CN101494565B

CN101494565B - Method for Handling Node Failure in Distributed Wireless Access System

Info

Publication number: CN101494565B
Application number: CN2008100567685A
Authority: CN
Inventors: 邓辉; 李茗; 魏冰; 王晓云; 黄晓庆
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2008-01-24
Filing date: 2008-01-24
Publication date: 2011-01-26
Anticipated expiration: 2028-01-24
Also published as: CN101494565A

Abstract

The invention discloses a method for processing node failure in a distributed wireless access system. The method comprises the following steps: after determining that a first network subnode within the self control range has a fault, a network main node utilizes a notification message used for prompting notification message to adjust the network resource by a network layer protocol encapsulation and a notification message based on the protocol encapsulation of an MAC layer and a network layer protocol and transmits the notification messages to other network subnodes which have safety relationwith the first network subnode; and after receiving the notification message, the other network subnodes carry out corresponding adjustment to self network resources, utilizes a reply message used for notifying that the adjustment of the network resources is completed by the network layer protocol encapsulation and a reply message based on the protocol encapsulation of the MAC layer and the network layer protocol and returns the notification messages to the network main node. Therefore, when a certain network subnode has a fault, other network subnodes which have safety relation with the network subnode can complete adjustment of the network resources without carrying out protocol conversion, thus simplifying operation process to a certain extent, improving the interoperability of all thenetwork nodes, and further reducing the operation cost of the system. The invention discloses a corresponding communication device and a communication system simultaneously.

Description

The method of handle node failures in the distributed wireless connecting system

Technical field

The present invention relates to the communications field, particularly a kind ofly insert method, the Apparatus and system of handle node failures in the bamboo weaving at distributed wireless.

Background technology

In the existing distributed wireless access system, when a network node (for example, the base station) when breaking down, other network nodes use the MAC agreement to carry out information interaction, thereby finish follow-up Internet resources adjustment.

But adopt the MAC agreement to carry out the Internet resources adjustment between each network node and have following shortcoming: interoperability is relatively poor.Because each network node does not use unified MAC protocol, the MAC agreement that the network node that different vendor produces all uses it to dispose voluntarily; And the existing distributed wireless access system generally all adopts multivendor solution (promptly using the network node of a plurality of manufacturers produce), use the MAC agreement to carry out the Internet resources adjustment so between each network node and just can cause frequent protocol conversion, this has just improved the cost of system's operation greatly.

Summary of the invention

The embodiment of the invention provide a kind of in the distributed wireless connecting system method, the Apparatus and system of handle node failures, when breaking down, simplify follow-up handling process in order to the network node in the distributed wireless connecting system.

The concrete technical scheme that the embodiment of the invention provides is as follows:

A kind of in the distributed wireless connecting system method of handle node failures, comprising:

Network host node utilizes the network layer protocol encapsulation to be used to point out the notification message of adjusting Internet resources after determining that the first interior network child node of self control range breaks down;

Described network host node is based on the notification message of MAC protocol encapsulation layer protocol Network Based, and sends to other network child nodes that have security association with the described first network child node;

After described other network child nodes receive described notification message, the self networks resource is adjusted accordingly, and utilize the network layer protocol encapsulation to be used to the answer message of informing that the Internet resources adjustment finishes;

Described other network child nodes are based on the answer message of MAC protocol encapsulation layer protocol Network Based, and should reply message and be back to described network host node.

A kind of communicator comprises:

First processing unit is used for determining that the first network child node in this communicator control range breaks down;

Communication unit is used for being used to point out the notification message of adjusting Internet resources to existing other network child nodes of security association to send with the described first network child node;

Second processing unit is used for layer protocol Network Based encapsulation described notification message is encapsulated, and based on the notification message of MAC protocol encapsulation layer protocol Network Based.

A kind of communicator comprises:

Communication unit is used to receive that network host node sends is used to point out the notification message of adjusting Internet resources, and returns to described network host node and to be used to the answer message of informing that the Internet resources adjustment finishes;

First processing unit is used for layer protocol Network Based described answer message is encapsulated, and encapsulates based on the answer message of MAC agreement to layer protocol Network Based;

Second processing unit is used for corresponding Internet resources are adjusted.

A kind of communication system comprises network host node, the first network child node that breaks down and has other network child nodes of security association with this first network child node,

Network host node, after being used for determining that the first interior network child node of self control range breaks down, utilize the network layer protocol encapsulation to be used to point out the notification message of adjusting Internet resources, and based on the notification message of MAC protocol encapsulation layer protocol Network Based, and this notification message sent to other network child nodes that have security association with the described first network child node;

Other network child nodes, after being used to receive described notification message, the self networks resource is adjusted accordingly, and utilize the network layer protocol encapsulation to be used to the answer message of informing that the Internet resources adjustment finishes, and based on the answer message of MAC protocol encapsulation layer protocol Network Based, and this notification message is back to described network host node.

In the embodiment of the invention, when certain the network child node in the distributed wireless connecting system breaks down, the network host node of this network child node ownership, and exist other network child nodes of security association the interactive messages content to be encapsulated by network layer protocol with this network child node, and encapsulate once more based on the message of MAC agreement to the encapsulation of network layer protocol, to finish the adjustment of Internet resources, so just, need not between each network node, to carry out protocol conversion, thereby simplified operating process to a certain extent, improve the interoperability between each network node, and then reduced system operation cost.The present invention discloses corresponding communication device and communication system.

Description of drawings

Fig. 1 is a distributed wireless connecting system system assumption diagram in the embodiment of the invention;

Fig. 2 is a master node functionality structure chart in the embodiment of the invention;

The network child node functional structure chart of Fig. 3 for not breaking down in the embodiment of the invention;

Fig. 4 A is that first kind of host node handled child node fault schematic diagram in the embodiment of the invention;

Fig. 4 B is that host node is handled child node fault flow chart in the embodiment of the invention;

Fig. 5 is that second kind of host node handled child node fault schematic diagram in the embodiment of the invention.

Embodiment

In the distributed wireless connecting system, when certain network child node breaks down, in order to simplify follow-up handling process, in the embodiment of the invention, after network host node determines that the first interior network child node of self control range breaks down, utilize network layer protocol encapsulation to be used to point out the notification message of adjusting Internet resources, and based on the notification message of MAC protocol encapsulation layer protocol Network Based, and send it to other network child nodes that have security association with the described first network child node; After described other network child nodes receive described notification message, the self networks resource is adjusted accordingly, and utilize the network layer protocol encapsulation to be used to the answer message of informing that the Internet resources adjustment finishes, and based on the answer message of MAC protocol encapsulation layer protocol Network Based, and should reply message and be back to described network host node.

In the present embodiment, each network node adopts between the wireless universal IP access point of layer protocol Network Based agreement, and (Generic Inter Access point Protocol, GIAP) agreement encapsulates mutual to each other various message.

Partly be that example also is elaborated to the preferred embodiment of the present invention in conjunction with the accompanying drawings only below with the flow process that message is encapsulated according to the GIAP agreement.

Consult shown in Figure 1, in the embodiment of the invention, there are a plurality of radio access nodes (comprising host node 10 and child node 11) in the distributed wireless connecting system, wherein, host node 10 is connected with authentication and authorization charging (AAA) server 12 and dynamic address allocation (DHCP) server 13 respectively by Ethernet/optical fiber (shown in solid line part among Fig. 1), and each child node 11 is connected with host node 10 and adjacent other child nodes 11 respectively by wireless mode (shown in dotted portion among Fig. 1).

Host node 10, be used for determining that certain interior child node 11 of self control range breaks down, and to existing other child nodes 11 of security association to send the notification message that is used to point out the adjustment Internet resources with the child node 11 that breaks down, wherein, host node 10 encapsulates described notification message according to the GIAP agreement;

Child node 11, be used for after receiving above-mentioned notification message, the self networks resource being adjusted accordingly, and return to host node 10 and to be used to the answer message of informing that the Internet resources adjustment finishes, wherein, child node 11 encapsulates the answer message that self sends according to the GIAP agreement.

In addition, as shown in Figure 1, also comprise authentication and authorization charging (AAA) server 12 and dynamic address allocation (DHCP) server 13 in the system, wherein, host node 10 is connected with aaa server 12 and Dynamic Host Configuration Protocol server 13 respectively by Ethernet/optical fiber (shown in solid line part among Fig. 1), and each child node 11 is connected with host node 10 and adjacent other child nodes 11 respectively by wireless mode (shown in dotted portion among Fig. 1).

Consult shown in Figure 2ly, in the present embodiment, host node 10 comprises first processing unit 100, communication unit 101 and second processing unit 102.

First processing unit 100 is used for determining that certain child node 11 in host node 10 control ranges breaks down;

Communication unit 101 is used for being used to point out the notification message of adjusting Internet resources to existing other child nodes 11 of security association to send with the child node 11 that breaks down;

Second processing unit 102 is used for according to the GIAP agreement above-mentioned notification message being encapsulated, and based on the notification message of MAC protocol encapsulation based on the GIAP agreement;

Except that the above-mentioned functions module, as shown in Figure 2, host node 10 also comprises the 3rd processing unit 103, be used for when first processing unit 100 determines that certain child node 11 breaks down, remove the IPsec secure tunnel between this node and this child node 11 and delete the relevant information of this child node 11 in this locality.

Consult shown in Figure 3ly, in the embodiment of the invention, child node 11 comprises communication unit 110, first processing unit 111 and second processing unit 112.

Communication unit 110 is used to receive that host node 10 sends is used to point out the notification message of adjusting Internet resources, and returns to this host node 10 and to be used to the answer message of informing that the Internet resources adjustment finishes;

First processing unit 111 is used for according to the GIAP agreement above-mentioned answer message being encapsulated. and based on the answer message of MAC protocol encapsulation based on the GIAP agreement;

Second processing unit 112 is used for corresponding Internet resources are adjusted.

Based on the said system framework, consult shown in Fig. 4 A, in the present embodiment, under first kind of situation, the node A1 that breaks down is not used as via node and uses, and node A1, node A2 and node A3 are the child node of node A, so, consult shown in Fig. 4 B, in the present embodiment, the detailed process of the first method of node A processing node A1 fault is as follows:

Step 400: node A surpasses setting threshold to the number of times that node A1 sends the test post (hereinafter referred to as message 1) that is used to grasp its connected state continuously, and does not receive the response message of node A1 all the time.

In actual applications, node A sends message 1 according to setting cycle to each child node, and when the number of times that sends message 1 to a child node continuously surpasses setting threshold and do not receive corresponding response message, determines that this child node breaks down.

In the present embodiment, node A has multiple implementation according to the GIAP protocol encapsulation message 1 based on the IP layer protocol; For example, according to the mode encapsulation messages 1 shown in the table 1, wherein,, can carry other relevant informations (as the defined node information load, node prefix load, host node sign load etc.) according to concrete environment at the expansion (Extensions) of message 1.Then, node A is based on the message 1 of MAC protocol encapsulation based on the GIAP agreement.

Table 1

Step 410: node A determines that node A1 breaks down.

Step 420: the IPsec secure tunnel between node A dismounting self and the node A1.

Step 430: node A carries out the notification message (hereinafter referred to as message 2) that Internet resources are adjusted, informs that node A1 breaks down to existing the node A2 of security association to send to be used to point out with node A1.

Table 2

In the present embodiment, node A has multiple implementation according to the GIAP protocol encapsulation message 2 based on the IP layer protocol; For example, according to the mode encapsulation messages 2 shown in the table 2, wherein,, can carry other relevant informations (as the defined node information load, node prefix load, host node sign load etc.) according to concrete environment at the expansion (Extensions) of message 2.Then, node A is based on the message 2 of MAC protocol encapsulation based on the GIAP agreement;

Step 440: the IPsec secure tunnel between node A2 dismounting self and the node A1.

When removing the peace tunnel, node A2 also will also delete other information relevant with node A2 that preserve this locality, for example, and the routing iinformation of node A2, address information, device identification and security association information etc.

Certainly, shown in Fig. 4 A, the node A3 that node A also needs condition notification that node A1 is broken down and node A1 to have security association makes it make the handling process same with node A2, does not repeat them here.

On the other hand, in above-mentioned flow process, node A also should notify aaa server to delete the information relevant with node A1 respectively in this locality with Dynamic Host Configuration Protocol server after definite node A1 breaks down, and also repeats no more at this.

Step 450: node A2 returns the response message (hereinafter referred to as message 3) that is used for informing network resource adjusted and finishes to node A.

In the present embodiment, node A2 has multiple implementation according to the GIAP protocol encapsulation message 3 based on the IP layer protocol; For example, according to the mode encapsulation messages 3 shown in the table 3, wherein,, can carry other relevant informations (as the defined node information load, node prefix load, host node sign load etc.) according to concrete environment at the expansion (Extensions) of message 3.Then, node A is based on the message 3 of MAC protocol encapsulation based on the GIAP agreement;

Table 3

Be different from the foregoing description, consult shown in Figure 5, when node A4 communicated by via node node A1 and node A, node A was sent to the described first network child node according to setting cycle by the test post that node A1 will be used to grasp node A4 connection status.And when definite node A4 breaks down, exist other nodes of security association to carry out corresponding Internet resources adjustment with node A4 by the flow process indication similar to step 400-450, do not repeat them here.

In sum, in the embodiment of the invention, when certain child node 11 in the distributed wireless connecting system breaks down, the host node 10 of these child node 11 ownership, and exist other child nodes 11 of security association the interactive messages content to be encapsulated by network layer protocol with child node 11, and encapsulate once more based on the message of MAC agreement to the encapsulation of network layer protocol, to finish the adjustment of Internet resources, so just, need not between each network node, to carry out protocol conversion, thereby simplified operating process to a certain extent, improve the interoperability between each network node, and then reduced system operation cost.The present invention discloses corresponding communication device and communication system.

Obviously, those skilled in the art can carry out various changes and modification to the embodiment among the present invention and not break away from the spirit and scope of the present invention.Like this, if these in the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the embodiment among the present invention also is intended to comprise these changes and modification interior.

Claims

1. A method for handling node faults in a distributed wireless access system, characterized in that, comprising:

After the network master node determines that the first network sub-node within its own control range fails, it uses the network layer protocol to encapsulate a notification message for prompting the adjustment of network resources;

The network master node encapsulates the notification message based on the network layer protocol based on the MAC protocol, and sends it to other network subnodes that have security associations with the first network subnode;

After receiving the notification message, the other network sub-nodes adjust their own network resources accordingly, and use a network layer protocol to encapsulate a reply message for notifying that the network resources have been adjusted;

The other network sub-nodes encapsulate the reply message based on the network layer protocol based on the MAC protocol, and return the reply message to the network master node.

2. The method according to claim 1, wherein the network master node sends a test message for grasping the connection state of the first network sub-node to the first network sub-node according to a set period, and When the number of times the test message is continuously sent exceeds a set threshold and no reply is received, it is determined that the first network subnode is faulty, wherein the network master node encapsulates the test message based on a network layer protocol , and encapsulate the test message based on the network layer protocol based on the MAC protocol.

3. The method according to claim 2, wherein the network master node directly sends the test message to the first network sub-node, or forwards the test message through a corresponding relay node to the first network child node.

4. The method according to claim 1, characterized in that, when other network sub-nodes that have a security association with the first network sub-node adjust their own network resources, they respectively dismantle themselves and the first network sub-node. The IPsec security tunnel between nodes deletes the relevant information of the first network sub-node locally, and returns a reply message to the network master node to inform that the network resources are adjusted, wherein the other network sub-nodes are based on The network layer protocol encapsulates the reply message sent by itself, and encapsulates the reply message based on the network layer protocol based on the MAC protocol.

5. The method according to any one of claims 1-4, wherein the network master node removes the communication between itself and the first network subnode after determining that the first network subnode fails. The IPsec security tunnel and locally delete the relevant information of the first network sub-node.

6. The method according to claim 5, wherein after the network master node determines that the first network sub-node fails, it notifies the authentication, authorization and accounting server and the dynamic address allocation server to delete the first network sub-node locally respectively. Relevant information of a network child node.

7. A communication device, characterized in that it comprises:

The first processing unit is configured to determine that the first network sub-node within the control range of the communication device fails;

A communication unit, configured to send a notification message for prompting adjustment of network resources to other network subnodes that have a security association with the first network subnode;

The second processing unit is configured to encapsulate the notification message based on the network layer protocol, and encapsulate the notification message based on the network layer protocol based on the MAC protocol.

8. The communication device according to claim 7, wherein the communication unit sends a test message for grasping the connection state of the first network sub-node to the first network sub-node according to a set period, so When the first processing unit finds that the number of times the communication unit has continuously sent the test message exceeds the set threshold and no reply is received, it determines that the first network sub-node is faulty, wherein the second processing unit is based on The network layer protocol encapsulates the test message, and encapsulates the test message based on the network layer protocol based on the MAC protocol.

9. The communication device according to claim 8, further comprising:

The third processing unit is configured to tear down the IPsec security tunnel between the communication device and the first network sub-node and delete the first network sub-node locally when the first processing unit determines that the first network sub-node fails. Information about network child nodes.

10. A communication device, characterized in that it comprises:

The communication unit is configured to receive a notification message sent by the network master node for prompting to adjust network resources, and return a reply message to the network master node for notifying that the network resource adjustment is completed;

The first processing unit is configured to encapsulate the reply message based on the network layer protocol, and encapsulate the reply message based on the network layer protocol based on the MAC protocol;

The second processing unit is configured to adjust corresponding network resources.

11. The communication device according to claim 10, wherein when the second processing unit adjusts corresponding network resources, it removes the IPsec security tunnel between itself and the first network node, and deletes the tunnel locally. Relevant information of the first network child node.

12. A communication system, comprising a network master node, a failed first network sub-node and other network sub-nodes that have security associations with the first network sub-node, characterized in that,

The network master node is used to determine that after the failure of the first network sub-node within the scope of its own control, use the network layer protocol to encapsulate the notification message used to prompt the adjustment of network resources, and encapsulate the notification message based on the network layer protocol based on the MAC protocol, and sending the notification message to other network subnodes that have security associations with the first network subnode;

Other network sub-nodes are used to adjust their own network resources accordingly after receiving the notification message, and use the network layer protocol to encapsulate the reply message for notifying that the network resource adjustment is completed, and encapsulate the information based on the network layer protocol based on the MAC protocol. , and return the reply message to the network master node.

13. The communication system according to claim 12, wherein the network master node sends a test message for grasping the connection state of the first network sub-node to the first network sub-node according to a set period, And when the number of times the test message is continuously sent exceeds the set threshold and no reply is received, it is determined that the first network sub-node is faulty, wherein the network master node performs the test message based on the network layer protocol Encapsulate, and encapsulate the test message based on the network layer protocol based on the MAC protocol.

14. The method according to claim 13, wherein the network master node directly sends the test message to the first network sub-node, or forwards the test message through a corresponding relay node to the first network child node.

15. The communication system according to claim 12, 13 or 14, characterized in that, after receiving the notification message, other network sub-nodes that have a security association with the first network sub-node remove their connection with the first network sub-node respectively. The IPsec security tunnel between the first network sub-nodes respectively deletes the relevant information of the first network sub-node locally, and returns a reply message for informing the network resource adjustment to the network master node, wherein the other The network sub-node encapsulates the reply message sent by itself based on the network layer protocol, and encapsulates the reply message based on the network layer protocol based on the MAC protocol.