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Method for dynamically adjusting transmitting power to wireless terminal

A wireless terminal, transmit power technology, applied in power management, wireless communication, electrical components and other directions, can solve the problem of good or bad link quality, and achieve the effect of reducing power consumption

Active Publication Date: 2016-04-20
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 LoRa TM For radio frequency chips, you can choose THsn_high=-100dBm (the first threshold under high power), THsn_low=-110dBm (the first threshold under low power), and THbcn=-100dBm (the second threshold).

[0045] 2. Preferably, for LoRa TM For radio frequency chips, the recommended transmit power level TXnext is a collection of high tx level (high power) and low tx level (low power), which can be +20dBm and +13dBm respectively. The emission current under +20dBm is 120mA, and the emission current under +13dBm is 29mA, the difference is more than 4 times.

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

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

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

[0049] Hi...

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PUM

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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 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 battery-powered and require low power consumption to achieve a longer service life. The distance between the node and the gateway is close or far, and the conditions such as obstructions cause the quality of the link between the node and the gateway to be good or bad. For a good link quality, the node can use a lower transmission power to send a message, and for a bad link quality, the node needs to use a higher transmission power. Moreover, the link quality will change under certain circumstances, such as new obstructions. Therefore, the link quality between the node and the gateway must be estimated in real time, and the transmitting power of the node must be dynamica...

Claims

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Application Information

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Patent Type & Authority Applications(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