CN102143497A - Method for establishing communication data link - Google Patents
Method for establishing communication data link Download PDFInfo
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- CN102143497A CN102143497A CN2010106110384A CN201010611038A CN102143497A CN 102143497 A CN102143497 A CN 102143497A CN 2010106110384 A CN2010106110384 A CN 2010106110384A CN 201010611038 A CN201010611038 A CN 201010611038A CN 102143497 A CN102143497 A CN 102143497A
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Abstract
The invention provides a method for establishing a communication data link, which specifically comprises the following steps of: (1) respectively sorting out n primary frequencies and n slave frequencies from master nodes and slave nodes; (2) setting a default frequency f which is predictable by the master nodes and the slave nodes and presetting the default frequency f as a transmitting frequency of the master nodes and a receiving frequency of the slave nodes; (3) transmitting values of n primary frequencies sorted in the step (1) to the slave nodes by the master nodes; (4) selecting a primary f from the values of the n primary frequencies and setting the primary f as a transmitting frequency of the slave nodes and a receiving frequency of the master nodes; and (5) transmitting values of n slave frequencies sorted in the step (1) to the master nodes by the slave nodes so that the communication link is established. In the process of communication, the transmitting frequency of the master nodes and the receiving frequency of the slave nodes are selected from the n slave frequencies, while the transmitting frequency of the slave nodes and the receiving frequency of the master nodes are selected from the n primary frequencies, thereby the communication link is maintained.
Description
Technical field
The present invention relates to a kind of method of setting up universal data link, belong to a kind of communication protocol, this agreement is used for the data link of communication process and sets up process, and it is applicable to the dynamic spectrum communication system.
Background technology
The dynamic spectrum communication system requires communication system to have the characteristics of frequency agility, could pass through so constantly to adjust operating frequency to dereliction user's frequency band, thereby realization and main user shares the purpose of frequency spectrum.Frequency agility communication system present and that the dynamic spectrum communication system is the most approaching is a frequency-hopping communication system.Yet the frequency set that traditional frequency-hopping communication system adopts just determined before communication, and communication process medium frequency collection no longer changes, and realized frequency agility thereby choose operating frequency by pseudorandom in frequency set.The frequency agility that is to say frequency-hopping communication system is prompt change the on the frequency of some, has certain limitation.
In the dynamic spectrum communication system, for the receive frequency of realizing communicating pair constantly changes, need communicating pair constantly to exchange the receive frequency of self, make the transmitting-receiving frequency coupling.Receive frequency just all upgraded once again every certain cycle.Mutual receive frequency is through real-time estimate, the frequency that background noise is lower, therefore on receive frequency receiving data frames to be subjected to the possibility that main user disturbs very little, data link can be in the maintenance connection status, user data information also can correctly transmit.Yet in the communication first of the foundation of data link, receive frequency presets, can not be according to reception environment real-time estimate, change.Therefore, under the dynamic spectrum communication system, fast, effectively setting up of data link seems particularly important.
Summary of the invention
Problem at above-mentioned prior art exists the present invention proposes a kind of method of setting up universal data link, is one two dynamic spectrum communication nodes are announced self receive frequency mutually, sets up the process of data link, specifically may further comprise the steps:
(1) selects n respectively from host node with from node
Main, n
FromIndividual frequency;
(2) frequency f that a host node is set and all predicts from node
In advance, and with this f
In advanceBe made as the tranmitting frequency of host node and from the receive frequency of node;
(3) host node n that the first step is selected
MainIndividual frequency values sends to from node;
(4) at n
MainSelect a f in the individual frequency values
Main, and with this f
MainBe made as from the tranmitting frequency of node and the receive frequency of host node;
(5) from node with the n the first step
FromIndividual frequency values sends to host node, finish communication link and set up, in the communication process, the tranmitting frequency of host node and from the receive frequency of node at n
FromSelect in the individual frequency, from the receive frequency of the tranmitting frequency of node and host node at n
MainSelect in the individual frequency, to keep communication link.
Described step (1) is from host node and the n that selects respectively from node
Main, n
FromThe frequency that the background noise that individual frequency is elected for the frequency scanning system is lower is to guarantee communication efficiency.
Frequency f in the described step (2)
In advanceFrom precognition frequency set F
In advanceThe middle selection, precognition frequency set F
In advanceBe host node and the n that all predicts from node
In advanceIndividual frequency.
When certain frequency f of selecting
In advanceExist main user to disturb, cause setting up the communication link failure after, again at precognition frequency set F
In advance1 f of middle selection
In advanceCarry out link re-establishment.
The present invention also proposes a kind of method of setting up universal data link, mainly may further comprise the steps:
(1) selects n respectively from host node with from node
Main, n
FromIndividual frequency;
(2) frequency f that a host node is set and all predicts from node
In advance, and with this f
In advanceBe made as the tranmitting frequency of host node and from the receive frequency of node;
(3) host node is at the n of the first step
MainSelect a receive frequency f in the individual frequency
Main 1, and with this receive frequency f
Main 1Value send to from node this receive frequency f
Main 1Then as tranmitting frequency from node;
(4) from node with the n the described first step
FromIn the individual frequency, select a receive frequency f
From 1, and with this receive frequency f
From 1Value send to host node, this receive frequency f
From 1In tranmitting frequency as host node;
(5) host node will be except that f
Main 1Remaining (n
Main-1) individual frequency values sends to from node, and receiving from node should (n
Main-1) individual frequency values is finished communication link and is set up, in the follow-up communication process, the tranmitting frequency of host node and from the receive frequency of node at n
FromSelect in the individual frequency, from the receive frequency of the tranmitting frequency of node and host node at n
MainSelect in the individual frequency.
The method that the fast data-link that utilizes the present invention to propose is set up, the communication system of setting up not only has the characteristic of frequency agility, its communication frequency collection that adopts can upgrade at any time simultaneously, in conjunction with the main user's monitoring system in the dynamic spectrum communication system, can avoid main user immediately.
Embodiment
With two nodes: host node, be example, describe the implementation process of setting up universal data link that the present invention proposes in detail from node.
Main and subordinate node on whole communications band, repeatedly scans dynamic spectrum, to the position short-term forecast that frequency spectrum cavity-pocket will occur, finds out the probability of occurrence maximum according to scanning result, and the n master that noise level is minimum, n are from individual frequency.In n master's frequency of host node with its selection, the positional information of 1 frequency f master in frequency spectrum that noise level is minimum is encapsulated in the link setup frame α, the link setup frame is taked approach of error correction such as enough strong error correction coding, equilibrium, diversity reception, improves the correct probability of acceptance of link setup frame.Owing to there is a large amount of error correction redundant information, its code efficiency is lower.From node, with its n that detects in the positional information of individual frequency frequency spectrum is encapsulated in duties frame β.From node, initializing pseudo random sequence, to choose a frequency f pre-for pseudorandom from reserve frequency collection F is pre-, as receive frequency, waits for the link setup frame of reception host node.Host node, initializing pseudo random sequence and adopts identical method from node, and it is pre-to choose a frequency f in reserve frequency collection F is pre-, as tranmitting frequency.Since host node with adopt identical pseudo random sequence from node, therefore can guarantee that the frequency of electing is identical, and have randomness.Host node emission link setup frame α.The receive frequency of host node is set to the frequency values in the link setup frame α then.From node, receive link setup frame α, demodulate the frequency location information that comprises in the frame.From node with f master as tranmitting frequency, launch service frame β.A frequency f is a receive frequency from 1 in the pseudorandom then selection duties frame β.Host node receives duties frame β, demodulates the frequency location information from node that comprises in the frame.Host node is encapsulated in detect n the positional information of cavity in frequency spectrum in the duties frame γ, and in the duties frame β that receives, pseudorandom is chosen a frequency f from 1 as tranmitting frequency, and γ sends with the duties frame.From node, receive duties frame γ, demodulate the frequency location information of the host node that comprises in the frame.So far, the link setup process finishes, and main and subordinate node is finished receive frequency reciprocal process.
The method that the present invention proposes is mainly used in the dynamic spectrum communication system, and in the dynamic spectrum communication system, the operating frequency that requires to use in the communication process constantly changes, adopt patent of the present invention after, can realize this requirement.
Suppose that the working signal bandwidth is 3kHz, the operating frequency range of communication node is 2-30MHz.One of two communication node are set to host node, and one is set to from node.Host node and utilize the spectrum scan card respectively the frequency spectrum of on-site 2-30MHz separately to be scanned from node at first obtains FFT value on each Frequency point by scanning, and finding out bandwidth is 10 frequencies of FFT value minimum in 3kHz and the 3kHz.Suppose that these 10 frequencies that main website searches are F
Main 1-10, 10 frequencies that slave station searches are F
From 1-10There is a reserve frequency collection F first between main website and the slave station
Pre-1-100Main website and slave station utilize current time t, and the classical pseudo-random function rand (t) of employing calculates the several x between the 1-100.Because what adopt is identical input and identical pseudo-random function, so the x value that master-salve station calculates is identical.The tranmitting frequency of main website self is set to F
Pre-x, the receive frequency of slave station self is set to F
Pre-xAfter master-salve station set transmitting-receiving frequency, main website utilized rand (t) to calculate several y between the 1-10 once more, and main website is with F
Main yThis frequency values passes to slave station.Slave station receives F
Main yAfter, the tranmitting frequency of self is set to F
Main y, simultaneously main website also self receive frequency be set to F
Main yAfter master-salve station set transmitting-receiving frequency, slave station was with F
From 1-10These 10 frequency values pass to main website.Master-salve station utilizes rand (t) to calculate several z between the 1-10 once more, and the tranmitting frequency of main website self is set to F
From z, the receive frequency of slave station self is set to F
From zAfter setting the transmitting-receiving frequency of master-salve station, main website is with F
Main 1-10In remove F
Main yOutside 9 frequency values pass to slave station.So far, the communication link of main and subordinate node is set up the process end.This moment, the tranmitting frequency collection of host node was F
From 1-10, the receive frequency collection of host node is F
Main 1-10, be F from the tranmitting frequency collection of node
Main 1-10, be F from the receive frequency collection of node
From 1-10The operating frequency that adopts when transmitting data between the main and subordinate node is concentrated from transmitting-receiving frequency and is chosen.Utilize rand (t) function can realize that transmitting-receiving frequency is consistent.
Claims (5)
1. method of setting up universal data link mainly may further comprise the steps:
(1) selects n respectively from host node with from node
Main, n
FromIndividual frequency;
(2) frequency f that a host node is set and all predicts from node
In advance, and with this f
In advanceBe made as the tranmitting frequency of host node and from the receive frequency of node;
(3) host node n that the first step is selected
MainIndividual frequency values sends to from node;
(4) at n
MainSelect a f in the individual frequency values
Main, and with this f
MainBe made as from the tranmitting frequency of node and the receive frequency of host node;
(5) from node with the n the first step
FromIndividual frequency values sends to host node, finish communication link and set up, in the communication process, the tranmitting frequency of host node and from the receive frequency of node at n
FromSelect in the individual frequency, from the receive frequency of the tranmitting frequency of node and host node at n
MainSelect in the individual frequency, to keep communication link.
2. according to the method for setting up universal data link of claim 1, it is characterized in that the described first step is from host node and the n that selects respectively from node
Main, n
FromThe frequency that the background noise that individual frequency is elected for the frequency scanning system is lower is to guarantee communication efficiency.
3. according to the method for setting up universal data link of claim 1, it is characterized in that the frequency f in described second step
In advanceFrom precognition frequency set F
In advanceThe middle selection, precognition frequency set F
In advanceBe host node and the n that all predicts from node
In advanceIndividual frequency.
4. according to the method for setting up universal data link of claim 3, it is characterized in that when certain frequency f of selecting
In advanceHave main user, cause setting up communication link failure after, again at precognition frequency set F
In advance1 f of middle selection
In advanceCarry out link re-establishment.
5. method of setting up universal data link mainly may further comprise the steps:
(1) selects n respectively from host node with from node
Main, n
FromIndividual frequency;
(2) frequency f that a host node is set and all predicts from node
In advance, and with this f
In advanceBe made as the tranmitting frequency of host node and from the receive frequency of node;
(3) host node is at the n of the first step
MainSelect a receive frequency f in the individual frequency
Main 1, and with this receive frequency f
Main 1Value send to from node this receive frequency f
Main 1Then as tranmitting frequency from node;
(4) from node with the n the described first step
FromIn the individual frequency, select a receive frequency f
From 1, and with this receive frequency f
From 1Value send to host node, this receive frequency f
From 1In tranmitting frequency as host node;
(5) host node will be except that f
Main 1Remaining (n
Main-1) individual frequency values sends to from node, and receiving from node should (n
Main-1) individual frequency values is finished communication link and is set up, in the follow-up communication process, the tranmitting frequency of host node and from the receive frequency of node at n
FromSelect in the individual frequency, from the receive frequency of the tranmitting frequency of node and host node at n
MainSelect in the individual frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106110384A CN102143497A (en) | 2010-12-29 | 2010-12-29 | Method for establishing communication data link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106110384A CN102143497A (en) | 2010-12-29 | 2010-12-29 | Method for establishing communication data link |
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| CN2010106110384A Pending CN102143497A (en) | 2010-12-29 | 2010-12-29 | Method for establishing communication data link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015078035A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Method for self-learning of cross-frequency band power line communication frequency |
| CN106376056A (en) * | 2016-09-13 | 2017-02-01 | 广州海格通信集团股份有限公司 | Implementation method for shortwave-based fast link establishing system |
| CN106936467A (en) * | 2015-12-30 | 2017-07-07 | 中国船舶重工集团公司第七研究院 | A kind of method that narrow-band antenna emission system realizes fast frequency switching |
| CN110996375A (en) * | 2019-12-06 | 2020-04-10 | 中国电子科技集团公司第五十四研究所 | Self-adaptive frequency selection method for meteor trail communication |
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| CN1382349A (en) * | 1999-10-25 | 2002-11-27 | 摩托罗拉公司 | Method and apparatus for dyanmic spectrum allocation |
| WO2009020422A2 (en) * | 2007-08-08 | 2009-02-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Multicarrier communication system employing explicit frequency hopping |
| CN101478758A (en) * | 2008-12-26 | 2009-07-08 | 北京邮电大学 | Method and system for dynamic frequency spectrum distribution |
| CN101908942A (en) * | 2009-06-05 | 2010-12-08 | 华为技术有限公司 | Method for transmitting damage information, node and network system |
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2010
- 2010-12-29 CN CN2010106110384A patent/CN102143497A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382349A (en) * | 1999-10-25 | 2002-11-27 | 摩托罗拉公司 | Method and apparatus for dyanmic spectrum allocation |
| WO2009020422A2 (en) * | 2007-08-08 | 2009-02-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Multicarrier communication system employing explicit frequency hopping |
| CN101478758A (en) * | 2008-12-26 | 2009-07-08 | 北京邮电大学 | Method and system for dynamic frequency spectrum distribution |
| CN101908942A (en) * | 2009-06-05 | 2010-12-08 | 华为技术有限公司 | Method for transmitting damage information, node and network system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015078035A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Method for self-learning of cross-frequency band power line communication frequency |
| CN106936467A (en) * | 2015-12-30 | 2017-07-07 | 中国船舶重工集团公司第七研究院 | A kind of method that narrow-band antenna emission system realizes fast frequency switching |
| CN106936467B (en) * | 2015-12-30 | 2020-04-03 | 中国船舶重工集团公司第七研究院 | Method for realizing fast frequency conversion of narrow-band antenna transmitting system |
| CN106376056A (en) * | 2016-09-13 | 2017-02-01 | 广州海格通信集团股份有限公司 | Implementation method for shortwave-based fast link establishing system |
| CN106376056B (en) * | 2016-09-13 | 2020-02-14 | 广州海格通信集团股份有限公司 | Method for realizing short wave quick link establishment system |
| CN110996375A (en) * | 2019-12-06 | 2020-04-10 | 中国电子科技集团公司第五十四研究所 | Self-adaptive frequency selection method for meteor trail communication |
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Application publication date: 20110803 |