A method and device for random access channel capacity enhancement based on interleaving

Abstract

The embodiments of the present invention provide an interleave-based method and apparatus for enhancing capacity of a random access channel, wherein the method is applied to a terminal device. The method includes: receiving a set of preamble sequences and at least two interleavers sent by a base station; determining, when a random access is triggered, a to-be-used preamble sequence from the set of preamble sequences as a target preamble sequence, and randomly determining a to-be-used interleaver from the at least two interleavers as a target interleaver; performing interleaving processing on the target preamble sequence by using the target interleaver to generate an interleaved target preamble sequence, wherein, performing interleaving processing on the same preamble sequence by using different interleavers will generate different interleaved preamble sequences; sending a random access request to the base station by using the interleaved target preamble sequence. Applying the embodiments of the present invention can increase the number of available preamble sequences and increase the capacity of the PRACH.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for enhancing the capacity of a random access channel based on interleaving. Background technique [0002] In order to meet the requirements of larger 5G network capacity, faster data rate, lower end-to-end delay, and large-scale equipment connection, New Radio (NR) technology is proposed. NR technology includes initial access technology, large-scale multi- Antenna technology, multiple access technology and channel coding technology. Physical uplink random access channel (PhysicalRandomAccessChannel, PRACH) is an important part of the initial access, its function is to perform random access, and is used to control the user's initial connection, handover, connection re-establishment and uplink synchronization and other functions. [0003] The specific process for the terminal equipment to access the base station through the PRACH is as follows: [0004] In ...

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Problems solved by technology

[0012] However, with the development of services, 5G networks require higher PRACH capacity. However, due to the limited space of PRACH, the number of preamble sequences in the preamble sequence set sent by the base station to the terminal equipment is also limited, resulting in the scenario where a large number of users initiate access In this case, there may be a problem that the success rate of user access is reduced due to insufficient number of preamble sequences, which affects the user experience

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