Virtual lead code based random access method of wireless mobile broadband system

Abstract

The invention relates to a virtual lead code based random access method of a wireless mobile broadband system. The method comprises the following steps: a base station sets a front lead code virtual resource tank and selects a lead code for a UE (User Equipment) meeting a non-competitive random access scene from a dedicated lead code package or a virtual resource tank; the UE transmits the distributed lead code to the base station in a corresponding random access channel; the base station judges whether the received lead code belongs to the virtual resource tank or not, if so, the corresponding time frequency resource information is distributed for the UE preferentially, and otherwise, ordinary random access flow is used for completing the random access; and the UE distributed with the virtual lead code finishes the random access process by the non-competitive random access flow according to the distributed time frequency resource information. The invention has simple and reliable method, does not need to physically change the base station or change the LTE (Long-Term Evolution) protocol, overcomes the shortage of the traditional non-competitive random access method, improves the random access success rate of the UE and reduces the random access time delay of the UE.

Description

technical field [0001] The invention relates to a random access method of a wireless mobile broadband system, in particular to a random access method of a wireless mobile broadband system based on a virtual preamble, and belongs to the field of wireless mobile communication. Background technique [0002] The random access process is an important technology of media access control in the communication system. It is an important link in the LTE (Long Term Evolution, long-term evolution, the evolution of 3G, which began at the Toronto Conference of 3GPP in 2004). The access process between user equipment (UE, User Equipment, such as mobile phones, ipods, data cards and other communication terminal equipment in the communication field with input and output functions) and network communication is mainly used for user uplink timing synchronization adjustment and user Scheduling resource applications. Through random access, the UE can obtain uplink synchronization and obtain initi...

AI Technical Summary

Problems solved by technology

[0016] For some scenarios, such as large-scale user switching or downlink data arrival, due to the limited number of dedicated preambles, it cannot satisfy the dedicated preamble allocation of large-scale users, which in turn causes some users to initiate random access in contention mode instead of non-competition mode random access, and large-scale users initiate contention random access at the same time, collisions will inevitably occur, resulting in a low random access success rate of the UE, and at the same time increasing the UE access delay, thereby affecting the service quality of the UE

[0017] It can be seen that, on the one hand, random access preambles are only divided into two categories: proprietary and non-proprietary, which lack flexibility in the scenarios described above, resulting in the limitation of proprietary preambles; The random access process of non-competition mode is forcibly transferred to the random access of contention mode, which cannot make full use of the information of the UE on the network, which will reduce the success rate of access and increase the access delay

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