Random accessing method, random accessing device and random accessing system

Abstract

The embodiment of the invention discloses a random accessing method, a random accessing device and a random accessing system. The random accessing method comprises the following steps: receiving random accessing information which is sent by user side equipment through a physical random accessing channel; judging whether a leader sequence in the random accessing information is an effective leader sequence or not according to a pre-set leader sequence detection rule; judging whether user side equipment marker information in the random accessing information is correctly analyzed or not according to a check code sent by the user side equipment; sending a random accessing response to the user side equipment through a physical downlink channel under the conditions that the leader sequence is effective and the user side equipment marker is correctly analyzed; receiving dispatching information and / or business data information sent by a physical uplink sharing channel distributed by the user side equipment through network side equipment; and sending feedback information to the user side equipment according to the accuracy of the received dispatching information and / or business data information. With the adoption of the scheme provided by the embodiment, the utilization rate of the physical uplink sharing channel can be improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a random access method, device and system. Background technique [0002] Random access is a basic and very important process in a communication system, which can be divided into: competitive random access and non-competitive random access. Among them, the competitive random access means that after the user-side device randomly selects a preamble sequence, it sends the selected preamble sequence to the network-side device to try to access the network until it establishes a basic signaling connection with the network. the process of. [0003] Taking the user-side device as a mobile phone and the network-side device as a base station as an example, in the prior art, in an LTE (LongTerm Evolution, Long Term Evolution) system, competitive random access is generally implemented through the following steps: [0004] The mobile phone randomly selects the preamble sequence,...

AI Technical Summary

Problems solved by technology

Under normal circumstances, through the above steps, the mobile phone can successfully access the network. However, when two or more mobile phones select the same preamble sequence at the same time, since the preamble sequences sent by each mobile phone to the base station are the same, the base station feeds back the preamble sequence to each mobile phone. The random access response is also the same. In this way, each mobile phone sends scheduling information to the base station through the same PUSCH, and multiple scheduling information interferes with each other. The base station cannot successfully parse each scheduling information, resulting in failure of each mobile phone to access the network. When the mobile phone frequently selects the same preamble sequence for random access at the same time, the success rate of accessing the network is low, and the utilization rate of PUSCH for sending scheduling information is low

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