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User adaptive access method and device for realizing large-scale URLLC

An adaptive and large-scale technology, applied in channel estimation, electrical components, baseband system components, etc., can solve problems such as unrealistic, huge deployment costs and future maintenance costs

Active Publication Date: 2022-01-11
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

However, when the system needs to accommodate a large number of access users, if only a large number of APs are deployed to ensure high-quality communication of users, the required deployment costs and future maintenance costs are huge and unrealistic

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  • User adaptive access method and device for realizing large-scale URLLC
  • User adaptive access method and device for realizing large-scale URLLC
  • User adaptive access method and device for realizing large-scale URLLC

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Embodiment Construction

[0028] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0029] Non-Orthogonal Multiple Access (NOMA) has been identified as a promising technology. NOMA technology transmits multiple information streams on overlapping channels in the time domain / frequency domain / code domain with different power, and provides wireless services for multiple users on the same wireless resources at the same time. In an Orthogonal Multiple Access (OMA) system, only a single wireless resource can be allocated to a user, for example, by frequency division or time division, while the NOMA technology can ...

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Abstract

The invention relates to the technical field of wireless communication, in particular to a user adaptive access method and device for realizing large-scale URLLC, and the method comprises the steps: carrying out user grouping of a plurality of users with URLLC demands in a power domain according to the distance from an access point, and obtaining a plurality of NOMA groups; performing channel estimation by using a least square channel estimation method, and obtaining a detection signal of each user of each NOMA group; and calculating a corresponding posterior signal-to-noise ratio based on the detection signal of each user, calculating an error probability corresponding to the user according to the posterior signal-to-noise ratio, and continuing allocation according to the number of dynamically allocated available channels of the current group under the condition that the error probability is smaller than a preset threshold so as to realize user adaptive access of the URLLC. Therefore, multiplexing of a large number of users can be realized, interference among the users is reduced, and high-quality communication of the large number of users is ensured.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a user adaptive access method and device for implementing large-scale URLLC. Background technique [0002] Ultra-Reliable and Low-Latency Communications (URLLC) plays an indispensable role in the Internet of Things (IoT), which requires the error probability (Errorprobability, EP) to be less than 10 -5 , with a latency below 0.5 milliseconds. In sixth-generation (6G) mobile communication systems, the demand for wide-area IoT with a large number of devices is expected to continue to grow. In addition, the coverage of 6G mobile communication system will include cities and remote villages, and it is necessary to provide high-quality communication for a large number of potential users. Therefore, it is crucial to realize large-scale URLLC. The research on implementing URLLC has made considerable progress on the classic fading models (Rice, Rayleigh, etc.)....

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/08H04L25/02
CPCH04W72/0453H04L25/024H04W72/53H04W72/54
Inventor 曾捷周世东武腾宋雨欣谷慧敏张秀军赵明
Owner TSINGHUA UNIV
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