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Mobility management method and mobile access gateway

A technology of a mobile access gateway and a management method, which is applied in the field of mobile access gateway and mobility management, and can solve problems such as packets cannot be forwarded smoothly

Active Publication Date: 2013-01-16
江苏盐综产业投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a mobility management method and a mobile access gateway to solve the problem that messages cannot be forwarded smoothly after MAG switching

Method used

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  • Mobility management method and mobile access gateway
  • Mobility management method and mobile access gateway
  • Mobility management method and mobile access gateway

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0086] Figure 5 It is the first embodiment of the present invention. Embodiment 1 of the mobility management method provides a handover management mechanism, which specifically includes the following steps:

[0087] Step 501: During the moving process of the MN, according to the prior art, the process of switching the MN from sMAG to tMAG is triggered, for example, when the MN moves from the service area of ​​sMAG to the service area of ​​tMAG. At this time, the sMAG needs to obtain the address information of the tMAG (for example, the IP address of the tMAG), or the CoA allocated by the tMAG to the MN (called a new CoA), or obtain the above address and the new CoA at the same time.

[0088] Preferably, the sMAG can obtain the address information and the new CoA of the above-mentioned tMAG from the anchor point LMA (LMA-MN) of the MN or the tMAG.

[0089] Steps 502a-502c: the peer CN of the MN sends an IP message (called downlink data) to the MN, and the IP message first rea...

Embodiment 2

[0099] As mentioned above, in order to avoid path waste, the MAG-MN needs to know the address of the MAG-CN (or the CoA of the CN). When the MAG-MN does not have relevant information, it needs to query other external network elements.

[0100] In order to avoid frequent inquiries (you can't inquire once every time you receive an IP message sent to the CN by an MN), the present invention also proposes that the MAG-MN needs to cache the address of the above-mentioned MAG-CN or the CoA of the CN locally, At the same time, the HoA or HNP or ID of the CN is used as an index to form a mapping relationship of the peer node, such as the HoA or HNP or ID of the CN, which is mapped to the MAG-CN address or the CoA of the CN, referred to as the peer mapping relationship (Correspondent Node Relationship, CNR). It is worth noting that when the MN has more than one CN, the MAG-MN needs to cache multiple above-mentioned correspondences locally. At this time, a peer-to-peer mapping table (CN...

no. 3 example

[0115] Figure 8 It is the third embodiment of the present invention, specifically including the following steps:

[0116] Step 801: There is an established session between the MN and the CN, and the IP packets sent and received between the MN and the CN are forwarded through the MAG-MN (corresponding to the sMAG of the MN at this time) and the MAG-CN.

[0117] There is a bidirectional tunnel between the MAG-MN and the MAG-CN, which is used to forward the above IP message, and the data transmission path is expressed as MNsMAGMAG-CNCN.

[0118] Step 802: When the MN moves and needs to switch the currently connected MAG, the MN needs to trigger the process of changing the currently connected MAG, switching from sMAG to tMAG.

[0119] Step 803: When the MN moves to the range managed by the tMAG, the MN sends a Router Solicitation message to the tMAG.

[0120] Step 804a: tMAG finds the anchor point LMA (being LMA-MN) of MN according to the identification (being MN-ID) of MN, dis...

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Abstract

The invention relates to a mobility management method and a mobile access gateway. The method comprises the following steps: when a mobile node (MN) is switched to a target mobile access gateway (tMAG) from a source mobile access gateway (sMAG), the sMAG or tMAG transmits a first message to the mobile access gateway (MAG) of a counter node (CN) of the MN, wherein the first message carries address information directing to the tMAG; the MAG of the counter node of the MN receives the first message and updates a local buffer according to the first message. With the adoption of the mobility management method and the mobile access gateway, by transmitting the address information directing to the tMAG to the MAG of the counter node of the MN, the MAG of the counter node of the MN can successfully and timely transfer the message which is transmitted by the counter node to the MN.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a mobility management method and a mobile access gateway. Background technique [0002] Transmission Control Protocol / Internet Protocol (TCP / IP), in the initial design, did not consider the situation that the topology position of the terminal will change, that is, the TCP / IP protocol itself does not support mobility. In the traditional TCP / IP network environment, IP provides the routing function for the Internet (Internet). It assigns logical addresses, that is, IP addresses, to all nodes (including hosts and routers), 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...

Claims

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Application Information

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IPC IPC(8): H04W8/02H04W36/12H04W88/16
CPCH04W36/12H04W8/02H04W36/0011H04W88/16H04W36/0019
Inventor 骆文霍玉臻江鸿宋军沈岷
Owner 江苏盐综产业投资发展有限公司
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