CN105764034A - Group calling downlink data packet transmission method and system and equipment - Google Patents
Group calling downlink data packet transmission method and system and equipment Download PDFInfo
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The invention provides a group calling downlink data packet transmission method, and aims at effectively enhancing bearer network transmission efficiency and core network performance under the scene of group calling downlink transmission so as to enhance capacity and performance of cluster services. In certain feasible embodiments of the invention, the method comprises the steps that core network equipment establishes a multicast distribution tree for a group initiating group calling when the core network equipment receives a group calling request, the core network equipment acts as a multicast source of the multicast distribution tree, and at least one base station to which multiple terminals in the group belong acts as a leaf node; the core network equipment distributes group calling downlink data packets to the at least one base station through the multicast distribution tree so that the group calling downlink data packets are enabled to be forwarded to multiple terminals by at least one base station; and the core network equipment deletes the multicast distribution tree when group calling ends.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of group and exhale downstream packet transmission method.
Background technology
Current cluster user is also more and more denseer for the interest of high-speed data service, is develop the most quickly one of group service with the high-speed data service that video traffic is representative.And pressure that high-speed data service brings to the bearer network between cluster core net and base station is increasing.
Between usual cluster core net and base station, bearer network uses traditional clean culture (point-to-point) transmission means, and core net needs each base station that participation group is exhaled individually to send a data.Refer to Fig. 1, it is that group system adopts unicast transmission mode to transmit the schematic diagram of data, the group of cluster exhales terminal C totally three users containing the terminal A of base station 1, the terminal B of base station 2, base station 3, data source (source) exhales user's (i.e. terminal A, B, C) to send the data stream of downlink data to group, wherein, core network gateway (Gateway, GW) adopts point-to-point transmission means that the data from data source are transferred to the base station that participation group is exhaled.Detailed process includes: data source source sends a unicast data to core network gateway；Core network gateway is that a data are individually replicated and sent in each base station that participation group is exhaled, and one has 3 base station participation groups exhales, and namely original a data need to be copied into 3 parts of transmissions；Each packet independently arrives each base station by IP (InternetProtocol, Internet protocol) bearer network；Base station exhales DSCH Downlink Shared Channel that data are transferred to terminal by group.
Practice finds, between cluster core net and base station, bearer network uses traditional clean culture point-to-point transmission means, owing to needing each base station exhaled for participation group individually replicate a data and be sent to base station by bearer network, thus have the drawback that 1, bearer network exists bulk redundancy flow, serious reduce bearer network efficiency of transmission；2, core network gateway needs to replicate distribution many numbers evidence, adds CPU (CentralProcessingUnit, processor) load thus reducing performance.These defects seriously reduce capacity and the performance of group service.
Summary of the invention
The embodiment of the present invention provides a kind of group to exhale downstream packet transmission method, in order to exhales under the scene of downlink transfer in group, improves bearer network efficiency of transmission and core net performance, improves capacity and the performance of group service.
First aspect present invention provides a kind of group to exhale downstream packet transmission method, including: equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the multiple terminals in described group for leaf node；Group is exhaled downlink data packet to be distributed at least one base station described through described multicast distribution tree by described equipment of the core network, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal；Described equipment of the core network, when group exhales end, deletes described multicast distribution tree.
Second aspect present invention provides a kind of group to exhale downstream packet transmission system, including: control module, for make equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the multiple terminals in described group for leaf node；Transport module, is used for making described equipment of the core network that group to be exhaled downlink data packet be distributed at least one base station described through described multicast distribution tree, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal；Described control module, is additionally operable to make described equipment of the core network when group exhales end, deletes described multicast distribution tree.
Third aspect present invention provides a kind of equipment of the core network, including: processor, memorizer, bus and communication interface；Described memorizer is used for storing program, described processor is connected by described bus with described memorizer, when described equipment of the core network runs, described processor performs the described program of described memorizer storage, so that the group that described equipment of the core network performs as described in the first aspect of the invention exhales downstream packet transmission method.
Fourth aspect present invention provides a kind of group-calling service to process system, including above-mentioned equipment of the core network, and bearer network and base station.
Therefore, in some feasible embodiments of the present invention, by receive group call for ask time, dynamically set up multicast distribution tree, group is exhaled downlink data packet be distributed to base station through described multicast distribution tree, achieve employing multicast (point-to-multipoint) transmission means between core net and base station, achieve techniques below effect:
1, by adopting multicast transmission mode, all base stations that participation group is exhaled by core net only send a data, just can realize transmitting the purpose of data for multiple base stations simultaneously, compared with the unicast transmission mode of traditional point-to-point, exhale under the scene of downlink transfer in group, it is possible to reduce redundant flow, greatly save resource, it is effectively improved bearer network efficiency of transmission and core net performance, thus improving capacity and the performance of group service；
2, by receive group call for ask time, dynamically set up multicast distribution tree, when group exhales end, immediately delete multicast distribution tree, it is possible to increase use at bearer network the group of multicast to exhale quantity, it is possible to reduce consumption to bearer network bandwidth.
Accompanying drawing explanation
In order to be illustrated more clearly that embodiment of the present invention technical scheme, the accompanying drawing used required in embodiment and description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is that group system adopts unicast transmission mode to transmit the schematic diagram of data；
Fig. 2 is configuration diagram and the multicast transmission mode schematic diagram of group system；
Fig. 3 is the schematic flow sheet that the group that the embodiment of the present invention provides exhales downstream packet transmission method；
Fig. 4 is the schematic diagram that the group under broadband cluster system exhales data pack protocol stack；
Fig. 5 is the schematic diagram of the foundation of multicast distribution tree under broadband cluster system and use procedure；
Fig. 6 is the structural representation that the group that the embodiment of the present invention provides exhales downstream packet transmission system；
Fig. 7 is the structural representation of the equipment of the core network that the embodiment of the present invention provides.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a present invention part, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, all should belong to the scope of protection of the invention.
Term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second ", " the 3rd " etc. are for distinguishing different objects, rather than are used for describing particular order.Additionally, term " including " and " having " and their any deformation, it is intended that cover non-exclusive comprising.Such as contain series of steps or the process of unit, method, system, product or equipment are not limited to step or the unit listed, but also include step or the unit do not listed alternatively, or also include other step intrinsic for these processes, method, product or equipment or unit alternatively.
Embodiment of the present invention technical scheme is applied to group system, and the framework of described group system is as in figure 2 it is shown, include core net, bearer network, base station and terminal, wherein core net is connected with multiple base stations by bearer network, and described bearer network can be specifically IP bearer network.Described group system can be broadband cluster system, such as LTE (LongTermEvolution, Long Term Evolution) broadband cluster system, it is also possible to it is arrowband group system such as PDT (ProfessionalDigtalTrunking, special digital cluster) group system.
In different group systems, core net can have different equipments of the core network.Such as, in LTE broadband cluster system, core net can include eMME (enhancedMobilityManagementEntity, enhancement mode mobile management entity), TCF (TrunkingControlFunction, clustered control functional module), eHSS (enhancedHomeSubscriberServer, enhancement mode home subscriber server), xGW (XGateway, cluster gateway), TMF (TrunkingMediaFunction, cluster media function module) five kinds of network elements, wherein xGW is core network gateway (Gateway, GW).In PDT group system, equipment of the core network can be specifically switch, switch realize the function of above-mentioned five kinds of network elements.
nullFor the problem that background section proposes，Present aspect proposes and a kind of uses multicasting technology transmission group to exhale the transmission technology scheme of downlink data packet between core net and base station on bearer network，Core concept is: group system is combined with the multicasting technology of data communication field，And consider the bearer network each level router capacity limit to multicast in real network deployment，Employing is dynamically set up mode and is set up multicast distribution tree，Namely，When terminal initiation group is exhaled，On bearer network between cluster core net and base station, belonging to terminal, group dynamically sets up multicast distribution tree，Then，The multicast distribution tree distribution group that just can use dynamically foundation exhales downlink data packet，Group is exhaled downlink data packet to be transferred to each through multicast distribution tree and is participated in base station，To reduce the redundant flow in bearer network，Improve efficiency of transmission，And，Equipment of the core network is avoided to replicate distribution many numbers evidence，Reduce the cpu load of equipment of the core network，Improve the performance of equipment of the core network，Thus improving capacity and the performance of group service.Further, when group exhales end, multicast distribution tree is immediately deleted, it is to avoid consume the bandwidth of bearer network.The group that the method can improve at bearer network use multicast exhales quantity, and minimizing group simultaneously exhales the delay that distribution brings that replicates of downlink data packet, and reduces the consumption to bearer network bandwidth.
The IP bearer network multicasting technology that the embodiment of the present invention uses, including group membership management agreement IGMPv3 (InternetGroupManagementProtocolv3, third edition IGMP) and multicast routing protocol PIM-SSM (Protocol-IndependentMulticast SourceSpecificMulticast, agreement is unrelated-specific source multicasting).IGMPv3 adds for base station to bearer network, exits multicast.PIM-SSM is source for setting up on bearer network router with equipment of the core network such as core network gateway GW, participates in the multicast distribution tree that base station is leaf node.
Refer to Fig. 3, be a kind of group of schematic flow sheet exhaling downstream packet transmission method providing of the embodiment of the present invention, the method comprises the steps that
310, equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, and described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the plurality of terminal for leaf node.
First of embodiment of the present invention method realizes process is set up multicast distribution tree on bearer network.In certain embodiments, when asking when there being terminal to call for core net initiation group in described group, described equipment of the core network is that described group sets up multicast distribution tree.Described group includes the multiple terminals in group system, it is possible to be pre-configured with and record the information of group in equipment of the core network.
In LTE broadband cluster system, group system can set up in the middle of group-calling service signaling procedure, for the group allocation bearer network multicast address that initiation group is exhaled.Concrete, terminal is called for the TCF initiation group of core net and is asked, TCF receive group call for ask after to eMME send request to invite the group's addition group belonging to this terminal to exhale, eMME notifies that core network gateway is group allocation multicast address, this multicast address is passed to the base station that participation group is exhaled by eMME, and trigger base station uses group membership management agreement IGMPv3 to add multicast to level router (router in bearer network) on it, for each group belonging to terminal, bearer network router can be set up with core network gateway for multicast source (in other words source) according to multicast routing protocol PIM-SSM, participating in base station is the multicast distribution tree of leaf node.
In PDT group system, equipment of the core network can be specifically switch, and the function of above-mentioned TCF, eMME and core network gateway is realized by this switch, and the multicast distribution tree of foundation is with this switch for multicast source.
In short, the process of setting up of multicast distribution tree may include that described equipment of the core network is that described group distributes multicast address in bearer network, described multicast address is handed down at least one base station described, trigger at least one base station described and add multicast according to described multicast address, set up with described equipment of the core network for multicast source, the multicast distribution tree being leaf node with at least one base station described.Concrete trigger process may include that triggering at least one base station described is according to described multicast address, multicast is added respectively to higher level's router solicitation in bearer network, respective, so that each level router in described bearer network is set up with described equipment of the core network for multicast source, the multicast distribution tree being leaf node with at least one base station described.
320, group is exhaled downlink data packet to be distributed at least one base station described through described multicast distribution tree by described equipment of the core network, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal.
Second of embodiment of the present invention method realizes process is use the group that the multicast distribution tree set up on bearer network transmits group to exhale downlink data packet.
Refer to the arrow shown in Fig. 2, for LTE broadband cluster system, it is shown that the multicast transmission mode of group system, detailed process includes:
1, data source (source) sends a unicast data to core network gateway.
2, a data are individually replicated and sent in each base station that the unpromising participation group of core network gateway is exhaled, but forwards these data to IP bearer network.
3, this packet arrives each base station according to multicast distribution tree in IP bearer network.
4, base station exhales DSCH Downlink Shared Channel that data are transferred to terminal by group.
Wherein, core network gateway receives the group of data source when exhaling downlink data packet, the outermost layer IP head destination address of this packet is set to bearer network multicast ip address, then as the source of multicast distribution, this multicast packets is sent to bearer network.Different from point-to-point mode of unicast, core network gateway only sends a group and exhales downlink data packet to arrive bearer network.This group, according to the multicast routing protocol PIM-SSM multicast distribution tree generated, is exhaled downlink data packet to be delivered to leaf node base station by bearer network.Base station re-uses group and exhales DSCH Downlink Shared Channel to exhale downlink data packet to pass to terminal this group.
In PDT group system, equipment of the core network can be specifically switch, and the function of above-mentioned core network gateway is realized by this switch.
In short, the process using multicast distribution tree transmission data includes:
After described group initiation group is exhaled, described equipment of the core network receive from data source, with mode of unicast send group exhale downlink data packet；Described group is exhaled the destination address of the outermost layer IP head of downlink data packet to be set to the multicast address of described group by described equipment of the core network；Group through above-mentioned setting is exhaled downlink data packet to be sent in bearer network along described multicast distribution tree by described equipment of the core network, makes described group to exhale downlink data to wrap in described bearer network and is distributed at least one base station described along described multicast distribution tree.
In the embodiment of the present invention, multicast transmission mode is adopted to avoid the redundant flow in IP bearer network, it is possible to be effectively improved bearer network efficiency of transmission and equipment of the core network performance.
330, described equipment of the core network is when group exhales end, deletes described multicast distribution tree.
The 3rd that the step of this deletion multicast distribution tree is embodiment of the present invention method realizes process.
In the embodiment of the present invention, when group-calling service terminates, equipment of the core network trigger base station exits multicast.Trigger action includes: multicast is all exited in equipment of the core network instruction at least one base station described, to complete the deletion to multicast distribution tree.Wherein, base station can use IGMPv3 agreement, sends IGMPleave (leaving) message and exits multicast to its higher level's router solicitation.Bearer network router updates multicast distribution tree according to multicast routing protocol PIM-SSM, and when multicast is exited in all participation base stations, multicast distribution tree is erased entirely.Wherein TAIs is the complex representation of TAI (TrackingAreaIdentity, tracking area identification).
Therefore, in some feasible embodiments of the present invention, by dynamically setting up multicast distribution tree, between core net and base station, adopt multicast transmission mode, achieve techniques below effect:
1, by adopting multicast transmission mode, all base stations that participation group is exhaled by core net only send a data, just can realize transmitting the purpose of data for multiple base stations simultaneously, compared with the unicast transmission mode of traditional point-to-point, exhale under the scene of downlink transfer in group, it is possible to reduce redundant flow, greatly save resource, it is effectively improved bearer network efficiency of transmission and core net performance, thus improving capacity and the performance of group service；
2, by receive group call for ask time, dynamically set up multicast distribution tree, when group exhales end, delete multicast distribution tree immediately, it is possible to increase use at bearer network the group of multicast to exhale quantity, it is possible to reduce consumption to bearer network bandwidth.
For ease of being better understood from the technical scheme that the embodiment of the present invention provides, it is that example is introduced below by the embodiment under a concrete scene.
The present embodiment is with under broadband cluster system, and it is example that group system carries out the application scenarios of group-calling service.
Refer to Fig. 4, it is shown that the group under broadband cluster system exhales data pack protocol stack, the IP bag in core network gateway and both sides, base station uses bearer network multicast address, and bearer network uses this multicast address to realize multicast functionality.Multicast address and GTP-U (GPRSTunnellingProtocolfortheuserplane, GPRS (the GeneralPacketRadioService of user level, GPRS (general packet radio service)) tunnel protocol) head TEID (TunnelEndpointID, tunnel endpoint identifier), for bearer network multicast address and the GTP-UTEID of multicast downlink bearing of core network gateway distribution.
Broadband cluster system includes terminal, base station (eNB) and bearer network (CarrierNetwork) and core net, wherein, core net includes again five network elements of eMME, TCF, eHSS, xGW, TMF, and wherein xGW is core network gateway, and bearer network includes router.
Refer to Fig. 5, be the schematic diagram of the foundation of multicast distribution tree and use procedure, detailed process comprises the steps that
1. terminal (UserEquipment) can at LTEAttach (attachment) process and SIP (SessionInitiationProtocol, session initiation protocol) after Register (registration) process, certain group's initiation group is exhaled, and transmission group is called for and is asked to TCF.TCF receives after group calls for and ask, and sends request (Invite) to eMME, to invite the terminal addition group of this group to exhale.
2.eMME sends CreateGroupBearerRequest (creating group's carrying request), and message is to xGW, to ask xGW to set up multicast downlink bearing.
3.xGW sets up multicast downlink bearing, in order to exhale in bearer network use group, for this group allocation bearer network multicast address (Multicastaddr), and distribute the GTP-UTEID of multicast downlink bearing, and multicast address and the GTP-UTEID of distribution are returned to eMME by CreateGroupResponse (creating group to respond) message.This CreateGroupResponse message can also include core network gateway address (xGWaddr).
4.eMME inspection group exhales whether the base station (eNB) under the tracking area identification list (TAIList) of UE has been added to this multicast.If base station does not also add this multicast, eMME sends InitialContextSetupRequest (initial context arranges request) message and requires that it adds multicast to base station, and this message carries Multicastaddr and GTP-UTEID and xGWaddr.
5. group's context is set up in base station, sends IGMPJoin (addition) message and shows to monitor the multicast of this multicast address to the higher level's router being positioned at bearer network.Router in bearer network receives IGMPJoin message, use PIM-SSM agreement set up with xGW be source, base station be leaf node multicast distribution tree.
6. base station returns InitialContextSetupResponse (initial context arranges response) news eMME.
7. group starts to transmit group and exhales data after exhaling foundation.Even if this group terminal is distributed under multiple different base station, xGW only need to send a group and exhale packet, it is not necessary to replicating distribution many parts, this packet arrives each base station according to multicast distribution tree, is finally delivered to terminal.As can be seen from Figure, what arrive xGW is unicast data, and xGW downlink transfer is then multicast packet.
8. when group exhales end (TCF receives group and exhales releasing request), equipment of the core network eMME notifies that multicast is exited in base station, and base station sends IGMPleave (exiting) message to level router on it to exit multicast.When multicast is all exited in all base stations, the multicast distribution tree of bearer network is erased entirely.
Above, for broadband cluster system, present example method is illustrated.What deserves to be explained is, in arrowband group system such as PDT group system, the flow process carrying out group-calling service is similar with above-mentioned flow process, and difference may is that, equipment of the core network is switch, switch perform the function of five kinds of network elements in above-mentioned broadband system.No longer describe in detail herein.
Therefore, in some embodiments of the invention, by the following technical solutions:
1, between base station and core net descending group exhale data use multicast transmission；
2, equipment of the core network such as xGW distributes the TEID of multicast address and base station side GTP-U tunnel in group call establishment process, and requires that under TAIList, base station adds multicast by eMME, it is established that combine, with TAIList, the bearer network multicast that comprised base station is region.
3, multicast distribution tree dynamically generates in group call establishment process, immediately deletes when group exhales end.By the less-restrictive of router multicast tree quantity in bearer network.
By adopting technique scheme, achieve techniques below effect:
Use mode of unicast transfer ratio relatively with tradition, it is possible to reduce IP bearer network flow, improve group call capacity, reduce core net hardware configuration, save core network construction cost；Core net can be reduced and replicate the delay that many parts of groups of distribution exhale data to bring, improve Consumer's Experience；Group call capacity can be significantly improved when not increasing system base-station capacity, improve capacity and the performance of group service.
In order to better implement the such scheme of the embodiment of the present invention, it is also provided below for coordinating the relevant apparatus implementing such scheme.
Refer to Fig. 6, the embodiment of the present invention provides a kind of group to exhale downstream packet transmission system 600, it may include:
Control module 610, for make equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, and described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the multiple terminals in described group for leaf node；
Transport module 620, is used for making described equipment of the core network that group to be exhaled downlink data packet be distributed at least one base station described through described multicast distribution tree, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal；
Described control module 610, is additionally operable to make described equipment of the core network when group exhales end, deletes described multicast distribution tree.
In certain embodiments, described control module 610 includes:
Allocation unit 6101, being used for making described equipment of the core network is that described group distributes multicast address in bearer network；
Address issues unit 6102, for described multicast address is handed down at least one base station described；
Trigger element 6103, is used for triggering at least one base station described and adds multicast according to described multicast address, it is established that described multicast distribution tree.
In certain embodiments, described trigger element 6103, specifically for triggering at least one base station described according to described multicast address, add multicast to higher level's router solicitation in bearer network, respective respectively, so that each level router in described bearer network sets up described multicast distribution tree.
In certain embodiments, described transport module 620 includes:
Receive unit 6201, for after described group initiation group is exhaled, make described equipment of the core network receive from data source, the group that sends with mode of unicast exhale downlink data packet；
Unit 6202 is set, for making described equipment of the core network exhale the destination address of outermost layer IP head of downlink data packet to be set to the multicast address of described group by described group；
Transmitting element 6203, for making described equipment of the core network exhale downlink data packet to be sent in bearer network along described multicast distribution tree the group through above-mentioned setting, make described group to exhale downlink data to wrap in described bearer network and be distributed at least one base station described along described multicast distribution tree.
In certain embodiments, described control module 610, also include:
Indicating member 6104, is used for making described equipment of the core network when group exhales end, and multicast is all exited in instruction at least one base station described, completes the deletion to described multicast distribution tree.
Being appreciated that the function of each functional module of the system of the embodiment of the present invention can implement according to the method in said method embodiment, it implements process and can refer to the associated description in said method embodiment, repeats no more herein.
Therefore, in some feasible embodiments of the present invention, by receive group call for ask time, dynamically set up multicast distribution tree, achieve employing multicast transmission mode between core net and base station, it is possible to increase use the group of multicast to exhale quantity at bearer network, it is possible to reduce the consumption to bearer network bandwidth, bearer network efficiency of transmission and core net performance can be effectively improved, thus improving capacity and the performance of group service.
Refer to Fig. 7, the embodiment of the present invention also provides for a kind of equipment of the core network 700, it may include:
Processor 701, memorizer 702, bus 703 and communication interface 704；Described memorizer 702 is used for the program that stores 705, described processor 701 is connected by described bus 703 with described memorizer 702, when described equipment of the core network 700 runs, described processor 701 performs the described program 705 of described memorizer 702 storage, so that described equipment of the core network 700 performs the group as described in foregoing embodiments and exhales downstream packet transmission method.
Described bus 703 can be industry standard architecture (IndustryStandardArchitecture, referred to as ISA) bus or external equipment interconnection (PeripheralComponent, referred to as PCI) bus or extended industry-standard architecture (ExtendedIndustryStandardArchitecture, referred to as EISA) bus etc..Described bus can be divided into one or more in address bus, data/address bus, control bus.For ease of representing, figure only represents with a thick line, it is not intended that only have one or a type of bus.
Described memorizer 702 is used for storing executable program code, and this program code includes computer-managed instruction.Described memorizer 702 can comprise high-speed RAM (RamdomAccessMemory) memorizer.Alternatively, described memorizer 702 can also also include nonvolatile memory (non-volatilememory).Such as described memorizer 702 can include disk memory.
Described processor 701 can be a central processing unit (CentralProcessingUnit, referred to as CPU), or described processor 801 can be specific integrated circuit (ApplicationSpecificIntegratedCircuit, referred to as ASIC), or described processor 701 can be arranged to implement the embodiment of the present invention one or more integrated circuits.
The equipment of the core network of the embodiment of the present invention can be such as the equipment such as core network gateway, switch.The function of each functional module of equipment of the core network can implement according to the method in said method embodiment, and it implements process and can refer to the associated description in said method embodiment, repeats no more herein.
Therefore, in some feasible embodiments of the present invention, by receive group call for ask time, dynamically set up multicast distribution tree, achieve employing multicast transmission mode between core net and base station, bearer network efficiency of transmission and core net performance can be effectively improved, thus improving capacity and the performance of group service.
The embodiment of the present invention also provides for a kind of computer-readable recording medium storing one or more program, the one or more program includes instruction, described instruction, when the equipment of the core network being included one or more processor performs, makes the group that equipment of the core network performs as described in foregoing embodiments exhale downstream packet transmission method.
Additionally, present invention also offers corresponding group-calling service to process system, including above-mentioned equipment of the core network, and bearer network and base station.Specific implementation is referred to above the corresponding of method be described.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, the part being not described in certain embodiment, it is possible to referring to the associated description of other embodiments.
It should be noted that, part or all or part of of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of each embodiment method of the present invention.And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.
The group above embodiment of the present invention provided exhales downstream packet transmission method and system and equipment to be described in detail, principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, all will change in specific embodiments and applications, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. a group exhales downstream packet transmission method, it is characterised in that including:
Equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, and described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the multiple terminals in described group for leaf node；
Group is exhaled downlink data packet to be distributed at least one base station described through described multicast distribution tree by described equipment of the core network, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal；
Described equipment of the core network, when group exhales end, deletes described multicast distribution tree.
2. method according to claim 1, it is characterised in that described equipment of the core network receives group and calls for when asking, the group exhaled for initiation group sets up multicast distribution tree and includes:
Described equipment of the core network is that described group distributes multicast address in bearer network, and described multicast address is handed down at least one base station described, triggers at least one base station described and adds multicast according to described multicast address, it is established that described multicast distribution tree.
3. method according to claim 1 and 2, it is characterised in that group is exhaled downlink data packet to be distributed at least one base station described through described multicast distribution tree to include by described equipment of the core network:
Described equipment of the core network receive from data source, with mode of unicast send group exhale downlink data packet；
Described group is exhaled the destination address of the outermost layer IP head of downlink data packet to be set to the multicast address of described group by described equipment of the core network；
Group through above-mentioned setting is exhaled downlink data packet to be sent in bearer network along described multicast distribution tree by described equipment of the core network, makes described group to exhale downlink data to wrap in described bearer network and is distributed at least one base station described along described multicast distribution tree.
4. the method stated according to claim 1 or 2, it is characterised in that described equipment of the core network, when group exhales end, is deleted described multicast distribution tree and included:
Described equipment of the core network is when group exhales end, and multicast is all exited in instruction at least one base station described, completes the deletion to described multicast distribution tree.
5. a group exhales downstream packet transmission system, it is characterised in that including:
Control module, for make equipment of the core network receive group call for ask time, the group exhaled for initiation group sets up multicast distribution tree, and described multicast distribution tree is with described equipment of the core network for multicast source, with at least one base station belonging to the multiple terminals in described group for leaf node；
Transport module, is used for making described equipment of the core network that group to be exhaled downlink data packet be distributed at least one base station described through described multicast distribution tree, makes described group to exhale downlink data to be coated at least one base station described and is transmitted to the plurality of terminal；
Described control module, is additionally operable to make described equipment of the core network when group exhales end, deletes described multicast distribution tree.
6. system according to claim 5, it is characterised in that described control module includes:
Allocation unit, being used for making described equipment of the core network is that described group distributes multicast address in bearer network；
Address issues unit, for described multicast address is handed down at least one base station described；
Trigger element, is used for triggering at least one base station described and adds multicast according to described multicast address, it is established that described multicast distribution tree.
7. the system according to claim 5 or 6, it is characterised in that described transport module includes:
Receive unit, for make described equipment of the core network receive from data source, with mode of unicast send group exhale downlink data packet；
Unit is set, for making described equipment of the core network exhale the destination address of outermost layer IP head of downlink data packet to be set to the multicast address of described group by described group；
Transmitting element, for making described equipment of the core network exhale downlink data packet to be sent in bearer network along described multicast distribution tree the group through above-mentioned setting, make described group to exhale downlink data to wrap in described bearer network and be distributed at least one base station described along described multicast distribution tree.
8. the system according to claim 5 or 6, it is characterised in that
Described control module also includes: indicating member, is used for making described equipment of the core network when group exhales end, and multicast is all exited in instruction at least one base station described, completes the deletion to described multicast distribution tree.
9. an equipment of the core network, it is characterised in that described equipment of the core network includes processor, memorizer, bus and communication interface；Described memorizer is used for storing program, described processor is connected by described bus with described memorizer, when described equipment of the core network runs, described processor performs the described program of described memorizer storage, so that the group that described equipment of the core network performs as according to any one of claim 1-4 exhales downstream packet transmission method.
10. a group-calling service processes system, it is characterised in that include equipment of the core network as described in claim 9, and bearer network and base station.
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