CN108696827A - A kind of transparent method of multicasting and equipment based on LTE - Google Patents
A kind of transparent method of multicasting and equipment based on LTE Download PDFInfo
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- CN108696827A CN108696827A CN201810780426.1A CN201810780426A CN108696827A CN 108696827 A CN108696827 A CN 108696827A CN 201810780426 A CN201810780426 A CN 201810780426A CN 108696827 A CN108696827 A CN 108696827A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- 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
Abstract
This application discloses a kind of transparent method of multicasting and system based on LTE, including:Interchanger receives the multicast message of multiple multicast sources, and the multicast ip address of the multiple multicast source is different, and within the specified range;Multicast message is distributed to the eNodeB for establishing downlink multicast channel according to multicast ip address by interchanger;ENodeB broadcasts the multicast message by the TTCH specified in BtrunC systems from eating dishes without rice or wine;Wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and receive all multicast messages, the applications client in LTE terminal handles the multicast message for wishing to receive according to multicast ip address;LTE terminal sends the message of the multicast ip address in specified range by uplink unicast tunnel, and network side transfers it to specific downlink multicast channel.Using the application transparent broadcast, multicast transmission can be provided with WiMAX application system for micro-, small-sized emergent, enterprise.
Description
Technical field
This application involves field of communication technology, more particularly to a kind of transparent method of multicasting and equipment based on LTE.
Background technology
Micro-, small-sized emergent, enterprise needs the working method of LTE similar to wlan system with WiMAX application system, can be
Terminal and network side provide transparent broadcast, multicast channel.
LTE system is as IP full wireless broadband system, and general provides unicast tunnel to terminal, in order to support broadcast or group
Business is broadcast, LTE system needs to configure multimedia broadcast multi-broadcasting business (eMBMS) characteristic of evolution.But the characteristic needs to increase newly
Multiple cell/multicast coordination entity (MCE:Multi-cell/multicast Coordination Entity), MBMS gateways
The network elements such as (MBMS-GW), broadcast/multicast service center (BM-SC), and only support broadcast of the network side to end side, and match
Excessively complexity is set, for micro-, small-sized emergent, the enterprise's WiMAX application system and discomfort formed as one or several base stations
It closes.
BtrunC systems are improved in the use for simplifying multicast, but there is still a need for tied up with group for the multicast functionality provided
It is fixed, such as group's video and group's short message etc., limit the flexibility of multicast application.
Therefore, the prior art will meet micro-, small-sized emergent, enterprise's needs of WiMAX application system, and there are following
Technical problem:
Technical problem 1:LTE network eats dishes without rice or wine to need to provide flexibly shared downlink broadcast/multicast channel.
The broadcast/group broadcast channel of eMBMS is (i.e.:Main control channel/Logical Traffic Channels (MCCH/MTCH)) generally according to business
The case where (including MCS, bandwidth, broadcast time, multicast address, TMGI) is semi-statically configured by upper-layer service platform, with list
It broadcasts channel and is located at different subframes, and issue the parameter of the channel by upper-layer service platform.
The broadcast/group broadcast channel of BtrunC systems is (i.e.:Clustered control channel/group service channel (TCCH/TTCH)), often
A TTCH logic channels correspond to group's voice or video traffic.Group's short message is carried using TCCH signaling plane logic channels.
TCCH and TTCH is multiplexed DSCH Downlink Shared Channel (DL-SCH) transmission channel.Fig. 1 gives the MAC structural representations of the end sides BtrunC
Figure;Fig. 2 gives the mapping relations figure of TCCH and TTCH downlink multicasts logic channel in BtrunC systems.
The broadcast of the existed systems such as above-mentioned eMBMS and BtrunC, multicast channel all with specific business-binding, need complexity
Configuration.
First, the protocol requirement broadcast/group broadcast logic channel of eMBMS and BtrunC systems and multicast ip address or multicast source
Binding, which increase the complexity used.
Secondly as broadcast channel bandwidth is limited, LTE network side needs each broadcast/group broadcast industry to sharing broadcast channel
Business is according to priority sent.
Finally, the demodulation ability of terminal baseband chip is limited, and the physics of multiple long data blocks can not be demodulated in same subframe
Channel, base station side need suitably schedule broadcast channel and unicast tunnel.
Technical problem 2:
LTE network needs the broadcast/group broadcast message for allowing terminal application software to send layer three on the uplink channel;And it is current
Terminal and LTE network do not support the uplink message of broadcast or multicast IP address.
Technical problem 3:
Multicast IP messages from uplink are forwarded on the shared multicast channel of downlink by LTE network needs.Due to agreement
The function, core net is not supported not to have the function currently.
Invention content
This application provides a kind of transparent method of multicasting and equipment based on LTE, with for micro-, small-sized emergent, enterprise's nothing
Line width in application system terminal and network side transparent broadcast, multicast transmission are provided.
This application discloses a kind of transparent method of multicasting based on LTE, including:
Interchanger receives the multicast message of N number of multicast source, and the multicast ip address of N number of multicast source is different, and specified
In range;N is greater than or equal to 2;
Multicast message is distributed to the base station eNodeB for establishing downlink multicast channel according to multicast ip address by interchanger;
ENodeB broadcasts the multicast message by the group service channel TTCH specified in BtrunC systems from eating dishes without rice or wine;
Wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and receives all multicasts
Message, the applications client in the LTE terminal handle the multicast message for wishing to receive according to multicast ip address;
LTE terminal sends the message of the multicast ip address in specified range by uplink unicast tunnel, and network side is by its turn
It is dealt into specific downlink multicast channel.
Preferably, this method further includes:
The multicast ip address that interchanger is added according to cable customer end with Internet Group Management Protocol IGMP, will be received from group
The message of the multicast message and/or LTE terminal transmission of broadcasting source is transmitted to corresponding wired network interface.
Preferably, multicast message is distributed to by the interchanger according to multicast ip address establishes downlink multicast channel
ENodeB includes:
Interchanger is filtered multicast message by multicast ip address, and is flowed to multicast message according to configuration parameter
Control, and by the priority of differentiated services code points DSCP or IP precedence field in message, multicast message is transmitted to and is built
The eNodeB of downlink multicast channel is found.
Preferably, multicast message is distributed in interchanger according to multicast ip address establish downlink multicast channel
Before eNodeB, including:
Core net establishes shared multicast group of the carrying corresponding to the specified TTCH according to configuration and specified eNodeB
S1-U link;
ENodeB establishes the TTCH for carrying the shared multicast group according to configuration in specified cell;
Wherein, the TTCH corresponds to fixed group of radio network temporary identifier G-RNTI and Logic Channel Identifier LCID, and
Multicast message is sent with coding strategy MCS using the specified modulation of configuration, the TTCH does not have corresponding clustered control channel
TCCH, need not send corresponding paging information on clustered paging control channel TPCCH, and eNodeB is preferably the TTCH dynamic
State dispatching downlink Physical Resource Block PRB resources, and the downlink PRB ratios used according to the TTCH in configuration control some cycles
Example, eNodeB no longer dispatch Dedicated Traffic Channel DTCH and other TTCH in the subframe for dispatching the TTCH.
Preferably, described wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and connect
All multicast messages are received, the applications client in the LTE terminal handles the multicast message for wishing to receive according to multicast ip address
Including:
The coprocessor CP of LTE terminal according to G-RNTI, LCID of the TTCH, is drilled under the control of application processor AP
Into grouping system load identification EPS-bearer ID and data radio bearer identification DRBID, the number of the TTCH is received, demodulated
Multicast message is reassembled into according to packet, and by data packet;
If AP is provided with to CP subscribes to multicast IP address range, CP sends the message of the AP multicast ip address subscribed to
To AP, wherein filter out the message that source address is this LTE terminal address, other messages then abandon, if AP is not arranged to CP
Multicast IP address range is subscribed to all to issue after the multicast message received is filtered out the message that source address is this LTE terminal address by CP
AP;
Application on AP selects the message of interested multicast IP to be handled, and abandons remaining multicast message.
Preferably, the LTE terminal sends the message packet of the multicast ip address in specified range by uplink unicast tunnel
It includes:
The AP of LTE terminal, which is CP configurations, allows the multicast ip address range sent;
The CP of LTE terminal modifies to uplink message strobe utility, allows to destination address in the multicast ip address
Message in range is filtered and forwards;
LTE terminal sends the uplink multicast message within the scope of the multicast ip address by default bearing.
Preferably, this method further includes:
When LTE terminal wishes to send multi-cast business data to the whole network, CP is controlled by AP and is first initiated and multicast service QoS
Dedicated bearer corresponding with bandwidth establishes request, then specifies the TFT of corresponding multicast ip address or address range;
Core net identifies that the multicast ip address in the multicast address range of its configuration, then establishes dedicated bearer for it;
The CP of terminal by the dedicated bearer is sent to core net after identifying the multicast message from AP by TFT.
Preferably, the LTE terminal sends the message packet of the multicast ip address in specified range by uplink unicast tunnel
It includes:
Uplink multicast generalized routing protocol encapsulation gre tunneling is established between LTE terminal and packet data gateway PGW, by institute
The message for stating the multicast ip address in specified range is encapsulated in gre tunneling and sends.
Disclosed herein as well is a kind of transparent multi-cast system based on LTE, including:
Interchanger receives the multicast message of N number of multicast source, and the multicast ip address of N number of multicast source is different, and specified
In range;N is greater than or equal to 2;
Multicast message is distributed to the base station eNodeB for establishing downlink multicast channel according to multicast ip address by interchanger;
ENodeB broadcasts the multicast message by the group service channel TTCH specified in BtrunC systems from eating dishes without rice or wine;
Wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and receives all multicasts
Message, the applications client in the LTE terminal handle the multicast message for wishing to receive according to multicast ip address;
LTE terminal sends the message of the multicast ip address in specified range by uplink unicast tunnel, and network side is by its turn
It is dealt into specific downlink multicast channel.
Preferably, the multicast ip address that interchanger is added also according to cable customer end with IGMP, it will be received from multicast source
The message that multicast message and/or LTE terminal are sent is transmitted to corresponding wired network interface.
As seen from the above technical solution, the application is realized using the downlink multicast channel of BtrunC to upper layer application system
Transparent LTE multicast transmissions enable adaptation to micro-, small-sized emergent, enterprise's WiMAX application system demand, are above-mentioned
Terminal and network side in system provide transparent broadcast, multicast transmission.
Description of the drawings
Fig. 1 is the sides BtrunC UE MAC structural schematic diagrams;
Fig. 2 is the mapping relations figure of TCCH and TTCH downlink multicast logic channels in BtrunC systems;
Fig. 3 is transparent multi-cast system schematic diagram of the application based on LTE.
Specific implementation mode
To make the object, technical solution and advantage of the application be more clearly understood, develop simultaneously embodiment referring to the drawings, right
The application is described in further detail.
The present invention realizes the LTE to upper layer application system transparent as shown in Figure 3 using the downlink multicast channel of BtrunC
Multicast transmission.Fig. 3 is transparent multi-cast system schematic diagram of the application based on LTE, and the LTE multicast transmission systems are by the network equipment
(including:Core net (EPC), base station (eNB) and interchanger) and LTE terminal equipment composition, it is realized according to following flow transparent
LTE multicast transmissions:
1. network side receives the group from multiple multicast sources (as shown in the figure multicast source 1, multicast source 2) from network interface and reports
The multicast ip address (multicast IP1, multicast IP2 as shown in the figure) of text, these multicast sources is different, and within the specified range.
Designated multicast IP address is added to interchanger with Internet Group Management Protocol (IGMP) according to configuration parameter in core net
Multicast group in range, in this way, only message of the multicast ip address in the address range can be just forwarded by the switch.According to
IGMP agreements are needed through IGMP agreements if the equipment for being connected to interchanger will receive the message of some multicast to interchanger
The multicast is subscribed to, and different multicasts is distinguished by multicast ip address.Interchanger presses destination address to multicast message
(multicast ip address) is filtered, and carries out flow control to multicast message according to configuration parameter, and by the differential service in message
Code point (DSCP, Differentiated Services Code Point) or IP precedence (IP Precedence) field
Priority forward the message to the eNodeB for establishing downlink multicast channel.
2. multicast message is distributed to the wired network interface for having subscribed multicast IP by network side.
The multicast ip address that the interchanger of network side is added according to cable customer end with IGMP agreements forwards corresponding multicast
Message gives corresponding wired network interface.
3. multicast message is distributed to each eNodeB for establishing downlink multicast channel by network side, passed through by eNodeB
Specified TTCH channels defined in BtrunC agreements broadcast these multicast messages from eating dishes without rice or wine.
Core net establishes the specific shared multicast group that carrying corresponds to the specified TTCH according to configuration and specified eNodeB
The link of the S1-U of group, eNodeB establish the TTCH of the carrying shared multicast group according to configuration in specified cell, this
Channel corresponds to fixed group of radio network temporary identifier (G-RNTI) and Logic Channel Identifier (LCID), and specified using configuration
MCS sends multicast message.
Therefore TTCH is hereinafter also known as shared group by the TTCH established as the shared multicast channel of multicast group
Broadcast channel.The special TTCH does not have corresponding TCCH, in clustered paging control channel (TPCCH, Trunking Paging
Control Channel) on need not also send corresponding paging (paging) information.ENodeB is preferably that TTCH dynamics are adjusted
Spend downlink physical resource block (PRB) resource, and the downlink PRB ratio (examples used according to the TTCH in configuration control some cycles
Such as it is no more than 60%), avoids causing congestion in short-term to unicast, influence the time delay of unicast.Due to the solution of many terminal baseband chips
Tune ability is limited, and the physical channel of multiple long data blocks can not be demodulated in same subframe, and eNodeB is dispatching the special TTCH's
Dedicated Traffic Channel (DTCH) and other TTCH channels are no longer dispatched in subframe.
4. wishing that the LTE terminal for receiving multicast message receives the specified TTCH channels in serving cell, and receive all
Multicast message.The message of the multicast IP received is wished in applications client processing in terminal.
LTE terminal learns that information in need is shared and sent on multicast channel at this by unicast and upper layer application, starts
Actively receive the specific TTCH channels.Coprocessor (CP) module of LTE terminal is opened under the control of application processor (AP)
Begin to receive and shares multicast channel.CP is according to the specific G-RNTI, LCID of the TTCH, evolved packet system load identification (EPS-
Bearer ID), Data Radio Bearer mark (DRBID), receive, demodulate the data packet of the TTCH, and in groups by data packet recombination
IP packet is broadcast, if AP is provided with to CP subscribes to multicast address range, CP sends the message of the AP multicast ip address subscribed to
AP (filtering out the message that source address is this terminal address) is given, it is other then abandon, if be not provided with, multicast message that CP will be received
(filtering out the message that source address is this terminal address) is all sent to AP, and the application on AP selects the message of interested multicast IP to carry out
Processing, remaining discarding.
5.LTE terminals send the message of the multicast ip address in specified range by uplink unicast tunnel.Network side is by group
It reports text and is sent to the wired network interface for having subscribed the multicast ip address, and transfer it to specific downlink multicast channel.
In order to support to send using multicast ip address as the uplink message of purpose address, the CP modules of LTE terminal are needed to upper
Row packet filtering mechanism do it is suitably modified, allow to destination address be multicast ip address message be filtered and forward.LTE is whole
The AP at end, which is CP configurations, allows the multicast ip address range sent, such terminal that can be sent simply by default bearing specified
Uplink multicast message in address range.
When LTE terminal wishes to send multi-cast business data to the whole network, CP can also be controlled by AP and first be initiated and multicast
QoS of survice and the corresponding dedicated bearer of bandwidth establish request, then specify the TFT of corresponding multicast ip address or address range
(Traffic Flow Template, traffic flow template).Core net identifies the multicast address model that the multicast ip address is configured at it
In enclosing, then dedicated bearer is established for it.The CP of terminal is sent out after identifying the multicast message from AP by TFT by the dedicated bearer
It is sent to core net.Core net in addition to being sent to interchanger, is distributed the multicast message in dedicated bearer or default bearing by interchanger
To the network interface for subscribing to the multicast, also downlink is sent to according to step 3 together with the multicast message that other wired network interfaces are sent and shares multicast
The carrying of channel is handled.Interchanger needs the multicast message for forbidding the port connected from core net to send to be forwarded back to the end again
Mouthful.
Another processing method is:The general routing association of uplink multicast is established between LTE terminal and packet data gateway (PGW)
View encapsulation tunnel (GRE), multicast IP messages are encapsulated in gre tunneling and are sent, PGW takes out multicast message in gre tunneling
Afterwards, it is handled according to method similar to the above.
The application above-mentioned technical proposal is illustrated below by a preferred embodiment.
For the integrated small station system (EPC, eNodeB are integrated within one device) of Emergency use, there is usually one small
Area, more than ten of handheld terminal, several cable customer ends.
By the configuration management function in small station, configure permission multicast ip address range (such as 224.0.1.0~
224.0.1.100), the MCS (such as MCS=5) of multicast service, maximum rate (5Mbps), downlink RB use measurement period (example
Such as 100ms) and maximum ratio (60%).
Core net module in small station, which is instructed using the report of IGMP agreements to switch module, is added all permissions
The multicast of multicast ip address.
Shared multicast channel TTCH uses parameter configuration as shown in Table 1:
Table 1
The corresponding G-RNTI of the TTCH can use FFF3.
When handheld terminal opens multicast service, the pre-established uplink dedicated bearer QCI=5 of CP, the multicast for applying signaling,
The destination address of TFT is set as the IP address of signaling multicast, establishes uplink dedicated bearer QCI=1, GBR=32Kbps, TFT's
Destination address is provided for the IP ranges of voice multicast, establishes the mesh of uplink dedicated bearer QCI=4, GBR=1Mbps, TFT
Address be provided for the IP ranges of business multicast.
The acentric communications applications softwares such as handheld terminal Serval Mesh similar with configuration on cable customer end are held
Terminal periodic by the IP packet that application signaling multicast ip address is purpose address and DSCP=1 notice oneself in net state
(including the ID of oneself and interested group), other-end notifies CP to receive the message of the multicast ip address, root when needed
Local address table is generated or updated according to the ID number in the source IP address and message of message.It can be carried out a little pair according to the address table
The communication of point.Cable customer end is linked together by the switch module of cable and integrated small station system, and is assisted by IGMP
Discuss the multicast that signaling multicast ip address is added to switch module.
In terminal application software different multicast ip address (and one is corresponded to by being pre-configured some fixed service groups
A group ID), and configure the ID of the member terminal in group.Terminal in order to initiate group service, such as the group of file send,
Voice group call service or video group are exhaled, and each online group member of unicast notice can be first passed through:The group ID or IP of initiation
Location and port numbers and time started (or immediately beginning to), then at the beginning of specified (or immediately beginning to) with the group
Multicast ip address be purpose address, send service message.The group member handheld terminal being notified can be opened in specified
Time (or immediately beginning to) notice CP begin by downlink broadcast channel reception multicast message, and the message of multicast ip address will be corresponded to
It is sent to AP processing.Corresponding multicast can be added to switch module by IGMP agreements in the cable customer end being notified
The multicast of IP address.When multicast service terminates or upper layer application decides not to receive the multicast content, led to by the AP of handheld terminal
Know that CP no longer receives the message of the multicast ip address, by cable customer end by the IGMP notice of settlement switch module port from
Open the multicast.
The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.
Claims (10)
1. a kind of transparent method of multicasting based on LTE, which is characterized in that including:
Interchanger receives the multicast message of N number of multicast source, and the multicast ip address of N number of multicast source is different, and in specified range
It is interior;N is greater than or equal to 2;
Multicast message is distributed to the base station eNodeB for establishing downlink multicast channel according to multicast ip address by interchanger;
ENodeB broadcasts the multicast message by the group service channel TTCH specified in BtrunC systems from eating dishes without rice or wine;
Wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and receive all multicast messages,
Applications client in the LTE terminal handles the multicast message for wishing to receive according to multicast ip address;
LTE terminal sends the message of the multicast ip address in specified range by uplink unicast tunnel, and network side transfers it to
Specific downlink multicast channel.
2. according to the method described in claim 1, it is characterized in that, this method further includes:
The multicast ip address that interchanger is added according to cable customer end with Internet Group Management Protocol IGMP, will be received from multicast source
Multicast message and/or LTE terminal send message be transmitted to corresponding wired network interface.
3. according to the method described in claim 1, it is characterized in that, the interchanger divides multicast message according to multicast ip address
It is dealt into and establishes the eNodeB of downlink multicast channel and include:
Interchanger is filtered multicast message by multicast ip address, and carries out flow control to multicast message according to configuration parameter, with
And the priority by differentiated services code points DSCP or IP precedence field in message, multicast message is transmitted to and is established down
The eNodeB of row multicast channel.
4. method according to any one of claims 1 to 3, which is characterized in that in interchanger according to multicast ip address by group
Text is reported to be distributed to before the eNodeB for establishing downlink multicast channel, including:
Core net establishes S1- of the carrying corresponding to the shared multicast group of the specified TTCH according to configuration and specified eNodeB
The link of U;
ENodeB establishes the TTCH for carrying the shared multicast group according to configuration in specified cell;
Wherein, the TTCH corresponds to fixed group of radio network temporary identifier G-RNTI and Logic Channel Identifier LCID, and uses
The specified modulation of configuration sends multicast message with coding strategy MCS, and the TTCH does not have corresponding clustered control channel TCCH,
Corresponding paging information need not be sent on clustered paging control channel TPCCH, eNodeB is preferably the TTCH dynamic dispatchings
Downlink physical resource block PRB resources, and the downlink PRB ratios used according to the TTCH in configuration control some cycles,
ENodeB no longer dispatches Dedicated Traffic Channel DTCH and other TTCH in the subframe for dispatching the TTCH.
5. method according to any one of claims 1 to 3, which is characterized in that described to wish that the LTE for receiving multicast message is whole
End receives the specified TTCH in serving cell, and receives all multicast messages, the applications client root in the LTE terminal
It is handled according to multicast ip address and wishes that the multicast message received includes:
The coprocessor CP of LTE terminal is under the control of application processor AP, according to G-RNTI, LCID of the TTCH, evolution point
Group system load identification EPS-bearer ID and data radio bearer identification DRBID, receive, demodulate the data packet of the TTCH,
And data packet is reassembled into multicast message;
If AP is provided with to CP and subscribes to multicast IP address range, the message of the AP multicast ip address subscribed to is sent to by CP
AP, wherein filter out the message that source address is this LTE terminal address, other messages then abandon, if AP is not ordered to CP settings
Multicast ip address range is read all to issue after the multicast message received is filtered out the message that source address is this LTE terminal address by CP
AP;
Application on AP selects the message of interested multicast IP to be handled, and abandons remaining multicast message.
6. method according to any one of claims 1 to 3, which is characterized in that the LTE terminal passes through uplink unicast tunnel
The message of multicast ip address sent in specified range includes:
The AP of LTE terminal, which is CP configurations, allows the multicast ip address range sent;
The CP of LTE terminal modifies to uplink message strobe utility, allows to destination address in the multicast ip address range
Interior message is filtered and forwards;
LTE terminal sends the uplink multicast message within the scope of the multicast ip address by default bearing.
7. according to the method described in claim 6, it is characterized in that, this method further includes:
When LTE terminal wishes to send multi-cast business data to the whole network, CP is controlled by AP and is first initiated and multicast service QoS and band
The corresponding dedicated bearer of width establishes request, then specifies the TFT of corresponding multicast ip address or address range;
Core net identifies that the multicast ip address in the multicast address range of its configuration, then establishes dedicated bearer for it;
The CP of terminal by the dedicated bearer is sent to core net after identifying the multicast message from AP by TFT.
8. method according to any one of claims 1 to 3, which is characterized in that the LTE terminal passes through uplink unicast tunnel
The message of multicast ip address sent in specified range includes:
Uplink multicast generalized routing protocol encapsulation gre tunneling is established between LTE terminal and packet data gateway PGW, by the finger
The message for determining the multicast ip address in range is encapsulated in gre tunneling and sends.
9. a kind of transparent multi-cast system based on LTE, which is characterized in that including:
Interchanger receives the multicast message of N number of multicast source, and the multicast ip address of N number of multicast source is different, and in specified range
It is interior;N is greater than or equal to 2;
Multicast message is distributed to the base station eNodeB for establishing downlink multicast channel according to multicast ip address by interchanger;
ENodeB broadcasts the multicast message by the group service channel TTCH specified in BtrunC systems from eating dishes without rice or wine;
Wish that the LTE terminal for receiving multicast message receives the specified TTCH in serving cell, and receive all multicast messages,
Applications client in the LTE terminal handles the multicast message for wishing to receive according to multicast ip address;
LTE terminal sends the message of the multicast ip address in specified range by uplink unicast tunnel, and network side transfers it to
Specific downlink multicast channel.
10. system according to claim 9, it is characterised in that:
The multicast ip address that interchanger is added also according to cable customer end with IGMP, by received from multicast source multicast message and/
Or the message that LTE terminal is sent is transmitted to corresponding wired network interface.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020210930A1 (en) * | 2019-04-15 | 2020-10-22 | 海能达通信股份有限公司 | Trunked communication-based multicast service execution method, and related apparatus |
| CN111836205A (en) * | 2019-04-15 | 2020-10-27 | 海能达通信股份有限公司 | Multicast service implementation method based on cluster communication and related equipment |
| CN112954610A (en) * | 2019-11-22 | 2021-06-11 | 成都鼎桥通信技术有限公司 | Group signaling transmission method and device |
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