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

A communication system and communication unit technology, applied in the field of space division multiple access, capable of solving problems such as inter-network interference and unassumed space division multiple access

Inactive Publication Date: 2012-04-11
SONY GRP CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0038] Also, neither of the systems disclosed in PTL 2 and 3 assumes space-division multiple access
In a space division multiple access system, the problem of inter-network interference appears significantly compared to the case where the CSMA / CA system protocol is executed by a general wireless LAN system

Method used

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

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Embodiment Construction

[0123] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0124] With a space division multiple access system, multiple user signals received contemporaneously can be spatially separated by performing signal processing that multiplies outgoing / incoming signals of multiple antennas by a wait value. It is also possible to distribute multiple signals concurrently to multiple users by multiplying the signal by a similar wait value and then transmitting.

[0125] figure 1 An exemplary structure of a communication device realizing space division multiple access is shown. The communication device shown is equipped with a plurality of transmit antennas 11-0, 11-1, etc. In the physical layer processor 12, the input / output signals of the respective antennas 11-0, 11-1, etc. are multiplied by wait values ​​W0 to W3, respectively. In doing so, the signal processor 12 is able to manipulate a single independent st...

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PUM

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Abstract

Space division multiple access is suitably implemented while avoiding network-to-network interference. A communication station which exchanges time use information by transmission / reception sequence units between different networks or devices to which the communication station is not adjacent, and starts the transmission / reception sequence units on the basis of the information assigns the start time of the transmission / reception sequence units of the communication station to time zones which are not used by the adjacent networks or the adjacent devices. In consequence, even if the exclusive assignment of frequency channels is difficult, time division enables a plurality of radio networks or radio communication devices to use the channels, thereby implementing the efficient space division multiple access.

Description

technical field [0001] The present invention relates to a communication system, a communication device, a communication method and a computer program using space division multiple access (SDMA) in which multiple users share wireless resources on a space axis. More particularly, the present invention relates to a communication system, a communication device, a communication method, and a computer program that realize space division multiple access while avoiding interference between networks. Background technique [0002] Wireless communication eliminates the wiring work burden of conventional wired communication, and additionally satisfies use as a technology for realizing mobile communication. For example, IEEE (Institute of Electrical and Electronics Engineers) 802.11 can be cited as an established standard regarding wireless LAN (Local Area Network). IEEE 802.11a / g has been widely used. [0003] For many wireless LAN systems such as IEEE 802.11, an access control protoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/04H04J99/00H04W16/28H04W84/12H04W88/02
CPCH04W72/046H04B7/0697
Inventor 迫田和之森冈裕一
Owner SONY GRP CORP
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