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Wireless communication apparatus, wireless communication method, and wireless communication system

A technology of a wireless communication device and a wireless communication system, which is applied in the field of wireless communication systems and can solve problems such as item update and failure to be saved

Active Publication Date: 2015-01-14
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, with the above technique, when an entry needs to be updated, since an upper limit is set on the number of entries in the routing table, frequently used paths may sometimes not be able to be saved due to entry updates
Therefore, in some cases, communication interruption may occur

Method used

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  • Wireless communication apparatus, wireless communication method, and wireless communication system
  • Wireless communication apparatus, wireless communication method, and wireless communication system
  • Wireless communication apparatus, wireless communication method, and wireless communication system

Examples

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no. 1 example

[0028] overall configuration

[0029] figure 1 is a schematic diagram illustrating an example of the overall configuration of the wireless communication system according to the first embodiment. Such as figure 1 As shown, the wireless communication system is a system including nodes, ie, nodes A to H, a gateway (GW) device 1 , and a GW device 2 .

[0030] For example, a management server that collects data from each of the nodes is connected to GW device 1 and GW device 2 . Each of the nodes is a wireless terminal that acquires data from a meter used to read, for example, a value of electric power used in a home, and transmits the data to a management server connected to one of the GW devices. Furthermore, in order to use less memory, an upper limit to the number of entries that can be registered in the routing table is set in each of the nodes.

[0031] Each of the nodes in the wireless communication system learns path information by using an aggressive routing protocol. ...

no. 2 example

[0140] In the above description, a description has been given of the embodiments according to the present invention; however, the embodiments are not limited thereto but can be implemented with various embodiments other than the above-described embodiments. Therefore, another embodiment will be described below.

[0141] wireless network quality

[0142] "Quality" stored in the routing table entry is a value indicating the quality of the path from its own node to the destination node. For example, a value such as received electric field strength may also be used for "quality". Furthermore, reachability, eg the ratio of the number of frames whose responses can be checked to the total number of frames that have been sent to destination A, can also be used.

[0143] usage frequency

[0144] In the above-mentioned embodiments, the description has been given of an example in which the "path timer" which is reset when a path is used and which is reset from the The elapsed time is...

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Abstract

A wireless communication apparatus stores therein, in an associated manner, each piece of path information on a plurality of destinations and a use frequency of data communication that is performed by using the path information. When the wireless communication apparatus receives data whose send source is a first destination, the wireless communication apparatus specifies, on the basis of the use frequency, path information that is less frequently used from among the pieces of the stored path information. The wireless communication apparatus updates the specified path information to path information whose destination is the first destination.

Description

technical field [0001] The embodiments discussed herein relate to a wireless communication device, a wireless communication method, a wireless communication program, and a wireless communication system. Background technique [0002] There is a conventionally known wireless communication system that collects data from wireless terminals by using a wireless ad hoc network. For example, a system for collecting meter reading data is used by setting a wireless terminal in a meter reading meter that reads electric power used at home. [0003] Since such a wireless terminal is generally set in a fixed manner, the wireless terminal learns path information by using an aggressive routing protocol. Specifically, by periodically sending and receiving control messages between adjacent terminals connected by a single hop, the wireless terminal measures the path quality between nodes, and assigns the path quality to the final destination in descending order of the path quality Multiple r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W84/18H04W88/02H04W4/70
CPCH04L41/12H04W84/18H04W4/005H04W4/70H04W40/24
Inventor 稻生裕一曾根田达也川床诚高冈秀文山田健二
Owner FUJITSU LTD