CN1968456B - Group-call/multicast establishing method and system - Google Patents
Group-call/multicast establishing method and system Download PDFInfo
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- CN1968456B CN1968456B CN2006100790636A CN200610079063A CN1968456B CN 1968456 B CN1968456 B CN 1968456B CN 2006100790636 A CN2006100790636 A CN 2006100790636A CN 200610079063 A CN200610079063 A CN 200610079063A CN 1968456 B CN1968456 B CN 1968456B
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Abstract
The invention relates to a multicast/group cast building method and relative system, wherein said method comprises that: a, sending channel request that requests to distribute service channel; b, feeding back confirmation; c, distributing the service channel. The invention can use quick service channel as the signal exchange channel in multicast/group cast building process, to accelerate the process.
Description
Technical field
The present invention relates to the group-call/multicast technology in the moving communicating field, relate to particularly that a kind of what realize quick group calling in based on the trunking communication network of GSM (Global System for Mobile Communication, global system for mobile communications) is the method and system of group-call/multicast assignment Traffic Channel.
Background technology
GSM is present general a kind of mobile communication system, except realizing the basic mobile communication business that people also develop the technology that realizes group calling communication in GSM.With the main application system GSM-R of group-call/multicast technology system is example, and this system realizes a kind of communication system of group-call/multicast the earliest, is that of Europe formulation overlaps the system that is used for the railway mobile communication.GSM-R with the gsm communication technology as service bearer, by eMLPP (enhanced Multi-Lever Precedence and Pre-emption, the enhancement mode multipriority and take the lead) the professional travelling carriage (MS) of giving provides VGCS (Voice Group Call Service, voice group call service) and VBS group services such as (Voice Broadcasting Service, voice multicast business).
VGCS business among the GSM-R is to be implemented in that a plurality of people can talk in the wireless communication system, the task that more people can monitor, and hearer's quantity is unrestricted; VBS business among the GSM-R is to realize 1 people's speech, the business that a plurality of people monitor.The member who participates in the VGCS calling comprises two classes: dispatcher and service-user.
The VGCS service call only permit at any time 1 service-user and at the most 5 dispatchers talk simultaneously.The service-user that is in listen state can be by robbing up operation, promptly press PTT (Push To Talk) key and obtain speaking right participation speech, robbing up operation carries out according to the mode of " First come first served ", who gets earlier and speaks whom, and other service-users have only just can continue to rob up operation when up free time.The dispatcher so need not to rob up operation, can participate in speech owing to have the designated lane of oneself at any time.
VGCS permission user is established to the one group of user's who belongs to a certain specified services district and GID (Group ID, group identifier) calling, and dispatchers all during the calling can make a speech, but all service-users are seized a data feedback channel.Service area can be by some same MSC (Mobile Service SwitchingCenter that belong to, mobile services switching centre) or the sub-district of different MS C form, each related cell has a group calling passage during calling, wherein up link is only used for the current speaker under the group emission mode, all hearers keep the marquis on the down link of group receive mode, the notification message of relevant group calling is gone up broadcasting at NCH (NotificationChannel, notification channel).
VBS and VGCS business are similar substantially, and the main difference part is: have only call initiator to talk during VBS calls out, other members are in accepting state all the time.Spoken user need not be by the PTT key.
The group-calling service that eMLPP business among the GSM-R can provide different stage for the different mobile stations of using VGCS business or VBS business makes different travelling carriages enjoy the different group calling authorities of using VGCS business or VBS business.For example, the eMLPP business can be divided into three grades with the group calling of travelling carriage according to the difference of call set-up time: 1 grade for setting up fast, and group calling settling time is 1-2 second; 2 grades is normal foundation, and group calling settling time was less than 5 seconds; 3 grades are to set up at a slow speed, and group calling settling time was less than 10 seconds.
Such as public security and fire-fighting, need set up group-call/multicast for some particular services as soon as possible.As depicted in figs. 1 and 2, it is the flow chart of the quick group calling of eMLPP business realizing among the available technology adopting GSM-R.Fig. 1 simple displaying is simplified flow process from channel request to ten that connect.Fig. 2 then shows the idiographic flow that comprises signaling process between each unit of network.Suppose that the MS and the interior MS of group call region that carry out group calling are administered by same MSC, its concrete steps of setting up group calling are:
Initiate the quick group-calling service request of Mobile Origination of group calling, this MS reports allocated channel request (CHANNEL REQUEST) to affiliated BSS (BaseStation sub-System, base station sub-system);
After this BSS receives this request, give this travelling carriage assignment reverse link traffic channel, and wait for Assignment Command (IMMEDIATE ASSIGNMENT) message immediately;
MS begins assignment procedure immediately after receiving immediately Assignment Command message, and its effect is that the request of network based travelling carriage distributes a signaling channel, is used for call setup initial procedure Signalling exchange.The signaling channel of this distribution can be SDCCH (SD channel, an independent proprietary control channel), also can be TCH (Traffic Channel).Specifically be on the SD channel, send carry IMM SETUP message Asynchronous Balanced Mode message (SABM) message link setup is set; This MS reports layer three business request information by BSS to MSC on the signaling channel that is distributed, layer three business request information are quick group-call/multicast request, and return notification message;
MSC determines that this is called out is that quick group-call/multicast is called out after receiving these layer three service request, then checks the record at VLR (VLR Visitor Location Register), judges whether this MS has the calling authority of quick this group-call/multicast of initiation, if having, carries out next step; Otherwise, discharge this group-call/multicast request and inform failure;
Owing to be provided with the initiation group calling authority of all MS in advance at VLR, inquiry VLR just can obtain the group calling authority of this MS;
The BSS of MSC under this MS sends assignment request message (ASSIGNMENT_REQUEST), the beginning assignment procedure.BSC sends Assignment Command message to MS.SD channel signaling switch mode is converted to TCH channel signaling interactive mode;
Sending SABM message by MS to BTS begins, BSS sets up group-calling channel and the group-calling channel from this BSS to MSC from this MS to this BSS, send assignment to MSC after BSS sets up group-calling channel and finishes and finish message (ASSIGNMENT_COMPLETE), call service group's sign (Group ID) that message is carried this MS is finished in this assignment;
MSC inquires about group call reference and group calling attribute information according to the CID (Cell ID, cell ID) of the MS of Group ID that receives and detected initiation group calling to GCR (Group Call Register, Group Call Register), thereby determines the scope of group calling;
GCR returns group call reference and attribute, and group calling is labeled as calls out; GCR deposits group call reference and group calling attribute, as: the regional extent of group calling, the CID that has according to GID and this MS just can obtain group call reference and group calling attribute;
After MSC receives the group calling attribute, determine the group calling scope, after the BSS of administration group call region carries out being connected of A interface circuit, send group calling assignment request (ASSIGNMENTREQUEST) for the BSS of administration group call region;
After the BSS of administration group call region receives this request, after cell allocation land circuit resource and Radio Resource in the group call region, send the group calling assignment to MSC and finish message, and send the group calling notification message for the sub-district in group call region; At last between BSC and BTS, carry out the multiple tracks Signalling exchange to discharge temporary transient signaling channel;
After the notified message of the MS of sub-district, finally set up the group-call/multicast channel in the group call region, MS goes to group-calling channel and monitors.
More than, the cost of assignment procedure immediately group-call/multicast of the prior art is set up the too many time in the flow process.Distribute a signaling channel because assignment immediately is the request according to travelling carriage, the signaling channel of this distribution can be SDCCH, also can be TCH.Immediately time of connecting of assignment TCH short more a lot of than the time of distributing SDCCH to connect, the TCH piece be 20ms at interval, the SDCCH block gap is 235ms, after therefore connecting, signaling in the speed that transmits on the TCH also than fast a lot of on SDCCH.And in assignment procedure immediately, network selecting is distributed SDCCH or TCH, be the situation that takies according to channel, and the cause value of channel request waits and judges.For example be the channel request of urgent call for cause value, general distribution T CH.In addition, the channel request cause value that group-call/multicast is called out is the same with the cause value of ordinary call, network can only perhaps distribute SDCCH as signaling channel to all travelling carriages that make a call to all travelling carriage distribution T CH that make a call as signaling channel.But existing network can't judge before the assignment signalling channel whether the calling that travelling carriage will be initiated is that group-call/multicast is called out, and it is long therefore often to cause group-call/multicast to set up flow process, influences in time carrying out of group-calling service.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of fast for the method for group-call/multicast assignment Traffic Channel.
The technical problem to be solved in the present invention be and provide a kind of high speed for the system of group-call/multicast assignment Traffic Channel.
For solving above-mentioned first technical problem, the objective of the invention is to be achieved through the following technical solutions: provide a kind of for the method for group-call/multicast assignment Traffic Channel, comprise step: A, end side send the channel request that requires the assignment Traffic Channel, described channel request carries the cause value that predefined representative group-call/multicast is called out, and the cause value that described predefined representative group-call/multicast is called out uses the untapped part of channel request cause value to define; The cause value that the base transceiver station of C, network side is called out according to described representative group-call/multicast determines that type of call is that group-call/multicast is called out, according to described group-call/multicast type of call assignment Traffic Channel immediately; The base transceiver station of D, described network side is to mobile services switching centre reporting group call/multicast initial request messages; E, described mobile services switching centre return the group-call/multicast acknowledge message to travelling carriage after receiving that group-call/multicast is initiated request and confirmed the calling authority, set up the group-call/multicast link.
It is described that to comprise the cause value of representing group-call/multicast to call out be " 01100001 ", " 01100101 " or " 01100011 ".
The described Traffic Channel step of assignment immediately among the step C is to send from travelling carriage Asynchronous Balanced Mode message is set.
Described transmission is provided with Asynchronous Balanced Mode message: adopt to steal the frame mode send carry SETUP message Asynchronous Balanced Mode message is set.
For solving above-mentioned second technical problem, the objective of the invention is to be achieved through the following technical solutions: a kind of system of group-call/multicast assignment Traffic Channel that is is provided, comprises channel request sending module and Traffic Channel Assignment module;
Described channel request sending module sends the channel request that requires the assignment Traffic Channel to base transceiver station, described channel request carries the cause value that predefined representative group-call/multicast is called out, and the cause value that described predefined representative group-call/multicast is called out uses the untapped part of channel request cause value to define; After described base transceiver station is received this channel request, determine that according to the cause value that described representative group-call/multicast is called out type of call is that group-call/multicast is called out; The Traffic Channel Assignment module is operated according to described group-call/multicast type of call assignment Traffic Channel immediately then, and base transceiver station is initiated request to mobile services switching centre reporting group call/multicast; Described mobile services switching centre returns the group-call/multicast acknowledge message to the affiliated travelling carriage of described channel request sending module after receiving group-call/multicast initiation request and confirming the calling authority, sets up the group-call/multicast link.
More than first technical scheme as can be seen because the present invention's signaling of adopting the assignment procedure immediately of assignment Traffic Channel immediately to set up travelling carriage and network when group-call/multicast is set up is connected.Promptly in the cause value of article one signaling-channel request that network is initiated, indicate the group-call/multicast type of call at travelling carriage, allow this type of call of Network Recognition be group-call/multicast, thus the Signalling exchange of speed of assignment immediately when Traffic Channel is set up in order to group-call/multicast faster.Overcome before the assignment procedure immediately that the prior art group-call/multicast sets up that network can't discern that group-call/multicast is called out and the frequent defective of assignment SD channel immediately, so accelerate the initiation process of group-call/multicast greatly.
More than second technical scheme as can be seen because the present invention sets up channel request sending module and Traffic Channel Assignment module, the signaling that adopts the assignment procedure immediately of assignment Traffic Channel immediately to set up travelling carriage and network when group-call/multicast is set up is connected.Be that the channel request sending module is indicated the group-call/multicast type of call at travelling carriage in the cause value of article one signaling-channel request that network is initiated, allow this type of call of Network Recognition be group-call/multicast, thus the Signalling exchange when allowing speed of Traffic Channel Assignment module assignment immediately Traffic Channel being set up in order to group-call/multicast faster.Overcome before the assignment procedure immediately that the prior art group-call/multicast sets up that network can't discern that group-call/multicast is called out and the frequent defective of assignment SD channel immediately, so accelerate the initiation process of group-call/multicast greatly.
Description of drawings
Fig. 1 is the simplified flow chart of the quick group calling of existing techniques in realizing;
Fig. 2 is the particular flow sheet that comprises Signalling exchange between each unit of network of Fig. 1;
Fig. 3 is that the present invention is the simplified flow chart of the method for group-call/multicast assignment Traffic Channel;
Fig. 4 is the particular flow sheet that comprises Signalling exchange between each unit of network of Fig. 3;
Fig. 5 is that the present invention is the functional block diagram of the system of group-call/multicast assignment Traffic Channel.
Embodiment
Basic principle of the present invention is: the signaling that adopts the assignment procedure immediately of assignment Traffic Channel immediately to set up travelling carriage and network when group-call/multicast is set up is connected.And channel request is the unique message that travelling carriage can report before the assignment signalling channel in the assignment procedure immediately, therefore in the channel request cause value, indicate the group-call/multicast type of call, the Signalling exchange when Traffic Channel of assignment is immediately set up in order to group-call/multicast behind this type of call of Network Recognition.
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is further elaborated.
Consult Fig. 3 and Fig. 4, be respectively the present invention be group-call/multicast assignment Traffic Channel method simplified flow chart and comprise the particular flow sheet of Signalling exchange between the network element.Said method comprising the steps of:
A, transmission require the channel request of assignment Traffic Channel;
At first travelling carriage sends call request to network side.This call request is to be the beginning with travelling carriage to base transceiver station channel request (CHANNEL REQUIRED).Consult the channel request cause value tabulation of table one, described channel request message comprises cause value " 01100001 ", " 01100101 " or " 01100011 " of representing group-call/multicast to call out.Base transceiver station receives after the channel request that with its reporting base station control desk, base station control station activates Random Access Channel.
| Cause value | Implication |
| 101xxxxx | Urgent call (Emergency cail) |
| 110xxxxx | Call re-establishment, used traffic channel full rate in the past, though perhaps used half rate in the past, it is 1 (TCH/Hwasinuse or TCH/Hwasinusebutthenetwork doesnot setNECI bit to 1) that network is not provided with newly-built reason indication parameter |
| 011010xx | Half rate was used in call re-establishment in the past, and the newly-built reason indication parameter of network settings is 1 (Callre-establishment; TCH/H was in use and the network sets NECI bit to 1) |
| 011011xx | Half rate+half rate was used in call re-establishment in the past, and the newly-built reason indication parameter of network settings is 1 (Call re-establishment; TCH/H+TCH/H was in use and the network sets NECI bit to 1) |
| 100xxxxx 0010xxxx 0011xxxx 0001xxxx | Table 9.1.8.2 (Answer to paging See Table 9.1.8.2.) is seen in the response paging |
| 111xxxxx1 | Make a call and needs use traffic channel full rate, perhaps make a call and network newly-built reason indication parameter is not set is 1, perhaps can adopt flow process that SDCCH finishes and network that newly-built reason indication parameter is not set is 1 (Originating call and TCH/F is needed, or originating call and the network does not set NECIbit to 1, or procedures that can be completed with a SDCCH and the network does not setNECI bitto 1.) |
| 0100xxxx | Dual rate Mobile Origination audio call, half rate is enough and travelling carriage support half rate is used as audio call and the newly-built reason indication parameter of network settings is 1 (Originating speech call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for speech calls and the networksetsNECIbitto 1.) |
| 0101xxxx | Dual rate Mobile Origination data call, half rate is enough and travelling carriage support half rate is used as data call and the newly-built reason indication parameter of network settings is 1 (Originating data call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for data calls and the networksets NECI bit to 1.See note 5) |
| 000xxxxx | It is 1 (Location updating and the network doesnot setNECI bitto 1) that position renewal and network are not provided with newly-built reason indication parameter |
| 0000xxxx | The position is upgraded and the newly-built reason indication parameter of network settings is 1 (Location updating and the network setsNECI bitto 1) |
| 0001xxxx | Other flow process and newly-built reason indication parameter of network settings that can use SDCCH to finish is 1 (Other procedureswhich can be completed with note l an SDCCH and the network sets NECI bit to 1) |
| 011110xx 01111x0x 01111xx0 | The single time slot uplink of one stage grouping access request needs a PDCH (Packet Data Channel) (One phase packetaccess with request for single timeslot uplink transmission; One PDCH is needed.) |
| 01110xxx | Monolithic divides group access; Need of PDCH, being used for the two-stage divides group access or other RR (Radio Resource) signaling (Single block packet access; One block period on a PDCH is needed for two phase packetaccess or other RR signalling purpose.) |
| 01100111 | Location Measurement Unit is set up (LMU establishment) |
| 01100xx0 | The visit of monolithic multimedia broadcast/multi broadcast business; Need of PDCH, be used to send business request information (the Single block MBMS access of multimedia broadcast/multi broadcast business; One block period on a PDCH is needed for transferof MBMS SERVICE REQUEST message.) |
| 01100x01 01100011 | Initiate group-call/multicast and call out (Originating VGCS/VBS call) |
| 01111111 | Keep (Reserved) |
Table one
In the last table, " 01100x01 ", " 01100011 " byte originally were defined as " not using ".The dedicated channel reason for claim value that the present invention adopts this byte to call out as group-call/multicast, enter the short calling flow process for the urgent call (travelling carriage is dialed " 110 " emergency call of etc.ing) of " 101xxxxx " as cause value, it is the group-call/multicast calling that network can be recognized this calling.
B, return acknowledge message;
When base transceiver station is received this channel request, recognize this calling and call out for group-call/multicast.So the affirmation message (IMMEDIATEASSIGNMENT COMMAND) of returning assignment immediately is to travelling carriage.Described acknowledge message contains traffic channel information to be described, and show that it is the group-call/multicast calling that network is recognized this calling, and the permission travelling carriage carries out this calling.
In addition, can pre-determine the group call region sub-district of this travelling carriage, its process is: in base station sub-system this travelling carriage is set in advance and calls out corresponding group call region sub-district corresponding relation with this time, base station sub-system is determined the corresponding group call region sub-district of this time calling according to the corresponding relation that sets in advance.
C, the described Traffic Channel of assignment immediately;
This step sends from travelling carriage Asynchronous Balanced Mode message (SABM) is set.Because having informed this calling of network in article one channel request signaling is that group-call/multicast is called out, network is recognized described channel request and is required the assignment Traffic Channel, so the described Traffic Channel of assignment is immediately called out to this.Specifically be that travelling carriage sends the Asynchronous Balanced Mode message that is provided with carry CM SERVICE REQUEST and enters assignment procedure immediately to base transceiver station, show that simultaneously this call request is that group-call/multicast initiates to ask.
D, reporting group call/multicast initial request messages are given base station controller;
After base transceiver station receives that the group-call/multicast of travelling carriage transmission is initiated request, this group-call/multicast is initiated request report layer three business request information (COMPLETE LAYER 3INFORMATION) to mobile services switching centre, layer three business request information are quick group-call/multicast request.
E, return the group-call/multicast acknowledge message;
Mobile services switching centre returns acknowledge message (CM SERVICE ACCEPT) to travelling carriage after receiving that group-call/multicast is initiated request and confirmed the calling authority.Receive with the group-call/multicast acknowledge message that sends identical frame number of group-call/multicast initial request messages and reference after link setup.
Base station controller sends ASSIGNMENT COMMAND message and shows promptly that to travelling carriage link setup begins.Described link setup is to set up base station sub-system to the group-calling channel between the travelling carriage;
Described link setup also can be to set up from mobile services switching centre group calling voice distributor until the part transmission channel between the wireless channel of group call region sub-district.
Described part transmission channel is to the A interface circuit the base station sub-system of administering the group call region sub-district from mobile services switching centre group calling voice distributor; Perhaps be the A interface circuit and the land circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district; Perhaps be the A interface circuit and the radio-circuit resource of the base station sub-system of administering the group call region sub-district the base station sub-system from mobile services switching centre group calling voice distributor to administration group call region sub-district to the group call region sub-district.
Behind the link setup, base transceiver station sends business and accepts, is provided with parameter, link message to travelling carriage, shows that network side is ready, initiates group call region sub-district group calling/multicast channel of group calling and sets up.
F, transmitting channel schema modification message are to travelling carriage;
After receiving the assignment request that mobile services switching centre sends, base station controller transmitting channel schema modification message is to travelling carriage.Because assigned traffic channel is the Signalling exchange channel before, so do not need in this step to carry out the link setup flow process again one time, only needing to revise current channelling mode is the signaling switch mode.
G, Return Channel schema modification response message, the group-call/multicast channel is set up;
Base station controller also needs to send ASSIGNMENT COMPLETE message and shows to mobile services switching centre and can carry out group-call/multicast.
Send link message after the step of travelling carriage from mobile services switching centre among Fig. 4, before the release data feedback channel, carry out the multiple tracks Signalling exchange to set up other sub-district group calling/multicast links, other sub-district group callings/multicast channel is set up.
H, group calling promoter talk in group-calling channel or monitor;
After group-call/multicast was set up, the travelling carriage in the group call region sub-district went to group-calling channel, and the group calling promoter monitors at this channel.
For saving time, present embodiment is transferred to the back with steps such as group calling purview certification group calling attribute obtain:
I, carry out the group-call/multicast purview certification;
Mobile services switching centre is checked the record at travelling carriage VLR Visitor Location Register (VLR), judge whether this travelling carriage has the calling authority of quick this group-call/multicast of initiation, if have, the travelling carriage in the group call region sub-district continues to monitor at the group-call/multicast channel; Otherwise the quick group-call/multicast of this travelling carriage will be moved service switching center and discharge this quick group-call/multicast call failure.
Owing to be provided with the initiation group-call/multicast calling authority of all travelling carriages in advance at VLR, so inquiry VLR just can obtain the group-call/multicast authority of this travelling carriage.
J, carry out the group-call/multicast attribute and obtain.
In this step, mobile services switching centre is inquired about the group-call/multicast attribute information according to Group ID that initiates quick group calling travelling carriage and Cell ID to Group Call Register; Group Call Register returns the group-call/multicast attribute, and group-call/multicast is labeled as calls out; Mobile services switching centre is received the group-call/multicast attribute.
Described group-call/multicast attribute comprises group-call/multicast zone cell list, group-call/multicast area identification, group calling priority, dispatching desk information etc.
Owing to comprise in the group-call/multicast attribute and initiate the pairing group call region cell list of this time group-call/multicast, so the present invention can make mobile services switching centre determine the sub-district in group-call/multicast zone by the group-call/multicast zone cell list of group-call/multicast register-stored, thereby whether the good service channel of sub-district, zone from the mobile services switching centre to the group-call/multicast of judging shared foundation is to determine the transmission channel of the regional sub-district of group-call/multicast to some extent to institute, if then the travelling carriage in the sub-district, group-call/multicast zone continues to monitor at the group-call/multicast channel; Otherwise, then can set up transmission channel once more from mobile services switching centre to the sub-district, group-call/multicast zone that does not take.
From as can be seen above, the signaling that the present invention adopts the assignment procedure immediately of assignment Traffic Channel immediately to set up travelling carriage and network when group-call/multicast is set up is connected.Promptly in the cause value of article one signaling-channel request that network is initiated, indicate the group-call/multicast type of call at travelling carriage, allow this type of call of Network Recognition be group-call/multicast, thus the Signalling exchange of speed of assignment immediately when Traffic Channel is set up in order to group-call/multicast faster.
Because the SD channel is just to comprise a piece in per 51 frames to be used to transmit signaling, 235ms just, and in the Traffic Channel, have 6 to be used to transmit signaling in per 26 frames, one of just every 20ms.So at link setup on the Traffic Channel with transmit signaling than average fast (235-20)/2=108ms on the SD channel.
In addition, because the assignment Traffic Channel immediately when initiating group-call/multicast in step C does not change to the channel of setting up the group-call/multicast link, no longer need the multiple tracks signalling interactive process that group-call/multicast is set up and confirmed in the prior art when therefore in step e, setting up the group-call/multicast link, therefore further save time the chance that reduces system load and make mistakes.
Therefore in addition, the transmitting channel schema modification message of step F does not need to return UA and replys signaling behind travelling carriage, further saves group-call/multicast settling time again.
Therefore, when group-call/multicast is called out, by travelling carriage active request network assignment speed immediately faster Traffic Channel carry out Signalling exchange, overcome before the assignment procedure immediately that the prior art group-call/multicast sets up that network can't discern that group-call/multicast is called out and the frequent defective of assignment SD channel immediately, so accelerate the initiation process of group-call/multicast greatly.
Present embodiment is transferred to whole flow process backmost with steps such as group calling purview certification group-call/multicast attribute obtain, has further saved the time.Certainly, also group calling purview certification group-call/multicast attribute can be obtained etc. and to carry out after step is arranged in step e.
Be to determine that this is called out is that quick group-call/multicast is called out after mobile services switching centre is received these layer three service request, then check record at VLR Visitor Location Register, judge whether this travelling carriage has the calling authority of quick this group-call/multicast of initiation,, carry out next step if having; Otherwise, discharge this group-call/multicast request and inform failure.
Described group calling purview certification group-call/multicast attribute obtaining step I, J also can adjust between step D and the E.
In the present invention's spirit scope, more changeable more execution mode can be arranged.Such as in step F, send SETUP message and can be provided with in the Asynchronous Balanced Mode message (SABM) in the travelling carriage transmission of step C to the step of mobile services switching centre link setup and finish.Be travelling carriage adopt to steal the frame mode send carry SETUP message Asynchronous Balanced Mode message link setup is set, to save the mutual of a signaling, save time; In the steps A, be not limited to " 01100x01 ", " 01100011 " byte in order to the cause value that shows the group-call/multicast request, can adopt the dedicated channel reason for claim value that other bytes are called out as group-call/multicast in the table one, adjust network side simultaneously, make it can recognize these cause values.
Consult Fig. 5, the present invention also proposes a kind of system of group-call/multicast assignment Traffic Channel that is, it comprises system equipment, travelling carriage 40 and operation maintenance equipment 20 3 parts composition.System equipment comprises base station sub-system 30 and network subsystem 10.Briefly, base station sub-system 30 provides the Radio Link between travelling carriage 40 and the network, and network subsystem 10 is responsible for handling the miscellaneous service request of travelling carriage 40, and it comprises mobile services switching centre 11.
Travelling carriage 40 for the user can direct control equipment, comprise channel request sending module 41.Travelling carriage 40 can be divided into handheld terminal, Vehicle mounted station according to operational environment and application purpose.Can also replace with dispatching desk, fixed station etc. in addition.
In the concrete operations, channel request sending module 41 is initiated request according to the Client-initiated group-call/multicast, indicates the group-call/multicast type of call at travelling carriage 40 in the channel request cause value that network is initiated, and requires the network assigned Traffic Channel.
Described base station controller 31 receive channel requests are also returned acknowledge message.Described acknowledge message is the immediate assignment message that contains traffic channel information.Traffic Channel Assignment module 311 is carried out the described Traffic Channel operation of assignment immediately then.
Travelling carriage 40 can send the Asynchronous Balanced Mode message that is provided with of carrying SETUP message and begin the described Traffic Channel of assignment immediately.
More than a kind ofly be described in detail for the method and system of group-call/multicast assignment Traffic Channel provided by the present invention, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. one kind is the method for group-call/multicast assignment Traffic Channel, it is characterized in that: comprise step:
A, end side send the channel request that requires the assignment Traffic Channel, described channel request carries the cause value that predefined representative group-call/multicast is called out, and the cause value that described predefined representative group-call/multicast is called out uses the untapped part of channel request cause value to define;
The cause value that the base transceiver station of C, network side is called out according to described representative group-call/multicast determines that type of call is that group-call/multicast is called out, according to described group-call/multicast type of call assignment Traffic Channel immediately;
The base transceiver station of D, described network side is to mobile services switching centre reporting group call/multicast initial request messages;
E, described mobile services switching centre return the group-call/multicast acknowledge message to travelling carriage after receiving that group-call/multicast is initiated request and confirmed the calling authority, set up the group-call/multicast link.
2. according to claim 1 is the method for group-call/multicast assignment Traffic Channel, it is characterized in that: the cause value that described representative group-call/multicast is called out is " 01100001 ", " 01100101 " or " 01100011 ".
3. according to claim 1 is the method for group-call/multicast assignment Traffic Channel, it is characterized in that: the described Traffic Channel step of the assignment immediately among the step C is to send from travelling carriage Asynchronous Balanced Mode message is set.
4. according to claim 3 is the method for group-call/multicast assignment Traffic Channel, it is characterized in that: described transmission is provided with Asynchronous Balanced Mode message and is: adopt to steal the frame mode send carry SETUP message Asynchronous Balanced Mode message is set.
5. according to claim 4 is the method for group-call/multicast assignment Traffic Channel, it is characterized in that: among the step C, the described channel request of identification requires the Traffic Channel of assignment, the described Traffic Channel of assignment immediately.
6. one kind is the system of group-call/multicast assignment Traffic Channel, it is characterized in that: comprise channel request sending module and Traffic Channel Assignment module;
Described channel request sending module sends the channel request that requires the assignment Traffic Channel to base transceiver station, described channel request carries the cause value that predefined representative group-call/multicast is called out, and the cause value that described predefined representative group-call/multicast is called out uses the untapped part of channel request cause value to define; After described base transceiver station is received this channel request, determine that according to the cause value that described representative group-call/multicast is called out type of call is that group-call/multicast is called out; The Traffic Channel Assignment module is operated according to described group-call/multicast type of call assignment Traffic Channel immediately then, and base transceiver station is initiated request to mobile services switching centre reporting group call/multicast; Described mobile services switching centre returns the group-call/multicast acknowledge message to the affiliated travelling carriage of described channel request sending module after receiving group-call/multicast initiation request and confirming the calling authority, sets up the group-call/multicast link.
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| CN101345911B (en) * | 2007-07-10 | 2012-05-23 | 华为技术有限公司 | Method, terminal and system for realizing enhanced railway emergency call |
| CN102438327A (en) * | 2010-09-29 | 2012-05-02 | 中兴通讯股份有限公司 | Group call channel establishing method, system and mobile switching center |
| WO2016004600A1 (en) * | 2014-07-10 | 2016-01-14 | Motorola Solutions, Inc. | Methods and systems for simultaneous talking in a talkgroup using a dynamic channel chain |
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| US5542093A (en) * | 1992-08-11 | 1996-07-30 | Telefonaktiebolaget Lm Ericsson | Method for redistributing dual mode mobile units to extended channel groups to reduce congestion in primary channel groups |
| US6377560B1 (en) * | 1998-10-09 | 2002-04-23 | Ericsson Inc. | Group call capability in a wireless network |
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