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Radio communication system, sink node, and radio communication method

A technology of wireless communication system and aggregation node, applied in the field of wireless communication system, can solve the problems of shortening the collection time and being unable to prevent wireless conflicts

Active Publication Date: 2015-08-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that it is impossible to prevent wireless conflicts and improve information collection efficiency to shorten the collection time of the entire system

Method used

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  • Radio communication system, sink node, and radio communication method
  • Radio communication system, sink node, and radio communication method
  • Radio communication system, sink node, and radio communication method

Examples

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Embodiment approach

[0024] figure 1 It is a diagram showing a configuration example of a wireless communication system according to the present embodiment. exist figure 1 Among them, the wireless communication system consists of sink node 1, source node 2-1a, source node 2-1b, source node 2-1c, source node 2-1d, source node 2-1e, ..., source node 2-1n, source node 2-2a, source node 2-2b, source node 2-2c, ..., source node 2-2n, source node 2-3a, ..., source node 2-3n.

[0025] figure 2 is showing figure 1 In the shown wireless communication system, each source node 2 is arranged (when it is not necessary to distinguish each source node, it may be referred to as source node 2, source node 2-1, source node 2-2, and source node 2-3 as a generic term) A plot of the distribution of groups (or regions) over the location of . exist figure 2 Among them, it is divided into 3 groups (or regions) along the radial direction with the sink node 1 as the center, and divided into 3 groups (or regions) al...

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Abstract

A radio communication system for use in a network comprising a plurality of source nodes (2), which are information transmission sources, and a sink node (1) that collects the information, the source nodes (2) and sink node (1) having radio communication functions, if any source node (2) and the sink node (1) cannot directly radio communicate with each other, these source node (2) and sink node (1) being connected to each other by use of radio multi-hop. According to the radio communication system, the sink node (1) comprises a multi-polling control unit that requests the source nodes (2) to transmit information, while the source nodes (2) each comprise a polling response control unit that transmits the information to the sink node (1) in response to the request. The multi-polling control unit in the sink node (1) divides the source nodes (2) into a plurality of groups to spatially avoid radio interferences, selects all or some of the plurality of groups as divided, and sequentially performs, for each selected group, polling for the source nodes (2) in the group, thereby simultaneously or successively performing multi-polling.

Description

technical field [0001] The present invention relates to a wireless communication system that collects information by polling. Background technique [0002] In the past, there are sensor networks, ad hoc networks, wireless mesh networks, etc. In these networks, multiple source nodes as information transmission sources and sink nodes that collect information have wireless communication functions respectively. When the node and the aggregation node cannot directly communicate wirelessly, they use wireless multi-hop to connect. In these networks, as a method of collecting information from a plurality of source nodes by a sink node in a short period of time, there are the following two methods: each source node acquires time synchronization, and the timing of sending information from each source node is staggered, Wireless conflicts are thus prevented; wireless conflicts are prevented and collection is performed in a short time by polling control that makes a sink node request t...

Claims

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Application Information

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IPC IPC(8): H04W4/04H04W40/20H04W74/06H04L45/122
CPCH04L45/122H04W40/00H04W74/06
Inventor 八木章好
Owner MITSUBISHI ELECTRIC CORP