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A channel allocation method suitable for multi-frequency Internet of things system

An Internet of Things system and channel allocation technology, which is applied in the direction of transmission path sub-channel allocation, signaling allocation, transmission system, etc., to achieve high reliability

Active Publication Date: 2022-01-28
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, contradictory indicators such as reliability, low latency, and low overhead of non-data signals such as broadcast signals are difficult to balance

Method used

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  • A channel allocation method suitable for multi-frequency Internet of things system
  • A channel allocation method suitable for multi-frequency Internet of things system
  • A channel allocation method suitable for multi-frequency Internet of things system

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Embodiment 1

[0025] This embodiment provides a channel allocation method suitable for a multi-frequency Internet of Things system, refer to figure 1 , which shows the structure diagram of the power system IoT scenario applied in this embodiment. The IoT system application scenario includes automatic power distribution, user power consumption information collection, special transformer load control collection, distributed energy generation, transmission line detection and Emergency repairs, etc. The power grid control center is responsible for unified scheduling.

[0026] In the 230MHz frequency band, there are only 40 discrete frequency points authorized by electric power, and other frequency points are used for other systems. Specific frequency points for power systems such as figure 2 shown. The power Internet of Things system is in TDD mode, so the frequency point N=40 that can be used for downlink transmission. In this embodiment, the number of anchor frequency points is M=N=40.

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Embodiment 2

[0032] This embodiment provides another channel allocation method suitable for a multi-frequency IoT system. like Figure 4 As shown, it can be seen that the method of this embodiment is the same as that of Embodiment 1, so the overhead occupied by broadcast signaling is also the same as that of Embodiment 1. The difference is that in the two adjacent anchor frequency points in this embodiment, the relative offset Δt in time between the system acquisition channel and the paging channel is not a fixed value, but satisfies 0≤Δt≤T-1. In each transmission cycle, the number of system acquisition and paging channels is the same as that in Embodiment 1, that is, the broadcast signal overhead in each transmission cycle is the same. Embodiment 1 and Embodiment 2 illustrate that through reasonable offset totem design, sufficient resources can be reserved for data channels in any transmission unit to support delay-sensitive data services. Through reasonable offset totem design, at leas...

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Abstract

The invention discloses a channel allocation method suitable for a multi-frequency Internet of Things system, comprising: (1) selecting M frequency points from the frequency points used for downlink transmission in the multi-frequency Internet of Things system as anchor frequency points; (2) ) At each anchor frequency point, the bearer system acquires the physical channel and the paging physical channel at the same time, and the transmission period of the system acquiring the physical channel and the paging physical channel is T transmission units; (3) two adjacent The system acquisition physical channel and the paging physical channel in the anchor frequency point are relatively offset in time by Δt transmission units, where 0≤Δt≤T‑1. The present invention enables the multi-frequency Internet of Things system to have high reliability and low delay characteristics while ensuring reasonable broadcast signal overhead.

Description

technical field [0001] The invention relates to communication technology, in particular to a channel allocation method applicable to a multi-frequency Internet of Things system. Background technique [0002] The China Wireless Regulatory Commission authorizes 40 discrete frequency points in 230MHz (480 25KHz frequency points) as dedicated frequency points for power systems, and the remaining frequency points are used for energy, military affairs, meteorology, and water resource protection. Such special frequency band allocation has caused complex interference of the energy Internet of Things in the power system, and brought huge challenges to the primary safety and reliability requirements of the power system. The 40 25kHz frequency points (1MHz bandwidth) of the energy Internet of Things for the power system need to support various services such as information collection, power distribution automation, precise control and even inspection video, which means that the energy I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04L5/00
CPCH04L5/0005H04L5/0044H04L5/0053H04W72/0446H04W72/0453
Inventor 尤肖虎汪茂张菁菁夏婷婷
Owner SOUTHEAST UNIV
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