Relay selection method in millimeter wave communication system

Abstract

The invention belongs to the technical field of millimeter wave communication, and particularly relates to a relay selection method in a millimeter wave communication system. According to the technical scheme, on the basis of an existing relay search and selection scheme based on received power, a new load factor broadcast is added to serve as a part of system information, a powerful access control method is provided for a network, load balance is facilitated, and millimeter wave spectrum resources are effectively utilized. Secondly, a relay search and selection strategy is obtained based on an optimal stop theory, and a connection threshold is optimized, so that the throughput of the relay search and the selected millimeter wave communication using the strategy is optimal.

Description

Technical field [0001] The invention belongs to the technical field of millimeter wave communication, and specifically relates to a relay selection method in a millimeter wave communication system. Background technique [0002] Multi-relay millimeter wave communication network such as figure 1 Shown. MmWave, as a significant feature in 5G networks, makes direct communication between UEs easily blocked. When direct communication between UEs cannot be carried out, the communication can be carried out by means of a relay. The high-density relay deployment scheme in the 5G network makes a large number of available relays around the UE. The UE needs to perform basic relay search and selection before communicating with the relay. The relay search usually includes two steps: (1) searching and obtaining synchronization with the relay, (2) decoding the system information containing the basic information for accessing the relay. In the relay search, the UE should search for the relay w...

AI Technical Summary

Problems solved by technology

[0009] The problems in this traditional method include: firstly, when the UE searches for and selects the relay, it does not consider the number of active UEs connected to the relay, which will cause load imbalance in the communication network, making the low power but The number of micro-relay connections that also work on the mmWave spectrum is extremely small, resulting in unbalanced mmWave network load and wasting mmWave spectrum resources

Secondly, since the UE will check all the relays around the UE for relay search and selection in each communication cycle, this will cause the UE to waste a lot of time in checking the relays, reduce the effective communication time in the communication cycle, and improve the throughput. volume reduction

Finally, due to factors such as time-varying radio environment, UE mobility, and clock drift, UE synchronization with previously checked relays may become outdated, resulting in communication access failures

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