Random channel access method in access physical layer for wireless telecommunication system

Abstract

The key features of invention includes: according to the numbers successfully accessing to random access channel in physical layer, and the numbers rejecting to access, and energy of signal of each subscribe, determines the subscriber permitting to access the random access channel in physical layer, and then makes it access to random access channel in physical layer. When the random access channel in physical layer is lack of demodulation resource, and has high error rate of translation, the invention can reject some accesses from subscribes with bad signal quality, and allow some accesses from subscribes with good signal quality, by which the utilization of demodulation resource in random access channel in physical layer is improved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for a user to access a physical layer random access channel in a wireless communication system. Background technique [0002] In the wireless communication system, the structural diagram of the physical layer random access channel is shown in the attached figure 1 shown. [0003] exist figure 1 Among them, the physical layer random access channel is composed of Preamble (access prefix) and message (message). The process of users accessing the physical layer random access channel complies with the TS25.214 protocol. [0004] The process of a user accessing a physical layer random access channel mainly includes two processes of preamble capture and message demodulation. After the preamble capture is successful, the message demodulation process is guided. [0005] When the number of access users in the wireless communication system is large, the demodulati...

AI Technical Summary

Problems solved by technology

[0005] When the number of access users in the wireless communication system is large, the demodulation resources of the physical layer random access channel often cannot meet the demodulation needs of all access users. The decoding error rate of the input channel is high, which will cause a waste of a large amount of demodulation resources of the physical layer random access channel. In this case, the current communication system has no solution, only waiting for the automatic reduction of the number of users

[0006] To sum up, when the demodulation resources of the physical layer random access channel are insufficient, if users with poor signal quality occupy a large amount of demodulation resources, it will affect the access of users with better signal quality to the physical layer random access channel. resulting in a low user access rate

Images