Random access method, device and system

Abstract

The invention relates to a random access method, device and system, relates to the technical field of communications and can reduce signaling overhead and improves resource utilization. The method comprises the steps that a terminal receives first configuration information, second configuration information and third configuration information sent by a network device, wherein the first configuration information is used for configuring a PRACH time-frequency resource and a leader sequence set, the second configuration information is used for configuring a PUSCH time-frequency resource block corresponding to each PRACH time-frequency resource, and the third configuration information is used for configuring the size of each PUSCH time-frequency resource and the corresponding relationship between the leader sequence and the PUSCH time-frequency resources; and a first message containing a first preamble sequence and uplink data is transmitted, wherein the first preamble sequence is carried on the first PRACH time-frequency resource, and the uplink data is carried on the PUSCH time-frequency resource corresponding to the first PRACH time-frequency resource.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a random access method, device and system. Background technique [0002] In the wireless communication process, the user equipment (user equipment, UE) can establish a connection with the base station (base station, BS) through a random access procedure (random access procedure) and obtain uplink synchronization, and then can send an uplink message to the accessed BS. data. [0003] Currently, a UE can access a BS through a four-step random access procedure. The four-step random access process is specifically as follows: the UE sends a random access preamble (random access preamble), also called message 1 (message1, Msg1 ), to the BS. The BS sends a random access response, also called message two (Msg2), to the UE after detecting the random access preamble. The UE sends an uplink message, also referred to as message three (Msg3), through a data channel (...

AI Technical Summary

Problems solved by technology

[0006] However, in the specific implementation process of the two-step random access process, there is such a problem: when the UE sends MsgA, after selecting a physical random access channel (physical random access channel, PRACH) preamble, how to select the corresponding Physical uplink shared channel (PUSCH) resources are used to send uplink data

For this technical problem, the industry has not yet given a suitable solution

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