CN103369625B - The multi-service being suitable for multiple access access is augmented communication system - Google Patents
The multi-service being suitable for multiple access access is augmented communication system Download PDFInfo
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Abstract
It is applicable to be augmented the multiple access method of communication system, belong to and be augmented communication technology, it is characterised in that be augmented signal by being augmented receiver reception, estimate also to be augmented channel load information according to current, setting is augmented access thresholding, self-adaptative adjustment and optimize current system can address resource.To meet the demand of service priority or service quality, recycling time, frequency, spread spectrum code word and other orthogonal or Multi-attributes in non-orthogonality signal space, it is being augmented the information MAP of signal space by being augmented Mapping implementation transmission information, realize signal transmission finally by being augmented transmitter, power spectral density, the information transmission bandwidth improving communication system, the safety strengthening information and confidentiality can be effectively reduced relative to only using single signal dimension.
Description
Technical field
The present invention relates to wireless communication technology field, be augmented communication multiple access system and method particularly to one.
Background technology
Being augmented multiple access system and method breaches the constraint of single signal Spatial Dimension address, it utilizes time, frequently
Rate, spread spectrum code word and the Multi-attributes of other signal spaces, be mapped to whole by being augmented mapping method by transmission information widely
Individual Multidimensional signal space, relative to only use single signal space can effectively reduce each signal space power spectral density,
Improve the information transmission bandwidth of communication system, strengthen safety and the confidentiality of information simultaneously.
On the one hand, being augmented in multiple access system, its signal bandwidth is far longer than the bandwidth needed for conventional method, works as channel
When there is strong random noise disturbance, it is possible to automatically evade disturbed being augmented address, it is achieved reliably access, surmounted conventional list
The communication immunity mode of one means, has extremely strong capacity of resisting disturbance.On the other hand, by being augmented multiple access method, energy
The priority access enough ensureing high-priority users, the service quality meeting access service, realize high being augmented utilization of resources effect
Rate.
Summary of the invention
The open one of the present invention is augmented communication multiple access system and method.This is augmented communication multiple access system and method
It is characterised by receiving and being augmented signal by being augmented receiver, monitors and estimate current to be augmented channel load information, will be augmented
Channel load information is as being augmented the foundation of access, and dynamic setting is augmented access thresholding, and self-adaptative adjustment current system can be used
Address resource.To meet service priority or QoS requirement as being augmented the criterion of scheduling, dynamic optimized distribution ground
Location resource.Utilize time, frequency, spread spectrum code word and other orthogonal or Multi-attributes in non-orthogonality signal space, reflect by being augmented
Penetrate and realize transmission information and be augmented the information MAP of signal space, at receiving terminal, multiple signal space dimensions are carried out Joint iteration
Decoding, it is achieved Multiuser Detection.
It is a feature of the present invention that and include data receiver part and data transmitting portion, wherein:
Data reception portion is divided and is included: is augmented receiver (101), is augmented iteration decoding module (102) and is augmented channel loading
Estimation module (103), wherein:
It is augmented receiver (101), the signal that is augmented inputted by antenna is being transported to be augmented the same of iterative decoding (102)
Time, periodically extract, add up and export the load information being augmented each dimension of channel, described each dimension refers to the complete of signal space
Portion's dimension SD={T,F,C,Any one dimension in other}, T is the address set of time dimension, and F is the ground of frequency dimension
Location is gathered, and C is the address set of spread spectrum code dimension, and other is the address set of other any dimensions；
It is augmented iteration decoding module (102), receiver input is augmented signal and carries out Joint iteration in multiple dimensions and translate
Code, it is achieved Multiuser Detection, extracts the multiple business data of each user further and exports；
Being augmented channel loading estimation module (103), the load duty cycle of each described dimension obtained by periodic statistics is estimated
Meter is augmented the loading condition of each dimension of channel, estimates taking and residue situation of current address resource further；
Data transmitting portion, including: multi service access module, priority adaptation module (104), it is augmented AM access module
(105), it is augmented scheduler module (106), is augmented mapping block (107) and is augmented transmitter (108), wherein:
Multi service access module, accepts the Multi-service information of user's input,
Priority adaptation module (104), carries out priority the multi-service data received from described multi service access module
Queue up, store the data in different storehouses by different priority, and export the priority query that each business is corresponding,
It is augmented AM access module (105), according to the residue situation of address resource, is adaptively adjusted and is augmented access thresholding, dynamic
State ground selects most preferably to be augmented access window, it is achieved the control to service access process, to this end, from handling capacity, signal to noise ratio and power
Three aspects of spectrum density realize controlling, wherein:
In terms of handling capacity, according to the throughput threshold being augmented each dimension of channel set, self-adaptative adjustment is augmented access
Resource, to ensure the high-throughput of each dimension, if, the handling capacity output thresholding of each dimension
Wherein:
For time domain handling capacity export thresholding, setting value, lower with,
For frequency domain handling capacity export thresholding, setting value, lower with,
For spreading code domain handling capacity output thresholding, setting value, lower same,
The handling capacity output thresholding of any dimension address set in or non-orthogonality signal space orthogonal for other,
Setting value, lower same,
If: be augmented in channel certain dimension and exceeded handling capacity output thresholding, then this dimension address will prohibit the use of；
In terms of signal to noise ratio, according to the signal-noise ratio threshold being augmented each dimension of channel set, self-adaptative adjustment is augmented access
Resource, to ensure that being augmented the satisfied communication system that is augmented of channel each dimension signal to noise ratio retrains, if: it is augmented the signal to noise ratio of each dimension of channel
ThresholdingThen,Wherein:
For time domain signal-noise ratio threshold, setting value, lower with,
For frequency domain signal-noise ratio threshold, setting value, lower with,
For spreading code domain signal-noise ratio threshold, setting value, lower same,
For the signal-noise ratio threshold of other any dimension address sets in orthogonal or non-orthogonality signal space,
If: be augmented channel dimension and exceeded signal-noise ratio threshold, then this dimension address will forbid that user uses；
In terms of power spectrum, according to being augmented the power spectral density thresholding of each dimension of channel, self-adaptative adjustment is augmented access money
Source, it is ensured that the satisfied communication system that is augmented of power spectral density being augmented each dimension of channel retrains, if: it is augmented the power of each dimension of channel
Spectrum density thresholdingWherein:
For time-domain power spectrum density thresholding, setting value, lower with,
For frequency domain power spectrum density thresholding, setting value, lower with,
For spreading code domain power spectrum density thresholding, setting value, lower same,
For the power spectral density door of other any dimension address sets in orthogonal or non-orthogonality signal space
Limit,
If: be augmented in channel certain dimension and exceeded power spectral density thresholding, then this dimension address will forbid that user uses；
The AM access module (105) that is augmented of described data transmitting portion is augmented channel loading according to described data receiver part
The result of estimation module (103) carries out Access Control,
It is augmented scheduler module (106) to use and be augmented the method for scheduling and be augmented what AM access module (105) received etc. to from described
Individual priority query distribution address resource to be sent, the method that this module is used includes based on maximum return being augmented respectively
Dispatching method, based on accumulative control be augmented dispatching method, the quality-of-service based dispatching method that is augmented (includes with maximum delay
With with signal to noise ratio for meeting target), wherein:
Based on maximum return it is augmented dispatching method, P priority team the most tactic for degree of priority
Row, P={1,2 ..., p}, preferential the first priority service data sending p=1, the rest may be inferred by analogy for it,
Being augmented dispatching method based on what accumulation controlled, the residual memory space Packets for P priority query presses excellent
The sequence number of first level queue is arranged as Packets={Packets1,Packets2,...,Packetsp, preferential transmission wherein remains
The priority query Packets that memory space is maximummax=max (Packets),
Meet the quality-of-service based dispatching method that is augmented of maximum delay, select when current time will arrive business
Prolong the upper limitBusiness datum preferentially send,
Wherein subscript " p "
For the sequence number of priority query, subscript " required " represents the time delay needed, and for setting value, subscript " current " expression is arrived
Current time decay time the most,
Meet the quality-of-service based of signal to noise ratio and be augmented dispatching method, according to being respectively augmented the channel loading need to signal to noise ratio
Ask, preferentially one-dimensional for high for current time signal to noise ratio thatAddress money
It is high that current time signal to noise ratio demand is distributed in sourcePreferential
Level queue；
Residing for be augmented scheduler module (106) according to described in be augmented the result of channel loading estimation module (103) and be scheduling,
Residing for be augmented scheduler module (107) according to described in be augmented the result of channel loading estimation module (103) and be scheduling,
Being augmented mapping block (107), employing is augmented mapping method and transmission information is wanted to be augmented information MAP: work as signal space
Whole dimension tables be shown as SD={T, when F, C, other}, the information of suffered same user will be distributed to different signals
On Spatial Dimension, use single time domain address, frequency domain address, spread spectrum code address and other orthogonal or non-orthogonal signal spaces
Address, or when realizing jumping by dimension combination, the change of frequency hopping, frame hopping and other signal space dimensions combine, form single reflecting
Penetrate or combinatorial mapping, then send by being augmented transmitter, described in be augmented mapping block (107) according to described in be augmented channel bear
Carry estimation module (103) result map, meanwhile, from described be augmented scheduler module (106) enter be assigned with address money
Each priority query in source.
Thinking of the present invention is: play the advantage being augmented multiple access system, and the multidimensional making full use of whole signal space is special
Property, by information dispersion to multiple signal space dimensions, improve safety and the confidentiality of information；Use and be augmented multiple access flexibly
Cut-in method, optimized distribution is augmented channel address resource, it is ensured that the priority access of high-priority users and the service quality of business,
There is extremely strong capacity of resisting disturbance simultaneously.
Of the present invention being augmented accesses multiple access system and method, not only includes example described in literary composition, the suitableeest
It is augmented multiple access to communication system and method for other.
Accompanying drawing explanation
Fig. 1 is of the present invention to be augmented communication multiple access system block diagram.
Fig. 2 is of the present invention to be augmented cut-in method flow chart.
Fig. 3 is of the present invention to be augmented dispatching method flow chart.
Fig. 4 is of the present invention to be augmented mapping method schematic diagram.
Detailed description of the invention
With embodiment, the present invention is described in further details below in conjunction with the accompanying drawings.
According to an aspect of the present invention, accompanying drawing 1 provides one to be augmented communication multiple access system.In FIG, it is augmented and connects
Receipts machine (101) receives and is augmented signal, and one side carries out joint iterative decoding by being augmented iterative decoding (102) to multiple dimensions,
Realize Multiuser Detection, extract the multiple business data of each user；On the other hand it is augmented by continuous print, periodically statistics
The duty cycle information of each dimension of channel.It is augmented channel loading and estimates that (103) are estimated according to the duty cycle information being augmented each dimension of channel
Count out the load level being currently augmented each dimension of channel, estimate the situation that takies and the residue feelings of current address resource further
Condition.Access service data are carried out priority queueing by priority adaptive (104), are stored in different by the data of different priorities
In storehouse.Being augmented the access (105) the residue situation according to current address resource, adaptive adjustment accesses thresholding, dynamically adjusts
Assignable address resource.Whole dimension tables of signal space are shown as SD={T, and F, C, other}, T represent time-domain dimension
Address set, F represents the address set of frequency domain dimension, and C represents the address set of spread spectrum code dimension, and it is any that other represents other
The address set of dimension.It is augmented the scheduling (106) residue situation SD according to assignable address resourceremain={ Tremain,
Fremain,Cremain,otherremain, dynamic optimized distribution address resource, it is augmented the function that access capability S is address resource: S
=f (SDremain), the most currently it is augmented the access capability of channel by address resource can be used to determine.It is augmented mapping (107) real
Now transmission information is reflected to time domain, frequency domain, spread spectrum code domain and other orthogonal or single mapping in non-orthogonality signal space or combination
Penetrate, be transmitted by being augmented transmitter (108) the most again.
According to an aspect of the present invention, accompanying drawing 2 provides one to be augmented cut-in method.Due to access customer number amount in system
Being dynamically change, the load being augmented each dimension of channel is also dynamically change, in order to ensure that the height being augmented each dimension of channel gulps down
The amount of telling (or low power spectral density, low signal-to-noise ratio), the use of each dimension address should be less than system access thresholding SDthreshold
={ Tthreshold,Fthreshold,Cthreshold,otherthreshold}.Access door has been occupied over when being augmented in channel certain dimension
Limit, this dimension will no longer allow to access (i.e. this dimension address will forbid that user uses), but other dimensions still can access.
The purpose being augmented cut-in method is not limited to ensure the high-throughput of channel, is augmented system for different, for controlling to be augmented letter
The purposes such as the low power spectral density of each dimension in road, low signal-to-noise ratio are equally applicable.
According to an aspect of the present invention, accompanying drawing 3 provides one to be augmented dispatching method.By using different constraints
With the optimized distribution that allocation criteria carries out address resource, can be formed and multiple be augmented dispatching method, specifically include: receive based on maximum
Beneficial is augmented dispatching method, and the method preferentially sends the business datum that priority is high, it is assumed that priority query includes P={1,
2 ..., p} rank, first send the business datum of the 1st priority during transmission, after front p-1 level business datum is sent, just permit
The business datum being permitted pth priority sends；It is augmented dispatching method, by the residual memory space of service queue based on what accumulation controlled
As sending foundation, it is assumed that the accumulation data of p service queue are Packets={Packets1,Packets2,...,
Packetsp, preferentially send accumulating value maximum Packets when being augmented schedulingmax=max (Packets) (or approach queue storage
The upper limit) queuing data；Based on quality of service guarantee being augmented dispatching method, target is the maximum meeting different business
Postpone TDrequiredDemand or signal to noise ratio snrrequiredDemand, on the one hand according to current business queue
Actual time delayCalculate residue minimum latencyI.e. select i.e. to be up to industry
Business delay boundBusiness datum preferentially send；On the other hand basis is augmented the loading condition of channel, needs signal to noise ratio
Ask highBusiness datum preferentially to distribute signal to noise ratio highAddress resource.In sum, being augmented dispatching method is to utilize ground
Location resources configuration optimization means, maximize priority and the QoS requirement meeting different business, are not restricted to above-mentioned 3 kinds
Concrete grammar.
According to an aspect of the present invention, accompanying drawing 4 provides one to be augmented mapping method.By whole dimension tables of signal space
Being shown as SD={T, F, C, other}, T represent the address set of time-domain dimension, and F represents the address set of frequency domain dimension, and C represents expansion
The address set of frequency code dimension, other represents the address set of other any dimensions, and it is empty that information is dispersed to any of which signal
Between dimension or any dimension combination on, be transmitted by being augmented transmitter the most again.As shown in Figure 4, same user
Information can be distributed on unlike signal Spatial Dimension, single time domain address, frequency domain address, spread spectrum code word ground can be used
Location and other orthogonal or non-orthogonal signal space dimension addresses, it is also possible to when realizing jumping by dimension combination, frequency hopping, frame hopping and
The combination and variation of other signal space dimensions.As being augmented the special case of communication system, when be augmented be reduced to only frequency dimension (or
Other arbitrary single dimensions of person), just become hopping multiple access communication system (or other multi-address communication systems), so the present invention is also
It is applicable to other either signal Spatial Dimensions or the multi-address communication system of arbitrarily dimension combination.
Claims (1)
1. the multi-service being applicable to multiple access access is augmented communication system, it is characterised in that include that data receiver part and data are sent out
Send part, wherein:
Data reception portion is divided and is included: is augmented receiver (101), is augmented iteration decoding module (102) and is augmented channel loading estimation
Module (103), wherein:
It is augmented receiver (101), while being augmented of being inputted by antenna, signal transports to be augmented iterative decoding (102), week
The extraction of phase property, adding up and export the load information being augmented each dimension of channel, described each dimension refers to whole dimensions of signal space
Degree SD={T, any one dimension in F, C, other}, T is the address set of time dimension, and F is the address set of frequency dimension
Closing, C is the address set of spread spectrum code dimension, and other is the address set of other any dimensions；
It is augmented iteration decoding module (102), receiver input is augmented signal and carries out joint iterative decoding in multiple dimensions, real
Existing Multiuser Detection, extracts the multiple business data of each user further and exports；
It is augmented channel loading estimation module (103), by the load duty cycle estimation expansion of each described dimension that periodic statistics obtains
The loading condition of the dimension each dimension of channel, estimates taking and residue situation of current address resource further；
Data transmitting portion, including: multi service access module, priority adaptation module (104), be augmented AM access module (105), expand
Tie up scheduler module (106), be augmented mapping block (107) and be augmented transmitter (108), wherein:
Multi service access module, accepts the Multi-service information of user's input,
Priority adaptation module (104), carries out priority queueing the multi-service data received from described multi service access module,
Store the data in different storehouses by different priority, and export the priority query that each business is corresponding,
It is augmented AM access module (105), according to the residue situation of address resource, is adaptively adjusted and is augmented access thresholding, dynamically
Select most preferably to be augmented access window, it is achieved the control to service access process, to this end, from handling capacity, signal to noise ratio and power spectrum
Spend three aspects to realize controlling, wherein:
In terms of handling capacity, according to the throughput threshold being augmented each dimension of channel set, self-adaptative adjustment is augmented access-in resource,
To ensure the high-throughput of each dimension, if, the handling capacity output thresholding of each dimension
Wherein:
For time domain handling capacity export thresholding, setting value, lower with,
For frequency domain handling capacity export thresholding, setting value, lower with,
For spreading code domain handling capacity output thresholding, setting value, lower same,
In or non-orthogonality signal space orthogonal for other, the handling capacity output thresholding of any dimension address set, sets
Value, lower same,
If: be augmented in channel certain dimension and exceeded handling capacity output thresholding, then this dimension address will prohibit the use of；
In terms of signal to noise ratio, according to the signal-noise ratio threshold being augmented each dimension of channel set, self-adaptative adjustment is augmented access-in resource,
To ensure that being augmented the satisfied communication system that is augmented of channel each dimension signal to noise ratio retrains, if: it is augmented the signal-noise ratio threshold of each dimension of channelThen,Wherein:
For time domain signal-noise ratio threshold, setting value, lower with,
For frequency domain signal-noise ratio threshold, setting value, lower with,
For spreading code domain signal-noise ratio threshold, setting value, lower same,
For the signal-noise ratio threshold of other any dimension address sets in orthogonal or non-orthogonality signal space,
If: be augmented channel dimension and exceeded signal-noise ratio threshold, then this dimension address will forbid that user uses；
In terms of power spectral density, according to being augmented the power spectral density thresholding of each dimension of channel, self-adaptative adjustment is augmented access money
Source, it is ensured that the satisfied communication system that is augmented of power spectral density being augmented each dimension of channel retrains, if: it is augmented the power of each dimension of channel
Spectrum density thresholdingWherein:
For time-domain power spectrum density thresholding, setting value, lower with,
For frequency domain power spectrum density thresholding, setting value, lower with,
For spreading code domain power spectrum density thresholding, setting value, lower same,
For the power spectral density thresholding of other any dimension address sets in orthogonal or non-orthogonality signal space,
If: be augmented in channel certain dimension and exceeded power spectral density thresholding, then this dimension address will forbid that user uses；
The AM access module (105) that is augmented of described data transmitting portion is estimated according to the channel loading that is augmented of described data receiver part
The result of module (103) carries out Access Control,
It is augmented scheduler module (106) to use and be augmented the method for scheduling to be augmented what AM access module (105) received etc. pending from described
The individual priority query distribution address resource sent, the method that this module is used includes the scheduling of being augmented based on maximum return respectively
Method, based on accumulative control be augmented dispatching method, quality-of-service based be augmented dispatching method (include with maximum delay and
With signal to noise ratio for meeting target), wherein:
Based on maximum return it is augmented dispatching method, P priority query the most tactic for degree of priority, P
=1,2 ..., and p}, preferential the first priority service data sending p=1, the rest may be inferred by analogy for it,
The method being augmented scheduling controlled based on accumulation, the residual memory space Packets for P priority query presses preferential
The sequence number of level queue is arranged as Packets={Packets1,Packets2,...,Packetsp, the preferential wherein residue that sends is deposited
The priority query Packets that storage space is maximummax=max (Packets),
Meet the quality-of-service based dispatching method that is augmented of maximum delay, select will arrive on service delay at current time
LimitBusiness datum preferentially send,
Wherein subscript " p " is
The sequence number of priority query, subscript " required " represents the time delay needed, and for setting value, subscript " current " represents to working as
Decay time the most of front moment,
Meet the quality-of-service based of signal to noise ratio and be augmented dispatching method, according to being respectively augmented the channel loading demand to signal to noise ratio,
Preferentially one-dimensional for high for current time signal to noise ratio thatAddress resource
Distribute to current time signal to noise ratio demand highPriority
Queue；
Residing for be augmented scheduler module (106) according to described in be augmented the result of channel loading estimation module (103) and be scheduling,
Being augmented mapping block (107), employing is augmented mapping method and transmission information is wanted to be augmented information MAP: when signal space
All dimension table is shown as SD={T, and when F, C, other}, the information of suffered same user is empty by being distributed to different signals
Between in dimension, use single time domain address, frequency domain address, spread spectrum code address and other orthogonal or non-orthogonal signal spaces ground
Location, or when realizing jumping by dimension combination, the change of frequency hopping, frame hopping and other signal space dimensions combine, form single mapping
Or combinatorial mapping, then send by being augmented transmitter, described in be augmented mapping block (107) according to described in be augmented channel loading
The result of estimation module (103) maps, meanwhile, from described be augmented scheduler module (106) enter be assigned with address resource
Each priority query.
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| CN105978661B (en) * | 2016-05-09 | 2018-04-10 | 清华大学 | Iterative detection decoding method and device in a kind of frequency hopping communications |
| CN106998308B (en) * | 2017-03-09 | 2020-02-18 | 清华大学 | Code hopping transmission method in sparse code multiple access based on time-varying codebook |
| EP3767922B1 (en) * | 2019-07-17 | 2023-11-08 | ABB Schweiz AG | Method of channel mapping in an industrial process control system |
| CN110855593B (en) * | 2019-10-29 | 2021-01-15 | 北京邮电大学 | Downlink communication method of single-code cyclic shift multiple access system |
| CN113784390B (en) * | 2021-09-13 | 2024-01-30 | 中国航空无线电电子研究所 | Wireless communication system for realizing dynamic distribution of network load |
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