A method for accessing unlicensed spectrum in a cellular mobile communication system

Abstract

The invention belongs to the technical field of wireless communication, and relates to a method for accessing an unlicensed spectrum by a cellular mobile communication system. The objective of the invention is to enable a cellular system to fully utilize idle time in a frequency spectrum for transmission. Wherein the idle time refers to the time that no data needs to be transmitted in other systems, i.e., the packet in the current buffer area is transmitted completely, but a new data packet is not reached. Due to the fact that deep reinforcement learning can extract change rules from complex data to achieve effective decision making in a complex dynamic environment, the invention provides that the deep reinforcement learning is utilized to analyze and predict the spectrum occupation situation, and then the access strategy of the cellular system is adjusted in a self-adaptive mode according to the busy degree of the spectrum. Additional control channels or control interfaces do not needto be added to the systems operating on the unlicensed spectrum, the flow change rule in the spectrum data is learned through deep reinforcement, and an intelligent spectrum access scheme of the cellular system under the condition that other system information is not needed is achieved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for a cellular mobile communication system to access an unlicensed frequency spectrum. Background technique [0002] Traditional cellular mobile communication systems need to increase the transmission bandwidth by increasing the number of licensed spectrum to meet the increasing demand for wireless traffic. However, the licensed spectrum is scarce and the license fee is high, so it is difficult to completely rely on the licensed spectrum to fill the gap in traffic demand and system capacity. On the other hand, unlicensed spectrum is abundant and underutilized. Therefore, allowing cellular mobile communication systems to access unlicensed spectrum to provide services to users is an efficient and low-cost system expansion method. Since the unlicensed spectrum is open to access, it carries a large number of different types of systems, such as WiFi, Bluetooth,...

AI Technical Summary

Problems solved by technology

Although these systems use a simple random access method to avoid collisions, this method will increase communication delays, which is unacceptable for cellular systems that are highly sensitive to communication quality

In addition, various systems working on unlicensed spectrum lack the required control channels and control interfaces for mutual cooperation, which also makes it difficult for cellular systems to adjust their own access strategies according to the actual traffic on unlicensed spectrum

On the contrary, if the cellular system ignores other systems on the unlicensed spectrum, it will greatly increase the probability of channel collision, reduce the effective utilization of the spectrum, and violate the principle of fair use of the unlicensed spectrum

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