CN1996991B - Configuration method of the service flow strategy in WiMAX network - Google Patents

Abstract

The invention discloses a configuration method of a service flow strategy in a WiMAX network. More than one network node in the WiMAX network is connected step by step. The method includes: setting a flow identification field in the policy decision message in advance. The identifier is recorded in the flow identifier field, and then the policy decision message is sent to the lower-level node to trigger the lower-level node to execute service flow policy configuration. The method of the present invention records the flow identifier of at least one service flow to be configured by setting the flow identifier field in the policy decision message, so that the network node can clearly know the service flow for QoS parameter configuration, thereby correctly completing the corresponding operation, Make the corresponding service flow obtain the required resources.

Description

Configuration method of service flow policy in WiMAX network

technical field

The invention relates to WiMAX network technology, in particular to a method for configuring a service flow policy in a WiMAX network. the

Background technique

Worldwide Interoperability for Microwave Access (WiMax, Worldwide Interoperability for Microwave Access) technology is a broadband wireless access standard, which is based on the 802.16 protocol and can provide high-speed Internet-oriented connections. Different from the 3G network, the WiMax network fully adopts the IP packet switching technology, and does not have to provide voice-oriented circuit switching. Based on the above characteristics, VoIP must be adopted for voice communication on WiMax network. the

Since the WiMax system can carry multiple services, such as voice, video, HTTP, and Email, and each service has different requirements on the quality of service (QoS), the WiMAX network uses different service flows for the same mobile terminal (MS /MSS) provide different service data. The service flow is divided according to group information, such as source address, destination address, port number and protocol number, etc., and a QoS parameter is specified for each service flow, so as to provide corresponding service quality for different services. The system also sets a Service Flow Identification (SFID, Service Flow Identification) for each service flow, which is used to indicate the service flow and the corresponding QoS parameters. the

In practical applications, the following operations can be performed on the service flow: 1) Create. For example, when there is a new application requirement, the system can create a new service flow. 2) Approval (Admit). For example, the system determines whether it can meet the QoS parameter requirements of a certain service flow according to the actual resource usage. 3) Activation refers to the process of putting a service flow into use after it is approved. 4) Modify (Modify), this operation can be performed when the QoS parameters of a certain service flow cannot meet the current application requirements, so as to modify and adjust the QoS parameters. 5) Delete (Delete). When an application ends, the service flow supporting the application needs to be deleted. the

In the WiMAX system, the network nodes that provide service flow for users mainly include: Service Flow Management Module (SFM, Service Flow Management), Service Flow Authorization Module (SFA, ServiceFlow Authorization) and Policy Function Module (PF, Police Function). the

Wherein, the SFM is set on the side of the base station, and can perform related service flow operations according to local wireless resource conditions. SFA includes Serving SFA (Serving SFA) and Anchor SFA (AnchorSFA). This module can perform approval operations on service flows according to local policies. PF is located in the Connectivity Service Network (CSN) and is used to store user information and provide QoS policies for service flows. the

Figure 1 shows the process of configuring a service flow policy in the prior art. The configuration operation refers to creating, modifying or deleting, etc., and specifically includes the following steps:

Step 101, after the SFM is triggered, it sends a policy decision request (PD-Request) message to the serving SFA. the

In this step, the reasons for triggering the SFM can be various, such as a request from the MSS, or the SFM receives a Dynamic Service Flow Modification (Dynamic Service Flow Modification) instruction, etc., which will not be described here. the

Steps 102-103: After receiving the PD-Request message, the serving SFA is triggered to initiate a PD-Request to the anchor point SFA, and then the anchor point SFA sends the PD-Request to the network service provider (NSP, Network Service Provider) to which the MSS belongs. Service Provider) PF. the

Step 104: After receiving the PD-Request, the PF sets the service policy of the service flow, and sends a response to the anchor point SFA through a policy decision response (PD-Response) message. the

Steps 105-106: After receiving the PD-Response message, the anchor SFA is triggered to send a PD-Response to the serving SFA, and then the serving SFA sends the PD-Response to the SFM. the

The Policy Decision Request (PD-Request) and Policy Decision Response (PD-Response) sent in the above process are respectively used to request and respond to the policy setting of the service flow, so they are collectively referred to as Policy Decision (PD, Policy Decision) messages. Both messages are set with a Decision Action field, which is used to notify the operation type of the service flow configuration between network nodes. the

Since service flow policy configuration is performed for each specific service flow, a series of network nodes in the WiMAX network, such as serving SFA, anchor point SFA, PF, etc., can only be executed after knowing which service flow needs to be configured. Therefore, the above-mentioned policy decision process cannot be realized actually, because the existing policy decision message does not carry the indication information of the service flow to be configured. the

Contents of the invention

In view of this, the main purpose of the present invention is to provide a service flow policy configuration method in a WiMAX network, so that network nodes can correctly configure the corresponding service flow policy. the

In order to achieve the above object, the technical solution of the present invention is specifically realized in the following way:

A method for configuring a service flow strategy in a WiMAX network, wherein more than one network node in the WiMAX network is connected step by step, the method includes: setting a flow identification field in a policy decision message in advance;

After the service flow management module in the WiMAX network is triggered, it judges the operation type of the service flow configuration, if it is a creation operation, the service flow identification field in the policy decision request is set to empty, and the policy decision request is sent ; If it is a modification or deletion operation, record the service flow identifier to be modified or deleted in the service flow identifier field of the policy decision request;

After the serving SFA in the WiMAX network receives the policy decision request from the service flow management module, it maps the service flow identifier in the policy decision request to a flow identifier according to the preset correspondence, and records the flow identifier in its own Issued in the generated policy decision request;

After the anchor point SFA in the WiMAX network is triggered, set its own corresponding field according to the strategy decision request of the service SFA, and generate a strategy decision request and send it to the strategy function module in the WiMAX network;

After the policy function module in the WiMAX network is triggered by the policy decision request, it judges the operation type of the service flow configuration, if it is a creation operation, it generates a corresponding flow identifier for the service flow to be created, and records it in the policy decision response. If it is a modification or deletion operation, record the flow identification of the service flow to be modified or deleted in the flow identification field of the policy decision response;

The anchor point SFA sets its own corresponding field according to the policy decision response of the policy function module, and generates a policy decision response and sends it to the service SFA;

After the service SFA receives the policy decision response of the anchor point SFA, it judges the operation type of the service flow configuration, if it is a creation operation, it generates a service flow identifier for the flow identifier in the policy decision response, and sets the service flow identifier The record is sent in the policy decision response generated by itself; if it is a modification or deletion operation, the flow identifier is mapped to the service flow identifier according to the preset corresponding relationship, and then the service flow identifier is sent to the The service flow management module. the

The method for setting the corresponding relationship in advance is: the service SFA sets the service flow identifier and the flow identifier to be the same; or the service SFA adds its own identifier to the service flow identifier to generate a corresponding flow identifier. the

It can be seen from the above technical solution that the configuration method of the service flow policy in the WiMAX network of the present invention records the flow identification of at least one service flow to be configured by setting the flow identification field in the policy decision message, so that the network node can clearly know Perform QoS parameter configuration service flow, so as to correctly complete the corresponding operation, so that the corresponding service flow can obtain the required resources. the

Description of drawings

Fig. 1 is the specific process of configuring the service flow policy in the prior art;

Fig. 2 is the process of configuring the service flow policy in the present invention. the

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. the

The present invention sets a flow identifier field in the existing PD message to record the flow identifier of the service flow to be configured. When any node in the WiMAX network is triggered to perform service flow configuration, the node will record the flow identifier of the service flow to be configured in the flow identifier field, and then send the PD message to the lower-level node, triggering the lower-level node to execute Policy configuration corresponding to the service flow. the

Based on the above settings, the process of configuring the service flow policy in the present invention is shown in Figure 2, specifically including the following steps:

Step 201, after the SFM is triggered, record the service flow identifier to be configured in the service flow identifier field, and then send the PD-Request message carrying the service flow identifier field to the serving SFA. the

In this step, the SFM will judge the operation type of the service flow configuration after being triggered, if it is a creation operation, set the service flow identification field in the PD-Request to empty, and send the PD-Request; if it is a modification or delete operation, record the service flow identifier to be modified or deleted in the service flow identifier field of the PD-Request and send it. the

The conditions that trigger the SFM to execute the policy decision process are: MS sends a dynamic service flow request, or needs for resource optimization. the

Step 202: After receiving the PD-Request message, the serving SFA is triggered to initiate a PD-Request to the anchor SFA, and then the anchor SFA sends the PD-Request to the PF. the

In this step, after the serving SFA receives the PD-Request of the SFM, it maps the service flow identifier (SFID) in the PD-Request to a flow identifier (Flow ID) according to the preset corresponding relationship, and then records the flow identifier Issued in the PD-Request generated by itself. the

For the creation operation, since the service flow identifier field of the SFM is empty, the flow identifier field in the PD-Request sent by the service SFA is also empty. the

After the anchor SFA is triggered, it sets its own corresponding fields according to the PD-Request of the service SFA, and generates a PD-Request to send to the PF. At this time, relative to the PD-Request, the service SFA is the upper-level node of the anchor SFA, and the PF is the lower-level node of the anchor SFA. the

Step 203: After receiving the PD-Request message, the PF sets the business policy of the service flow indicated by the Flow ID, and replies to the anchor point SFA through a PD-Response message. the

For the PF, after being triggered by the PD-Request message, it will judge the operation type of the service flow configuration. If it is a creation operation, generate a corresponding flow identifier for the service flow to be created, and record it in the flow identifier field; if it is a modification or deletion operation, record the flow identifier of the service flow to be modified or deleted in PD-Response Emitted in the stream ID field of the . the

Step 204: After receiving the PD-Response message, the anchor SFA sends it to the serving SFA, and then the serving SFA sends the message to the SFM, and the policy decision process ends. the

In this step, the anchor point SFA will set its own corresponding fields according to the PD-Response of the PF, and generate a PD-Response to send to the serving SFA. For PD-Response, PF is the upper-level node of the anchor point SFA, and the serving SFA is the lower-level node of the anchor point SFA. the

In addition, after receiving the PD-Response of the anchor point SFA, the serving SFA will judge the operation type of the service flow configuration, if it is a creation operation, generate a service flow identifier for the flow identifier in the PD-Response, and set the service flow The identification record is sent in the PD-Response generated by itself; if it is a modification or deletion operation, the flow identification is mapped to the service flow identification according to the preset corresponding relationship, and then the service flow identification is sent through the PD-Response generated by itself . the

A specific example of the preset corresponding relationship is: the service SFA sets the service flow identifier and the flow identifier to be the same; or the service SFA adds its own identifier to the service flow identifier to generate a corresponding flow identifier. In practical applications, it can be set arbitrarily as required, as long as the mapping relationship between the service flow identifier and the flow identifier can be maintained. the

So far, all network nodes on the WiMAX network can save the service policy of the service flow according to the flow identifier. Furthermore, the SFM can set multiple service flow identifiers to be configured in the service flow identifier field, so as to set service policies for multiple service flows at the same time, thereby saving signaling procedures and improving network utilization. the

In addition, because the WiMAX network successfully configures the required service flow policy, the implementation of the subsequent resource reservation (RR) process can also be well guaranteed, and will not be repeated here. the

It can be seen from the foregoing embodiments that the method for configuring a service flow policy in a WiMAX network of the present invention records the flow identifier of at least one service flow to be configured by setting the flow identifier field in the policy decision message, so that the network node can clearly Know the service flow for which QoS parameter configuration is performed, so as to correctly complete the corresponding operation, so that the corresponding service flow can obtain the required resources. the

Claims (2)

1. the collocation method of service flow strategy in the WiMAX network, one in the said WiMAX network connects with upper network node step by step, it is characterized in that this method comprises: the traffic identifier field is set in tactful decision message in advance;

After management service flow module in the said WiMAX network is triggered, judge the action type of said service flow configuration, if creation operation then the service flow identification field in the strategy decision request be set to sky, and send said strategy decision request; If revise or deletion action, will wait that then the service flow identification record of revising or deleting sends in strategy decision requested service traffic identifier field;

After services stream authorization module SFA in the said WiMAX network receives the strategy decision request of management service flow module; According to the corresponding relation that sets in advance should strategy service flow sign in the decision request be mapped as traffic identifier, and said traffic identifier be recorded in the strategy decision request that self generates send;

After anchor point SFA in the said WiMAX network is triggered, determine request that the respective field of self is set, and generation strategy decision request send to the policing feature module in the said WiMAX network according to the strategy of serving SFA;

After policing feature module in the said WiMAX network is determined request trigger by strategy; Judge the action type of said service flow configuration; Generate corresponding traffic identifier if creation operation then is a service flow to be created, and be recorded in the traffic identifier field of strategy decision response and send; If revise or deletion action, the traffic identifier that then will wait to revise or delete service flow is recorded in the traffic identifier field of strategy decision response and sends;

Said anchor point SFA responds the respective field that self is set based on the strategy decision of policing feature module, and generation strategy decision response sends to service SFA;

After said service SFA receives the strategy decision response of anchor point SFA; Judge the action type of said service flow configuration; If creation operation is then for the traffic identifier in this strategy decision response generates the service flow sign, and this service flow identification record is sent in the strategy decision response that self generates; If revise or deletion action, then traffic identifier is mapped as the service flow sign based on the corresponding relation that is provided with in advance, more said service flow sign is issued to said management service flow module through the strategy decision response that self generates.

2. based on the described method of claim 1, it is characterized in that the said method that corresponding relation is set in advance is: service SFA service flow sign is set to identical with traffic identifier; Or service SFA adds the traffic identifier that self identification generates correspondence on the service flow sign.

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