CN102118691B - Method and system for sending forward media stream - Google Patents
Method and system for sending forward media stream Download PDFInfo
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- CN102118691B CN102118691B CN200910238817.1A CN200910238817A CN102118691B CN 102118691 B CN102118691 B CN 102118691B CN 200910238817 A CN200910238817 A CN 200910238817A CN 102118691 B CN102118691 B CN 102118691B
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Abstract
The invention discloses a method for sending a forward media stream. The method comprises the following steps of: establishing a base station controller media interface gateway multicast table on a selection/distribution unit when a group call is established, adding a base station controller media interface gateway address related to cells in a group call dispatching cell into the multicast table, searching the base station controller media interface gateway multicast table by the selection/distribution unit after the selection/distribution unit receives the forward media stream, and sending the forward media stream to all base station controller media interface gateways listed in the multicast table. The invention also discloses a system for sending the forward media stream. By the multistage multicast method, link resources among the media interface gateways and of the Abis are saved, and the problem of the capacitance of a base station system (BSS) caused by the limited media interface resources of the BSS is solved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of sending method and system of forward media stream.
Background technology
Trunking communication refers to a kind of dispatching communication mode of special use, comprises special-purpose commander and dispatching communication, and in use cluster user can add calling simultaneously, and conversation is carried out with single work or half-duplex mode.
For example, the CDMA trunked communication system is based on the CDMA2000 exploitation, and CDMA technology and specific schedule communication system are combined.This system is except all business functions that possess the CDMA2000 system, also possesses the colony dispatching service function, can realize continuing fast, adopt semiduplex communication mode, real-time direct-connected " point-to-point " and " point-to-multipoint " Speech Communication have been realized, support the group-calling service of one-to-many, also support man-to-man individual calling business.
Group calling refers to a group user input group number on communication terminal after, press PoC (Push to Talk, abbreviation PTT) key just can be initiated group calling, after group calling is set up, by the competition right of speech, a user who obtains right of speech can be spoken to all terminals in same group, and other group user answers state in speech.
A cdma system is by MS (Mobile Station, travelling carriage) and BSS (Base Station System, base station system) form, wherein BSS belongs to wireless side, comprise BSC (Base Station Controller, base station controller) and BTS (Base Transceiver System, base station transceiver).After group calling is set up, the reverse speech frame (MS is to the Media Stream of BSS direction) of saying the user passes through PDC (PTT Disaptching Client by BSS, cluster client end) being transmitted to PDS (PTT Disaptching Server, trunking dispatch server) processes; After PDS processes, forward frame (BSS is to the Media Stream of MS direction) is sent to SDU (the Selection/Distribution Unit of BSC, selection/Dispatching Unit), then by SDU, these forward frame and Forward Signalling are forwarded to the Channel Elements of each BTS after multiplexing, then the forward traffic channel by different districts sends to and allly in dispatch area listens the user.
Can find out thus, a cluster multi call, SDU need to copy same forward media stream the Channel Elements that a lot of parts send to BTS, if the dispatch area of this group calling relates to 100 BTS, each BTS relates to again 3 Channel Elementss, the forward frame of each 20ms (millisecond) so, SDU just need to copy and send for 300 times.Certainly will greatly increase like this processing load of SDU, simultaneously also strengthened the forward process of BSC, BTS medium surface gateway, strengthened Abis mouth (An interface between BTS and BSC, base station controller and base station transceiver interface) transmission bandwidth of link, affected significantly the capacity of BSS system.
Summary of the invention
Problem in view of the above, the object of the present invention is to provide a kind of sending method and system of forward media stream, to solve the resource-constrained and BSS Capacity that causes of BSS medium surface.
According to an aspect of the present invention, a kind of sending method of forward media stream is provided, when group calling is set up, set up base station controller medium surface gateway multicast table on selection/Dispatching Unit, will comprise that the dependency basis station control medium surface gateway address of group calling scheduling in-zone cell joins in multicast table; Set up base station transceiver medium surface gateway multicast table on base station controller medium surface gateway, will comprise that the base station transceiver medium surface gateway address of group calling scheduling in-zone cell joins in multicast table; Set up the Channel Elements multicast table on base station transceiver medium surface gateway, will comprise that the Channel Elements address of group calling scheduling in-zone cell joins in multicast table; After selection/Dispatching Unit receives forward media stream, search base station controller medium surface gateway multicast table, forward media stream is sent to each base station controller medium surface gateway listed in multicast table; After base station controller medium surface gateway receives the forward media stream of selection/Dispatching Unit, search base station transceiver medium surface gateway multicast table, forward media stream is issued to each base station transceiver medium surface gateway listed in multicast table; After base station transceiver medium surface gateway receives the forward media stream of base station controller medium surface gateway, search the Channel Elements multicast table, forward media stream is issued to each Channel Elements listed in multicast table.
Preferably, after Channel Elements receives the forward media stream of base station transceiver medium surface gateway, by eating dishes without rice or wine, forward media stream is sent to each user in group calling.
Preferably, when having new base station controller medium surface gateway to add or leaving multicast group, the base station controller medium surface gateway multicast table on selection/Dispatching Unit is carried out to multicast member to be increased or deletion action.
Preferably, when having new base station transceiver medium surface gateway to add or leaving multicast group, the base station transceiver medium surface gateway multicast table on base station controller medium surface gateway is carried out to multicast member to be increased or deletion action.
Preferably, when having new Channel Elements to add or leaving multicast group, the Channel Elements multicast table on base station transceiver medium surface gateway is carried out to multicast member to be increased or deletion action.
Preferably, when group calling discharges, delete base station controller medium surface gateway multicast table, the base station transceiver medium surface gateway multicast table on base station controller medium surface gateway and the Channel Elements multicast table on base station transceiver medium surface gateway on selection/Dispatching Unit.
This method, due to the method that adopts multistage multicast, saved between the medium surface gateway and the link circuit resource of Abis, solved the resource-constrained and BSS Capacity that causes of BSS medium surface.
According to another aspect of the present invention, also provide a kind of transmitting system of forward media stream, comprised selection/Dispatching Unit, base station controller medium surface gateway and base station transceiver medium surface gateway, wherein:
Selection/Dispatching Unit is set up base station controller medium surface gateway multicast table thereon, the dependency basis station control medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after receiving forward media stream, search base station controller medium surface gateway multicast table, forward media stream is sent to each base station controller medium surface gateway listed in multicast table;
Base station controller medium surface gateway is set up base station transceiver medium surface gateway multicast table thereon, the base station transceiver medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives selection/Dispatching Unit, search base station transceiver medium surface gateway multicast table, forward media stream is issued to each base station transceiver medium surface gateway listed in multicast table;
Base station transceiver medium surface gateway is set up the Channel Elements multicast table thereon, the Channel Elements address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives base station controller medium surface gateway, search the Channel Elements multicast table, forward media stream is issued to each Channel Elements listed in multicast table.
Preferably: selection/Dispatching Unit is when having new base station controller medium surface gateway to add or leaving multicast group, and the base station controller medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station controller medium surface gateway is when having new base station transceiver medium surface gateway to add or leaving multicast group, and the base station transceiver medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station transceiver medium surface gateway is when having new Channel Elements to add or leaving multicast group, and the Channel Elements multicast table on it is carried out to multicast member to be increased or deletion action.
Native system, due to the method that adopts multistage multicast, saved between the medium surface gateway and the link circuit resource of Abis, solved the resource-constrained and BSS Capacity that causes of BSS medium surface.
The accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 shows the PTT group calling multicast table Establishing process figure according to the embodiment of the present invention;
Fig. 2 shows the multistage multicast transmission flow of the PTT group calling forward media stream figure according to the embodiment of the present invention;
Fig. 3 shows the system schematic according to the multistage multicast of PTT group calling forward media stream of the embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Individual calling business at the intrasystem normal speech of BSS and data service, PTT only just can realize the forwarding of Media Stream with mode of unicast, and the distribution of PTT group calling forward media stream need to be taked the mode of multistage multicast, so that the capacity of raising BSS system.SDU supports the soft handover function of mobile terminal, so SDU has in fact had the multicast functionality to BSC medium surface gateway.A kind of method for sending forward media stream provided by the invention preferably increases multicast table on BSC medium surface gateway, BTS medium surface gateway, be used for preserving the multicast member address, so that BSC medium surface gateway, BTS medium surface gateway also possess multicast functionality, thereby realize three grades of multicasts (SDU is to BSC medium surface gateway, the three grade multicasts of BSC medium surface gateway to BTS medium surface gateway and BTS medium surface gateway to Channel Elements) function of BSS system forward Media Stream.Multicast table is all similar, exactly Media Stream is sent to all destination addresses of next stage and joins in multicast table, creates when such table is service call and sets up, and the same with normal call, the information of multicast destination address has.Certainly, one-level multicast (SDU is to this one-level multicast of BSC medium surface gateway) or secondary multicast are (except SDU arrives this one-level multicast of BSC medium surface gateway, also have the multicast of BSC medium surface gateway to BTS medium surface gateway one-level) also can realize the present invention, only less better on effect, the present invention be take three grades of multicasts as the example explanation at this.
When the PTT group calling is set up, set up multicast table respectively on SDU, BSC medium surface gateway, BTS medium surface gateway.As shown in Figure 1:
Step S201 sets up BSC medium surface gateway multicast table on SDU, will comprise that the relevant BSC medium surface gateway address of group calling scheduling in-zone cell joins in multicast table, so that SDU carries out the multicast of forward media stream to these BSC medium surface gateways;
Step S202, set up BTS medium surface gateway multicast table on BSC medium surface gateway, the BTS medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, so that BSC medium surface gateway carries out the multicast of forward media stream to these BTS medium surface gateways;
Step S203 sets up the Channel Elements multicast table on BTS medium surface gateway, will comprise that the Channel Elements address of group calling scheduling in-zone cell joins in multicast table, so that BTS medium surface gateway carries out the multicast of forward media stream to these Channel Elementss.
When having new BSC medium surface gateway to add or leaving multicast group, the BSC medium surface gateway multicast table on SDU is carried out to multicast member to be increased or deletion action.
When having new BTS medium surface gateway to add or leaving multicast group, the BTS medium surface gateway multicast table on BSC medium surface gateway is carried out to multicast member to be increased or deletion action.
When having new Channel Elements to add or leaving multicast group, the Channel Elements multicast table on BTS medium surface gateway is carried out to multicast member to be increased or deletion action.
When the PTT group calling discharges, the BSC medium surface gateway multicast table on deletion SDU, the BTS medium surface gateway multicast table on BSC medium surface gateway, the Channel Elements multicast table on BTS medium surface gateway.
The flow process that the multistage multicast of PTT group calling forward media stream sends is as shown in Figure 2:
Step S301, SDU receives the forward medium stream packet of PDC, searches BSC medium surface gateway multicast table, then forward frame and Forward Signalling is sent to each BSC medium surface gateway listed in multicast table after multiplexing, realizes the first order multicast of BSS forward media stream;
Step S302, BSC medium surface gateway receives the forward medium stream packet of SDU, searches BTS medium surface gateway multicast table, then media stream message is transmitted to each BTS medium surface gateway listed in multicast table, realizes the second level multicast of BSS forward media stream;
Step S303, BTS medium surface gateway receives the forward medium stream packet of BSC medium surface gateway, searches the Channel Elements multicast table, then media stream message is transmitted to each Channel Elements listed in multicast table, realizes the third level multicast of BSS forward media stream.
Step S304, Channel Elements receives the forward medium stream packet of BTS medium surface gateway, by eating dishes without rice or wine, media stream message is sent to each user in the PTT group.
The present invention also provides a kind of transmitting system of forward media stream, and preferably, as shown in Figure 3, native system adopts three grades of multicasts to send forward media stream.In BSS, the multistage multicast of Media Stream adopts tree structure, minute three aspects:
SDU (selection/Dispatching Unit) multicast:
SDU is distributed to a plurality of BSC medium surface gateways by media stream message.When group calling is set up, SDU sets up BSC medium surface gateway multicast table, only need to send a message to each relevant BSC medium surface gateway just passable, need not copy and forward a media stream message to each Channel Elements under BTS again, so just greatly save the cpu resource of SDU, also saved the link circuit resource between SDU and BSC medium surface gateway simultaneously.
BSC medium surface gateway multicast:
When group calling is set up, on BSC medium surface gateway, set up the BTS multicast table.After BSC medium surface gateway receives the media stream message of SDU, by inquiry BTS multicast table, obtain needing the BTS address forwarded, media stream message is transmitted to successively to the medium surface gateway of each BTS, realize the multicast of second stage.Equally, by the classification multicast of second stage, save the cpu resource of BSC, BTS medium surface gateway, also saved the Abis link circuit resource simultaneously.
BTS medium surface gateway multicast:
When group calling is set up, on BTS medium surface gateway, set up the Channel Elements multicast table.BTS medium surface gateway receives the media stream message of BSC, obtain needing by queried channel unit multicast table the Channel Elements address forwarded, media stream message is transmitted to each Channel Elements, then by eating dishes without rice or wine, the forward medium stream packet is sent to each user in the PTT group by Channel Elements.
The SDU of this system, BSC medium surface gateway and BTS medium surface gateway are realized respectively three grades of multicasts:
Selection/Dispatching Unit is set up base station controller medium surface gateway multicast table thereon, the dependency basis station control medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after receiving forward media stream, search base station controller medium surface gateway multicast table, forward media stream is sent to each base station controller medium surface gateway listed in multicast table;
Base station controller medium surface gateway is set up base station transceiver medium surface gateway multicast table thereon, the base station transceiver medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives selection/Dispatching Unit, search base station transceiver medium surface gateway multicast table, forward media stream is issued to each base station transceiver medium surface gateway listed in multicast table;
Base station transceiver medium surface gateway is set up the Channel Elements multicast table thereon, the Channel Elements address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives base station controller medium surface gateway, search the Channel Elements multicast table, forward media stream is issued to each Channel Elements listed in multicast table.
The SDU of this system, BSC medium surface gateway and BTS medium surface gateway also can be added and/or deletion work multicast table:
Selection/Dispatching Unit is when having new base station controller medium surface gateway to add or leaving multicast group, and the base station controller medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station controller medium surface gateway is when having new base station transceiver medium surface gateway to add or leaving multicast group, and the base station transceiver medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station transceiver medium surface gateway is when having new Channel Elements to add or leaving multicast group, and the Channel Elements multicast table on it is carried out to multicast member to be increased or deletion action.
A kind of forward media stream transmitting system provided by the invention preferably increases multicast table on BSC medium surface gateway, BTS medium surface gateway, be used for preserving the multicast member address, so that BSC medium surface gateway, BTS medium surface gateway also possess multicast functionality, thereby realize three grades of multicasts (SDU is to BSC medium surface gateway, the three grade multicasts of BSC medium surface gateway to BTS medium surface gateway and BTS medium surface gateway to Channel Elements) function of BSS system forward Media Stream.Certainly, one-level multicast (SDU is to this one-level multicast of BSC medium surface gateway) or secondary multicast are (except SDU arrives this one-level multicast of BSC medium surface gateway, also have the multicast of BSC medium surface gateway to BTS medium surface gateway one-level) also can realize the present invention, only less better on effect.
The present invention, due to the method that adopts multistage multicast, saved between the medium surface gateway and the link circuit resource of Abis, solved the resource-constrained and BSS Capacity that causes of BSS medium surface.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the sending method of a forward media stream, is characterized in that, comprises the following steps:
When group calling is set up, set up base station controller medium surface gateway multicast table on selection/Dispatching Unit, will comprise that the dependency basis station control medium surface gateway address of group calling scheduling in-zone cell joins in multicast table; Set up base station transceiver medium surface gateway multicast table on base station controller medium surface gateway, will comprise that the base station transceiver medium surface gateway address of group calling scheduling in-zone cell joins in multicast table; Set up the Channel Elements multicast table on base station transceiver medium surface gateway, will comprise that the Channel Elements address of group calling scheduling in-zone cell joins in multicast table;
After selection/Dispatching Unit receives forward media stream, search base station controller medium surface gateway multicast table, forward media stream is sent to each base station controller medium surface gateway listed in multicast table;
After base station controller medium surface gateway receives the forward media stream of selection/Dispatching Unit, search base station transceiver medium surface gateway multicast table, forward media stream is issued to each base station transceiver medium surface gateway listed in multicast table;
After base station transceiver medium surface gateway receives the forward media stream of base station controller medium surface gateway, search the Channel Elements multicast table, forward media stream is issued to each Channel Elements listed in multicast table.
2. method according to claim 1, is characterized in that, after described Channel Elements receives the forward media stream of base station transceiver medium surface gateway, by eating dishes without rice or wine, forward media stream sent to each user in group calling.
3. method according to claim 1, is characterized in that, also comprises:
When having new base station controller medium surface gateway to add or leaving multicast group, the base station controller medium surface gateway multicast table on selection/Dispatching Unit is carried out to multicast member to be increased or deletion action.
4. method according to claim 1, is characterized in that, also comprises:
When having new base station transceiver medium surface gateway to add or leaving multicast group, the base station transceiver medium surface gateway multicast table on base station controller medium surface gateway is carried out to multicast member to be increased or deletion action.
5. method according to claim 1, is characterized in that, also comprises:
When having new Channel Elements to add or leaving multicast group, the Channel Elements multicast table on base station transceiver medium surface gateway is carried out to multicast member to be increased or deletion action.
6. according to the described method of claim 1 to 5 any one, it is characterized in that, also comprise:
When group calling discharges, delete base station controller medium surface gateway multicast table, the base station transceiver medium surface gateway multicast table on base station controller medium surface gateway and the Channel Elements multicast table on base station transceiver medium surface gateway on selection/Dispatching Unit.
7. the transmitting system of a forward media stream, comprise selection/Dispatching Unit, base station controller medium surface gateway and base station transceiver medium surface gateway, it is characterized in that:
Selection/Dispatching Unit is set up base station controller medium surface gateway multicast table thereon, the dependency basis station control medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after receiving forward media stream, search base station controller medium surface gateway multicast table, forward media stream is sent to each base station controller medium surface gateway listed in multicast table;
Base station controller medium surface gateway is set up base station transceiver medium surface gateway multicast table thereon, the base station transceiver medium surface gateway address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives selection/Dispatching Unit, search base station transceiver medium surface gateway multicast table, forward media stream is issued to each base station transceiver medium surface gateway listed in multicast table;
Base station transceiver media veil light is set up the Channel Elements multicast table thereon, the Channel Elements address that will comprise group calling scheduling in-zone cell joins in multicast table, after the forward media stream that receives base station controller medium surface gateway, search the Channel Elements multicast table, forward media stream is issued to each Channel Elements listed in multicast table.
8. according to system claimed in claim 7, it is characterized in that:
Selection/Dispatching Unit is when having new base station controller medium surface gateway to add or leaving multicast group, and the base station controller medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station controller medium surface gateway is when having new base station transceiver medium surface gateway to add or leaving multicast group, and the base station transceiver medium surface gateway multicast table on it is carried out to multicast member to be increased or deletion action;
Base station transceiver medium surface gateway is when having new Channel Elements to add or leaving multicast group, and the Channel Elements multicast table on it is carried out to multicast member to be increased or deletion action.
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| CN102883273B (en) * | 2011-07-12 | 2015-09-16 | 普天信息技术研究院有限公司 | A kind of method realizing group calling communication |
| CN109309904B (en) * | 2017-07-28 | 2021-03-23 | 华为技术有限公司 | Multicast data transmission method, related equipment and communication system |
| CN112367309B (en) * | 2020-10-27 | 2023-05-09 | Oppo广东移动通信有限公司 | Streaming media gateway dynamic networking method, device, system, terminal equipment and medium |
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| CN101001197A (en) * | 2006-12-31 | 2007-07-18 | 华为技术有限公司 | Transmission method, system and correlated equipment of media flow |
| CN101547405A (en) * | 2009-05-08 | 2009-09-30 | 北京邮电大学 | Relay multicast method and relay multicast device based on multimedia broadcast/multicast service |
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| CN101001197A (en) * | 2006-12-31 | 2007-07-18 | 华为技术有限公司 | Transmission method, system and correlated equipment of media flow |
| CN101547405A (en) * | 2009-05-08 | 2009-09-30 | 北京邮电大学 | Relay multicast method and relay multicast device based on multimedia broadcast/multicast service |
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