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

A technology for communication devices and communication units, applied in the field of communication systems, to achieve the effect of improving throughput and avoiding drastic changes

Inactive Publication Date: 2012-04-18
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, since systems using variable-length formats such as wireless LANs have fundamentally different configurations, it is difficult to apply these related techniques

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

Examples

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Embodiment Construction

[0067] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0068] figure 1The configuration of a communication system according to an embodiment of the present invention is schematically shown. The communication system according to this embodiment is based on, for example, IEEE 802.11, and also uses the RTS / CTS handshake in the CSMA / CA control procedure.

[0069] The communication system shown in the drawing is configured with a communication station STA0 operating as an access point (AP), and a plurality of communication stations STA1, STA2, and STA3 operating as terminal stations (MT). Each of the communication stations STA1, STA2, and STA3 accommodates the communication station STA0 within each communication range, and can directly communicate with the STA0 (in other words, each of the communication stations STA1, STA2, and STA3, under the control of STA0 as an access point, constitutes BSS (Basic Se...

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Abstract

Space-division multiple access, in which a plurality of users share a radio resource on the spatial axis, is applied to perform suitable communication operations. In a case where the communication quality is high, if the frequency width is narrowed to a band of 20 MHz, then the amount of data that can be transmitted is reduced to about a half, while the frame length can be doubled. If the frame length is too long, the current modulation scheme is changed to another one having a greater number of states, thereby shortening the frame length. Conversely, in a case where the communication quality is low, the current modulation scheme is changed to another one having a smaller number of states, thereby elongating the frame length. If the frame length is still too short, the current frequency width is changed to a narrower frequency width, thereby further elongating the frame length.

Description

technical field [0001] The present invention relates to a communication device and a communication method, a computer program, and a communication system to which Space Division Multiple Access (SDMA) is applied, in which a plurality of users share radio resources on a spatial axis. In particular, the present invention relates to a communication device and a communication method, a computer program, and a communication system for multiplexing and transmitting frames having a variable-length frame format to a plurality of users. Background technique [0002] Wireless communication has increased the burden of wiring in conventional wired communication, and furthermore, has contributed to its use as a technique for realizing communication in mobile objects. As a standard related to wireless LAN (Local Area Network), for example, IEEE (Institute of Electrical and Electronics Engineers) 802.11 can be exemplified. IEEE802.11a / g has been widely distributed. [0003] According to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/18H04B7/10H04J11/00H04J99/00H04W16/28H04W84/12
CPCH04W72/046H04B7/0452H04B7/0697H04B7/0617H04L27/2602H04L1/0003H04L1/0007H04L5/0023H04L5/0064H04L1/1854
Inventor 高野裕昭迫田和之
Owner SONY GRP CORP
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