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Method for Dynamically Adjusting Transmitting Power of Wireless Terminals

A wireless terminal and transmission power technology, applied in wireless communication, power management, electrical components, etc., can solve problems such as good or bad link quality, and achieve the effect of reducing power consumption

Active Publication Date: 2019-01-25
武汉慧联无限科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distance between the node and the gateway is close or far, and the obstructions and other circumstances lead to the quality of the link between the node and the gateway.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0044] 1. Preferably, for the LoRaTM radio frequency chip, THsn_high=-100dBm (first threshold under high power), THsn_low=-110dBm (first threshold under low power), THbcn=-100dBm (second threshold) can be selected.

[0045] 2. Preferably, for the LoRaTM radio frequency chip, the proposed transmission power consumption level TXnext set, that is, high tx energy level (high power), low tx energy level (low power), can be respectively taken as +20dBm, +13dBm. The emission current at +20dBm is 120mA, and the emission current at +13dBm is 29mA, a difference of more than 4 times.

[0046] 3. Preferably, N can be 3.

[0047] 4. For example, the signal strength Ssn[3] of the node event message frame received by the gateway for N consecutive 3 times and the feedback received Sbcn[3] (signal strength of the received beacon frame), Sgw[3] (received The signal strength of the proposed data frame) is:

[0048] High tx energy level, Ssn[1]=-90dBm, Sbcn[1]=-90dBm, Sgw[1]=-93dBm.

[0049] H...

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Abstract

The invention discloses a method for dynamically adjusting transmitting power to a wireless terminal. The method comprises the steps that gateway equipment transmits beacon frames during the fixed beacon period, and the wireless terminal receives the beacon frames and records signal intensity of the beacon frames; the wireless terminal transmits event information frames to the gateway equipment with preset transmitting power within one beacon period; the gateway equipment makes a response in the form of transmitting advice data frames to the wireless terminal, the advice data frames contain information of preset transmitting power selected by the wireless terminal, and the wireless terminal receives the advice data frames and records the signal intensity of the advice data frames; the wireless terminal selects transmitting power used for transmitting event information frame next time from multiple kinds of preset transmitting power according to the advice data frame received most recently, the signal intensity of the beacon frame received most recently and the signal intensity of the advice data frame received most recently. The method can adjust the transmitting power dynamically, and reduce unnecessary power dissipation of nodes.

Description

technical field [0001] The present invention relates to the related field of wireless internet of things. More specifically, the present invention relates to a method for dynamically adjusting the transmit power of a low-power wireless terminal. Background technique [0002] In wireless sensor networks, nodes are often powered by batteries, which require low power consumption for longer service life. The distance between the node and the gateway varies from near to far, and in addition to obstructions, the quality of the link between the node and the gateway varies. For a good link quality, the node needs to use a lower transmit power to send messages, and for a bad link quality, the node needs to use a higher transmit power. Moreover, the link quality will change under certain circumstances, such as new occluders. Therefore, it is necessary to estimate the link quality between the node and the gateway in real time, and dynamically adjust the transmit power of the node to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/04H04W52/28
CPCH04W52/04H04W52/281
Inventor 杨广学刘传鹏
Owner 武汉慧联无限科技有限公司