CN108235259B - Method and device for realizing multicast service of packet transport network and communication system - Google Patents
Method and device for realizing multicast service of packet transport network and communication system Download PDFInfo
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Abstract
In the method, the device and the communication system for implementing the multicast service of the packet transport network provided by the embodiment of the present invention, a packet transport network device receives the multicast service sent by a gateway device through a P2MP channel, and the packet transport network device pushes the multicast service to a drop base station; in the process of directly pushing the received multicast service to the preset packet transport network equipment through the P2MP channel, only one piece of service data needs to be pushed, so that the data volume sent by the gateway is greatly reduced, the link setting between the gateway and the equipment is also reduced, the consumption and waste of unnecessary resources are reduced, the processing efficiency of gateway data is improved, then the packet transport network performs protocol interaction with the lower hanging base station respectively, the accuracy of service pushing is ensured, the system resources are effectively utilized, and the flexible control of the pushing of the multicast service is realized.
Description
Technical Field
The present invention relates to the technical field of data transmission networks, and in particular, to a method and an apparatus for implementing a multicast service in a packet transport network.
Background
Because an operator starts to support enhanced MultiMedia Broadcast Multicast Service (eMBMS), the requirement for the bandwidth utilization of a packet-switched network is increased, and the existing communication system adopts a dedicated physical channel to realize the mbms, specifically, a dedicated physical channel is provided between each ue and a server for its respective use. That is, even if multiple user equipments receive data streams of the same service, the data streams need to be implemented by respective dedicated physical signals, and the server needs to feedback the request of obtaining the data streams sent by the respective users. The method is simple to implement and is suitable for the situation that the number of multicast service users is small, but for the situation that the number of multicast service users is large, when the method is implemented by using the method again, an external communication link is set for each multicast service user, the consumed resources are very large, the cost is also high, the data processing amount of the server is also very large, the load brought to the server is large, and a large amount of code resources and power resources are consumed.
Disclosure of Invention
The method and the device for realizing the multicast service of the packet transport network mainly solve the technical problems that more special communication links need to be arranged and the interactive data quantity of the server is large in the conventional multi-multicast service realization mode, so that the resource is wasted.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for implementing a multicast service in a packet transport network, where the method includes:
the packet transport network equipment receives the multicast service sent by the gateway equipment through a point-to-multipoint P2MP channel;
and the packet transport network equipment pushes the multicast service to the downlink base station.
The embodiment of the present invention further provides a device for implementing a multicast service in a packet transport network, including: the system comprises a receiving module and an interaction module;
the receiving module is used for receiving the multicast group service sent by the gateway equipment through the point-to-multipoint P2MP channel through the packet transport network equipment;
the interaction module is used for pushing the multicast group service received by the packet transport network device to the downlink base station.
The embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used for executing the provided multicast service implementation method of the packet transport network.
The invention has the beneficial effects that:
according to the method, the device and the computer storage medium for realizing the multicast service of the packet transport network provided by the embodiment of the invention, the packet transport network equipment receives the multicast service sent by the gateway equipment through a point-to-multipoint P2MP channel, the packet transport network equipment interacts with the drop-on base station through a preset interaction protocol, and the multicast service is pushed to the drop-on base station; by implementing the method provided by the invention, the gateway equipment only needs to push one piece of service data in the process of directly pushing the received multicast service to the preset packet transport network equipment through the point-to-multipoint channel, so that the workload of gateway interaction data is greatly reduced, the link setting between the gateway equipment and other equipment is reduced, the consumption and waste of unnecessary resources are reduced, the cost is reduced, the processing efficiency of the gateway data is improved, then the packet transport network respectively carries out protocol interaction with the lower hanging base station, one-by-one multicast service pushing is realized, the accuracy of service pushing is ensured, the system resources are effectively utilized, and the flexible control of the multicast service pushing is realized.
Drawings
Fig. 1 is a flowchart of a method for implementing a multicast service in a packet transport network according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an edge device in which both the L2VPN and the L3VPN support P2MP according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an edge device only supporting P2MP in an L3VPN according to an embodiment of the present invention;
fig. 4 is a block diagram of a multicast service implementation apparatus of a packet transport network according to a second embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the method for implementing multicast service provided by this embodiment is mainly proposed based on a device supporting a P2MP (Point-to-Multiple Point) channel, where the P2MP channel has a characteristic that any multicast Group occupies only one traffic in the same physical span in a Network, and a multimedia broadcast multicast service gateway (MBMS _ GW) pushes all multicast services to Packet Transport Network devices (PTNs) of all directly connected base stations through the P2MP channel, and then uses the Packet Transport Network devices as an interrogator, and interacts with a lower-hanging base station through an Internet Group Management Protocol (IGMP) to determine multicast traffic correspondingly pushed by each base station, thereby solving the problem in the prior art that a dedicated communication link needs to be set between each user and the gateway, and a request sent by the gateway to each user respectively acquires a data stream, which results in an excessive load on the gateway, the problem of resource waste.
Referring to fig. 1, fig. 1 is a flowchart of a method for implementing a multicast service in a packet transport network according to this embodiment, where the method specifically includes the following steps:
s101, a packet transport network device receives a multicast service sent by a gateway device through a point-to-multipoint P2MP channel, and the packet transport network device is used for pushing the multicast service to a downlink base station.
In this embodiment, the packet transport network device is a preset PTN device or a PC capable of supporting point-to-multipoint P2MP channel transport, and the packet transport network device may be a bridging device for bridging a second layer virtual network layer and a third layer virtual network layer, or a PTN device directly connected with at least one base station; when the packet transport network devices connected to the gateway device support P2MP channels, after the gateway device receives the multicast traffic sent by an external server, the received multicast traffic is directly sent to the packet transport network device through the P2MP channel, preferably, because the point-to-multipoint P2MP channel has the characteristics of receiving one data traffic and outputting multiple data traffic, according to the characteristics, when the gateway device sends the multicast traffic, the gateway device does not need to send the multicast traffic according to the number of the base stations to be hung, the service gateway device requiring the same service for multiple base stations to be hung only needs to send one traffic, does not need to send the traffic for each base station, and only needs to set one P2MP channel when communicating with multiple PTN devices through the P2MP channel, thereby greatly reducing traffic load when the gateway device sends the traffic respectively.
In this embodiment, before the step of receiving the multicast service through the point-to-multipoint P2MP channel, the method further includes: inquiring whether a point-to-multipoint P2MP channel exists between the packet transmission network equipment and the gateway equipment; if not, the point-to-multipoint P2MP channel is created according to a preset channel model.
Further, after the point-to-multipoint P2MP channel is created, to facilitate subsequent use, the method further includes: and adding a query label to the created point-to-multipoint P2MP channel, and updating the created channel and the corresponding query label into a corresponding relation table.
And S102, the packet transport network equipment pushes the multicast service to a downlink base station.
In this embodiment, when performing multicast service interaction between the packet transport network device and the downlink base station, the multicast service interaction is performed through a preset interaction protocol, and preferably, the preset interaction protocol is an IGMP protocol; after the packet transport network device receives the multicast service sent by the gateway, the packet transport network device queries the corresponding multicast service from the multicast service according to the service request of each hung base station and sends the multicast service to the corresponding base station.
Preferably, in this embodiment, the packet transport network device is used as an IGMP querier, and the packet transport network device and the under-hanging base station interact with each other through an IGMP protocol, specifically, the packet transport network device and the under-hanging base station query, through an internet group management protocol, an actually interacted multicast service corresponding to the under-hanging base station, and push the corresponding multicast service to the under-hanging base station according to the queried actually interacted multicast service, that is, select, from the multicast services, a multicast service push corresponding to the base station according to an actual situation of interaction with the under-hanging base station.
In this embodiment, when all packet transport network devices in a second layer virtual network layer (L2VPN, also called an access layer) and a third layer virtual network layer (L3VPN, also called a convergence layer) support a P2MP channel, the packet transport network devices are access layer packet transport network devices directly connected with at least one downlink base station, the receiving module receives, through the access layer packet transport network devices, a multicast group service sent by the gateway device through a point-to-multipoint P2MP channel, the access layer packet transport network devices issue the received multicast service to the downlink base station according to a corresponding interaction protocol, specifically, the gateway device sends the multicast service to the access layer packet transport network devices connected with the downlink base station through a point-to-multipoint P2MP channel.
As shown in fig. 2, for the schematic diagram of the edge device in which both L2VPN and L3VPN support P2MP provided in this embodiment, a multicast traffic sent from an external server is received at an MBMS _ GW (gateway device), where the multicast traffic includes traffic of at least one service type, for example, video traffic, television programs, audio traffic, and so on. When a plurality of downlink base stations interact with multicast services of the same service type, the required flow is the same, therefore, the PTN device directly copies the corresponding multicast services and respectively pushes the copied multicast services to the base stations, when the service types interacted with the plurality of base stations are different, the PTN device needs to acquire the flow required by the service type interacted with each base station before pushing the multicast services, and pushes the corresponding flow for the base stations according to the service types.
Further, the MBMS _ GW directly sends the received multicast traffic to the PTN devices K1 and K2 without performing any screening process; after receiving the multicast service, the K1 and the K2 push the multicast service according to the request sent by the next-layer PTN device or the base station, where the specific push mode is as follows:
in the first mode, when a service request of a base station is received, the K1 queries a corresponding multicast service from multicast traffic according to the service request of the base station 1 and sends the multicast service to the base station 1, and finally, the multicast service is pushed to user equipment through the base station;
in a second mode, when the K1 receives a multicast service request sent by the next-layer PTN device, the K1 sends all received multicast traffic to the PTN device N1, then the N1 queries a corresponding multicast service from a multicast service packet according to the service request sent by the device connected to the N1 to push, and finally the device pushes the received multicast service to the user equipment.
In this embodiment, regardless of whether the PTN device is connected to the base station or the PTN device, the first multicast traffic may be pushed in the manner described above, and the PTN device on each layer may be pushed after being appropriately screened, so that not only may the traffic resources of each PTN device be fully utilized, but also the pushing efficiency may be greatly improved. Of course, if the PTN device is connected with both the base station and the PTN device, the service traffic is pushed according to the first and second methods.
As shown in fig. 3, for the schematic diagram of the edge device that only supports P2MP in L3VPN provided in this embodiment, a specific process for implementing multicast service interaction based on the edge device in fig. 3 is as follows:
when there is a packet transport network device in the L2VPN that does not support the P2MP tunnel and all packet transport network devices in the L3VPN support the point-to-multipoint tunnel, the multicast service sent by the packet transport network device through the point-to-multipoint P2MP tunnel receiving gateway device is: the packet transport network device is a packet transport network device bridged by two-three virtual networks of a second layer virtual network layer L2VPN and a third layer virtual network layer L3VPN, the receiving module receives the multicast group service sent by the gateway device through a point-to-multipoint P2MP channel through the packet transport network device bridged by two-three virtual networks, and the packet transport network device bridged by two-three virtual network layers pushes the received multicast group service to the next access layer packet transport network device.
As shown in fig. 3, the L3VPN includes PTN devices K1, K2, and M1 to M4, where M1 to M4 are bridging devices between the L2VPN and the L3VPN, and K1, K2, and M1 to M4 are new devices supporting P2MP, and in an interaction process of multicast services of the L3VPN and the MBMS _ GW, the MBMS _ GW receives multicast traffic sent from an external server, where the multicast traffic includes traffic of at least one service type, for example, video traffic, television programs, audio traffic, and so on. The MBMS _ GW directly sends the received multicast traffic to PTN equipment K1 and K2 without any screening processing; after receiving the multicast traffic, the K1 and the K2 push the multicast traffic according to a request sent by the next-layer PTN device or the base station, that is, the multicast service interaction process between the device M1, the device M3 and the base station 1 connected to the K1 shown in fig. 3, and the multicast service interaction process between the K1 and the device M1, the device M3 and the base station 1 are the same as those in fig. 2, and thus, the description is not repeated here.
For service interaction of each device or base station in the L2VPN, as shown in fig. 3 and the interaction process between the base stations specifically performs interaction through the original communication link, preferably, the device is directly connected to the devices N1, N2, and device A, B, C, D connected to the lower-level devices N1, N2, and device A, B, C, D through M1 and M2 through VPLS or VPLS, the two-layer and three-layer bridging PTN devices M1 and M2 respectively issue multicast traffic to the devices N1 and N2, the device N1 then issues the multicast traffic to the device A, B, C, D, and finally, the device A, B, C, D is used as an IGMP querier to interact with the lower-level base station through an IGMP protocol to determine whether to push the multicast service, and which group services are to be pushed.
In this embodiment, the implementation of the push processing from the PTN device to the downlink base station by using the PTN device as an IGMP querier specifically includes: when a plurality of base stations are connected to the lower portion of the packet transport network device, a plurality of multicast services are copied to the packet transport network device according to the push number of a preset virtual local area network, and the multicast services are respectively pushed to the corresponding base stations, specifically, the packet transport network device includes a packet transport network device for realizing two-layer and three-layer virtual network bridging and other packet transport network devices connected with the base stations, but no matter which packet transport network device is connected with the base stations, the received multicast services can be copied according to a request and then respectively sent to the base stations, specifically, the multicast services are copied according to the number of the base stations hung to the virtual local area network, and the copied multicast services are respectively pushed to the corresponding base stations.
As shown in fig. 3, a base station 2 and a base station 3 are hung below a device a, when two base stations simultaneously request the same service, both of which are video traffic, the device a queries the number of received service requests related to the video traffic or queries a preset number of virtual local area network service pushes after receiving multicast traffic sent by a device N1, where the number of virtual local area network service pushes is preset according to the number of hung base stations, the device a copies the video traffic according to the queried number of service requests or the queried number of service pushes, the copied score is equal to the queried number of service requests or the queried number of service pushes, and finally, the obtained video traffic is pushed to a plurality of corresponding hung base stations respectively.
In the method for implementing multicast services in a packet transport network according to the embodiments of the present invention, an MBMS _ GW pushes all multicast services to PTN devices directly connected to base stations through a P2MP channel, and then determines the multicast services correspondingly pushed by the base stations through IGMP protocol interaction with a lower-hanging base station by using the PTN devices as an inquirer, so that the MBMS _ GW only needs to push one service data, thereby greatly reducing the workload of gateway interaction data, and solving the problems of excessive gateway load and resource waste caused by the fact that a dedicated communication link needs to be set between each user and a gateway, and a gateway acquires a data stream for each request sent by each user in the prior art.
Example two:
referring to fig. 4, fig. 4 is a block diagram of a structure of a multicast service implementing device of a packet transport network according to this embodiment, where the multicast service implementing device 4 of the packet transport network includes: a receiving module 41 and an interaction module 42, wherein:
the receiving module 41 receives, through a packet transport network device, the multicast group service sent by the gateway device through the P2MP channel, where the preset packet transport network device is used to push a multicast group to a downlink base station.
In this embodiment, the packet transport network devices connected to the gateway device all support P2MP channels, when sending the multicast service, the receiving module 41 does not need to send according to the number of the base stations to be hung down, only one service gateway device having the same requirements for a plurality of base stations to be hung down needs to send, and does not need to send for each base station, and when communicating with a plurality of PTN devices through a P2MP channel, only one P2MP channel needs to be set, so that the traffic load when the gateways send respectively is greatly reduced.
In this embodiment, the multicast service implementing apparatus further includes an inquiring module, a channel creating module and a label module, where the inquiring module is configured to inquire whether a point-to-multipoint P2MP channel already exists between the packet transport network device and the gateway device; and if the channel does not exist, the channel creating module creates a point-to-multipoint P2MP channel according to a preset channel model.
The label module is configured to add a label to the created point-to-multipoint P2MP channel, where the label is used to identify the point-to-multipoint P2MP channel, and is specifically used when querying a P2MP channel between the packet transport network device and the gateway device, and the corresponding P2MP channel may be queried directly through the label.
The interactive module 42 pushes the multicast service received by the packet transport network device to the downlink base station.
In this embodiment, when performing multicast service interaction between the packet transport network device and the downlink base station, the multicast service interaction is performed through a preset interaction protocol, and preferably, the preset interaction protocol is an IGMP protocol; the interaction module 42 uses the packet transport network device as an IGMP querier, and the packet transport network device and the drop base station query a corresponding multicast service through an internet group management protocol, and push the corresponding multicast service to the drop base station according to the queried multicast service. Specifically, after the packet transport network device receives the multicast service sent by the gateway, the packet transport network device queries the corresponding multicast service from the multicast service packet according to the service request of each downlink base station and sends the multicast service to the corresponding base station.
In this embodiment, when all the packet transport network devices in the L2VPN and the L3VPN support the point-to-multipoint channel, the interaction module 42 pushes the multicast service to the packet transport network device through the point-to-multipoint channel, specifically, the gateway device sends the multicast service to the access layer packet transport network device connected with the drop base station through the point-to-multipoint P2MP channel.
As shown in fig. 2, after receiving the multicast traffic sent from the external server, the MBMS _ GW directly sends the multicast traffic to PTN devices K1 and K2; and after receiving the multicast service, the K1 and the K2 push the multicast service according to the request sent by the next layer of PTN equipment or the base station.
When the service request of the base station is received, the K1 inquires the corresponding multicast service from the multicast service packet according to the service request of the base station 1 and sends the multicast service to the base station 1, and finally the multicast service is pushed to the user equipment through the base station; when the K1 receives a multicast service request sent by the next-layer PTN device, the K1 sends all the received multicast services to the PTN device N1, then the N1 queries the corresponding multicast services from the multicast services according to the service request sent by the device connected to the N1 to push, and finally the device pushes the received multicast services to the user equipment.
When there is a packet transport network device in the L2VPN that does not support the P2MP tunnel and all packet transport network devices in the L3VPN support the point-to-multipoint tunnel, the interaction module 42 pushes the multicast group service to each two-three layer virtual network bridging packet transport network device in the L3VPN through the P2MP tunnel by the gateway device, and then pushes the multicast group service to the next access layer packet transport network device through each two-three layer virtual network bridging packet transport network device.
As shown in fig. 3, the interaction process of multicast services of L3VPN and MBMS _ GW is the same as that in fig. 2, when services of each device or base station in L2VPN interact, the PTN devices M1 and M2 bridged by two-layer virtual network respectively issue multicast traffic to devices N1 and N2, and device N1 issues to device A, B, C, D, and finally, device A, B, C, D is used as an IGMP querier to interact with the base station under hook via IGMP protocol to determine whether to push multicast traffic and which multicast group traffic to push. Preferably, the implementation is through VPLS or VPLS.
In this embodiment, when the packet transport network device corresponds to a plurality of downlink base stations, the interaction module 42 is configured to copy, at the packet transport network device, a plurality of multicast page flows according to a preset number of pushed virtual local area networks, and respectively push multicast service flows to the corresponding plurality of downlink base stations, where the packet transport network device specifically includes a packet transport network device for implementing two-layer and three-layer virtual network bridging and other packet transport network devices connected to the plurality of base stations, but regardless of which packet transport network device, a situation that the plurality of base stations are connected may exist, and at this time, the received multicast service may be copied according to a request and then respectively sent to the base stations.
In this embodiment, the functions implemented by the modules of the multicast service implementation apparatus 4 provided in fig. 4 may also be implemented by a processor, a receiving module, and a sending module, and at this time, the implementation manner of the multicast service implementation apparatus of the packet transport network may be as follows:
the receiving module receives the multicast service sent by the server;
the processor pushes the received multicast service to a packet transport network device through a P2MP channel, wherein the packet transport network device is configured to push the multicast service to a downlink base station.
And the processor performs protocol interaction with the lower hanging base station and inquires service multicast flow corresponding to each lower hanging base station, so that the pushing processing of the multicast service from the packet transmission network equipment to the lower hanging base station is realized.
Further, the receiving module 41 may be implemented by directly using a home gateway supporting a P2MP channel, and the interacting module 42 is implemented by using a PTN device, where the interacting process is as follows: the home gateway receives multicast traffic from the server, and then establishes a P2MP channel with the PTN device of the access layer to send multicast service to the PTN device of the access layer through the P2MP channel, and interacts with the downlink base station through an IGMP protocol by taking the PTN device of the access layer as an inquirer to determine a multicast month needing to be pushed.
In this embodiment, the process of establishing the P2MP channel between the home gateway and the PTN device of the access stratum is as follows:
The step is mainly used for judging whether a P2MPSwitch node corresponding to the multicast flow exists or not, if not, the new node is established, the newly established node is hooked with brother relations with other original P2MPSwitch nodes, a model is informed, and a table generator is informed to update a node list; or judging whether a multicast stream point corresponding to the multicast flow exists or not, if not, establishing the multicast stream point, hooking the newly established node and other original multicast stream points with a brother relationship, informing a model, and informing a table generator to update a node list, wherein the model refers to an establishing rule of an establishing node or a stream point preset on the PTN equipment, and the establishing node or the stream point is established through the corresponding establishing rule. If yes, directly inquiring the outgoing LSP node and the incoming LSP node and the outgoing LSP stream point and the incoming LSP stream point to carry out interaction of the multicast service.
And 2, establishing an outgoing LSP node and an outgoing LSP flow point, hanging a parent-child relationship, informing a model according to the relationship between the outgoing LSP port information hanging LSP node and a physical port on the device, and informing a table generator, wherein the parent-child relationship refers to the relationship between the nodes and the flow points, and a plurality of flow points exist under one node.
In this embodiment, when the newly-created P2MPSwitch node is a non-root node, an ingress LSP node and an ingress LSP flow point need to be established, as specifically shown in step 3.
Step 3, establishing an ingress LSP node and an LSP flow point by a non-root node, hooking a parent-child relationship between the LSP node and a port according to ingress LSP port information, notifying a model and notifying a table generator;
step 4, hooking parent-child relations between outgoing LSP flow points and multicast flow points, hooking brother relations between P2MPSwitch nodes and the multicast flow points and the incoming LSP flow points respectively, informing a model and informing a table generator;
and 5, configuring the attribute of the relevant node, informing the model and informing the generator of the table.
In this embodiment, the apparatus for implementing multicast service in a packet transport network further includes a step of performing real-time detection on P2MP channels, and determining whether each channel does not perform multicast service interaction for a long time, if yes, performing a channel deletion step, which is specifically as follows:
step one, notifying the L3 multicast command processor to process, notifying the model, and notifying the table generator to update the node list.
And step two, releasing the multicast stream point index, informing the model and informing the form builder to update the node list.
And step three, releasing the relationship between the incoming LSP and the port, the relationship between the outgoing LSP flow point and the multicast flow point, the relationship between the P2MPswitch node and the multicast flow point, and the relationship between the incoming LSP flow point, informing the model, and informing the forming device to update the node list.
And step four, deleting all nodes and flow points related to P2MP, notifying the model, and notifying the formation device to update the node list.
In this embodiment, in order to facilitate direct query and invocation during subsequent multicast service interaction, after a P2MP channel is established between the home gateway and the PTN device in the access stratum through the above steps, a tag is added to the newly created P2MP channel, and the specific steps are as follows:
step a, after receiving a command of adding a P2MP channel label, inquiring a label map, and processing the storage of the label map;
b, detecting the change of the corresponding channel label, setting the input label corresponding to the old channel as an invalid value, informing the model, and informing the table generator to update the changed channel label;
step c, setting an incoming label of a P2MP channel, informing a model, and informing a form builder to update a node list;
when a command for deleting the P2MP channel label is received, the label map is inquired, and the corresponding channel is deleted.
Correspondingly, the invention also provides a communication system, which comprises the multicast service implementation device of the packet transport network, wherein the system pushes the multicast service to the packet transport network equipment through the P2MP channel, and the packet transport network equipment is used as an inquirer to perform protocol interaction with the drop base station, so that the push processing of the multicast service from the packet transport network equipment to the drop base station is implemented.
In summary, in the method and apparatus for implementing a multicast service in a packet transport network according to the embodiments of the present invention, a packet transport network device receives a multicast service sent by a gateway device through a point-to-multipoint P2MP channel, and the packet transport network device interacts with a downlink base station through a preset interaction protocol and pushes the multicast service to the downlink base station; by implementing the method provided by the invention, the gateway only needs to push one part of service data in the process of directly pushing the received multicast service to the preset packet transport network equipment through the P2MP channel, thereby greatly reducing the workload of gateway interaction data, simultaneously reducing the link setting between the gateway and the equipment, reducing the consumption and waste of unnecessary resources, lowering the cost, improving the processing efficiency of gateway data, and then carrying out protocol interaction with the lower hanging base station respectively by the packet transport network, realizing one-by-one multicast service pushing, ensuring the accuracy of service pushing, effectively utilizing system resources and realizing the flexible control of multicast service pushing.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the invention described above may be implemented in a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented in program code executable by a computing device, such that they may be stored on a computer storage medium (ROM/RAM, magnetic disk, optical disk) and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. A method for realizing multicast service of packet transport network is characterized in that the method comprises the following steps:
the packet transport network equipment receives the multicast service sent by the gateway equipment through a point-to-multipoint P2MP channel;
the packet transmission network equipment and the lower hanging base station inquire the corresponding actual interactive multicast service of the lower hanging base station through an Internet group management protocol;
and the packet transport network equipment selects adaptive multicast services from the multicast services and pushes the adaptive multicast services to the downlink base station according to the inquired actual interactive multicast services.
2. The method of claim 1, wherein the pushing, by the packet transport network device, the multicast service to a drop base station comprises:
the multicast service is pushed to an access layer packet transport network device directly connected with at least one lower hanging base station by the packet transport network device, the multicast service is respectively issued to the lower hanging base stations by the access layer packet transport network device, and the packet transport network device is a bridging device for bridging a second layer virtual network layer L2VPN and a third layer virtual network layer L3 VPN.
3. The method as claimed in claim 1 or 2, wherein before the packet transport network device receives the multicast service sent by the gateway device through the point-to-multipoint P2MP channel, the method further comprises: inquiring whether the point-to-multipoint P2MP channel already exists between the packet transmission network device and the gateway device; and if not, creating the point-to-multipoint P2MP channel according to a preset channel model.
4. The method as claimed in claim 3, wherein after the creating the point-to-multipoint P2MP tunnel according to the preset tunnel model, the method further comprises: adding a label to the point-to-multipoint P2MP channel, wherein the label is used to identify the point-to-multipoint P2MP channel.
5. A device for realizing multicast service of packet transport network is characterized in that it includes: the system comprises a receiving module and an interaction module;
the receiving module is used for receiving the multicast group service sent by the gateway device through the point-to-multipoint P2MP channel through the packet transport network device;
the interaction module is used for inquiring the multicast service corresponding to actual interaction of the lower hanging base station through an internet group management protocol with the lower hanging base station, selecting the adaptive multicast service from the multicast service according to the inquired actual interaction multicast service and pushing the adaptive multicast service to the lower hanging base station.
6. The apparatus of claim 5, wherein the interaction module is configured to push the multicast service to an access stratum packet transport network device directly connected to at least one drop base station through the packet transport network device, and the access stratum packet transport network device issues the multicast service to the drop base station respectively, where the packet transport network device is a bridging device configured to bridge a second layer virtual network layer L2VPN and a third layer virtual network layer L3 VPN.
7. The apparatus for implementing multicast service in packet transport network according to claim 5 or 6, further comprising an inquiry module and a channel creation module, wherein the inquiry module is configured to inquire whether the point-to-multipoint P2MP channel already exists between the packet transport network device and the gateway device; and if the channel does not exist, the channel creating module creates a point-to-multipoint P2MP channel according to a preset channel model.
8. The apparatus of claim 7, further comprising a label module for adding a label to the created point-to-multipoint P2MP channel, wherein the label is used to identify the point-to-multipoint P2MP channel.
9. A communication system, comprising: a multicast service implementing apparatus of a packet transport network according to any one of claims 5 to 8.
10. A computer apparatus, wherein the computer comprises: a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute one or more computer programs stored in the memory to implement the steps of the multicast service implementation method of the packet transport network according to any one of claims 1 to 4.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores one or more computer programs which are executable by one or more processors to implement the steps of the multicast service implementing method of the packet transport network according to any one of claims 1 to 4.
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