CN106912111A - A kind of non-orthogonal multiple cut-in method merged with competition fine granularity based on scheduling - Google Patents
A kind of non-orthogonal multiple cut-in method merged with competition fine granularity based on scheduling Download PDFInfo
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Abstract
The invention provides a kind of non-orthogonal multiple cut-in method merged with competition fine granularity based on scheduling,It is related to communication technical field,Calculate the resource area and resource location occupied by scheduling competition fusion access way,And be scheduling user resource allocation,Centroid sends resource distribution instruction frame to the user equipment of this cell,And accessed by dispatching competition fusion,Final scheduling user and competition user's transmitted information are superimposed on running time-frequency resource,Receiving terminal is parsed overlapped information by multiuser detection mode,The present invention is by the method using the shared identical frequency spectrum resource of scheduling access and contention access,Realize two kinds of fine granularity fusions of access way,Be conducive to the demand of dynamic change and matching for resource,Be conducive to multi-user diversity gain,And then it is obviously improved network capacity,The availability of frequency spectrum and service quality.
Description
Technical field
The present invention relates to communication technical field, especially a kind of non-orthogonal multiple cut-in method.
Background technology
In recent years, with mobile radio telecommunications technology and the high speed development of computer science, mobile Internet is just far-reaching
Affect the working and learning of people, and continue to be permeated to every field.Multiple access technique is used as mobile radio telecommunications skill
The core of art, is also called medium access control (Media access Control, MAC), and it is responsible for multiple user equipment (User
Equipment, UE) how efficiently to share and use increasingly deficient radio spectrum resources.Therefore, MAC technologies it is efficient with
The no Key Performance Indicator (Key Performance Indicator, KPI) for directly influencing mobile wireless network：Network holds
Amount, number of network connections and the availability of frequency spectrum.
Mobile wireless network of future generation needs to meet mass users connection, the demand of ultra-large portfolio, and this is to tradition
Wireless network brings great challenge, therefore, industry be devoted to seeking being obviously improved user's connection number, network capacity and
The technology of the availability of frequency spectrum.In recent years, with Sparse Code multiple access (Sparse Code Multiple Access, SCMA) for representative
Non-orthogonal multiple access technology different user equipmenies can be made to share same spectrum resources, i.e. resource is no longer exclusive.
It is thus possible to be obviously improved user's connection number, network capacity and the availability of frequency spectrum on the premise of limited spectrum resources, enjoy
Industrial quarters and the favor of academia, are expected to be used by the standardization of the 5th Generation Mobile Communication System (5G).On non-orthogonal multiple skill
Art may be referred to " Dai L, Wang B, Yuan Y, et al.Non-orthogonal multiple access for 5G:
solutions,challenges,opportunities,and future research trends[J].IEEE
Communications Magazine,2015,53(9):74-81.”。
From for the main body and mode for accessing, multiple access technique can be generally divided into two classes：1) multiple access based on scheduling
Access technology, is commonly applied to Cellular Networks, it is advantageous that the use between user to resource does not conflict, resource can be obtained more
Good optimization distribution, transmission rate requirements are easier to be ensured；Its deficiency is to need center control nodes flexibility ratio not high,
Real-time ensuring technology is poor, and signaling consumption is larger；2) multiple access technique based on random competition, is commonly applied to WLAN,
It is advantageous that flexible robust, preferably, realization is simple for Real-time Ability；It is disadvantageous in that between the packet of multiple users
Conflict may be sent, transmission rate requirements are difficult to be ensured well.For convenience, hereinafter respectively by based on scheduling
Multiple access technique and the multiple access technique based on random competition are referred to as scheduling and access and contention access, will not cause discrimination
Justice.
“Au K,Zhang L,Nikopour H,et al.Uplink contention based SCMA for 5G
radio access[C]//Globecom Workshops(GC Wkshps),2014.IEEE,2014:900-905. " is proposed will
It is incorporated into simultaneously in the access of SCMA uplink multi-address based on the access way dispatched and the access way based on competition, however, the think of
Scheduling is independent and isolated with the frequency spectrum resource occupied by competition in road, i.e., a part of frequency spectrum resource is used for scheduling and accesses, separately
A part of frequency spectrum resource is used for contention access, is strictly disjointed between this two parts resource, is overlapped without any frequency spectrum resource mutually.
This can bring following defect：1) it is dynamic change using scheduling access and using the demand of the user equipment of contention access, sternly
The available resources segmentation of two kinds of access ways can be caused dynamic user's request and available resources number to mismatch by lattice, so as to can make
Into the wasting of resources and the problem of conflict aggravation；2) strictly will dispatch to access and can cause user equipment with the resource separation of contention access
Available number of resources is reduced, i.e., the user for being accessed using scheduling cannot be using the resource of contention access, and vice versa, so that multiplex
Family diversity ability is affected.
In sum, existing non-orthogonal multiple technology introduces scheduling and accesses and contention access mode, but two kinds of accesses
The available resources segmentation of mode can limit network capacity, the availability of frequency spectrum and service quality (Quality of Service,
QoS), the multiple access method of more fine and efficient fusion scheduling access and contention access is lacked.
The content of the invention
In order to overcome the deficiencies in the prior art, prior art restriction network capacity, the availability of frequency spectrum and service quality are solved
Problem, the present invention propose it is a kind of based on scheduling with compete the non-orthogonal multiple cut-in method that merges of fine granularity, the method is not
Isolate for dispatching the resource of the resource and user's contention access for accessing, and cause that two kinds of resources of access way are shared completely,
While a part of user equipment of scheduling is transmitted, it is allowed to which other users equipment is on same frequency spectrum resource using random
The mode of competition is accessed, and so as to be conducive to the demand of dynamic change and matching for resource, is conducive to multi-user diversity gain, and then
It is obviously improved network capacity, the availability of frequency spectrum and service quality.
The detailed step of the technical solution adopted for the present invention to solve the technical problems is as follows：
Step 1：Resource allocation phase
Centroid in wireless network calculates the resource area and resource occupied by scheduling-competition fusion access way
Position, and be scheduling user resource allocation in above-mentioned resource area, it is transferred to step 2；
The Centroid refers to base station (Base Station, BS) in Cellular Networks, refers in a wireless local area network nothing
Line access point (Access Point, AP)；
The resource refers to time frequency two-dimensional resources, and resource size is weighed by the quantity of temporal frequency Resource Block, resource location by
I-th j-th frequency cells of time slot determines；
Step 2：Resource indicates the stage
Step 2.1：Centroid sends resource distribution instruction frame (Resource to the user equipment of this cell
Allocation Indication Frame, RAIF)；
Step 2.2：This cell scheduling-competition is indicated to merge the resource location of access way, specific indicating mode in RAIF
For i-th time slot, j-th frequency is used to dispatching-competing fusion access way, indicated resource location scheduled user and competing
Strive users to share；
Step 2.3：RAIF indicates resource point in the resource location of scheduling-competition fusion access way to dispatch user
With position, specific indicating mode is that j-th frequency of i-th time slot is distributed into user equipment u, is transferred to step 3；
Step 3：Scheduling-competition fusion is accessed
Step 3.1：Scheduled user equipment is realized up in scheduled resource location using non-orthogonal multiple technology
Access；
Step 3.2：Contention access user performs random competition in the resource location of scheduling-competition fusion access way, such as
Fruit competes successfully, then realize multi-upstream access using non-orthogonal multiple technology；If competition failure, this access is abandoned；
The mode of the random competition includes but are not limited to the mode of keeping out of the way and p probabilistic manners；
Step 3.3：Scheduling user in step 3.1 and 3.2 and competition user are transmitted by shared identical running time-frequency resource
Information be superimposed on these shared running time-frequency resources, into step 4；
Step 4：Receiver user's separation phase
Receiving terminal by multiuser detection mode by the information analysis of the multiple users being superimposed out, flow
Terminate.
Receiver user's separation phase of the non-orthogonal multiple cut-in method merged with competition fine granularity based on scheduling
SCMA methods are such as used, then the information analysis step of BS receiving terminals is as follows：
Step a)：The corresponding original code book of all scheduled user equipmenies is constituted into certainty codebook set, the set
Not only code book, it is known that and code book is necessarily active, described refers to actively to certainly exist user to use the code book to send data, is transferred to step
Suddenly b)；
Step b)：The corresponding original code book of each competition user is increased into a constellation point (0,0), referred to as incremental code
This, and the increment code book of all competition users is constituted into activity codebook set to be determined, code book in the set is, it is known that still live
Jump property do not know, be transferred to step c)；
Step c)：Certainty codebook set and activity codebook set to be determined are collectively formed into SCMA and receives code book collection
Close, Multiuser Detection is then realized using Message Passing Algorithm, if the code book constellation for ruling out is (0,0), then judge
It is inactive, otherwise, it is determined that being active, flow terminates.
The method that identical frequency spectrum resource is shared with contention access is accessed the beneficial effects of the invention are as follows by using scheduling,
Two kinds of fine granularity fusions of access way are realized, is conducive to the demand of dynamic change and matching for resource, be conducive to multi-user
Diversity gain, and then it is obviously improved network capacity, the availability of frequency spectrum and service quality.
Brief description of the drawings
Fig. 1 is the structure chart of the embodiment of the present invention one.
Fig. 2 is the structure chart of the embodiment of the present invention one.
Fig. 3 is the structure chart of the embodiment of the present invention two.
Fig. 4 is the structure chart of the embodiment of the present invention three.
Fig. 5 is the structure chart of the embodiment of the present invention four.
Fig. 6 is the structure chart of the embodiment of the present invention five.
Fig. 7 is the structure chart of the embodiment of the present invention six.
Fig. 8 is the structure chart of the embodiment of the present invention seven.
Fig. 9 is the structure chart of the embodiment of the present invention eight.
STA refers to website (Station) in figure, and IDMA refers to that intertexture point multiple access accesses (Interleave-Division
Multiple Access)。
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Specific embodiment one
As shown in figure 1, embodiment side retrace state implement in the Cellular Networks based on SCMA it is proposed by the present invention scheduling with
Competition fine granularity fusion method, to ensure compatibility, the wireless frame structure of the embodiment follows forth generation GSM
The specification of (4G).
Step 1：Each radio frames start time dispatching cycle, BS sets uplink and downlink timeslot proportioning first, is transferred to step
2；
Step 2：The running time-frequency resource occupied required for access way is merged in scheduling-competition during BS calculates ascending time slot
(Resource Block, RB) position, and be the user equipment allocation up RB being scheduled, its allocated RB with dispatch-it is competing
Strive the RB shared by fusion access way to overlap, be transferred to step 3；
Step 3：BS passes through Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH)
Broadcast resource allocation result, indicates the RB positions occupied by scheduling-competition fusion access way, and indicate scheduled user to set
Standby RB resources, the user for being scheduled is transferred to step 4, and for contention access, user is transferred to step 5；
Step 4：Scheduled user equipment sends data according to the RB resources distributed by SCMA modes, is transferred to step
6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, then randomly choose SCMA a layer be made up of some RB, sends data by SCMA modes, and be transferred to step 6；
If selection is not accessed, this transmission opportunity is abandoned, this flow terminates；
The Probability p is set by base station periodically by descending control signaling；
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, using the side of multiuser detection
Formula isolates the information of each uplink user, and flow terminates.
Fig. 2 describes the BS receivers design of embodiment one, in embodiment one, scheduling-competition fusion access way correspondence
RB resources, both distributed to a part scheduling user, distribute to again a part competition user, scheduling user's code book be it is active and
Know, and compete the code book active degree of user and be unaware of, therefore, BS needs to set two class users from the signal of superposition
Standby Signal separator is out.
Step a)：The corresponding original code book of all scheduled user equipmenies is constituted into certainty codebook set, the set
Not only code book, it is known that and code book is necessarily active, described refers to actively to certainly exist user to use the code book to send data, is transferred to step
Suddenly b)；
Step b)：The corresponding original code book of each competition user is increased into a constellation point (0,0), referred to as incremental code
This, and the increment code book of all competition users is constituted into activity codebook set to be determined, code book in the set is, it is known that still live
Jump property do not know, be transferred to step c)；
Step c)：Certainty codebook set and activity codebook set to be determined are collectively formed into SCMA and receives code book collection
Close, Multiuser Detection is then realized using Message Passing Algorithm, if the code book constellation for ruling out is (0,0), then judge
It is inactive, otherwise, it is determined that being active.Flow terminates.
Specific embodiment two
As shown in figure 3, embodiment two is based on the implementation of embodiment one, difference is that embodiment three introduces up-downgoing
Full duplex technology, therefore, in embodiment three, uplink scheduling, descending scheduling and competition users to share identical RB resources.
Step 1：Each radio frames start time dispatching cycle, BS sets uplink and downlink timeslot proportioning first, is transferred to step
2；
Step 2：BS calculates scheduling-RB positions for occupying required for competition fusion access way in ascending time slot, and be by
The user equipment allocation up RB and descending RB of scheduling, its allocated RB merges the RB shared by access way with scheduling-competition
Overlap, and be transferred to step 3；
Step 3：BS indicates the RB occupied by scheduling-competition fusion access way by PDCCH broadcast resource allocation results
Position, and the RB resources of scheduled user equipment are indicated, the user for being scheduled is transferred to step 4, is used for contention access
Family is transferred to step 5；
Step 4：Scheduled user equipment according to the RB resources distributed by SCMA mode transceiving datas, wherein dispatching
Uplink user send data, the downlink user of scheduling receives the data from BS, is transferred to step 6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, then randomly choose SCMA a layer be made up of some RB, and data are sent by SCMA modes, is transferred to step 6；Such as
Fruit selection is not accessed, then abandon this transmission opportunity, and this flow terminates；
The Probability p is set by base station by descending control signaling.
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, using the side of multiuser detection
Formula isolates the information of each uplink user, and user equipment is adopted from the scheduling user and competition subscriber signal that are superimposed
Downlink information required for isolating itself with the mode of multiuser detection, flow terminates.
Specific embodiment three
As shown in figure 4, embodiment three stresses description based on power non-orthogonal multiple NOMA (Non-orthogonal
Multiple Access) Cellular Networks in implement it is proposed by the present invention scheduling with competition fine granularity fusion method.
Step 1：For identical time slot, frequency and spatial flow, BS divides resources into N number of power layer from power domain
(Power Layer) sends upstream data and uses for multiple user equipmenies, the different transmit power of each power layer correspondence, so
After be transferred to step 2；
Step 2：A portion power layer is directly scheduled to corresponding uplink user and set by BS by descending control signaling
It is standby, it is transferred to step 3.
Step 3：The subset power layer of dump power layer in step 2 is distributed to contention access by BS by descending control signaling
Uplink user equipment, the user for being scheduled is transferred to step 4, and for contention access, user is transferred to step 5；
Step 4：Power of the scheduled user equipment according to required by the power layer distributed sends upstream data, is transferred to
Step 6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, then randomly choose one and can be used for the power layer for competing, and is sent according to the power required by selected power layer
Row data, are transferred to step 6；If selection is not accessed, this transmission opportunity is abandoned, this flow terminates.
The Probability p is set by base station by descending control signaling；
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, using the side of multiuser detection
Formula isolates the information of each user, and flow terminates.
Specific embodiment four
As shown in figure 5, example IV is based on the implementation of embodiment three, difference is that the introducing up-downgoing of embodiment five is complete
Duplex technology, therefore, in example IV, uplink scheduling, descending scheduling and competition users to share identical RB resources.
Step 1：For identical time slot, frequency and spatial flow, BS divides resources into N number of power layer from power domain
(Power Layer), is transferred to step 2；
Step 2：A portion power layer is directly scheduled to corresponding uplink user and is set by BS by descending control signaling
It is standby, a part of layer in dump power layer is directly also scheduled to corresponding downlink user equipment, it is transferred to step 3；
Step 3：BS will distribute to the son of dump power layer after uplink and downlink by descending control signaling in step 2
Collection power layer distributes to contention access user equipment, and the user for being scheduled is transferred to step 4, and for contention access, user is transferred to
Step 5；
Step 4：Power of the scheduled uplink user equipment according to required by the power layer distributed sends upstream data；
The downlink data to be received such as scheduled downlink user equipment, is transferred to step 6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, then randomly choose one and can be used for the power layer for competing, and sends up according to the power required by selected power layer
Data, are transferred to step 6；If selection is not accessed, this transmission opportunity is abandoned, this flow terminates.
The Probability p is set by base station by descending control signaling；
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, using the side of multiuser detection
Formula isolates the information of each uplink user, and user equipment is adopted from the scheduling user and competition subscriber signal that are superimposed
Downlink information required for isolating itself with the mode of multiuser detection, flow terminates.
Specific embodiment five
As shown in fig. 6, embodiment five stresses description implements proposed by the present invention in the WLAN net based on SCMA
Scheduling and competition fine granularity fusion method, to ensure compatibility, the wireless frame structure of embodiment six follows IEEE802.11ax's
Specification.
Step 1：Whenever AP send trigger frame (Trigger Frame, TF) when, first according to dispatching algorithm calculate scheduling-
Running time-frequency resource unit (Resource Unit, the RU) position occupied required for competition fusion access way, and be the use being scheduled
Family equipment distributes up RU, and its allocated RU is Chong Die with the RU shared by scheduling-competition fusion access way, is transferred to step 2；
Step 2：BS sends TF frame broadcast resource allocation results, indicates the RU occupied by scheduling-competition fusion access way
Position, and the RU resources of scheduled user equipment are indicated, the user for being scheduled is transferred to step 3, is used for contention access
Family is transferred to step 4；
Step 3：Scheduled user equipment sends data according to the RU resources distributed by SCMA modes, is transferred to step
5；
Step 4：Contention access user equipment determines whether this TF accesses based on back off strategy, if selection is accessed,
One SCMA layer be made up of some RU of random selection, data are sent by SCMA modes, are transferred to step 5；If selection does not connect
Enter, then abandon this transmission opportunity, this flow terminates.
Step 5：AP from the scheduling user that is superimposed and competition subscriber signal, using the side of multiuser detection
Formula isolates the information of each uplink user, and flow terminates.
Specific embodiment six
As shown in fig. 7, embodiment six stresses description is accessing (Multi-User Shared based on multiple users share
Access, MUSA) Cellular Networks in implement it is proposed by the present invention scheduling with competition fine granularity fusion method.
Step 1：There is a corresponding complex field multi-element code sequence using each user equipment of MUSA access ways
Row are corresponded to therewith, are transferred to step 2,
The corresponding complex field multi-element code sequence of the user equipment is obtained using one of following two ways：
Mode 1：BS is that user equipment assigns complex field multi-element code sequence by downlink signaling；
Mode 2：User equipment itself uniquely binds a complex field multi-element code sequence；
Step 2：BS carries out uplink by descending control signaling by a part of user is dispatched, and BS is transferred to step 3, is adjusted
The user equipment of degree is transferred to step 4；
Step 3：BS triggers Stochastic accessing user and carries out Stochastic accessing by descending control signaling, and BS is transferred to step 6, at random
Access user equipment is transferred to step 5；
Step 4：Scheduled user equipment is extended spectrum modulation and transmits using itself corresponding complex field multi-element code
Upstream data, is transferred to step 6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, then be extended spectrum modulation transmission upstream data using itself corresponding complex field multi-element code, and which is row
Industry is known, and is transferred to step 6；If selection is not accessed, this transmission opportunity is abandoned, this flow terminates.
The Probability p is set by base station by descending control signaling；
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, by the way of serial interference elimination
The information of each user is isolated, flow terminates.
Specific embodiment seven
As shown in figure 8, embodiment heptalateral retraces to state is accessing (Pattern-Division based on pattern segmentation multiple access
Multiple Access, PDMA) Cellular Networks in implement it is proposed by the present invention scheduling with competition fine granularity fusion method.
Step 1：Base station is pre-configured with PDMA multi-user coding matrix Hs by way of downlink signalingPDMA, multi-user coding
Matrix and generalized channel matrix HCHMultiplication forms equivalent channel transfer matrix H, is transferred to step 2；
The PDMA multi-user codings matrix HPDMAFor M rows N is arranged, wherein, HPDMARow set represent a kind of resource dimension,
Including one or more in spatial domain dimension, encoding domain dimension and power domain dimension, correspondence resource dimension per a line
In a Resource Unit, HPDMARow collection table levy user equipment, one user equipment of each row correspondence；Each element
Value is 1 or 0, uses the corresponding resource of the row to send data wherein taking 1 and representing the corresponding user of the row, takes 0 and represents the row
Corresponding user does not use the corresponding resource of the row to send data；
Step 2：BS dispatches a part of user and carries out uplink by descending control signaling, and BS is transferred to step 3, is scheduled
User equipment be transferred to step 4；
Step 3：BS triggers Stochastic accessing user and carries out Stochastic accessing by descending control signaling, and BS is transferred to step 6, at random
Access user equipment is transferred to step 5；
Step 4：Scheduled user equipment is based on the money that value in itself column in PDMA multi-user coding matrixes is 1
Transmitting uplink data is carried out on source unit, which is known for industry, is transferred to step 6；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection access, user equipment be based on PDMA multi-user codings matrix itself respective column in value be 1 Resource Unit on carry out
Row data transfer, which is known for industry, is transferred to step 6；If selection is not accessed, this transmission opportunity, this stream is abandoned
Journey terminates.
The Probability p is set by base station by descending control signaling；
Step 6：BS from the scheduling user that is superimposed and competition subscriber signal, using front-end detection and serial interference
The mode of elimination isolates the information of each user, and flow terminates.
Specific embodiment eight
As shown in figure 9, embodiment eight stresses description is accessing (Interleave-Division based on point multiple access that interweaves
Multiple Access, IDMA) Cellular Networks in implement it is proposed by the present invention scheduling with competition fine granularity fusion method.
Step 1：Each user equipment has a unique corresponding interleaved sequence, IDMA systems be based on the interleaved sequence come
Different user equipmenies are distinguished, step 2 is transferred to；
The interleaved sequence has following 3 kinds of modes：
Mode 1：It is the unique interleaved sequence of each user equipment allocation by base station；
Mode 2：Each user equipment has uniquely determined an interleaved sequence for static state；
Mode 3：The interleaved sequence of each user equipment sets with time change at random, but the interleaved sequence of base station with user
Standby interleaved sequence change is consistent；
Step 2：BS dispatches a part of user and carries out uplink by descending control signaling, is transferred to step 3；
Step 3：BS triggers Stochastic accessing user and carries out Stochastic accessing by descending control signaling, is transferred to step 4.
Step 4：The data of scheduled user equipment first pass around universaling coder, then by the intertexture of its own
Device, is then sent in communication channel through ovennodulation, and which is known for industry, is transferred to step 6；
The universaling coder has following three kinds of forms：
Form 1：Only one forward error correction device；
Form 2：Only one frequency multiplier；
Form 3：First pass through forward error correction, after by frequency multiplier；
Step 5：Contention access user equipment selects to access according to Probability p, is not accessed according to (1-p) probability selection, if
Selection is accessed, and the data of user equipment first pass around universaling coder, then by the interleaver of its own, then through ovennodulation
It is sent in communication channel, which is known for industry, is transferred to step 6；If selection is not accessed, this conveyer is abandoned
Meeting, this flow terminates.
The Probability p is set by base station by descending control signaling；
Step 6：BS is divided from the scheduling user and competition subscriber signal that are superimposed using chip-level iterative decoder
The information of each user is separated out, flow terminates.
Claims (2)
1. it is a kind of based on scheduling with compete the non-orthogonal multiple cut-in method that merges of fine granularity, it is characterised in that including following steps
Suddenly：
Step 1：Resource allocation phase
Centroid in wireless network calculates the resource area and resource-niche occupied by scheduling-competition fusion access way
Put, and be scheduling user resource allocation in above-mentioned resource area, be transferred to step 2；
The Centroid refers to base station in Cellular Networks, refers in a wireless local area network WAP；
The resource refers to time frequency two-dimensional resources, and resource size is weighed by the quantity of temporal frequency Resource Block, and resource location is by i-th
J-th frequency cells of time slot determine；
Step 2：Resource indicates the stage
Step 2.1：Centroid sends resource distribution instruction frame to the user equipment of this cell；
Step 2.2：This cell scheduling-competition is indicated to merge the resource location of access way in RAIF, specific indicating mode is i-th
J-th frequency of individual time slot is used to dispatching-competing fusion access way, indicated resource location scheduled user and competition user
It is shared；
Step 2.3：RAIF is scheduling user's instruction resource allocation position in the resource location of scheduling-competition fusion access way
Put, specific indicating mode is that j-th frequency of i-th time slot is distributed into user equipment u, is transferred to step 3；
Step 3：Scheduling-competition fusion is accessed
Step 3.1：Scheduled user equipment realizes multi-upstream access in scheduled resource location using non-orthogonal multiple technology；
Step 3.2：Contention access user performs random competition in the resource location of scheduling-competition fusion access way, if competing
Strive successfully, then multi-upstream access is realized using non-orthogonal multiple technology；If competition failure, this access is abandoned；
The mode of the random competition includes but are not limited to the mode of keeping out of the way and p probabilistic manners；
Step 3.3：Scheduling user in step 3.1 and 3.2 and competition user are by shared identical running time-frequency resource, transmitted letter
Breath is superimposed on these shared running time-frequency resources, into step 4；
Step 4：Receiver user's separation phase
Receiving terminal by multiuser detection mode by the information analysis of the multiple users being superimposed out, flow knot
Beam.
2. it is according to claim 1 based on scheduling with compete the non-orthogonal multiple cut-in method that merges of fine granularity, its feature
It is to be adopted with the receiver user's separation phase for competing the non-orthogonal multiple cut-in method that fine granularity is merged based on scheduling as described
SCMA methods are used, then the information analysis of BS receiving terminals comprise the steps：
Step a)：The corresponding original code book of all scheduled user equipmenies is constituted into certainty codebook set, the set is not only
Code book, it is known that and code book is necessarily active, described refers to actively to certainly exist user to use the code book to send data, is transferred to step
b)；
Step b)：The corresponding original code book of each competition user is increased into a constellation point (0,0), referred to as increment code book, and
The increment code books of all competition users are constituted into activity codebook sets to be determined, code book in the set, it is known that still activity
Do not know, be transferred to step c)；
Step c)：Certainty codebook set and activity codebook set to be determined are collectively formed into SCMA and receives codebook set, and
Multiuser Detection is realized using Message Passing Algorithm afterwards, if the code book constellation for ruling out is (0,0), is then judged to non-live
Jump, otherwise, it is determined that being active, flow terminates.
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| PCT/CN2017/107772 WO2018176824A1 (en) | 2017-04-01 | 2017-10-26 | Non-orthogonal multiple access method based on scheduling and competition fine-grained fusion |
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| WO2018176824A1 (en) * | 2017-04-01 | 2018-10-04 | 西北工业大学 | Non-orthogonal multiple access method based on scheduling and competition fine-grained fusion |
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