Random access process preamble retransmission counting method and terminal

Abstract

The present invention provides a random access process preamble retransmission counting method and a terminal and belongs to the communication technological field. The preamble retransmission countingmethod includes the steps that: if it is detected that a random access response is not correctly received or a contention resolution fails during a random access process, the number of the times of preamble retransmission and/or the number of the times of the power climb of preamble transmission are counted according to a set counter. According to the above technical schemes of the invention, ifit is detected that the random access response is not correctly received or the contention resolution fails during the random access process, the number of the times of the preamble retransmission and/or the number of the times of the power climb of the preamble transmission are counted according to the set counter; and therefore, the problem that a single counter fails to simultaneously to countthe number of the times of power climb and the number of the times of preamble transmission can be solved. With the random access process preamble retransmission counting method and the terminal provided by the embodiments of the present invention adopted, the reliability of the communication of an NR (new radio) system can be ensured.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for counting retransmissions of a preamble in a random access process and a terminal. Background technique [0002] RACH (Random Access Channel) is a random access channel, which is an uplink transmission channel. The RACH is received in the entire cell, and is often used for PAGING (paging) response and MS calling / logging access. [0003] Random access trigger conditions include: 1. Initial access in RRC_IDLE; 2. Initial access when the wireless link is disconnected; 3. Random access is required during handover; 4. When random access is required in the RRC_CONNECTED state, receiving When receiving downlink data, such as when the uplink synchronization state is "asynchronous"; 5. When a random access process is required in the RRC_CONNECTED state, uplink data is received, such as when the uplink synchronization state is "asynchronous" or when there is no PUCCH re...

AI Technical Summary

Problems solved by technology

[0024] Embodiments of the present invention provide a method and terminal for counting preamble retransmissions in a random access process, to solve the problem that power ramping and preamble transmission counting cannot be satisfied at the same time when a single counter is used for both power ramping and preamble transmission counting function, the reliability of NR system communication cannot be guaranteed

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