WO2007036150A1

WO2007036150A1 - A system and a method for controlling of the access network

Info

Publication number: WO2007036150A1
Application number: PCT/CN2006/002542
Authority: WO
Inventors: Weilong Ouyang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-09-30
Filing date: 2006-09-27
Publication date: 2007-04-05
Also published as: DE112006004275A5; DE112006002598T5; DE112006002598B4; CN1941715B; CN1941715A

Abstract

A method and a system for controlling of the access network includes an A-RCEF (Access network Resource Control Execute Function) and its access communicated with other unit are added in the access network, the said A-RCEF is used for collecting the topology information of the access network, and reports the information to RCEF (Resource Control Execute Function) via a corresponding access, so that the RCEF is able to control and manage the utilization situation of the access network resource based on the said topology information of the access network. There are a method for resource controlling of the access network and a system thereof. It is able to ensure the Qos from users to edge network.

Description

System and method for implementing access network control

Technical field

The present invention relates to the field of network communication technologies, and in particular, to a system and method for implementing access network control. Background of the invention

With the continuous development of technology, the technology trend of providing triple play (traditional telecommunication network, Internet and cable TV) on IP has become increasingly apparent. The original design of the IP network is only to solve the interconnection problem between devices located in different physical locations, which is extremely open. It is precisely because of its openness that the Internet technology has been greatly developed in just ten years, and it has basically spread to the family and become an indispensable part of people's daily life and work. At the same time, because of the openness of the IP network and the ability to provide only interconnection capabilities, it cannot guarantee the service quality of the service and the security of the user accessing the network.

To this end, ETSI TISPAN (European Telecommunication Standardization Association's telecommunications and Internet convergence services and advanced network protocols) uses the network structure shown in Figure 1 to perform QoS (Quality of Service) control on IP Edge (IP Edge) networks, as shown in Figure 1. As shown, the control system includes A-RACF (resource access control function of the access network) and SPDF (policy decision function). In the network structure, the service in the network may provide a certain level of service quality assurance; however, in the network structure, only one logical interface is reserved for the access network, and the specific application form of the logical interface is not determined, therefore, The service quality of the service cannot be guaranteed in the access network, that is, the end-to-end quality of service guarantee cannot be implemented in the network structure shown in FIG. 1.

In the actual application process, the access network such as DSL (Digital Subscriber Line) aggregates the traffic of a large number of users and sends them to the IP Edge for Layer 2 termination and provides Layer 3 services. The control system of TISPAN can solve the problem after the IP Edge. Business service quality issues, but can not solve the quality of service from the user to the IP Edge.

At present, the widely used ADSL (Asymmetric Digital Subscriber Line) access technology can partially solve the uplink quality of service problem through differential service mode by adopting a traffic model with small uplink bandwidth and large downlink bandwidth. However, with the advent of emerging access technologies, such as GP0N (Gigabit Passive Optical Network), SH. DSL (High-Speed Digital Subscriber Line), etc., the traffic model with little difference in uplink and downlink bandwidth, the above-mentioned user to IP The quality of service issues between Edges are revealed.

Therefore, if the next-generation telecommunications network provides reliable service quality as PSTN (traditional telephone network), it needs to solve the service quality assurance problem of the last "one kilometer" (ie access network) that plagues broadband development.

That is to say, due to the insured quality of the access network, the end-to-end quality of service cannot be provided in the network, and the uplink bandwidth of the emerging access technology cannot be used to provide services to users more effectively. Summary of the invention It is an object of the present invention to provide a system and method for implementing access network control, so that end-to-end service quality assurance for access users can be implemented in the network.

The object of the present invention is achieved by the following technical solutions - The present invention provides a system for implementing access network control, including an access network and an IP edge, and the access network is provided with access network resource control execution a functional entity, and the access network resource control executive function entity provides

The resource control in the IP edge performs the function of the RCEF entity communication interface, and the access network resource control execution function entity of the interface reports the collected topology information of the access network to the RCEF entity, and receives the RCEF entity. The resource control strategy is sent to control the resources of each node.

The access network resource control execution function entity includes: a topology information collection module: configured to collect topology information of each node in the access network, and send the information to the RCEF entity through the interface;

The resource control policy execution module: receives the resource control policy or the resource control command delivered by the RCEF entity, and controls and manages the resource of the node according to the resource control policy or the resource control command.

The topology information includes: connectivity of each node in the access network, port attributes, link information of each node of the user equipment in the access network, and/or a communication address of each node in the access network.

The RCEF entity includes:

The access network topology information saving module is configured to save topology information of each node in the access network sent by the access network resource control execution function entity, and provide the access network resource control policy processing module;

The access network resource control policy processing module is configured to determine a resource control policy for each node according to the topology information, and send the resource control policy to the access network resource control execution function entity.

The information stored by the access network topology information saving module includes at least one of the following information determined according to topology information of each node: link information, RCEF, and access network resource control execution function of the user directly connected to the second layer node; The port attribute directly connected to the entity, and the association between the RCEF and the communication address of the access network resource control execution function entity.

The present invention also provides a method for implementing access network control, including:

The access network resource control execution function entity set in the access network collects the topology information of the access network and reports it to the RCEF entity;

The RCEF entity determines the resource control policy in the access network according to the topology information of the access network, and sends the resource control policy to the access network resource control execution function entity;

The access network resource control execution function entity inputs resources of nodes in the access network according to the resource control policy Line control management.

The topology information of the access network includes:

The connectivity of each node in the access network, the port attributes, the link information of the user equipment at each node of the access network, and/or the communication address information of each node in the access network.

In the present invention, when the user logs in to the network, the process of determining the resource control policy in the access network includes:

After obtaining the login information of the user, the RCEF determines, according to the saved topology information of the access network, the address information, the link information, and the service policy information of the user as the resource control policy;

And the processing for controlling and managing resources of nodes in the access network includes:

The access network resource control execution function entity sends the address information, the link information, and the service policy information of the user to each node, and controls the resource occupation of the user on each node.

In the present invention, when the user leaves the network, the method further includes:

The RCEF notifies the access network resource control execution function entity to send a resource release request;

The access network resource control execution function entity releases the corresponding resource according to the received request message, and returns a resource release success message to the RCEF.

The processing for determining the resource control policy in the access network specifically includes:

After the user logs in to the service, the application function AF sends the service policy of the service and the address information of the service provider point to the access network resource access control function A-RACF;

The A-RACF determines the service policy of the user according to the service policy of the service, and delivers the service policy of the service to the RCEF along with the user address information, as the resource control policy;

And the process of controlling and managing the resources of the nodes in the access network includes: the access network resource control execution function entity acquires a service policy that is sent by the RCEF according to the user address, and performs the user on each node of the access network. Update of the service strategy.

In the present invention, when the user leaves the service, the method further includes:

The AF sends the service policy information of the service requested by the user to the A-RACF, and the A-RACF sends a release resource request message to the RCEF;

The RCEF continues to deliver the release resource request message to the access network resource control execution function entity, and the access network resource control execution function entity updates the service policy of the user in each node of the access network according to the service policy of the service.

The invention also provides a multicast service control method, including:

On the access network resource control execution function entity, the multicast service replication function is started for the multicast service, and the user joins or leaves the multicast group; The initiated multicast service replication function is controlled and updated according to the joining or leaving of the user in the multicast group. The processing of recording the user joining or leaving the multicast group specifically includes:

When the access network resource control execution function entity receives the multicast service request message for the first time, it creates a counter for the multicast service, and when the user joins the multicast group, the counter is incremented by 1. When the user leaves the multicast group, The counter is decremented by 1.

The method further includes: the access network resource control execution function entity receives the multicast control signaling sent by the RCEF, and controls and manages the access network resources occupied by the multicast service according to the received multicast control signaling.

The present invention also provides a cluster service control method, including:

The access network resource control execution function entity creates a cluster group, and allocates a broadcast table for the corresponding cluster group to allocate reserved resources for each user;

The access network resource control execution function entity controls the access network user to perform the group service according to the allocated broadcast table and the reserved resource.

The method further includes:

The access network resource control execution function entity controls and manages the broadcast table and the resources occupied by each user according to the cluster control signaling received from the RCEF.

It can be seen from the technical solution provided by the present invention that the present invention provides an effective access network resource control management method and a corresponding system, and the user can guarantee the quality of service to the edge network, that is, can be in the network. End-to-end service quality assurance is provided, which provides corresponding technical support for operators to provide differentiated end-to-end services for users.

Thus, the implementation of the present invention enables the operational and manageability of a network of telecommunications and Internet convergence to be greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of an access network in the prior art;

2a is a schematic structural view of a system provided by the present invention;

2b is a schematic structural diagram of a specific implementation of the system provided by the present invention;

FIG. 3 is a schematic diagram of a specific implementation process of a user logging in to the network according to the present invention; FIG.

FIG. 4 is a schematic diagram of a specific implementation process of a swollen user login service;

FIG. 5 is a schematic diagram of a specific implementation process of a user leaving a network according to the present invention; FIG.

6 is a schematic diagram of a specific implementation process of a user leaving a service according to the present invention;

FIG. 7 is a schematic diagram of a specific implementation process of developing a multicast service according to the present invention.

Mode for carrying out the invention

The main purpose of the implementation of the present invention is to solve the network of telecommunications and Internet convergence, that is, the TISPAN network architecture has no The law controls the quality of service of the access network.

The core of the present invention is that a new functional entity, that is, an access network resource control execution function and a corresponding interface, is added to the system architecture of the TISPAN, and the access network resource control execution function is responsible for collecting topology information of the access network. And reporting to the RCEF (Resource Control Execution Function) through the corresponding interface, so that the RCEF can control and manage the access network based on the topology information of the access network to achieve the purpose of the present invention.

Specific implementations of the present invention will now be described with reference to the drawings.

As shown in FIG. 2a, the structure of the system provided by the present invention may specifically be:

In order to manage the quality of service of the access network, the system provided by the present invention modifies the architecture of the TISPAN into the following structure, and adds a new functional entity A-RCEF (AccessNode Resource Control Enforce Function) to the Access Node. The network resource control execution function) and a new interface Ra, which is the physical existence form of the logical interface Ra.

A - RCEF collects the topology information of all the nodes of the Access Node and reports them to the RCEF through the Ra interface. The RCEF can obtain the topology information of the entire access network according to the topology information reported by the A-RCEF, and also shields the topology of the access network from the A-RACF (access network resource access control function) to meet the control plane of the TISPAN. Requirements that are independent of the access network topology.

As shown in FIG. 2b, the specific implementation structures of A-RCEF and RCEF in the system provided by the present invention are as follows:

(1) A-RCEF includes topology information collection module and resource control policy execution module

The topology information collection module is configured to collect topology information of each node in the access network, and send the information to the RCEF entity through the interface;

The topology information collected by the A-RCEF includes but is not limited to at least one of the following information:

1. The connectivity of each node in the access network, the node includes a network element device of the access network, such as a DSLAM (Digital Subscriber Line Access Multiplexer), 0LT (Optical Line Terminal), etc.;

2. Port attributes, including port type and bandwidth;

3. Link information of the CPE in each node of the access network;

4. The communication address of each node in the access network.

And the resource control policy execution module is configured to receive a resource control policy or a resource control command delivered by the RCEF entity, and control and manage the resource of the node according to the resource control policy or the resource control command.

(2) The RCEF entity includes an access network topology information saving module and an access network topology control information processing module, and is used to save the access network sent by the access network resource control execution function entity. The topology information of each node is provided to the access network resource control policy processing module; At least one of the following information can be established on the RCEF:

1. The link information directly connected to the L2T Point (the Layer 2 node), which is referred to as link information, specifically refers to the link information of the user connected to the node;

2. Port attributes directly connected to RCEF and A-RCEF;

3. The relationship between the communication addresses of RCEF and A-RCEF;

In the above system, the A-RCEF needs to establish the link information of the user and the port attribute of the upper or lower node and the association relationship with the communication address of the upper and lower nodes respectively at each node of the access network. In this way, the control topology of the entire access network centered on the user's link address is established, so that the resource control management of the access network can be performed based on the topology.

In other words, after the topology information of the access network is established on the RCEF and the A-RCEF, the resources of the access network can be controlled and managed based on the topology information of the access network, including the user. Controlling and managing the resources of the access network in the process of logging in to the network, logging in to the service, leaving the service, leaving the network, carrying out the multicast service, and performing the cluster service, so that the service quality of the uplink service of the user can be guaranteed, thereby ensuring the user Provide end-to-end quality of service guarantees. ,

The specific implementation of the method in the present invention will be described below in conjunction with specific processing procedures. The specific application implementation processes are merely examples. The actual application of the present invention is not limited to the following specific processing procedures.

(1) User login network processing process '

As shown in FIG. 3, after the user logs in to the network, that is, after obtaining the address information and the service policy through network authentication in the NASS (Network Attachment Subsystem), the corresponding processing process includes:

Step 31: The NASS pushes the IP address of the user, the link information connected to the L2T Point, and the service policy of the user to the A-RACF through the e4 interface, where the service policy includes the service level, the contracted bandwidth, and the authorized Information such as access rights;

Step 32: A-RACF pushes the information to the RCEF through the Re interface;

Step 33: After obtaining the information of the user logging in to the network, the RCEF establishes the related information of the user according to the topology information reported by the A-RCEF, and sends some of the information to the A-RCEF;

Specifically, after obtaining the information of the user logging in to the network, the RCEF establishes and stores the user's IP address and link information, the user's service policy, and the port attribute directly connected to the A-RCEF and the communication thereof according to the topology information reported by the A-RCEF. The address is associated, and the user's IP address, link information, and service policy are sent to the A-RCEF through the Ra' interface. Step 34: A-RCEF performs initialization of the user login network;

Specifically: A-RCEF sends a service policy to each node according to the user's IP address and link information, and controls each node to allocate resources according to the service policy, and performs initialization of the user channel and setting a service policy; 35: After each node is successfully initialized, the A-RCEF returns to the RCEF and the access network user channel is successfully initialized; Step 36: The RCEF continues to return the user initialization success information to the A-RACF.

After the processing of the foregoing steps 31 to 36, the access network can control the flow of the user accessing the network according to the service policy obtained by the user logging in to the network, so that the uplink and downlink services of the user can be contracted when using the authentication. Bandwidth and service level.

(2) The process of users logging in to the business

As shown in FIG. 4, after the user logs in to the service, that is, after the user obtains the service policy of the service and the communication address of the service provider point through the service authentication in the AF, the corresponding processing process includes:

Step 41: The AF sends the service policy of the service applied by the user and the communication address of the service providing point to the A-RACF through the SPDF through Gq';

Step 42: The A-RACF checks the service policy of the service requested by the user, and updates the service policy of the user, for example, allocating reserved resources (or channels) according to the service policy of the service, updating the flow classification and filtering information of the user, and the like. And then sending the user's IP address, the service address of the service provider point, and the service policy to the RCEF;

Step 43: The RCEF finds the communication address of the A-RCEF corresponding to the user by the IP address of the user, and sends the service policy of the service to the A-RCEF of the access network through Ra';

Step 44: A-RCEF updates the service policy of the user in each node of the access network according to the service policy of the service and the link information of the user.

Through the above process, the service service policy is delivered and executed in the access network, thereby solving the problem that the service quality of the access network from the user to the IP Edge cannot be guaranteed.

(3) The process of the user leaving the business

As shown in Figure 5, after the user leaves the service, that is, the user stops using the service provided by the AF, and the AF needs to revoke the service policy assigned to the user service, the corresponding process is as follows - Step 51: AF passes Gq, and the interface will revoke the service. The message of the service service policy applied by the user and the communication address of the service provider point is sent to the A-RACF via the SPDF;

Step 52: The A-RACF checks the current state of the user, determines the resource information agreed by the service policy that the user is still using, and sends the IP address of the corresponding user, the communication address of the service provider point, and the service policy information to the RCEF. 53: RCEF finds the communication address of the A-RCEF corresponding to the user by the user's IP address, and passes Ra, which will be required The service policy of the service to be revoked is delivered to the A-RCEF of the access network;

Step 54: The A-RCEF updates the service policy of the user in each node of the access network according to the service policy of the service and the link information of the user, so as to implement the resource allocated to the user by the service service policy.

When the SPDF or the A-RACF detects that the resource allocated to the user needs to be revoked, it also needs to notify the RCEF to revoke the resource allocated to the user through the Re interface. The specific processing flow is the same as the processing shown in FIG. 5, so no longer ^ - Said.

(4) The process of the user leaving the network

As shown in Figure 6, after the user leaves the network, the corresponding processing process includes:

Step 61: The NASS notifies the A-RACF of the offline information and the workP address of the user by the e4 interface;

Step 62: The A-RACF notifies the SPDF and the RCEF of the user's offline information, and the SPDF and the RCEF release and recycle the resources;

Step 63: The RCEF checks the resources that the user has allocated, and the Ra interface notifies the A-RCEF to allocate all resources to the user to all the service policies of the user.

Step 64: After the A-RCEF recovers the resources successfully, notify the RCEF user that the resource recovery is successful;

Step 65: The RCEF continues to notify the NASS of the user resource recovery success message.

After the above processing, the A-RACF and the NASS can learn that the resources allocated to the user are all released and the resources allocated to the user are locally recovered.

(5) Process of carrying out multicast services

The difference between a multicast service and a unicast service is that a multicast service replicates packets in a multicast spanning tree segment by segment. When multiple users on the same access network join the same multicast group, The access network is required to provide a multicast relay function for message replication and resource allocation for users joining the same multicast group.

The delivery of the service policy of the multicast service and the resource allocation process are basically the same as the unicast process. The difference is that the SPDF and the A-RACF need to identify the service request of the multicast group to initiate the replication function of the transport layer and the resources allocated to the user are shared. The resources of the uplink channel and the channel of the user to the RCEF or C-BGF are exclusive, that is, the resources of the shared uplink channel are realized by the copy function.

As shown in Figure 7, the processing of the specific multicast service includes:

Step 71: The A-RACF receives the service policy and resource allocation request of the multicast service for the first time, and creates a counter for it, and allocates a reserved (or shared) resource to the user whenever a user joins the multicast group. And the count is increased by 1;

Step 72: At the same time as step 71, the multicast message copying function of the RCEF needs to be started on the A-RCEF, and the multicast message can be copied to the reserved (or shared) channel of the user. Step 73: When the user leaves the multicast group, the reserved (or shared) resource allocated to the user is recovered, and the multicast message copy function of the RCEF is updated to delete the copy information of the user.

Step 74: When there is no user in the multicast group, the replication function of the multicast group of the RCEF is turned off.

When multiple users on the access network join the same multicast group, the RCEF is notified by Ra, the interface notifies the A-RCEF to create a multicast group counter and initiates the replication function of the multicast group, and the multicast group counter and multicast replication function. The management process is the same as that on the RCEF, so it will not be detailed.

(6) Carrying out the process of cluster business

The difference between the cluster service and the multicast service is that the users of the cluster service are passively accepted, and the users of the multicast service need to initiate the initiative. Therefore, the users of the cluster service also need to log in to the service request service policy and resource allocation.

Both SPDF and A-RACF need to identify the cluster group creation request sent by the user. In the process of creating the reserved channel, a broadcast table needs to be created for each cluster group, and whenever a user joins the cluster group. When the user is allocated reserved resources (or shared resources) and the user is added to the attribute table, the RCEF is notified to add a broadcast table. When one user obtains the sending capability of the cluster service, the RCEF will receive the message received from the user. All users in the cluster are copied to the cluster group. When a user leaves the cluster group, the user is deleted from the attribute table (that is, the broadcast table), and the exclusive resource of the user is released, and the RCEF is notified to update the broadcast table.

To make more efficient use of clustering capabilities, RCEFs need the ability to allocate reserved channels (or shared channels) shared by multiple users and the ability to replicate cluster group data to that channel.

When the access network has more than one user joining the same cluster group, the RCEF needs to notify the A-RCEF to create a broadcast table of the cluster group through the Ra' interface, and copy the attribute table from the RCEF and allocate a reservation (or share) to the user. ) Resources (or channels). The processing flow of A-RCEF for cluster user-initiated packets and cluster user management is the same as that used on RCEF. It also needs the ability of multiple cluster users to allocate shared channels.

In summary, the implementation of the present invention provides an effective implementation solution for managing and controlling an access network system. The access network resource control implementation solution provided by the present invention can solve the problem that the service quality of the user to the IP Edge cannot be controlled. Achieve end-to-end service quality assurance for users.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A system for implementing access network control, comprising an access network and an IP edge, wherein the access network is provided with an access network resource control execution function entity, and the access network resource The control execution function entity provides an interface for communicating with the resource control execution function RCEF entity in the IP edge, and the access network resource control execution function entity of the interface reports the collected topology information of the access network to the RCEF entity. And receiving the resource control policy delivered by the RCEF entity, and controlling the resources of each node.

2. The system for implementing access network control according to claim 1, wherein the access network resource control execution function entity comprises a topology information collection module and a resource control policy execution module, where:

The system for implementing access network control according to claim 1, wherein the topology information comprises: connectivity of each node in the access network, port attributes, and nodes of the user equipment in the access network. Link information and/or the communication address of each node in the access network.

The system for implementing access network control according to claim 1, 2 or 3, wherein the RCEF entity comprises an access network topology information saving module and an access network resource control policy processing module, wherein:

The system for implementing access network control according to claim 4, wherein the information stored by the access network topology information saving module includes at least one of the following information determined according to topology information of each node- The link information of the user directly connected to the Layer 2 node, the port attribute directly connected between the RCEF and the access network resource control execution function entity, and the association relationship between the RCEF and the communication address of the access network resource control execution function entity.

6. A method for implementing access network control, characterized in that:

The RCEF entity determines the resource control policy in the access network according to the topology information of the access network, and sends the resource control policy to the access network resource control execution function entity; The access network resource control execution function entity controls and manages resources of nodes in the access network according to the resource control policy.

The method for implementing access network control according to claim 6, wherein the topology information of the access network includes: connectivity, port attributes, and user equipment access of each node in the access network. Link information of each node of the network and/or communication address information of each node in the access network.

The method for implementing access network control according to claim 6 or 7, wherein when the user logs in to the network, the process of determining the resource control policy in the access network specifically includes:

The access network resource control execution function entity sends the user's address information, link information, and service policy information to each node, and controls the resources of the user on each node.

The method for implementing access network control according to claim 8, wherein when the user leaves the network, the method further includes:

The method for implementing the access network control according to claim 6 or 7, wherein the processing of determining the resource control policy in the access network specifically includes: after the user logs in to the service, the application function AF is connected. The network resource access control function A-RACF sends the service policy of the service and the address information of the service provider point;

A _{: The} RACF determines the service policy of the user according to the service policy of the service, and delivers the service policy of the service to the RCEF along with the user address information, as the resource control policy;

The access network resource control execution function entity obtains the service policy delivered by the RCEF according to the user address, and updates the service policy of the user in each node of the access network.

The method for implementing access control according to claim 10, wherein when the user leaves the service, the method further includes:

The AF sends the service policy information of the service that is requested by the user to the A-RACF, and the A-RACF sends the release to the RCEF. Resource request message

12. A multicast service control method, comprising:

On the access network resource control execution function entity, the multicast service replication function is started for the multicast service, and the user joins or leaves the multicast group;

The initiated multicast service replication function is controlled and updated according to the joining or leaving of the user in the multicast group.

The method for controlling the multicast service according to claim 12, wherein the processing of recording the user joining or leaving the multicast group specifically includes:

The multicast service control method according to claim 12 or 13, wherein the method further comprises: the access network resource control execution function entity receiving the multicast control signaling sent by the RCEF, and receiving according to The multicast control signaling to the control and management of the access network resources occupied by the multicast service.

15. A cluster service control method, characterized by Li Yu, comprising:

The cluster service control method according to claim 15, wherein the method further comprises: the access network resource control execution function entity according to the cluster control signaling received from the RCEF to the broadcast table and The resources occupied by each user are controlled and managed.