WO2012083804A1

WO2012083804A1 - Method, system, and device for implementing qos in identifier network

Info

Publication number: WO2012083804A1
Application number: PCT/CN2011/083881
Authority: WO
Inventors: 何辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-12-21
Filing date: 2011-12-13
Publication date: 2012-06-28
Also published as: CN102546546A; CN102546546B

Abstract

The present invention relates to a method, system, and device for implementing quality of service (QoS) in an identifier network. The method comprises: an access gateway router (AGR) receiving a packet, on the basis of a piece of access identifier (AID) information of a source or of a destination within the packet, confirming the class of service of the QoS of the packet transmitting end or of the packet receiving end; on the basis of the class of service of the QoS, scheduling the packet received into a corresponding buffering queue of a scheduling priority; on the basis of the scheduling priority, the AGR scheduling and processing the packet in the corresponding buffering queue. The method and system of the present invention allow for the implementation of differentiated management of QoS in the identifier network.

Description

Method, system and device for implementing OoS in identification network

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and system for implementing QoS in an identification network.

Background technique

The IP address in the TCP/IP (Transmission Control Protocol/Internet Protocol) protocol widely used by the Internet has a dual function, and serves as the location of the network terminal's communication terminal host network interface in the network topology. The identity, which is also the identity of the transport layer host network interface. The TCP/IP protocol was not designed with host mobility in mind. However, as host mobility becomes more prevalent, the semantic overload defects of such IP addresses are becoming increasingly apparent. When the IP address of the host changes, not only the route changes, but also the identity of the communication terminal host changes. This will cause the routing load to become heavier and heavy, and the change of the host identity will also cause the application and connection to be interrupted.

The purpose of identification and location separation is to solve the problem of semantic overload and severe routing load of IP addresses, and to separate the dual functions of IP addresses to achieve dynamic redistribution of mobility, multiple townships, IP addresses, and mitigation of routes. Support for issues such as load and mutual visits between different network areas in the next generation Internet.

In the related art, the network router based implementation method is one of the solutions for identity identification and location separation. The latter scheme is simply referred to as the identification network, that is, the identity and location separation network. The basic idea of this scheme is: The network is divided into the access layer and the core layer. The mobile node in the network has two types of identification: User identity (Access Identifier, AID for short) and Routing-Location Identifier (RID). Configure a unique AID for each user in the network. The AID remains unchanged during the mobile process. In the data forwarding process, the AID can only be used at the access layer. The RID can only be used at the core layer. When applying layer communication, the AID is used to identify the peer.

As shown in Figure 1, the identification network mainly includes: a radio access network (RAN;), an access gateway router (Access Gateway Router, AGR for short), General Switch Router (GSR), Identifier Mapping Server (IDMS), and authentication center. The following are introduced separately:

AGR, responsible for providing access services for various mobile nodes (MNs), for access

The main function of the GSR is to select and forward data packets based on the routing location identifier RID in the data packet.

IDMS is mainly responsible for maintaining the mapping between user identity and location identity in the network, and providing query services to access gateway routers and other mapping servers.

Under the framework shown in Figure 1, the network can be divided into an access network and a backbone network. The access network is located at the edge of the backbone network and is responsible for access by all terminals. In the RAN part of the access network, all user terminals are addressed using the AID. The backbone network is responsible for routing of terminals accessed through different access networks. There is no overlap between the access network and the backbone network in the topology relationship. The application layer between the communication hosts uses the AID to identify the peer. The communication between the user terminals only needs to use the AID of the peer.

The access gateway router is located at the demarcation point between the backbone network and the access network, and interfaces with the access network and the backbone network to provide access services for the terminal, maintain user connections, and forward user data. All communication of the user terminal is forwarded and managed by the access gateway router of the access network.

In the network, because the service agreement signed by the user and the operator is different, the operator is required to provide policy support to provide differentiated service quality for the user.

Quality of Service (QoS) is an important issue that operators need to address when they operate their networks. Providing different levels of service quality for different users, achieving differentiated services, and refining operations are important means to improve operators' operational capabilities.

How to realize differentiated management of service quality in the identification network is a problem to be solved. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for implementing QoS in an identification network to implement differentiated management of service quality in an identification network.

In order to solve the above technical problem, the present invention provides a method for realizing quality of service in an identification network. Method, the method includes:

The AGR receives the packet, and determines the QoS level of the packet sending end or the packet receiving end according to the identity identifier (AID) of the source end or the destination end in the packet;

And receiving, according to the QoS level, the received message into a buffer queue corresponding to the scheduling priority; and

The AGR processes the packet in the corresponding buffer queue according to the scheduling priority.

The above method can also have the following characteristics:

The higher the QoS class of the packet, the higher the scheduling priority and the smaller the packet processing delay.

The above method can also have the following characteristics:

The method further includes: when the AGR requests the authentication center to authenticate the MN, acquiring the QoS level of the MN, and buffering the correspondence between the AID of the MN and the QoS level;

The step of determining, by the AGR, the QoS service level of the packet sending end or the packet receiving end according to the AID of the source end or the destination end in the message includes: determining, by the AGR, the corresponding relationship of the AID query cache of the source end or the destination end QoS level.

The above method can also have the following characteristics:

The method further includes: a mapping relationship between the AID of the AGR cache MN and a route identifier (RID); the step of the AGR scheduling the packet in the corresponding buffer queue according to the scheduling priority, the step of: the AGR according to the The mapping relationship processes and forwards the packets in the currently scheduled buffer queue.

The above method can also have the following characteristics:

It also includes: The AGR performs aging management on the mapping relationship between the AID and the RID according to the QoS level of the MN. The higher the QoS level, the longer the aging time, the lower the QoS level, and the shorter the aging time.

The foregoing method may also have the following features: The AGR performs the aging management of the mapping relationship between the AID and the RID according to the QoS level of the MN, including:

The AGR determines the aging time only according to the QoS class; or

The AGR determines the aging time according to the QoS level and the MN login frequency or online time. The above method can also have the following characteristics:

The method further includes: setting an aging time of the buffer queues of the scheduling priorities according to the QoS level of the MN, and discarding the buffered packets in the buffer queue when the aging time of the buffer queues arrives.

The invention also provides a system for implementing the quality of service in the identification network, the system comprising an AGR of the identification network, the AGR comprising a message receiving module, a scheduling priority determining module, a message buffering module and a message processing module, wherein:

The message receiving module is configured to receive a message;

The scheduling priority determining module is configured to: determine a QoS level of the packet sending end or the packet receiving end according to the AID of the source end or the destination end in the received packet; and put the received packet into corresponding according to the QoS level Scheduling priority buffer queues;

The packet buffering module includes a plurality of buffer queues having different scheduling priorities, and configured to buffer packets of a QoS level corresponding to the scheduling priority;

The packet processing module is configured to process the packet in the buffer queue corresponding to the scheduling priority according to the scheduling priority.

The above system can also have the following characteristics:

It also includes: a certificate authority, which is set to: when the AGR requests authentication, returns the QoS level of the MN to be authenticated;

The AGR further includes an authentication module and a cache module, where the authentication module is configured to: request, by the authentication center, the mobile node (MN) to authenticate, and obtain the QoS level of the MN; the cache module is configured to: cache the Corresponding relationship between the MN's AID and the QoS level; the scheduling priority determining module is configured to determine the QoS level according to the correspondence between the source or destination AID query cache.

The above system can also have the following characteristics:

The cache module is further configured to cache a mapping relationship between the AID of the MN and the route identifier (RID), where the packet processing module is configured to report the current scheduled buffer queue according to the mapping relationship. The text is processed and forwarded.

The above system can also have the following characteristics:

The AGR further includes: a cache management module, configured to: aging the mapping between the AID and the RID according to the QoS level of the MN, the higher the QoS level, the longer the aging time, the lower the QoS level, and the shorter the aging time.

The above system can also have the following characteristics:

The cache management module is configured to: determine the aging time only according to the QoS level; or determine the aging time according to the QoS level and the MN login frequency or online time.

The above system can also have the following characteristics:

The AGR further includes: a cache management module, configured to: set an aging time of a buffer queue of each scheduling priority according to a QoS level of the MN, and discard the buffer queue when the aging time of the buffer queue arrives Medium buffered message.

The present invention also provides an AGR, which includes a message receiving module, a scheduling priority determining module, a message buffering module, and a message processing module, where:

The message receiving module is configured to receive a message;

The above AGR can also have the following characteristics:

The authentication module is further configured to: request the authentication center to authenticate the mobile node (MN), and obtain the QoS level of the MN; the cache module The method is configured to: cache a correspondence between an AID of the MN and a QoS level; and the scheduling priority determining module is configured to determine a QoS level according to a correspondence between the source or destination AID query cache.

The above AGR can also have the following characteristics:

The cache module is further configured to cache a mapping relationship between the AID of the MN and the route identifier (RID), where the packet processing module is configured to process and forward the packet in the currently scheduled buffer queue according to the mapping relationship. .

The above AGR can also have the following characteristics:

The method further includes: a cache management module, configured to: aging the mapping between the AID and the RID according to the QoS level of the MN, the higher the QoS level, the longer the aging time, the lower the QoS level, and the shorter the aging time.

The above AGR can also have the following characteristics:

The method further includes: a cache management module, configured to: set an aging time of a buffer queue of each scheduling priority according to a QoS level of the MN, and when the aging time of the buffer queue arrives, discard the buffer queue Rushing message.

In the above solution, the AGR performs differentiated scheduling processing on the received packets according to the quality of service level of the source or destination, and implements differentiated management of service quality. BRIEF abstract

1 is a schematic diagram of a network topology of a network-based identity and location separation architecture of the related art;

2 is a schematic diagram of a method for implementing quality of service in an identification network according to an embodiment of the present invention;

3 is a schematic diagram of a processing procedure when a MN initiates a service flow according to an embodiment of the present invention;

4 is a schematic diagram of a strict priority scheduling manner according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a module of a system for implementing quality of service in an identification network according to an embodiment of the present invention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

As shown in FIG. 2, the method for implementing the service quality in the identifier network in the embodiment of the present invention includes: Step 201: AGR receives a packet, and determines a packet sending according to an identity identifier (AID) of the source end or the destination end in the packet. The QoS level of the end or packet receiving end;

The authentication center sets the user's identity information (AID) while setting the user's

a QoS level, the AGR, when requesting the authentication center to authenticate the MN, acquiring the QoS level of the MN, and buffering the correspondence between the AID and the QoS level of the MN, where the AGR is based on the AID of the source or destination The correspondence of the query cache determines the QoS level.

Step 202: Put the received packet into a buffer queue corresponding to the scheduling priority according to the QoS class.

Step 203: The AGR processes, according to the scheduling priority, a packet in a corresponding buffer queue.

When forwarding a packet, the packet is placed in a buffer of different priorities according to the QoS class in the mapping table, and the user is subjected to a differentiated and refined service. The higher the QoS level of the packet, the higher the priority of the corresponding scheduling, and the smaller the packet processing delay.

The AGR caches the mapping between the AID of the MN and the route identifier (RID), and processes and forwards the packets in the currently scheduled buffer queue according to the mapping relationship.

The AGR performs aging management on the mapping relationship according to the QoS level of the MN. The higher the QoS level, the longer the aging time, the lower the QoS level, and the shorter the aging time.

In the network, there are a large number of users, and most of the low-priority or ordinary users do not use the network for a long time. In the embodiment of the present invention, a mapping method based on the user QoS level is used to manage the AID-RID managed by the AGR. .

Aging the AID-RID mapping entry policy on the AGR device based on the user's QoS class: 1. Determine the aging time based only on the QoS class

On the AGR device, the AID-RID mapping table is managed according to the user level, and is divided into four groups: high, medium, normal, and low. The aging time is set for each group. The relationship between the aging time is 〉〉〉

2. According to the QoS class, combined with the login frequency or the online time to determine the aging time, the AID-RID mapping table is managed on the AGR device according to the user level, and is divided into four groups: high, medium, normal and low. Aging time, the relationship between the basic aging time is o _high > o _medium > o _normal > o _low

The aging time of each newly generated mapping table entry in the AGR group takes its own basic value. According to the frequency of the user login or the length of the online time, each group also sets the step aging time Δ, and the step size is aging. The magnitude relationship of time is Λτ _Μ≠ > AT _MEDLUM > AT _NORMAL > AT _1OW .

Regardless of whether the login frequency or the online time is the standard, the base value of the frequency or time is set to 0 on the AGR. Assuming that the registration frequency is used as the standard, the aging time of each mapping table entry is t = a + (frequency! ) * Δτ.

For a long time, the mapping table entry that is not used for login and has a lower QoS level of the user is aged, and the cache capacity of the AGR is effectively utilized;

At the same time, you can choose to set the aging time of its mapping table entries for some high-priority users to never age, to avoid the impact of entries in the case of a large number of attacks;

When the aging time expires, the mapping entry is deleted from the AGR. When the user logs in again, when the AID-RID mapping entry cannot be obtained, it is obtained again from the mapping server.

Aging queues on AGR devices based on the user's QoS class:

The aging time of each priority buffer queue is set based on the QoS level. The aging time is set to the same as the aging time. The aging time is discarded until the packet buffered in the buffer queue of the corresponding priority is discarded to avoid low-priority packet bursts. Congestion caused by high-priority packets.

The packets in the high queue must be guaranteed to be fast forwarded, so the aging time is ∞. You can set the aging time for the medium, normal, and low queues. The aging time is based on t _med > t , > t _lnw The process of the MN initiating the service flow in the embodiment of the present invention is described with reference to FIG. 3:

First, the AGR has obtained the mapping entry of the AID-RID from the IDMS mapping server. When the MN initiates the service flow, the processing procedure is as follows:

(301) MN triggers a service flow;

(302) AGR authenticates the request to the certification center;

(303) The authentication center passes the authentication and sends back the QoS level of the user;

(304) AGR saves the correspondence between QoS class and AID;

( 305 ) The AGR obtains and caches the mapping relationship between the AID and the RID, and manages the mapping relationship between the AID and the RID according to the QoS level, including calculating the aging time of the updated mapping entry, and aging the mapping entry according to the aging time;

The method for obtaining the mapping relationship between the AID and the RID by the AGR is the same as the prior art, and details are not described herein again.

(306) The service flow is put into a corresponding group of the device, such as high, medium, normal, or low, according to the user QoS level, and the management scheduling is performed.

The AGR receives the service flow information, determines the corresponding QoS class, and puts it into the buffer queue of the device and its corresponding priority according to the priority group to which it belongs, and schedules the buffer queue according to the priority of the buffer queue. Process the message. The higher the priority, the earlier the packet is processed, reducing the delay of high-priority packets.

On the AGR device, in order to ensure that the packets of the high-priority packets are preferentially served, the strict priority scheduling mode is adopted. The packets in the buffer queue with the higher priority are scheduled to be processed (such as encapsulation and forwarding). Messages, etc.).

To implement the above method, the embodiment of the present invention further provides a system for implementing quality of service in an identification network. As shown in FIG. 5, the system includes an access gateway router (AGR), and the AGR includes: a message receiving module, and a setting To receive a message;

a scheduling priority determining module, configured to determine a quality of service (QoS) level of the message sending end or the message receiving end according to the identity identifier (AID) of the source end or the destination end in the received message; and receive according to the QoS class The message is placed in a buffer queue corresponding to the scheduling priority;

a packet buffering module, including multiple buffering queues, configured to buffer packets corresponding to QoS levels; The packet processing module is configured to process the packet in the corresponding buffer queue according to the scheduling priority scheduling.

The higher the QoS class of the packet, the higher the scheduling priority and the smaller the packet processing delay. The system also includes a certificate authority, configured to return the QoS level of the MN to be authenticated when the AGR requests authentication;

The AGR further includes an authentication module and a cache module, where the authentication module is configured to request the authentication center to authenticate the mobile node (MN), and obtain the QoS level of the MN, where the cache module is configured to cache the Corresponding relationship between the MN's AID and the QoS level; the scheduling priority determining module determines the QoS level according to the correspondence between the source or destination AID query cache.

The cache module is further configured to cache a mapping relationship between the AID of the MN and the route identifier (RID), and the packet processing module processes and forwards the packet in the currently scheduled buffer queue according to the mapping relationship.

The AGR further includes a cache management module, configured to perform aging management on the corresponding mapping relationship according to the QoS level of the MN. The higher the QoS level, the longer the aging time, the lower the QoS level, and the shorter the aging time.

The AGR sets the step aging time according to the MN login frequency or the online time. The higher the login frequency or the longer the online time, the longer the aging time.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware to be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the invention. It should be understood by those skilled in the art that modifications or equivalents may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention. It is intended to be included within the scope of the appended claims.

Industrial applicability

In the embodiment of the present invention, the AGR performs differentiated scheduling processing on the received packet according to the quality of service level of the source end or the destination end, and implements differentiated management of the service quality.

Claims

Claim

A method for implementing quality of service in an identification network, comprising:

The access gateway router (AGR) receives the packet, and determines a quality of service (QoS) level of the packet sending end or the packet receiving end according to the identity identifier (AID) of the source end or the destination end in the packet; The received message is placed in a buffer queue corresponding to the scheduling priority;

2. The method according to claim 1, wherein the higher the QoS level of the packet, the higher the scheduling priority, and the smaller the packet processing delay.

3. The method according to claim 1, further comprising: when the AGR requests the authentication center to authenticate the mobile node (MN), acquiring the QoS level of the MN, and buffering the AID and the QoS level of the MN. Correspondence relationship;

4. The method of claim 1, further comprising: mapping the AID of the AGR cache MN to a route identifier (RID);

And the step of processing, by the AGR, the packet in the buffer queue corresponding to the scheduling priority according to the scheduling priority, the AGR processing and forwarding the packet in the currently scheduled buffer queue according to the mapping relationship.

The method of claim 1, further comprising: aging the mapping between the AID and the RID according to the QoS level of the MN, the higher the QoS level, the longer the aging time, the lower the QoS level, and the aging The shorter the time.

6. The method of claim 5, wherein

The AGR performs aging management on the mapping relationship between the AID and the RID according to the QoS class of the MN. The steps include:

The AGR determines the aging time only according to the QoS class; or

The AGR determines the aging time according to the QoS level and the MN login frequency or online time.

7. The method of claim 1 further comprising:

The aging time of the buffer queues of the scheduling priorities is set according to the QoS level of the MN. When the aging time of the buffer queues arrives, the buffered packets in the buffer queue are discarded.

A system for implementing quality of service in an identification network, the system comprising an access gateway router (AGR) of an identification network, the AGR comprising a message receiving module, a scheduling priority determining module, a message buffering module and a message processing Module, where:

The message receiving module is configured to receive a message;

The scheduling priority determining module is configured to: determine a quality of service (QoS) level of the packet sending end or the packet receiving end according to the identity identifier (AID) of the source end or the destination end in the received packet; and according to the QoS level The received message is placed in a buffer queue corresponding to the scheduling priority;

9. The system according to claim 8, wherein the higher the QoS level of the message, the higher the scheduling priority, and the smaller the packet processing delay.

10. The system of claim 8, further comprising an authentication center configured to: return a QoS level of the MN to be authenticated when the AGR requests authentication;

The AGR further includes an authentication module and a cache module, where the authentication module is configured to: request, by the authentication center, the mobile node (MN) to authenticate, and obtain the QoS level of the MN; the cache module is configured to: cache the Corresponding relationship between the AID of the MN and the QoS level; the scheduling priority determining module is configured to determine according to the correspondence between the AID query cache of the source or destination end QoS level.

The system of claim 8, wherein: the cache module is further configured to cache a mapping relationship between an AID of the MN and a route identifier (RID), where the packet processing module is configured to view the current relationship according to the mapping relationship. The packets in the scheduled buffer queue are processed and forwarded.

The system of claim 8, wherein: the AGR further includes a cache management module, configured to: perform aging management on the mapping relationship between the AID and the RID according to the QoS level of the MN, and the higher the QoS level, the more the aging time is. Long, the lower the QoS level, the shorter the aging time.

The system of claim 12, wherein the cache management module is configured to: determine the aging time only according to the QoS level; or determine the aging time according to the QoS level and the MN login frequency or online time.

The system of claim 8, wherein: the AGR further includes a cache management module, configured to: set an aging time of a buffer queue of each scheduling priority according to a QoS level of the MN, where the buffer queue is When the aging time arrives, the buffered packets in the buffer queue are discarded.

An access gateway router (AGR), the AGR includes a message receiving module, a scheduling priority determining module, a message buffering module, and a packet processing module, where:

The message receiving module is configured to receive a message;

The AGR of claim 15, wherein the higher the QoS level of the packet, the higher the priority of the scheduling, and the smaller the packet processing delay.

17. The AGR of claim 15, further comprising an authentication module and a cache module, The authentication module is configured to: request the authentication center to authenticate the mobile node (MN), and obtain the QoS level of the MN; the cache module is configured to: cache the correspondence between the AID and the QoS level of the MN; The priority determining module is configured to determine a QoS level according to the correspondence between the source or destination AID query cache.

The AGR of claim 15, wherein: the cache module is further configured to cache a mapping relationship between an AID of the MN and a route identifier (RID), where the packet processing module is configured to view the current relationship according to the mapping relationship. The packets in the scheduled buffer queue are processed and forwarded.

The AGR of claim 15, further comprising: a cache management module, configured to: aging the mapping between the AID and the RID according to the QoS level of the MN, the higher the QoS level, the longer the aging time, the QoS The lower the level, the shorter the aging time.

The AGR of claim 19, wherein the cache management module is configured to: determine the aging time only according to the QoS level; or determine the aging time according to the QoS level and the MN login frequency or the online time.

The AGR of claim 15, further comprising: a cache management module, configured to: set an aging time of a buffer queue of each scheduling priority according to a QoS level of the MN, where an aging time of the buffer queue arrives When the buffered message in the buffer queue is discarded.