CN106160788A - A kind of networking implementation method of Fast synchronization frequency hopping radio set - Google Patents
A kind of networking implementation method of Fast synchronization frequency hopping radio set Download PDFInfo
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Abstract
The present invention relates to the implementation method of a kind of networking of frequency-hopping radio station based on TDMA technology (tdma), the method uses star structure to set up synchronized orthogonal net, use principal and subordinate's frequency-hopping synchronization mode that synchronous head method, independent channel method combine, synchronizing process is by the fast frequency-hopped scanning of main frame, each tracking from machine frequency hopping at a slow speed is set up, and synchronization sets up front main frame from machine according to respective rule saltus step；Synchronizing process and communication process use different frequency hopping patterns；System uses the communication of time division multiple access way time-division slot, possesses and networks late and dynamic distribution time slot function.Compared to determining frequency synchronization or single using synchronous head method, the synchronous network system of independent channel method to have more preferable antijamming capability, Anti TBIgG ability and higher networking security, also there is higher slot efficiency and communication efficiency simultaneously.
Description
Technical field
The present invention relates to the implementation method of a kind of Fast synchronization networking of frequency-hopping radio station, belong to wireless communication field.Utilize networking of frequency-hopping radio station to carry out the transmission of information, the requirement to multi-point in actual application can be met, the simultaneously effective reliability ensureing communication and security, improve the antijamming capability of communication.
Background technology
Frequency hopping communications refers to that the carrier frequency of receiving-transmitting sides carries out the communication mode of random jump in certain frequency band range according to predetermined rule.Compared to traditional frequency fixing communication, frequency hopping communications has stronger antijamming capability.Simultaneously frequency hopping so that its frequency efficiency is high, networking is convenient, be easy to multiple access communication and compatibility is good etc. that feature is widely used in military or civilian field.
In order to realize point-to-point frequency hopping communications between multiple terminals during meeting modern communications, needing to be managed collectively terminal, the rule according to making an appointment is in communication with each other, and optimizes channel resource, improves communication efficiency.For frequency hopping communications owing to its frequency that communicates constantly converts with frequency hopping pattern, therefore can be according to frequency hopping pattern extended network.The synchronized orthogonal network that current frequency hopping combines with TDMA tdma is big with its networking quantity, disturb the advantages such as little, anti-investigation extensively to be applied between net.
The current modes that much frequency hopping radio sets based on TDMA technology use the single frequencies of independent channel to set up synchronization, although but synchronizing to set up process and be easily disturbed rapidly, networking process is relatively easy, after part terminal is disturbed, cannot dynamically regulate time slot, cause the wasting of resources, reduce communication efficiency.The present invention provides a kind of Fast synchronization networking of frequency-hopping radio station method based on TDMA tdma.The method sets up time reference by Centroid, completes networking synchronization；Synchronizing process use fast jump scan the slow mode jumped and follow the tracks of, simultaneously by the process to the dynamic distribution and slow networking radio station netting interior radio station time slot, the method can improve the antijamming capability of synchronizing process and the communication efficiency of frequency hopping network and stability than above-mentioned synchronized orthogonal network technique.
Content of the invention
It is an object of the invention to, the networking implementation method of a kind of Fast synchronization frequency hopping radio set is provided, time-division slot point-to-multipoint delivery between many radio station can be realized, it is achieved the dynamic distribution of radio station time slot and slow networking process.There is the features such as synchronism stability, communication efficiency is high, antijamming capability is strong, Anti TBIgG ability is strong.
The present invention is to use techniques below means to realize:
A kind of networking implementation method of Fast synchronization frequency hopping radio set, its networking mode is as follows:
The synchronizing process of 1.1 networks, with the fast frequency-hopped scanning of main frame, sets up handshake communication from the mode that machine frequency hopping at a slow speed is followed the tracks of, and slave uses one group of frequency hopping pattern being specifically designed to synchronization；Setting up the communication process after synchronization then uses another set to have the frequency hopping pattern of good autocorrelation, cross correlation；
In 1.2 synchronizing processes, main frame is according to the feedback information from machine receiving, and in dynamic monitoring network, radio station quantity, distributes in real time to communication time slot, removes unnecessary time slot；From machine according to the time slot being assigned to, sending data at respective time slot, whole network keeps strict slot synchronization, and carries out proper communication；
The scanning information that frequency hopping at a slow speed follows the tracks of main frame, the whole network of main frame regulation and control are circulated in 1.3 radio station networking late, send slow networking scanning information at regular intervals, weed out net radio station, add the application radio station that networks late, redistribute time slot, hoc communication network；
In abovementioned steps, the 1.1st, the synchronization establishment step of 1.2 is as follows:
Quickly scanning according to synchronising frequency hopping pattern after 2.1 main frame starts, sending identical channel synchronization information at each frequency, synchronizing information comprises feedback slot information；Carry out slow scanning tracking according to the frequency hopping pattern identical with main frame after machine start, the synchronizing information of resident set time Receiving Host on each frequency；
If 2.2 receive, from machine, the channel synchronization head frame that main frame sends, then waiting feedback slot to send feedback acknowledgment frame when arriving, each is different according to the numbering feedback slot of oneself from machine；If being not received by, from machine, the channel synchronization head frame that main frame sends, then continue slow jump from machine and follow the tracks of；Main frame has cycled through synchronizing information and has entered reception state, receives the feedback acknowledgment frame respectively sending from machine；
If 2.3 main frames receive each from the feedback acknowledgment frame of machine, then main frame sets up a slave list according to the feedback information receiving, from machine quantity and from plane No. in record net；Main frame then enter input time slot distribution state, to net in from machine sending time slots distribute frame；Enter reception state after machine has sent feedback acknowledgment frame, the time slot distribution frame of Receiving Host；If main frame is not received by any feedback acknowledgment frame from machine, then return the process after the slave start of 2.1；
2.4 main frames enter reception state after having sent time slot distribution frame, receive each from the time slot acknowledgement frame of machine；Enter transmission state after machine receives time slot distribution frame, by the time slot sending time slots acknowledgement frame of distribution；If main frame does not receive all time slot acknowledgement frames from machine, then return the process of 2.3；Without receiving any time slot acknowledgement frame from machine, then return the process of 2.1；
If 2.5 main frames receive all net in from the time slot acknowledgement frame of machine, then networking synchronize successfully, entrance transmission state；Main frame sends communication acknowledgement frame, enters reception state after machine receives communication acknowledgement frame；Whole network starts time-division slot communication, and each radio station sends data at respective time slot, receives data at non-native time slot；
In abovementioned steps, with falling to net radio station, slow networking radio station is applied for that processing procedure is as follows by 1.3:
If 3.1 network when detecting timer late to the count maximum that M(M is slow networking timer), then the process of 2.1, the synchronizing information of slow networking radio station Receiving Host is returned by 2.5, network re-establishes, and adds slow networking radio station, weeds out net radio station；
After 3.2 frequency hopping radio set networks enter communications status, fall net detection timer and the detection timer that networks late starts timing；If when falling to net detection timer to N(N being the count maximum falling net detection timer), then returned the process of 2.4 by 2.5, again received the time slot acknowledgement frame from machine by main frame；
Described in abovementioned steps 3.2 falling net detection timer for fall to net radio station detection time interval count, when net in slave cycled through a secondary data after timer add 1；
In abovementioned steps, the 3.1st, the detection timer that networks late described in 3.2 is for counting to slow networking radio station detection time interval, and after in net, slave has cycled through a secondary data, timer adds 1.
The networking implementation method of the present invention a kind of Fast synchronization frequency hopping radio set, has the advantage that
1. hopped-frequency pulses synchronizing process uses the fast mode jumping synchronous scanning and slow jump synchronized tracking, realizes in conjunction with independent channel method, synchronous head method and accurate clock method, and the networking stability of synchronization is good, step-out rate is low, the Anti TBIgG ability of synchronizing process is strong.
2. hopped-frequency pulses system is based on tdma, it is achieved the accurate time-division slot frequency hopping communications in radio station in net.Radio station time slot can be entered Mobile state distribution, the dynamic networking application processing slow networking radio station by networking Centroid.Networking slot efficiency height, communication efficiency height, strong interference immunity, Anti TBIgG ability are strong.
Brief description
Fig. 1 is that network-building method realizes procedure chart；
Fig. 2 jumps tracking procedure chart for fast jump scanning with slow；
Fig. 3 is main frame communication flow diagram；
Fig. 4 is for from machine communication flow diagram；
Fig. 5 is networking time slot distribution diagram；
Detailed description of the invention
It is described further below in conjunction with the enforcement to the present invention for the Figure of description:
First specifying in network-building method that a terminal is main frame, as Centroid, being used for sending synchronizing information, time slot allocation information etc. to set up Network Synchronization, other-end is for from machine.
Fig. 1 be network-building method realize procedure chart, 1. process uses fast frequency-hopped scan mode, uses the frequency hopping pattern of synchronizing process；1. 2. process uses synchronous head method, by reaching the synchronization between radio station to the transmitting-receiving of synchronous head frame；2. 3. 4. 5. process use fixed channel method, all radio station are all at agreed upon channel transceiving data；3. 4. radio station time slot is entered Mobile state distribution by process；6. 7. 8. process networking radio station time-division slot communication, uses another set for the frequency hopping pattern of communication process.
Fig. 2 is to set up main frame in synchronizing process to jump scanning soon and jump the procedure chart of tracking from machine slowly.When using synchronous network mode, in net, terminal sets up synchronization is one of network-building method core realizing process.As in figure 2 it is shown, in synchronizing process as a example by the frequency hopping pattern using 8 frequencies.The frequency error factor cycle of main frame is T, and main frame sends identical synchronizing information frame in each cycle T, is a circulation with 8T, sends 8 circulations, be 64T altogether.It is feedback slot after main frame scanning sending time slots, as shown in Figure 2, if there being n then to arrange n individual from machine feedback slot from machine, for main frame reception from machine feedback acknowledgment frame.Being 8 times of the mian engine changeover frequency cycle from the frequency error factor cycle of machine is 8T, the synchronizing information frame of Receiving Host；If receive the synchronizing information frame of main frame from machine, then send feedback acknowledgment frame according to the information in synchronizing information frame at feedback slot, respectively send feedback acknowledgment frame at feedback slot from machine successively according to the machine ID.If main frame does not receive any feedback acknowledgment frame from machine, then return fast scanning mode of jumping, repetition above procedure, until networking of frequency-hopping radio station synchronization is set up.Above procedure combines synchronous head method, independent channel method.
Fig. 3 and Fig. 4 describes the interior main frame of net and the synchronization foundation from machine and communication process respectively in detail, as described in abovementioned steps 2.1 ~ 2.5 and 3.1 ~ 3.2.Include during networking that scanning jumped soon by main frame, the frequency hopping of jumping tracking from machine slowly sets up synchronizing process；Main frame is according to the process of the on-demand dynamic distribution time slot of feedback information；Radio station quantity in periodic monitor net, and slow networking process, radio station fall the process that net is processed；In net, radio station is according to the process of the frequency hopping pattern time-division slot frequency hopping communications for communication process.
Main frame enters fast jump scanning mode after powering on, slow jump tracking mode is entered after machine powers on, slave sets up synchronization according to step frequency hopping described in Fig. 2, then main frame is according to from the feedback information of machine, establishment slave list, record feedback from dynamo-electric number of units amount and radio station ID, formulate time slot allocative decision, then sending time slots distribution frame.If main frame is not received by any feedback acknowledgment information from machine, then main frame returns fast jump scanning mode.Receive time slot distribution frame from machine, extract the gap information mating with the machine, then according to sequentially at the machine time slot to main frame sending time slots acknowledgement frame.Enter reception state immediately after machine has sent time slot acknowledgement frame, if receiving communication acknowledgement frame, then can enter frequency hopping communications state with main frame；If still receiving the time slot distribution frame of main frame, then continue sending time slots acknowledgement frame.During waiting time slot to confirm, main frame without receiving all time slot acknowledgement frames from machine, then can distribute frame by sending time slots again, if still not receiving all time slot acknowledgement frames from machine, then returns fast scanning process of jumping and re-establishes synchronization；If main frame receives all time slot acknowledgement frames from machine, then sending communication acknowledgement frame, group network system enters frequency hopping communications state.
This network-building method, based on tdma, is first master slot, and main frame sends data, and then other be from machine 1 time slot, from machine 2 time slot until from machine n time slot from machine all in the state of reception successively.Reach half-duplex purpose according to this mode, in net, between all radio station, data communication can be realized.Communication process adds the process to slow networking radio station and falls the process of net to radio station.Concrete processing mode is to be separately added into network detection timer M late and fall net detection timer N.
If it is per second that the hop rate of frequency-hopping system is set to 500 jumps, then the duration of each time slot is 2 milliseconds, then whole synchronizing process is less than 120 milliseconds, and falling to net detection process needs from machine feedback acknowledgment, time-consuming 8 milliseconds.In assuming net, existing 1 main frame and 3 network from machine, then obtain following three data:
1) each communication cycle is 4 communication time slots, i.e. 8 milliseconds；
2) slow network entry time occupancy is the ratio of slow networking handling duration and slow incoming communication duration, is 120/8M；
3) falling net detection time occupancy is the ratio falling net handling duration with falling Network Communication duration, is 8/8N；
In order to ensure that higher communication efficiency meeting while slow networking radio station quickly networks, according to the analysis of many experiments result, the value of slow network entry time occupancy being set to 5, the value falling net detection time occupancy is set to 10, then M takes 75, and N takes 10.The numerical value of M and N can be appropriately modified by actual design according to the requirement to traffic rate and to slow networking reaction speed.
When main frame has sent communication acknowledgement frame entrance frequency hopping communications state, two timers add 1 respectively.After main-machine communication time slot terminates, two timers are differentiated:
If 1 timing N arrives, timing M does not arrives: in networking, data communication is interrupted in radio station, synchronous head frame during main frame transmission pair, from machine at respective time slot feedback acknowledgment, if the radio station number of feedback is consistent with radio station number in the net that last time confirms represents do not have radio station to fall net, then continue from machine slotted communication, if radio station number is inconsistent in the net confirming in the radio station number of feedback and synchronizing process indicates that net is fallen in radio station, then returns fast scanning process of jumping and re-establish synchronization.
If 2 timing N do not arrive, timing M to: in networking, radio station directly returns quick scanning process and re-establishes synchronization, to process the networking work in slow networking radio station.
If 3 timing N do not arrive, timing M does not arrives: enters from machine time slot, sends communication data from machine successively.
Fig. 5 is the description to slave time slot distribution during frequency hopping communications, and after entrance communications status, time slot when slave is distributed serially as waiting, each radio station sends data at respective time slot, and other time slots receive data.
Claims (3)
1. a networking implementation method for Fast synchronization frequency hopping radio set, its networking mode is as follows:
The synchronizing process of 1.1 networks, with the fast frequency-hopped scanning of main frame, sets up handshake communication from the mode that machine frequency hopping at a slow speed is followed the tracks of, and slave uses one group of frequency hopping pattern being specifically designed to synchronization；Setting up the communication process after synchronization then uses another set to have the frequency hopping pattern of good autocorrelation, cross correlation；
In 1.2 synchronizing processes, main frame is according to the feedback information from machine receiving, and in dynamic monitoring network, radio station quantity, distributes in real time to communication time slot, removes unnecessary time slot；From machine according to the time slot being assigned to, sending data at respective time slot, whole network keeps strict slot synchronization, and carries out proper communication；
The scanning information that frequency hopping at a slow speed follows the tracks of main frame, the whole network of main frame regulation and control are circulated in 1.3 radio station networking late, send slow networking scanning information at regular intervals, weed out net radio station, add the application radio station that networks late, redistribute time slot, hoc communication network.
2. the networking implementation method of Fast synchronization frequency hopping radio set according to claim 1, it is characterised in that: described 1.1st, the synchronization establishment step in 1.2 is as follows:
Quickly scanning according to synchronising frequency hopping pattern after 2.1 main frame starts, sending identical channel synchronization information at each frequency, synchronizing information comprises feedback slot information；Carry out slow scanning tracking according to the frequency hopping pattern identical with main frame after machine start, the synchronizing information of resident set time Receiving Host on each frequency；
If 2.2 receive, from machine, the channel synchronization head frame that main frame sends, then waiting feedback slot to send feedback acknowledgment frame when arriving, each is different according to the numbering feedback slot of oneself from machine；If being not received by, from machine, the channel synchronization head frame that main frame sends, then continue slow jump from machine and follow the tracks of；Main frame has cycled through synchronizing information and has entered reception state, receives the feedback acknowledgment frame respectively sending from machine；
If 2.3 main frames receive each from the feedback acknowledgment frame of machine, then main frame sets up a slave list according to the feedback information receiving, from machine quantity and from plane No. in record net；Main frame then enter input time slot distribution state, to net in from machine sending time slots distribute frame；Enter reception state after machine has sent feedback acknowledgment frame, the time slot distribution frame of Receiving Host；If main frame is not received by any feedback acknowledgment frame from machine, then return the process after the slave start of 2.1；
2.4 main frames enter reception state after having sent time slot distribution frame, receive each from the time slot acknowledgement frame of machine；Enter transmission state after machine receives time slot distribution frame, by the time slot sending time slots acknowledgement frame of distribution；If main frame does not receive all time slot acknowledgement frames from machine, then return the process of 2.3；Without receiving any time slot acknowledgement frame from machine, then return the process of 2.1；
If 2.5 main frames receive all net in from the time slot acknowledgement frame of machine, then networking synchronize successfully, entrance transmission state；Main frame sends communication acknowledgement frame, enters reception state after machine receives communication acknowledgement frame；Whole network starts time-division slot communication, and each radio station sends data at respective time slot, receives data at non-native time slot.
3. the networking implementation method of Fast synchronization frequency hopping radio set according to claim 1, it is characterised in that: as follows to slow networking radio station application processing procedure in described 1.3:
If 3.1 network when detecting timer late to the count maximum that M(M is slow networking timer), then the process of 2.1, the synchronizing information of slow networking radio station Receiving Host is returned by 2.5, network re-establishes, and adds slow networking radio station, weeds out net radio station；
After 3.2 frequency hopping radio set networks enter communications status, fall net detection timer and the detection timer that networks late starts timing；If when falling to net detection timer to N(N being the count maximum falling net detection timer), then returned the process of 2.4 by 2.5, again received the time slot acknowledgement frame from machine by main frame.
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| CN110290571A (en) * | 2019-06-14 | 2019-09-27 | 中国电子科技集团公司第七研究所 | Main network-building method of data distribution wireless transmission, from platform network-building method, data frame structure |
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