CN101106827B - An error tolerance method for offline calling user in digital cluster system - Google Patents

An error tolerance method for offline calling user in digital cluster system Download PDF

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Publication number
CN101106827B
CN101106827B CN2007101467849A CN200710146784A CN101106827B CN 101106827 B CN101106827 B CN 101106827B CN 2007101467849 A CN2007101467849 A CN 2007101467849A CN 200710146784 A CN200710146784 A CN 200710146784A CN 101106827 B CN101106827 B CN 101106827B
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user
pds
timer
speech
grid
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CN101106827A (en
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朱先正
唐鹏程
刘宓
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a fault tolerance system in a digital trucking communication system aimed at network-off user and is used in trucking communication field. The inventive technical proposal includes: a BSC (Base Station Controller) sends a detected user voice state to a PDS (PTT Dispatch Server) via a reverse voice frame detection module at the BSC side, or the BSC performs no process if a user voice state isn't detected; a user abnormal network-off detection module at the PDS side resets the user network-off detection timer if the user voice state from the BSC is received; otherwise, the used is determined to be abnormal network-off, and the PDS recovers communication right and release the user. The invention solves the problem that other users cannot perform communication when a user always occupies communication right during network-off state, thereby saving system resource and improving communication efficiency.

Description

In a kind of digital cluster system at the fault-tolerance approach of off-grid spoken user
Technical field
The present invention relates to the trunking communication field, relate in particular in a kind of digital cluster system fault-tolerance approach at the off-grid spoken user.
Background technology
Cluster (Trunking), promptly using a plurality of wireless channels is numerous user's services, working method with the telephone trunk line applies in the radio communications system exactly, limited dynamics of channels ground, distribute to all users of whole system automatically, promptly and best, so that utilize the frequency resource of the channel of whole system to the full extent.Its utilization switching technology and computer technology is for whole users of system provide very strong packet capability.We can say that trunked mobile communication system is a kind of special user's stored-program control exchange.
Trunking mobile communication is grow up the seventies in 20th century a kind of than the flexible movement communication system, and it is the senior developing stage that traditional dedicated radio scheduling is netted.
Traditional dedicated radio dispatching patcher, integrated planning is poor, and model, standard mix, and net more than little, and coverage rate is narrow, and in addition noise jamming is serious, the frequency resource waste.It is therefore, a kind of that new the radio dispatching technique---trunking mobile communication just arises at the historic moment.The circle of communication both at home and abroad generally believes that the 80-90 age in 20th century is that trunking mobile communication occupied proportion bigger 10 years in Personal Radio Communications, is a kind of Advanced Communications System of advancing side by side with cellular mobile communication.Countries such as American and Britain, method, moral, day, Northern Europe four countries, Canada and Australia are extensive exploitation and use this system all.Once once declined later on.In recent years, trunked mobile communication system is risen once more.
Trunking communication has been experienced simple intercom system (intercommunication form one to one) to single base station mini system (joining common-frequency simplex network construction form, alien frequencies list (two) worker network construction form, single channel get ready to go into action in hundreds form, band selective call form, multichannel dial automatically form), arrives the development course of big capacity multizone system (the multichannel user shares form) again; After experienced again from the simulation cluster to the leap of Digital Clustering, this leap makes trunking communication all can adopt more reliable digital processing mode at the aspects such as multi-access mode, speech coding, modulation-demodulation technique, simultaneous techniques, error-detection error-correction and diversity technique of signalling coding, employing.
In order to promote the sizable application of group system, further improve the frequency utilization rate simultaneously, trunked communication system a new application trend occurred on using, that unification that exactly a plurality of group systems combined is used and is managed, thereby be able to share channel and channel, share the overlay area, communication service, carry on a shoulder pole expense altogether, this way develops from the application towards indivedual professional users cluster application gradually towards the direction of using towards a plurality of group users, in other words, cluster application develops towards the direction of common network operation.This development will promote that undoubtedly cluster develops towards the direction of scale industrialization.Therefore trunking communication has been promoted to go up the research that realizes Clustering at existing public network (GSM, CDMA) by the development of private network to common network.
But, in the existing digital cluster system of realizing based on CDMA technology, applied for the user of right of speech for each on the business and distributed the duration of speaking, prevent that the long-time speech of user from not discharging right of speech; If the duration of speaking of system assignment is long, and the user's abnormal pull-off network of speaking, this time, if this user's off-grid is not known by system, before the duration timer of speaking does not arrive, just can't in time discharge this right of speech of off-grid user, directly cause other users both to can't hear sound and also can't apply for right of speech again, cause the waste of resource.
Summary of the invention
The invention provides in a kind of digital cluster system at the fault-tolerance approach of off-grid spoken user, when having solved the spoken user abnormal pull-off network, take right of speech all the time, directly cause other users the problem that in time to talk when unusual to occur at it.
Technical scheme of the present invention is as follows:
It is trunking dispatch server that the reverse speech frame detection module that steps A: BSC is a base station controller by the BSC side sends to PDS to detected user speech state; If do not detect the user speech state, then BSC does not process;
If user's abnormal pull-off network detection module of step B:PDS side receives the user speech state that BSC sends over, then carry out the replacement that user's off-grid detects timer; Otherwise, think that then this user's abnormal pull-off network, PDS reclaim conversation power and discharge this user.
Further, in the present invention, steps A may further comprise the steps:
Step 1, the user sends the right of speech request message to PDS;
Step 2, PDS judges whether this user has authority, if authority is arranged, PDS gives subscriber authorisation and sends the right of speech prompting to these all links that activate group; Otherwise, then user's speech privilege request failure, flow process finishes;
Step 3, the user sends authorization response message to PDS;
Step 4, the user begins conversation, and BSC sends to PDS with detected user speech state; If BSC does not detect user speech, then BSC can not send user speech to PDS.
Further, in the present invention, step B may further comprise the steps:
Step C, PDS receive after the authorization response message that the talking state machine among the PDS forwards Speaking to and promptly says speech phase, and the off-grid that starts simultaneously among the PDS detects timer;
Step D, if received the user speech status message that BSC sends before off-grid detects timer expiry, then PDS this off-grid of resetting detects timer; Otherwise, think that then this user's abnormal pull-off network, PDS reclaim conversation power and discharge this user.
Further, said method also has following characteristics: in the step 2, PDS points out to subscriber authorisation and to all links transmission rights of speech of this activation group and is meant: PDS distributes to this user link and notifies other user after giving subscriber authorisation, and this link is occupied.
Further, said method also has following characteristics: in the step 3, PDS receives after the authorization response message that the talking state machine among the PDS forwards the Speaking state to, and at this moment, state of user is the Speaking state.
Further, said method also has following characteristics: in the step 3, when off-grid detected the timer startup, PDS can be provided with off-grid as required and detect length of timer.
Further, said method also has following characteristics: in the step 3, off-grid detects timer and comprises four kinds of states:
Timer starts: after PDS received right of speech authorization response message, talking state machine speaking timer started, and meanwhile, off-grid detects timer and starts;
The timer deletion: after user's speech privilege discharges, the deletion of talking state machine speaking timer, simultaneously, off-grid detects the timer deletion;
Timer resets: PDS had received the user speech status message that BSC reports before off-grid detects timer expiry, then off-grid is detected timer and reset;
Timer expiry: PDS did not receive that the user's voice state reported signaling before user's abnormal pull-off network detects timer expiry, then off-grid detects timer expiry.
Further, said method also has following characteristics: in the step 4, if the user had just normally discharged right of speech before speaking timer or off-grid detection timer expiry, then PDS detects the timer deletion with talking state machine speaking timer and off-grid, discharges right of speech.
Further, said method also has following characteristics: in the step 4, PDS thinks that the user takes place unusually, discharge right of speech after, PDS can notify other user's speech privilege free time, simultaneously, PDS can detect off-grid the timer deletion.
When the invention solves the spoken user abnormal pull-off network, take right of speech all the time, directly cause other users the problem that in time to talk when unusual to occur, saved system resource, improved transmission efficiency at it.
Description of drawings
Fig. 1 is the fault-tolerant network structure of support off-grid spoken user that the present invention uses;
Fig. 2 is a timer state change map among the present invention;
Fig. 3 is the fault-tolerant flow chart of off-grid spoken user among the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the fault-tolerant network structure of support off-grid spoken user that the present invention uses, and each part is described as follows:
(1) MS: colony terminal, can support storing subscriber information, group information, dispatcher-controlled territory are judged, the terminal equipment of group services such as response traditional group call paging.
(2) BSS: base station sub-system, comprise the transceiver (BTS) of supporting trunked call, base station controller (BSC) and with the mutual dispatching client (PDC) of network side.
(3) PDS: trunking dispatch server, realize the calling control and the right of speech management of trunked call;
Fig. 2 is a timer state change map among the present invention, and the step that comprises is as follows:
Step 201, after PDS received user's speech privilege authorization response message, the talking state machine speaking timer among the PDS started, and meanwhile, the off-grid among the PDS detects timer and starts; This function of switch open that opening timing detects in the network management system of PDS is provided with off-grid simultaneously as required and detects length of timer;
Step 202, before timer was not overtime, possible user had normally discharged right of speech such timer state and has directly forwarded timer deletion in the step 205 to, if in this section abnormal right of speech that discharges in the time, then forward next stage step 203 to and judge;
Step 203, PDS had just received the user speech status message that BSC sends, the timer of then resetting before timer is not overtime; Otherwise waiting timer is overtime, changes step 204 over to and handles accordingly;
Step 204, if PDS did not receive the user's voice state information before user's abnormal pull-off network detects timer expiry, judge that then off-grid detects timer expiry after, PDS just discharges abnormal pull-off network user's right of speech, guarantees that other users can in time apply for right of speech;
Step 205, user's speech privilege discharges back (PDS initiatively discharges right of speech after comprising normal release right of speech and abnormal pull-off network), the deletion of talking state machine speaking timer, off-grid detects the timer deletion simultaneously;
Step 206, this flow process of timer deletion back finishes.
Fig. 3 is the fault-tolerant flow chart of off-grid spoken user among the present invention, and the step that comprises is as follows:
Step 301, the user applies for right of speech to PDS;
Step 302, after PDS received the right to apply for words, PDS judged whether this user has authority, if authority is arranged, then sends Grant, authorizes this user's speech privilege; Otherwise, user's speech privilege application failure, flow process finishes;
Step 303, the user sends authorization response GrantAck message to PDS, and after PDS received that this replys, User Status became the Speaking state, starts off-grid simultaneously and detects timer;
Step 304, before off-grid detected timer expiry, BSC sent to PDS with detected user speech state information PTTUserStatusReport, and PDS receives after this message that the replacement off-grid detects timer;
Step 305, behind the replacement timer, PDS continues to wait for the voice status reporting message of BSC, if received reporting message before timer expiry, then equally the replacement off-grid is detected timer;
Step 306, the user has been taken place unusual and off-grid, and BSC just can't detect this user's voice, BSC detects less than user's voice, just can not send user's voice state reporting message to PDS, PDS does not receive the voice status reporting message that BSC sends, and waits for that off-grid detects timer expiry;
After step 307, off-grid detected timer expiry, PDS thought and then issues the spoken user abnormal pull-off network AlertWithInfo and notify other user's speech privilege free time;
Step 308, other users just can normally apply for right of speech after receiving this notification message, have guaranteed that other users can in time apply for right of speech behind the spoken user abnormal pull-off network.
In sum, the present invention mainly discusses in a kind of digital cluster system the implementation method at the fault tolerant mechanism of off-grid spoken user.In view of the semiduplex characteristics of trunking communication itself, one of them user is in the process of speech, and other users can't talk, if the spoken user abnormal pull-off network, and take right of speech all the time, directly cause other users when appearance is unusual, can not in time talk.Purpose of the present invention is exactly in order to prevent the generation of this situation.In today that group service becomes increasingly abundant, the present invention has guaranteed professional real-time and accuracy.

Claims (8)

  1. In the digital cluster system at the fault-tolerance approach of off-grid spoken user, it is characterized in that, may further comprise the steps:
    It is trunking dispatch server that the reverse speech frame detection module that steps A: BSC is a base station controller by the BSC side sends to PDS to detected user speech state; If do not detect the user speech state, then BSC does not process;
    If user's abnormal pull-off network detection module of step B:PDS side receives the user speech state that BSC sends over, then carry out the replacement that user's off-grid detects timer; Otherwise, think that then this user's abnormal pull-off network, PDS reclaim conversation power and discharge this user; Wherein, described step B specifically may further comprise the steps:
    PDS receives after the authorization response message that the talking state machine among the PDS forwards Speaking to and promptly says speech phase, and the off-grid that starts simultaneously among the PDS detects timer;
    If received the user speech status message that BSC sends before off-grid detects timer expiry, then PDS this off-grid of resetting detects timer; Otherwise, think that then this user's abnormal pull-off network, PDS reclaim conversation power and discharge this user.
  2. 2. method according to claim 1 is characterized in that steps A may further comprise the steps:
    Step 1, the user sends the right of speech request message to PDS;
    Step 2, PDS judges whether this user has authority, if authority is arranged, PDS gives subscriber authorisation and sends the right of speech prompting to these all links that activate group; Otherwise, then user's speech privilege request failure, flow process finishes;
    Step 3, the user sends authorization response message to PDS;
    Step 4, the user begins conversation, and BSC sends to PDS with detected user speech state; If BSC does not detect user speech, then BSC can not send user speech to PDS.
  3. 3. method according to claim 2, it is characterized in that in the step 2, PDS points out to subscriber authorisation and to all links transmission rights of speech of this activation group and is meant: after PDS gives subscriber authorisation, distribute to this user link and notify other user, this link is occupied.
  4. 4. method according to claim 2 is characterized in that, in the step 3, PDS receives after the authorization response message that the talking state machine among the PDS forwards the Speaking state to, and at this moment, state of user is the Speaking state.
  5. 5. method according to claim 2 is characterized in that, in the step 3, when off-grid detected the timer startup, PDS can be provided with off-grid as required and detect length of timer.
  6. 6. method according to claim 2 is characterized in that, in the step 3, off-grid detects timer and comprises four kinds of states:
    Timer starts: after PDS received right of speech authorization response message, talking state machine speaking timer started, and meanwhile, off-grid detects timer and starts;
    The timer deletion: after user's speech privilege discharges, the deletion of talking state machine speaking timer, simultaneously, off-grid detects the timer deletion;
    Timer resets: PDS had received the user speech status message that BSC reports before off-grid detects timer expiry, then off-grid is detected timer and reset;
    Timer expiry: PDS did not receive that the user's voice state reported signaling before user's abnormal pull-off network detects timer expiry, then off-grid detects timer expiry.
  7. 7. method according to claim 3, it is characterized in that, in the step 4, if the user had just normally discharged right of speech before speaking timer or off-grid detection timer expiry, then PDS detects the timer deletion with talking state machine speaking timer and off-grid, discharges right of speech.
  8. 8. method according to claim 2 is characterized in that, in the step 4, PDS thinks that the user takes place unusually, discharge right of speech after, PDS can notify other user's speech privilege free time, simultaneously, PDS can detect off-grid the timer deletion.
CN2007101467849A 2007-08-18 2007-08-18 An error tolerance method for offline calling user in digital cluster system Expired - Fee Related CN101106827B (en)

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CN102143615A (en) * 2010-08-20 2011-08-03 华为技术有限公司 Short message sending and treating method, related device and system
CN102137418A (en) * 2011-03-09 2011-07-27 中兴通讯股份有限公司 Method and system for controlling speak right authorization, and base station
EP3057377B1 (en) * 2013-11-07 2021-12-29 Huawei Technologies Co., Ltd. Network device, terminal device and voice service control method
CN105704746A (en) * 2014-11-25 2016-06-22 中兴通讯股份有限公司 Broadband cluster system fault processing method and device
CN105992165A (en) * 2015-02-11 2016-10-05 普天信息技术有限公司 Realization method of conversation time limit function in group calling
CN106470402A (en) * 2015-08-21 2017-03-01 中兴通讯股份有限公司 A kind of anti-right of speech hangs method and its device
CN109104265B (en) * 2018-06-07 2021-12-24 海能达通信股份有限公司 Channel configuration method, base station and readable storage medium
CN112449443A (en) * 2019-09-02 2021-03-05 成都鼎桥通信技术有限公司 PTT authorization release method and device of PDT system
CN110809245B (en) * 2019-11-08 2022-06-03 武汉信科移动通信技术有限公司 Method and device for monitoring state of speaking right party in cluster group calling

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