WO2007104264A1

WO2007104264A1 - A session control system, method, and session identifier allocation apparatus thereof in an access network

Info

Publication number: WO2007104264A1
Application number: PCT/CN2007/000851
Authority: WO
Inventors: Weilong Ouyang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-03-16
Filing date: 2007-03-16
Publication date: 2007-09-20

Abstract

A session control method includes: allocating the corresponding second layer session identifier to the service which the user subscribes or visits, wherein, the said second layer session identifier is the second layer information which identifies the second layer session; controlling the service session resource according to the said second layer session identifier. A session identifier allocation apparatus includes: a register request receiving unit, for receiving the register request of user's second layer session capability; an allocation unit, for allocating the corresponding second layer session identifier to the service which the user subscribes or visits; a sending unit, for sending the user information and the said second layer session identifier. A session control system includes: an allocation unit, for allocating the corresponding second layer session identifier to the service which the user subscribes or visits, wherein, the said second layer session is the second layer information which identifies the second layer session; a resource control unit, for controlling the service session resource according to the said second layer session identifier.

Description

^ "Control system, method and ^^ identification device for access network" This application is required to be submitted to the Chinese Patent Office on March 16, 2006 and March 27, 2006, respectively. The application numbers are 200610058565.0, 200610067401.4, respectively. The priority of the Chinese Patent Application for "Access Network Control System and Method Unrelated to Service", "A Access Network Session Control System and Method" is hereby incorporated by reference in its entirety.

Technical field

The present invention relates to an access network technology for a next generation network, and more particularly to a session control system, method and session identification allocation device for an access network.

Background technique

The International Telecommunication Standardization Institute (ETSI) and the International Telecommunication Standardization Sector (ITU-T) and other international standardization organizations all believe that the next-generation telecommunication network is built on the Internet Protocol (IP) or packet-switched network. With the continuous development of technology, the technology trend of providing triple play (telecom network, computer network, cable television (CATV) network) on IP has become increasingly apparent. However, since the original design of the IP network is only to solve the interconnection problem of devices located in different places, it is extremely open. It is also because of its openness that Internet technology has been able to grow in a short period of ten years. It has already spread to the family and has become an indispensable part of people's daily life and work. However, for the current communication technology, its openness and only the ability to provide interconnection, but can not guarantee the quality of service of the service and the security of users accessing the network.

The telecom network, such as the PSTN (Public Switched Telephone Network), is a closed system. After decades of continuous evolution, it has developed into an intelligent network, digital data network (DDN, Digital Data Network). For multi-service networks, it is clear that its security and reliable service quality have also gained wide consensus. However, due to its own technical problems, it is unable to provide broadband services like the Internet.

Therefore, the problem that the next generation telecommunication network faces to solve is to provide reliable quality of service like PSTN, and the last "one kilometer" that plagues the development of broadband also has the problem of quality of service, because the access network has a large convergence ratio. In order to achieve reliable service quality, it is necessary to carry out technical transformation of this "one kilometer", that is, to transform the access network of the metropolitan area network.

At present, in order to solve the above problems, Telecom and Internet Integration Services and Advanced Network Association under ETSI The organization (TISPAN, Telecommunications and Internet Converged Services and Protocols for Advanced Networking) adopts the network structure shown in FIG. 1 to perform Quality of Service (QoS) control on the IP edge device (IP Edge) 11 and later. The network attached subsystem (NASS) is responsible for managing the processing related to the user connection, such as authentication, address allocation, and link of the user access; the access node 13 (AN, Access Node) is responsible for providing user access. The network, that is, the customer terminal 18 (CPE, Customer Premises Equipment) registers with the access network, for example, a digital subscriber line access multiplexer (DSL, digital subscriber line access multiplexer), etc. The access network admission function 14 (A-RACF, Access Resource Admission Control Function) is responsible for the service requirements based on user information such as ASS12 and service-based policy decision function (SPDF). The policy controls the Resource Control Enforce Function 16 (RCEF); RCEF16 is responsible for controlling the resource allocation and policy delivery of the transport layer; SPDF15 obtains the resource allocation requirements and policies of the service layer from the Gq, interface, and distributes these to A-RACF14 and Core Edge Gateway Features 17 (C-BGF, Core Bord The er Gateway Function ); The C-BGF 17 is responsible for performing resource allocation requirements and policies issued from the SPDF 15 and reporting the status of the monitoring resources to the SPDF 15 . As shown, TISPA's Bearer Control Subsystem, RACS (including A-RACF and SPDF) leaves only one logical interface to the access network, without detailed description of the protocol and functionality of the logical interface. Access networks such as DSL aggregate the traffic of a large number of users to IP Edgel for Layer 2 termination and provision of services, and the control system (A-RACF and SPDF) through TISPAN can solve the problem from IP Edge to IP Edge. The amount of service shield, but because the standard has not given the specific protocol and function of the Ra interface, it can not solve the quality of service from the user to the IP Edge.

In addition, because TISPAN's existing system lacks the functions and requirements of the Ra interface (the standard has not yet been given), the access network's topology information cannot be obtained, and the quality of service from the user to the IP Edge cannot be guaranteed.

Although the widely used asymmetric digital subscriber (ADSL) access technology adopts a traffic model with small uplink bandwidth and large downlink bandwidth, the uplink quality of service problem can be partially solved by the differential monthly service mode. But with emerging access technologies such as Gigabit Passive Optical Network (GPON), symmetric high-speed digital subscriber lines ( SH.DSL, symmetrical high - data - rate digital subscriber line ), etc., which adopts a traffic model with little difference in uplink and downlink bandwidth, the above-mentioned service quality problem between users and IP Edge is particularly prominent.

Therefore, in addition to the inability to provide end-to-end quality of service, the above technologies cannot utilize the upstream bandwidth of the emerging access technology to provide services to users more efficiently.

Please also refer to FIG. 2, which is a schematic diagram of the service call process of the TISPAN access network. As shown in Figure 2, the bearer control consists of A-RACF and SPDF. The service interacts with the bearer control through the Gq or Gq (not shown) interface. The IP Edge interacts with the AN through Ra or other interfaces. The user gateway (CNG) may be a part of the access network or a part of the user terminal, and is responsible for establishing a network connection between the user terminal and the AN.

The service connection process is as follows: 1. The user terminal equipment CPE registers with the service layer; 2. The user terminal equipment initiates a service call to the service layer; 3. The user terminal equipment negotiates the resources required for the session with the service layer; 4. The service layer bearer control Requesting session resource reservation; 5. Bearer control and IP Edge negotiation session resource reservation; 6. The bearer control notifies the service layer that the resource reservation is successful; 7. The service end notifies the user terminal device to allow the service connection; 8. The service connection.

It can be seen from the above that in the existing standard process, the service call is initiated by simply registering, and the reservation of the session resource only involves the IP edge device, and the access quality network is not subject to QoS control. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a session control system, method, and session identifier allocation apparatus for an access network, so as to solve the problem that the current TISPAN network architecture cannot control the quality of service of the access network.

The technical problem to be solved by the embodiment of the present invention is to provide a session identifier allocation apparatus for an access network, which solves the problem that the current layer scheme cannot pre-allocate a layer 2 session identifier for a service subscribed or accessed by a user.

To solve the above technical problem, an embodiment of the present invention provides a session control method for an access network, where the method includes the following steps:

Assigning a corresponding Layer 2 session identifier to the service that the user subscribes to or accesses, where the Layer 2 session identifier is the second layer information that identifies the Layer 2 session;

Controlling resources of the service session according to the layer 2 session identifier. In addition, the embodiment of the present invention further provides a session identifier allocation apparatus, where the apparatus includes: a registration request receiving unit, configured to receive a registration request of a user's Layer 2 session capability;

An allocation unit, configured to allocate a corresponding Layer 2 session identifier for the service that is subscribed or accessed by the user, where the Layer 2 session identifier is Layer 2 information that identifies the Layer 2 session;

And a sending unit, configured to send the user information and the layer 2 session identifier.

In addition, the embodiment of the present invention further provides a session control system for an access network, where the system includes: an allocating unit, configured to allocate a corresponding layer 2 session identifier to a service that is subscribed or accessed by the user, where the second layer The session identifier is Layer 2 information that identifies the Layer 2 session.

a resource control unit, configured to control resources of the service session according to the layer 2 session identifier.

It can be seen from the above technical solution that the embodiment of the present invention identifies the service session by using the layer 2 information, and then dynamically negotiates the layer 2 tongue between the user and the network affiliate subsystem NASS, and finally controls the resources of the service session through the layer 2 session. The QoS control of the access network is simplified by managing the resources allocated to the user by the logical connection of the Layer 2 session.

DRAWINGS

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

2 is a schematic diagram of a service call process of a TISPAN access network system in the prior art;

3 is a schematic structural diagram of a session control system of an access network according to an embodiment of the present invention;

4 is a schematic structural diagram of a session control system of an access network according to a first embodiment of the present invention; FIG. 5 is a schematic structural diagram of a session control system of an access network according to a second embodiment of the present invention; 3 is a schematic structural diagram of a session control system of an access network according to a third embodiment; FIG. 8 is a schematic structural diagram of a session identifier allocation apparatus of an access network according to a fourth embodiment of the present invention; FIG. 8 is an access diagram according to an embodiment of the present invention; Flow chart of a method of web session control;

FIG. 9 is a flowchart of a method for controlling session control of an access network according to a fifth embodiment of the present invention;

FIG. 10 is a flowchart of a method for controlling session control of an access network according to a sixth embodiment of the present invention; FIG. 11 is a flowchart of a method for session control of an access network according to a seventh embodiment of the present invention.

detailed description

In order to implement the quality of service QoS control of the access network, the embodiment of the present invention introduces the concept of "two-layer session". "Layer 2, for the IP layer (three layers or business layer), that is, the part of the stack between the IP layer and the physical layer, the asynchronous transfer mode ( ATM) Permanent virtual circuit connection (PVC) layer, Ethernet medium access control layer MAC, etc.

The "two-layer session" refers to a session that can be indexed by one or more layers of information during a session connection. In order to implement a Layer 2 session from a user to an IP edge device, a Layer 2 connection is required. Negotiate the Layer 2 information distribution of any network device in the network between the user and the IP Edge to determine a point-to-point connection. The Layer 2 information index includes Virtual Local Access Network (VLAN) and Media Control Access (MAC). Medium Access Control and other Layer 2 information, and the Layer 2 information that identifies the Layer 2 session is called the “Layer 2 Session Identifier.” “Business Session, refers to the session directly managed by the business layer, and its identity becomes the “Business Session ID”. ,,,, the service session identifier is also an index of all the flow information and quality of service of the session, and is guaranteed to be unique throughout the bearer control layer.

In order to enable the Layer 2 information to identify the session, the embodiment of the present invention may use the original Layer 2 information or add new Layer 2 information or replace the original Layer 2 information to identify the session. The layer information may include the service type of the session, the priority of the session, and the like, or may include any one or any combination of the service type and the priority of the session, but is not limited thereto, and may be other attributes. Facilitate access nodes AN makes the most complete QoS control possible. Take the Ethernet AN as an example. You can add one or more layers of VLAN IDs to identify the session in the original VLAN. The P bit of the VLAN is the priority of the session. Or session VLAN.

The invention will now be further described with reference to the accompanying drawings.

Referring to FIG. 3, it is a schematic structural diagram of a session control system of an access network according to an embodiment of the present invention. The system includes: an allocating unit 31, a session establishing unit 32, a resource control unit 33, and a mapping establishing unit 34. The allocating unit 31 is configured to allocate a corresponding layer 2 session identifier to the service that the user subscribes to or accesses, where the layer 2 session identifier is the second layer information that identifies the layer 2 session; the session establishing unit 32 uses The Layer 2 session and attributes are established based on the received user information and the Layer 2 session identifier. The resource control unit 33 is configured to control resources of the service session according to the layer 2 session identifier. The mapping establishing unit 34 is configured to allocate reserved resources for the Layer 2 session and the service session, and establish a mapping of the Layer 2 session to the service session.

The allocating unit 31 includes: a registration request receiving sub-unit 311, configured to receive a registration request of a user's Layer 2 session capability; and a static allocation sub-unit 312 connected to the registration request receiving sub-unit 311 for signing or accessing the user. The business passes pre-planning information or service level and its corresponding planning target The two-layer session identifier corresponding to the service is directly allocated; the session identifier sending sub-unit 313 is connected to the static allocation sub-unit 312, and is configured to send the layer-layer session identifier corresponding to the service. The obtaining sub-unit 314 is connected to the registration request receiving sub-unit 311 and the session identifier sending sub-unit 313, respectively, for dynamically acquiring the corresponding two-layer session identifier from the service to the bearer control subsystem for the service subscribed or accessed by the user.

The resource control unit 33 includes: a receiving subunit 331 coupled to the session identifier sending subunit 313 for receiving user information and a resource reservation request; a check sending subunit 332 connected to the receiving subunit 331 for checking the The second layer session identifier corresponding to the user information, and the resource control of the layer 2 session and the service session is initiated to the IP edge device; the resource control subunit 333 is connected to the check sending subunit 332, and configured to use the layer 2 session identifier and the attribute according to the Control Layer 2 sessions and resource reservation.

For the embodiment of the present invention, the allocating unit 31 and the session establishing unit 32 may be integrated in the network auxiliary subsystem, or may be integrated in the automatic configuration server or the service server; the control unit 33 and the mapping establishing unit 34 may be integrated in the In the bearer control subsystem.

In addition, the system in the embodiment of the present invention further includes one or more of a user terminal, a transport layer device, or a service server. The user terminal is coupled to a network accessory subsystem or an automatic configuration server; the user terminal includes: a service end and a user gateway; the user gateway is used to establish and maintain an IP connection connected to the access network; The service end is used to terminate the service and the IP connection provided by the user gateway to transmit the service data. The transport layer device is coupled to the bearer control subsystem, and includes at least an access node device and an IP edge device; the access node device is configured to complete Layer 2 session resource reservation and attribute update; The mapping between the Layer 2 session and the service session is established after the access node device completes the resource reservation. The service server interacts with the user terminal, the automatic configuration server, and the bearer control subsystem, and is configured to receive user information transmitted by the automatic configuration server, and send a call request to the user terminal to send to the bearer control subsystem. Resource reservation application.

In order to facilitate the understanding of those skilled in the art, the present invention will be described in detail below with reference to specific embodiments. Referring to FIG. 4, it is a schematic structural diagram of a session control system of an access network according to a first embodiment of the present invention. In this embodiment, the allocation unit is integrated in a network attached subsystem (NASS), and the resource control unit is integrated. In the Load Control Subsystem (RACS). As shown in FIG. 4, the access network system with Layer 2 session management capability according to the embodiment of the present invention mainly includes a network attached subsystem (NASS) 31, a bearer control subsystem (RACS) 42, and an embodiment of the present invention uses NASS and RACS is an example, but not Limited to this. The network accessory subsystem 41 is connected to the bearer control subsystem 42 and implements information interaction through the e4 interface. The network accessory subsystem 41 receives the registration request of the user's Layer 2 session capability, and assigns a layer 2 session identifier to the user according to the service of the user; and the bearer control subsystem 42 negotiates the layer 2 session identifier with the network accessory subsystem 41, and receives The network subsystem sends 41 user information and Layer 2 session identifiers, and sets Layer 2 sessions and resource allocation according to the Layer 2 session identifier and the user's priority.

The bearer control subsystem RACS further includes: an access resource admission function A-RACF, a service policy decision function SPDF, a resource control execution function RCEF, and a core edge gateway function C-BGF (not shown). The functions of the various parts are the same as those of the prior art, and are not described here.

In addition, the access network system with Layer 2 session management capability according to the embodiment of the present invention further includes a user terminal device 43 and a transport layer device 44. The user terminal device 43 includes a service end 431 (TE, Terminate Equipment) and a user gateway 432 (CNG, Custom Network Gateway); the user gateway is responsible for establishing and maintaining an IP connected to the access network (AN). The service terminal 431 is configured to be responsible for terminating the service and transmitting the service data by the IP connection provided by the user gateway 432. The transport layer device 34 includes at least an access node device 441 and an IP edge device 442, which also implements information interaction through the Ra interface or other interfaces.

In addition, the access network system with the layer 2 session management capability of the embodiment of the present invention further includes a service layer device 45, which implements information interaction with the bearer control subsystem 42 through the Gq interface, and receives the call of the user. After the request, a resource reservation request is issued to the bearer control subsystem.

Referring to FIG. 5, it is a schematic structural diagram of an access network session control system according to a second embodiment of the present invention. In this embodiment, the AN of the Ethernet is taken as an example, but the present invention is not limited thereto, and other networks may be taken as an example. The distribution unit is integrated in the automatic configuration server, and the resource control system is integrated in the bearer control subunit as an example. In this embodiment, the system includes: a user terminal device 51 (CPE), an automatic configuration server 52 (ACS), a service server 53, a bearer control subsystem 54 (RACS), and a transport (Transport Layer) device. 55.

The RACS 54 includes: a service policy-based decision function SPDF 541, an access resource admission function A-RACF 542; the transport layer device 55 includes: an access node device AN551, an IP edge device IP Edge 5552, and a core edge node 553 (Core Border Node ). The service server 53 interacts with the RACS 54 through the Gq, or Gq interface; the RACS 54 passes the La, Re, Ra interface and Transprt The Layer device 55 interacts; the ACS 52 can perform signaling transmission with the service server 53 and the bearer control subsystem 54; the user terminal 51 is composed of two parts: a service end 511 (TE) and a user gateway 512 (CNG), and the user gateway 512 (may be only The software module of TE that implements the IP protocol is responsible for establishing and maintaining an IP connection connected to the access node AN, and the service end 511 is responsible for terminating the service and transmitting the service data by the IP connection provided by the user gateway.

The system in this embodiment may add one or more VLAN id insertion frames to identify the session in the virtual local area network VLAN frame format of the original data packet, and the P bit of the VLAN is used as the priority of the session. Business or session VLAN.

The user gateway CNG512 simultaneously negotiates the capability of the "layer 2 session" in the process of registering with the ACS 52 (here, the process of registering IP connectivity such as authentication and address assignment necessary for the login network); the ACS transmits the user information to the service. The server is configured to apply for a Layer 2 session identifier to the bearer control subsystem 54. The bearer control subsystem 54 allocates a corresponding Layer 2 session identifier according to the service of the user, and then the ACS 52 identifies the Layer 2 session corresponding to the service in the registration response message. Or push directly to CNG512.

After the user successfully registers with the ACS 52, the bearer control subsystem 52 and the service server 53 are notified that the user has been registered in the network, and the RACS 54 finds the corresponding IP Edge 53 and the AN device 51 according to the user's IP address, logical link ID, and the like. The layer session ID and the user's default priority set the Layer 2 session and resource allocation;

After the CNG 512 obtains the Layer 2 session identifier corresponding to the service and its corresponding policy (bandwidth, delay, gating, etc.), when the TE 511 registers with the CNG 511 and applies for an IP connection, the CNG 511 is based on the type of service provided by the TE. The link between the link and the physical information and the policy of the Layer 2 session establishes a mapping of the Layer 2 session corresponding to the Layer 2 session identifier of the service. For example, when a TE uses IP1 to provide services, the CNG simply follows the IP1. The IP data stream is mapped to the IP data stream of the Layer 2 session. If a TE provides multiple services at the same time, the user gateway maps the service to the corresponding Layer 2 tongue according to the Layer 2 session identifier of the service, and the user gateway pairs The content of the layer is not processed, and it is directly transmitted.

After the user terminal 51 initiates a service call, the service server 53 sends an application for resource reservation to the bearer control subsystem 54. The bearer control checks the Layer 2 session identifier corresponding to the IP of the user, and initiates a Layer 2 session and a service session to the IP Edge. Resource reservation; the IP Edge initiates a resource reservation application to the AN according to the IP address and the Layer 2 session identifier; After the resource reservation is completed on the AN551 (CNG), the IP Edge 552 establishes a mapping from the Layer 2 session to the service session after the Layer 2 session and the service session successfully allocate the reserved resources. After that, the bearer control transmits the signaling of the resource reservation success to the service network, and the service is allowed to connect.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of an access network session control system according to a third embodiment of the present invention. In this embodiment, the allocation unit is integrated in the service server, and the resource control unit is integrated in the bearer control subsystem as an example. The system includes: a service server 61, a bearer control subsystem 62, a user terminal 63, and a transport layer device 64.

The service server 61 is configured to negotiate a resource required for a session with a user, and perform a negotiation of a layer 2 session. The bearer control subsystem 62 is configured to receive a resource reservation application of the service session initiated by the service server, and simultaneously initiate the second The resource reservation of the layer session enables the resource reservation of the service session of the access network through the layer 2 session. A policy based decision function 621 and an access resource admission function 622 are included. The user terminal 63 carries the Layer 2 session capability supported by the user in the registration message, and negotiates the Layer 2 session capability with the service server. Includes Home Gateway 631. The transport layer device 64 interacts with the user terminal 63 and the bearer control subsystem 62 to establish a mapping relationship between the layer 2 session and the service session, and returns a resource reservation success to the load control subsystem 62. The layer device 64 includes at least an access node device 641, an IP edge device 642, and a core edge node 643, the access node device 641 and the IP edge device 642 interacting through the Ra interface.

Since the user terminal CPE 63 needs to traverse the user gateways CNG631 and AN641, it is necessary to confirm whether the CNG and the AN can support the traversal of the Layer 2 session and the corresponding resource reservation processing. In the process of registering the CPE 63 with the service server 61, the second layer needs to be performed. Negotiation of session capability determines that Layer 2 session capability is available from CPE63 and IP Edge642 (of course, the Layer 2 session capability of IP Edge and AN641 can be determined through static configuration, and the following negotiation process is ignored, and the user is directly notified of the specific secondary session capability). The general process is as follows:

The CPE registration message carries the Layer 2 session capability supported by the CPE, for example, the added VLAN is used as the session identifier, the specific number of layers, and other related information. The service server authenticates the user and passes the Layer 2 session of the IP Edge and the AN. The capability, in the message of the registration response, notifies the user terminal to adopt a specific layer 2 session capability (for example, adding a VLAN as a layer 2 session identifier) and a test session identification number (for example, VLAN 100); the service server determines that the user terminal has already After selecting the corresponding Layer 2 session capability, notify IP Edge to initiate the corresponding "Layer 2 test session", IP Edge notifies AN (also It may include CNG. Set the information of the Layer 2 test session. After successful, the IP Edge sends a loopback to the Layer 2 test session. The test packet (of course, the service server can also be initiated). Once the CPE is sent back to the loopback, the test is performed. The message responds to the service server with the ability to have a Layer 2 session between the IP Edge and the CPE. The service server notifies the user that the registration is successful, after which the user can initiate a business call. The process of initiating a service call at the user terminal is the same as the original one, but the subsequent processing needs to be modified: Negotiate the Layer 2 session identifier while negotiating the resources required for the session and ensure that it is unique in the IP Edge and AN (here It can be implemented through a single-layer session identification plan. For example, no service has its own Layer 2 session space. You can also use the service session ID as a part of the Layer 2 session ID. You can directly use the service session ID as the second layer. The primary component of the session identifier is even indexed; the service server initiates resource reservation (Layer 3) to the bearer control subsystem and initiates resource reservation of the Layer 2 session; the IP Edge initiates the second of the AN while allocating the resources of the service session. The resource reservation of the layer session (when the CNG of the user terminal is part of the AN, the AN also needs to initiate the CNG Layer 2 session resource reservation process); after the AN resource reservation is successful, the IP Edge establishes a Layer 2 session to the service session. Mapping relationship, returning resource reservation success to the bearer control subsystem; carrying control subsystem to the service server The feedback resource is successfully reserved. The service server notifies the user terminal of the success of the service connection and the Layer 2 session information. Thereafter, the user exchanges service data on the Layer 2 session. The AN (CNG) performs service flow control according to the resources of the Layer 2 session. IP Edge Realize data forwarding between Layer 2 and business sessions.

The access network session control system in this embodiment may proxy (Proxy) or relay (Relay) to the service interaction of the user terminal through a user gateway (CNG, Custom Network Gateway) or a home gateway (RG, Residential Gateway) instead of the user. The terminal performs the above process processing. The implementation principle is the same as the above, as described above, and will not be described here.

In addition, the fourth embodiment of the present invention further provides a session control apparatus for an access network, which is shown in FIG. 7. The apparatus includes: a registration request receiving unit 71, an allocating unit 72, a sending unit 73, and/or acquiring Unit 74 (shown in dashed lines in the figure). The registration request receiving unit 71 is configured to receive a registration request of a layer 2 session capability of the user, and the allocation unit 72 is configured to allocate a corresponding layer 2 session identifier for the service subscribed or accessed by the user, where The Layer 2 session identifier is used to identify Layer 2 information of the Layer 2 session. The sending unit 73 is configured to send the user information and the Layer 2 session identifier. The obtaining unit 74 is configured to dynamically obtain a corresponding Layer 2 session identifier from the service to the bearer control subsystem for the service that the user subscribes to or accesses. The device in this embodiment may be integrated in the network accessory subsystem, the automatic configuration server, or the service server. It can also be integrated into other devices or systems, and the specific implementation thereof is described in detail in the above process, and details are not described herein again.

Correspondingly, the embodiment of the present invention further provides a method for access network session control, and a flowchart thereof is shown in FIG. 8. Includes:

Step S811: Assign a corresponding Layer 2 session identifier to the service that the user subscribes to or accesses, where the Layer 2 session identifier is the Layer 2 information that identifies the Layer 2 session.

Step S812: Control resources of the service session according to the Layer 2 session identifier.

In the embodiment of the present invention, the original layer 2 information is used, the new layer 2 information is added to the original layer 2 information, or the original layer 2 information is replaced to identify the layer 2 session. The Layer 2 information can be used as an index to identify the type of service of the session and/or the priority of the session. It can also be Layer 2 information such as virtual LAN or media access control.

In this embodiment, the entity that allocates the corresponding Layer 2 session identifier for the service that the user subscribes to or accesses may be: a network accessory subsystem NASS, an automatic configuration server ACS, or a service server, which are respectively described below.

FIG. 9 is a flowchart of a method for controlling a session of an access network according to a fifth embodiment of the present invention. In this embodiment, the network accessory subsystem NASS allocates a corresponding layer to a service that is subscribed or accessed by a user. Session ID. The specific implementation process is: using two layers of information to identify the session; the user and the network affiliated subsystem NASS dynamically negotiate a Layer 2 session; that is, assigning a Layer 2 session identifier to the service for signing up the subscription or access, and The Layer 2 session identifier establishes a Layer 2 session and default attributes. The Layer 2 session implements resource reservation for the service session of the access network.

As shown in Figure 9, in order to implement the "two-layer session," negotiation, the user needs to make the following modifications when registering with the network subsystem:

The user gateway CNG registers its own "layer 2 session" capability (label 1) in the process of registering with the NASS (here, the process of registering IP connectivity such as authentication and address assignment necessary for logging in to the network); Based on the service that the user subscribes to or accesses, the NASS uses the Layer 2 information to identify the session, and directly allocates or applies to the bearer control subsystem to allocate the corresponding Layer 2 session identifier (label 2.1) according to the planned information. The second layer session corresponding to the service is identified in the registration response message or directly sent to the CNG (label 2.2); when the user successfully registers, the network subordinate The system pushes (PUSH) user information and the layer 2 session identifier to the bearer control subsystem (reference 2.3) to notify the bearer control subsystem RACS that the user has registered to the network, and the RACS is based on the user's IP address, logical link ID, and the like. Find the corresponding IP Edge and AN device, establish a Layer 2 session and default attributes (labels 3, 4), and then set the Layer 2 session ID and the user's default priority to set the Layer 2 session and resource allocation.

After the CNG obtains the Layer 2 session identifier corresponding to the service and its corresponding policy (bandwidth, delay, gating, etc.), when the TE registers with the CNG and applies for an IP connection, the CNG is based on the type of service provided by the TE. Any one or any combination of the information such as the link or the physical and the policy of the Layer 2 session, and then the mapping of the Layer 2 session corresponding to the Layer 2 session identifier of the service is established. For example, when a TE uses IP1 to provide services, the CNG simply maps the IP data stream of IP1 to the IP data stream of the Layer 2 session. If a TE provides multiple services at the same time, the CNG directly feeds back the service provided by the TE and the corresponding Layer 2 session identifier to the TE. The TE maps the service to the corresponding Layer 2 according to the Layer 2 session identifier of the service. In the session; CNG does not process the content of the Layer 2 session and directly transmits it.

The process of initiating a service call (reference 5) at the user terminal is the same as the prior art, but for resource reservation, the control process of the bearer control subsystem needs to be modified as follows:

When receiving the resource reservation request sent by the service server (No. 6), the bearer control subsystem checks the Layer 2 session identifier corresponding to the IP address of the user, and initiates a resource reservation for the Layer 2 session and the service session to the IP Edge. 7);

The IP Edge initiates a resource reservation request (label) to the AN according to the IP address and the layer 2 session identifier.

8) If the AN can directly manage the CNG, the AN also needs to initiate a resource reservation request for the Layer 2 session to the CNG, otherwise it is ignored, that is, if the AN cannot directly manage the CNG, then it is not necessary to initiate the CNG to the CNG. Resource reservation application for Layer 2 sessions;

After the resource reservation is completed by the AN (or CNG), the information is sent to the IP Edge. After the IP Edge successfully allocates the reserved resources for the Layer 2 session and the service session, the mapping between the Layer 2 session and the service session is established. ), and transfer the information to the business layer (reference 10).

At this point, the service can be allowed to continue (label 11).

As can be seen from the above description, as long as the user terminal has the capability of the Layer 2 session, the resource reservation and attribute update in the access network can be completed through the bearer control subsystem, thereby completing the mapping from the Layer 2 session to the service session, and thus, It solves the problem of user quality of service to IP edge devices. 10 is a flowchart of a method for controlling an access network session according to a sixth embodiment of the present invention. In this embodiment, the automatic configuration server allocates a corresponding layer 2 session identifier for a service subscribed or accessed by a user. . The specific implementation process is:

The user issues a request to the automatic configuration server (here, the registration process specifically refers to the process of establishing IP connectivity such as authentication and address assignment necessary for logging in to the network), and simultaneously registers the capability of the layer 2 session (reference 1). "Layer 2 session" means that a session indexed by one or more Layer 2 information during a session connection can be used, and the Layer 2 information identifying the Layer 2 session becomes a Layer 2 session identifier. In order to enable the Layer 2 information to identify the session, the embodiment of the present invention may use the original Layer 2 information, add new Layer 2 information on the basis of the original Layer 2 information, or replace the original Layer 2 information to identify the session. It includes attributes such as the service type of the session and the priority of the session, so that the AN can improve the control of the QoS as much as possible. Taking the AN of the Ethernet as an example, one or more VLAN id insertion frames may be added to the VLAN frame format of the original data packet to identify the session, and the P bit of the Vlan is used as the priority of the session. For business or session VLANs

Reference numeral 2, the ACS transmits user information to the service server. The user information includes a user's IP address, a logical link ID, and the like, but is not limited thereto. The ACS applies for a Layer 2 session identifier (reference 3) to the bearer control subsystem based on the user's service. If the ACS is able to assign a Layer 2 session ID, this step is omitted. The ACS allocates (or pushes) the Layer 2 session identifier corresponding to the service to the CNG (No. 4).

The Layer 2 session identifier may be pushed to the CNG when the registration response is sent, or directly sent to the CNG. After the CNG obtains the Layer 2 session identifier corresponding to the service and its corresponding policy (bandwidth, delay, gating, etc.), when the TE registers with the CNG and applies for an IP connection, the CNG is based on the type of service provided by the TE. The link between the link or the physical information and the policy of the Layer 2 session establishes a mapping of the Layer 2 session corresponding to the Layer 2 session identifier of the service. For example, when a TE uses the IP1 to provide services, the CNG simply follows the IP1. The IP data stream is mapped to the IP data stream of the Layer 2 session:), if a TE provides multiple services at the same time, the user gateway maps the service to the corresponding Layer 2 session according to the Layer 2 session identifier of the service, and the user gateway pairs The content of the layer session is not processed and directly transmitted.

Reference numeral 5, the ACS pushes the user information and the layer 2 session identifier to the bearer control subsystem. The bearer control subsystem finds the corresponding IP Edge and AN devices according to the user information, and sets the Layer 2 session and resource allocation (reference 6). After the user successfully registers with the ACS, the ACS notifies the bearer control subsystem. And the service server has been registered in the network, and the bearer control finds the corresponding IP Edge and AN device according to the user's IP address and logical link ID, and sets the Layer 2 session according to the Layer 2 session identifier and the default priority of the user. And resource allocation.

Reference numeral 7, the service end initiates a service call to the service server; the service server controls the application resource reservation (reference 8) to the bearer control subsystem.

Reference numeral 9, the bearer control subsystem checks a layer 2 session identifier corresponding to the user's IP, and initiates a resource reservation of the layer 2 session and the service session to the IP Edge; the IP Edge according to the IP address and the layer 2 session identifier to the AN Initiate a resource reservation request or attribute update (label 10). If the AN can directly manage the CNG, the AN also needs to initiate a resource reservation request for the Layer 2 session to the CNG, otherwise it is ignored.

After the resource reservation is completed, the IP Edge device allocates reserved resources for the Layer 2 session and the service session, and establishes a mapping from the Layer 2 session to the service session. The resource reservation is successful, allowing the service to continue (labels 12, 13).

According to the above control method, this embodiment can establish a logical end-to-end connection between the user and the IP Edge, and manage the resources and policies of the connection to control the QoS of the user in the access network and simplify the control mechanism. The purpose is to effectively solve the problem that the quality of service to the IP Edge cannot be controlled.

Referring to FIG. 11, FIG. 11 is a flowchart of a method for controlling an access network session according to a seventh embodiment of the present invention. In this embodiment, the service server allocates a corresponding layer 2 session identifier for the service subscribed or accessed by the user. The specific implementation process is: '

Reference numeral 1 , the user terminal registers with the service server, and negotiates and determines the layer 2 session capability. Since the user terminal CPE needs to traverse the user gateways CNG and AN, it is necessary to confirm whether the CNG and the AN can support the traversal of the Layer 2 session and the corresponding resource reservation processing. In the process of registering the CPE to the service server, a Layer 2 session is required. The negotiation of the capability determines that the CPE and the IP Edge have Layer 2 session capabilities (of course, the Layer 2 session capability of the IP Edge and the AN can be determined through static configuration, and the following negotiation process is ignored, and the user is directly notified of the specific secondary session capability). Specifically include:

The user terminal registration message carries the Layer 2 session capability supported by itself, for example, adding a VLAN as a session identifier, a specific layer number, and other related information; After the authenticated user passes, the service server notifies the user to adopt a specific Layer 2 session capability (for example, adding a VLAN as a Layer 2 session identifier) and its test session identification number according to the Layer 2 session capability of the IP Edge and the AN. (eg VLAN 100);

After determining that the user has selected the corresponding Layer 2 session capability, the service layer notifies the IP Edge to initiate a corresponding "Layer 2 test session". The IP Edge notifies the AN (and possibly CNG) to set the information of the Layer 2 test session. After successful IP Edge The Layer 2 test session sends a loopback, test packet (of course, it can also be initiated by the service layer). Once the CPE returns the "loopback" test packet, it responds to the service layer with a Layer 2 session between the IP Edge and the CPE. ability;

The business layer notifies the user that the registration is successful, after which the user can initiate a business call.

Reference numeral 2, when the user terminal initiates a service call; the service server and the user terminal negotiate the resources required for the session, and at the same time negotiate the layer 2 tongue mark and ensure that it is unique in the IP Edge and the AN (reference numeral 3), The Layer 2 session ID is used to implement the Layer 2 session ID. For example, no service has its own Layer 2 session space. You can also use the service session ID as a part of the Layer 2 session ID. You can directly use the service session ID as the Layer 2 session ID. The primary component is even indexed.

Reference numeral 4, the service layer initiates resource reservation of the layer 2 session while initiating the resource reservation of the service session by the bearer control layer. The service session identifier refers to a session that can be indexed by using information with three or more layers. The identifier is used as the service session identifier. The identifier is also used as the index of all the flow information and service shields of the session. The layer is unique.

Reference numeral 5, the bearer control subsystem sends an AN Layer 2 session negotiation and resource reservation to the IP edge device. Label 6, the IP Edge initiates the resource reservation of the Layer 2 session of the AN while the resources of the service session are allocated. (When the CNG of the user terminal is part of the AN, the AN also needs to initiate the CNG Layer 2 session resource reservation process).

After the AN resource is successfully reserved, the IP Edge establishes a mapping relationship between the Layer 2 session and the service session, and returns the resource reservation success to the bearer control.

Label 8, the bearer control feeds back the resource reservation success and the layer 2, service session information to the service layer, and the service layer notifies the user terminal of the success of the service connection and the layer 2 session information.

Label 9, the user exchanges service data on the Layer 2 session, the AN (CNG) controls the service flow according to the resources of the Layer 2 session, and the IP Edge implements data forwarding between the Layer 2 session and the service session.

This embodiment can be used by the user gateway or the home gateway (RG, Residential Gateway) to the user. The service interaction of the terminal is performed by a proxy (Proxy) or a relay (Relay), and the above process is performed instead of the user terminal. It can be seen that the embodiment of the present invention can establish a logical end-to-end connection between the user and the IP Edge, and manage the resources and policies of the connection to control the QoS of the user in the access network and simplify the control mechanism. Therefore, the problem that the quality of the user to the IP Edge cannot be controlled is effectively solved.

It can be seen from the above technical solution that the embodiment of the present invention identifies the service session by using the layer 2 information, and then dynamically negotiates the Layer 2 session between the user and the network affiliate subsystem NASS, and finally controls the resources of the service session through the Layer 2 session. The QoS control of the access network is managed by managing the resources allocated to the user by the logical connection of the Layer 2 session. At the same time, the QoS control of the access network is more perfected in the embodiment of the present invention. The reference of the Layer 2 session control identifies the session by using the Layer 2 information with the added new session attribute, and not only solves the service of the access network system. The problem of uncontrollable quality, and any emerging access technology effectively provides services for users to provide services.

The above is only a preferred embodiment of the present invention. For the method and system of the present invention, any access network (including but not limited to a metropolitan area network, Ethernet, ATM, etc.) can effectively improve the problem that the quality of service cannot be effectively controlled. It also provides a completely new solution for the last mile.

The present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. Any modifications and changes made by those skilled in the art without departing from the spirit and scope of the invention are included in the present invention. The scope of protection.

Claims

Rights request

A session control method for an access network, characterized in that it comprises the steps of:

Controlling resources of the service session according to the layer 2 session identifier.

2. The session control method of the access network according to claim 1, wherein the original layer 2 information is used, and new layer 2 information is added or the original layer 2 information is replaced by the original layer 2 information. Identify a Layer 2 session.

The method for controlling access to a network conference according to claim 1, wherein the Layer 2 information is used as an index to identify a service type of the session and/or a priority of the session.

The session control method of the access network according to claim 2, wherein the layer 2 information is: Layer 2 information including a virtual local area network or a medium access control.

The session control method of the access network according to claim 1, 3 or 4, wherein the network accessory subsystem NASS allocates a corresponding layer 2 session identifier for the service subscribed or accessed by the user.

The session control method of the access network according to claim 5, wherein the process of assigning a corresponding layer 2 session identifier to the service subscribed or accessed by the user is:

The user gateway registers the Layer 2 session capability with the NASS;

The NASS directly allocates the Layer 2 session identifier corresponding to the service according to the pre-planned information of the service that the user subscribes to or accesses; or applies to the bearer control subsystem RACS for the Layer 2 session identifier corresponding to the service, where the RACS dynamic is The service layer dynamically assigns a corresponding Layer 2 session identifier.

The NASS feeds the Layer 2 session identifier to the user gateway through the registration response or the RACS directly feeds back the Layer 2 session identifier to the user gateway.

The session control method of the access network according to claim 1, 3 or 4, wherein the automatic configuration server ACS allocates a corresponding layer 2 session identifier for the service subscribed or accessed by the user.

The session control method of the access network according to claim 7, wherein the process of assigning a corresponding layer 2 session identifier to the service subscribed or accessed by the user is:

The user gateway registers its own Layer 2 session capability with the ACS;

The ACS directly allocates a Layer 2 session identifier corresponding to the service according to the service level of the user and its corresponding planning identifier; or applies to the RACS for the Layer 2 session identifier corresponding to the service, where the RACS Dynamically assign a corresponding Layer 2 session identifier to the service;

The ACS feeds back the Layer 2 session identifier to the user gateway by using the registration response, or the RACS directly feeds back the Layer 2 session identifier to the user gateway.

The session control method of the access network according to claim 6 or 8, wherein the method further comprises:

The NASS or ACS pushes the user information and the layer 2 session identifier to the RACS;

The RACS user information finds a corresponding IP edge device and an access node device, and establishes a Layer 2 session and an attribute.

The session control method of the access network according to claim 9, wherein the process of controlling the service session resource according to the layer 2 session identifier is:

The service server requests a resource reservation from the RACS;

The RACS checks the Layer 2 session identifier corresponding to the user information, and initiates resource control of the Layer 2 session and the service session to the IP edge device;

The IP edge device initiates a resource reservation application to the access node device according to the user information and the layer 2 session identifier;

After the access network completes the resource reservation, the IP edge device allocates resources for the Layer 2 session and the service session, and establishes a mapping from the Layer 2 session to the service session.

The session control method of the access network according to claim 1, 3 or 4, wherein the service server allocates a corresponding layer 2 session identifier for the service subscribed or accessed by the user.

The access network session control method according to claim 11, wherein the process of assigning a corresponding layer 2 session identifier to a service subscribed or accessed by the user is:

The user terminal registers with the service server, and negotiates and determines the layer 2 session capability;

The user terminal initiates a service call to the service server;

The service server allocates required resources for the service and negotiates a layer 2 session identifier.

The access network session control method according to claim 12, wherein the specific process of the user terminal registering with the service server and negotiating and determining the layer 2 session capability is:

The request message registered by the user terminal carries the Layer 2 session capability supported by the user terminal;

After the service server authenticates the user, according to the Layer 2 session capability of the IP edge device and the access node device, the user terminal is notified in the message of the registration response to adopt a layer 2 session capability and its measurement. Trial session identification number;

After determining that the user terminal has selected the corresponding Layer 2 session capability, the service server notifies the IP edge device to initiate a corresponding Layer 2 test session;

After the IP edge device successfully informs the access node device to set the information of the Layer 2 test session, it sends a loopback test packet to the Layer 2 test session.

The user terminal is sent back to the service server to respond to the service server with the ability to have a Layer 2 session between the IP edge device and the user terminal.

The access network session control method according to claim 12, wherein the process of controlling resources of the service session according to the layer 2 session identifier is:

When the service server initiates a service session resource reservation to the RACS, the resource reservation of the Layer 2 session is initiated at the same time;

The RACS sends a Layer 2 session negotiation and resource reservation of the access node device to the IP edge device; the IP edge device allocates the resource of the service and initiates the resource reservation of the Layer 2 session of the access node device;

After the resource reservation of the access node device is successful, the IP edge device establishes a mapping relationship between the Layer 2 session and the service session, and returns the resource reservation success to the RACS.

The RACS feeds back the resource reservation success to the service server, and the server notifies the user terminal that the service connection succeeds and transmits the Layer 2 session information.

A session identifier allocation apparatus for an access network, comprising:

a registration request receiving unit, configured to receive a registration request of a user's Layer 2 session capability;

The session identification device of the access network according to claim 15, wherein the device further comprises:

The obtaining unit is configured to dynamically obtain a corresponding Layer 2 session identifier from the service to the bearer control subsystem for the service that is subscribed or accessed by the user.

17. The session identification device of the access network according to claim 15 or 16, wherein the device is integrated in a network accessory subsystem, an automatic configuration server or a service server.

18. A session control system for an access network, comprising:

And an allocation unit, configured to allocate a corresponding layer 2 session identifier to the service that is subscribed or accessed by the user, where the layer 2 session identifier is a layer 2 information that identifies the layer 2 session;

And a resource control unit, configured to control resources of the service session according to the layer 2 session identifier.

The session control system of the access network according to claim 18, wherein the system further comprises: a session establishing unit, configured to establish a layer 2 session and an attribute according to the received user information and the layer 2 session identifier.

The session control system of the access network according to claim 19, wherein the allocation unit comprises:

a registration request receiving sub-unit, configured to receive a registration request of a user's Layer 2 session capability; a static allocation sub-unit, configured to directly allocate the service for the service subscribed or accessed by the user through pre-planning information or service level and its corresponding planning identifier Corresponding Layer 2 session identifier;

The session identifier sending subunit is connected to the static allocation subunit, and is configured to send the layer 2 session identifier corresponding to the service.

The session control system of the access network according to claim 20, wherein the distribution unit further comprises:

The sub-unit is configured to dynamically obtain a corresponding Layer 2 session identifier from the service to the bearer control subsystem for the service that is subscribed or accessed by the user.

The session control system of the access network according to claim 21, wherein the resource control unit comprises:

a receiving subunit, configured to receive user information and a resource reservation request;

Checking the sending subunit, which is used to check the layer 2 session identifier corresponding to the user information, and initiates resource control of the layer 2 session and the service session to the IP edge device;

The resource control sub-unit is configured to control the layer 2 session and resource reservation according to the layer 2 session identifier and the attribute.

The session control system of the access network according to claim 22, wherein the system further comprises:

The mapping establishing unit is configured to allocate reserved resources for the Layer 2 session and the service session, and establish a mapping of the Layer 2 session to the service session.

The session control apparatus of the access network according to claim 23, wherein the allocation unit and the session establishment unit are respectively integrated in a network accessory subsystem and an automatic configuration server; and the control unit and the mapping establishment unit are integrated. In the bearer control subsystem.

The session control system of the access network according to claim 24, wherein the system further comprises at least one of the following:

The user terminal is coupled to the network accessory subsystem or the automatic configuration server; the user terminal includes: a service end and a user gateway; the user gateway is used to establish and maintain an IP connection connected to the access network; Ending the service and the IP connection provided by the user gateway to transmit the service data;

The transport layer device is coupled to the bearer control subsystem, and includes at least an access node device and an IP edge device; the access node device is configured to complete Layer 2 session resource reservation and attribute update; and the IP edge device is used by After the access node device completes the resource reservation, the mapping from the Layer 2 session to the service session is established.

The service server interacts with the user terminal, the automatic configuration server, and the bearer control subsystem, and is configured to receive user information transmitted by the automatic configuration server, and send a resource pre-request to the bearer control subsystem after receiving the call request from the user terminal. Stay for application.