Real-time decoding method and device in coding time-slot ALOHA system

Abstract

The invention relates to a real-time decoding method and device in a coding time-slot ALOHA system and belongs to the technical field of multiple access. The device comprises a storage module, a code packet yi and vector ci receiving module, a ci operation module and a decoding result output module; the storage module and the code packet yi and vector ci receiving module both are connected with the ci operation module and the decoding result output module, respectively; the storage module is used for storing a matrix and code packets corresponding to vectors of various rows of the matrix; the code packet yi and vector ci receiving module, is used for receiving the code packets and the vectors thereof arriving sequentially, and outputs each received packet to the ci operation module every time the packet is received, and after the feedback of the ci operation module to the last packet is obtained, the decoding result output module is notified of outputting; the ci operation module is used for performing operations on input ci and yi, the matrix and the code packets corresponding to the vectors of various rows of the matrix according to a preset rule; the decoding result output module is used for outputting the matrix and the code packets corresponding to the vectors of various rows of the matrix. Compared with the prior art, the real-time decoding device has the advantages of real-time decoding, high throughput and low complexity.

Description

technical field [0001] The invention relates to a decoding method and device, in particular to a real-time decoding method and device in an encoded time slot ALOHA system, and belongs to the field of multiple access technology. Background technique [0002] As a next-generation mobile communication technology, 5G aims to meet higher-end and more complex performance requirements, and one of its goals is to provide unlimited information. As an important part of 5G, access to Machine-Type-Communication (MTC, Machine-Type-Communication) has a wide range of potential application scenarios. MTC has typical characteristics such as a wide range of applications, diverse business models, a large number of terminals, small data packets, high uplink utilization, and time control. It is estimated that the number of connected mobile terminal users will increase to about 50 billion in 2020, and a large part of the increase is due to the introduction of a large number of MTC devices. The ...

AI Technical Summary

Problems solved by technology

[0007] Although the serial interference cancellation (SIC) decoding algorithm is used in CSA and achieves high throughput, it still has two disadvantages: one is that the SIC decoding algorithm can only start to operate when the transmission is over

This will cause a lot of delay and waste of computing power of the receiver

Another disadvantage is that the SIC decoding process can only start from packets without conflicts, which causes decoding to fail even if the receiver has received k mutually independent vectors (packets).

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