Communication apparatus, communication method, computer program, and communication system

一种通信设备、波束图案的技术，应用在传输系统、无线通信、多路复用通信等方向，能够解决接入控制困难、通信困难、无法接收信号等问题，达到改善通信质量、抑制发送开销、改进接收SINR的效果

Inactive Publication Date: 2012-03-14
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if it is difficult to perform communication with a specific communication station unless a beam pattern is formed, it becomes difficult to perform access control based on physical carrier detection because if a beam pattern is formed, reception from unidentified the signal of the station

Method used

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  • Communication apparatus, communication method, computer program, and communication system
  • Communication apparatus, communication method, computer program, and communication system
  • Communication apparatus, communication method, computer program, and communication system

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Embodiment Construction

[0091] Now, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that although the VHT (Very High Throughput) standard using the millimeter wave band of the 60 GHz band can be simplified as a communication format for performing beam pattern control, the essence of the present invention is not limited to a specific frequency band. Furthermore, in order to obtain the desired properties of antenna directivity, it is necessary to control the amplitude and phase distribution of the antenna. The antenna array is configured by arraying multiple half-wave dipole antennas and slot antennas, and controlling the excitation amplitude and phase of each antenna element allows directivity to be controlled in a finer manner, and the direction of the beam can be temporarily changed. Although performing beam pattern steering of antennas is necessary to implement the present invention, the essence of the present invention is not limit...

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Abstract

A communication apparatus which appropriately controls beam patterns while performing access control based on physical carrier sensing. The communication apparatus, in conditions when signals cannot reach the other party without beam pattern forming, transmits a frame having a long preamble and enables access control based on physical carrier sensing. In conditions when signals can sufficiently reach the other party even without beam pattern forming, the communication apparatus transmits a frame having a shorter preamble and keeps the transmission overhead low. Further, the communication apparatus determines the beam pattern and the preamble type based on the transmission-reception history of access control following the CSMA / CA method.

Description

technical field [0001] The present invention relates to a communication device, a communication method, a computer program, and a communication system for performing beam pattern control using an array antenna; more particularly, to a communication device, a communication method, a computer program, and a communication system that use a physical-based Access control and beam pattern control with carrier sense. Background technique [0002] Wireless communication is rapidly coming into daily use as a technology that can solve the burden of wiring work of conventional cable communication, and further, mobile communication can be realized. Examples of typical standards related to wireless LAN (Local Area Network) include IEEE (Institute of Electrical and Electronics Engineers) 802.11 and 802.15. [0003] Many wireless LAN systems use an access control procedure based on carrier detection such as CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance: Carrier Sense Mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04B7/10H04J99/00H04W88/02H04W92/18
CPCH04B7/0617H01Q3/26H01Q9/16H01Q13/10H01Q21/06H04B7/0408H04W72/046H04W74/0808
Inventor 迫田和之森冈裕一泽井亮高野裕昭木村亮太国弘卓志
Owner SONY GRP CORP
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