WO2007107080A1

WO2007107080A1 - A method, system and device for releasing resource in the worldwide interoperability for microwave access network

Info

Publication number: WO2007107080A1
Application number: PCT/CN2007/000729
Authority: WO
Inventors: Ming Zhou; Hongcheng Zhuang; Ke Zeng; Jietao Zhang; Zheshui Xiao; Hanmei Du
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-03-17
Filing date: 2007-03-07
Publication date: 2007-09-27
Also published as: CN101039515A; CN100536601C

Abstract

The invention is applied to the wireless communication technique. A method, system and device for releasing resource in the worldwide interoperability for microwave access network enables the anchor authenticator releasing the related resource in time when a mobile station leaves the network. The anchor PC/LR manages the mobile stations and if it finds a mobile station leaves the network, it informs the anchor authenticator a message carrying one or more identifiers of the mobile station which leaves the network, and the anchor authenticator deletes the safe information of the corresponding mobile station according to the identifiers. The invention can release system resource in time and increase the utilizing efficiency of the system resource by deleting the safe information. When the anchor PC/LR informs the anchor authenticator that the mobile station leaves the network, the anchor PC/LR can use either a new added message or an existing message that is expanded.

Description

Method, system and device for releasing resources in a microwave access global interworking network The application claims to be submitted to the Chinese Patent Office on March 17, 2006, the application number is 200610067557.2, and the invention name is "the microwave access global interoperability network." The method and its system, the priority of the Chinese patent application, the entire contents of which is incorporated herein by reference.

Technical equipment

The present invention relates to wireless communication technologies, and in particular, to a global interoperability technology for microwave access, and in particular, to a method, system and device for releasing resources in a global interworking network for microwave access.

Background technique

With the development of communication technology and the growth of user demand, data services have developed rapidly. The rapid growth of data traffic has led to an increasing demand for communication bandwidth. Broadband access is showing a huge market to the industry. In order to break through the bandwidth bottleneck of the access network, various broadband access technologies have been introduced.

Compared with the wired access method, Broadband Wireless Access (BWA,) technology with wireless access has obvious advantages such as flexibility, convenience, mobility, and low investment. The Third Generation (3G,,), Wireless Local Area Network (WLAN) and broadband wireless metropolitan area network

The BWA technology represented by the Wireless Metropolitan Area Network (WMAN) has developed rapidly in recent years.

Worldwide Interoperability for Microwave Access (WIMAX) is a kind of wireless metropolitan area network technology. As a research hotspot in the field of broadband WMAN, it has attracted the attention of major manufacturers and research institutions. "WiMAX is a well-known name for the wireless metropolitan area network technology based on the 802.16 series of the Institute of Electrical and Electronics Engineers ('ΊΕΕΕ"). The basic goal is to provide a metropolitan area network. Broadband wireless access means that can be interoperable effectively in a multi-vendor multi-vendor environment. WiMAX provides broadband wireless connectivity to fixed or mobile devices, and can be used to connect WLA hotspots to the Internet, provide campus connectivity, and serve as a subscriber line for "last mile" broadband access.

(Digital Subscriber Line, DSL) is a wireless alternative to wired broadband access. Its network reference model is shown in Figure 1. Figure 1 shows the WiMAX network reference model, which mainly includes SS/MS (Subscriber Station Mobile Station), ASN (Access Service Network) 12, and NSP (network service provider). CSN (Connection Service Network) of the network service provider 13. CSN14 of the home NSP. The NAP (Network Access Provider) is responsible for providing the ASN network, while the NSP is responsible for providing the CSN network. SS/MS is a commonly known user terminal; ASN is the access network, which is responsible for providing WiMAX wireless access for SS/MS, including base station (BS, Base Station) and gateway (GW, Gateway); ASN is connected through R3 reference point To the CSN, the CSN includes AAA (Authentication, Authorization, and Accounting) servers and functional entities such as HA (Home Agent) to provide authentication, accounting, authorization, and routing of data packets. It is worth mentioning that when the user is in the roaming state, the CSN network of the home NSP (ie H-NSP) and the CSN network of the roaming (or called the visited) NSP (ie V-NSP) are provided for the user. Network connection service.

The WiMAX system adopts cellular technology, and the transmission of air interface data is performed between a base station (Base Station ("BS") and a number of subordinate subscriber stations/mobile stations ("SMS/MS"). Centralized control by the base station. The BS is connected to the Metropolitan Area Network and the Public Switched Telephone Network (PSTN). One SS can access one or more end users and aggregate the Internet Protocol (Internet Protocol) of these users. Referred to as "IP") data, voice traffic, transmitted to the BS over the air interface.

WiMAX has the advantages of long transmission distance and high transmission rate. The wireless signal transmission distance of the BS in WiMAX is up to 50 kilometers, and the coverage area is 10 times that of the 3G base station. It can provide coverage of a large area by building less BS; meanwhile, WiMAX uses orthogonal frequency division multiplexing ( The Orthogonal Frequency Division Multiplexing ('OFDM') modulation scheme can effectively utilize channel resources and can provide transmission rates of up to 70 megabits per second (Mbps).

In order to save the power and air interface resources of the mobile station ("MS"), an idle mode (IDLE) is defined in the IEEE 802.16e standard, and the IDLE mode is a terminal working mode in the mobile broadband wireless access system. The MS in the IDLE mode can move in a large area, and the MS does not have to register with the base station ("Base" for short) in the roaming cell when roaming in this area. At the same time, when the MS roams to different cells, it is not necessary to perform normal operation procedures such as handover. The MS can request to enter the IDLE mode by sending a message. Similarly, BS can also pass Sending a message actively requests the MS to enter the IDLE mode. Whether the MS actively initiates a request to enter the IDLE mode, or the BS actively requests the MS to enter the IDLE mode by sending a message, the MS must complete the process of registering and entering the IDLE mode within a prescribed time.

The existing WiMAX access service network includes a foreign agent (FA), a paging controller (Paging Controller, referred to as "PC"), a location register ("LR"), and the like, and some Several logical entities can be co-located on a physical entity. The PC is used to manage the activity and paging of the MS in the IDLE mode in the network. For each MS in the IDLE mode, there is only one PC to manage its activity, called an anchor PC, but there are one or more PCs. , called a relay PC, is used to relay messages between the MS and the anchor PC. The PC can be implemented as part of the logical entity authenticator in the same physical network element. The physical location may be in the physical network element ASN GW in the WiMAX system or in another independent physical network element. The LR is a distributed database for storing state information, paging information, and service flow related information of the MS. Generally, one PC logical entity corresponds to one LR logical entity, and two logical entities are implemented in the same physical network element. Also in the ASN, there is a Paging Agent ("PA"), which is used to handle the interaction of paging-related functions in PCs and BSs.

The network is usually divided into a number of paging groups (Paging Group, hereinafter referred to as "PG") as needed. One PG consists of one or more PAs and is managed by the network operator. A PG must reside within the scope of a Network Access Provider ("NAP"). A BS and associated PAs can be entities in multiple PGs, as shown in Figure 2.

When the mobile station (Mobile Station, "MS") actively requests to enter the IDLE mode on a certain BS, or a BS instructs the MS to enter the IDLE mode, the MS and the BS, and the BS and the back-end network element ASN The message exchange between the GWs notifies the PC that the MS has entered the IDLE mode, and saves the state information, paging information, and service flow information of the MS in the corresponding LR. The MS may carry information that needs to be reserved when it enters the IDLE mode in the IDLE mode request message sent to the BS, and the BS may also set similar information in the IDLE mode request response message, for notifying the MS to reserve in the LR. Related information, and notify the MS of the ID (identification) of the PC.

When the MS enters the IDLE mode, some security information of the MS is still retained on the anchor Authenticator of the MS, and the information can be used for the MS in the IDLE mode. Secure location updates, secure location updates help MSs recover from IDLE mode faster. In the IDLE mode, the MS needs to periodically initiate a location update request air interface message to the currently located BS, the period of which is determined by a system timer. After receiving the message, the BS sends the location update message of the backend network to the corresponding PC. The PC judges whether the MS enters a new PG based on the message, and if so, updates the corresponding information in the LR.

When the system idle timer on the PC/LR exceeds the maximum time, but the PC/LR still does not receive the location update information of the MS, the MS is considered to be lost. In another case, when the foreign agent ("FA") of the MS receives the forward data packet of the MS, that is, the data packet that the network side needs to send to the MS, the FA notifies the PC/LR to perform the data packet. Paging, when the PC/LR attempts a predefined maximum number of pagings but still does not receive a response from the MS, the MS is also considered to be lost. In addition, when the MS is powered off, it sends a Ranging Request message (R G-REQ ) to the BS, which contains the MS's Shutdown Indicator IE (Information Element).

When the PC/LR considers that the MS has left the network, including the PC/LR knowing that the MS is lost or the MS is shut down, the PC/LR will release all IDLE mode reservation information about the MS to release system resources.

In practical applications, the above solution has the following problems: In the WiMAX system, there is a waste of resources when the MS pages in the IDLE mode.

The main reason for this situation is that when the MS enters the IDLE mode, some security information of the MS will remain on the anchor authentication device of the MS. When the MS leaves the network, including the MS loss or the MS shutdown, the anchor The point authenticator still retains the security related information of the MS. It is useless to keep the information, and it occupies storage space, thus undoubtedly forming a waste of resources. Summary of the invention

In view of this, the embodiments of the present invention provide a method, system, and device for releasing resources in a global access network, so that the anchor authenticator can release relevant resources in time when the mobile station leaves the network.

A method for releasing resources in a global access network for microwave access according to an embodiment of the present invention includes the following steps:

The anchor authenticator receives a notification that the mobile station in the idle state leaves the network, and the notification carries at least one identifier of the mobile station leaving the network;

The security information of the corresponding mobile station is deleted according to the identifier in the notification. A system for releasing resources in a microwave access global interworking network, including an anchor paging controller and a location register, and an anchor authentication device, where

The anchor paging controller and the location register are used to jointly implement management of the mobile station in the idle mode. If the mobile station is informed that the mobile station leaves the network, the anchor authenticator is notified, and the notification carries at least one mobile station leaving the network. Identification

The anchor authenticator is used for authentication of the mobile station, and after receiving the notification from the anchor paging controller and the location register, deletes the security information of the corresponding mobile station according to the identifier therein;

The anchor authentication device includes:

a notification obtaining unit, configured to receive the notification from the anchor paging controller and a location register;

The mobile station information management unit is configured to delete the security information of the corresponding mobile station according to the identifier in the notification.

An anchor point authenticator provided by the embodiment of the present invention includes: a mobile station information storage unit for storing related information of a mobile station, and further comprising:

a notification obtaining unit, configured to receive a notification from the anchor paging controller and the location register, where the notification carries at least one identifier of the mobile station leaving the network;

The embodiment of the present invention provides a computer readable storage medium, where the computer readable storage medium stores software, and when the software is running, performing the following steps:

Receiving a notification that the mobile station in the idle state leaves the network, and the notification carries at least one identifier of the mobile station leaving the network;

The security information of the corresponding mobile station is deleted according to the identifier in the notification.

The technical solution of the embodiment of the present invention informs the anchor authenticator after the anchor PC/LR learns that the mobile station leaves the network, and the notification may carry one or more identifiers of the mobile stations leaving the network, and the anchor authenticator according to these Identifies the security information of the corresponding mobile station. This security information is useless when the mobile station leaves. By deleting these security information, system resources can be released in time, and the utilization of system resources is improved.

DRAWINGS 1 is a schematic diagram of a reference model of a WiMAX network in the prior art;

2 is a schematic diagram of dividing a PG in the prior art;

3A is a structural diagram of a preferred embodiment of a system for dry-distributing resources in the WiMAX of the present invention;

3B is a schematic block diagram of an anchor authentication device in an embodiment of the system of the present invention;

Figure 4 is a flow chart of a first embodiment of the method of the present invention;

Figure 5 is a flow chart of a second embodiment of the method of the present invention;

Figure 6 is a flow chart of a fourth embodiment of the method of the present invention.

detailed description

The invention will be further described in detail below with reference to the accompanying drawings.

The invention is informed by the anchor PC/LR whether the MS in the idle state leaves the network, and the reason for the MS to leave may be MS loss or MS shutdown, etc. If the MS is informed that the MS has left the network, the anchor authenticator is notified, and the notification carries at least one The identifier of the MS leaving the network and the reason why the MS leaves the network; after receiving the notification, the anchor authenticator deletes the security information of the corresponding MS according to the identifier of the MS, and returns a response message to the anchor PC/LR, in the response message. It also contains the MS identity that leaves the network.

The system and method for releasing resources in WiMAX according to the first embodiment of the present invention will be briefly described below in accordance with the principles of the invention.

As shown in FIG. 3A, the system for releasing resources in the WiMA includes an anchor PC/LR31, and an anchor authenticator 32, wherein the anchor PC/LR31 is used to determine the state of the MS, and when it is known that the MS leaves the network, The anchor authenticator 32 is notified. The anchor authenticator 32 is used for authentication of the MS and deletes the security information of the MS leaving the network upon receiving the notification from the anchor PC/LR 31.

Specifically, the anchor PC/LR 31 implements management of the mobile station in idle mode. If it is learned that the MS leaves the network, it sends a message to the anchor authenticator 32 to notify the anchor authenticator 32 that the notification may be a notification. The anchor authenticator has the MS leaving the network, and may also inform the anchor authenticator to delete the information of the mobile station leaving the network, and the identifier of the one or more MSs leaving the network is also included in the notification. After receiving the message from the anchor PC LR31, the anchor authenticator 32 deletes the security information of the corresponding MS that has left the network.

In order to enable the anchor authenticator to effectively manage the security information of the MS, an anchor authentication device is also provided in the embodiment of the present invention, and a schematic block diagram thereof is shown in FIG. 3B:

The method includes: a mobile station information storage unit 321, a notification acquisition unit 322, and a mobile station information management sheet. Yuan 323. The mobile station information storage unit 321 is configured to store related information of the mobile station; the notification obtaining unit 322 is configured to receive the notification from the anchor paging controller/location register; and the mobile station information management unit 323 is configured to The identifier in the notification deletes the security information of the corresponding mobile station.

The preferred embodiment of the system of the present invention has been briefly described above. The method for releasing resources in the WiMAX of the present invention will be described in detail below.

Figure 4 is a flow chart showing the first embodiment of the method of the present invention:

In step 410, the anchor PC/LR learns the current state of the MS.

Then, proceeding to step 42Q, the anchor PC/LR determines whether the MS in the idle state is currently leaving the network, and the reason why the MS leaves the network may be MS loss, or MS shutdown. If there is an MS leaving the network, then step 430 is entered, otherwise, returning to step 410.

The anchor PC/LR can know that the MS leaves the network in various ways, such as by the timer timeout on the anchor PC/LR, or by receiving messages sent by other network entities.

In step 43Q, the anchor PC/LR sends an "MS_Exit-Indication" message to the anchor authenticator, notifying the anchor authenticator that the MS has left the network. The "MS_Exit-Indication" message is dedicated to the notification that the anchor authentication device has the MS leaving the network, and the message includes at least one identifier of the MS that leaves the network, and the identifier may be the MAC address of the MS, to uniquely identify an MS. The message may also include the reason why the MS left the network, such as MS loss or MS shutdown, as shown in Table 1.

Next, proceeding to step 440, the anchor authenticator receives the message from the anchor PC/LR, and deletes the security information of the corresponding MS according to the MS identifier in the message. These security information is no longer useful when the MS leaves. By deleting these security information, system resources can be released in time, which improves the system resources. Utilization rate.

Next, proceeding to step 450, the anchor authenticator returns a corresponding message "MS_Exit_Response" to the anchor PC/LR, and the message also includes the identifier of the MS leaving the network.

The flow of the second embodiment of the method for releasing resources in the WiMAX of the present invention is as shown in FIG. 5. Steps 510 and 52Q correspond to step 410 and step 420, and details are not described herein again.

Through steps 510 and 520, the anchor PC/LR detects that the MS has left the network. In step 530, the anchor PC/LR sends an extended "MS_Info_Request" message to the anchor authenticator, and then notifies The anchor authenticator has left the network MS. In addition to the original elements, the "MS_Info_Request" message also adds an information element, namely "MS_Exit-Improve", to indicate the identity of the MS leaving the network, as shown in Table 2. Show.

Table 2

Next, proceeding to step 540, the anchor authenticator deletes the security information of the MS that has left the network according to the "MS_Exit-Identifier" element in the received message.

Next, proceeding to step 550, the anchor authenticator sends an "MS_Info_Response" message to the anchor PC/LR as a response to the "MS_Info_Request" message. Similarly, in the "MS_Info_Response", in addition to the original elements, a new information element, "MS_Exit_Response", is added to the message, which is also used to indicate the MS identity of the leaving network, as shown in Table 3. Information element description mandatory or optional comment

MS ID MS MAC address is mandatory for specifying the MS that receives the message. BS ID base station identity is mandatory for indicating the base station to which the MS is registered

Anchor Authenticator ID Anchor Authenticator ID Optional Anchor Authenticator ID

AK authorization key optional

AK context authorization key context mandatory

MS—Exit— Response ID MS leaves the network Optional

This embodiment is substantially the same as the first embodiment except that the first embodiment transmits an information element indicating the MS identity leaving the network by adding a dedicated message, and the present embodiment passes the existing "MS-Info". Request" and "MS_Info_Response", the message is extended, and the "MS_Exit-Identifier" and "MS_Exit-Response" elements are added respectively, and the MS identifiers leaving the network are indicated by these two elements.

The method for releasing resources in WiMAX according to the third embodiment of the present invention is substantially the same as that of the first embodiment, except that in the first embodiment, the anchor PC/LR directly sends a notification that the MS leaves the network to the anchor authenticator. In the present embodiment, the anchor PC/LR is forwarded by one or more other network entities, and the notification that the MS leaves the network is sent to the anchor authenticator indirectly. For example, the anchor PC/LR only informs the FA of an MS that the MS has left the network, and the FA in turn notifies the anchor authenticator that the MS has left the message.

The method for releasing resources in WiMAX according to the fourth embodiment of the present invention is substantially the same as that of the third embodiment, except that in the third embodiment, the anchor PC/LR transparently forwards the MS leaving the network through one or more other network entities. The notification to the anchor authenticator. In this embodiment, the anchor PC/LR sends a notification that the MS leaves the network to one or more other network entities, and other network entities generate a new notification after receiving the notification (including the indication that the MS leaves the network), directly Or indirectly sent to the anchor authenticator. Specifically, as shown in Figure 6:

After the PC/LR finds that the MS has left the network (the reason may be that the MS is shut down or the paging fails or the location update times out), the message MS_Info_Request is sent to the FA, where the message may also be a new message MS JExit_Indication, or other message. . After the FA receives the message that the MS leaves, the FA sends an R3 Session Release Request message to the anchor authenticator, indicating that one or more MSs leave the network, and the anchor authenticator receives the message and sends the R3 Session. Release Response The message is sent to the FA, and the FA sends an MS_Info_Response message to the PC/LR.

In the above embodiments, the anchor paging controller and the location register are described to know that after the mobile station leaves the network, a notification message is sent to the anchor authenticator to notify the anchor authenticator that the mobile station is leaving. The present invention is not limited to such a notification message, and may also notify the anchor authenticator to delete the mobile station information leaving the network, and the implementation process thereof is also applicable to the case described in the above embodiments, that is, the notification may be sent through a dedicated message, or may be Extended existing message delivery notification; the notification can be sent directly or indirectly to the anchor authenticator. The specific implementation process is similar to the above, and will not be described here.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, and the program is executed. When, include the following steps:

The storage medium is, for example, a ROM RAM, a magnetic disk, an optical disk, or the like.

It can be seen from the foregoing embodiment of the present invention that after the anchor PC/LR learns that the mobile station leaves the network, it notifies the anchor authenticator that one notification may carry one or more identifiers of the mobile stations leaving the network, and the anchor authenticator according to the These identifiers delete the security information of the corresponding mobile station. These security information is useless when the mobile station leaves. By deleting these security information, system resources can be released and released in time, which improves the utilization of system resources. The anchor PC/LR notifies the anchor authenticator that when the mobile station leaves the network, it can use the newly added message or use the extended existing message, such as MS_Info_Request message and MS_Info_Response message.

Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

Rights request

A method for releasing resources in a global interworking network for microwave access, characterized in that the method comprises the following steps:

The method for releasing resources in a global access network of a microwave access according to claim 1, wherein the method further comprises the following steps:

After receiving the notification, the anchor authenticator returns a response message.

3. The method for dry-distributing resources in a microwave access global interworking network according to claim 2, wherein the notification is transmitted by a dedicated message; the response message is a dedicated message.

The method for releasing resources in a microwave access global interworking network according to claim 2, wherein the notification is transmitted through an extended existing message; the response message is an extended existing message.

The method for releasing resources in a microwave access global interworking network according to claim 1, wherein the notification includes, as an option, a reason why the mobile station leaves the network.

6. The method for releasing resources in a microwave access global interworking network according to claim 5, wherein the reason why the mobile station leaves the network comprises a mobile station loss or a mobile station shutdown.

7. The method of releasing resources in a microwave access global interworking network according to claim 1, wherein the anchor authenticator receives the notification directly or indirectly from an anchor paging controller and a location register.

A system for releasing resources in a global access network of a microwave access, comprising: an anchor paging controller and a location register, and an anchor authenticator, wherein

The anchor authentication device includes: a notification obtaining unit, configured to receive the notification from the anchor paging controller and a location register;

An anchor authentication device, comprising: a mobile station information storage unit for storing related information of the mobile station, further comprising:

10. A computer readable storage medium shield, wherein the computer readable storage medium stores software, and when the software is running, performing the following steps: