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Node inquiring method, node, and mobile communication system

A mobile communication system and node technology, applied in transmission systems, digital transmission systems, wireless communication services, etc., can solve problems such as mobile processing node congestion

Inactive Publication Date: 2006-12-27
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, mobile processing nodes are congested

Method used

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  • Node inquiring method, node, and mobile communication system
  • Node inquiring method, node, and mobile communication system
  • Node inquiring method, node, and mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 〔Mobile communication system〕

[0048] (General configuration of mobile communication system)

[0049] The mobile communication system uses a mobility control scheme called HMIP (Hierarchical Mobile IPv6). HMIP is obtained by extending Mobile IPv6. HMIP is a mobility control scheme for transferring packets sent to the home address of a mobile node (hereinafter referred to as MN) through nodes called a home agent (hereinafter referred to as HA) and a mobility anchor point (hereinafter referred to as MAP). to the MN.

[0050] Such as figure 1 As shown, the mobile communication system includes several nodes, such as MAP(a)1a to MAP(n)1n, MN(a)2a and MN(b)2b. Several nodes MAP(a)1a to MAP(n)1n form a group. Each of MAP(a)1a to MAP(n)1n grasps a MAP located near itself (hereinafter referred to as an adjacent MAP) by looking up another MAP. MAP(a)1a to MAP(n)1n accept registrations of home addresses and care-of addresses from MN(a)2a and MN(b)2b. Further, MAP(a)1a to M...

Embodiment 2

[0230] 〔Mobile communication system〕

[0231] (General configuration of mobile communication system)

[0232] The mobile communication system uses HMIP and includes several MAPs and several MNs. In the embodiment of the present invention, the judging criterion "a smaller number of hops between nodes indicates a shorter distance" is used as a judging criterion for judging whether the distance between nodes is short. For far / near judgment information, the number of hops between nodes is used.

[0233] (configuration of MAP)

[0234] Except for the MAP lookup process performed by the NMDP unit 15, and the adjacent MAP table and the second table of the MAP are different, the MAP is actually the same as figure 2 The same is shown for MAP1. by putting Figure 20 The adjacent MAP table 116k and the second table 117k of the MAP in the embodiment of the present invention are shown as examples, and the adjacent MAP table and the second table of the MAP in the embodiment of the pre...

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PUM

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Abstract

Node search method, node, mobile communication system, and computer program product. A node search method for searching for a service node for providing a service to a mobile node, in a mobile communication system including service nodes and the mobile node, each of the service nodes and the mobile node having a node storage unit configured to store addresses of service nodes. The node search method comprises transmitting a node search packet for searching for the service node from a search node to an address stored in the node storage unit of the search node, returning a node notice packet from at least one of a search packet reception node and a peripheral node, to the search node in response to the node search packet, detecting the service node on a basis of a returned node notice packet, and updating the node storage unit of the search node on a basis of a detected service node.

Description

technical field [0001] The invention relates to a node query method, a node and a mobile communication system. Background technique [0002] As a conventional method of finding the nearest position node from a group formed of several nodes by means of a special node, there is a method using anycast addresses. The anycast address is an address that makes it possible to select a node at the nearest location from among several nodes and access the node. Anycast addresses have been proposed in Internet Protocol Version 6 (IPv6). [0003] On the other hand, in an Internet Protocol (IP) network, there is a mobile processing node that implements control to deliver packets to a mobile node even if the mobile node migrates. For example, a mobile processing node handles the delivery and buffering of packets destined for the mobile node. Therefore, the mobile node needs to search for a mobile processing node existing nearby. Thus, among the access routers to which the mobile node i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04Q3/00H04L29/06G06F9/44H04L12/70H04L12/28H04W4/00H04W8/22H04W8/26H04W40/00H04W40/24H04W48/16H04W80/04H04W84/12
CPCH04W40/00H04L47/10H04W48/16H04W8/26H04W4/00H04L12/28
Inventor 大前浩司井上雅広冈岛一郎梅田成视
Owner NTT DOCOMO INC
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