WO2009012629A1

WO2009012629A1 - A method for realizing roaming of cdma digital trunked traditional group calling

Info

Publication number: WO2009012629A1
Application number: PCT/CN2007/003487
Authority: WO
Inventors: Jinlei Zhu; Li Song; Fang Wang
Original assignee: Zte Corporation
Priority date: 2007-07-24
Filing date: 2007-12-07
Publication date: 2009-01-29
Also published as: CN101094526A; CN101094526B

Abstract

A method for realizing roaming of CDMA digital trunked traditional group calling is disclosed in the present invention, which includes enhanced paging and traditional calling, thereinto, a master trunked system brings the enhanced paging mode into the CDMA digital trunked traditional group calling, and accesses a un-roaming user which home area belongs to the group into the trunked group calling in the traditional mode, and accesses other group users that are roaming in a visited area into the traditional group calling in the enhanced mode. The method can fully utilize the system characteristic and satisfies the mobility of user and the require of whole network calling and reduces occupied cell resources in roaming area by the enhanced paging for users in the roaming area in the traditional calling.

Description

Method for realizing roaming of traditional group call by code division multiple access digital cluster

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method for implementing roaming in a CDMA (Code Division Multiple Access) digital cluster conventional group call. Background technique

Mobile communication technology has been developed to the third generation, in which cluster communication is increasingly becoming an indispensable communication service. Cluster communication refers to a dedicated scheduling communication method, including dedicated command and dispatch communication. In use, cluster users can simultaneously Join the call, and the call is made in simplex or half-duplex mode.

There are two main methods for call process control of the existing CDMA digital trunking system: One method is to separately allocate an air channel for each cluster user terminal when the call is made into a cluster, and the user terminal is pressed according to the existing CDMA2000 IX normal voice. The paging mode of the call, that is, paging the incoming call according to the IMSI (International Mobile Subscriber Identity), and assigning the channel to the terminal when the terminal accesses the call also adopts the channel allocation mode of the ordinary voice call. Therefore, such a cluster call can break through the geographical limitation by separately allocating channels, and realize the roaming function, which is different from the existing professional cluster call, which is called an enhanced group call. According to this group call mode, the air interface channel resource occupancy is related to the number of group users. If the number of users is N, the channel usage number is 2N+1. In addition, during the call setup process, the enhanced group call is paged in IMSI mode (enhanced mode), and the user terminal pages the incoming call one by one, which inevitably increases the call connection time. Therefore, with the control method of the group call, the occupation of the air interface resource grows linearly with N, the connection time is long, the resources are occupied, and the capacity is limited. Especially in the place where the group users are concentrated, such as a large sports meeting, a large number of users need to be accessed at the same time. This enhanced group call method is unlikely to meet the requirements.

Another method is: when performing a trunking call, the network side sends a paging request carrying a group identifier (GID, Group ID) to all base station controllers in the group scheduling service area, and the base station controller receives the paging After the request, it is notified that all the transceivers establish a shared forward traffic channel and a shared reverse traffic channel, and the base station controller periodically broadcasts and sends the group identity addressing on the paging channel after the wireless channel is successfully established. Call message, the terminal belonging to the group is based on the message in the paging message Information, capturing the forward traffic channel established for the group, automatically in the access group. This type of call is referred to herein as a traditional group call.

This traditional group call uses channel sharing in the way of channel resource allocation, which solves the problem of cell capacity limitation and call connection time of the digital trunking system. However, in the group call mode, in order to avoid waste of radio resources, the shared channel resources are established in a limited number of cells, and the call mode is not supported for roaming users, and the mobility of some users cannot be satisfied. Network call requirements. Summary of the invention

The technical problem to be solved by the present invention is to provide a method for implementing roaming in a conventional group call of a CDMA digital trunk, which solves the problem that the conventional group call cannot provide roaming in the prior art.

In order to solve the above problems, the present invention provides a method for implementing roaming of a conventional group call of a code division multiple access digital trunk, including enhanced paging and a traditional call, and a master group of a master cluster system in a code division multiple access digital cluster The enhanced paging mode is introduced in the call, and the non-roaming users belonging to the group are added to the cluster group call in a traditional manner, and the other group members roaming in the visited place are enhanced in an enhanced manner. Group call.

The group members roaming at the visited place include: a calling user and/or a called user.

Further, the method includes the following steps:

(a) The roaming calling user initiates a cluster group call request, and the scheduling subsystem of the calling location visits the user through the calling home scheduling subsystem to discover that the user is roaming; the calling sub-location scheduling subsystem Forwarding the cluster group call request to the calling home scheduling subsystem, and the calling home scheduling subsystem becomes the control point of the current cluster call;

(b) The calling home scheduling subsystem re-authenticizes the trunking call, and obtains the group information of the current group call and the information of all users;

(c) The calling home scheduling subsystem adds the non-roaming user belonging to the group to the group in the traditional manner, and adds the roaming calling user in an enhanced manner. The mouth is called into the group.

Further, the method includes the following steps: (1) The calling user initiates a cluster group call request at the home location, and the calling home scheduling subsystem authenticates the user and the call, and obtains the group information of the current cluster group call and the information of all users;

(2) The calling home scheduling subsystem adds the non-roaming users whose calling party belongs to the group to the current group group call in the traditional way, and at the same time, the other group members roaming in the visiting place are enhanced. Join the group call.

Further, the step (c) further includes: if there are other group members other than the calling party roaming in the field, adding the roaming called user to the group call in an enhanced manner.

Further, in step (a), after receiving the cluster group call request of the roaming user, the scheduling server of the calling location scheduling subsystem detects the user through the visited scheduling register and the calling home scheduling register. Right, obtain user information and group information, and determine that the user is in a roaming state, and then forward the cluster group to the dispatch server of the calling home.

Further, in step (b), the calling home scheduling server re-initiates the authentication, and obtains group information and all user information from the calling home scheduling register.

Further, the process of adding the non-roaming user belonging to the group to the group in the traditional manner is as follows: the scheduling server of the calling home sends the traditional paging to the home base station. a controller, paging a member of the home group in the group; the home base station controller sends a paging response message to the home scheduling server, and the non-roaming user at the home automatically responds to the paging forwarded by the home base station controller, Successfully access the call.

Further, the implementation process of adding the group call in an enhanced manner is as follows: The calling home scheduling server pages the roaming user in an enhanced manner by the visited scheduling server and the visited base station controller, and the roaming user controls through the visited base station. And the visited dispatcher sends an enhanced paging response to the calling home scheduling server, so that the roaming user successfully accesses the call.

The method of the present invention introduces an enhanced paging mode in a CDMA digital trunking conventional group call, and the roaming user accesses the traditional call in an enhanced manner. Traditional calls are available for a large number of users and concentrated areas, and enhanced calls are available for a small number of users and a more dispersed area. In actual applications, the proportion of users roaming in the whole network in cluster calls is very small. In traditional calls, enhanced paging is performed for roaming users, which can fully utilize the characteristics of the system to meet the mobility of users and the requirements of the entire network call, and reduce The occupation of the resources of the roaming community. BRIEF abstract

1 is a network structure diagram of an embodiment of the present invention;

2 is a flow chart of establishing a roaming user cluster group call request according to an embodiment of the present invention. Preferred embodiment of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a network structure diagram of a CDMA digital trunking communication system according to an embodiment of the present invention, and each component is described as follows:

Master cluster system: In a cluster roaming call, it controls the connection of the entire call flow, maintains all the information of the entire call, and manages the allocation of the right to speak. Cluster system A and cluster system B are shown in FIG. In general, the single-call master cluster system is the caller's cluster system, and the group call master cluster system is the calling home cluster system. Each cluster system includes ··

MS: It has terminal services with cluster service functions. It also has various service capabilities such as telephone interconnection service, packet data service, and short message service, and can roam within the coverage of the whole network of the system.

BSS: a base station subsystem, including a base station controller (BSC), a base transceiver station (BTS), and a scheduling client (PDC) that interacts with the network side, completes the access function of the terminal, and distributes according to the type of service used by the user. Subsystem processing.

DSS: The scheduling subsystem completes the control and management functions of the terminal cluster services in its service area, and is the control center of the cluster services. The scheduling subsystem is interconnected via an IP network. The scheduling subsystem includes a scheduling server (PDS) and a scheduling register (PHR), where:

The dispatch server PDS implements call control and call rights management for trunk calls. In the home cluster system, it is called the home dispatch server, which is called the visitor dispatch server in the visited cluster system, and is called the master dispatch server in the master cluster system;

The scheduling register PHR stores registration information and location information of cluster users and groups, and implements authentication, authorization, and accounting functions for cluster users, as well as location update and group management functions. In the home cluster system, it is called the home scheduling register, which is called the visited place in the visited cluster system. The scheduling register is called the master scheduling register in the master cluster system.

The resource allocation mode of the shared wireless channel of the traditional call adopted by the present invention, how to use these channels to transmit voice and signaling during the call duration, the group information update of the terminal, the location registration of the roaming user, how to implement the enhanced cluster call Techniques such as roaming, and call rights management in trunking call roaming have been described in detail in existing invention patents, and the present invention is not further elaborated. The present invention focuses on an explanation of a method of controlling a roaming user in a paging call.

FIG. 1 is a flowchart of establishing a roaming user cluster group call request in an embodiment of the present invention, and the interaction process includes the following steps:

Step 201: The roaming user presses PTT (Push To Talk, Chinese refers to "push-to-talk" or "one-click"), and the mobile station initiates a cluster call request;

Step 202: Visiting the PDS, and sending an access authentication request by the visited PHR and the calling home PHR;

Step 203: The visited PDS receives the access authentication response through the calling home PHR and the visiting PHR, and obtains user information and group information, and determines that the user is a roaming user;

Step 204: The visited PDS forwards the cluster group call request to the calling home PDS, and the calling home PDS becomes the current call control point;

Step 205: The calling home PDS sends an access authentication request to the calling home PHR. Step 206: The calling home PHR sends an access authentication response to the calling home PDS. Through steps 205-206, the calling attribution is performed. The PDS re-initiates the authentication, and obtains group information and all user information from the calling home PHR;

Step 207: The home location PDS determines that the group is a traditional group, and the calling party is enhanced in an enhanced manner by the calling visited PDS and the wireless base station;

Step 208: The calling user sends an enhanced paging response to the home PDS through the visited base station controller and the visited PDS, and the calling user successfully accesses the call.

In the step 201, the resource allocation manner of different calls is transparent to the user, and the user does not need to know such a difference. Therefore, the operation of the user on the terminal has the same calling mode. In steps 207-208, the enhanced call is introduced in the traditional call. The paging mode is transparent to the user, and the user does not need to know which paging mode to access. What type of paging is only the cluster system A way to properly allocate cell resources.

For the home users, because the number of users is large and concentrated, the original traditional paging can be used to make the system characteristics and allocate the cell resources reasonably.

Therefore, in steps 207-208, steps 209-210 are further included: the home PDS simultaneously sends the traditional paging to the home base station controller, paging the home group members in the group; the home base station control The device sends a paging response message to the home PDS, and the home user automatically responds to the paging access call forwarded by the home base station controller.

In addition, if there are other group members roaming in the field besides the caller, you can also include the following steps (optional):

Step 211: If there are other members of the group member in addition to the calling party, the calling home PDS roams the called PDS and the roaming called visited base station controller to enhance the paging of the roaming. Call the user;

Step 212: The roaming called user sends an enhanced paging response to the calling home PDS through the visited base station controller and the visited PDS.

Through steps 211 ~ 212, the enhanced paging is used for the called users roaming in the field, and the cell resources can be properly configured.

After the above steps are completed, the implementation step 213: The roaming user cluster group call request is successfully established.

The foregoing embodiment is directed to two cases, namely: 1. The user who initiates the call in the group member is a roaming user (ie, the calling party roams); 2. The calling party roams, and there are other groups besides the calling party. Members roam in the field. Of course, in the actual application, the calling party may be a non-roaming user, and other group members roaming in the field. In this case, the process of implementing the group call in the present invention is as follows:

(1) The calling user initiates a cluster group call request at the home location, and the calling home scheduling subsystem authenticates the user and the call, and obtains the group information of the current cluster group call and the information of all users;

In summary, the present invention proposes a digital cluster implemented based on CDMA2000 technology. A control method for traditional group roaming, which is applicable to control of paging, channel assignment, and channel resource saving of roaming users in a conventional call. This method not only makes full use of it

The existing related specifications in the CDMA2000 technology, and by introducing an enhanced paging method in the conventional call, optimize the configuration of the cell resources on the basis of retaining the advantages of the existing conventional call, and satisfy the whole network call and the user's movement. Sexual needs are in line with the growing demand for cluster communications. Of course, the present invention may be embodied in various other various modifications and changes without departing from the spirit and scope of the invention. Changes and modifications are intended to be included within the scope of the appended claims.

Claims

Claim

A method for implementing roaming in a traditional group call of a code division multiple access digital cluster, comprising enhanced paging and a traditional call, wherein the main control cluster system is introduced in a traditional group call of a code division multiple access digital cluster The enhanced paging mode joins the cluster group call in a traditional manner to the non-roaming users belonging to the group at the home location, and adds the other group members roaming in the visited place to the traditional group call in an enhanced manner.

2. The method according to claim 1, wherein the group members roaming at the visited place comprise: a calling user and/or a called user.

3. The method of claim 2, wherein the method comprises the steps of:

4. The method of claim 2, wherein the method comprises the steps of:

(2) The calling home scheduling subsystem adds the non-roaming users whose origin belongs to the group to the current group group call in the traditional way, and will roam the other group members in the visited place to enhance Join the group call.

The method according to claim 3, wherein the step (c) further comprises: if there are other group members other than the calling party roaming in the field, the roaming called user is enhanced Join the group call.

The method according to claim 3, wherein in step (a), the scheduling server of the calling party scheduling subsystem receives the cluster group call request of the roaming user, and then accesses the visited place. The scheduling register and the calling home scheduling register authenticate the user, obtain user information and group information, and determine that the user is in the roaming state, and then forward the cluster group call request to the scheduling server of the calling home.

The method according to claim 6, wherein in step (b), the calling home scheduling server re-initiates authentication, and the group information and all user information are obtained from the calling home scheduling register.

The method according to claim 3 or 4, wherein the process of adding the non-roaming user belonging to the group to the group in the traditional manner is as follows: The home scheduling server sends the traditional paging to the home base station controller to page the home group members in the group; the home base station controller sends a paging response message to the home scheduling server, The roaming user automatically responds to the page forwarded by the home base station controller and successfully accesses the call.

The method according to any one of claims 1, 3, 4 or 5, wherein the implementation process of joining the group call in an enhanced manner is as follows: the calling home scheduling server dispatches the server by visiting The visited base station controller pages the roaming user in an enhanced manner, and the roaming user sends an enhanced paging response to the calling home scheduling server through the visited base station controller and the visited local dispatching server, so that the roaming user successfully accesses the call.