Full-duplex cache relay system multi-user scheduling method and system

Abstract

The present invention provides a multi-user scheduling method and system of a full-duplex cache relay system, including the steps of establishing a relay system: setting a plurality of paired source nodes and destination node user pairs, and one working in full-duplex mode Relay site; relay system working mode selection step: make the relay system work in the mode of decoding and forwarding; source node and destination node selection step: select the source node and destination node for sending, that is, select the user pair for sending; scheduling Step: the relay node sends control instructions to all users, and the relay node stores the information sent by the selected source node into the corresponding cache, and extracts data from the corresponding cache and sends it to the selected destination node , to complete the user scheduling in a time slot. The method in the present invention can ensure that the relay cache will not overflow while providing the maximum system throughput rate, and guarantee the service quality of the system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a multi-user scheduling method and system for a full-duplex buffer relay system. Background technique [0002] At present, with the development of wireless communication technology, the disadvantages of the traditional wireless communication mode are becoming more and more prominent. As the next-generation 5G mobile communication standards become increasingly clear, new requirements are put forward for the spectral efficiency of the next-generation wireless communication system. Traditional communication systems all work in half-duplex mode, the most typical ones are Time Division Duplex (TDD) and Frequency Division Duplex (FDD). Orthogonal time slots or frequency bands reduce the spectrum utilization rate of the system. At present, as the access devices of the wireless communication system show an exponential increase trend, the frequency spectrum utiliz...

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to determine whether the relay node can store all the received information without overflow

[0007] 2) When the user selects, it only judges whether the cache of the relay node is empty or full, without considering the size of the specific remaining cache space

Therefore, it is impossible to judge how much data bits can be stored in the buffer in the next time slot

[0008] 3) Since there is no specific number of bits that can be transmitted in a time slot, and the remaining buffer space of the buffer corresponding to the relay node and different users in each time slot, it is impossible to compare the number of bits that can be transmitted by the user with the number of bits that the relay node can transmit. The number of bits of stored information to compare

Therefore, the following situation will occur, even if a certain user is selected, but because the amount of bits that can be transmitted by the user in one time slot is greater than the vacant buffer space of the relay node

overflow of information

[0009] 4) Since the user does not know the free buffer size of the corresponding relay node, the number of transmitted bits cannot be determined, so in addition to the information overflow at the relay node, the user's information is prone to loss, which reduces the user's service quality

Images