Frequency domain dispatching method and device
A technology of frequency domain scheduling and frequency domain resources, applied in the field of communication, to achieve the effect of simplifying the frequency domain scheduling process
Active Publication Date: 2011-08-03
SHANGHAI ULTIMATE POWER COMM TECH
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Problems solved by technology
However, for the TDD mode, since the uplink and downlink use the same frequency band for data transmission, how to use the symmetry of the uplink and downlink channels of the TDD communication system to flexibly realize the frequency domain scheduling of the TDD communication system and simplify the frequency domain of the TDD communication system Scheduling process is the current urgent problem
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[0052] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0053] The basic idea of the present invention is: using the symmetry of the uplink and downlink channels of the TDD communication system, when the base station obtains the channel quality indicators of the downlink direction and the uplink direction at the same time, the base station selects one of the frequency domains with high reliability for the downlink and uplink directions. scheduling.
[0054] As mentioned above, the so-called frequency domain scheduling refers to the system deciding which users to select for communication and determining the frequency domain resources used by these users within a given time period. The frequency domain resource refers to a set of subcarriers, and the frequency domain resource location ...
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The invention discloses a dispatching method and device in time-division duplex communication system. The method comprises the following steps: acquiring a channel quality indication at the descending direction and the ascension direction; selecting the highly reliable channel quality indication in order to dispatch the frequency domain for the users at the descending direction and the ascension direction. The frequency domain dispatching device comprises the following parts: a channel quality acquiring unit for acquiring the channel quality indication at the descending direction and the ascension direction and writing the acquired channel quality indication to the channel quality saving unit, a channel quality saving unit for recording the acquired channel quality indication and acquiring the channel quality indication time of day and the measuring direction; a frequency domain dispatching unit for selecting highly reliable channel quality indication in the channel quality indicationsaving unit in order to dispatch the frequency domain for the users at the descending direction and the ascension direction. The invention achieves the frequency domain dispatching of TDD communication system, which simplifies the frequency domain dispatching process of TDD communication system.
Description
technical field [0001] The present invention relates to the communication field, in particular to a frequency domain scheduling method and device for a Time Division Duplex (TDD, Time DivisionDuplex) communication system. Background technique [0002] In the TDD communication system based on OFDM technology, frequency domain scheduling has been considered as an effective method to improve the performance of the communication system. The so-called frequency domain scheduling refers to the system deciding which users to select for communication and frequency domain resources used by these users within a given time period. [0003] Whether a user is scheduled is determined by many factors, such as: service quality parameters, load for scheduling in the buffer, pending retransmissions, channel quality measurements, terminal capabilities, terminal sleep cycles and measurement periods, system parameters etc. Among them, the channel quality measurement value is an important deter...
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IPC IPC(8): H04L27/26H04J4/00H04W72/08
Inventor 索士强王映民孙韶辉
Owner SHANGHAI ULTIMATE POWER COMM TECH