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Method and apparatus for transmitting channel state information in multi-node system

A technology of channel state information and transmission channel, which is applied in the directions of orthogonal multiplexing system, transmission system, multiplexing communication, etc., can solve the problem of difficult to specify reference resources accurately, and achieve the effect of system performance improvement

Inactive Publication Date: 2014-02-19
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, it is difficult to precisely specify the reference resource according to the conventional definition of the reference resource

Method used

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  • Method and apparatus for transmitting channel state information in multi-node system
  • Method and apparatus for transmitting channel state information in multi-node system
  • Method and apparatus for transmitting channel state information in multi-node system

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Embodiment Construction

[0045]The following techniques can be used in such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA) and Single Carrier Frequency Division Multiple Access (SC-FDMA) used in various multiple access schemes such as CDMA may be implemented using a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented using radio technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented using wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA). IEEE802.16m is an evolution of IEEE802.16e, and it provides backward compatibility of IEEE802.16e-based systems. UTRA is part of the Universal Mobile Telecommunic...

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Abstract

The present invention provides a method and apparatus in which user equipment sends channel state information. The method includes receiving mapping information informing an uplink (UL) channel mapped to a reference signal; determining a valid downlink (DL) subframe based on the mapping information; measuring the reference signal in the valid DL subframe; and transmittingg Channel State Information (CSI), generated based on the measurement, in a configured UL subframe, wherein the UL channel is placed in the configured UL subframe, and the valid DL subframe is a DL subframe including the reference signal mapped to the UL channel.

Description

technical field [0001] The present invention relates to wireless communications, and more particularly to a method and apparatus in which a user equipment transmits channel state information in a multi-node system. Background technique [0002] Data transmission rates over wireless communication networks have recently increased rapidly. This is because various devices, such as smartphones and tablet PCs, that require machine-to-machine (M2M) communication and high data transmission rates continue to emerge and expand. In order to meet higher data transmission rates, carrier aggregation technology and cognitive wireless technology for effectively using more frequency bands, and multi-antenna technology and multi-base station cooperation technology for increasing data capacity within limited frequencies have recently been emphasized. [0003] Furthermore, wireless communication networks have a tendency to increase the density of accessible nodes in the vicinity of users. Her...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B7/26H04W24/00
CPCH04W72/082H04W24/10H04W72/541H04B7/2603H04W72/21H04W24/02
Inventor 姜智源千珍英金起台金秀南任彬哲朴成镐
Owner LG ELECTRONICS INC