CN110784907A - Method for wireless gateway multi-frequency point coverage calling wireless network node and storage medium - Google Patents

Method for wireless gateway multi-frequency point coverage calling wireless network node and storage medium Download PDF

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CN110784907A
CN110784907A CN201911099091.8A CN201911099091A CN110784907A CN 110784907 A CN110784907 A CN 110784907A CN 201911099091 A CN201911099091 A CN 201911099091A CN 110784907 A CN110784907 A CN 110784907A
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frequency point
period
wireless
network node
frequency
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CN110784907B (en
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陈方华
李毅
刘强
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Chongqing Smart Water Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

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Abstract

The invention discloses a method for a wireless gateway to call a wireless network node by multi-frequency point coverage and a storage medium, comprising the following steps: the wireless gateway works periodically in the whole calling period, the time length of one multi-frequency point polling calling period is t, each multi-frequency point polling calling period consists of I fixed sequence frequency point working periods, and the time length of each frequency point working period is t i，i=1，2，3……I，t iIncluding preamble time t i1Data frame time t i2And sleep period time t i3(ii) a m is the number of covering calls; the detection period duration of a multi-frequency point polling signal of a wireless network node is T, each detection period of the multi-frequency point polling signal is composed of sleep periods of J different frequency points, and the sleep period duration of each frequency point is T jJ =1, 2, 3 … … J, and performs wireless signal detection with the inherent communication parameters after waking up. The invention reduces the influence of environmental interference on the systemThe call success rate is increased.

Description

Method for wireless gateway multi-frequency point coverage calling wireless network node and storage medium
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a method for calling a wireless network node by a wireless gateway through multi-frequency point coverage and a storage medium.
Background
With the development of wireless technology, wireless communication is widely used. However, the allocated frequency is limited, which causes that in practical applications, wireless communication devices of different enterprises may work on the same frequency and interfere with each other, thereby seriously affecting the success rate of system communication. In order to solve the problem that the communication is influenced by the interference caused by sharing a certain frequency, a part of enterprises introduce a multi-frequency parallel communication method, so that the success rate of the whole communication system can be ensured as long as one of all working frequencies has no interference even if some frequencies have conflicts and interference. However, this approach of introducing multiple frequencies brings great challenges in the networking process: the wireless gateway and the wireless network node must be on the same frequency for a certain period of time to realize networking.
Therefore, there is a need to develop a new method and storage medium for a wireless gateway to call a wireless network node through multi-frequency coverage.
Disclosure of Invention
The invention provides a method for multi-frequency point coverage calling of wireless network nodes by a wireless gateway and a storage medium, which can reduce the influence of environmental interference on a system and increase the success rate of calling.
The method for the wireless gateway to call the wireless network node by the multi-frequency point coverage comprises the following steps:
(1) the working mode of the wireless gateway is as follows:
the wireless gateway works periodically in the whole calling period, the duration of one multi-frequency point polling calling period is t, each multi-frequency point polling calling period consists of I fixed sequence frequency point working periods, different frequency points work alternately in sequence, the working sequence of the I different frequency points is fixed, and the duration of each frequency point working period is t iI is 1, 2, 3 … … I, t iThe period contains a preamble time t i1Data frame time t i2And sleep period time t i3I.e. t i＝t i1+t i2+t i3(ii) a m is the number of covering calls, and the initial value of m is 0; the specific working steps are as follows:
step 1, the wireless gateway continuously works for n times of multi-frequency polling call according to a t period;
step 2.m is m +1, and the number m of covering calls and the delay time t are judged dWhether the product of (a) is greater than or equal to t;
step 3, if yes, the whole calling process is finished; otherwise delay time t dAnd returning to the step 1;
(2) the wireless network node works in the following modes:
the length of a detection period of a multi-frequency point polling signal of a wireless network node is T, the detection period of the multi-frequency point polling signal of each time is composed of sleep periods of J different frequency points, the different frequency points work alternately in sequence, the working sequence of the J different frequency points of the same wireless network node is fixed, and the length of the sleep period of each frequency point is T jJ is 1, 2, 3 … … J, after waking up, using the inherent communication parameter to detect the wireless signal, if detecting the wireless signal frame, receiving the wireless signal frame and performing the corresponding operation according to the data frame requirement; otherwise, entering the next sleep cycle.
J different frequency points of the wireless network node are all in I different frequency points called by the wireless gateway.
Further, the delay time t dLess than the lead code time t of the calling signal of each frequency point of the wireless network section i1Minimum value of (1).
Further, n is:
Figure BDA0002269272860000021
further, m is:
Figure BDA0002269272860000022
a storage medium according to the present invention stores therein a computer program that is invoked by a processing module to perform the steps of the method of a wireless gateway multi-frequency-point overlay call to a wireless network node according to the present invention.
The invention has the following advantages:
(1) the wireless gateway can enable all wireless network nodes with the same frequency point wireless signal detection interval cycle time less than or equal to the time T within the range covered by the wireless gateway to be successfully called within a short time, so that the wireless nodes are operated to execute corresponding actions.
(2) The multi-frequency point covering calling mode not only contains all the advantages of single-frequency point covering calling (such as low power consumption), but also increases the success rate of covering calling, certain frequency points can not be successfully called after being interfered, and calling can be realized through other frequency points. Meanwhile, the power consumption of the wireless network node is not increased, and the method has great promotion effects on large-scale popularization of low-power-consumption wireless equipment and improvement of wireless network communication stability.
(3) The invention provides a multi-frequency lead code covering calling method by combining the mode that a wireless gateway calls a wireless network node in a short-time, intermittent, multi-frequency and single-frequency lead code covering manner; the wireless network nodes with long sleep period, asynchronous work and multi-frequency point wireless detection are actively called through the lead code covering calling of the wireless gateway with short time, intermittence, multi-frequency and multi-frequency points. The invention is suitable for a low-power consumption wireless networking communication system, a timing function system, a synchronous function system and the like which have higher communication requirements and work alternately at a plurality of frequency points.
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FIG. 1 is a model diagram of an embodiment;
fig. 2 is a flow chart of a wireless network node of an embodiment;
fig. 3 is a flow chart of a wireless gateway of an embodiment.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a model for implementing the overlay call mode of the present invention is established.
As shown in fig. 3, the wireless gateway operates:
the wireless gateway works periodically in the whole calling period, the duration of one multi-frequency point polling calling period is t, each multi-frequency point polling calling period consists of I fixed sequence frequency point working periods, different frequency points work alternately in sequence, and the working sequence of the I different frequency points is fixed, so that the working periods of the same frequency points are ensured to be the same. Each frequency point work period is longIs given by t i(I is 1, 2, 3 … … I), so t and t iThe relationship of (1) is:
Figure BDA0002269272860000031
the t is iThe period contains a preamble time t i1Data frame time t i2And sleep period time t i3I.e. t i＝t i1+t i2+t i3(ii) a m is the number of covering calls, and the initial value of m is 0; the specific working steps are as follows:
step 1, the wireless gateway continuously works for n times of multi-frequency polling call according to a t period;
step 2.m is m +1, and the number m of covering calls and the delay time t are judged dWhether the product of (a) is greater than or equal to t;
step 3, if yes, the whole calling process is finished; otherwise delay time t dAnd returns to step 1.
As shown in fig. 2, the wireless network node operates as follows:
the time length of a multi-frequency point polling signal detection period of a wireless network node is T, the multi-frequency point polling signal detection period of each time is composed of sleep periods of J different frequency points, the different frequency points work alternately in sequence, and the working sequence of the J different frequency points of the same wireless network node is fixed, so that T and T are constant jThe relationship of (1) is:
Figure BDA0002269272860000032
the duration of the sleep period of each frequency point is T j(J ═ 1, 2, 3 … … J). After waking up, the wireless signal detection is carried out by using the inherent communication parameters, and if the wireless signal frame is detected, the wireless signal frame is received and corresponding operation is carried out according to the data frame requirement; otherwise, entering the next sleep cycle.
In this embodiment, the following parameters need to be determined:
a. preamble time t i1Data frame time t i2And sleep period time t i3。t i1+t i2For the continuous transmission time of the wireless signals, the regulation of the national committee on the continuous transmission time limit of the wireless devices must be met;because of the wireless gateway call cycle time t i＝t i1+t i2+t i3Thus determining t i1、t i2And t i3Then the call cycle time t of the wireless gateway is determined i. The values of this embodiment are: t is t 11＝t 21＝t 31＝……＝t i1All take the value of t 1f；t 12＝t 22＝t 32＝……＝t i2All take the value of t 2f；t 13＝t 23＝t 33＝……＝t i3All take the value of t 3f(ii) a And t is 1f+t 2f+t 3fIs taken as t fThus: t is t 1＝t 2＝t 3＝……＝t I＝t f。
b. Delay time t dDelay time t dMust be smaller than the preamble t of each frequency point i1(I1, 2, 3 … … I) determining a preamble time t 1fPost-customization determination of delay time t dThe value of (c). The values of this embodiment are:
Figure BDA0002269272860000041
c. the number of different frequency point periods contained in each multifrequency polling calling period of the wireless gateway is I.
d. The number of different frequency point periods contained in each multi-frequency polling signal detection period of the wireless network node is J.
e. Sleep period T of wireless network node at different frequency points jThe value of this embodiment is: t is 1＝T 2＝T 3＝……＝T JAll take the value of T f。
f. The working frequency represented by J different frequency points included in each multi-frequency polling signal detection period of the wireless network node is required to be within the working frequency represented by I different frequency points included in the same frequency point sleep period of the wireless network node.
After the above parameters are determined, the following parameters are calculated:
a. wireless gateway multifrequency point at each timeThe polling call period t is calculated by the formula: t is I × t f。
b. The wireless network node detects the period T by the multi-frequency polling signal every time, and the calculation formula is as follows: t ═ J × T f。
c. The number n of the continuous working multi-frequency point polling call period included in one coverage call is an integer and is not less than the ratio of the detection period time T of the multi-frequency point polling signal of each time of the wireless network node to the detection period time T of the multi-frequency point polling call of each time of the wireless gateway, namely the calculation formula is as follows:
Figure BDA0002269272860000042
d. the number m of covering calls is an integer and is not less than the cycle time t and the delay time t of each multi-frequency polling call of the wireless gateway dThe ratio, i.e. the calculation formula, is:
Figure BDA0002269272860000043
in this embodiment, celi (·) represents rounding towards infinity.
In this embodiment, a storage medium stores therein a computer program, and the computer program is invoked by a processing module to execute the steps of the method for a wireless gateway to call a wireless network node through multi-frequency coverage as described in this embodiment.
The method can solve the problem that under the condition that a single frequency point is interfered by the environment to cause communication failure, the wireless network node which can successfully call other frequency points and awaken the signal within the signal scope of the wireless network node can be called successfully, and then the wireless network node can carry out corresponding operation. The method replaces the single frequency point working or sleeping period in the single frequency point covering calling mode with regular multi-frequency point period continuous working or sleeping, and the working or sleeping periods at the same frequency point interval are ensured to be the same. The key point is that the lead code coverage of the same frequency point of the wireless gateway is larger than the sleep period of the corresponding frequency point of the network node on the superposition of the time sequence. By the method, the influence of environmental interference on a system can be reduced and the call success rate can be increased on the basis of single-frequency point coverage call.

Claims (6)

1. A method for a wireless gateway to call a wireless network node in a multi-frequency coverage mode, comprising:
(1) the working mode of the wireless gateway is as follows:
the wireless gateway works periodically in the whole calling period, the duration of one multi-frequency point polling calling period is t, each multi-frequency point polling calling period consists of I fixed sequence frequency point working periods, different frequency points work alternately in sequence, the working sequence of the I different frequency points is fixed, and the duration of each frequency point working period is t iI is 1, 2, 3 … … I, t iThe period contains a preamble time t i1Data frame time t i2And sleep period time t i3I.e. t i＝t i1+t i2+t i3(ii) a m is the number of covering calls, and the initial value of m is 0; the specific working steps are as follows:
step 1, the wireless gateway continuously works for n times of multi-frequency polling call according to a t period;
step 2.m is m +1, and the number m of covering calls and the delay time t are judged dWhether the product of (a) is greater than or equal to t;
step 3, if yes, the whole calling process is finished; otherwise delay time t dAnd returning to the step 1;
(2) the wireless network node works in the following modes:
the length of a detection period of a multi-frequency point polling signal of a wireless network node is T, the detection period of the multi-frequency point polling signal of each time is composed of sleep periods of J different frequency points, the different frequency points work alternately in sequence, the working sequence of the J different frequency points of the same wireless network node is fixed, and the length of the sleep period of each frequency point is T jJ is 1, 2, 3 … … J, after waking up, using the inherent communication parameter to detect the wireless signal, if detecting the wireless signal frame, receiving the wireless signal frame and performing the corresponding operation according to the data frame requirement; otherwise, entering the next sleep cycle.
2. The method of claim 1, wherein the wireless gateway calls a wireless network node through multiple frequency coverage (multifrequency) comprises: j different frequency points of the wireless network node are all in I different frequency points called by the wireless gateway.
3. The method of a wireless gateway multi-frequency coverage call to a wireless network node of claim 1 or 2, wherein: the delay time t dLess than the lead code time t of the calling signal of each frequency point of the wireless network section i1Minimum value of (1).
4. The method of a wireless gateway multi-frequency-point overlay call to a wireless network node of claim 3, wherein: the n is:
5. the method of a wireless gateway multi-frequency-point overlay call radio network node according to claim 1, 2 or 4, wherein: the m is:
Figure FDA0002269272850000012
6. a storage medium having a computer program stored therein, characterized in that: the computer program is invoked by a processing module to perform the steps of the method of a wireless gateway multi-frequency-point-overlay-call radio network node of any of claims 1 to 5.
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