Method and system for random access to heterogeneous network

Abstract

The invention discloses a method for random access to a heterogeneous network, which includes: receiving random access messages initiated by a user terminal; according to the random access messages, sectionalizing all component carriers of the user terminal based on the timing advance to form carrier groups; sending the responding messages of random access to the user terminal, so that the user terminal can finish the random access on the component carriers of the carrier groups. The invention further provides a corresponding system for random access to the heterogeneous network, which comprises the user terminal and base stations. By the aid of the method and the system for random access to the heterogeneous network, the rate of resource conflict arising in the heterogeneous network can be reduced effectively and the success rate of the random access performed by the user equipment can be improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a random access method and system in a heterogeneous network. Background technique [0002] In the next-generation broadband wireless communication network, solving the problem of how to support a larger bandwidth under the bandwidth of the current wireless communication system has become a key factor to improve the throughput of user terminals between cells and the average throughput of user terminals. At present, in the Long Term Evolution (LTE, Long Term Evolution) of the Third Generation Partnership Project, it is proposed to use carrier aggregation to effectively support a larger bandwidth in the current wireless communication system, so as to meet the needs of the new generation of wireless standards. Requirements for indicators such as throughput and peak rate. Carrier aggregation is a key technology for supporting larger bandwidth in future wireless communic...

AI Technical Summary

Problems solved by technology

When the CIF and SI are transmitted on the control channel scrambled with the random access radio network temporary identifier (RA-RNTI, Random Access Radio Network Temporary Identifier) ​​or cell radio network temporary identifier (C-RNTI, Cell Radio Network Temporary Identifier) When , the CIF and SI indicating resource transfer on each control channel need to be included in the common search interval of each component carrier (CC, Component Carriers), which will lead to the lack of resources in the common search interval, and, due to the introduction of A new downlink control information (DCI, Downlink Control Information) format was added, resulting in an increase in the number of blind decoding attempts in the common search interval

Images