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Sleep wake-up method of a wireless meter reading system

A wireless meter reading and sleep technology, applied in wireless communication, advanced technology, power management, etc., can solve the problems of large delay and high power consumption, and achieve the effect of reducing power consumption and simple hardware design structure

Active Publication Date: 2017-11-17
苏州博联科技有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of this invention is to propose a sleep wake-up method for a wireless meter reading system. According to whether the upper computer is working, use a broadcast wake-up packet or point-to-point multiple times to send detection packets The method wakes up the node, cancels the use of the long leading packet in the traditional asynchronous sleep mechanism, and solves the problem of large delay and high power consumption

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  • Sleep wake-up method of a wireless meter reading system
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  • Sleep wake-up method of a wireless meter reading system

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Embodiment

[0024] In the present invention, when the upper computer works, each node in the network maintains a fixed sleep cycle as T idle and a duty cycle for T on , assuming a sleep cycle T idle for duty cycle T on n times, so setting the number of broadcasts of sleep wake-up packets to n+1 can ensure that all nodes in the network are woken up. When the node receives the wake-up packet for the first time, it forwards the packet n+1 times according to the broadcast mode of the coordinator, and then discards it directly after receiving the wake-up packet without processing it.

[0025] For the convenience of description, an example is given to illustrate the situation when n=3, such as figure 1 Shown is a schematic diagram of the wake-up packet transmission, assuming that the time when the coordinator sends the first sleep wake-up broadcast packet is T 1 , the time T of the second broadcast packet 2 for T 1 +T on +t 0 (t 0 The size tends to 0, about 300us), the time T of the th...

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Abstract

The invention discloses a sleep wakeup method of a wireless meter reading system. If an upper computer is in working state, a coordinator broadcasts a wakeup packet to wake up all nodes in the network, the node can modify self state into the continuous working state after being waken up; if the upper computer is in idle state, a sender repeatedly sends a detection packet to a receiver to wake up the nodes, and the nodes are always in the sleep wakeup state at this moment; the nodes are waken up by broadcasting the wakeup packet or repeatedly sending the detection packet point-to-point according to the condition whether the upper computer is in working state; and therefore, the different wakeup methods can be adopted according to the different working states of the upper computer without using a precursor packet with large use length; since the hardware design has simple structure, the power consumption can be effectively reduced.

Description

technical field [0001] The invention relates to a wireless sensor network node and a MAC layer protocol, and belongs to the technical field of wireless sensor networks, in particular to a periodic sleep wake-up method for nodes in the MAC layer protocol of a wireless meter reading system. Background technique [0002] The traditional manual meter reading method has many disadvantages, such as high labor intensity, low efficiency, high management cost, and reading errors. With the emergence and development of wireless sensor networks, the application of wireless sensor network technology to meter reading systems has achieved Extensive research and application, the use of wireless meter reading can effectively solve the disadvantages of manual meter reading. [0003] In the application of the wireless meter reading system, the nodes are large in scale and powered by batteries. In order to prolong the service life of the nodes, the nodes cannot be in the working state all the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/02H04W84/18
CPCY02D30/70
Inventor 周晓明王薇归成希张燕朱琰
Owner 苏州博联科技有限公司
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