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Multi-hop communication terminal, multi-hop communication system, and multi-hop communication method

A multi-hop communication and terminal technology, applied in wireless communication, sustainable communication technology, advanced technology, etc., can solve the problems of communication quality deterioration and unsuppressed signal interference.

Inactive Publication Date: 2014-05-28
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a gateway causing interference to other terminals only reduces its transmission power to such an extent that the communication quality between the gateway and a terminal directly communicating with itself is not deteriorated
As a result, interference between signals sent from individual gateways is not suppressed

Method used

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  • Multi-hop communication terminal, multi-hop communication system, and multi-hop communication method
  • Multi-hop communication terminal, multi-hop communication system, and multi-hop communication method
  • Multi-hop communication terminal, multi-hop communication system, and multi-hop communication method

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no. 1 approach

[0025] Overview of multi-hop communication systems

[0026] figure 1 is a schematic diagram showing an example of the multi-hop communication system according to the first embodiment of the present invention. figure 1 A wireless multi-hop network 1 and a wired network 2 are shown. The wireless multi-hop network 1 includes a plurality of nodes. These nodes include multiple gateways (GW) 10 and multiple multi-hop communication terminals 50 . Wireless multi-hop network 1 and wired network 2 are connected via GW10. A multi-hop communication system may hereinafter be referred to as a communication system for short. A multi-hop communication terminal may also be referred to simply as a terminal.

[0027] The wired network 2 is an IP network that performs data communication based on Internet Protocol (IP) or the like, and includes a management server 5 connected to the GW10 . The management server 5 is a server device that collects data detected in the wireless multi-hop networ...

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Abstract

The present invention relates to a multi-hop communication terminal, a multi-hop communication system, and a multi-hop communication method. In a gateway (GW), when interference is detected by an interference detection unit, a frame generation unit sends an interference broadcast signal. A terminal receives the interference broadcast signal sent at a maximum transmission power from the GW to which the terminal belongs. The interference broadcast signal includes information on a planned transmission power value that is a transmission power value of a data signal in the GW and is smaller than the maximum transmission power value. The interference broadcast signal is sent at the maximum transmission power value.

Description

technical field [0001] Embodiments discussed herein relate to a multi-hop communication terminal, a multi-hop communication system, and a multi-hop communication method. Background technique [0002] In recent years, sensor networks have been increasingly used to monitor various types of information used to manage living environments, nature conservation, medical care, traffic conditions, etc. In a sensor network, sensors with a communication function (hereinafter may be referred to as “sensor terminals”) are installed at various locations, and the sensor terminals automatically constitute a network. Each sensor terminal performs wireless communication with the surrounding sensor terminals using the random access method. A carrier sense multiple access / collision avoidance (CSMA / CA) method is an example method of random access communication. Each sensor terminal identifies a terminal (ie, a relay terminal) to which data is to be transmitted among surrounding sensor terminal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/02H04W52/04H04W88/02
CPCH04W40/22H04W40/08Y02D30/70
Inventor 藤田裕志尾崎一幸温允
Owner FUJITSU LTD
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