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WO2009026762A1 - Procédé et appareil de mise à jour d'informations de groupe dans un système de grappe de serveurs numérique - Google Patents

Procédé et appareil de mise à jour d'informations de groupe dans un système de grappe de serveurs numérique Download PDF

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Publication number
WO2009026762A1
WO2009026762A1 PCT/CN2007/003834 CN2007003834W WO2009026762A1 WO 2009026762 A1 WO2009026762 A1 WO 2009026762A1 CN 2007003834 W CN2007003834 W CN 2007003834W WO 2009026762 A1 WO2009026762 A1 WO 2009026762A1
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WO
WIPO (PCT)
Prior art keywords
group information
user
information update
module
pds
Prior art date
Application number
PCT/CN2007/003834
Other languages
English (en)
Chinese (zh)
Inventor
Yue Li
Cao Ding
Changbao Zhu
Original Assignee
Zte Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Publication of WO2009026762A1 publication Critical patent/WO2009026762A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Definitions

  • the field of the digital trunking system of the present invention relates to a group information updating method and apparatus in a digital trunking system.
  • the digital trunking system is a new type of mobile communication system that emerged at the end of the twentieth century. In addition to the personal mobile communication services that the public mobile communication network can provide, it can also realize communication between individuals and groups.
  • the digital trunking system is mainly used for internal communication and command and control of government departments, public security, transportation, and other departments.
  • Figure 1 is a schematic diagram showing the basic structure of the core network part of the digital trunking system.
  • the digital trunking system core network 500 includes: a PTT (Push-To-Talk) terminal MS 501, a PTT cluster scheduling client PDC (PTT Dispatch Client) 502, and a PTT scheduling server PDS (PTT). Dispatch Server) 503, PTT Home Register PHR (PTT Home Register) 504.
  • PTT Push-To-Talk
  • PDC PTT cluster scheduling client
  • PDS PTT scheduling server
  • Cluster PTT uses half-duplex communication. Only one person can have and use the right to talk at the same time in the group. Others listen passively.
  • the PDS is the total control point of the trunk call, and completes the processing of the cluster dispatch call, including identifying the cluster user, establishing various trunk calls, such as private call and group call, and cluster PTT call right management.
  • the PDS acts as a scheduling server and is also responsible for packet distribution. It receives cluster voice data sent by the reverse link (that is, PDC to PDS) and redistributes it to the corresponding forward link (that is, PDS to PDC) according to the nature of the call.
  • the PDC aggregates the reverse cluster voice traffic and distributes the forward cluster voice streams.
  • the PDC also establishes a dedicated signaling link to the PDS to communicate signaling related to the trunked call between the Base Station Controller (BSC) and the PDS.
  • BSC Base Station Controller
  • the PHR is used to complete the user's cluster service authentication, authorization, billing, location update, and dynamic group management functions, and provides group and user service acceptance for cluster users.
  • the GID (Group ID) paging function is supported, and the terminal needs to store group information.
  • the system side needs to synchronize the information to the terminal, that is, trigger the group information update process.
  • the group information update needs to first page the user, and then send the group information to be updated, so that the terminal can update the group information in time, so that the PTT terminal MS can respond to the PTT call according to the stored group information.
  • FIG. 2 is a flow chart of triggering group information update after the PTT terminal MS performs location registration in the digital trunking system in the prior art. As shown in Figure 2, the process includes the following steps:
  • step S101 After the PTT terminal MS is powered on, perform boot location registration on the system side (ie, PDS, PHR side); trigger PHR (not shown) to detect whether the PTT terminal MS needs to update group information in the database, if needed Update, notify the PDS, the PDS adds a user entry in the group information update table, and performs step S102; otherwise, the process ends;
  • system side ie, PDS, PHR side
  • PHR not shown
  • the PDS sends a paging request message to the PDC, where the PDC is responsible for paging the PTT terminal MS to the call;
  • S103 The allocation of the air interface resource is completed between the PDC and the PTT terminal. After the service channel is established, the PDC returns an assignment request response message to the PDS, indicating that the service channel is successfully established.
  • the PTT terminal MS responds to the PDC paging request message; after receiving the paging response message sent by the PTT terminal MS, the PDC sends a PTT paging success response message (or: PTT call setup indication message) to the PDS;
  • S105 the PDS sends a group information update request message to the PDC, and the PDC sends the group information update request message to the PTT terminal MS;
  • the PTT terminal MS performs the group information update in real time, and feeds back the update result to the PDC after completing the group information update, and the PDC sends the PTT group information update response to the PDS after receiving the group information update result fed back by the PTT terminal MS.
  • S107 After receiving the group information update response message fed back by the PDC, the PDS ends the current group information update, and sends a PTT call release command to the PDC, instructing the PDC to release the air traffic channel resource of the corresponding PTT terminal MS.
  • FIG. 3 is a flow chart of group information update performed by a PTT terminal MS in a busy state in the prior art. As shown in Figure 3, in a digital trunking system, the specific process of updating a group information after a PTT terminal MS is in a call and its group is changed is as follows:
  • the PTT terminal MS is in the PTT call state, and the traffic channel between the PDC and the PTT terminal MS is already occupied;
  • the PDS sets a cyclic scan timer for the group information update table, and periodically obtains the user full information including the state information of the user; and determines whether the PTT terminal MS is busy according to the user full information, if the PTT terminal MS is still in the PTT In the call state, the next scan is entered, otherwise, step S203 is performed;
  • the PDS sends a paging request message to the PDC, where the PDC is responsible for paging the PTT terminal MS to the call;
  • the PTT terminal MS responds to the PDC paging request message; after receiving the paging response message sent by the PTT terminal MS, the PDC sends a PTT paging success response message (or: PTT call setup indication message) to the PDS;
  • the PDS sends a PTT group information update request message to the PDC, and the PDC sends the group information update request message to the PTT terminal MS.
  • the PTT terminal MS performs the group information update in real time, and feeds back the update result to the PDC after completing the group information update, and the PDC sends the PTT group information update response to the PDS after receiving the group information update result fed back by the PTT terminal MS.
  • the PDS After receiving the group information update response message fed back by the PDC, the PDS ends the current group information update, and sends a PTT call release command to the PDC, instructing the PDC to release the air traffic channel resource of the corresponding PTT terminal MS.
  • the user is added to the group, and the group information of the PTT terminal MS changes to trigger the group information update and occupy the traffic channel.
  • the burst of large-scale group information update messages will have a very large impact on the wireless communication resources, and may also cause message congestion.
  • traffic control (referred to as flow control) is performed on the PDC, and the PDC controls the establishment of the traffic channel according to the occupation status of the resources. If the PDC finds that the number of traffic channels occupied by the current group information update exceeds the threshold of the flow control, the allocation of the group information update traffic channel is rejected.
  • the fatal disadvantages of the above methods are: If the PDC refuses to establish a traffic channel for this group information update, the group information update process cannot be performed, and when the PDC can initiate a new group information update is unknown to the PDS. If the PDS-flavor starts the group information update process according to the setting value of the cycle timer, the interaction between the PDS and the PDC is increased, so that the process of performing the group information update is more complicated, consuming more communication resources and Processing resources also increases the likelihood of message collisions.
  • the interaction between the PDS and the PDC avoids group information update methods and devices in a digital cluster system that consumes communication resources and processes resources excessively.
  • the present invention provides a group information update method in a digital trunking system, characterized in that before the group information update is performed on the user, the PDS determines the number of group information updates currently being performed, and waits until the current progress is being made. When the number of group information updates is less than the set threshold and the user status is idle, the PDS initiates the group information update of the user.
  • the method includes the following steps: A: The PDS determines the number of group information updates currently being performed. If the number is less than the set threshold, the next step is performed; otherwise, the timer is started, and the step is executed after the timer expires;
  • the PDS sends a paging request message to the PDC
  • the PDS and the PDC send a PTT group information update request message to the user after establishing a traffic channel with the user;
  • the PDS After receiving the PTT group information update response message, the PDS completes the group information update of the user, and releases the service channel.
  • the method includes the following steps:
  • PDS determines the number of group information updates currently being performed and the status of the user. If the number is less than the set threshold and the user status is idle, the next step is performed; otherwise, the timer is started, waiting for timing Perform this step after the timer expires;
  • the PDS sends a paging request message to the PDC
  • the PDS and the PDC send a PTT group information update request message to the user after establishing a traffic channel with the user;
  • the PDS After receiving the PTT group information update response message, the PDS completes the group information update of the user, and releases the service channel.
  • the identifier of the user correspondence entry in the group information update table is set; after the group information update of the user is completed, the group information is updated in the table.
  • the identifier of the user corresponding entry is de-asserted; the PDS obtains the number of the currently-on-group information update by counting the number of the set identifiers in the current group information update table; or the PDS sends the page
  • the counter value is incremented by one; after the user's group information update is completed, the counter value is decremented by one; the PDS obtains the number of the currently ongoing group information update by the counter value.
  • the entry is added to the user in the group information update table; after the group information update of the user is completed, the entry is deleted from the group information update table; The number of currently updated group information updates is obtained by counting the number of entries in the current group information update table.
  • the present invention also provides a group information updating apparatus in a digital trunking system, the apparatus is disposed in a PDS of the digital trunking system, and the apparatus comprises: a startup module, the startup module includes a determination module, Call module; where:
  • the determining module is configured to determine whether the number of group group information updates currently being performed is less than a set threshold value and whether the user status is idle, and output a determination result before performing group information update on the user;
  • the determining result output by the paging module in the determining module is: when the number of group information updates currently being performed is less than a set threshold, and the user status is idle, the group information of the user is initiated. Update.
  • the startup module further includes a loop module; the loop module is configured to output a judgment result in the judging module, that: the number of group information updates currently being performed is greater than or equal to a set threshold value, or the user
  • the judgment module is triggered to perform the determination and output a judgment result.
  • the device further includes: a setting module, a setting module, and a deleting module; wherein: the setting module is configured to add a flag in the group information update table;
  • the setting module is configured to: when the paging module initiates update of the group information of the user, set an identifier bit of the user correspondence entry in the group information update table;
  • the deleting module is configured to: when the group information update of the user is completed, cancel the identifier of the user correspondence entry in the group information update table;
  • the determining module obtains the number of the currently ongoing group information update by counting the number of the flag bits set in the current group information update table.
  • the device further includes: a setting module, a deleting module; the setting module further includes a parameter setting module; wherein:
  • the parameter setting module is configured to add a counter value by 1 when the paging module initiates updating the group information of the user;
  • the deleting module is configured to decrement the counter value by 1 when the group information update of the user is completed; and the determining module obtains the number of the group information update currently being performed according to the counter value.
  • the device further includes: a setting module, a deleting module; the setting module includes a parameter setting module, and the deleting module includes a table item deleting module; wherein:
  • the parameter setting module is configured to add an entry for the user in the group information update table before the paging module initiates updating the group information of the user;
  • the entry deletion module is configured to delete the entry corresponding to the user from the group information update table when the group information update of the user is completed;
  • the judging module obtains the number of the current group information update being performed by counting the number of entries in the current group information update table.
  • the technical solution provided by the invention has greater service flexibility, and can limit the traffic channel resources occupied by concurrent group information update; and can also set different threshold values according to specific network conditions to satisfy the network. Different requirements can not only meet the needs of different users, but also effectively prevent message congestion in the digital trunking system caused by group information update.
  • Figure 1 is a schematic diagram showing the basic structure of a core network part of a digital trunking system
  • 2 is a flow chart of triggering group information update after a PTT terminal MS performs location registration in a digital trunking system in the prior art
  • 3 is a flowchart of a group information update performed by a PTT terminal MS in a busy state in the prior art
  • FIG. 4 is a flowchart of triggering group information update after the PTT terminal MS performs location registration according to an embodiment of the present invention
  • FIG. 5 is a flow chart of group information update performed by a PTT terminal MS in a busy state according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a group information updating apparatus in a digital trunking system according to an embodiment of the present invention. Preferred embodiment of the invention
  • the basic idea of the present invention is to count the users/terminals that are updating the group information in the PDS, and update the group information to the new user/terminal when the count does not exceed the set threshold.
  • the present invention adds a parameter to the data area group information update table of the PDS, and the parameter is a flag bit. .
  • This flag is used to mark whether the user is performing group information update. That is, a Tag field is added to the entry of the group information update table of the PDS to store the identifier bit.
  • the PDS After the PDS initiates paging to a user, the PDS immediately responds to the user corresponding table in the group information update table. Setting the flag bit in the item (for example, setting the flag bit to 1) indicates that the user is performing group information update.
  • the PDS Before the PDS initiates paging for the user, the PDS first counts the number of entries in the data area group information update table that have been set, that is, the total number of users who are currently updating the group information, thereby It compares with the configured group information update flow control threshold to determine whether to initiate the current paging to control the number of currently updated users to avoid message congestion.
  • FIG. 4 is a flowchart of triggering group information update after the PTT terminal MS performs location registration according to an embodiment of the present invention. As shown in Figure 4, the process includes the following steps:
  • PTT terminal MS After the PTT terminal MS (user) is powered on, it enters the system side (ie, PDS, PHR side). The booting location registration is triggered; the triggering PHR (not shown) detects in the database whether the PTT terminal MS needs to update the group information, and if it needs to be updated, notifies the PDS, and the PDS adds the PTT terminal to the group information update table. MS entry;
  • the PDS obtains the total number of the flag bits that are set in each entry of the current group information update table, and determines, according to the total number of the identifier bits, whether the number of users currently performing group information update is smaller than the group information update flow control. Threshold, if yes, step S303 is performed, otherwise the loop timer is started, and after waiting for the loop timer to expire, the next full table scan for the group information update table is performed;
  • the PDS sends a paging request message to the PDC, where the PDC is responsible for paging the PTT terminal MS to the call;
  • the PDS identifies an identifier in the corresponding entry of the group information update table, and identifies that the PTT terminal MS is performing group information update.
  • a count value may be set for counting the number of set identifier bits in the group information update table, so as to compare the number of subsequent set identifier bits with the group information update flow control threshold value; When the PDS sets the flag, the count value is incremented by one.
  • the PDC After the PDC and the PTT terminal MS complete the allocation of the air interface resources, after the service channel is established, the PDC returns an assignment request response message to the PDS, indicating that the service channel is successfully established;
  • the PTT terminal MS responds to the PDC paging request message; after receiving the paging response message sent by the PTT terminal MS, the PDC sends a PTT paging success response message (or: PTT call setup indication message) to the PDS;
  • the PDS sends a group information update message to the PDC, and the PDC sends the update information of the group information to the PTT terminal MS;
  • the PTT terminal MS performs the group information update in an instant, and feeds the update result to the PDC after completing the group information update, and the PDC sends the PTT group information update response to the PDS after receiving the group information update result fed back by the PTT terminal MS.
  • the PDS sends a PTT call release command to the PDC, instructing the PDC to release the air traffic channel resource of the corresponding ⁇ terminal MS.
  • FIG. 5 is a flow chart of group information update performed by a PTT terminal MS in a busy state according to an embodiment of the present invention. As shown in FIG. 5, in the digital trunking system, the specific process of updating the group information after the PTT terminal MS is in a call and its group is changed is as follows:
  • the PTT terminal MS (user) is in the PTT call state (busy state), and the traffic channel between the PDC and the PTT terminal MS is already occupied;
  • the PDS adds the corresponding entry of the user (PTT terminal MS) in the group information update table, starts a cyclic scan timer to determine the current state of the user, and if it is determined that the user state is idle, performing step S403 on the user. If the user status is busy, determining the next user status or waiting for the timer to expire and re-determining the status of the user;
  • step S403 The PDS obtains the total number of the flag bits that are set in each entry of the current group information update table, and determines whether the number of the set flag bits is smaller than the set group information update flow control threshold. If yes, step S404 is performed; otherwise, the loop timer is started, and after waiting for the loop timer to expire, the next full table scan of the group information update table is performed;
  • the PDS sends a paging request message to the PDC, where the PDC is responsible for paging the PTT terminal MS to the call;
  • S405 The PDS sets the flag position of the corresponding entry in the group information update table to identify that the PTT terminal MS is performing group information update.
  • a count value may be set for counting the number of set identifier bits in the group information update table, so as to compare the number of subsequent set identifier bits with the group information update flow control threshold value; When the PDS sets the flag, the count value is incremented by one.
  • S406 The PDS requires the PDC and the PTT terminal MS to allocate the air traffic channel resources, and the PDC and the PTT terminal MS complete the allocation of the air interface resources. After the service channel is established, the PDC returns an assignment request response to the PDS, indicating that the service channel is successfully established.
  • S407 The PTT terminal MS responds to the paging request message of the PDC, and after receiving the paging response message sent by the PTT terminal MS, the PDC sends a PTT paging success response message (or: PTT call setup indication message) to the PDS.
  • the PDS sends a PTT group information update request message to the PDC, and the PDC sends the group information update request message to the PTT terminal MS.
  • the PTT terminal MS performs group information update in an instant, and feeds the update result to the PDC after completing the group information update, and the PDC sends the PTT group information update response to the PDS after receiving the group information update result fed back by the PTT terminal MS.
  • S410 The PDS clears the corresponding item of the current group information update in the group information update table, or cancels the setting of the identifier bit;
  • the PDS decrements the above count by one.
  • the PDS ends the update of the group information, and sends a PTT call release command to the PDC, instructing the PDC to release the air traffic channel resource of the corresponding PTT terminal MS.
  • the invention uses the identifier bit to monitor the number of users who are updating the group information. If the threshold is exceeded, the user is no longer paged, waiting for the started update. End. This ensures that the number of update processes performed at the same time remains within a stable and controllable range.
  • the PDS may obtain the number of users currently performing group information update by counting the number of entries in the group information update table; that is, when initiating group information update (initiating a corresponding paging request to the PDC), Or before, the PDS adds an entry for the user in the group information update table; when the group information update is completed (the PDS receives the PTT group information update response message), or after, the PDS deletes the corresponding information from the group information update table.
  • the entry is a schematic structural diagram of a group information updating apparatus in a digital trunking system according to an embodiment of the present invention. As shown in FIG. 6, the group information updating apparatus 600 is disposed in the PDS 503, and includes: a setting module 601, a starting module 602, a setting module 603, and a deleting module 604.
  • the setting module 601 is configured to add a parameter to the group information update table of the PDS, where the parameter is a flag. This flag is used to mark whether the user is performing group information update. That is, a Tag field is added to the entry of the group information update table of the PDS to store the identifier bit.
  • the setting module 603 is configured to initiate a paging to the user in the PDS, and after the group information update is started, set the identifier bit in the corresponding entry of the user in the group information update table, indicating that the user has started the group. Group information is updated.
  • the startup module 602 is configured to update the number of the identifiers that have been set in each entry of the table according to the group information, and count the total number of users currently updating the group information, and thus configure The group information update flow control thresholds are compared to determine whether to initiate a current page to control the number of currently updated users to avoid message congestion.
  • the startup module 602 further includes: a determining module 6021, a paging module 6022, and a looping module 6023.
  • the determining module 6021 is configured to determine whether the number of the flag bits that are set in the group information update table is smaller than the set group information, update the flow control threshold, and the status of the PTT terminal MS. Whether it is idle, and output the judgment result;
  • the paging module 6022 is configured to: when the determination result output by the determining module 6021 is YES, initiate paging to the PTT terminal MS;
  • the loop module 6023 is configured to: when the judgment result output by the judging module 6021 is negative, start the loop timer, and wait for the loop timer to expire before re-triggering the judging module 6021.
  • the deleting module 604 is configured to cancel the setting of the identifier bit after the group information update is completed;
  • the deletion module 604 further includes an entry deletion module 6041, configured to delete an entry corresponding to the PTT terminal MS in the group information update table after the group information update is completed.
  • the setting module 603 further includes a parameter setting module 6031, configured to add a corresponding table to the PTT terminal MS in the group information update table before starting the group information update of the PTT terminal MS.
  • the item is also used to increase the counter value by 1 when the group information update of the PTT terminal MS is started, or afterwards; the startup module 602 (the judgment module 6021) can also count the total number of users currently performing group information update according to the counter value.
  • the deletion module 604 may decrement the counter value by one after the group information update is completed.
  • the technical solution provided by the present invention has greater service flexibility, and can limit the traffic channel resources occupied by concurrent group information update; and can set different threshold values according to specific network conditions to satisfy the network.
  • the different needs can not only meet the needs of different users, but also effectively prevent message congestion in the digital trunking system caused by group information update.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention a pour objet un procédé et un appareil de mise à jour d'informations de groupe dans un système de grappe de serveurs numérique. Le procédé comprend les étapes suivantes : un PDS (Push-to-talk Dispatch Server) détermine la quantité d'utilisateurs qui mettent à jour actuellement les informations de groupe avant de réaliser une mise à jour des informations de groupe d'un utilisateur. Lorsque la quantité d'utilisateurs qui réalisent une mise à jour des informations de groupe est inférieure à une valeur seuil définie et que le statut de l'utilisateur est libre, le PDS déclenche la mise à jour des informations de groupe de l'utilisateur.
PCT/CN2007/003834 2007-08-30 2007-12-27 Procédé et appareil de mise à jour d'informations de groupe dans un système de grappe de serveurs numérique WO2009026762A1 (fr)

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CN2007101211512A CN101115242B (zh) 2007-08-30 2007-08-30 一种防止数字集群系统中群组更新消息拥塞的方法及装置

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CN1599326A (zh) * 2003-09-16 2005-03-23 华为技术有限公司 一种集群业务中动态更新群组信息的方法
CN1937833A (zh) * 2005-09-22 2007-03-28 中兴通讯股份有限公司 集群系统中实现漫游终端群组信息更新的方法

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