Random access method, base station and terminal

Abstract

The invention provides a random access method, a base station and a terminal. The method includes: obtaining a first preamble in a first random access request sent by the terminal and a second preamble in a second random access sent after sending the first random access request; generating access response information carrying an identifier according to the first preamble and the second preamble, and sending the access response information to the terminal; and receiving uplink data sent by the terminal according to the identified access response information, wherein the access response information is access response information of the terminal identified by the terminal according to the identifier; and feeding back a contention resolution message to the terminal according to the uplink data. The random access method can avoid the blocking of a random access process and improve the success probability of terminal access.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a random access method, a base station and a terminal. Background technique [0002] In the contention-based random access process of the existing terminal (UE), the base station (eNB) will receive the random access request message Msg1 of many terminals, and infer the RA-RNTI (used for random access) according to the time-frequency resource of Msg1. The corresponding wireless network temporary identifier), and on the time-frequency resource, the preamble selected by the terminal can be decoded, and then the preamble can be obtained. Since the preamble is orthogonal, the eNB can decode all the preambles. [0003] The eNB can identify UEs that use different time-frequency resources and different preambles, and will allocate C-RNTI (Radio Network Temporary Identity), timing advance, etc. to these UEs in the random access request response message, but the eNB cannot d...

AI Technical Summary

Problems solved by technology

[0003] The eNB can identify UEs that use different time-frequency resources and different preambles, and will allocate C-RNTI (Radio Network Temporary Identity), timing advance, etc. to these UEs in the random access request response message, but the eNB cannot distinguish the selected UEs. UEs with the same preamble

[0004] In the existing random access process, whether it is contention random access or non-contention random access, when multiple UEs send the same preamble on the same time-frequency resource, the eNB cannot perceive the collision and sends an access code to these UEs. Response information, all UEs that match the RA-RNTI (Radio Network Temporary Identifier) ​​and the preamble corresponding to the access response information use the same uplink authorization to send subsequent messages, resulting in conflicts, resulting in random access procedures blocked

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