Method for combined adjustment of adaptive rate and power of remote WiFi link

An adjustment method and self-adaptive technology, applied in power management, sustainable buildings, transmission systems, etc., can solve the problems of slow response of link conditions and inability to adapt to rapid changes in channels, and achieve low additional overhead and reduce equipment power consumption. Effect

Active Publication Date: 2011-02-16
TIANJIN UNIV
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Problems solved by technology

The implementation of the method is relatively simple and easy to implement, but it is also a statistical algorithm in essence, which responds slowly to link conditions and cannot adapt to the situation of rapid channel changes.

Method used

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  • Method for combined adjustment of adaptive rate and power of remote WiFi link
  • Method for combined adjustment of adaptive rate and power of remote WiFi link
  • Method for combined adjustment of adaptive rate and power of remote WiFi link

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Embodiment Construction

[0026] In order to achieve the above purpose, the present invention designs a technical scheme for joint adjustment of transmission rate and transmission power based on a simple time-slotted TDMA MAC protocol. The main idea is to first detect the functional relationship between the physical layer information of the received signal, the wireless network performance, and the energy consumption of the device, and then select the appropriate transmission rate and power.

[0027] The present invention selects received signal strength (RSSI) as the physical layer information amount for reference. RSSI is a quantity that characterizes the signal strength, which indicates the signal strength received by the antenna when a frame is received. RSSI can be directly obtained from the network card driver, and can better reflect the link status, so it can be used as the basis for rate adjustment.

[0028] In the first step, the relationship between RSSI and network performance is detected ...

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Abstract

The invention relates to the technical field of wireless communication, and aims to provide a method which is used for adjusting the sending rate and the sending power of remote TDMA wireless transmission to ensure that the sending rate and the sending power can quickly give response to link quality changes, thereby effectively improving the link throughput rate and reducing equipment power consumption as much as possible. The order to achieve the aim, the technical scheme of the invention is that: a method for combined adjustment of the adaptive rate and the power of a remote WiFi link comprises the following steps of: detecting a functional relation between physical layer information of received signals and wireless network properties and equipment energy consumption first; and then selecting proper sending rate and power for the next time slot according to the physical layer information of a frame received by the last time slot. The method is mainly applied to wireless communication and wireless networks.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an adaptive rate and power adjustment method of a long-distance WiFi link. Background technique [0002] In recent years, with the rapid development and increasing popularity of network technology, the demand for Internet access in remote rural areas has become more and more urgent. These areas have vast territories and relatively sparse population distribution, and their network topology often consists of long-distance links of several kilometers or even dozens of kilometers. WiFi-based long-distance (WiLD) mesh network is a long-distance wireless transmission technology, which only requires 802.11 finished wireless equipment and directional antennas, and has the characteristics of low cost and simple layout. But there are still many problems in the actual application of WiLD network. The signal of a long-distance WiFi link is affected by path loss, multipath fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04L1/16H04W52/24H04L1/00
CPCY02B60/50Y02D30/70
Inventor 赵增华窦志斌金泉张连芳舒炎泰
Owner TIANJIN UNIV
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