CN1713752A - A method for realizing push-to-talk service - Google Patents

Abstract

The method includes following step: when mobile station (MS) in cluster firstly accessing radio access network (RAN) builds a connection, a shared link is built between RAN and cluster server; when the next MS in cluster accesses network through RAN, the built shared link is configured as the transmission link between the next MS and cluster serve. The method also includes: the speaking MS in cluster transmits the service message to RAN, the RAN transmits it to cluster server through shared link; the cluster server copies the service massage and transmits the copied service message to all RAN accessed by MS in cluster through the share link according to numbers of shared links

Description

A method for realizing push-to-talk service

technical field

The invention relates to trunking communication technology, in particular to a method for realizing a push-to-talk service.

Background technique

In trunking communication, Push-to-Talk (PTT) refers to "point-to-point" and "point-to-multipoint" voice communication services of real-time direct connection. The PTT service uses a half-duplex communication method, that is, only one person is allowed to speak at the same time, and other people can only receive the voice information of the speaker. Using the PTT service, the caller can initiate a call to a person or a group of people by simply pressing a button without dialing and waiting for the other party to pick up the phone. Collaborative work and communication among other groups.

Based on the feature of "push to talk", PTT has higher requirements for access delay than ordinary telephones. At the same time, due to the "half-duplex" communication characteristics of PTT, it is generally necessary to use a dedicated network or transform it on the basis of the original telephone network to develop into a dedicated trunking network.

FIG. 1 is a schematic diagram of a cluster network for implementing PTT services in the prior art. Referring to Fig. 1, in a cluster network implementing PTT services, a mobile station (MS) in a group is connected to a cluster server (PTT Server) through one or more radio access networks (RAN). The RAN may be an integrated entity, or an entity including multiple devices such as a Base Station Controller (BSC) and a Packet Control Function (PCF). Therefore, in order to distinguish, in the cluster network shown in Figure 1, RAN1 is an integrated entity, and RAN2 includes two network entities of BSC and PCF. Here, taking the cluster network structure shown in FIG. 1 as an example, how the prior art establishes links from each MS to the PTT Server and realizes the PTT service.

Referring to FIG. 1 , MS1 to MS5 belong to the same group, which is denoted as group 1 . MS1 and MS2 access the cluster network through RAN1, and MS3, MS4, and MS5 access the cluster network through RAN2.

Fig. 2 is a flow chart of establishing links from each MS to the PTT Server in the prior art. Referring to Fig. 1 and Fig. 2, when the call of group 1 is set up, such as MS1 to MS5 accesses sequentially, so in the prior art, the specific process of establishing each MS in group 1 to the PTT Server link comprises the following steps:

Step 201: MS1 accesses RAN1, establishes link 10 between MS1 and RAN1 as a dedicated link for MS1, and then establishes link 11 between RAN1 and PTT Server as a dedicated link for MS1.

Step 202: MS2 accesses RAN1, establishes link 20 between MS2 and RAN1 as a dedicated link for MS2, and then establishes link 21 between RAN1 and the PTT Server as a dedicated link for MS2.

Step 203: MS3 accesses RAN2, establishes link 30 between MS3 and RAN2 as a dedicated link for MS3, establishes link 30' between BSC and PCF inside RAN2 as a dedicated link for MS3, and then establishes a link 30' between RAN2 and RAN2 as a dedicated link for MS3. A link 31 is established between the PTT Servers as a dedicated link for MS3.

Step 204: MS4 accesses RAN2, establishes link 40 between MS4 and RAN2 as a dedicated link for MS4, establishes link 40' between BSC and PCF inside RAN2 as a dedicated link for MS4, and then establishes a link 40' between RAN2 and RAN2 as a dedicated link for MS4. A link 41 is established between the PTT Servers as a dedicated link of MS4.

Step 205: MS5 accesses RAN2, establishes link 50 between MS5 and RAN2 as a dedicated link for MS5, establishes link 50' between BSC and PCF inside RAN2 as a dedicated link for MS5, and then establishes a link 50' between RAN2 and RAN2 as a dedicated link for MS5. Link 51 is established between PTT Servers as a dedicated link of MS5.

So far, the link from each MS in group 1 to the PTT Server has been established, and RAN1, RAN2, and PTT Server will store relevant link and group information internally. for example,

Stored inside RAN1: the group number is group 1, the accessed MSs are MS1 and MS2, link 10 and link 11 are dedicated links for MS1, and link 20 and link 21 are dedicated links for MS2 . Stored inside RAN2: the group number is group 1, the accessed MSs are MS3, MS4 and MS5, link 30, link 30' and link 31 are dedicated links for MS3, link 40, link 40' and link 41 are dedicated links for MS4, and links 50, 50' and link 51 are dedicated links for MS5. Stored inside the PTT Server: the group number is group 1, the connected MSs are MS1 to MS5, link 11, link 21, link 31, link 41 and link 51 are dedicated to MS1 to MS5 respectively link.

Fig. 3 is a flow chart of transmitting MS voice information when implementing a PPT service in the prior art. Referring to Fig. 1 and Fig. 3, take the MS5 in the group 1 to obtain the right to speak as an example, in the prior art, the specific process of utilizing the dedicated link of each MS established to transmit MS5 voice information includes the following steps:

Step 301: MS5 sends its own voice information to RAN2 through its dedicated link, namely link 50.

Step 302: The BSC in RAN2 receives the voice information through the link 50, and knows that the voice information is sent by MS5, then sends the voice information to the PCF through the dedicated link of MS5, that is, the link 50'.

Here, the BSC knows that the voice information is sent by MS5 according to the relevant link information stored inside, that is, the link 50 is a dedicated link of MS5.

Step 303: PCF receives the voice information by the link 50', and knows that the voice information is sent by MS5, then sends the voice information to the PTT Server through the dedicated link of MS5, that is, the link 51.

Step 304: PTT Server receives the voice information through link 51, and knows that the voice information is sent by MS5, and then PTT Server copies the voice information of MS5 into 4 copies, respectively through link 11, link 21, and link 31 and link 41 to send out.

Here, after the PTT Server receives the voice information through the link 51, according to the relevant link and group information stored internally, that is, the link 51 is a dedicated link for MS5, and MS5 belongs to group 1, which also includes MS1 To MS4, and know that the voice information is sent by MS5 in group 1, therefore, PTT Server copies 4 copies of voice information for other MSs in group 1, and sends them out through the corresponding link.

Step 305: After RAN1 receives the voice information through link 11, it knows that the voice information should be sent to MS1, so it sends the voice information to MS1 through link 10, and after RAN1 receives the voice information through link 21, it knows the voice information The message should be sent to MS2, so the voice message is sent over link 20 to MS2.

Inside RAN2, after PCF receives the voice information through the link 31, it knows that the voice information should be sent to MS3, so it sends the voice information to the BSC through the link 30', and the BSC sends the voice information to the MS3 through the link 30. After receiving the voice information through the link 41, MS3; PCF knows that the voice information should be sent to MS4, so it sends the voice information to the BSC through the link 40', and the BSC sends the voice information to MS4 through the link 40.

So far, each MS has received the voice information, realizing the PTT service.

If MSs in multiple groups access the cluster network through the same RAN and perform PTT services at the same time, in the prior art, the RAN and PTT Server distinguish the links and voice information of each group according to the relevant information stored internally . Fig. 4 is a schematic diagram of two groups simultaneously accessing the cluster network in the prior art. Here, the network structure shown in FIG. 4 is taken as an example to illustrate how the prior art realizes providing PTT services for different groups simultaneously.

Referring to Figure 4, for example, when the PTT service of group 1 is in progress, the call of group 2 is established, and the terminals MS6 and MS7 in group 2 access the trunking network through RAN1, then the link with each MS in group 1 is established. In the prior art, when MS6 accesses, link 60 is established between MS6 and RAN1 as a dedicated link for MS6, and link 61 is established between RAN1 and PTT Server as a dedicated link for MS6. When MS7 accesses, link 70 is established between MS7 and RAN1 as a dedicated link for MS7, and link 71 is established between RAN1 and PTT Server as a dedicated link for MS7. Correspondingly, RAN1 and PTT Server store relevant information of group 2.

Therefore, when voice information arrives at RAN1 and PTT Server, RAN1 and PTT Server distinguish the voice information of group 1 and group 2 according to the link of the received voice information and the related information stored inside, and pass the corresponding link to transfer.

It can be seen that, in a cluster network, there are the following disadvantages in implementing the PTT service using links established in the prior art:

1. In the prior art, the same number of links as the number of MSs in the group is established between the RAN and the PTT Server, so a large amount of network bandwidth will be occupied. Moreover, if the RAN includes multiple network entities, the existing technology also needs to establish links with the same number of MSs under the RAN between every two directly connected network entities in the RAN. When there are many network entities in the RAN When , the number of links established inside the RAN will increase greatly, thus greatly consuming network bandwidth and wasting network resources.

2. Since the PTT service is mostly used for collaborative work and communication between teams, work groups and other groups, it is required that other people can receive the voice information of the speaker in time when one person is speaking, so the synchronization requirements for the voice information to reach each MS very high. But in the prior art, at first, PTT Server sends out the voice information of duplicating separately through the dedicated link of each MS between RAN, because the speed of transmission voice information of each MS dedicated link is different, therefore, in from PTT Server To the RAN, there is a difference in transit time once. When the RAN sends the voice information to each MS through the dedicated link of each MS, there is another transmission time difference due to the difference of the transmission links. And, if there are multiple network entities inside the RAN, every two network entities inside the RAN transmit voice information through the dedicated link of each MS, so there is a transmission time difference between every two network entities, and The more network entities there are, the greater the difference in transmission time of voice information within the RAN. Therefore, when the RAN is closely connected and does not include multiple network entities, the existing technology has two transmission time differences when transmitting voice information. When the RAN includes multiple network entities, the prior art transmits voice information at least There are three transmission time differences, and the more network entities in the RAN, the greater the transmission time difference, so the time interval for the voice information of the speaker to reach each MS is very large, which is not conducive to the realization of each MS receiving voice information. synchronicity.

3. In the prior art, the PTT Server needs to copy a copy of the voice information for each MS except the MS that has obtained the right to speak, and distribute the copied voice information through the dedicated link of each MS, so when the MS's When the number is large, higher requirements are placed on the processing speed and processing capacity of the PTT Server, which in turn increases the cost of the cluster network.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for realizing the push-to-talk service, which can greatly save network resources.

In order to achieve the above object, the technical solution of the present invention is achieved in that:

A method for realizing a push-to-talk service. When establishing a connection for the first MS in a group to access a RAN, a shared link of the group is established between the RAN and a cluster server. In the group When the subsequent MS accesses through the RAN, the established shared link is set as the transmission link between the RAN and the cluster server for the subsequent MS in the group, and the method also includes the following steps:

A. The speaking MS in the group sends the service information to the RAN accessed by itself, and the RAN sends the service information to the cluster server through the shared link of the group;

B. The cluster server copies the service information according to the number of shared links of the group established between itself and the RAN, and then sends the copied service information to the group through each shared link of the group All RANs accessed by the MS in the middle;

C. All RANs accessed by the MSs in the group send the service information sent by the cluster server to the MSs in the group respectively.

When the RAN includes multiple network entities, the method further includes: when establishing a connection for the first MS in the group that accesses the RAN, between every two directly connected network entities in the RAN establish a shared link for the group;

Step A includes: the speaking MS in the group sends the service information to the network entity directly connected to the MS in the RAN which it accesses, and the network entity directly connected to the MS receives the service information, and sends the service information through the RAN The shared link of the group established internally transmits the service information to the network entity directly connected to the cluster server inside the RAN, and the network entity directly connected to the cluster server passes the shared link of the group between the RAN and the cluster server The link sends business information to the cluster server;

Step C includes: within the RAN that the MS accesses in the group, the network entity that receives the service information from the cluster server transmits the service information to the RAN and the group via the shared link established within the RAN. The network entity directly connected to the MS in the group, and the network entity directly connected to the MS sends the service information to the MS in the group.

When the push-to-talk service is applied in a code division multiple access (CDMA) system, a shared A8 link is established between every two directly connected network entities inside the RAN.

When the RAN includes two network entities, a base station controller BSC and a packet control function entity PCF, and the BSC is directly connected to the MS, and the PCF is directly connected to the cluster server,

Step A includes: the speaking MS in the group sends the service information to the BSC that it accesses, and the BSC transmits the service information to the PCF through the shared A8 link, and the PCF then communicates with the group server through the The shared link sends business information to the cluster server;

Step C includes: the PCF receives the service information from the cluster server, transmits the service information to the BSC through the shared A8 link, and the BSC sends the service information to the MSs in the group.

When the push-to-talk service is applied in a CDMA system, a shared GMP link is established between the RAN and the cluster server.

After receiving the service information in step C, the RAN copies and distributes the service information according to the number of MSs accessed through it in the group.

When the call of the group ends, the method further includes: releasing all the links established for the MSs in the group.

The service information is voice information or data information.

The method further includes: when MSs in multiple groups access through the same RAN, respectively establish shared links of each group between the RAN and the cluster server, and service information of each group passes through respective shared links road for transmission.

The method further includes: when the MSs in the group access the cluster network through the RAN, establishing a dedicated link for each MS between the MSs in the group and the RAN they access;

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.

Visible, the method that the present invention proposes has the following advantages:

1. Between a RAN and the PTT Server, the present invention does not establish a dedicated link for each MS, but only establishes a shared link, and the voice information of all MSs under the RAN is transmitted through the shared link, so even if There are many MSs in the RAN, and only one link is needed between the RAN and the PTT Server, thus greatly saving network bandwidth and network resources. Moreover, if the RAN includes a plurality of network entities, the present invention only needs to establish a shared link between every two directly connected network entities within the RAN, and does not need to establish a link in the RAN according to the number of MSs under the RAN. A dedicated link for each MS is established between every two internal network entities, thus further saving network bandwidth, saving network resources, and improving system capacity.

2. In the present invention, since the PTT Server sends the copied voice information to the RAN through a shared link, there is no problem of transmission time difference when the voice information is transmitted from the PTT Server to the RAN. If there are multiple network entities inside the RAN, since every two network entities also use a shared link to transmit voice information, no matter how many network entities there are in the RAN, there will be no problem of transmission time difference for voice information within the RAN . When the RAN sends the voice information to each MS through the dedicated link of each MS, due to the difference of the transmission links, there is a difference in transmission time. In a word, in the whole voice information transmission process, there is only one transmission time difference, so that the time interval for the speaker's voice information to reach each MS is very small, which is more conducive to realizing the synchronization of the voice information received by each MS.

3. In the present invention, the PTT Server does not need to copy a copy of voice information for each MS, but only needs to copy and distribute the voice information according to the number of shared links, that is, the number of RANs, and the number of RANs is far Far less than the number of MSs under RAN, therefore, the requirements on the processing speed and processing capacity of the PTT Server are reduced, thereby reducing the cost of the cluster network.

Description of drawings

FIG. 1 is a schematic diagram of a cluster network for implementing PTT services in the prior art.

Fig. 2 is a flow chart of establishing links from each MS to the PTT Server in the prior art.

Fig. 3 is a flow chart of transmitting MS voice information when implementing a PPT service in the prior art.

Fig. 4 is a schematic diagram of two groups simultaneously accessing the cluster network in the prior art.

FIG. 5 is a schematic diagram of a cluster network for implementing PTT services in the present invention.

Fig. 6 is the flowchart of setting up each MS to PTT Server link in the present invention.

Fig. 7 is a flow chart of transmitting MS voice information when implementing PPT service in the present invention.

Fig. 8 is a schematic diagram of two groups simultaneously accessing the cluster network in the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

When a group call is established, the present invention establishes a dedicated link for each MS between the MS and the RAN, which is the same as the prior art. The difference is that in the prior art, a dedicated terrestrial link is also established for each MS within the RAN and between the RAN and the PTT Server, while the present invention is under the same RAN within the RAN and between the RAN and the PTT Server All MSs establish a shared terrestrial link.

FIG. 5 is a schematic diagram of a cluster network for implementing PTT services in the present invention. Below in conjunction with the cluster network structure shown in Figure 5, explain how the present invention establishes the link of each MS to the PTT Server and realizes the PTT service.

Referring to FIG. 5 , MS1 to MS5 belong to the same group, which is denoted as group 1 . MS1 and MS2 access the cluster network through RAN1, RAN1 is an integrated entity, MS3, MS4, and MS5 access the cluster network through RAN2, and RAN2 includes two network entities, BSC and PCF.

Fig. 6 is the flowchart of setting up each MS to PTT Server link in the present invention. Referring to Fig. 5 and Fig. 6, in the present invention, when the call of group 1 is set up, such as MS1 to MS5 accesses sequentially, so the present invention establishes each MS in group 1 to the specific process of PTT Server link comprising the following steps :

Step 601: MS1 accesses, establishes a dedicated link A for MS1 between MS1 and RAN1, and establishes a shared link M1 between RAN1 and the PTT Server.

Step 602: MS2 accesses, establishes a dedicated link B for MS2 between MS2 and RAN1, and directly sets the shared link M1 as the link between MS2 between RAN1 and the PTT Server.

Here, since MS1 and MS2 belong to the same group 1, they both access the cluster network through RAN1, and a shared link M1 has been established between RAN1 and PTT Server, so MS2 is no longer established separately between RAN1 and PTT Server link between.

Step 603: MS3 accesses, establishes a dedicated link C for MS3 between MS3 and RAN1, and establishes a shared link M2 between the BSC and PCF inside RAN2, and then establishes a shared link between RAN2 and the PTT Server M3.

Step 604: MS4 accesses, establishes the dedicated link D of MS4 between MS4 and RAN2, directly sets the shared link M2 as the internal link of MS4 in RAN2, and sets the shared link M3 as the link between MS4 between RAN2 and the PTT Server link between.

Here, because MS4 and MS3 belong to the same group 1, they both access the cluster network through RAN2, and a shared link M2 has been established between the BSC and PCF inside RAN2, and between RAN2 and the PTT Server The shared link M3 is established, so the link within RAN2 or between RAN2 and the PTT Server is no longer separately established for MS4.

Step 605: MS5 accesses, establishes the dedicated link E of MS5 between MS5 and RAN2, directly sets the shared link M2 as the internal link of MS5 in RAN2, and sets the shared link M3 as the link between MS5 and RAN2 and the PTT Server link between.

Here, since MS5, MS3 and MS4 belong to the same group 1, they all access the cluster network through RAN2, and a shared link M2 has been established between the BSC and PCF inside RAN2, and between RAN2 and the PTT Server The shared link M3 has also been established, so the link within RAN2 or between RAN2 and the PTT Server is no longer separately established for MS5.

So far, the present invention has established the links of the MSs in the group 1. RAN1, RAN2 and PTT Server will store relevant link and group information internally. for example,

RAN1 internally saves: the group number is group 1, the connected MSs are MS1 and MS2, link A and link B are dedicated links for MS1 and MS2 respectively, and shared link M1 is the link between RAN1 and MS2. Transmission link between PTT Servers. RAN2 internally saves: the group number is group 1, the connected MSs are MS3, MS4 and MS5, link C, link D and link E are dedicated links of MS3, MS4 and MS5 respectively, shared links M2 and shared link M3 are transmission links within RAN2 and between RAN2 and PTT Server for MSs in group 1, respectively. The PTT Server internally stores: the group number is group 1, the connected MSs are MS1 to MS5, the shared link M1 is the transmission link between RAN1 and PTT Server of group 1, and the shared link M3 is the group 1 Transmission link between RAN2 and PTT Server.

Fig. 7 is a flow chart of transmitting MS voice information when realizing PPT service in the present invention. Referring to Fig. 5 and Fig. 7, take MS5 to obtain speaking right as example, utilize the link of each MS in the group 1 that is established, the concrete process that the present invention transmits the voice information of MS5 when realizing PTT service comprises the following steps:

Step 701: MS5 sends its own voice information to RAN2 through its dedicated link, link E.

Step 702: The BSC in RAN2 receives the voice information, and sends the voice information to the PCF through the shared link M2.

Here, after the BSC in RAN2 receives the voice information through the link E, according to the relevant link and group information stored internally, that is, the link E is a dedicated link for MS5, and MS5 belongs to group 1, and it is known that the voice information is It is sent by MS5 in group 1, therefore, the voice information is sent through the shared link M2 established for group 1.

Step 703: The PCF then sends the received voice information to the PTTServer through the shared link M3.

Step 704: After receiving the voice information, the PTT Server makes two copies of the voice information and sends them to RAN1 and RAN2 respectively through the shared link M1 and the shared link M3.

Here, the PTT Server receives the voice information through the shared link M3, and according to the related link and group information stored internally, that is, the shared link M3 is the transmission link of group 1, and group 1 also includes MS1 to MS4, Therefore, the PTT Server replicates the voice information for the MSs in group 1. And, PTT Server duplicates voice information according to the number of established shared links. Since there is a shared link M1 between RAN1 and PTT Server, and there is a shared link M3 between RAN2 and PTT Server, that is, there are 2 shared links, therefore, PTT Server only needs to copy 2 copies of the received voice information .

Step 705: After receiving the voice information, RAN1 makes two copies of the voice information and sends them to MS1 and MS2 through link A and link B respectively.

In RAN2, after PCF receives the voice information, it sends the voice information to BSC through shared link M2, and BSC copies 3 copies of the received voice information to MS3 respectively through link C, link D and link E , MS4 and MS5.

Here, since the BSC receives the voice information through the shared link M2, the BSC cannot distinguish the destination MS of the voice information through a dedicated link as in the prior art, so the BSC will also copy and send the voice information for MS5, and MS5 can Shield the voice information sent by itself by not receiving or not playing the sound, so as to avoid causing echo.

So far, MS1 to MS4 have received the voice information of MS5, realizing the PTT service.

If MSs in multiple groups access the cluster network through the same RAN and perform PTT services at the same time, in the present invention, the RAN and PTT Server distinguish the voices of each group according to the relevant links and group information stored internally. information. Fig. 8 is a schematic diagram of two groups simultaneously accessing the cluster network in the present invention. Next, taking the network structure shown in FIG. 8 as an example, how the present invention realizes providing PTT services for different groups at the same time.

Referring to Fig. 8, for example, when the PTT service of group 1 is in progress, the call of group 2 is established, and the terminals MS6 and MS7 in group 2 access the trunking network sequentially through RAN1, then each of the group 1 is established with the above-mentioned present invention. The principle of the link process of MS is the same. When MS6 accesses, the present invention establishes link F between MS6 and RAN1 as a dedicated link of MS6, and establishes a shared link N1 between RAN1 and PTT Server. When MS7 accesses, link G is established between MS7 and RAN1 as a dedicated link of MS7, and the shared link N1 is directly set as a link between RAN1 and PTTServer for MS7.

Correspondingly, RAN1 and PTT Server store relevant information of group 2. For example, RAN1 internally stores: the group number is group 2, the accessed MSs are MS6 and MS7, link F and link G are dedicated links for MS6 and MS7 respectively, and shared link N1 is the Transmission link between RAN1 and PTT Server. Stored inside the PTT Server: the group number is group 2, the accessed MSs are MS6 and MS7, and the shared link N1 is the transmission link between RAN1 and the PTT Server of group 2.

Therefore, when the PTT service of group 1 is in progress, if the voice information of an MS in group 2, such as the voice information of MS6, arrives at RAN1 through link F, RAN1 stores the information according to the link F and the internal storage of the received voice information. If it knows that the voice information is sent by MS6 in group 2, it sends the voice information to PTT Server through the shared link N1 established for group 2; PTT Server receives the voice information based on Shared link N1 of the shared link N1 and related information stored inside, knowing that the voice message is sent by the MS in group 2, then send the copied voice message to RAN1 through the shared link N1 established for group 2; RAN1 Based on the shared link N1 receiving the voice information and related information stored inside, it is known that the voice information should be sent to each MS in group 2, so as to complete the distribution and realize the PTT service of group 2.

In order to save network resources, when the PTT service of the group ends, the present invention releases all the links established for the MSs of the group.

In the present invention, when the above-mentioned PTT service is applied in a Code Division Multiple Access (CDMA) system, all shared links established inside RAN2 can be shared A8 links, and all shared links established between RAN1 or RAN2 and the PTT Server The shared link may be a shared GMP link.

The method proposed by the present invention is not limited to the user transmitting voice through the MS. When the user transmits data through the MS, the process of transmitting MS data by the method of the present invention is the same as the principle of the above-mentioned voice transmission process.

In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1, a kind of method that realizes press-and-talk business, it is characterized in that, when the mobile station MS for first access wireless access network RAN in this group connects, between this RAN and cluster server, set up the shared link of this group, when follow-up MS inserts by this RAN in this group, the shared link of being set up is set to the transmission link of follow-up MS between this RAN and cluster server in this group, and this method is further comprising the steps of:

The MS that makes a speech in A, the described group sends to the RAN that self inserts with business information, and this RAN is sent to cluster server by the shared link of described group with business information;

B, cluster server are according to the quantity duplication service information of the shared link of described group between self and the RAN that have set up, and each the bar shared link by described group sends to all RAN that MS inserts in the described group with the business information of duplicating then;

The business information that all RAN that MS inserts in C, the described group send cluster server sends to the MS in this group respectively.

2, method according to claim 1, it is characterized in that, when described RAN inside comprises a plurality of network entity, this method further comprises: when the MS for first access RAN in the described group connects, set up the shared link of this group between per two network entities that directly link to each other of this RAN inside;

Steps A comprises: the MS that makes a speech in the described group sends to business information the network entity that the RAN inside self inserted and this MS directly link to each other, after should receiving business information with the network entity that MS directly links to each other, by the shared link of inner this group that sets up of this RAN with business information transfer to this RAN inner with the direct-connected network entity of cluster server, should and the direct-connected network entity of cluster server by the shared link of this group between this RAN and the cluster server business information is sent to cluster server again;

Step C comprises: the RAN inside that MS inserts in described group, the network entity that receives the business information that cluster server sends by at the inner shared link of setting up of this RAN business information is transferred to this RAN inner with this group in the direct-connected network entity of MS, should again business information be sent to MS in this group with the direct-connected network entity of MS.

3, method according to claim 2 is characterized in that, when described press-and-talk business was applied in the CDMA systems, what set up between inner per two network entities that directly link to each other of RAN was sharing A 8 links.

4, method according to claim 3 is characterized in that, when described RAN inside comprises base station controller BSC and two network entities of Packet Control Function entity PCF, and BSC directly links to each other with MS, when PCF directly links to each other with cluster server,

Steps A comprises: the MS that makes a speech in the described group sends to business information the BSC that self inserts, this BSC transfers to PCF by sharing A 8 links with business information, this PCF again by and cluster server between the shared link of this group business information is sent to cluster server;

Step C comprises: PCF receives the business information that cluster server is sent, and by sharing A 8 links business information is transferred to BSC, and BSC sends to business information the MS in this group again.

5, method according to claim 1 is characterized in that, when described press-and-talk business was applied in the cdma system, what set up between RAN and cluster server was to share the GMP link.

6, method according to claim 1 is characterized in that, after the RAN described in the step C receives business information, duplicates and distribution service information according to the quantity of the MS by its access in this group.

7, method according to claim 1 is characterized in that, behind the end of calling of described group, this method further comprises: be released to all links that MS set up in this group.

8, method according to claim 1 is characterized in that, described business information is voice messaging or data message.

9, method according to claim 1, it is characterized in that, this method further comprises: when the MS in a plurality of groups inserts by same RAN, set up the shared link of each group between this RAN and cluster server respectively, the business information of each group shared link by is separately respectively transmitted.

10, method according to claim 1 is characterized in that, this method further comprises: when the MS in the described group passes through RAN access set group network, set up the dedicated link of each MS between the RAN of each MS and its access in this group;

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.

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