Diversity control method

A control method and directional technology, applied in the directions of space transmit diversity, diversity/multi-antenna system, radio transmission system, etc., can solve the problem of narrowing the range and achieve the effect of reducing quality deterioration

Inactive Publication Date: 2009-03-11
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it enables a radio system to have interference immunity to another radio system and to narrow the range in which the radio system affects other radio systems

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Embodiment Construction

[0026] Next, embodiments of the present invention will be described with reference to the drawings. The diversity control method according to the embodiment of the present invention can be applied to a free position visual audio system (with a place moving function), which is called "location free" (registered trademark of Sony Corporation), for example, by which users can watch and listen to Content (for example, television broadcasts). A place-moving visual audio system consists of at least one base station as a content delivery device and a content receiving device (also known as a location-free player or client) that provides video and audio data to users viewing and listening to the content .

[0027] First, refer to figure 2 , briefly explaining the structure of a content transmission and reception system using a wireless LAN. A television antenna 2 is connected to a base station 1 as a content delivery device, so that the base station 1 can receive television broadca...

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Abstract

A diversity control method of selecting a plurality of antennas having directivities and disposed in different directions is disclosed. At least two antennas are selected from the plurality of antennas. First diversity control of comparing strengths of reception powers of the selected at least two antennas is performed. One antenna having a stronger reception power than others is selected. If the radio conditions of at least two antennas have deteriorated in the first diversity control, second diversity control of comparing radio conditions of at least two antennas is performed in a predetermined period and at least one of the antennas is changed to another new antenna based on a compared result.

Description

[0001] Cross References to Related Applications [0002] The present application contains subject matter related to Japanese Patent Application Serial No. 2007-228979 filed in the Japan Patent Office on Sep. 4, 2007, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to diversity control methods eg used by wireless devices eg having multiple directional antennas. Background technique [0004] In a radio system such as a wireless local area network (LAN), a diversity control method of switching one of a plurality of antennas to another has been used for better quality communication. Diversity control can suppress the deterioration of transmission quality, such as overcoming multipath fading. Furthermore, it enables a radio system to have interference immunity against another radio system and narrows the range in which the radio system affects other radio systems. For example, the following Japanese Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/06H04B7/08
CPCH04B7/0814H04B7/0874
Inventor 松原弘幸
Owner SONY CORP
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