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A method and system for frequency domain scheduling in time division duplex multiplexing system

一种频域调度、时分双工的技术，应用在通信领域，能够解决预编码矩阵不能进行频域调度等问题，达到解决矛盾的效果

Active Publication Date: 2008-02-20
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0008] The present invention provides a method and system for implementing frequency-domain scheduling in a time-division duplex multiplexing system, which is used to solve the problem that frequency-domain scheduling cannot be performed when channel detection is used to obtain a precoding matrix in the prior art

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  • A method and system for frequency domain scheduling in time division duplex multiplexing system
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  • A method and system for frequency domain scheduling in time division duplex multiplexing system

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Embodiment Construction

[0057] In order to solve the problem that the frequency domain scheduling cannot be performed when the precoding matrix is ​​obtained by channel sounding in the prior art, in this embodiment, the user terminal is used to send the unprecoded uplink reference symbol to the base station, and the base station obtains the channel impulse response according to the reference symbol Matrix and calculate the linear spatial domain precoding matrix corresponding to each downlink physical resource block, and then obtain the channel quality indication of the downlink physical resource block according to the channel impulse response matrix and the linear spatial domain precoding matrix to perform frequency domain scheduling.

[0058] In the current 3GPP EUTRA system, downlink transmission based on OFDM modulation technology adopts OFDMA multiple access mode, and uplink transmission adopts SC-FDMA multiple access mode. The OFDMA system refers to an OFDM system that can distinguish users in th...

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Abstract

The utility model discloses a method and system of realizing frequency domain scheduling in the time division duplex system which comprises the following: a first equipment sends a non pre-coded reference mark to a second equipment; according to the reference mark, the second equipment obtains the impact response matrix of the signal channel by which the first equipment sends the reference mark, moreover a linear empty domain pre-coding matrix of candidate physical source block sending data to the first equipment is obtained according to the impact response matrix; the second equipment obtains the signal channel quality indication of candidate physical source block according to the impact response matrix and the linear hollow domain pre-coding matrix; frequency domain scheduling is performed according to the signal channel quality indication. The utility model has the advantages that the problem that the frequency domain scheduling can not be performed when using signal channel detection method in the prior art is solved as well as the confliction adopting the frequency domain scheduling and the linear empty domain pre-coding is also solved.

Description

technical field [0001] The present invention relates to Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology in the communication field, in particular to a method and system for realizing frequency domain scheduling in a time division duplexing multiplexing system. Background technique [0002] In an OFDM-based time division duplex (TDD, Time division duplex) communication system, frequency domain scheduling can be used to improve system communication performance. Frequency domain scheduling refers to a method of selecting a suitable sub-frequency band for transmitting data for user terminals, thereby making full use of frequency selectivity in broadband communication systems. [0003] Referring to Figure 1, it is a schematic diagram of the relative power of subcarriers received by different user terminals. The relative power obtained by comparing each subcarrier received by different user terminals with the same reference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B7/14H04J11/00H04J1/00H04J99/00
CPCH04L2025/03426H04L27/261H04L5/006H04L25/03343H04L5/0023H04L5/1484H04L2025/03414H04J1/00H04L27/26
Inventor 索士强王映民熊琴玲
Owner DATANG MOBILE COMM EQUIP CO LTD
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