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5G authorization-free retransmission access technology outage probability assessment method

An access technology, authorization-free technology, applied in the field of 5G authorization-free retransmission access technology interruption probability assessment, can solve the problem of not being able to reveal the impact of the interruption probability of the short packet transmission system

Pending Publication Date: 2022-03-01
SOUTHEAST UNIV
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a method for evaluating the interruption probability of 5G authorization-free retransmission access technology, so as to solve the technical problem that the impact of delay constraints on the interruption probability of the short packet transmission system cannot be revealed

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  • 5G authorization-free retransmission access technology outage probability assessment method
  • 5G authorization-free retransmission access technology outage probability assessment method
  • 5G authorization-free retransmission access technology outage probability assessment method

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Embodiment 1

[0089] see figure 1 , this embodiment provides a 5G authorization-free retransmission access technology interruption probability assessment method, including the following steps:

[0090] Step 1. Real-time users transmit data packets in the form of short packets, and access the base station through the system transmission scheme;

[0091]Specifically, in URLLC service requirements, the most typical feature is short packet transmission. Short packets have their own encoding rate and Shannon capacity solution methods. To accurately analyze the system outage probability under the URLLC short packet service, it must be combined with its unique limited block length encoding method. Real-time users use a contention-based authorization-free method to access the base station, and transmit the same subpacket on consecutive time slots. During each round trip, each subpacket can receive decoding feedback after several TTIs. If the transmission If successful, positive feedback will be ...

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Abstract

The invention discloses a 5G authorization-free retransmission access technology outage probability evaluation method, which comprises the following steps that a real-time user transmits the same sub-packets on continuous time slots, the maximum value of the number of the sub-packets is K, and a base station side feeds back a decoding result to the user after receiving the sub-packets so as to decide whether to retransmit the sub-packets; system time delay analysis and outage probability modeling: analyzing and deducing transmission time delay of a one-time round-trip process of the system, and establishing an outage probability problem model in combination with time delay constraint: obtaining a signal to interference plus noise ratio of a receiving end according to a power threshold value and noise power, the outage probability is the probability smaller than a signal to interference plus noise ratio threshold value within the time delay constraint; and system transmission outage probability: utilizing a probability theory and stochastic geometry to solve an outage probability closed solution. According to the method, the system outage probability of combination of authorization-free access and auxiliary packet transmission can be accurately evaluated, and the influence of system parameters of a network on the information transmission outage probability can be revealed.

Description

technical field [0001] The invention relates to the field of authorization-free transmission systems, in particular to a method for evaluating the interruption probability of 5G authorization-free retransmission access technology. Background technique [0002] The rapid development of the Internet of Things (IoT) is considered a revolution in our future world. Massive machine-type communication (mMTC) and ultra-reliable low-latency communication (URLLC), as two major IoT scenarios in 5G, put forward higher requirements for wireless communication systems. Therefore, it is necessary to study the application of new wireless technologies in IoT scenarios. This paper mainly studies the random access technology in the communication system. Previous research work has proved that authorization-based access technology is no longer applicable to 5GIoT scenarios. Faced with the emergence of a large number of sporadic short packet services, the authorization-based access technology w...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04B17/336H04B17/391H04L1/18H04W74/08
CPCH04L1/1607H04W74/0833H04B17/391H04B17/336H04B17/3911H04L1/1812
Inventor 张华张娜娜王俊波
Owner SOUTHEAST UNIV
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