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Method for transmitting control information in multiple antenna system

a control information and multiple antenna technology, applied in the field of wireless communication, can solve the problems of useless radio resources assigned to the precoding matrix index (pmi), one of the mimo information, and achieve the effect of enhancing data transmission efficiency and reducing radio resources allocated for transmitting multiple antenna information

Active Publication Date: 2012-10-25
AEGIS 11 SA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a method for efficiently transmitting control information related to multiple antennas in a wireless communication system. The method involves dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied, and transmitting the multiple antenna information through a dedicated pilot or a dedicated control channel. The method reduces the amount of radio resources allocated for transmitting the multiple antenna information, resulting in enhanced data transmission efficiency. The invention can be applied in various communication systems, such as CDMA, WCDMA, FDMA, and OFDM / OFDMA systems."

Problems solved by technology

So it may be inefficient if radio resources for the MIMO information occupies in amount of maximum number of information bits.
For example, when user data is transmitted without applying codebook-based precoding, some of radio resources assigned for a precoding matrix index (PMI) which is one of the MIMO information can be useless.

Method used

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  • Method for transmitting control information in multiple antenna system
  • Method for transmitting control information in multiple antenna system
  • Method for transmitting control information in multiple antenna system

Examples

Experimental program
Comparison scheme
Effect test

case 1

[0129]In case 1, dedicated pilots are maximally distributed in resource blocks within a range to which the same PMI is applied. If the number of dedicated pilots is larger than the number of resource blocks, one or more dedicated pilots are arranged in a resource block, and if the number of dedicated pilots is smaller than the number of resource blocks, there exist resource blocks in which no dedicated pilot is arranged. One dedicated pilot is arranged in each of four resource blocks belonging to the first PMI. Two dedicated pilots are arranged in each of two resource blocks belonging to the second PMI. One dedicated pilot is arranged in each of four resource blocks among six resource blocks belonging to the third PMI, and no dedicated pilot is arranged in the remaining two resource blocks.

[0130]In cases 2 and 3, two dedicated pilots are arranged in each of two resource blocks within a range to which the same PMI is applied. In case 2, two resource blocks respectively assigned with ...

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Abstract

A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency.

Description

TECHNICAL FIELD[0001]The present invention relates to wireless communication, and more specifically, to a method for transmitting control information related to multiple antenna in a wireless communication system.BACKGROUND ART[0002]A Multiple-Input Multiple-Output (hereinafter, referred to as MIMO) system refers to a system for improving data transmission and receive efficiency using multiple transmit antenna and multiple receive antenna. The MIMO technique includes spatial diversity and spatial multiplexing. The spatial diversity is a technique for improving transmission reliability by transmitting the same data through multiple transmit antenna. The spatial multiplexing is a technique for transmitting data in a high speed without increasing bandwidth of a system by transmitting different data through multiple transmit antenna. The spatial diversity and the spatial multiplexing may be combination.[0003]Generally, a base station provides services to a plurality of user equipments i...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L27/00
CPCH04B7/0639H04L5/0023H04L5/0051H04L27/2601H04B7/0417H04B7/12H04L5/0053H04B7/063H04B7/0634H04L25/0204H04L25/0228H01J37/32174H04B7/0413H04L1/0025H04L1/065H04L27/2627H05H1/46H04W72/20H04B7/0452H04W72/0453
Inventor KO, HYUN SOOIHM, BIN CHULCHUN, JIN YOUNGLEE, WOOK BONGLEE, MOON ILKIM, JAE WAN
Owner AEGIS 11 SA
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