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Method and arrangement in a telecommunication system

一种通信系统、设备的技术，应用在改进的多HARQ传输领域，能够解决不同等问题

Inactive Publication Date: 2009-04-15
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is disadvantageous because usually different types of radio packets have different priorities for transmission on the shared transport channel
Furthermore, the first transmission and each retransmission attempt in HARQ may experience different channel quality

Method used

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  • Method and arrangement in a telecommunication system
  • Method and arrangement in a telecommunication system
  • Method and arrangement in a telecommunication system

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Embodiment Construction

[0014] The invention relates to the support of an antenna (or stream) selection mechanism, especially suitable for multi-antenna systems, i.e. at least a plurality of antennas 13 are provided at the site of a transmitter unit 11 suitable for a multi-stream transmission 14 in which , the resource allocation (in terms of frequency resources, time resources, or code resources) and the order of antenna selection at the sites of the transmitter unit 11 for retransmitting data packets is based on data obtained from data received at the sites of the receiver unit 12 A quality measure of the packet, and possibly based on other criteria (such as priority) indicating the significance of the received data packet. The metric provides an information measure indicating the probability that a certain data packet can be decoded having been received once or possibly after one or more retransmissions. A device 15 located at or attached to the receiver unit 12 is adapted to obtain said measure a...

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Abstract

The present invention relates to methods and arrangements in a multi-antenna radio communication system, in particular to methods and arrangements for improved multiple HARQ transmission in such systems. While HARQ transmission schemes, as known in the art, only can consider the fact whether or not a transmission attempt has been successful the present invention provides a HARQ retransmission scheme that considers the reception quality for already performed transmissions of a same data packet when selecting a resource allocation for necessary re-transmissions. Resource allocation for retransmissions is based on a pre-defined metric indicating a quality of the reception of the previous transmission attempts. Such a metric can be derived from a quality measure derived in the receiver unit, e.g. a CQI or CSI-based value, or an appropriate measure of the mutual information, e.g. the accumulated conditional mutual information (ACMI) .

Description

technical field [0001] The present invention relates to methods and arrangements in multi-antenna radio communication systems, and in particular to methods and arrangements for improved multiple HARQ transmissions in such systems. Background technique [0002] In recent years, much research has been done on delivering high data rates over wireless channels using multiple transmit and receive antennas (MIMO). Different multi-antenna approaches exploit different properties of the radio channel in order to support one or more of array gain, diversity gain and spatial multiplexing gain. For example, spatial multiplexing can increase the peak data rate and spectral efficiency of multi-antenna systems. Several known transmitter and receiver architectures have been proposed to obtain appreciable multiplexing gains. An example is Vertical Bell Laboratories Space-Time Architecture (V-BLAST). Furthermore, a horizontal MIMO structure called per-antenna rate control (PARC), in which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04B7/06H04L1/16H04L1/1812H04L1/1825
CPCH04L1/0025H04L1/1812H04L1/1825H04B7/061H04L1/1854H04L1/06H04L1/1893H04B7/0417H04L1/1671H04L1/0026
Inventor P·斯基勒马克万蕾廖敬一
Owner TELEFON AB LM ERICSSON (PUBL)
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