Method and apparatus for resource scheduling of cellular mobile communication system

Abstract

The invention relates to a resource attemper method of beehive mobile communication system that comprises: obligating some attemper set which includes definite number of sub frequency bands or definite time section or sub frequency bands and time section, and the attemper set are different with each other; judging whether the terminal is edge of area, if it is, choosing sub frequency band or time section or sub frequency bands and time section for the terminal in obligated area set; if else, choosing sub frequency band or time section or sub frequency bands and time section for the terminal outside the obligated area set. Besides, the invention also provides a device of realizing the method; the device includes resource divider, terminal judger, and resource selector. The invention uses interference correspond method to decrease interference between areas, the other hand it uses frequency domain or time domain attemper to improve performance of system.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a resource scheduling method and device for a cellular mobile communication system. Background technique [0002] In a communication system based on Orthogonal Frequency Division Multiplexing (OFDM: Orthogonal Frequency Division Multiplexing), a frequency domain scheduling method is usually used to select a suitable sub-frequency band for transmitting data for a terminal, so as to make full use of the frequency selectivity in the broadband communication system. As shown in Figure 1, the relative power of each subcarrier received by different terminals at the receiving end (compared with the same reference value) is different, and the relative power of terminal 1 on 30-120 subcarriers is higher, while Terminal 2 has higher relative power on subcarriers 120-160 and 240-280. In this way, when performing resource allocation, subcarriers 30-120 are assigned to terminal 1, an...

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Problems solved by technology

[0012] In the case where there is only one cell in the system, the above frequency domain scheduling can give full play to its role, but in a multi-cell cellular mobile communication system, the reliability of terminal transmission is not only affected by infinite channel fading, but also by interference , and in OFDM-based communication systems, inter-cell interference will be more serious

Therefore, although the time correlation of the wireless channel can be used to predict the channel fading value at a certain moment using the measured value of fading at a certain moment, the interference measured value at a certain moment cannot be used to predict the interference at the next moment value, that is, inter-cell interference does not have continuity, which affects the performance of frequency domain scheduling

For example, in a cellular mobile communication system, when two of the cells reassign the corresponding sub-frequency bands to the terminals in their respective cells after measuring the channel quality on each sub-frequency band, then data transmission is performed on these terminals, because If the sub-frequency band used by the terminal in the outer cell changes, then for any terminal, the interference it receives has changed, so the reliability of its data transmission will be affected

At this time, the traditional frequency domain scheduling will not be able to play its due role

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