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Method, device and system for switching in wireless relay network

A wireless relay network and network technology, applied in the field of fast switching, can solve the problems of increasing the amount of link layer switching signaling interaction, increasing link layer switching delay, affecting system switching performance, etc., and reducing signaling interaction. , Improve switching performance, optimize the effect of switching process

Inactive Publication Date: 2011-08-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the wireless relay network of the prior art, due to the introduction of the relay, the amount of signaling interaction of the link layer handover is increased, which increases the delay of the link layer handover, and the handover in the wireless relay network The process is longer, which greatly affects the switching performance of the system

Method used

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  • Method, device and system for switching in wireless relay network
  • Method, device and system for switching in wireless relay network
  • Method, device and system for switching in wireless relay network

Examples

Experimental program
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Embodiment 2

[0053] Embodiment 2: with the above figure 2 The shown networking structure is taken as an example. Embodiment 2 is the process of switching when the access router has the function of a wireless metropolitan area network access gateway under the a priori switching process, as shown in image 3 Shown is a schematic diagram of signaling interaction in the handover process described in Embodiment 2, image 3 Include four processes:

[0054] Process 1. Discovery of link layer target access point and handover request process

[0055] 1) The discovery and scanning process of the target access point.

[0056] This process occurs before the mobile terminal performs handover, and is used to determine whether the mobile terminal needs to be handed over. In the specific implementation process, it can be implemented in the following ways:

[0057] When a mobile terminal (MN) stays in a subnet, it periodically listens to neighbor notification broadcast messages (MOB_NBR- ADV), wherein...

Embodiment 3

[0072] Embodiment 3: still with above-mentioned figure 2 The shown networking structure is taken as an example. Embodiment 3 is a process of handover when the access router does not have the function of a wireless metropolitan area network access gateway under the a priori handover process, as shown in Figure 4 Shown is a schematic diagram of signaling interaction in the handover process described in Embodiment 3, Figure 4 It also includes four processes:

[0073] The difference from the above-mentioned embodiment 2 is that since the access router does not have the function of a wireless metropolitan area network access gateway, then in the handover request process of process 1:

[0074] When MR-BS2 receives the MS_Context-REQ message, it generates a new care-of-address according to the MAC address of the MN carried in the MS_Context-REQ, and then performs duplicate address detection (DAD) on the new care-of-address through AR2.

[0075] Specifically, MR-BS2 sends a neigh...

Embodiment 4

[0080] Embodiment 4: still with above-mentioned figure 2 The shown networking structure is taken as an example. Embodiment 4 is a handover process that occurs under a priori handover process, such as Figure 5 Shown is a schematic diagram of signaling interaction in the handover process described in Embodiment 4, Figure 5 It also includes four processes:

[0081] Different from the above-mentioned embodiment 2, the present embodiment 4 uses the interaction of the routing proxy message (RtSolPr) and the proxy routing broadcast message (PrRtAdv) to judge the cross-subnet handover in advance, and the specific process is as follows:

[0082] After receiving the handover request message MOB_MSHO-REQ from the MN, MR-BS1 sends a user context request message MS_Context-REQ to MR-BS2, which carries information such as the MN's MAC address, BSID, requested bandwidth, and QoS; - After receiving the MS_Context-REQ message, BS2 judges for RS5 whether it can meet the service requirement...

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Abstract

The embodiment of the invention provides a method, device and system for switching in a wireless relay network. The method comprises the following steps of: when the current access point receives a switching request message transmitted by a mobile terminal, obtaining a subnetwork prefix of a network in which a target access point is located; then judging whether the subnetwork prefix of the network in which the target access point is located is consistent with the subnetwork prefix of the network in which the current access point is located or not; if not, judging to be cross-subnetwork switching; and then transmitting a fast binding update (FBU) message from the current access point to the current access router. Accordingly, whether the switching is cross-subnetwork switching or not can be judged in advance, thus the switching process is accelerated, the network layer switching is triggered by utilizing the current access point instead of the mobile terminal, the signaling interaction between the mobile terminal and the current access point is reduced, the switching process is optimized, and thus the switching performance of the system is improved.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method, device and system for fast switching in a wireless relay network. Background technique [0002] At present, with the increasing demand of users for wireless Internet network, the new generation of wireless communication system needs to provide higher transmission rate, better signal coverage and stronger mobility, so that users can get good access through wireless transmission. into the service. In recent years, the Worldwide Interoperability for Microwave Access (WiMAX, Worldwide Interoperability for Microwave Access) system has received widespread attention in the market, but the coverage radius of the base station of the WiMAX system in the urban area may only be a few kilometers, and the data transmission rate varies with the user terminal and the base station. The distance decreases with the increase of the distance, especially the signal of the user at the ed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/24
Inventor 李云庄宏成王莹刘占军赵为粮
Owner HUAWEI TECH CO LTD
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