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Uplink SCMA transmitting method and receiving method based on codebook multiplexing

A receiving method and codebook technology, which are applied in the field of uplink SCMA reception based on codebook multiplexing, can solve the problems of no multiple users multiplexing the same codebook and the number of access users, etc., and achieve user access. The effect of increasing the number of inputs and increasing the capacity effect

Inactive Publication Date: 2020-04-28
SHANGHAI RES CENT FOR WIRELESS COMM
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Problems solved by technology

However, none of these existing design methods allow multiple users to reuse the same codebook in the uplink, so the number of users to access depends on the number of codebooks
In the paper "Optimization of Codebook Allocation in Sparse Code Multiple Access System" (published in "Signal Processing" Vol. This codebook can be allocated dynamically, but a codebook can only be allocated to one user at all times, and multiple users cannot share a codebook at the same time.

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  • Uplink SCMA transmitting method and receiving method based on codebook multiplexing
  • Uplink SCMA transmitting method and receiving method based on codebook multiplexing
  • Uplink SCMA transmitting method and receiving method based on codebook multiplexing

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Embodiment Construction

[0038] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] In order to solve the access problem of a large number of users in the 5G Internet of Things, the present invention proposes an uplink codebook multiplexing method without involving complex power allocation modes and changing resource allocation methods, so that β Users multiplex the same codebook, so that the number of users accessing the system is increased by β times of the original. In this way, the number of simultaneous access users can be greatly increased.

[0040] Specifically, the present invention firstly provides a SCMA method based on codebook reuse (CB-reuse-SCMA). Wherein, a base station (base station, BS) allocates the same codebook for multiple users, and then the users perform uplink transmission according to the allocated codebook. Finally, the BS side decodes the uplink data based ...

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Abstract

The invention discloses an uplink SCMA transmitting method and an uplink SCMA receiving method based on codebook multiplexing. The uplink SCMA transmitting method comprises the following steps that abase station allocates codebooks to a plurality of users in a scheduling period, wherein the same codebook is allocated to a specific number of users; the users perform SCMA codebook mapping accordingto the allocated codebook to obtain code words; and the users send the code words to the base station by using a sparse spread spectrum method. According to the invention, the system capacity can beimproved on the premise of not designing a complex power distribution mode and not changing a resource distribution mode.

Description

technical field [0001] The invention relates to an uplink SCMA transmitting method based on codebook multiplexing, and also relates to an uplink SCMA receiving method based on codebook multiplexing, belonging to the technical field of wireless communication. Background technique [0002] The International Telecommunication Union (ITU) has defined three major scenarios of 5G: enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), and low-latency highly reliable communication (URLLC), among which eMBB can be regarded as 4G mobile broadband technology evolution. In 5G, non-orthogonal multiple access technologies such as SCMA improve resource utilization by sharing resources among multiple users. [0003] SCMA (Sparse Code Multiple Access, multiple access) directly maps different bit streams to different sparse codewords. The SCMA system is mainly composed of four parts: SCMA encoding, MPA (Message Passing Algorithm) detection, Turbo encoding, and decodin...

Claims

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Application Information

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IPC IPC(8): H04B7/0456
CPCH04B7/0456
Inventor 杜军均易辉跃许晖张武雄裴俊
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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