CN1859771A - Multicast broadcast channel distributing method in voice multicast broadcast service - Google Patents
Multicast broadcast channel distributing method in voice multicast broadcast service Download PDFInfo
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- CN1859771A CN1859771A CN 200610025772 CN200610025772A CN1859771A CN 1859771 A CN1859771 A CN 1859771A CN 200610025772 CN200610025772 CN 200610025772 CN 200610025772 A CN200610025772 A CN 200610025772A CN 1859771 A CN1859771 A CN 1859771A
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Abstract
The present invention discloses multicasting broadcast channel distribution method in phonetic multicasting broadcasting service, to make MS capable of as much as possible adding multicasting when BSS establishing cell multicasting broadcast channel failing. It contains when BSS in VGCS/VBS service establishing cell multicasting broadcast channel failing, then it transmits channel allocation failing message to MS needed adding said service in said cell, wherein carrying said MS usable neighbor cell multicasting broadcast channel information, said MS according to neighbor cell multicasting broadcast channel information, adding specified neighbor cell multicasting broadcast channel.
Description
Technical field
The present invention relates to moving communicating field, particularly voice multicast broadcast service (Voice GroupCall Service and Voice Broadcast Service is called for short " VGCS/VBS ").
Background technology
As everyone knows, railway is a main artery of national economy, and railway communication is the sustainer that railway transportation is produced.Set up a safety, the railway system reliable, sustainable development is concerning national economy.Obtain railway Global Link mobile communcations system (the GSM for Railway of extensive experimentation in Europe, be called for short " GSM-R ") as a kind of advanced person's technical system, for railway special communication provides powerful, professional abundant, a reliable and stable integrated information platform, schedule has also been put in development in China, and its utilization prospect can not be despised.
GSM-R increases cluster communication function and the mobile communication system of a railway special use constituting on global system for mobile communications (Global System for mobileCommunication, be called for short " GSM ").The clustering functionality that is increased comprises advanced speech call (AdvancedSpeech Call Item is called for short " ASCI ") function, by GSM Phase2+ (GSM stage 2+) standard definition.
The ASCI function has comprised the basic service of three kinds of specialized mobile radios: the multipriority of enhancing and conversion power (Enhanced Multi-Level Precedence and Pre-emption, abbreviation " eMLPP "), VGCS and Voice Broadcast Service (Voice Broadcast Service is called for short " VBS ").
Wherein, VGCS is that wherein some people can be talked, the voice communication mode of the point-to-multipoint of listening in many ways by participation in many ways.It has broken through the limitation of point-to-point communication, can set up calling fast.
The member who comprises two kinds of identity in this business, dispatcher and service-user: the dispatcher can be fixed network user or mobile subscriber, can only have five at most, can not have yet, by network the voice communication of the designated lane participation multicast of its foundation; Service-user is the mobile subscriber of signatory VGCS business, and quantity is not limit, and the called service user participates in the voice communication of multicast by the multicast channel in the multicast area.
During call setup, the two-way channel of standard being provided for calling business user and dispatcher distributes the down link of same Traffic Channel to answer for all called service users.The VGCS service call only allows 1 service-user to reach at the most at any time, and 5 dispatchers talk simultaneously.
Service-user will be realized transformation between speaker and the hearer's identity by seizing up link in whole calling procedure.The service-user that is in listen state can be by robbing up operation, promptly by obtaining speaking right and participate in speech by PTT (Push To Talk is called for short " PTT ") button.Robbing up operation and carry out according to the mode of " First come first served ", also is who gets earlier and speak whom, and other service-users have only just can continue to rob up operation when up free time.And the dispatcher so need not rob up operation, can participate in speech owing to have the designated lane of oneself at any time.
A specific VGCS service communication is unique definite by group identifier (Group ID is called for short " group ID ") and multicast area, and group ID and multicast area are called the multicast reference altogether.
Wherein, group ID identifies the function of this group, and promptly the member by which identity participates in; A service-user a plurality of groups of ID that can contract simultaneously, and different priority is set to them; Multicast area is meant the geographic range that the VGCS service communication is covered, and is base unit with radio honeycomb sub-district (Cell), can be made up of one or more cellular cells.These sub-districts can belong to same mobile switching centre (MobileSwitching Center is called for short " MSC "), also can belong to different MS C.Each related cell has a multicast channel during calling, wherein up link is only used (group emission mode) for current speaker, all hearers wait on down link (group receive mode), the notification message of relevant multicast is gone up broadcasting at notification channel (Notification Channel is called for short " NCH ").
The group ID that service-user is contracted by dialing can call out the service-user of all this group ID that contracted in multicast area.After service-user receives multicast notification message in the multicast area,, then can add this calling if be this group membership; If be not this group membership, then ignore this multicast notification message.In the process that multicast carries out, this outer group membership of multicast area enters this multicast area and also can receive multicast notification message, and can add calling.
Relate to a plurality of MSC if call out, be responsible for the management of multicast so by one of them MSC, be referred to as Anchor MSC (anchor point MSC), other MSC then is Relay MSC (relay MSC).Anchor MSC is responsible for setting up all connections, is included in the connection of the designated cell of this MSC, relevant RelayMSC and dispatching desk, and passes through the distribution that a meeting bridge is finished voice, and Relay MSC is to only setting up a link between the Anchor MSC.Relay MSC is responsible for the distribution of its affiliated subdistrict downlink voice.
VBS is professional to have similar business function to the VGCS business, and main difference is: have only broadcast originator to talk during the VBS service broadcast, other service-users do not have the right of speech, are in accepting state all the time.The dispatcher does not have the right of speech yet if not the promoter of broadcasting.Spoken user need not be by the PTT key.
The eMLPP business then can guarantee preferentially to set up the calling of high priority.Because many communications applications such as the automatic control of railway emergency call or train, all require network no matter to be under which kind of load state and all can set up these callings rapidly, even take place a sub-district when congested, for example, under the situations such as all radio frequencies and Traffic Channel are all occupied, the eMLPP business will be cut off the calling of low priority, the calling of preferentially setting up high priority immediately.
Describe according to gsm protocol [3GPP TS 03.68 V7.2.0], after multicast is initiated, in the sub-district, periodically send not multicast notification message with multicast broadcast channel information.As the travelling carriage that belongs to this multicast (Mobile Station, be called for short " MS ") detect the multicast notification message of not being with multicast broadcast channel information after, MS reports multicast push-notification-answer message for base station sub-system (Base Station Subsystem is called for short " BSS ").If idle Traffic Channel (Traffic Channel is called for short " TCH ") resource is arranged in this sub-district, then BSS can successfully distribute multicast broadcast channel.
BSS is after successfully distributing multicast broadcast channel, and channel release (channel release) message of multicast broadcast channel information is carried in broadcasting on the NCH channel.Multicast broadcast channel information in the MS decode channel release message will join on the multicast broadcast channel automatically, and this channel is monitored.
After multicast broadcast channel distributes, if BSS detects the MS that does not belong to this multicast in this sub-district, BSS will discharge the multicast broadcast channel that is distributed.Afterwards, if after having the MS that belongs to this multicast to enter this sub-district, these MS also can report multicast push-notification-answer message to BSS, distribute multicast broadcast channel thereby trigger BSS again.
In actual applications, there is following problem in such scheme: when BSS distributed sub-district multicast broadcast channel failure, MS can't add multicast.
Cause the main cause of this situation to be, because when not having idle TCH resource in the sub-district, BSS distributes the multicast broadcast channel failure, BSS sends channel release (channel releases) message to MS1, does not have the information of multicast broadcast channel in the message.MS1 enters idle condition.Like this, MS1 just can't join in the multicast.
Summary of the invention
In view of this, main purpose of the present invention is to provide multicast broadcast channel distributing method in a kind of voice multicast broadcast service, makes that MS can add multicast as much as possible when BSS sets up sub-district multicast broadcast channel failure.
For achieving the above object, the invention provides multicast broadcast channel distributing method in a kind of voice multicast broadcast service, comprise following steps:
If the network side base station sub-system is failed when setting up the multicast broadcast channel of sub-district, the travelling carriage transmitting channel that then needs to add this multicast broadcast channel in this sub-district distributes failed message, wherein carries the multicast broadcast channel information of the neighbor cell that this travelling carriage can use;
After described travelling carriage is received described channel allocation failed message,, add the multicast broadcast channel of the neighbor cell of appointment according to the multicast broadcast channel information of described neighbor cell.
Wherein, also comprise following steps:
Described travelling carriage detects the signal of neighbor cell, and to described base station sub-system reporting measurement reports message, the information of wherein carrying the neighbor cell that is detected;
Described base station sub-system can be with selecting one the neighbor cell of also having set up described multicast broadcast channel from described travelling carriage, the multicast broadcast channel information of this neighbor cell is carried in the described channel allocation failed message sends to this travelling carriage, wherein, the information of the neighbor cell in the measurement report message that reports according to this travelling carriage determines the neighbor cell that this travelling carriage can be used.
In this external described method, the information of carrying N neighbor cell in the described measurement report message, and be arranged in order according to the signal quality of these sub-districts, wherein N is a nonnegative integer.
In this external described method, also comprise following steps:
If described travelling carriage can have two at least with the neighbor cell that has also had described multicast broadcast channel, the information of the neighbor cell in the measurement report message that reports according to this travelling carriage then, select the neighbor cell of signal quality optimum, the multicast broadcast channel information of this neighbor cell is carried in the described channel allocation failed message sends to described travelling carriage.
In this external described method, also comprise following steps:
If described travelling carriage can be a zero with the neighbor cell that has also had described multicast broadcast channel, then described base station sub-system sends described channel allocation failed message to this travelling carriage, does not wherein carry multicast broadcast channel information;
Described travelling carriage changes idle condition over to according to the described channel allocation failed message of receiving.
In this external described method, if carry the information of zero neighbor cell in the described measurement report message, then described travelling carriage can with neighbor cell be zero.
In this external described method, if carry the information of one or more neighbor cells in the described measurement report message, and these neighbor cells are all outside the multicast area of this voice multicast broadcast service, then described travelling carriage can with neighbor cell be zero.
In this external described method, if described travelling carriage can with one or more neighbor cells all when setting up described multicast broadcast channel, fail, then described travelling carriage can with and the neighbor cell of having set up described multicast broadcast channel be zero.
In this external described method, also comprise following steps:
After described voice multicast broadcast service was initiated, described base station sub-system is the periodic broadcast multicast notification message in described multicast area, does not wherein carry multicast broadcast channel information;
After described travelling carriage receives described multicast notification message, return multicast push-notification-answer message to described base station sub-system;
Described base station sub-system is set up the multicast broadcast channel of described travelling carriage current area according to the described multicast push-notification-answer message of receiving.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, BSS sets up under the situation of multicast broadcast channel failure of sub-district in the VGCS/VBS business, needs in this sub-district add this professional MS transmitting channel and distribute failed message, wherein carry the multicast broadcast channel information of the neighbor cell that this MS can use, this MS adds the multicast broadcast channel of the neighbor cell of appointment then according to the multicast broadcast channel information of neighbor cell.Like this, when BSS set up the multicast broadcast channel failure of sub-district, MS can improve user experience as much as possible by the multicast broadcast channel adding VGCS/VBS business of neighbor cell.
Description of drawings
Fig. 1 is according to multicast broadcast channel distributing method flow chart in the VGCS/VBS business of first embodiment of the invention;
Fig. 2 is according to multicast broadcast channel distributing method flow chart in the VGCS/VBS business of second embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
When the present invention distributes failure at the multicast broadcast channel of BSS, under the situation of conditions permit, BSS can be notified to MS with the multicast broadcast channel information of the same multicast of MS neighbor cell, thereby MS can join in the multicast broadcast channel of neighbor cell according to this information, carries out the VGCS/VBS business.Wherein, conditions permit is meant the one or more available neighbor cells of having of MS and has at least a neighbor cell to set up the multicast broadcast channel of this multicast.Available neighbor cell is meant that the signal strength signal intensity of this neighbor cell satisfies the primary demand of this MS.
Multicast broadcast channel distributing method as shown in Figure 1 in the VGCS/VBS business of first embodiment of the invention.
In step 101, after the professional initiation of VGCS/VBS, periodicity broadcast group broadcast notification message on the NCH channel of BSS in multicast area owing to also do not set up multicast broadcast channel, does not therefore carry multicast broadcast channel information in this multicast notification message.
In step 102, after the MS among the sub-district A in the multicast area receives multicast notification message,, then return multicast push-notification-answer message to BSS if this MS is the member of this multicast group.
In step 103, BSS is according to the multicast push-notification-answer message of receiving, set up the multicast broadcast channel of MS current area, if set up the multicast broadcast channel success, then according to prior art, return the message of carrying this multicast broadcast channel information to MS, MS adds the multicast broadcast channel of this sub-district according to this message; If because some reasons, for example current area does not have idle TCH resource, make and set up the multicast broadcast channel failure, then enter step 104.
In step 104, according to prior art, MS can detect the signal of neighbor cell, and to BSS periodicity reporting measurement reports (measurement report) message, wherein carry the information of the individual neighbor cell of N (N is a nonnegative integer) that is detected, and be arranged in order according to the signal quality of these sub-districts.Usually, per 480 milliseconds of MS report the one-shot measurement report message.
In step 105, when multicast broadcast channel when failure that BSS sets up the sub-district, the information of the neighbor cell in the measurement report message that BSS reports according to this MS determines the neighbor cell that this MS can use.
If MS can with and the neighbor cell that had multicast broadcast channel have two at least, the information of the neighbor cell in the measurement report message that reports according to this MS of BSS is then selected the neighbor cell of a signal quality optimum.Enter step 106.
In step 106, BSS distributes failed message, the multicast broadcast channel information of wherein carrying the neighbor cell of the selected optimum of BSS to this MS transmitting channel.In addition, said here channel allocation failed message also can be channel release (channel release) message of prior art.
In step 107, after MS receives the channel allocation failed message,, monitor and add the multicast broadcast channel of the neighbor cell of appointment, thereby can receive corresponding VGCS/VBS business according to the multicast broadcast channel information of the neighbor cell in this message.Like this, although BSS sets up the multicast broadcast channel failure of sub-district, MS can add the VGCS/VBS business by the multicast broadcast channel of neighbor cell, thereby has improved user experience.
Multicast broadcast channel distributing method as shown in Figure 2 in the VGCS/VBS business of second embodiment of the invention.
In step 205, when BSS sets up the multicast broadcast channel failure of sub-district, BSS from MS can with and set up the neighbor cell of multicast broadcast channel and selected one, wherein, the information of the neighbor cell in the measurement report message that reports according to this MS determines the neighbor cell that this MS can use.
If MS can be a zero with the neighbor cell of also having set up multicast broadcast channel, then enter step 206.Specifically, following three kinds of situations are arranged:
If carry the information of zero neighbor cell in the measurement report message, then MS can with neighbor cell be zero;
If carry the information of one or more neighbor cells in the measurement report message, and these neighbor cells are all outside the multicast area of this VGCS/VBS business, then MS can with neighbor cell be zero;
If MS can with one or more neighbor cells all when setting up multicast broadcast channel, fail, for example, this MS can with neighbor cell have two, but all failing owing to there being idle TCH resource to cause setting up multicast broadcast channel of these two sub-districts, then MS can be a zero with the neighbor cell of also having set up multicast broadcast channel.
In step 206, BSS distributes failed message to this MS transmitting channel, does not wherein carry multicast broadcast channel information.
In step 207, MS is according to the channel allocation failed message of receiving, owing to there is not multicast broadcast channel information, MS changes idle condition over to.
According to above-mentioned execution mode, it is readily appreciated by a person skilled in the art that employing the inventive method, each sub-district multicast broadcast channel resource that can farthest utilize MS to use, make network side to have improved user experience as much as possible for MS provides VGCS/VBS business support.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. multicast broadcast channel distributing method in the voice multicast broadcast service is characterized in that, comprises following steps:
If the network side base station sub-system is failed when setting up the multicast broadcast channel of sub-district, the travelling carriage transmitting channel that then needs to add this multicast broadcast channel in this sub-district distributes failed message, wherein carries the multicast broadcast channel information of the neighbor cell that this travelling carriage can use;
After described travelling carriage is received described channel allocation failed message,, add the multicast broadcast channel of the neighbor cell of appointment according to the multicast broadcast channel information of described neighbor cell.
2. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 1 is characterized in that, also comprises following steps:
Described travelling carriage detects the signal of neighbor cell, and to described base station sub-system reporting measurement reports message, the information of wherein carrying the neighbor cell that is detected;
Described base station sub-system can be with selecting one the neighbor cell of also having set up described multicast broadcast channel from described travelling carriage, the multicast broadcast channel information of this neighbor cell is carried in the described channel allocation failed message sends to this travelling carriage, wherein, the information of the neighbor cell in the measurement report message that reports according to this travelling carriage determines the neighbor cell that this travelling carriage can be used.
3. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 2, it is characterized in that, carry the information of N neighbor cell in the described measurement report message, and be arranged in order according to the signal quality of these sub-districts, wherein N is a nonnegative integer.
4. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 3 is characterized in that, also comprises following steps:
If described travelling carriage can have two at least with the neighbor cell that has also had described multicast broadcast channel, the information of the neighbor cell in the measurement report message that reports according to this travelling carriage then, select the neighbor cell of signal quality optimum, the multicast broadcast channel information of this neighbor cell is carried in the described channel allocation failed message sends to described travelling carriage.
5. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 3 is characterized in that, also comprises following steps:
If described travelling carriage can be a zero with the neighbor cell that has also had described multicast broadcast channel, then described base station sub-system sends described channel allocation failed message to this travelling carriage, does not wherein carry multicast broadcast channel information;
Described travelling carriage changes idle condition over to according to the described channel allocation failed message of receiving.
6. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 5 is characterized in that, if carry the information of zero neighbor cell in the described measurement report message, then described travelling carriage can with neighbor cell be zero.
7. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 5, it is characterized in that, if carry the information of one or more neighbor cells in the described measurement report message, and these neighbor cells are all outside the multicast area of this voice multicast broadcast service, then described travelling carriage can with neighbor cell be zero.
8. multicast broadcast channel distributing method in the voice multicast broadcast service according to claim 5, it is characterized in that, if described travelling carriage can with one or more neighbor cells all when setting up described multicast broadcast channel, fail, then described travelling carriage can with and the neighbor cell of having set up described multicast broadcast channel be zero.
9. according to multicast broadcast channel distributing method in each described voice multicast broadcast service in the claim 1 to 8, it is characterized in that, also comprise following steps:
After described voice multicast broadcast service was initiated, described base station sub-system is the periodic broadcast multicast notification message in described multicast area, does not wherein carry multicast broadcast channel information;
After described travelling carriage receives described multicast notification message, return multicast push-notification-answer message to described base station sub-system;
Described base station sub-system is set up the multicast broadcast channel of described travelling carriage current area according to the described multicast push-notification-answer message of receiving.
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| CNB2006100257726A CN100438701C (en) | 2006-04-17 | 2006-04-17 | Multicast broadcast channel distributing method in voice multicast broadcast service |
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| CNB2006100257726A CN100438701C (en) | 2006-04-17 | 2006-04-17 | Multicast broadcast channel distributing method in voice multicast broadcast service |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095419A1 (en) * | 2007-02-06 | 2008-08-14 | Huawei Technologies Co., Ltd. | Method for allocating dedicated channel and base station device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3083363B2 (en) * | 1991-09-20 | 2000-09-04 | 明星電気株式会社 | Incoming call system for cordless button telephone system |
| GB9714563D0 (en) * | 1997-07-10 | 1997-09-17 | Intellprop Ltd | Videotelephoney |
| CA2210207A1 (en) * | 1997-07-11 | 1999-01-11 | Telecommunications Research Laboratories | Distributed preconfiguration of spare capacity in closed paths for network restoration |
| US6728540B1 (en) * | 1998-03-09 | 2004-04-27 | Avaya Technology Corp. | Assisted handover in a wireless communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008095419A1 (en) * | 2007-02-06 | 2008-08-14 | Huawei Technologies Co., Ltd. | Method for allocating dedicated channel and base station device thereof |
| CN101242632B (en) * | 2007-02-06 | 2011-11-16 | 华为技术有限公司 | A method and base station device for allocating dedicated channel |
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| CN100438701C (en) | 2008-11-26 |
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Effective date of registration: 20180710 Address after: London, England Patentee after: GW partnership Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. Effective date of registration: 20180710 Address after: California, USA Patentee after: Global innovation polymerization LLC Address before: London, England Patentee before: GW partnership Co.,Ltd. |
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