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Method of transmitting control information in wireless communication system

A wireless communication system and technology for control information, applied in the field of transmitting downlink control information

Active Publication Date: 2011-08-24
BLACKBERRY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An acknowledgment message is transmitted for the PMI transmitted by the UE, however, the acknowledgment message is unnecessary information when MU-MIMO is used

Method used

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  • Method of transmitting control information in wireless communication system
  • Method of transmitting control information in wireless communication system
  • Method of transmitting control information in wireless communication system

Examples

Experimental program
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Embodiment Construction

[0025] figure 1 Shows the structure of a wireless communication system. The wireless communication system may have a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS). E-UMTS may also be referred to as a Long Term Evolution (LTE) system. The wireless communication system can be widely adopted to provide various communication services such as voice, packet data, and the like.

[0026] refer to figure 1 , the Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) includes at least one base station (BS) 20, which provides a control plane and a user plane.

[0027] User Equipment (UE) 10 may be fixed or mobile, and may be referred to by other terms, such as Mobile Station (MS), User Terminal (UT), Subscriber Station (SS), wireless device, and the like. BS 20 is typically a fixed station that communicates with UE 10 and may be referred to by other terms such as evolved Node B (eNB), base transceiver system (BTS), access point, and so forth. W...

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PUM

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Abstract

A method of transmitting control information in a wireless communication system is provided. The method includes configuring downlink control information including a plurality of information fields according to a format of scheduling for transmission of a single codeword in a spatial multiplexing mode, wherein the plurality of information fields include a precoding matrix indicator (PMI) confirmation filed for indicating whether precoding is performed on downlink data by using a PMI reported by a user equipment and a transmitted precoding matrix indicator (TPMI) information field for indicating a codebook index, and at least one of the PMI confirmation field and the TPMI information field indicates an offset value of power for the downlink data transmission or interference information for the downlink data transmission, and transmitting the downlink control information.

Description

technical field [0001] The present invention relates to wireless communications, and more particularly, to methods of communicating downlink control information. Background technique [0002] Recently, in order to maximize the performance and communication capabilities of wireless communication systems, attention has been paid to multiple-input multiple-output (MIMO) systems. Developed from a conventional method using a single transmit (Tx) antenna and a single receive (Rx) antenna, the MIMO technology uses multiple Tx antennas and multiple Rx antennas to improve transmission efficiency of data to be transmitted or received. A MIMO system is also called a multiple antenna system. In MIMO technology, instead of receiving one complete message via a single antenna path, data segments are received via multiple antennas and then collected as a piece of data. Therefore, the data transfer rate can be improved within a certain range, or the system range can be increased with respe...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/26
CPCH04B7/0639H04B7/005H04L25/03898H04W72/12H04W72/23H04B7/0452
Inventor 高贤秀具滋昊郑载薰李文一
Owner BLACKBERRY LTD
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