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Communication Apparatus And Communication Method

A communication device and communication system technology, applied in wireless communication, digital transmission system, data exchange network, etc., can solve problems such as wireless signal interference, and achieve the effect of reducing the impact

Active Publication Date: 2015-03-18
키오시아가부시키가이샤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When multiple communication devices perform wireless communication, interference of wireless signals becomes a problem because the devices are in close proximity to each other

Method used

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  • Communication Apparatus And Communication Method
  • Communication Apparatus And Communication Method
  • Communication Apparatus And Communication Method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0022] figure 1 is a block diagram illustrating a structural example of the communication device 1 according to the first embodiment. This communication device 1 includes a network control unit 2 , a multicast group storage unit (identification information storage unit) 3 , a wireless interface 4 , a nonvolatile memory 5 , and a transmission control unit 6 .

[0023] The communication device 1 according to the first embodiment can transmit and receive data with another communication device 1 having the same structure through P2P communication. The communication device 1 can also perform unicast communication with another communication device 1, and can transmit the same data to a plurality of other communication devices 1 by multicast.

[0024] The wireless interface 4 performs a reception process of a wireless signal, and when the received signal is a message for the interface itself, this wireless interface 4 outputs the message to the network control unit 2 . Also, the wi...

no. 2 example

[0076] Next, the communication device 1 according to the second embodiment is explained. The configuration of this communication device 1 according to the second embodiment is the same as that of the communication device 1 of the first embodiment. Components different from the first embodiment are explained below.

[0077] In the first embodiment, as transmission control, an example in which transmission power control and transmission speed control are performed has been explained. In the second embodiment, as transmission control, an example in which control to change the frequency is performed is explained. When a plurality of communication devices 1 perform transmission using the same frequency band, there is a possibility that interference of radio waves occurs. In particular, when the communication devices 1 are mobile terminals, these devices can move, so that there is a possibility that the state of the reachable area of ​​radio waves changes with time. Therefore, in...

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Abstract

According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims the benefit of priority from prior Japanese Patent Application No. 2013-187598 filed on September 10, 2013, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments described herein relate generally to communication devices and communication methods. Background technique [0004] As a communication method in wireless communication, there is a peer-to-peer (P2P) communication method in which data is directly transmitted and received between terminals without passing through any access point such as the Internet or an intranet. Since any communication infrastructure is not necessary for P2P communication, the method can be used in any location, and communication channels can be minimized, resulting in reduction of communication latency. Also, using a communication signal with a small output enables communication with small power consu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W52/34
CPCH04W52/243H04L12/189H04W52/38H04W52/48
Inventor 前田贤一宫本新石山政浩中井弘人
Owner 키오시아가부시키가이샤