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Pilot collision detection method, device and system

A technology of collision detection and pilot, which is applied in the field of wireless communication, can solve the problems of detecting pilot collision and the number of conflicting terminals, wireless resources and time overhead, etc., so as to reduce energy consumption and delay, avoid wireless resources and time Overhead, the effect of facilitating resource allocation

Active Publication Date: 2021-03-16
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a pilot collision detection method for a distributed multi-antenna wireless communication system. According to the received pilot signal, the pilot collision and the number of conflicting terminals are detected, which leads to the technical problem of large wireless resource and time overhead

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  • Pilot collision detection method, device and system
  • Pilot collision detection method, device and system
  • Pilot collision detection method, device and system

Examples

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Effect test

Embodiment 1

[0040] A pilot frequency collision detection method is applied in a distributed multi-antenna wireless communication system (including a base station and an MTC terminal), wherein the base station is composed of M access points (Access Point, AP) and 1 base station baseband processing unit (CPU ), the AP serial numbers are 1 to M in turn; each AP is configured with K transceiver antennas, and each AP is evenly distributed in the network covered by the base station; all APs are connected to the base station CPU through a forward backhaul link. The base station CPU can collect received signals on all APs for centralized signal processing. In addition, in the network covered by distributed APs, there are randomly distributed MTC terminals; in each random access time slot, each MTC terminal will access the network with a certain activation probability; the activation access probability is usually much less than 1 . During the random access process, an activated MTC terminal (havi...

Embodiment 2

[0069] A base station, including M access points and a base station baseband processing unit; each access point is evenly distributed in the network covered by the base station, and connected to the base station baseband processing unit through a forward backhaul link;

[0070] The access point is used to detect any pilot p in the preset pilot pool without collision detection after receiving the pilot signal l , calculate the received and pilot p l The corresponding pilot signal strength is sent to the baseband processing unit of the base station;

[0071] The base station baseband processing unit is used to receive the pilot signal strength sent by each access point, and to obtain the pilot signal intensity received by all access points and the pilot signal p l After the corresponding pilot signal strength, a vector of length M is formed, denoted as pilot p l The corresponding pilot signal strength characteristics; the pilot p l The corresponding pilot signal strength feat...

Embodiment 3

[0075] A pilot collision detection system, comprising: an MTC terminal and the base station provided in Embodiment 2 of the present invention;

[0076] The MTC terminal is used to randomly select a pilot from the preset pilot pool φ in a random access time slot when there is a need for data transmission, and send it to the base station;

[0077] Among them, the preset pilot pool φ=[p 1 ,p 2 ,...,p L ], L is the length of the preset pilot pool; different pilots in the preset pilot pool are orthogonal to each other.

[0078] The relevant technical solutions are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a pilot collision detection method, device and system, and the method comprises the steps: S1, calculating the intensity of a received pilot signal corresponding to any undetected pilot pl in a preset pilot pool after a distributed access point in a base station receives the pilot signal; S2, after pilot signal intensities corresponding to the pilot pl and received at all access points are obtained, forming a vector; S3, inputting the obtained vector into a pre-trained pilot collision detection model to obtain a collision number of the pilot p1, and repeating the step S1S3 until all pilots in the preset pilot pool complete collision detection. When MTC massive terminals are randomly accessed, pilot collision and the number of conflicting terminals can be rapidly detected only according to received pilot signals, so extra wireless resources and time expenditure in random access are avoided, and energy consumption and time delay of access terminals in random access are reduced, so that the base station can carry out timely and effective resource allocation conveniently, and the random access performance of the terminal is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically, relates to a pilot frequency collision detection method, device and system. Background technique [0002] As the main application scenario of the fifth generation mobile communication (5G), machine type communication (MTC) has great development prospects. It is estimated that by 2030, the number of global MTC terminal connections will be close to 100 billion, of which China will exceed 20 billion. In a wireless communication system, an intelligent MTC terminal sends uplink data to the base station through random access, where random access is an indispensable part of the wireless communication system; it refers to the The terminal uses dedicated time slots and spectrum resources to request the base station to allocate wireless resources for communication or to directly send data. The existing random access methods related to the present invention are: [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/06H04W24/02H04L27/26
CPCH04W24/06H04W24/02H04L27/26Y02D30/70
Inventor 丁杰屈代明
Owner HUAZHONG UNIV OF SCI & TECH
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