Multi-cell joint adaptive modulation coding method based on round robin scheduling

Abstract

The present invention discloses a multi-cell joint adaptive modulation coding method based on round robin scheduling. The method comprises the following steps of (1) calculating the user channel quality; (2) predicting the user channel quality; (3) at the current scheduling moment, enabling all base stations to schedule all users of each base station based on a round robin scheduling algorithm, and distributing the resource blocks to all users to obtain the resource scheduling lists of all base stations; (4) according to the resource scheduling lists obtained in the step (3), calculating the signal to noise ratios of all scheduled users at the current scheduling moment; (5) according to a mapping criterion between the signal to noise ratios and the modulation coding schemes, selecting the modulation coding schemes for the users. The multi-cell joint adaptive modulation coding method based on the round robin scheduling of the present invention can simulate the cofrequency interference of the users at the data transmission moment more accurately, so that the channel quality predication at the data transmission moment is more accurate, the selected modulation coding schemes can adapt to the channel states at the data transmission moment better, and the transmission performance of a system is improved effectively.

Description

technical field [0001] The present invention relates to an adaptive modulation and coding method adopted in a multi-cell environment where co-channel interference between users is serious, and specifically relates to a multi-cell joint adaptive modulation and coding method based on round robin scheduling, which belongs to The field of new generation mobile communication technology. Background technique [0002] In a wireless communication system, the wireless channel will be time-varying due to factors such as signal propagation loss and fading. How to adapt to the time-varying channel and greatly improve the data transmission rate and frequency band utilization within a limited bandwidth has gradually become a communication issue. research hotspots. In LTE (Long Term Evolution, long-term evolution), the link adaptive technology is at the receiving end, according to the measured channel quality information, adaptively adjusts the data transmission parameters to match the ch...

AI Technical Summary

Problems solved by technology

When the channel conditions are good, a high-order modulation and coding scheme is adopted, at this time, the anti-interference and error correction capabilities are low, but the data transmission rate is high; when the channel conditions are poor, a low-order modulation and coding scheme is adopted, At this time, the data transmission rate is low, but the anti-interference and error correction capabilities are strong

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