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Method for transmitting ACK/NACK by using multiple antennae

An antenna and transmitting equipment technology, applied in the directions of diversity/multi-antenna system, multi-frequency code system, space transmit diversity, etc., to achieve the effect of low requirements

Inactive Publication Date: 2010-03-31
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order not to destroy the single-carrier characteristics of the uplink signal, the FDM or CDM multiplexing method cannot be used to send signals in the uplink direction at the same time, which leads to multiplexing between many pairs of uplink control channels, or between uplink data channels and uplink control channels. time limit

Method used

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  • Method for transmitting ACK/NACK by using multiple antennae
  • Method for transmitting ACK/NACK by using multiple antennae
  • Method for transmitting ACK/NACK by using multiple antennae

Examples

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Embodiment 1

[0036] Assume that only the ACK / NACK information of data in one downlink subframe is transmitted in one uplink subframe, and assume that when MIMO is used for data transmission, the maximum number of codewords sent simultaneously in one subframe is P, for example, P equals 4. Each codeword generates 1-bit ACK / NACK information, so that at most P bits of ACK / NACK information need to be sent simultaneously in the uplink direction. Assuming that the number of CCEs contained in the PDCCH for scheduling downlink data transmission is greater than or equal to 2, then according to the mapping relationship between CCEs and ACK / NACK channels, the user equipment can have at least two available ACK / NACK channels, for example, they are the PDCCH with the smallest index The ACK / NACK channels mapped by the two CCEs. It is further assumed that the user equipment is configured with two power amplifiers and antennas. And it is assumed that the number of physical bits provided by each ACK / NACK c...

Embodiment 2

[0040] Assuming that the ACK / NACK information of the data of multiple downlink subframes is transmitted in one uplink subframe, and the base station sends data for the user equipment in P (greater than or equal to 2) downlink subframes, the ACK / NACK information of each subframe The information is combined to obtain one ACK / NACK bit, and a total of P ACK / NACK information bits are obtained. Each subframe obtains one ACK / NACK channel, so there are P ACK / NACK channels in total, and two of them are selected for transmitting ACK / ACK information. It is further assumed that the user equipment is configured with two power amplifiers and antennas. And it is assumed that the number of physical bits provided by each ACK / NACK channel is 4.

[0041] The user equipment receives data and generates P ACK / NACK bits. Then, the user equipment jointly encodes the P ACK / NACK bits to obtain 8 coded bits. Then, the 8 coded bits are equally divided into 2 blocks, and each block contains 4 bits; then...

Embodiment 3

[0044] It is assumed that the downlink frequency of the system is composed of multiple frequency bands, and PDCCH is sent in each downlink subframe on each frequency band to schedule downlink data transmission, and remember that the base station transmits for the user equipment in P (greater than or equal to 2) frequency bands If data is received, the ACK / NACK information of each frequency band is combined to obtain one ACK / NACK bit, and a total of P ACK / NACK information bits are obtained. Each frequency band obtains one ACK / NACK channel, so there are P ACK / NACK channels in total, and two of them are selected for transmitting ACK / ACK information. It is further assumed that the user equipment is configured with two power amplifiers and antennas. And it is assumed that the number of physical bits provided by each ACK / NACK channel is 4.

[0045] The user equipment receives data and generates P ACK / NACK bits. Then, the user equipment jointly encodes the P ACK / NACK bits to obtain ...

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Abstract

A method for transmitting ACK / NACK by using multiple antennae comprises the steps of: transmitting ACK / NACK messages of P bits by a transmitting device, distributing N ACK / NACK channels, providing M antennae, wherein N is larger than or equal to M; after carrying out combined coding on the P ACK / NACK bits, mapping the output coding bits to M ACK / NACK channels; and transmitting M ACK / NACK channelson different antennae. With the inventive method adopted, multiple antennae simultaneously transmit ACK / NACK messages of one or multiple bits, so as to obtain space diversity gain; and signals transmitted on each antenna are kept with single carrier characteristic, thus the requirement of the power amplifier of the transmitting device is lower.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically relates to a device and method for multi-antenna transmission of ACK / NACK information in the wireless communication system. Background technique [0002] The next-generation wireless communication standard LTE of the 3GPP standardization organization, its downlink transmission technology is based on Orthogonal Frequency Division Multiplexing (OFDM); its uplink transmission technology is based on Single Carrier Frequency Division Multiple Access (SCFDMA). The LTE system includes two types of frame structures, frame structure type 1 adopts frequency division duplex (FDD), and frame structure type 2 adopts time division duplex (TDD). [0003] image 3 It is the frame structure of the LTE FDD system, and the time length of the radio frame is 307200×T s =10ms, each wireless frame is divided into 20 lengths of 15360T s = 0.5ms time slot, the index range of the time slot...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08H04L27/26
Inventor 李迎阳李小强
Owner SAMSUNG ELECTRONICS CO LTD
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