Orthogonal frequency division multiple access (OFDMA) resource scheduling method adopting cross-layer feedback information

Abstract

The invention belongs to the technical field of communication and particularly relates to a resource scheduling method for cross-layer orthogonal frequency division multiple access (OFDMA) by adopting high-layer feedback information. The dependent information includes acknowledgement / negative acknowledge (ACK / NAK) information fed back by a scheduling user at a last time period and full spectrum band signal to noise ratio information periodically fed back by all users. A scheduling problem can be abstracted as a partial Markov decision process problem. The invention provides a similar algorithm, wherein a posteriori distribution of a channel is updated by channel collateral information provided by the ACK / NAK information, and meanwhile, the complexity of the algorithm is reduced by particle filter; and for acquiring more multi-user gains, an error caused by posteriori distribution prediction merely relying on the ACK / NAK information by adopting signal noise ratio (SNR) information which is fed back in the invention is corrected. According to the method provided by the invention, the system performance can be effectively improved, and particularly the performances of the multi-user gains can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and specifically relates to a cross-layer OFDMA resource scheduling method using high-layer feedback information. Background technique [0002] Multiple Input Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is a new high-speed data transmission technology. The MIMO technology can significantly increase the channel capacity of the wireless communication system and enhance the reliability of data transmission by using multiple transmitting antennas and receiving antennas. OFDM technology can convert frequency selective fading channels into a group of orthogonal flat fading channels, so OFDM technology can be applied in MIMO system to overcome the influence of multipath fading. MIMO-OFDM technology is considered by the industry as the main physical layer technology of the fourth generation mobile communication system. [0003] Orthogonal Frequency Division Multiple A...

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Problems solved by technology

However, as the number of users increases, the multi-user gain of the system will be very insignificant

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