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Method for transmission of data over a communications channel

A communication channel and data transmission technology, applied in the field of data transmission via communication channels, can solve problems such as high reference signal overhead, reduce memory and computing power, simplify transmitters and receivers, and save memory and computing resources.

Active Publication Date: 2013-06-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Since each layer in LTE advanced needs its own reference signal and all reference signals need to be orthogonal, more layers mean more overhead for reference signals

Method used

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  • Method for transmission of data over a communications channel
  • Method for transmission of data over a communications channel
  • Method for transmission of data over a communications channel

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Embodiment Construction

[0058] In order to improve the prior art or provide an alternative to the prior art, the present invention proposes a method for transmitting data via a communication channel of a communication system by using Hybrid Automatic Retransmission Request (HARQ for short). Such a communication system may be any system suitable for HARQ retransmission, for example, a mobile wireless communication system, a fixed wireless communication system such as a wireless link, a link between base stations, and a relay node in a wireless communication system or such as a copper wire or a wired connection such as a fiber optic connection. It may also be a single user MIMO system, where all layers are received by the same user equipment, or a multi-user MIMO system, where at least two layers are received by different user equipments. This application often involves the context of a 3GPP LTE system; it is only used as an example for illustration, and as mentioned above, the present invention is app...

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Abstract

The invention concerns a method for transmission of data over a communications channel in a communications system using Hybrid Automatic Retransmission Request (HARQ), comprising for a first transmission procedure: - encoding data as data symbols in C codewords, Ol, - mapping the data symbols of the C codewords on resource elements in a data symbol pattern in L layers, - transmitting the L layers over the communication channel, and for a subsequent HARQ retransmission procedure: - retransmitting a subset C'<C of said codewords over the communications channel using the procedure of the first transmission, wherein the procedure for HARQ retransmission is amended such that data symbols of the C codewords are mapped to a same number of resource elements used for data symbol transmission in said first transmission. The invention also concerns a mobile terminal and a radio basestation for a mobile telecommunications system.

Description

technical field [0001] The invention relates to a method of transmitting data via a communication channel. It also relates to a mobile terminal of a mobile communication system and a wireless base station of the mobile communication system. Background technique [0002] The invention relates to a method of transmitting data via a communication channel. An example of this type of communication channel is the downlink in an Orthogonal Frequency-Division Multiplexing (OFDM for short) system, where physical resources are preferably described in the frequency domain. An example of an OFDM-based system is the downlink in the R8 and subsequent versions of the 3GPP Long Term Evolution (LTE for short) standard. In this system, the smallest resource unit is a resource element (resource element, referred to as RE). A resource element with a grid of 12×7 means that a resource block (referred to as RB) has 12 REs in the frequency direction. Direction has 7 REs. Two RBs adjacent to ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L5/0044H04L5/0007H04L1/1816H04L1/1893H04L1/06H04L5/0048
Inventor 刘江华马蒂尔斯·温斯特姆
Owner HUAWEI TECH CO LTD