CN112713949A - TTNT data chain channel load statistical method - Google Patents
TTNT data chain channel load statistical method Download PDFInfo
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Abstract
The invention discloses a TTNT data chain channel load statistical method. In the method, members in a data link network count the number of data link pulses sent by a data link end machine on a frequency hopping frequency point, the number of data link pulses sent by the data link end machine on the frequency hopping frequency point, the number of transmission protection time of received data link pulses and the number of transmission protection time of data link pulses sent by the data link end machine in a counting time window, and obtain the duration of the data link pulses, the duration of pulse intervals, the duration of transmission protection and the number of frequency hopping points so as to calculate the load of a data link channel. The technical scheme disclosed by the invention solves the problem of inaccurate channel load statistical parameters in the prior art, improves the accuracy of data link channel load statistics and reduces the conflict probability of data link information.
Description
Technical Field
The present invention relates to a data link channel load statistical method, and more particularly, to a TTNT data link channel load statistical method.
Background
The data link is an important basis for acquiring information advantages in a battlefield and is the key for capturing information rights and acquiring information-based war wins. The data link is referred to as a "multiplier" of combat effectiveness, and is the "adhesive" of the joint combat. The data chain changes the original fighting mode and speeds up the fighting rhythm.
In data link networks, channel bandwidth is a scarce resource. Since all network users share the same channel, when multiple users access the channel at the same time to transmit data, the data will collide with each other on the channel and affect reception, resulting in waste of precious channel resources and reduction of communication performance. Therefore, a network protocol is needed to coordinate and arrange the use of channel resources, so that each user can access the channel in an effective manner, effectively, fairly and reasonably share effective bandwidth resources, realize effective communication among users, and transmit combat information in real time. The quality of a network protocol design determines the quality of performance indexes such as successful transmission probability, throughput, average transmission delay, fairness, stability and the like of data. Therefore, the research on the network protocol has important significance on data link networking.
The random access networking protocol has strong flexibility. In modern local wars, the battlefield situation is changeable instantly, various emergency situations are difficult to predict, and the flexibility and the real-time command and operation capacity of a data chain system can be improved by using a random access networking protocol to carry out networking of a data chain, so that each operation unit can effectively and rapidly share the battlefield situation information in real time. The army TTNT data chain is a typical representation of the random access networking protocol. The TTNT data link uses the CSMA and asynchronous frequency hopping scheme based spma (static priority based media access) protocol. The SPMA does not need to allocate time slots or reserve time slots for the nodes in advance, and only needs to determine whether the packets are accessed to the channels according to the busy and idle degree of the channels, so that the timeliness is ensured. Meanwhile, the SPMA protocol is designed based on the Ad Hoc network, has the characteristics of no center, self-organization, damage resistance, self-healing and the like, and can realize the function of rapidly joining or quitting the network by the network unit. The SPMA protocol adopts a statistical priority mode to carry out channel access control, and can effectively meet the requirements of high speed, low time delay, large capacity and the like.
In the prior art, the TTNT data chain counts the total number of pulses occurring on the channel over a period of time at the physical layer as the channel load. When a priority packet is transmitted, the TTNT data chain compares the channel load with the corresponding priority threshold to determine whether the priority packet is allowed to be transmitted. The existing literature (MAC protocol back-off algorithm [ J ] based on channel occupancy and priority, zhengwenqing, jinhu, guo jian, etc., computer engineering and applications, 2019,55(11),80-84) presents a channel load statistical method, in which the channel load calculation formula is as follows:
wherein the content of the first and second substances,
at a frequency point fiThe number of data packet pulses received at the receiver,
at a frequency point fiThe number of the data packet pulses sent above, t is the data packet pulse duration.
In the TTNT data chain, the transmitted data is transmitted in the form of pulses with pulse time intervals between adjacent pulses, however, in the prior art, the channel load is not calculated by the formula, which reduces the calculated channel load value and cannot correctly reflect the previous channel state. Further, in the TTNT data chain, the data chain pulse signal is transmitted to the channel in a packaged form, and in order to prevent the pulse signal from overlapping among a plurality of users, the data chain pulse package is provided with a transmission protection time with a certain time length. Generally, the duration of the transmission guard time is much longer than the pulse interval time. However, in the prior art, the calculation formula of the channel load does not take the transmission guard time into account either. Therefore, the channel load value counted by the prior art will deviate significantly from the true value of the channel load. TTNT data link compares the channel load to a priority threshold to determine whether the priority packet is allowed to be transmitted. If the error between the counted channel load value and the actual value is large, the TTNT data link is judged wrongly, data link information is sent into a channel for transmission, so that intra-network user data link information conflict can be caused, the success probability of data link information sending is greatly reduced, important battlefield information cannot be sent out successfully in time, the battlefield is delayed, and serious consequences are brought.
Therefore, how to count the channel load of the data link and improve the accuracy of channel load counting are difficult problems to be solved by the existing data link channel load counting method.
Disclosure of Invention
The invention aims to disclose a data link channel load statistical method to improve the accuracy of data link channel state statistics.
In order to achieve the purpose of the invention, the invention provides a TTNT data chain channel load statistical method. In the method, a member in the data link network calculates a channel load C by counting the number of data link pulse signals in a channel within a statistical time window, wherein the channel load C can be represented as:
wherein f isiThe frequency hopping bins that represent the data chains,
indicating that the data link terminal is at the frequency hopping point fiThe number of the received data chain pulses sent by other members is counted,
indicating statistical local data link terminal machine at frequency hopping frequency point fiThe number of data chain pulses transmitted on the data link, M represents the number of frequency hopping points of a data chain terminal, tau represents the duration length of the data chain pulses, delta represents the interval time length of the data chain pulses, and TbIndicating the length of the data link pulse transmission guard time, TsThe length of the statistical time window is indicated,
is represented in the statistical time window TsInternally counting the number of transmission protection times of the received data link pulse，
Is represented in the statistical time window TsAnd internally counting the number of the data link pulse transmission protection time sent by the data link end machine.
Further, in the technical solution disclosed in the present invention, if there are N types of data link pulse transmission guard times, the channel load C may be represented as:
wherein, TbjRepresents the j-th type data chain pulse transmission protection time, j is 1 to N, N is a positive integer,
indicates the number of the j-th type transmission guard time of the received data chain pulse,
and the number of the j type transmission protection time of the data chain pulse sent by the data chain terminal is shown.
Further, in the technical solution disclosed in the present invention, the statistical time window is: starting and stopping a statistical time window according to the induction signal of the data link terminal antenna; starting the counting time window for timing when the data link terminal antenna senses and receives a data link pulse signal; stopping the timing of the statistical time window when the data link pulse signal is not received by sensing the length of a continuous time slot, thereby obtaining the statistical time window TsThe length of time of (c).
Preferably, in the technical solution disclosed in the present invention, the frequency hopping frequency point number M of the data link end machine is 51.
Preferably, in the technical solution disclosed in the present invention, the data chain pulse duration length τ is 6.4 μ s, and the data chain pulse interval time δ length is 6.6 μ s.
Preferably, in the technical solution disclosed in the present invention, the data link pulse transmission protection time type N is 2, and the corresponding data link pulse transmission protection time is Tb1、Tb2Said T isb1Is 1852 μ s, said Tb23087 μ s.
Further, in the technical solution disclosed in the present invention, the statistical time window T issThe value of (c) is variable.
Further, in the technical solution disclosed in the present invention, the statistical time window T issThe type of the transmission guard time of the data link pulse transmitted by the data link end unit can be determined according to the encapsulation type of the transmitted data link pulse.
Preferably, in the technical solution disclosed in the present invention, the length of the one time slot is 7.8125 ms.
Compared with the prior art, the invention has the following beneficial effects:
in the technical scheme disclosed by the invention, the channel load is calculated by counting the number of data link pulse signals in a channel in a counting time window. When the channel load is calculated, not only the pulse interval time parameter is taken into account, but also the transmission protection time parameter during data chain encapsulation is taken into account, so that the channel load is matched with a data chain information transmission scene better, the defect that only the pulse duration parameter is taken into account in the channel load calculation in the prior art is solved, the calculated channel load is more accurate, the real condition of the current channel can be reflected, and the intra-network member information transmission conflict probability is greatly reduced. Further, in the technical solution disclosed in the present invention, the size of the statistical time window is variable, and the statistical time window timing is started or stopped according to the presence or absence of the data link antenna sensing pulse signal. Compared with the mode of fixing the statistical time window in the prior art, the method can better reflect the channel state and enable the statistical pulse data to be more accurate.
Additional advantages and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
The accurate statistics of the channel load of the data link is an important technical measure for reducing the collision of data link signals. In the prior art, the pulse interval time parameter and the transmission protection time parameter are not considered when the channel load is calculated, so that the calculated channel load value is reduced, and the current channel state cannot be correctly reflected. The error between the counted channel load value and the true value is larger, so that the data link judges the channel state wrongly, user data link information conflicts in the network can be caused when the data link information is sent into the channel for transmission, and the success probability of sending the data link information is greatly reduced.
In order to solve the problems in the prior art, the embodiment of the invention discloses a TTNT data chain channel load statistical method. In the method, a member in the data link network calculates a channel load C by counting the number of data link pulse signals in a channel within a statistical time window, wherein the channel load C can be represented as:
wherein f isiThe frequency hopping bins that represent the data chains,
indicating that the data link terminal is at the frequency hopping point fiThe number of the received data chain pulses sent by other members is counted,
indicating statistical local data link terminal machine at frequency hopping frequency point fiThe number of data chain pulses transmitted on the data link, M represents the number of frequency hopping points of a data chain terminal, tau represents the duration length of the data chain pulses, and delta represents the data chain pulsesLength of interval, TbIndicating the length of the data link pulse transmission guard time, TsThe length of the statistical time window is indicated,
is represented in the statistical time window TsThe number of transmission protection time of the received data chain pulse is internally counted,
is represented in the statistical time window TsAnd internally counting the number of the data link pulse transmission protection time sent by the data link end machine.
Further, in the technical solution disclosed in the embodiment of the present invention, if there are N types of data link pulse transmission guard times, the channel load C may be represented as:
wherein, TbjIndicating a data link pulse transmission guard time of the j-th type, j being 1 to N,
the number of j type transmission protection time of the received data chain pulse is counted,
the number of the j type transmission protection time of the data chain pulse sent by the data chain terminal is counted.
The transmission of the data link message is realized by carrier modulation, and the information to be transmitted is loaded on a carrier and sent to an antenna in a pulse form for transmission. For example, a TTNT data chain and a Link-16 data chain of the united states of america loads a message to be transmitted on a carrier by MSK modulation, and performs modulation with 5 bits as a group, a radio frequency signal radiated by a data chain terminal is a pulse signal in a string, the duration of each pulse is 6.4 μ s, and the interval between pulses is 6.6 μ s. In the data chain, the reason for setting the pulse interval time is to further expand the spectral bandwidth of the data chain signal to reduce the power spectral density of the data chain signal and improve the concealment of the data chain signal to increase the anti-interference capability of the data chain signal in a complex electromagnetic environment. Therefore, when counting the channel load of the data link, not only the duration τ of the data link pulse signal but also the interval duration δ of the data link pulse signal should be considered. If only the data chain pulse signal duration τ is considered, the calculated channel loading value will be reduced and the channel state is estimated incorrectly. Preferably, in the technical solution disclosed in the embodiment of the present invention, the data link pulse duration length τ is 6.4 μ s, and the data link pulse interval time δ length is 6.6 μ s.
The data link information is a formatted message formed by encoding the data link information by adopting a certain message format. Before being sent to a channel for transmission, the data needs to be packaged according to a certain packaging format and then sent to the channel for transmission. Therefore, the data chain pulse signals transmitted in the channel are not independent from each other, but are closely linked according to a certain packaging format. For example, the TTNT data chain of the united states army is encoded and encapsulated by using the same J message format as the Link-16 data chain, and the encapsulation types include: the standard double-pulse package format STD-DP, the double-compression single-pulse package format P2SP, the double-compression double-pulse package format P2DP and the quadruple-compression single-pulse package format P4 SP. And a transmission protection time period is set in the last part of the data chain encapsulation. The transmission guard period is used to allow the next signal to reach other user data link terminals within range before the next signal begins, so as to avoid transceiver collision. Therefore, the setting of the guard time is transmitted with the aim of preventing signal overlap. On the contrary, if the transmission protection time is not set, the time is used for data chain pulse signal transmission, pulse signal collision is inevitably generated, and the success probability of data chain information transmission is reduced. Therefore, when performing the data link channel load statistics, it must be included in the calculation formula; otherwise, the true state of the data link channel cannot be reflected correctly. In the prior art, the transmission protection time parameter is not included in the calculation formula for the statistics of the load of the data link channel, so that the load state of the data link channel cannot be correctly counted.
Typically, there are two types of transmission guard times for the data chain, one being 1852 μ s and the other being 3087 μ s, for 300n mil and 500n mil distance transmissions, respectively. Preferably, in the technical solution disclosed in the embodiment of the present invention, the data link pulse transmission protection time type N is 2, and the corresponding data link pulse transmission protection time is Tb1、Tb2Said T isb1Is 1852 μ s, said Tb23087 μ s.
According to the related technology of TTNT data chain and J message format, the transmission protection time TbThe magnitude of the value is typically much larger than the pulse interval time δ and smaller than the one slot length size. Thus, in the statistical time window TsWhen the number of the transmission protection time of the received data chain pulse is counted, the relation delta is satisfied<Tb<The length of a time slot can be confirmed according to the relation between the transmission protection time and the time interval of the pulse and the unit length of the time slot. When the data chain terminal antenna does not receive the data chain pulse signal, timing the moment when the data chain pulse signal is not received, and when the time length of the data chain pulse not received is greater than the pulse interval time delta and less than the time slot length, determining the time length as the transmission protection time, and performing corresponding timing operation and counting statistics to obtain the j type transmission protection time number of the received data chain pulse, namely the j type transmission protection time number
Of the value of (1), and a data link pulse transmission guard time T of the jth typebjThe numerical value of (c).
As can be seen from the foregoing, different encapsulation types correspond to different transmission protection times. Further, in the technical solution disclosed in the embodiment of the present invention, the statistical time window T issIn addition, the transmission protection time type of the data link pulse transmitted by the data link end unit can be confirmed according to the encapsulation type of the transmitted data link pulse. The encapsulation type of the data link information can be obtained from the header word content of the J message format. The header word serves to help the datalink end to interpret and process the received message correctly. For example, the "Type" data field in bits 0 through 2 of the header word identifies the encapsulation Type of the data chain message. In a statistical time window TsIn addition, the number of the data link pulse transmission protection time transmitted by the data link end machine can be counted according to the number of the transmitted header words and the content of the corresponding data fields. The related art of the data chain header word is mature in the prior art, and is not described in detail here.
Further, in the technical solution disclosed in the embodiment of the present invention, the method for determining the statistical time window includes: starting and stopping a statistical time window according to the induction signal of the data link terminal antenna; starting the counting time window for timing when the data link terminal antenna senses and receives a data link pulse signal; stopping the timing of the statistical time window when the data link pulse signal is not received by sensing the length of a continuous time slot, thereby obtaining the statistical time window TsThe length of time of (c). Therefore, in the technical solution disclosed in the embodiment of the present invention, the statistical time window T is describedsThe value of (c) is variable. In the prior art, the size of the statistical time window is fixedly set to be 100ms, and the size of the statistical time window is not changed no matter whether the current channel is congested or idle. In the technical scheme disclosed by the embodiment of the invention, the time window T is countedsThe value can be automatically adjusted according to the busy and idle changes of the channel, and compared with a mode of counting the number of data chain pulses by the fixed counting time window, the method can better reflect the current channel condition and is beneficial to improving the accuracy and flexibility of channel load counting.
Preferably, in the technical solution disclosed in the embodiment of the present invention, the size of the length of the time slot is 7.8125 ms.
In order to improve the anti-interference capability of data Link messages, anti-interference measures such as frequency hopping are generally adopted, for example, the frequency hopping technology is adopted in the TTNT data Link and the Link-16 data Link of the U.S. army. When the frequency hopping technology is adopted, the carrier frequency of the transmission information is pseudo-randomly selected from 51 frequency points in the 255MHz wide microwave L-band. The frequency hopping technology is adopted, so that the frequency of the transmitted signal is difficult to track and capture, the detection probability is reduced, and the anti-interference capability is greatly enhanced.
Preferably, in the technical solution disclosed in the embodiment of the present invention, the number M of frequency hopping points of the data link end machine is 51.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (9)
1. A TTNT data link channel load statistical method, wherein a member in a data link network calculates a channel load C by counting the number of data link pulse signals in a channel within a statistical time window, and the channel load C can be represented as:
wherein f isiThe frequency hopping bins that represent the data chains,
indicating that the data link terminal is at the frequency hopping point fiThe number of the received data chain pulses sent by other members is counted,
indicating statistical local data link terminal machine at frequency hopping frequency point fiThe number of data chain pulses transmitted on the data link, M represents the number of frequency hopping points of a data chain terminal, tau represents the duration length of the data chain pulses, delta represents the interval time length of the data chain pulses, and TbNumber of representationsAccording to the length of the guard time of the link pulse transmission, TsThe length of the statistical time window is indicated,
is represented in the statistical time window TsThe number of transmission protection time of the received data chain pulse is internally counted,
is represented in the statistical time window TsAnd internally counting the number of the data link pulse transmission protection time sent by the data link end machine.
2. The TTNT data chain channel loading statistics method of claim 1, wherein the data chain burst transmission guard time is of N types, where N is a positive integer, then the channel loading C is represented as:
wherein, TbjIndicating a data link pulse transmission guard time of the j-th type, j being 1 to N,
indicates the number of the j-th type transmission guard time of the received data chain pulse,
and the number of the j type transmission protection time of the data chain pulse sent by the data chain terminal is shown.
3. The TTNT data chain channel load statistics method of claim 1, wherein the statistical time window is: starting and stopping a statistical time window according to the induction signal of the data link terminal antenna; starting the statistical time when the data link terminal antenna senses and receives the data link pulse signalTiming a window; stopping the timing of the statistical time window when the data link pulse signal is not received by sensing the length of a continuous time slot, thereby obtaining the statistical time window TsThe length of time of (c).
4. The TTNT data chain channel load statistical method of claim 1, wherein the number M of hopping frequency points of the data chain terminal is 51.
5. The TTNT data chain channel loading statistics method of claim 1, wherein the data chain pulse duration length τ is 6.4 μ β and the data chain pulse interval time δ length is 6.6 μ β.
6. The TTNT data chain channel load statistics method of claim 1, wherein the data chain pulse transmission protection time type N is 2, and the corresponding data chain pulse transmission protection time is Tb1、Tb2Said T isb1Is 1852 μ s, said Tb23087 μ s.
7. The TTNT data chain channel load statistics method of claim 1, wherein the statistical time window TsThe value of (c) is variable.
8. The TTNT data chain channel load statistics method of claim 2, wherein during the statistical time window TsThe type of the transmission guard time of the data link pulse transmitted by the data link end unit can be determined according to the encapsulation type of the transmitted data link pulse.
9. The TTNT data chain channel load statistics method of claim 3, wherein the one time slot length is 7.8125 ms.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334936A (en) * | 2008-08-07 | 2008-12-31 | 民航数据通信有限责任公司 | Method and device for expanding monitoring range of air craft based on ADS-B |
| CN101667962A (en) * | 2009-10-14 | 2010-03-10 | 天津大学 | Dynamic bandwidth allocation method for self-adapting service quality assurance in Ethernet passive optical network |
| CN106412958A (en) * | 2016-10-21 | 2017-02-15 | 燕山大学 | Method for quickly establishing data link in wireless network |
| CN106411527A (en) * | 2016-09-30 | 2017-02-15 | 北京邮电大学 | Data authentication method in very-high-frequency data chain transmission |
| CN106572070A (en) * | 2015-10-12 | 2017-04-19 | 中兴通讯股份有限公司 | Hidden terminal determine method in full duplex communication, and corresponding device and system |
| US9712230B1 (en) * | 2014-09-17 | 2017-07-18 | Rockwell Collins, Inc. | Directional statistical priority multiple access system and related method |
| CN109787655A (en) * | 2019-01-16 | 2019-05-21 | 南京航空航天大学 | Design method of pattern when a kind of frequency hopping jump suitable for counting the access of priority multiple access |
| US20190363819A1 (en) * | 2018-05-22 | 2019-11-28 | Bae Systems Information And Electronic Systems Integration Inc. | Link 16 transceiver with integral signal nulling system |
-
2020
- 2020-11-10 CN CN202011244870.5A patent/CN112713949B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334936A (en) * | 2008-08-07 | 2008-12-31 | 民航数据通信有限责任公司 | Method and device for expanding monitoring range of air craft based on ADS-B |
| CN101667962A (en) * | 2009-10-14 | 2010-03-10 | 天津大学 | Dynamic bandwidth allocation method for self-adapting service quality assurance in Ethernet passive optical network |
| US9712230B1 (en) * | 2014-09-17 | 2017-07-18 | Rockwell Collins, Inc. | Directional statistical priority multiple access system and related method |
| CN106572070A (en) * | 2015-10-12 | 2017-04-19 | 中兴通讯股份有限公司 | Hidden terminal determine method in full duplex communication, and corresponding device and system |
| CN106411527A (en) * | 2016-09-30 | 2017-02-15 | 北京邮电大学 | Data authentication method in very-high-frequency data chain transmission |
| CN106412958A (en) * | 2016-10-21 | 2017-02-15 | 燕山大学 | Method for quickly establishing data link in wireless network |
| US20190363819A1 (en) * | 2018-05-22 | 2019-11-28 | Bae Systems Information And Electronic Systems Integration Inc. | Link 16 transceiver with integral signal nulling system |
| CN109787655A (en) * | 2019-01-16 | 2019-05-21 | 南京航空航天大学 | Design method of pattern when a kind of frequency hopping jump suitable for counting the access of priority multiple access |
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