A relay selection method in a millimeter wave communication system

Abstract

The invention belongs to the technical field of millimeter wave communication, and in particular relates to a relay selection method in a millimeter wave communication system. The technical scheme of the present invention is to add a new load factor broadcast as a part of the system information on the basis of the existing relay search and selection scheme based on received power, and is equipped with a powerful access control method for the network. Helps load balancing and effectively utilizes millimeter-wave spectrum resources. Secondly, the present invention obtains the relay search and selection strategy based on the optimal stopping theory, and optimizes the connection threshold, so that the relay search and selection of the millimeter wave communication using this strategy has the optimal throughput.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave communication, and in particular relates to a relay selection method in a millimeter wave communication system. Background technique [0002] Multi-relay mmWave communication networks such as figure 1 shown. As a prominent feature in 5G networks, MmWave makes direct communication between UEs easy to be blocked. When the 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 via the relay. Relay search generally consists of two steps: (1) searching and acquiring synchronization with the relay, (2) decoding system information containing basic information for accessing the relay. In relay search, the UE shall search for the relay with the s...

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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