CN108366385B - Synchronous frequency hopping orthogonal networking method based on frequency point grouping - Google Patents
Synchronous frequency hopping orthogonal networking method based on frequency point grouping Download PDFInfo
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- CN108366385B CN108366385B CN201810121430.7A CN201810121430A CN108366385B CN 108366385 B CN108366385 B CN 108366385B CN 201810121430 A CN201810121430 A CN 201810121430A CN 108366385 B CN108366385 B CN 108366385B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
Abstract
The invention discloses a synchronous frequency hopping orthogonal networking method based on frequency point grouping, for a communication system comprising N sub-networks, each sub-network consists of a host and a slave, and the orthogonal networking method comprises the following steps: s1, numbering each subnet, wherein the number is 0-N-1; s2, distributing network time slots for the host and the slave of each sub-network by adopting a TDMA (time division multiple Access) super-frame structure, so that the host and the slave of each sub-network respectively and statically occupy different time slots, and the host and the slave are in f0～fK‑1Synchronously hopping frequency in the K frequency points; s3, in any communication time slot, dividing K frequency points into N groups with the number of Q0~QN‑1Each group containing K1And each frequency point is allocated with frequency hopping frequency points according to the subnet numbers, so that the frequency hopping patterns of N sets of equipment at the same time are orthogonal and do not interfere with each other. The invention can enable the frequency hopping patterns of all the subnets at the same time to be orthogonal based on the frequency point grouping, thereby enabling the frequency hopping frequencies of all the subnets not to collide at the same time and not causing mutual interference among the networks.
Description
Technical Field
The invention relates to networking communication, in particular to a synchronous frequency hopping orthogonal networking method based on frequency point grouping.
Background
Frequency hopping communication is the most widely and effectively applied technology in the short-wave communication anti-interference technology. By adopting the frequency hopping multiple access communication network, the interception resistance and the interference resistance of frequency hopping signals are greatly improved, and the safety of transmitted information can be well guaranteed. And because the frequency hopping multiple access communication network has the advantages of strong anti-interference capability, low interception probability, low detection probability and the like, the frequency hopping multiple access communication network has good inhibition effect on selective fading of frequency. When the networking is carried out by adopting the frequency hopping communication, all equipment groups with the same frequency hopping pattern are in the same network, the frequency hopping frequencies of all the equipment in the network are required to be not collided at the same time, otherwise, the mutual interference among the networks can be caused, and the communication data transmission among the equipment is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a synchronous frequency hopping orthogonal networking method based on frequency point grouping, which can enable the frequency hopping patterns of all subnets at the same time to be orthogonal based on the frequency point grouping, so that the frequency hopping frequencies of all subnets do not collide at the same time, and mutual interference among the subnets is not caused.
The purpose of the invention is realized by the following technical scheme: a synchronous frequency hopping orthogonal networking method based on frequency point grouping comprises that for a communication system comprising N sub-networks, each sub-network consists of a host and a slave, and the orthogonal networking method comprises the following steps:
s1, numbering each subnet, wherein the number is 0-N-1, and N is a positive integer not less than 2;
s2, distributing network time slots for the host and the slave of each sub-network by adopting a TDMA (time division multiple Access) super-frame structure, so that the host and the slave of each sub-network respectively and statically occupy different time slots, and in each time slot, the host and the slave are in f0～fK-1Synchronously hopping frequency in the K frequency points, wherein K is more than or equal to N;
s3, in any communication time slot, dividing K frequency points into N groups with the number of Q0~QN-1Each group containing K1And each frequency point is allocated with frequency hopping frequency points according to the subnet numbers, so that the frequency hopping patterns of N sets of equipment at the same time are orthogonal and do not interfere with each other.
The TDMA superframe structure includes a plurality of periodic time frames. Each of the periodic time frames includes a slot 0 and a slot 1:
in time slot 0, the host sends data, and the slave receives data;
in time slot 1, the slave transmits data and the master receives data.
Wherein, the step S3 includes the following substeps:
s301, in any communication time slot, dividing K frequency points into N groups with the number of Q0~QN-1Each group containing K1Individual frequency point, K1=[K/N]Wherein [ K/N]Expressing that K/N is rounded downwards, and distributing each group of frequency points to subnets with different numbers;
s302. for the master and slave of each sub-network, K is obtained from distribution1Among the frequency points of (1), K is selected2Is randomAvailable random frequency points distributed over the entire operating bandwidth, where K2≤K1；
S303, detecting the channel between the host and the slave in each sub-network, and according to the channel detection result, selecting the K corresponding to the sub-network2And dynamically and randomly selecting an undisturbed frequency point from the available random frequency points to serve as a frequency hopping frequency point of the subnet for data transmission.
The invention has the beneficial effects that: the invention can enable the frequency hopping patterns of all the subnets at the same time to be orthogonal based on the frequency point grouping, thereby enabling the frequency hopping frequencies of all the subnets not to collide at the same time and not causing mutual interference among the networks.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a diagram of a TDMA superframe structure according to the present invention;
FIG. 3 is a schematic diagram of a frequency-hopping bin generation process based on frequency grouping;
fig. 4 is a schematic diagram of frequency point allocation of different subnets in the embodiment.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, for a communication system including N subnets, each subnet is composed of a master and a slave, and a synchronous frequency hopping orthogonal networking method based on frequency point grouping includes:
s1, numbering each subnet, wherein the number is 0-N-1, and N is a positive integer not less than 2;
s2, distributing network time slots for the host and the slave of each sub-network by adopting a TDMA (time division multiple Access) super-frame structure, so that the host and the slave of each sub-network respectively and statically occupy different time slots, and in each time slot, the host and the slave are in f0～fK-1Synchronously hopping frequency in the K frequency points, wherein K is more than or equal to N;
s3, in any communication time slot, dividing K frequency points into N groups with the number of Q0~QN-1Each group containing K1And each frequency point is allocated with frequency hopping frequency points according to the subnet numbers, so that the frequency hopping patterns of N sets of equipment at the same time are orthogonal and do not interfere with each other.
As shown in fig. 2, the TDMA superframe structure includes a plurality of periodic time frames. Each of the periodic time frames includes a slot 0 and a slot 1:
in time slot 0, the host sends data, and the slave receives data;
in time slot 1, the slave transmits data and the master receives data.
As shown in fig. 3, the step S3 includes the following sub-steps:
s301, in any communication time slot, dividing K frequency points into N groups with the number of Q0~QN-1Each group containing K1Individual frequency point, K1=[K/N]Wherein [ K/N]Expressing that K/N is rounded downwards, and distributing each group of frequency points to subnets with different numbers;
in the embodiment of the present application, when K fixed frequency points are divided into N groups, the frequency points included in each group need to be dispersed in the whole operating frequency range to combat narrowband and wideband interference, for example, when N =8 (total 8 subnets), K =64 (total 64 frequency points, f)0～f63) In the process, the frequency points of different subnets are distributed as shown in fig. 4, and it can be seen that the frequency points are divided into 8 groups, each group includes 8 frequency points (F1-F8), and the frequency points included in each group are dispersed in the whole working frequency range, and each group of frequency points corresponds to subnets with different numbers.
S302. for the master and slave of each sub-network, K is obtained from distribution1Among the frequency points of (1), K is selected2Available random frequency points randomly distributed in the whole working bandwidth, wherein K2≤K1；
S303, detecting the channel between the host and the slave in each sub-network, and according to the channel detection result, selecting the K corresponding to the sub-network2And dynamically and randomly selecting an undisturbed frequency point from the available random frequency points to serve as a frequency hopping frequency point of the subnet for data transmission.
Because the numbers of the sub-networks correspond to different frequency point groups, the situation of frequency hopping frequency collision can not occur when the sub-networks (a host and a slave in the sub-networks) communicate at the same time; in summary, the frequency hopping patterns of the subnets at the same time can be orthogonal based on the frequency point grouping, so that the frequency hopping frequencies of the subnets do not collide at the same time, and mutual interference among the networks is avoided.
Claims (3)
1. A synchronous frequency hopping orthogonal networking method based on frequency point grouping is characterized in that: for a communication system comprising N subnets, each subnet is composed of a master and a slave, the orthogonal networking method comprises the following steps:
s1, numbering each subnet, wherein the number is 0-N-1, and N is a positive integer not less than 2;
s2, distributing network time slots for the host and the slave of each sub-network by adopting a TDMA (time division multiple Access) super-frame structure, so that the host and the slave of each sub-network respectively and statically occupy different time slots, and in each time slot, the host and the slave are in f0～fK-1Synchronously hopping frequency in the K frequency points, wherein K is more than or equal to N;
s3, in any communication time slot, dividing K frequency points into N groups with the number of Q0～QN-1Each group containing K1Frequency hopping frequency point distribution is carried out according to subnet numbers, so that frequency hopping patterns of N sets of equipment at the same time are orthogonal and do not interfere with each other;
the step S3 includes the following sub-steps:
s301, in any communication time slot, dividing K frequency points into N groups with the number of Q0～QN-1Each group containing K1Individual frequency point, K1＝[K/N]Wherein [ K/N]Expressing that K/N is rounded downwards, and distributing each group of frequency points to subnets with different numbers;
s302. for the master and slave of each sub-network, K is obtained from distribution1Among the frequency points of (1), K is selected2Available random frequency points randomly distributed in the whole working bandwidth, wherein K2≤K1；
S303, aiming at the channel between the host and the slave in each sub-networkDetecting, and according to the channel detection result, selecting the K corresponding to the subnet2And dynamically and randomly selecting an undisturbed frequency point from the available random frequency points to serve as a frequency hopping frequency point of the subnet for data transmission.
2. The method according to claim 1, wherein the method comprises the following steps: the TDMA superframe structure includes a plurality of periodic time frames.
3. The method according to claim 2, wherein the method comprises the following steps: each of the periodic time frames includes a slot 0 and a slot 1:
in time slot 0, the host sends data, and the slave receives data;
in time slot 1, the slave transmits data and the master receives data.
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| CN113098562B (en) * | 2021-04-08 | 2022-03-29 | 北京中天星控科技开发有限公司 | Method for generating broadband point interval frequency hopping sequence of synchronous networking radio station |
| CN115118306B (en) * | 2022-06-27 | 2023-06-16 | 深圳友讯达科技股份有限公司 | Power Internet of things frequency hopping sequence pattern generation method and power Internet of things equipment |
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| US10356777B2 (en) * | 2016-04-13 | 2019-07-16 | Qualcomm Incorporated | Frequency hopping in OFDMA wireless networks |
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