CN106533592B - A kind of multi-service data communication means and communication system for underwater acoustic network - Google Patents
A kind of multi-service data communication means and communication system for underwater acoustic network Download PDFInfo
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- CN106533592B CN106533592B CN201611054473.5A CN201611054473A CN106533592B CN 106533592 B CN106533592 B CN 106533592B CN 201611054473 A CN201611054473 A CN 201611054473A CN 106533592 B CN106533592 B CN 106533592B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/80—Actions related to the user profile or the type of traffic
- H04L47/805—QOS or priority aware
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
- H04L47/82—Miscellaneous aspects
- H04L47/822—Collecting or measuring resource availability data
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Abstract
The present invention relates to a kind of multi-service data communication means and communication system for underwater acoustic network, this multi-service data communication means is the following steps are included: step 1: one decision node of setting, detection obtains the usable spectrum resource of underwater low interference, and a common control channel and several transmission channels are therefrom marked off, a threshold value is generated according to transmission channel number；Step 2: thering is the user node of communication requirement to send the service type information of its transmitted data to decision node, decision node sequentially sorts to each service type information according to pre-defined algorithm, and corresponds and generate corresponding types value；Step 3: compared with all kinds of offsets of generation are made decisions with threshold value；If such offset is less than threshold value, distributes such offset owning user node access transmission channel and communicated；If such offset is not less than threshold value, next time slot is waited until, return step 1 re-executes.
Description
Technical field
The invention belongs to subsurface communication fields, and in particular to a kind of multi-service data communication means for underwater acoustic network and
Communication system.
Background technique
Underwater sound communication is mainly used in military field at the beginning, recently as marine resources constantly by human development benefit
With, such as to environmental system pollution monitoring, marine resources and hydrologic exploration, underwater frogman's operation etc., so that underwater sound communication is answered
It is more and more openr with prospect.And as the mankind are movable increasingly frequent under water, data volume is bigger, it is desirable that obtains more seas
Foreign information is increasingly becoming one of great social demand.Wherein underwater video signal becomes the core of multimedia business transmission, and single
Road transmission channel has obviously been unsatisfactory for current requirement.Other than transmitting underwater video signal, audio signal, sensor information etc.
All by the content as transmission.Then, the design of multi-service data communication system is particularly important in underwater acoustic network.
However, the underwater frequency spectrum resource that can be used for data transmission is extremely limited, underwater acoustic channel is again vulnerable to high ambient noise
Interference, it is extremely unstable.When multiple user nodes share limited underwater frequency spectrum resource, corresponding underwater acoustic channel is in multiple use
It is assigned between the node of family.Since communication system is not aware that the type of service of transmitted data, in some cases, to real-time
Property demanding data delay communication will cause due to channel confliction, if using there are the underwater acoustic channels of noise jamming to transmit number
According to will affect the stability of data transmission, or even also will cause the loss of information.
Summary of the invention
The purpose of the present invention is overcoming the above-mentioned deficiency of the prior art, a kind of multi-service data for underwater acoustic network is provided
Communication means and device are divided by the usable spectrum resource that detection obtains underwater low interference, for the industry of different data
Service type carries out the preferential distribution of transmission channel, has ensured the requirement of the stability and timeliness of underwater multi-service data communication.
In order to solve the above technical problems, the present invention provides a kind of multi-service data communication means for underwater acoustic network,
The following steps are included: step 1: one decision node of setting, detection obtain the usable spectrum resource of underwater low interference, and therefrom divide
A common control channel and several transmission channels out generate a threshold value according to transmission channel number；Step 2: thering is communication to need
The user node asked sends the service type information of its transmitted data to decision node, and decision node is according to pre-defined algorithm to each
Service type information sequentially sorts, and corresponds and generate corresponding types value；Step 3: by all kinds of offsets and thresholding of generation
Value, which makes decisions, to be compared；If such offset be less than threshold value, distribute such offset owning user node access transmission channel into
Row communication；If such offset is not less than threshold value, next time slot is waited until, return step 1 re-executes.
Further, a decision node is set in the step 1, the usable spectrum resource that detection obtains underwater low interference includes
Following steps:
Step 1.1: one decision node of setting detects the idle channel in frequency range, obtains current each underwater sound letter
The energy value E of road ambient noisei；
Step 1.2: setting one and channel circumstance noise power value EiThe detected value ε to compare；
Step 1.3: if Ei>=ε then determines that interference signal exists, and channel is unavailable；If Ei< ε then determines that degree of disturbance is lower
For available channel；
Step 1.4: updating usable spectrum resource, repeat step 1.3 and finished up to the idle channel in frequency range compares.
Further, the common control channel is suitable for service type information and channel between user node and decision node
The transmission of assignment signalling；And
The transmission channel is suitable for the communication service data transmission between each user node.
Further, the pre-defined algorithm in the step 2 is suitable for using bubble sort method, i.e.,
Each service type information is according to priority compared two-by-two, by the high to Low sequence of priority, according to preferential level
Sequence exchanges position；
The service type information includes: service type information, underwater video signal, audio signal and sensor information,
And priority are as follows: service type information > underwater video signal > audio signal > sensor information.
Further, structure of time slot is used when each node communicates in underwater acoustic network；
The structure of time slot includes: Channel Detection and division sub-slots, service type information transmission sub-slots, channel distribution
Signalling sub-slots and communication service data transmit sub-slots.
Another aspect, the present invention also provides a kind of multi-service data communication systems, comprising: several user nodes are used for
It is communicated with decision node, and carries out communication service data transmission；A decision node is set, obtains underwater low interference for detecting
Usable spectrum resource is divided, and generates corresponding threshold value and types value, and according to court verdict to each user node
Distribute transmission channel.
Further, the user node includes: Transmit-Receive Unit and data cell；The Transmit-Receive Unit include: transmitting module,
Modulation module, receiving module, demodulation module and channel access module；Wherein the transmitting module is connected with modulation module, is used for
Realization, which modulates the signal on specified channel, to be sent；The transmitting module includes: sequentially connected signal transmitting transducing
Device, power match amplifier；The modulation module includes: sequentially connected D/A converter, digital modulator；And it described connects
It receives module to be connected with demodulation module, be demodulated for realizing the signal received in designated channel；The receiving module includes: suitable
The signal of secondary connection receives energy converter, Signal Matching amplifier；The demodulation module include: sequentially connected A/D converter and
Digital demodulator；And the channel access module is connected with digital modulator, digital demodulator respectively, for realizing signal hair
Send and receive the selection of channel；The data cell includes: service type information processor, communication service data memory；Its
Middle service type information processor is used to generate the service type information of transmitted data.
Further, the decision node include: information transmission unit, interchannel noise detection unit, order buffer unit and
Channel data processing unit；The wherein information transmission unit, for realizing the communication between each user node；The channel is made an uproar
Sound detection unit is for realizing to underwater acoustic channel environmental noise power value EiAcquisition, and include: sequentially connected energy acceptance
Energy converter, narrow band filter, square-law detector, integrator and A/D sampler；The order buffer unit, for realizing right
Each service type information sequentially sorts by pre-defined algorithm, and generates corresponding types value；The channel data processing unit packet
It includes: detected value setup module, first comparator, channel management module, the second comparator and channel assignment module；The wherein inspection
Measured value setup module is for being arranged one and channel circumstance noise power value EiThe detected value ε to compare；The two of first comparator
A input terminal is connected with A/D sampler and detected value setup module respectively, for carrying out each channel circumstance noise power value EiWith
The comparison of detected value ε；The channel management module is connected with the output end of first comparator, can for obtain underwater low interference
It is divided with frequency spectrum resource, and generates a threshold value；Two input terminals of second comparator respectively with order buffer list
Member, the output end of channel management module are connected, and the size for carrying out all kinds of offsets and threshold value is adjudicated；And the channel point
It is connected with module with the output end of the second comparator, for distributing transmission channel to user node.
To sum up, the present invention provides a kind of multi-service data communication means and communication system for underwater acoustic network, passes through
The usable spectrum resource that detection obtains underwater low interference is divided, and carries out transmission channel for the type of service of different data
Preferential distribution has ensured the requirement of the stability and timeliness of underwater multi-service data communication.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, below according to specific embodiment and in conjunction with attached drawing,
The present invention is described in further detail, in which:
Fig. 1 is a kind of functional block diagram of underwater acoustic network communication system provided by the invention；
Fig. 2 is a kind of functional block diagram of user node provided by the invention；
Fig. 3 is a kind of functional block diagram of decision node provided by the invention；
Fig. 4 is a kind of structure of time slot schematic diagram provided by the invention；
Fig. 5 is the method flow diagram that a kind of multi-service data for underwater acoustic network provided by the invention communicates；
Fig. 6 is the method flow diagram for the usable spectrum resource that a kind of detection provided by the invention obtains underwater low interference；
Fig. 7 is the functional block diagram of interchannel noise detection unit in the present invention；
Fig. 8 is the structural schematic diagram that service type information of the invention transmits sub-slots；
Fig. 9 is the sequence schematic diagram of priority of the invention.
Title shown in numbering in the drawing are as follows:
Transmit-Receive Unit 1；Transmitting module 11；Signal transmitting transducer 111；Power match amplifier 112；Modulation module 12；
D/A converter 121；Digital modulator 122；Receiving module 13；Signal receives energy converter 131；Signal Matching amplifier 132；Solution
Mode transfer block 14；A/D converter 141；Digital demodulator 142；Channel access module 15；
Data cell 2；Service type information processor 21；Communication service data memory 22；
Information transmission unit 3；
Interchannel noise detection unit 4；Energy acceptance energy converter 41；Narrow band filter 42；Square-law detector 43；Integrator
44；A/D sampler 45；
Order buffer unit 5；
Channel data processing unit 6；Detected value setup module 61；First comparator 62；Channel management module 63；Second ratio
Compared with device 64；Channel assignment module 65.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment 1
The present embodiment 1 provides a kind of multi-service data communication system for underwater acoustic network.
Fig. 1 is a kind of structural schematic diagram of underwater acoustic network communication system provided by the invention, comprising: several user nodes,
For communicating with decision node, and carry out communication service data transmission；One decision node obtains low under water do for detecting
The usable spectrum resource disturbed is divided, and generates corresponding threshold value and types value, and according to court verdict to each user
Node distributes transmission channel.
Fig. 2 is a kind of structural schematic diagram of user node provided by the invention.
The user node includes: Transmit-Receive Unit 1 and data cell 2.The Transmit-Receive Unit 1, by transmitting module 11, modulation
Module 12, receiving module 13, demodulation module 14 and channel access module 15 form.Transmitting module 11 is connected with modulation module 12,
It is sent for realizing to modulate the signal on specified channel.The transmitting module 11, is emitted by sequentially connected signal
Energy converter 111 and power match amplifier 112 form.The modulation module 12, by sequentially connected 121 sum number of D/A converter
Word modulator 122 forms.Receiving module 13 is connected with demodulation module 14, for realizing that receiving the signal in designated channel is solved
It adjusts.The receiving module 13 receives energy converter 131 by sequentially connected signal and Signal Matching amplifier 132 forms.The solution
Mode transfer block 14 is made of sequentially connected A/D converter 141 and digital demodulator 142.Channel access module 15 respectively with number
Modulator 122 is connected with digital demodulator 142, and the selection of channel is sent or received for realizing signal.The channel access mould
Block 15 is suitable for realizing using microprocessor.The data cell 2, is deposited by service type information processor 21 and communication service data
Reservoir 22 forms.Wherein, service type information processor 21 is used to generate the service type information of transmitted data.
Fig. 3 is a kind of structural schematic diagram of decision node provided by the invention.The decision node includes: that information transmission is single
Member 3, interchannel noise detection unit 4, order buffer unit 5 and channel data processing unit 6.The information transmission unit 3, is used for
Realize the communication between each user node.The interchannel noise detection unit 4, by sequentially connected energy acceptance energy converter 41,
Narrow band filter 42, square-law detector 43, integrator 44 and A/D sampler 45 form, for realizing to underwater acoustic channel environment
Noise power value EiAcquisition.The order buffer unit 5, is sequentially arranged for realizing to each service type information by pre-defined algorithm
Sequence, and generate corresponding types value.The channel data processing unit 6, by detected value setup module 61, first comparator
62, channel management module 63, the second comparator 64 and channel assignment module 65 form.Detected value setup module 61 is for being arranged one
A and channel circumstance noise power value EiThe detected value ε to compare.Two input terminals of first comparator 62 are sampled with A/D respectively
Device 45 is connected with detected value setup module 61, for carrying out each channel circumstance noise power value EiCompared with detected value ε.Channel
Management module 63 is connected with the output end of first comparator 62, and the usable spectrum resource for obtaining underwater low interference is drawn
Point, and a threshold value is generated according to transmission channel number.Two input terminals of the second comparator 64 respectively with order buffer unit 5
It is connected with channel management module 63, the size for carrying out all kinds of offsets and threshold value is adjudicated.Channel assignment module 65 and second
The output end of comparator 64 is connected, for distributing transmission channel to user node.
Embodiment 2
On that basis of example 1, a kind of multi-service for underwater acoustic network is used between each user node and decision node
Data communications method uses structure of time slot when each node communicates in underwater acoustic network, structural schematic diagram is as shown in figure 4, by believing
Road detection and division sub-slots, service type information transmit sub-slots, channel distribution signalling sub-slots and communication service
Data transmission time slot composition.This method is divided by the usable spectrum resource that detection obtains underwater low interference, for not
The preferential distribution that transmission channel is carried out with the type of service of data has ensured the stability and in time of underwater multi-service data communication
The requirement of property, method flow diagram are as shown in Figure 5, comprising the following steps:
Step 1: one decision node of setting, detection obtain the usable spectrum resource of underwater low interference, and therefrom mark off one
Common control channel and several transmission channels generate a threshold value according to transmission channel number.
In the above-described embodiments, the characteristics of narrow using underwater acoustic channel frequency band, easy full frequency band is monitored in Channel Detection and is drawn
Molecule time slot detects the usable spectrum resource for obtaining underwater low interference using following methods, to avoid access strong noise dry
The underwater acoustic channel disturbed has ensured the stability of data transmission, and corresponding flow chart is as shown in Figure 6:
Step 1.1: one decision node of setting detects the idle channel in frequency range, obtains current each underwater sound letter
The energy value E of road ambient noisei；
Step 1.2: setting one and channel circumstance noise power value EiThe detected value ε to compare；
Step 1.3: if Ei>=ε then determines that interference signal exists, and channel is unavailable；If Ei< ε then determines that degree of disturbance is lower
For available channel；
Step 1.4: updating usable spectrum resource, repeat step 1.3 and finished up to the idle channel in frequency range compares.
In the above-described embodiments, each underwater acoustic channel environmental noise power valueAcquisition process such as Fig. 7
It is shown.Wherein, when detecting between in T, received by receiving energy converter and be detected the noise signal of channel, and pass through narrow-band filtering
Device 42 is input in square-law detector, and passes sequentially through integrator, the completion of A/D sampler to underwater acoustic channel environmental noise power
ValueCalculating, Ei indicates corresponding underwater acoustic channel environmental noise power value in formula, and M is indicated when detecting
Between in T A/D sampler institute sampled point number.
In the above-described embodiments, the common control channel is used for the transmission of service type information and channel distribution signaling；
Communication service data of the transmission channel for user node is transmitted；The threshold value size is carried out according to transmission channel number
Setting.When transmission channel number is more, threshold value will be turned up, and when transmission channel number is less, threshold value will be turned down.Example
Such as, it is assumed that transmission channel number is 1,2,3,4 ... when, a kind of corresponding threshold value may be set to 0001,0010,0011,
0100 ... (here for the convenience of digital processing, being expressed as binary form).
Step 2: thering is the user node of communication requirement to send the service type information of its transmitted data to decision node, certainly
Plan node sequentially sorts to each service type information according to pre-defined algorithm, and corresponds and generate corresponding types value.
In the above-described embodiments, sub-slots are transmitted in service type information, there is the user node of communication requirement to pass through public
Control channel sends its service type information to decision node in a time multiplexed manner, as shown in Figure 8.
In the above-described embodiments, the type of service of the transmission data includes: real-time service information, underwater video letter
Number, audio signal and sensor information.The type of service and its corresponding service type information, priority level such as the following table 1 institute
Show.
The type of service and its corresponding type information, priority level of the transmission data of table 1
In the above-described embodiments, the pre-defined algorithm uses bubble sort method, specific implementation are as follows: to each service type information
According to priority compared two-by-two, by the high to Low sequence of priority, position is exchanged according to priority order.If there is priority
Identical situation, then the successive time of each service type information according to received by decision node is ranked up.Then, according to
Ranking results correspond and generate corresponding types value (types value corresponding to the high service type information of priority is smaller).
For example, a kind of types value of generation is 0000,0001,0010 after sorting from high to low to the priority of each service type information,
0011 ... (binary form), as shown in Figure 9.Wherein, underwater real-time service information such as, but not limited to includes: and needs tightly
The information suddenly handled or the data information stringent to time requirement；For example underwater warning information of sensor information, sensor letter
Breath may be considered the non-temporal underwater environment parameter for requiring stringent data, perceiving by sensor, such as hydraulic pressure, water temperature, water
Lower geography information etc..
Step 3: compared with all kinds of offsets of generation are made decisions with threshold value, if such offset is less than threshold value, dividing
It is communicated with such offset owning user node access transmission channel；If such offset is greater than or equal to threshold value, wait
To next time slot, return step 1 is re-executed.
In the above-described embodiments, sub-slots are transmitted in assignment signalling, decision node is by sentencing according to types value and threshold value
Certainly compare to distribute transmission channel, and result is broadcasted into underwater acoustic network to all user nodes.It is passed in communication service data
Defeated sub-slots, the user node for obtaining channel distribution communicate access transmission channel.For example, when transmission channel number is 2
When, when to generate a kind of threshold value be 0010, corresponding types value is the section of user belonging to 0000 and 0001 in the above-described embodiments
Point can be communicated by preferentially distribution access transmission channel, and other users node is then needed to wait for next time slot, is returned
Step 1 re-executes.To ensure that the high business datum of priority can be by stabilization, timely transmit by this method.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (8)
1. a kind of multi-service data communication means for underwater acoustic network, which comprises the following steps:
Step 1: one decision node of setting, detection obtain the usable spectrum resource of underwater low interference, and therefrom mark off a public affairs
Control channel and several transmission channels altogether generate a threshold value according to transmission channel number；
Step 2: thering is the user node of communication requirement to send the service type information of its transmitted data, decision section to decision node
Point sequentially sorts to each service type information according to pre-defined algorithm, and corresponds and generate corresponding types value；
Step 3: compared with all kinds of offsets of generation are made decisions with threshold value；
If such offset is less than threshold value, distributes such offset owning user node access transmission channel and communicated；If should
Types value is not less than threshold value, then waits until next time slot, return step 1 re-executes；
The size of the threshold value is set according to transmission channel number；When transmission channel number is more, threshold value will be adjusted
Height, when transmission channel number is less, threshold value will be turned down；And
The service type information includes: real-time service information, underwater video signal, audio signal and sensor information.
2. multi-service data communication means described according to claim 1, which is characterized in that
Set a decision node in the step 1, detection obtain the usable spectrum resource of underwater low interference the following steps are included:
Step 1.1: one decision node of setting detects the idle channel in frequency range, obtains current each underwater acoustic channel ring
The energy value E of border noisei；
Step 1.2: setting one and channel circumstance noise power value EiThe detected value ε to compare；
Step 1.3: if Ei>=ε then determines that interference signal exists, and channel is unavailable；If Ei< ε then determines that degree of disturbance is lower for can
Use channel；
Step 1.4: updating usable spectrum resource, repeat step 1.3 and finished up to the idle channel in frequency range compares.
3. the multi-service data communication means according to claim 2, which is characterized in that
The common control channel is suitable for service type information and channel distribution signaling between user node and decision node
Transmission；And
The transmission channel is suitable for the communication service data transmission between each user node.
4. the multi-service data communication means according to claim 3, which is characterized in that
Pre-defined algorithm in the step 2 is suitable for using bubble sort method, i.e.,
Each service type information is according to priority compared two-by-two, by the high to Low sequence of priority, according to priority order come
Exchange position；
And the priority of each service type information are as follows: real-time service information > underwater video signal > audio signal > sensor letter
Breath.
5. the multi-service data communication means according to claim 4, which is characterized in that
Structure of time slot is used when each node communicates in underwater acoustic network；
The structure of time slot includes: Channel Detection and division sub-slots, service type information transmission sub-slots, channel distribution signaling
It transmits sub-slots and communication service data transmits sub-slots.
6. a kind of multi-service data communication system for underwater acoustic network characterized by comprising
Several user nodes for communicating with decision node, and carry out communication service data transmission；
A decision node is set, the usable spectrum resource for detecting the underwater low interference of acquisition is divided, and is generated corresponding
Threshold value and types value, and transmission channel is distributed to each user node according to court verdict；I.e.
There is the user node of communication requirement to send the service type information of its transmitted data to decision node, decision node according to
Pre-defined algorithm sequentially sorts to each service type information, and corresponds and generate corresponding types value；
Compared with all kinds of offsets of generation are made decisions with threshold value；
If such offset is less than threshold value, distributes such offset owning user node access transmission channel and communicated；
If such offset is not less than threshold value, next time slot is waited until, reset a decision node；
The size of the threshold value is suitable for being set according to the number of transmission channel, when transmission channel number is more, thresholding
Value will be turned up, and when transmission channel number is less, threshold value will be turned down；And
The service type information includes: real-time service information, underwater video signal, audio signal and sensor information.
7. multi-service data communication system according to claim 6, which is characterized in that
The user node includes: Transmit-Receive Unit and data cell；
The Transmit-Receive Unit includes: transmitting module, modulation module, receiving module, demodulation module and channel access module；Wherein
The transmitting module is connected with modulation module, is sent for realizing modulating the signal on specified channel；
The transmitting module includes: sequentially connected signal transmitting transducer, power match amplifier；
The modulation module includes: sequentially connected D/A converter, digital modulator；And
The receiving module is connected with demodulation module, is demodulated for realizing the signal received in designated channel；
The receiving module includes: that sequentially connected signal receives energy converter, Signal Matching amplifier；
The demodulation module includes: sequentially connected A/D converter and digital demodulator；And
The channel access module is connected with digital modulator, digital demodulator respectively, sends and receives letter for realizing signal
The selection in road；
The data cell includes: service type information processor, communication service data memory；Wherein
Service type information processor is used to generate the service type information of transmitted data.
8. multi-service data communication system according to claim 7, which is characterized in that
The decision node includes: information transmission unit, interchannel noise detection unit, order buffer unit and channel data processing
Unit；Wherein
The information transmission unit, for realizing the communication between each user node；
The interchannel noise detection unit is for realizing to underwater acoustic channel environmental noise power value EiAcquisition, and include: sequentially to connect
Energy acceptance energy converter, narrow band filter, square-law detector, integrator and the A/D sampler connect；
The order buffer unit, sequentially sorts for realizing to each service type information by pre-defined algorithm, and generates corresponding
Types value；
The channel data processing unit includes: detected value setup module, first comparator, channel management module, second compares
Device and channel assignment module；Wherein
The detected value setup module is for being arranged one and channel circumstance noise power value EiThe detected value ε to compare；
Two input terminals of first comparator are connected with A/D sampler and detected value setup module respectively, for carrying out each channel
Environmental noise power value EiCompared with detected value ε；
The channel management module is connected with the output end of first comparator, for obtaining the usable spectrum resource of underwater low interference
It is divided, and generates a threshold value；
Two input terminals of second comparator are connected with the output end of order buffer unit, channel management module respectively, use
It is adjudicated in the size for carrying out all kinds of offsets and threshold value；And
The channel assignment module is connected with the output end of the second comparator, for distributing transmission channel to user node.
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| CN114040026B (en) * | 2021-11-01 | 2023-10-20 | 万申科技股份有限公司 | Industrial Internet of things information security encryption transmission method |
| CN114978357B (en) * | 2022-05-23 | 2023-08-22 | 青岛海讯数字科技有限公司 | Instant circulation and interaction processing method for underwater sound data and computing equipment thereof |
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