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WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and switching method thereof

A technology without fixed and anchor points, applied in the field of handover in the field of communication technology, it can solve problems such as aggravating transmission delay and wasting bandwidth, dual identities of IP addresses, and detours of data packets.

Inactive Publication Date: 2011-07-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] To sum up, the handover in the existing WiMAX system requires the support of fixed anchor points to complete. The introduction of fixed anchor points brings about the problem of circuitous data packet paths, which increases transmission delay and bandwidth waste.
Applying the access identification and location separation technology to the WiMAX network can theoretically support the mobility of WiMAX traditional terminals without a fixed anchor point, solve the problem of roundabout data packet paths, and also achieve the purpose of solving the dual identity of IP addresses, but How to realize handover without a fixed anchor point based on the WiMAX system, there is no relevant solution at present

Method used

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  • WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and switching method thereof
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  • WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and switching method thereof

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Experimental program
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Effect test

corresponding Embodiment 2

[0182] 1. (Corresponding to Embodiment 2) the switch-out control module is also used to send the identification information of the source ILCR to the target AGW; the switch-in control module is also used to send the source ILCR The identification information of the ILCR is sent to the target ILCR; the tunnel establishment module in the ILCR is used to establish a forwarding tunnel to the source ILCR according to the received identification information of the source ILCR;

[0183] 2. (Corresponding to Embodiment 3) the switch-in control module is also used to send the identification information of the target ILCR to the source AGW; the switch-out control module is also used to send the received target ILCR different from the source ILCR The identification information of the target ILCR is sent to the source ILCR; the tunnel establishment module in the ILCR is configured to establish a forwarding tunnel to the target ILCR according to the received identification information of th...

Embodiment 1

[0197] Figure 5 It is the first flow chart based on system 1 to realize handover of terminals without a fixed anchor point. During the handover process, the forwarding tunnel between AGWs is used for data forwarding. The specific steps are described as follows:

[0198] Step 501, when the terminal in the connected state moves and completes the handover of W-ASN anchoring, the terminal switches from the source base station to the target base station, and a data channel is established between the source AGW and the target AGW;

[0199] Unless otherwise specified, the terminal mentioned in the process refers to the terminal where the handover occurs, and other embodiments are the same.

[0200] The terminal can complete the handover of W-ASN anchoring according to the existing standard. After the data channel is established between the source AGW and the target AGW, the uplink and downlink data packet paths of the terminal are as shown in D501 and D502:

[0201] D501, downlink...

Embodiment 2

[0281] This embodiment is based on the network architecture of the WiMAX system using the identity identification and location separation technology of system 1. In the process of realizing handover without a fixed anchor point, the forwarding tunnel between ILCRs is used for data forwarding, and the target ILCR initiates the inter-ILCR In the scenario where the forwarding tunnel is established, the specific steps are as follows:

[0282] Steps 601 and 602 are the same as steps 501 and 502;

[0283] D601 and D602 are the same as D501 and D502.

[0284] In the process of sending the data message, the source AGW reports and updates the communication peer information to the terminal's home ILR, and optionally maintains and updates the locally stored communication peer information.

[0285] Step 603: After the source AGW receives the target access gateway anchor DPF handover trigger message, or when the source AGW decides to initiate AGW relocation, the source AGW sends an anchor...

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Abstract

The invention relates to a WiMAX (Worldwide Interoperability for Microwave Access) system for switching without fixed anchors and a switching method thereof. In the system, an ILCR (Identity Location Control Router) is used for distributing a new location identification for a terminal when the terminal is switched in, releasing resources distributed for the terminal after the terminal is switched out and forwarding data messages for switching the terminal in and out; an AGW (W-ASN Gateway) is used for realizing W-ASN (Wimax Access Service Network)-anchored switching of the terminal, selecting a target ILCR for the switched-in terminal, building a tunnel between the switched-in terminal and the target ILCR and forwarding data messages of the terminal through the tunnel; the ILCR or the AGW is also used for registering the new location identification of the terminal to an ILR (Identity Location Register) of the terminal; and the ILR is used for registering and updating the location identification of the terminal and transmitting a location identification updating notification to all gateways accessed from correspondent nodes of the terminal after receiving a triggering message for updating the correspondent nodes. Through the method and system disclosed by the invention, the switching without fixed anchors can be realized, path circuity of data packages is reduced and transmission delay and bandwidth wastes are decreased.

Description

technical field [0001] The invention relates to handover in the technical field of communication, in particular to a Wimax system and a handover method for realizing handover without a fixed anchor point. Background technique [0002] In the traditional Transmission Control Protocol / Internet Protocol (Transmission Control Protocol / Internet Protocol, TCP / IP) network environment, IP provides the routing function for the Internet (Internet), and it assigns logical addresses to all nodes (including hosts and routers) , that is, the IP address, and each port of each host is assigned an IP address. An IP address includes a network prefix and a host part. The IP addresses of all hosts on the same link usually have the same network prefix but different host parts. This enables IP to perform route selection based on the network prefix part of the IP address of the destination node, so that the router can save a simple network prefix route in order, instead of saving a separate route...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/12H04W40/36
CPCH04W60/00H04W76/022H04W92/24H04W36/00H04W40/36H04W76/12H04W36/0064
Inventor 霍玉臻吴强符涛
Owner ZTE CORP
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