow-up MS between PCF and BSC at inner sharing A 8 links of setting up of this RAN, the sharing A bis link of setting up between the BSC and first channel board is set to the transmission link of this follow-up MS between BSC and BTS.

Wherein, when the channel resource allocation of follow-up MS is on the second channel plate of the RAN inside that a MS inserts;

Further comprise in the step of setting up transmission link between BSC and the BTS: between the BSC of this RAN inside and the second channel plate under the BTS, set up sharing A bis link;

Described transmission link between the PCF of described this RAN inside and the BSC and the described transmission link between BSC and the BTS are set to this follow-up MS and comprise in the step of the shared link of this RAN inside: be set to the transmission link of this follow-up MS between PCF and BSC at inner sharing A 8 links of setting up of this RAN, the sharing A bis link of setting up between BSC and second channel plate is set to the transmission link of this follow-up MS between BSC and BTS.

Described RAN inside further comprises packet data serving node PDSN;

Be a MS when connecting, this method further comprises: in this RAN inside, set up sharing A 10 links between PCF and PDSN;

Described transmission link between the PCF of described this RAN inside and the BSC and the described transmission link between BSC and the BTS are set to this follow-up MS and further comprise in the step of the shared link of this RAN inside: be set to the transmission link of this follow-up MS between PCF and PDSN at inner sharing A 10 links of setting up of this RAN.

Described RAN is connected with cluster server by inner PCF;

In the steps A, the link between described RAN and the cluster server is the PCF of described RAN inside and the link between the cluster server;

In the steps A, described RAN specifically comprises by the step of each shared link transport service information that inside has been set up:

The business information that the MS of the BTS reception speech among A11, the described RAN sends transfers to BSC by the channel board at the channel resource place of speech MS and the sharing A bis link between the BSC in self with business information;

A12, this BSC transfer to PCF by sharing A 8 links between self and the PCF with business information;

Among the step C, the step that each shared link that described RAN has set up by inside sends business information specifically comprises:

The PCF of C11, RAN inside receives the business information that cluster server is sent, and by sharing A 8 links between self and the BSC business information is transferred to BSC;

C12, this BSC transfer to BTS by each the sharing A bis link between each channel board under self and the BTS with business information.

Described RAN is connected with cluster server by inner PDSN;

In the steps A, the link between described RAN and the cluster server is the PDSN of described RAN inside and the link between the cluster server;

The business information that the MS of the BTS reception speech among A21, the described RAN sends transfers to BSC by the channel board at the channel resource place of speech MS and the sharing A bis link between the BSC in self with business information;

A22, this BSC transfer to PCF by sharing A 8 links between self and the PCF with business information;

A23, this PCF transfer to PDSN by sharing A 10 links between self and the PDSN with business information;

The PDSN of C21, RAN inside receives the business information that cluster server is sent, and by sharing A 10 links between self and the PCF business information is transferred to PCF;

C22, this PCF transfer to BSC by sharing A 8 links between self and the BSC with business information;

C23, this BSC transfer to BTS by each the sharing A bis link between each channel board under self and the BTS with business information.

This method further comprises: the dedicated link of setting up each MS in described group between the RAN of each MS and its access;

In steps A, the MS of described speech sends business information by the dedicated link of self;

In step C, all RAN that MS inserts in the described group send business information by the dedicated link of each MS.

Behind the end of calling of described group, this method further comprises: be released to all links that MS sets up in this group.

Described business information is voice messaging or data message.

Another aspect in order to achieve the above object the invention provides a kind of system that realizes press-and-talk business, comprises each MS, RAN and PS in the group, and described RAN inside comprises BTS, BSC and PCF, and described PCF directly links to each other by the Act agreement with PS;

Described BTS is at first MS during by the RAN connecting system under self, sets up between the two shared link with BSC; And after the business information that the MS that makes a speech sends, service message is sent to BSC in receiving group by the shared link of having set up between self and the BSC; And when receiving the business information that BSC sends, business information is sent to each MS that inserts by self;

Described BSC is at first MS during by the RAN connecting system under self, sets up between the two shared link with PCF; And after receiving the business information that BTS sends, service message is sent to PCF by the shared link of having set up between self and the PCF; And when receiving the business information that PCF sends, business information is sent to BTS by the shared link between self and the BTS;

Described PCF is at first MS during by the RAN connecting system under self, sets up between the two shared link with PS; And after receiving the business information that BSC sends, service message is sent to PS by the shared link of having set up between self and the PS; And when receiving the business information that PS sends, business information is sent to BSC by the shared link between self and the BSC;

Described PS according to the quantity duplication service information of shared link between self and each PCF, and is sent to each PCF by each shared link with the business information of being duplicated after receiving the business information that PCF sends

As seen, the present invention has the following advantages:

1, the inventive method is only set up a shared link between inner per two network entities that directly link to each other of RAN, and need not to set up according to the quantity of MS under this RAN numerous dedicated links of each MS, has therefore saved the network bandwidth greatly, has saved Internet resources.In addition, the inventive method is at a shared link also only setting up all MS under this RAN between RAN and the PS, thereby further saved the network bandwidth, saved Internet resources.

2, in the methods of the invention, because PS sends to PCF among the RAN with the voice messaging that duplicates by the link of sharing, therefore, there is not the problem of transmission time difference in voice messaging when PS is transferred to RAN.Because adopt the shared link transmitting voice information between inner per two network entities of RAN, therefore, there is not the problem of transmission time difference in voice messaging yet in RAN inside yet.Just eat dishes without rice or wine channel when voice messaging is sent to each MS respectively by the special use of each MS as RAN, there is one time transmission time difference in the difference owing to transmission link.Therefore, the present invention is very little with the time interval that teller's voice messaging transfers to each MS, thereby helps realizing the synchronism of each MS receiving speech information more.

3, in the methods of the invention, PS need not to duplicate a voice messaging for each MS, and only need according to the number of the shared link of being set up just the number of RAN duplicate voice messaging and distribute, and the number of RAN is less than the number of MS under the RAN far away, therefore, reduced requirement, and then reduced the cost of cluster network PS processing speed and disposal ability.

4, in existing system, RAN inside includes PDSN, and can only transmit the IP bag between PDSN and the PS, like this, in the uplink direction, after voice messaging transfers to PDSN from PCF, PDSN needs voice messaging is broken into the IP bag and transfers to PS, and PS unpacks the IP bag that receives and is voice messaging; At downlink transmission direction, PS breaks into the IP bag after with the voice messaging that duplicates and is sent to PDSN, and PDSN unpacks the IP bag for voice messaging again and transfers to PCF.This shows that in the uplink and downlink transmission course, the IP bag is the intermediate conveyor state of voice messaging just, if without PDSN, voice messaging can not be converted to the IP bag fully, and directly transmits between PCF and PS.Utilize this characteristics, the network entity PDSN of RAN inside has removed in system of the present invention, make voice messaging directly transmission between the PCF of RAN inside and PS, and need not to be converted to the process that IP wraps and be converted to voice messaging from the IP bag through the voice messaging of associating, thereby simplified the business realizing link, reduced service delay.

Description of drawings

Fig. 1 is the system configuration schematic diagram of existing techniques in realizing PTT business.

Fig. 2 is that prior art is set up the flow chart of each MS to the PS link.

The flow chart of transmission MS voice messaging when Fig. 3 is the existing techniques in realizing Prepaid ﹠ Postpaid Telephony Service.

Fig. 4 is the system configuration schematic diagram in the embodiment of the invention 1.

Fig. 5 sets up to initiate the flow chart of the MS of group calling to link between the PS in the group in the embodiment of the invention 1.

Fig. 6 is the flow chart of transmission MS voice messaging in the embodiment of the invention 1.

Fig. 7 is the MS that set up in the embodiment of the invention 2 schematic diagram to link between the PS.

Fig. 8 sets up to initiate the flow chart of the MS of group calling to link between the PS in the group in the embodiment of the invention 2.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.

Main thought of the present invention is to set up shared link between inner per two network entities that directly link to each other of RAN, utilizes each shared link at RAN internal transmission voice messaging.

The present invention can have following 2 kinds of execution modes at least:

The structure of mode 1, change existing system is removed the PDSN of RAN inside in system of the present invention, set up a shared link then between inner per two network entities that directly link to each other of the RAN that does not comprise PDSN, utilizes shared link realization PTT business;

Mode 2, the structure of existing system of not changing are set up a shared link between inner per two network entities that directly link to each other of the RAN that comprises PDSN, utilize shared link to realize the PTT business.

In above-mentioned 2 kinds of execution modes, can also further between RAN and PS, set up a shared link, and utilize this shared link to finish transmission.

Be elaborated for 1 embodiment respectively with regard to above-mentioned 2 kinds of execution modes below.

Embodiment 1:

Fig. 4 is the system configuration schematic diagram in the embodiment of the invention 1.Referring to Fig. 4, in system of the present invention, RAN has removed inside network entity PDSN, includes only BTS, BSC and PCF, and, MS links to each other with RAN by BTS, and in RAN inside, BTS directly links to each other with BSC, BSC directly links to each other with PCF, RAN then links to each other with PS by its inner PCF, and can link to each other by existing Act agreement between PCF and the PS, and this Act protocol definition goes out the shared GSL link of mutual foundation that passes through message between PCF and the PS.Here, the instantiation that the title GSL of described shared link just enumerates for convenience of description, the shared link between this PCF and the PS also may be defined as other title.Compare with existing system shown in Figure 1, system of the present invention is owing to having removed network entity PDSN, so can reduce business realizing link and service delay.

Referring to Fig. 4, in the present embodiment, MS1 belongs to same group to MS5, is designated as group 1.MS1, MS2 and MS3 insert system of the present invention by RAN1, and MS4 and MS5 insert system of the present invention by RAN2.

Fig. 5 sets up to initiate the flow chart of the MS of group calling to link between the PS in the group in the embodiment of the invention 1.Referring to Fig. 4 and Fig. 5, when the MS1 in the group 1 initiates group calling by first access network of the CPB1 among the BTS1, in system of the present invention, set up MS1 and may further comprise the steps to the detailed process of PS link:

Step 501, MS1 send PTT Call Setup message by common signaling channel and initiate group calling, and CPB1, BSC1 and the PCF1 of this message in BTS1 is forwarded to PS.

Step 502, PS issue Assign Request message, and this message is forwarded to BSC1 through PCF1.

Step 503, BSC1 send A9-Setup A8 message to PCF1, and the A8 link is set up in request, and PCF1 sends the GSL link that the foundation of Setup GSL message request is shared to PS after receiving this message.

Here, PCF1 sends Setup GSL message according to the Act agreement that self disposes.

Step 504, PS set up a shared GSL link as the shared link of all MS between PS and PCF1 under the RAN1 after receiving Setup GSL message, and respond Setup GSLAck message to PCF1, and expression is shared the GSL link and set up success.

Here, PS sets up a shared GSL link according to the Act agreement of self configuration, and sends Setup GSL message to PCF1.

Step 505, PCF1 set up and share an A8 link as the shared link of all MS between PCF1 and BSC1 under the RAN1, and send A9-Connect A8 message to BSC1, and expression sharing A 8 links have been set up success.

After step 506, BSC1 receive A9-Connect A8 message, send Abis-BTSSetup message to BTS1, the channel of eating dishes without rice or wine is set up in request.

After step 507, BTS1 receive Abis-BTS Setup message, be MS 1 allocation of channel resources may, the channel board at channel resource place is CPB1, BTS1 responds Abis-Connect message to BSC1 then, the Abis terrestrial links are set up in request, BSC1 sets up and shares an Abis link as the shared link of all MS between CPB1 and BSC1 under the CPB1, and responds Abis-Connect Ack message to BTS1, and expression sharing A bis link has been set up success.

Step 508, BTS1 set up first and eat dishes without rice or wine channel as the dedicated channel of MS1 on CPB1, and send Abis-BTS Setup Ack message to BSC1, and expression is eated dishes without rice or wine and terrestrial links have been set up success.

So far, in system of the present invention, set up first access set group network that is over and promptly initiate the MS1 of group calling to the link between the PS.

Inserting system of the present invention with MS2 successively to MS5 below is example, illustrates that the present invention sets up in the group process of link between other MS and PS.

When the MS2 connecting system, because MS2 and MS1 all insert by the BTS1 under the RAN1, promptly insert by same BTS, so directly share a GSL link and share the transmission link that an A8 link is set to MS2, again because the channel resource of MS2 and MS1 coexists on the channel board CPB1, so directly share the transmission link that an Abis link is set to MS2, just need on CPB1, set up second dedicated channel of channel of eating dishes without rice or wine as MS2.

When the MS3 connecting system, MS3 and MS1 insert by the BTS1 under the RAN1, promptly insert by same BTS, so directly share a GSL link and share the transmission link that an A8 link is set to MS3, but because the channel resource of MS3 and MS1 is on different channel boards, the channel resource of MS3 on the CPB2 and the channel resource of MS1 on CPB1, so set up to share the transmission link of the 2nd Abis link between BSC1 and the CPB2, between CPB2 and MS3, setting up the 3rd dedicated channel of channel of eating dishes without rice or wine as MS3 as all MS that comprise MS3 under the CPB2.

When the MS4 connecting system, because MS4 inserts by the BTS2 under the RAN2, that is to say that MS4 inserts by the BTS among the different RAN with MS1, share the 2nd GSL link so between PS and PCF2, set up, between PCF2 and BSC2, set up and share the 2nd A8 link, between BSC2 and CPB3, set up to share the transmission link of the 3rd Abis link, set up the 4th dedicated channel of channel of eating dishes without rice or wine between CPB3 under BTS2 and the MS4 as MS4 as MS4.

When the MS5 connecting system, because MS5 and MS4 all insert by the BTS2 under the RAN2, promptly insert by same BTS, so directly share the 2nd GSL link and share the transmission link that the 2nd A8 link is set to MS5, again because the channel resource of MS5 and MS4 coexists on the channel board CPB3, so directly share the transmission link that the 3rd Abis link is set to MS5, just need on CPB3, set up the 5th dedicated channel of channel of eating dishes without rice or wine as MS5.

So far, in system of the present invention, set up the link of each MS in the group 1 that is over.

Fig. 6 is the flow chart of transmission MS voice messaging in the embodiment of the invention 1.Referring to Fig. 4 and Fig. 6, obtaining speaking right with MS1 is example, utilizes the link of each MS in the group 1 that is set up in system of the present invention, and the detailed process of the present invention's voice messaging of transmission MS1 when realizing that PTT is professional may further comprise the steps:

Step 601, MS1 by self dedicated link promptly first channel of eating dishes without rice or wine voice messaging is sent to CPB1 among the BTS1.

Step 602, CPB1 receive voice messaging, by sharing an Abis link this voice messaging are sent to BSC1.

Step 603, BSC1 receive voice messaging, by sharing an A8 link this voice messaging are sent to PCF1.

Step 604, PCF1 receive voice messaging, by sharing a GSL link this voice messaging are sent to PS.

After step 605, PS receive voice messaging, this voice messaging is duplicated 2 parts send to PCF1 among the RAN1 and the PCF2 among the RAN2 by sharing a GSL link and sharing the 2nd GSL link respectively.

Here, PS duplicates voice messaging according to the quantity of the shared GSL link of being set up for group 1, share a GSL link owing between RAN1 and PS, exist, between RAN2 and PS, exist and share the 2nd GSL link, promptly there are 2 shared GSL links, therefore, PS only needs the voice messaging that receives is duplicated 2 parts, duplicates 5 parts of voice messagings according to the quantity of MS in the group 1 and need not to resemble the prior art.

After step 606, PCF1 receive voice messaging, this voice messaging is duplicated 1 part send to BSC1 by sharing an A8 link.

After step 607, BSC1 receive voice messaging, this voice messaging is duplicated 2 parts send to CPB1 and CPB2 among the BTS1 by sharing an Abis link and sharing the 2nd Abis link respectively.

After step 608, CPB1 receive voice messaging, this voice messaging is duplicated 2 parts send to MS1 and MS2 by first channel and second channel of eating dishes without rice or wine of eating dishes without rice or wine respectively; After CPB2 receives voice messaging, this voice messaging is duplicated 1 part send to MS3 by the 3rd channel of eating dishes without rice or wine.

After step 609, PCF2 receive voice messaging, this voice messaging is duplicated 1 part send to BSC2 by sharing the 2nd A8 link.

After step 610, BSC2 receive voice messaging, this voice messaging is duplicated 1 part send to CPB3 among the BTS2 by sharing the 3rd Abis link.

After step 611, CPB3 receive voice messaging, this voice messaging is duplicated 2 parts send to MS4 and MS5 by the 4th channel and the 5th channel of eating dishes without rice or wine of eating dishes without rice or wine respectively.

Need to prove that step 606 is carried out to step 611 simultaneously to step 608 and step 609, and do not have the sequencing in the execution.

In addition, because CPB1 receives voice messaging by sharing an Abis link, CPB1 distinguishes the purpose MS of voice messaging by dedicated link can't be in prior art, therefore CPB1 also can duplicate concurrent sending voice information for MS1, MS1 can avoid causing echo by not receiving or not playback shields the voice messaging that this is sent by self.

So far, MS2 has realized the PTT business to the voice messaging that MS4 receives MS1.

Embodiment 2:

System of the present invention shown in Figure 4 has changed the structure of existing system, if do not change the structure of existing system, promptly utilize each network entity in the existing system shown in Figure 1, the inventive method can reach the purpose of conserve network resources equally when realizing the PTT business.But at this moment, the inventive method is in the agreement of the signaling plane of realizing the PTT business and service surface, increase between PDSN and the PCF and the PTT application protocol between PDSN and the PS, this PTT application protocol definition PDSN and PS can set up shared GSL link alternately by message.The instantiation that the title GSL of shared link described here just enumerates for convenience of description, the shared link between this PDSN and the PS also may be defined as other title.

Fig. 7 is the MS that set up in the embodiment of the invention 2 schematic diagram to link between the PS.Fig. 8 sets up to initiate the flow chart of the MS of group calling to link between the PS in the group in the embodiment of the invention 2.Referring to Fig. 7 and Fig. 8, utilize each network entity in the existing system, when the MS1 in the group 1 initiated group calling by first access network of the CPB1 among the BTS1, the inventive method was set up MS1 and be may further comprise the steps to the detailed process of PS link:

Step 801, MS1 send PTT Call Setup message by common signaling channel and initiate group calling, and CPB1, BSC1, PCF1 and the PDSN1 of this message in BTS1 is forwarded to PS.

Step 802, PS issue Assign Request message, and this message is forwarded to BSC1 through PDSN1 and PCF1.

Step 803, BSC1 send A9-Setup A8 message to PCF1, the A8 link is set up in request, PCF1 sends the A10 link that the foundation of A11-Registration Request message request is shared to PDSN1 after receiving this message, and PDSN1 sends Setup GSL message request to PS again and sets up the GSL link of sharing.

Here, PDSN1 sends Setup GSL message according to the PTT application protocol that self disposes.

Step 804, PS set up a shared GSL link as the shared link of all MS between PS and PDSN1 under the RAN1 after receiving Setup GSL message, and respond SetupGSL Ack message to PDSN1, and expression is shared the GSL link and set up success.

Here, PS sets up a shared GSL link according to the PTT application protocol of self configuration, and sends Setup GSL Ack message to PDSN1.

After step 805, PDSN1 receive Setup GSL Ack message, set up and share an A10 link as the shared link of all MS between PDSN1 and PCF1 under the RAN1, and to PCF1 response A11-Registration Reply message, expression sharing A 10 links have been set up success.

Step 806～step 809 is identical with step 505～step 508.

So far, the present invention utilizes the structure of existing system to set up first access set group network that is over and promptly initiates the MS1 of group calling to the link between the PS.

Next, the present invention utilizes the structure of existing system to set up the link between other MS and PS in the group, this process is identical with the above-mentioned principle of link process of setting up in system of the present invention in the group between other MS and PS, be that MS2 is to MS5 just at other each MS in the group 1, the A10 link of sharing that the present invention need set up is set to MS2 and the transmission link of MS3 between PCF1 and PDSN1, share a GSL link and be set to MS2 and the transmission link of MS3 between PDSN1 and PS, the 2nd A10 link of setting up of sharing is set to MS4 and the transmission link of MS5 between PCF2 and PDSN2, shares the 2nd GSL link and is set to MS4 and the transmission link of MS5 between PDSN2 and PS.

Each shared link that utilization of the present invention is set up in existing system, the process of transmission MS voice messaging is identical with the principle of each shared link transmission MS voice messaging process that utilization shown in Figure 6 is set up in system of the present invention, just, PCF is when receiving the voice messaging that MS sends, by sharing A 10 links this voice messaging is transferred to PDSN, PDSN transfers to PS by sharing the GSL link with this voice messaging, PS transfers to PDSN by sharing the GSL link with the voice messaging of self-replication, and PDSN transfers to PCF by sharing A 10 links with voice messaging again.

By above-mentioned flow process as can be seen, when group call is set up, the inventive method do not resemble the prior art in RAN inside and RAN to being that each MS sets up special-purpose terrestrial links between the PS, but be the terrestrial links that all MS foundation under the same RAN are shared, therefore saved Internet resources greatly.

When realizing that PTT is professional, at up direction, synchronization only need use a link to transmit the voice messaging of MS, at down direction, identical for the voice messaging of each MS distribution, also can transmit by a link, utilize this characteristics, the present invention sets up shared link and passes through the shared link transmitting voice information, thereby has saved Internet resources.In addition, in the present invention, the dedicated link of each MS does not have the difference of essence in described shared link and the prior art, such as, between the BSC and PCF of RAN inside, prior art and the present invention set up is the A8 link, and just prior art has been set up many A8 links of each MS special use, and the present invention has only set up the A8 link that all MS share.

For saving Internet resources, after the PTT of group service ending, the present invention is released to all links that MS sets up in this group.

The method that the present invention proposes is not limited to the MS transferring voice, and when MS transmission data, the inventive method realizes that the process of transmission MS data is identical with the principle of above-mentioned transferring voice process.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. A method for realizing a push-to-talk service, characterized in that, when a connection is established for the first mobile station MS in the group to access the radio access network RAN, the base station controller BSC inside the RAN Establish a transmission link with the base transceiver station BTS, and establish a transmission link between the packet control function entity PCF and the BSC inside the RAN. When subsequent MSs in the group access through the RAN, the RAN The transmission link between the internal PCF and the BSC and the transmission link between the BSC and the BTS are set as shared links within the RAN for the subsequent MS, and the method also includes the following steps:

A. The speaking MS in the group sends the service information to the RAN that it accesses, and the RAN transmits the service information to the cluster server through the shared links established internally and the link between itself and the cluster server ;

B. The cluster server copies the service information, and sends the copied service information to all RANs accessed by the MS in the group;

C. All the RANs send the service information to the MSs in the group through the shared links established internally and the links between themselves and the MSs.

2. The method according to claim 1, wherein the step of establishing a transmission link between the BSC and the BTS comprises: establishing a shared Abis link between the BSC and the first channel board under the BTS, wherein the first A channel board is the channel board where the channel resource of the first MS is located;

The step of establishing the transmission link between the PCF and the BSC includes: establishing a shared A8 link between the PCF and the BSC.

3. The method according to claim 2, wherein when the channel resource of the subsequent MS is allocated on the first channel board inside the RAN accessed by the first MS;

The step of setting the transmission link between the PCF and the BSC and the transmission link between the BSC and the BTS in the RAN as the shared link of the subsequent MS in the RAN includes: setting The shared A8 link established inside the RAN is set as the transmission link between the PCF and the BSC for the subsequent MS, and the shared Abis link established between the BSC and the first channel board is set as the transmission link between the BSC and the BTS for the subsequent MS. transmission link between them.

4. The method according to claim 2, wherein when the channel resources of the subsequent MS are allocated on the second channel board inside the RAN accessed by the first MS;

The step of establishing a transmission link between the BSC and the BTS further includes: establishing a shared Abis link between the BSC inside the RAN and the second channel board under the BTS;

The step of setting the transmission link between the PCF and the BSC and the transmission link between the BSC and the BTS in the RAN as the shared link of the subsequent MS in the RAN includes: setting The shared A8 link established inside the RAN is set as the transmission link between the PCF and the BSC for the subsequent MS, and the shared Abis link established between the BSC and the second channel board is set as the transmission link between the BSC and the BTS for the subsequent MS. transmission link between them.

5. The method according to claim 3 or 4, wherein the RAN further includes a Packet Data Serving Node (PDSN);

When establishing a connection for the first MS, the method further includes: within the RAN, establishing a shared A10 link between the PCF and the PDSN;

The step of setting the transmission link between the PCF and the BSC and the transmission link between the BSC and the BTS in the RAN as the shared link of the subsequent MS in the RAN further includes: The shared A10 link established inside the RAN is set as the transmission link between the PCF and the PDSN for the subsequent MS.

6. The method according to claim 3 or 4, wherein the RAN is connected to the cluster server through an internal PCF;

In step A, the link between the RAN and the cluster server is a link between the PCF inside the RAN and the cluster server;

In step A, the step of the RAN transmitting service information through internally established shared links specifically includes:

A11. The BTS in the RAN receives the service information sent by the speaking MS, and transmits the service information to the BSC through the shared Abis link between the channel board where the channel resource of the speaking MS is located and the BSC;

A12. The BSC transmits service information to the PCF through the shared A8 link between itself and the PCF;

In step C, the step of the RAN sending service information through the internally established shared links specifically includes:

C11. The PCF inside the RAN receives the service information sent by the cluster server, and transmits the service information to the BSC through the shared A8 link between itself and the BSC;

C12. The BSC transmits service information to the BTS through each shared Abis link between itself and each channel board under the BTS.

7. The method according to claim 5, wherein the RAN is connected to the cluster server through an internal PDSN;

In step A, the link between the RAN and the cluster server is a link between the PDSN inside the RAN and the cluster server;

A21. The BTS in the RAN receives the service information sent by the speaking MS, and transmits the service information to the BSC through the shared Abis link between the channel board where the channel resource of the speaking MS is located and the BSC;

A22. The BSC transmits service information to the PCF through the shared A8 link between itself and the PCF;

A23. The PCF transmits service information to the PDSN through the shared A10 link between itself and the PDSN;

C21. The PDSN inside the RAN receives the service information sent by the cluster server, and transmits the service information to the PCF through the shared A10 link between itself and the PCF;

C22. The PCF transmits service information to the BSC through the shared A8 link between itself and the BSC;

C23. The BSC transmits service information to the BTS through each shared Abis link between itself and each channel board under the BTS.

8. The method according to claim 1, further comprising: establishing a dedicated link for each MS between each MS in the group and the RAN it accesses;

In step A, the speaking MS sends service information through its own dedicated link;

In step C, all RANs accessed by MSs in the group send service information through dedicated links of each MS.

9. The method according to claim 1, further comprising: releasing all links established for MSs in the group after the call of the group ends.

10. The method according to claim 1, wherein the service information is voice information or data information.

11. A system for realizing the push-to-talk service, including each mobile station MS in the group, a radio access network RAN and a cluster server, wherein the RAN includes a base transceiver station BTS and a base station controller BSC and the group control functional entity PCF, the PCF is directly connected to the cluster server through the Act protocol;

When the first MS accesses the system through its own RAN, the BTS establishes a shared link with the BSC; The shared link established between them sends the service information to the BSC; and when receiving the service information from the BSC, sends the service information to each MS connected through itself;

When the first MS accesses the system through its own RAN, the BSC establishes a shared link with the PCF; and after receiving the service information sent by the BTS, through the established The shared link sends the service information to the PCF; and when receiving the service information from the PCF, sends the service information to the BTS through the shared link between itself and the BTS;

When the first MS accesses the system through its own RAN, the PCF establishes a shared link with the cluster server; The established shared link sends the service information to the cluster server; and when receiving the service information from the cluster server, sends the service information to the BSC through the established shared link between itself and the BSC;

After receiving the service information sent by the PCF, the cluster server copies the service information according to the number of shared links between itself and each PCF, and sends the copied service information to each PCF through each shared link.