CN107094117A - Subway PIS business multi-cast system and method based on LTE - Google Patents
Subway PIS business multi-cast system and method based on LTE Download PDFInfo
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- CN107094117A CN107094117A CN201610091431.2A CN201610091431A CN107094117A CN 107094117 A CN107094117 A CN 107094117A CN 201610091431 A CN201610091431 A CN 201610091431A CN 107094117 A CN107094117 A CN 107094117A
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- vehicle mounted
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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
- H04L45/16—Multipoint routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of subway PIS business multi-cast system based on LTE and method, it is related to communication technical field, the present invention is by increasing source Vehicle mounted station, sound cross network transmission tunnel is equipped between source Vehicle mounted station and each purpose Vehicle mounted station, the source Vehicle mounted station is replicated to multicast packet, and the multicast packet after duplication is sequentially passed through into the core net EPC by the sound cross network transmission tunnel and base station is transmitted to each purpose Vehicle mounted station, purpose Vehicle mounted station obtains the multicast packet, to realize the multicast of subway PIS business, it is achieved thereby that in the case where core net EPC and base station do not support multicast functionality, also the multicast of subway PIS business can be realized, reduce the expense and cost of system.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of subway PIS business multi-cast system and side based on LTE
Method.
Background technology
Passenger information system (Passenger Information System, PIS), is for passenger to provide all kinds of in subway
The service system of information.Passenger information system relies on multimedia network technology, using computer system as core, is shown eventually with station
End and vehicle-mounted display terminal provide information service for medium to passenger.
Subway wireless communication technology based on LTE, at present using the transmission of multicasting technology progress PIS business, reference picture 1,
PIS servers can send multicast packet, described group to core network packet core evolution (Evolved Packet Core, EPC)
Destination address in unicast packets be multicast ip address (for example：225.1.1.40), multicast distribution is carried out to each by core net EPC
The Vehicle mounted station (Train Access Unit, TAU) of train, at this time, it may be necessary to which multicast functionality is supported in core net EPC and base station.Some
Multicast functionality is not supported in core net EPC and base station, and now core net EPC can directly abandon multicast packet, and support multicast work(
The core net EPC of energy and base station need individually exploitation multicast protocol, safeguard multicast relations, add the expense and cost of system.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State a kind of the subway PIS business multi-cast system and method based on LTE of problem.
According to one aspect of the present invention, there is provided a kind of subway PIS business multi-cast systems based on LTE, the system
Including：PIS servers, source Vehicle mounted station, core net EPC, base station and at least one the purpose Vehicle mounted station being sequentially connected, the source car
Sound cross network transmission tunnel is equipped between microscope carrier and each purpose Vehicle mounted station；
The PIS servers, for the multicast packet including PIS business datums to be sent to the source Vehicle mounted station；
The source Vehicle mounted station, for being replicated to the multicast packet, and the multicast packet after duplication is passed through
The sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
The purpose Vehicle mounted station, for obtaining the multicast packet, to realize the multicast of subway PIS business.
Alternatively, the sound cross network transmission tunnel is gre tunneling.
Alternatively, the source Vehicle mounted station, is further used for the multicast packet after duplication carrying out GRE encapsulation, and by GRE
Packet after encapsulation sequentially passes through the core net EPC by the sound cross network transmission tunnel and base station is transmitted to each purpose car
Microscope carrier；
Correspondingly, the purpose Vehicle mounted station, the packet for being further used for receiving is decapsulated, described to obtain
Multicast packet.
Alternatively, the source Vehicle mounted station, the multicast packet being further used for after replication wraps encapsulation GRE and including mesh
Vehicle mounted station IP address new IP headers, GRE will be encapsulated with the packets of new IP headers according to the purpose Vehicle mounted station
IP address sequentially passes through the core net EPC by the sound cross network transmission tunnel and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station, the GRE heads and new IP headers being further used in the packet that will receive is shelled
Fall, to obtain the multicast packet.
Alternatively, also include in the multicast packet：Multicast ip address；
The purpose Vehicle mounted station, is additionally operable to after the multicast packet is obtained, the multicast packet is sent to respectively
Individual PIS receiving terminals corresponding with the multicast ip address, so as to receive the PIS receiving terminals of the multicast packet to institute
PIS business datums are stated to be shown.
According to another aspect of the present invention, there is provided a kind of subway PIS business based on LTE using described system
Method of multicasting, methods described includes：
PIS servers send the multicast packet including PIS business datums to source Vehicle mounted station；
The source Vehicle mounted station is replicated to the multicast packet, and the multicast packet after duplication is passed by inter-network
Defeated tunnel sequentially passes through core net EPC and base station is transmitted to each purpose Vehicle mounted station；
The purpose Vehicle mounted station obtains the multicast packet, to realize the multicast of subway PIS business.
Alternatively, the sound cross network transmission tunnel is gre tunneling.
Alternatively, the multicast packet after duplication is sequentially passed through core net by the source Vehicle mounted station by sound cross network transmission tunnel
EPC and base station are transmitted to each purpose Vehicle mounted station, are further comprised：
Multicast packet after duplication is carried out GRE encapsulation by the source Vehicle mounted station, and the packet after GRE is encapsulated passes through
The sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station obtains the multicast packet, further comprises：
The purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet.
Alternatively, the multicast packet after duplication is carried out GRE encapsulation, and the number after GRE is encapsulated by the source Vehicle mounted station
The core net EPC is sequentially passed through by the sound cross network transmission tunnel according to bag and base station is transmitted to each purpose Vehicle mounted station, enters one
Step includes：
The multicast packet of the source Vehicle mounted station after replication wraps encapsulation GRE and the IP address including purpose Vehicle mounted station
New IP headers, the inter-network is passed through by the packet of encapsulation GRE and new IP headers according to the IP address of the purpose Vehicle mounted station
Transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet,
Further comprise：
The purpose Vehicle mounted station peels the GRE heads in the packet received and new IP headers off, to obtain the multicast
Packet.
Alternatively, also include in the multicast packet：Multicast ip address；
The purpose Vehicle mounted station is obtained after the multicast packet, and methods described also includes：
The purpose Vehicle mounted station after the multicast packet is obtained, by the multicast packet be sent to each with it is described
The corresponding PIS receiving terminals of multicast ip address, so as to receive the PIS receiving terminals of the multicast packet to the PIS industry
Business data are shown.
The present invention is equipped with sound cross network transmission tunnel by increasing source Vehicle mounted station between source Vehicle mounted station and each purpose Vehicle mounted station
Road, the source Vehicle mounted station is replicated to multicast packet, and the multicast packet after duplication is passed through into the sound cross network transmission tunnel
Road sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station, and purpose Vehicle mounted station obtains the multicast packet
Bag, to realize the multicast of subway PIS business, it is achieved thereby that in the case where core net EPC and base station do not support multicast functionality,
Also the multicast of subway PIS business can be realized, the expense and cost of system is reduced.
Brief description of the drawings
Fig. 1 is the structural representation of the subway PIS business multi-cast systems of prior art；
Fig. 2 is the structural representation of the subway PIS business multi-cast systems based on LTE of one embodiment of the present invention；
Fig. 3 is the structural representation of the subway PIS business multi-cast systems based on LTE of one embodiment of the present invention；
Fig. 4 is GRE encapsulation schematic diagrams；
Fig. 5 is the schematic diagram that gre tunneling is set up between source Vehicle mounted station and purpose Vehicle mounted station；
Fig. 6 is the flow chart of the subway PIS business method of multicasting based on LTE of one embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Fig. 2 is the structured flowchart of the subway PIS business multi-cast systems based on LTE of one embodiment of the present invention；Reference
Fig. 2, the system includes：PIS servers, source Vehicle mounted station, core net EPC, base station and at least one the purpose car being sequentially connected
Microscope carrier, sound cross network transmission tunnel is equipped between the source Vehicle mounted station and each purpose Vehicle mounted station；
The PIS servers, for the multicast packet including PIS business datums to be sent to the source Vehicle mounted station；
It will be appreciated that the PIS business datums are usually video data, certainly, it is also possible to including other data, example
Such as, voice data etc., present embodiment is not any limitation as to this.
The source Vehicle mounted station, for being replicated to the multicast packet, and the multicast packet after duplication is passed through
The sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
For ease of data transfer, interchanger is provided between the source Vehicle mounted station and core net EPC.
It should be noted that because PIS servers generally just send a multicast packet to the source Vehicle mounted station, but mesh
Vehicle mounted station be at least one, so there is a situation where more than one, now, the source Vehicle mounted station is needed first to the multicast number
Replicated according to bag, to obtain identical with purpose Vehicle mounted station quantity and one-to-one multicast packet.
Certainly, if in the case that the purpose Vehicle mounted station is one, the source Vehicle mounted station is then without to the multicast packet
Bag is replicated.
The purpose Vehicle mounted station, for obtaining the multicast packet, to realize the multicast of subway PIS business.
In the specific implementation, in order to prevent purpose Vehicle mounted station damage, so, a purpose Vehicle mounted station can also additionally set one
Individual standby purpose Vehicle mounted station.
Present embodiment is equipped with inter-network biography by increasing source Vehicle mounted station between source Vehicle mounted station and each purpose Vehicle mounted station
Defeated tunnel, the source Vehicle mounted station is replicated to multicast packet, and the multicast packet after duplication is passed by the inter-network
Defeated tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station, and purpose Vehicle mounted station obtains the multicast
Packet, to realize the multicast of subway PIS business, it is achieved thereby that not supporting the feelings of multicast functionality in core net EPC and base station
Under condition, the multicast of subway PIS business can be also realized, the expense and cost of system is reduced.
Fig. 3 is the structured flowchart of the subway PIS business multi-cast systems based on LTE of one embodiment of the present invention；Reference
Fig. 3, the system includes：PIS servers, source Vehicle mounted station, core net EPC, base station and at least one the purpose car being sequentially connected
Microscope carrier, is equipped with generalized routing protocol encapsulation (GRE) tunnel between the source Vehicle mounted station and each purpose Vehicle mounted station；
It should be understood that because GRE protocol is a kind of tunneling, it provides a kind of a kind of message by agreement and encapsulated
Mechanism in another protocol massages, enables message to be transmitted in heterogeneous network.Gre tunneling is mainly used in source point and terminal
Between a point-to-point virtual link tunnel being formed, i.e. gre tunneling only one of which source address and a whole address.
So, in the present embodiment, the sound cross network transmission tunnel uses gre tunneling, certainly, can also use other inter-networks
Tunnel is transmitted, present embodiment is not any limitation as to this.
The PIS servers, for the multicast packet including PIS business datums to be sent to the source Vehicle mounted station；
The source Vehicle mounted station, is carried out for being replicated to the multicast packet, and by the multicast packet after duplication
GRE is encapsulated, and the packet after GRE is encapsulated the core net EPC sequentially passed through by the gre tunneling and base station transmit to
Each purpose Vehicle mounted station；
It will be appreciated that when carrying out GRE encapsulation to multicast packet, reference picture 4, it usually needs wrapped in multicast packet
Encapsulation GRE and the new IP headers of the IP address including purpose Vehicle mounted station, so, in present embodiment, the source Vehicle mounted station enters
The multicast packet that one step is used for after replication wraps the new IP headers of encapsulation GRE and the IP address including purpose Vehicle mounted station, will
Encapsulation GRE and the packets of new IP headers according to the IP address of the purpose Vehicle mounted station by the sound cross network transmission tunnel successively
Transmitted by the core net EPC and base station to each purpose Vehicle mounted station；
Wherein, the form for encapsulating the multicast packet of GRE and new IP headers is as follows：
| New IP headers |
| GRE heads |
| Payload |
GRE encapsulation process is as follows：
1st, tunnel virtual interfaces are created, the message that needs seal up dress is forwarded by the interface of gre tunneling；
2nd, when message needs to handle via the interface of gre tunneling, IP layers of output function calls tunnel virtual interfaces
Output function carry out plus encapsulation process, carry out IP forwardings again after adding encapsulation process to terminate；
The purpose Vehicle mounted station, for the packet received to be decapsulated, to obtain the multicast packet.
Accordingly, due to multicast packet carry out GRE encapsulation when, multicast packet wrap encapsulation GRE and including
The new IP headers of the IP address of purpose Vehicle mounted station, so, in present embodiment, the purpose Vehicle mounted station is further used for connecing
GRE heads and new IP headers in the packet received are peeled off, to obtain the multicast packet.
It should be noted that in order that PIS receiving terminals can be shown to PIS business datums, in present embodiment,
Also include in the multicast packet：Multicast ip address；
The purpose Vehicle mounted station, is additionally operable to after the multicast packet is obtained, the multicast packet is sent to respectively
Individual PIS receiving terminals corresponding with the multicast ip address, so as to receive the PIS receiving terminals of the multicast packet to institute
PIS business datums are stated to be shown.
For ease of data transfer, the purpose Vehicle mounted station and it is mounted between the PIS receiving terminals of the purpose Vehicle mounted station
Provided with vehicle-mounted interchanger.
In the specific implementation, PIS receiving terminals corresponding with the multicast ip address can be regarded as：Belong to the multicast IP
The PIS receiving terminals of address, it is, adding the PIS receiving terminals of multicast group in PIS servers.
Wherein, decapsulation process is as follows：
When purpose Vehicle mounted station receives GRE messages (i.e. packet after GRE encapsulation), the protocol number in new IP headers is
Preset value is (for example：47) GRE decapsulation, is then called to handle function, by data message feeding IP inputs after the completion of GRE decapsulations
Queue.
Decapsulation process and the process of dress is sealed up on the contrary, the IP messages received from Tunnel interfaces, by checking destination
Location, when discovery purpose IP address is exactly the IP address of this purpose Vehicle mounted station, peels IP headers off, then carry out GRE protocol processing (inspection
Key, the sequence number for checking verification and/or message etc.) after, peel GRE headers off.
The method that gre tunneling is set up between source Vehicle mounted station and purpose Vehicle mounted station can refer to Fig. 5, it is assumed that the IP of source Vehicle mounted station
Address is 20.70.20.210, and interface virtual IP address is 172.16.0.2；The IP address of purpose Vehicle mounted station is
171.16.13.50, interface virtual IP address is 172.16.0.11；
Then can be in source Vehicle mounted station configuring GRE tunnel：Tunnel purpose IP is 171.16.13.50, and interface virtual IP address is
172.16.0.2；In purpose Vehicle mounted station configuring GRE tunnel：Tunnel purpose IP address is 20.70.20.210, interface virtual IP
Location is 172.16.0.11.
Fig. 6 is the flow chart of the subway PIS business method of multicasting based on LTE of one embodiment of the present invention；Reference picture
6, methods described includes：
S601：PIS servers send the multicast packet including PIS business datums to source Vehicle mounted station；
S602：The source Vehicle mounted station is replicated to the multicast packet, and the multicast packet after duplication is passed through
Sound cross network transmission tunnel sequentially passes through core net EPC and base station is transmitted to each purpose Vehicle mounted station；
S603：The purpose Vehicle mounted station obtains the multicast packet, to realize the multicast of subway PIS business.
In a kind of optional embodiment of the present invention, the sound cross network transmission tunnel is gre tunneling.
In a kind of optional embodiment of the present invention, the multicast packet after duplication is passed through inter-network by the source Vehicle mounted station
Transmission tunnel sequentially passes through core net EPC and base station is transmitted to each purpose Vehicle mounted station, further comprises：
Multicast packet after duplication is carried out GRE encapsulation by the source Vehicle mounted station, and the packet after GRE is encapsulated passes through
The sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station obtains the multicast packet, further comprises：
The purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet.
In a kind of optional embodiment of the present invention, the multicast packet after duplication is carried out GRE by the source Vehicle mounted station
Encapsulation, and packet after GRE is encapsulated sequentially passes through the core net EPC by the sound cross network transmission tunnel and base station is transmitted
To each purpose Vehicle mounted station, further comprise：
The multicast packet of the source Vehicle mounted station after replication wraps encapsulation GRE and the IP address including purpose Vehicle mounted station
New IP headers, the inter-network is passed through by the packet of encapsulation GRE and new IP headers according to the IP address of the purpose Vehicle mounted station
Transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet,
Further comprise：
The purpose Vehicle mounted station peels the GRE heads in the packet received and new IP headers off, to obtain the multicast
Packet.
In a kind of optional embodiment of the present invention, also include in the multicast packet：Multicast ip address；
The purpose Vehicle mounted station is obtained after the multicast packet, and methods described also includes：
The purpose Vehicle mounted station after the multicast packet is obtained, by the multicast packet be sent to each with it is described
The corresponding PIS receiving terminals of multicast ip address, so as to receive the PIS receiving terminals of the multicast packet to the PIS industry
Business data are shown.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, the part shown as unit can be or may not be physics list
Member, you can with positioned at a place, or can also be distributed on multiple NEs.It can be selected according to the actual needs
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to pass through hardware.Understood based on such, on
The part that technical scheme substantially in other words contributes to prior art is stated to embody in the form of software product, should
Computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including some fingers
Order is to cause a computer equipment (can be personal computer, server, or network equipment etc.) to perform each implementation
Method described in some parts of example or embodiment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of subway PIS business multi-cast systems based on Long Term Evolution LTE, it is characterised in that the system includes：Connect successively
Passenger information system PIS servers, source Vehicle mounted station, core network packet core evolution EPC, base station and at least one the purpose car connect
Microscope carrier, sound cross network transmission tunnel is equipped between the source Vehicle mounted station and each purpose Vehicle mounted station；
The PIS servers, for the multicast packet including PIS business datums to be sent to the source Vehicle mounted station；
The source Vehicle mounted station, for being replicated to the multicast packet, and the multicast packet after duplication is passed through described
Sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
The purpose Vehicle mounted station, for obtaining the multicast packet, to realize the multicast of subway PIS business.
2. the system as claimed in claim 1, it is characterised in that the sound cross network transmission tunnel is that generalized routing protocol encapsulates GRE
Tunnel.
3. system as claimed in claim 2, it is characterised in that the source Vehicle mounted station, is further used for the multicast after duplication
Packet carries out GRE encapsulation, and the packet after GRE is encapsulated sequentially passes through the core net by the sound cross network transmission tunnel
EPC and base station are transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station, the packet for being further used for receiving is decapsulated, to obtain the multicast
Packet.
4. system as claimed in claim 3, it is characterised in that the source Vehicle mounted station, is further used for multicast after replication
The new IP headers of GRE and the IP address including purpose Vehicle mounted station are encapsulated on packet, the number of GRE and new IP headers will be encapsulated
The core net EPC and base station are sequentially passed through by the sound cross network transmission tunnel according to the IP address of the purpose Vehicle mounted station according to bag
Transmit to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station, the GRE heads and new IP headers being further used in the packet that will receive is peeled off,
To obtain the multicast packet.
5. such as system according to any one of claims 1 to 4, it is characterised in that also include in the multicast packet：Multicast
IP address；
The purpose Vehicle mounted station, is additionally operable to after the multicast packet is obtained, by the multicast packet be sent to each with
The corresponding PIS receiving terminals of the multicast ip address, so as to receive the PIS receiving terminals of the multicast packet to described
PIS business datums are shown.
6. a kind of subway PIS business method of multicasting based on LTE using system according to any one of claims 1 to 5, its
It is characterised by, methods described includes：
PIS servers send the multicast packet including PIS business datums to source Vehicle mounted station；
The source Vehicle mounted station is replicated to the multicast packet, and the multicast packet after duplication is passed through into sound cross network transmission tunnel
Road sequentially passes through core net EPC and base station is transmitted to each purpose Vehicle mounted station；
The purpose Vehicle mounted station obtains the multicast packet, to realize the multicast of subway PIS business.
7. method as claimed in claim 6, it is characterised in that the sound cross network transmission tunnel is gre tunneling.
8. system as claimed in claim 7, it is characterised in that the source Vehicle mounted station by the multicast packet after duplication by across
Net transmission tunnel sequentially passes through core net EPC and base station is transmitted to each purpose Vehicle mounted station, further comprises：
Multicast packet after duplication is carried out GRE encapsulation by the source Vehicle mounted station, and the packet after GRE is encapsulated pass through it is described
Sound cross network transmission tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station obtains the multicast packet, further comprises：
The purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet.
9. method as claimed in claim 8, it is characterised in that the source Vehicle mounted station carries out the multicast packet after duplication
GRE is encapsulated, and the packet after GRE is encapsulated sequentially passes through the core net EPC and base station by the sound cross network transmission tunnel
Transmit to each purpose Vehicle mounted station, further comprise：
The multicast packet of the source Vehicle mounted station after replication wraps the new IP of encapsulation GRE and the IP address including purpose Vehicle mounted station
Header, the sound cross network transmission is passed through by the packet of encapsulation GRE and new IP headers according to the IP address of the purpose Vehicle mounted station
Tunnel sequentially passes through the core net EPC and base station is transmitted to each purpose Vehicle mounted station；
Correspondingly, the purpose Vehicle mounted station is decapsulated the packet received, to obtain the multicast packet, enters one
Step includes：
The purpose Vehicle mounted station peels the GRE heads in the packet received and new IP headers off, to obtain the multicast packet
Bag.
10. the method as any one of claim 6~9, it is characterised in that also include in the multicast packet：Group
Broadcast IP address；
The purpose Vehicle mounted station is obtained after the multicast packet, and methods described also includes：
The multicast packet is sent to each and the multicast by the purpose Vehicle mounted station after the multicast packet is obtained
The corresponding PIS receiving terminals of IP address, so as to receive the PIS receiving terminals of the multicast packet to the PIS business number
According to being shown.
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| CN201610091431.2A CN107094117A (en) | 2016-02-18 | 2016-02-18 | Subway PIS business multi-cast system and method based on LTE |
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| CN201610091431.2A CN107094117A (en) | 2016-02-18 | 2016-02-18 | Subway PIS business multi-cast system and method based on LTE |
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| CN112511991A (en) * | 2020-11-27 | 2021-03-16 | 锐捷网络股份有限公司 | On-demand method, equipment and storage medium |
| CN118631798A (en) * | 2024-08-09 | 2024-09-10 | 天津七一二移动通信股份有限公司 | Web page management method of subway TAU equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019223639A1 (en) * | 2018-05-21 | 2019-11-28 | 华为技术有限公司 | Wireless communication method and device |
| US12010018B2 (en) | 2018-05-21 | 2024-06-11 | Huawei Technologies Co., Ltd. | Wireless communication method and device |
| CN112511991A (en) * | 2020-11-27 | 2021-03-16 | 锐捷网络股份有限公司 | On-demand method, equipment and storage medium |
| CN118631798A (en) * | 2024-08-09 | 2024-09-10 | 天津七一二移动通信股份有限公司 | Web page management method of subway TAU equipment |
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