CN108990015A - Business scheduling method and device under a kind of rail traffic redundant communication system - Google Patents
Business scheduling method and device under a kind of rail traffic redundant communication system Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0018—Communication with or on the vehicle or train
- B61L15/0027—Radio-based, e.g. using GSM-R
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L2205/00—Communication or navigation systems for railway traffic
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- Aviation & Aerospace Engineering (AREA)
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Abstract
The present invention proposes the business scheduling method and device under a kind of rail traffic redundant communication system, base station maintenance local area UE presence information and real-time informing are to all neighbor base stations, situation is resident according to local area and the vehicle-mounted UE in adjacent area and determines base station radio-frequency operating mode in base station, the base station radio-frequency operating mode is interference measurement mode or normal mode of operation, when base station is interference measurement mode, base station receiver configuration frequency point and bandwidth measure, it counts all RB in bandwidth and interferes ratio, RB interference ratio cycle is reported into service server；Service server carries out the adjustment of traffic scheduling strategy according to the interference result received；When base station radio frequency module is normal mode of operation, service server and base station carry out traffic scheduling according to newest scheduling strategy for vehicle-mounted UE.The present invention passes through the adjustment of traffic scheduling strategy, and traffic scheduling is allowed to adapt to various interference environments as far as possible, avoids influencing user experience, is a kind of efficient dispatching method.
Description
Technical field
The present invention relates to rail traffic wireless communication technology fields, more particularly it relates to which one kind is in rail traffic
The technical solution of traffic scheduling under redundant communication system.
Background technique
City Rail Transit System has freight volume as the important means and effective measures for solving the problems, such as city traffic
Greatly, the advantages that speed is fast, safe, punctual, comfortable, and urban land resource comprehensive development and utilization can be driven, to the long-range hair in city
Exhibition is of great significance.Meanwhile as Information and Communication Technology is to broadband rapid development, the need of rail traffic informatization
Ask also constantly promotion.Rail transit field wireless communication system is mainly used for arranging as the critical system of rail traffic informationization
Two-way, stable, reliable, high speed wireless data transmission channel is established between vehicle and ground, other business provide for rail traffic
Basic bearer network.System is mainly made of base station and onboard subsystem two parts.Referring to Fig. 1, there are two vehicle-mounted UE on train, often
Also there are two wireless base stations for a arrangement of base stations point, this is a kind of AB Double coverage scheme generally used, and two net work are in difference
Two frequency ranges, Double redundancy backup is provided, will not be interfered with each other.UE A access base station A, UE B access base station B, A net signal is to B
The transmitted in both directions of net will not impact, and equally, B net signal will not impact A net transmitted in both directions.
Current track traffic vehicle-ground wireless communication system has more and more used LTE as air interface transmission technology,
Carrying out communication with LTE in field of track traffic is a newer radio communication system, and the broadband that LTE can provide high speed connects
It connects, single base station range maximum is up to 48km.LTE using cell mobile communication systems, rail traffic communication network by
Several base stations composition.When LTE Technology application is when AB Double coverage scheme, A net and B net are all technologies of being eated dishes without rice or wine using LTE, point
Other stand-alone service is in UE A and UE B.
According to national regulation, frequency range used in track transportation industry is 1785~1805MHZ, but the frequency range is simultaneously
It is not to be independently supplied track transportation industry use, other private networks include that the fields such as government affairs, electric power, airport, petrochemical industry, education can be all total to
With this frequency band.If do not planned random use, then interference problem will be very serious, even if unified in advance carry out band plan
Interference problem can be temporarily solved with distribution, but private network is to be filled with variation in use by every profession and trade independent operation after all
And randomness.Interference is difficult to completely eliminate, and in different time, different location, disturbed condition all can be different.Rail traffic communication
Network in the case, inevitably will receive influence, and in different time, different location, on different frequency bands, suffered is dry
It is different for disturbing situation all.
Under different disturbance regimes, the portfolio that network can be supported is different, can in the case where interfering small
It supports more business, and can only just meet most important business in the case where serious interference.If in all situations
The scheme of lower traffic scheduling is all unalterable, then business is obviously unable to satisfy demand under the scene having, so if to protect
Card rail traffic business datum can be normally carried out under different interference environments, not interfere with the business experience of user, that
A kind of method and apparatus with regard to needing to propose new traffic scheduling.
Summary of the invention
Present invention solves the technical problem that being eliminated by self-adapted service scheduling more under LTE rail traffic scene
Influence of the interference environment of change to service feature.
The present invention provides the business scheduling method under a kind of rail traffic redundant communication system, and base station maintenance local area UE is resident
Information simultaneously be resident situation according to local area and the vehicle-mounted UE in adjacent area and determine that base station radio-frequency works by real-time informing to all neighbor base stations, base station
Mode, the base station radio-frequency operating mode be interference measurement mode or normal mode of operation,
When base station is interference measurement mode, base station receiver configuration frequency point and bandwidth are measured, and count institute in bandwidth
There is RB to interfere ratio, RB interference ratio cycle is reported into service server；Service server is according to the interference result received
Carry out the adjustment of traffic scheduling strategy；
When base station radio frequency module is normal mode of operation, service server and base station according to newest scheduling strategy come for
Vehicle-mounted UE carries out traffic scheduling.
Moreover, base station is resident the implementation that situation determines base station radio-frequency operating mode according to local area and the vehicle-mounted UE in adjacent area
For when base station affiliated subdistrict and its all adjacent cell all resident, radio-frequency module starting interference measurement works of base station without vehicle-mounted UE
Operation mode；When base station affiliated subdistrict or its any adjacent area have UE resident, the radio-frequency module of base station is switched to normal mode of operation.
Moreover, the implementation of all RB interference ratios is to be divided into Whole frequency band according to band width configuration and subframe in bandwidth
The energy value on each RB is calculated in multiple resource block RB, and root interferes RB for RB points and do not interfere in preset threshold value TH
RB realizes that all RB interfere ratio in statistics bandwidth.
Moreover, service server carries out the adjustment of traffic scheduling strategy according to the interference result received, it is included in the bis- nets of AB
Under covering scheme, RB interference ratio is netted according to A and B net RB interference proportion composite carries out the adjustment of traffic scheduling strategy.
The present invention provides the traffic scheduling device under a kind of rail traffic redundant communication system, comprises the following modules,
Judgment module, for enabling base station maintenance local area UE presence information, simultaneously real-time informing is to all neighbor base stations, according to this
Area and the vehicle-mounted UE in adjacent area are resident situation and determine that base station radio-frequency operating mode, the base station radio-frequency operating mode are interference measurement mode
Or normal mode of operation,
Measurement module, for configuring frequency point by base station receiver and bandwidth being carried out when base station is interference measurement mode
Measurement counts all RB in bandwidth and interferes ratio, and RB interference ratio cycle is reported to service server；Service server root
The adjustment of traffic scheduling strategy is carried out according to the interference result received；
Scheduler module, for enabling service server and base station according to most when base station radio frequency module is normal mode of operation
New scheduling strategy to carry out traffic scheduling for vehicle-mounted UE.
Moreover, base station is resident the implementation that situation determines base station radio-frequency operating mode according to local area and the vehicle-mounted UE in adjacent area
For when base station affiliated subdistrict and its all adjacent cell all resident, radio-frequency module starting interference measurement works of base station without vehicle-mounted UE
Operation mode；When base station affiliated subdistrict or its any adjacent area have UE resident, the radio-frequency module of base station is switched to normal mode of operation.
Moreover, the implementation of all RB interference ratios is to be divided into Whole frequency band according to band width configuration and subframe in bandwidth
The energy value on each RB is calculated in multiple resource block RB, and root interferes RB for RB points and do not interfere in preset threshold value TH
RB realizes that all RB interfere ratio in statistics bandwidth.
Moreover, service server carries out the adjustment of traffic scheduling strategy according to the interference result received, it is included in the bis- nets of AB
Under covering scheme, RB interference ratio is netted according to A and B net RB interference proportion composite carries out the adjustment of traffic scheduling strategy.
The present invention proposes to disappear under one kind complex jamming scene locating for rail traffic private network by self-adapted service scheduling
The technical solution of influence except changeable interference environment to service feature is measured using trackside base station radio frequency module PERIODIC INTERFERENCE
Carry out auxiliary activities scheduling, base station configures specific frequency point and bandwidth measures, and statistics interference index simultaneously periodically reports to business
Server, service server carry out the adjustment of traffic scheduling strategy according to index, thus to allow traffic scheduling suitable as far as possible
Assigned in various interference environments, avoids influencing user experience, be a kind of efficient dispatching method.
The present invention has the advantages that
1. improve base station radio frequency module carves the function of carrying out full-band noise measurement during idle time；
2. being adapted to corresponding image quality using band interference statistical indicator for video traffic；
3. linking information according to more base stations to trigger base station operation pattern switching.
Detailed description of the invention
Fig. 1 is rail vehicle earth communication system schematic diagram in the prior art.
Fig. 2 is application scenarios schematic diagram of the embodiment of the present invention.
Fig. 3 is technical solution of embodiment of the present invention flow chart.
Specific embodiment
Below by embodiment combination attached drawing, invention is further described in detail.
The embodiment of the present invention provides business scheduling method and device under a kind of redundant communication system, shares for trade Special Network
Under frequency range complex jamming scene, influence of the changeable interference environment to service feature is eliminated by self-adapted service scheduling.With
Under be described in detail.
In the following, one kind provided in an embodiment of the present invention is discussed in detail in scene described in conjunction with Figure 2 by the embodiment of the present invention
Business scheduling method under redundant communication system, this method can eliminate changeable interference environment pair by self-adapted service scheduling
The influence of service feature.Fig. 3 is that the process of business scheduling method under a kind of redundant communication system provided in an embodiment of the present invention is shown
It is intended to, applies in the scene described in Fig. 2.Referring to fig. 2, under rail traffic scene, can there are A and B in each cell range
Two base stations carry out service coverage to cell jointly, and A network service server control A nets the traffic scheduling situation of all base stations, B net
Service server controls the traffic scheduling situation of all B nets.For this purpose, the present invention proposes that following scheme is as follows:
Simultaneously real-time informing is to all neighbor base stations for its UE presence information of base station maintenance, and base station is according to local area and the vehicle-mounted UE in adjacent area
Resident situation determines base station radio-frequency operating mode, when base station affiliated subdistrict and its all adjacent cell all without vehicle-mounted UE it is resident,
So radio-frequency module will start interference measurement operating mode；If base station affiliated subdistrict or its any adjacent area have UE resident, then penetrating
Frequency module can be switched to normal mode of operation.
When base station is interference measurement mode, base station receiver configures specific frequency point and bandwidth measures, will be received
The eating dishes without rice or wine of specific frequency point and bandwidth and is converted to digital signal at signal.Whole frequency band is divided into multiple RB according to band width configuration and subframe,
A square operation for summation is carried out to the signal amplitude on each RB and obtains the energy value on each RB.Threshold value is arranged for energy value
TH interferes RB for RB points and does not interfere with RB, counts all RB in bandwidth and interferes ratio.RB interference ratio cycle is reported to
Service server.Service server carries out the adjustment of traffic scheduling strategy according to the interference result received.
When base station radio frequency module is normal mode of operation, service server and base station according to newest scheduling strategy come for
Vehicle-mounted UE carries out traffic scheduling.
Referring to Fig. 3, the process of business scheduling method under a kind of redundant communication system provided in an embodiment of the present invention:
1) base station operation pattern switching:
There are two types of operating modes, i.e. normal mode of operation and interference measurement operating mode for base station radio frequency module.Operating mode
Conversion be to be resident situation according to vehicle-mounted UE to determine.Therefore, since process judging active base station mode, it is first determined whether
There is vehicle-mounted UE to need to service, when base station affiliated subdistrict and its all adjacent cell all without vehicle-mounted UE it is resident, then enter step 2),
Radio-frequency module will start interference measurement operating mode；As base station affiliated subdistrict or its any adjacent area have, UE is resident, then entering step
It is rapid 4), radio-frequency module can be switched to normal mode of operation.The resident situation of vehicle-mounted UE is resident base station maintenance and real-time informing by it
To all neighbor base stations, as the important input for judging radio-frequency module operating mode.
2) interference measurement
Under interference measurement operating mode, base station receiver configures specific frequency point and bandwidth measures, and default scoping is whole
A working band, the net base station A and B net base station independently carry out, by receive specific frequency point and bandwidth eat dishes without rice or wine signal and be converted to number
Word signal.Whole frequency band is divided into multiple RB (Resource Block, resource block) according to band width configuration and subframe, on each RB
I/Q signal amplitude carries out a square operation (I for summation2+Q2) obtain the energy value on each RB.Energy value is accordingly preset
Threshold value TH, RB point for interference RB and is not interfered with into RB, all RB in bandwidth is counted and interferes ratios, is i.e. interference RB accounts for all RB numbers
Percentage.RB interference ratio cycle is reported into service server, subsequently into step 3).
In IQ modulation, data are divided into two-way, carry out carrier modulation respectively, and two-way carrier wave is mutually orthogonal.I is in-phase
(same to phase), Q are quadrature (orthogonal).
When it is implemented, threshold value TH can use empirical value, such as 3dBm or 6dBm.
The RB interferes ratio, refers to that interference RB accounts for the ratio of total RB number.
3) scheduling strategy adjusts
Service server carries out the adjustment of traffic scheduling strategy according to the interference result received, and the business of rail traffic is main
It is Train Detection and Identification control business (column control business) and multimedia video business.Wherein column control business is even more important, is necessary
Want its performance of strict guarantee.And video traffic, compared with column control business, significance level is slightly lower, and can be by adjusting picture
Matter adapts to different transmission bandwidth demands.
RB interference ratio influences scheduling measurement as main indicator, in embodiment, under AB Double coverage scheme, according to
A nets RB interference ratio and B net RB interference proportion composite carries out the adjustment of traffic scheduling strategy:
For simplicity, A net and B net can be considered respectively since the low situation of interference ratio first when specific implementation,
Column control business comprehensively considers when being higher than preset threshold again prior to video traffic, interference ratio.
For A net:
When A net RB interference ratio is very low, such as≤20%, the above-listed control business of A net frequency band and video traffic can be just at this time
Often scheduling；
When 20% < RB interferes ratio < 40%, the above-listed control business of A net frequency band and video traffic can also be dispatched, but
Consider the resolution ratio of video is adjusted by 1080P to 720P in video traffic on A net frequency band；
When 40%≤RB interferes ratio < 60%, by video resolution is adjusted to D1 in video traffic on A net frequency band, i.e.,
720x576；
When RB interferes ratio >=60%, A net frequency band on dispatch queue control business, does not dispatch video traffic in principle.This
When such as B net RB interference ratio be no more than 60%, then video traffic only B net dispatch；But if the RB of A net and B net interferes ratio
Simultaneously all >=60, then it can only select RB interference ratio lower one to throw the net and carry out schedule video business, and RB interference ratio is higher
One throw the net dispatch queue control business.
For B net:
When B net RB interference ratio is very low, such as≤20%, the above-listed control business of B net frequency band and video traffic can be just at this time
Often scheduling；
When 20% < RB interferes ratio < 40%, the above-listed control business of B net frequency band and video traffic can also be dispatched, but
Consider the resolution ratio of video is adjusted by 1080P to 720P in video traffic on B net frequency band；
When 40%≤RB interferes ratio < 60%, by video resolution is adjusted to D1 in video traffic on B net frequency band, i.e.,
720x576；
When RB interferes ratio >=60%, B net frequency band on dispatch queue control business, does not dispatch video traffic in principle.This
When as A net RB interference ratio be no more than 60% if video traffic only A net dispatch；Such as A net and B the RB interference ratio netted while all
>=60, then it can only select RB interference ratio lower one to throw the net and carry out schedule video business, and RB interferes ratio higher one
Net dispatch queue control business.
4) traffic scheduling
When base station radio frequency module switches to normal mode of operation, service server and base station are according to newest scheduling strategy
To carry out traffic scheduling for vehicle-mounted UE.
When it is implemented, can continue to carry out the above process, after executing step 3) and step 4), all return steps 1) again
Judge current active base station mode.The automatic running that above method process can be realized using software mode, can also use
Modular mode provides corresponding system.
Traffic scheduling device under a kind of rail traffic redundant communication system provided in an embodiment of the present invention, including with lower die
Block,
Judgment module, for enabling base station maintenance local area UE presence information, simultaneously real-time informing is to all neighbor base stations, according to this
Area and the vehicle-mounted UE in adjacent area are resident situation and determine that base station radio-frequency operating mode, the base station radio-frequency operating mode are interference measurement mode
Or normal mode of operation,
Measurement module, for configuring frequency point by base station receiver and bandwidth being carried out when base station is interference measurement mode
Measurement counts all RB in bandwidth and interferes ratio, and RB interference ratio cycle is reported to service server；Service server root
The adjustment of traffic scheduling strategy is carried out according to the interference result received；
Scheduler module, for enabling service server and base station according to most when base station radio frequency module is normal mode of operation
New scheduling strategy to carry out traffic scheduling for vehicle-mounted UE.
Each module specific implementation can be found in correlation method, and it will not go into details by the present invention.
Business scheduling method and device under a kind of redundant communication system is provided for the embodiments of the invention above to carry out
It is discussed in detail, specific case used herein is expounded the principle of the present invention and way of example, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (8)
1. the business scheduling method under a kind of rail traffic redundant communication system, it is characterised in that: base station maintenance local area UE is resident
Information simultaneously be resident situation according to local area and the vehicle-mounted UE in adjacent area and determine that base station radio-frequency works by real-time informing to all neighbor base stations, base station
Mode, the base station radio-frequency operating mode be interference measurement mode or normal mode of operation,
When base station is interference measurement mode, base station receiver configuration frequency point and bandwidth are measured, and count all RB in bandwidth
RB interference ratio cycle is reported to service server by interference ratio；Service server is carried out according to the interference result received
The adjustment of traffic scheduling strategy；
When base station radio frequency module is normal mode of operation, service server and base station are vehicle-mounted according to newest scheduling strategy
UE carries out traffic scheduling.
2. the business scheduling method under rail traffic redundant communication system according to claim 1, it is characterised in that: base station root
It is according to the implementation that local area and the vehicle-mounted UE in adjacent area are resident situation decision base station radio-frequency operating mode, when base station affiliated subdistrict and its
All adjacent cells are all resident without vehicle-mounted UE, and the radio-frequency module of base station starts interference measurement operating mode；When base station affiliated subdistrict
Or its any adjacent area has UE resident, the radio-frequency module of base station is switched to normal mode of operation.
3. the business scheduling method under rail traffic redundant communication system according to claim 1, it is characterised in that: in bandwidth
The implementation of all RB interference ratios is that Whole frequency band is divided into multiple resource block RB according to band width configuration and subframe, is calculated
Energy value onto each RB, root interfere RB for RB points and do not interfere with RB in preset threshold value TH, realize institute in statistics bandwidth
There is RB to interfere ratio.
4. the business scheduling method under the according to claim 1 or 2 or 3 rail traffic redundant communication systems, it is characterised in that:
Service server carries out the adjustment of traffic scheduling strategy according to the interference result received, is included under AB Double coverage scheme, root
The adjustment of traffic scheduling strategy is carried out according to A net RB interference ratio and B net RB interference proportion composite.
5. the traffic scheduling device under a kind of rail traffic redundant communication system, it is characterised in that: it comprises the following modules,
Judgment module, for enabling base station maintenance local area UE presence information and real-time informing to all neighbor base stations, according to local area and
The vehicle-mounted UE in adjacent area is resident situation and determines base station radio-frequency operating mode, and the base station radio-frequency operating mode is for interference measurement mode or just
Normal operating mode,
Measurement module, for configuring frequency point by base station receiver and bandwidth being measured when base station is interference measurement mode,
It counts all RB in bandwidth and interferes ratio, RB interference ratio cycle is reported into service server；Service server is according to receipts
The interference result arrived carries out the adjustment of traffic scheduling strategy；
Scheduler module, for enabling service server and base station according to newest when base station radio frequency module is normal mode of operation
Scheduling strategy to carry out traffic scheduling for vehicle-mounted UE.
6. the traffic scheduling device under rail traffic redundant communication system according to claim 5, it is characterised in that: base station root
It is according to the implementation that local area and the vehicle-mounted UE in adjacent area are resident situation decision base station radio-frequency operating mode, when base station affiliated subdistrict and its
All adjacent cells are all resident without vehicle-mounted UE, and the radio-frequency module of base station starts interference measurement operating mode；When base station affiliated subdistrict
Or its any adjacent area has UE resident, the radio-frequency module of base station is switched to normal mode of operation.
7. the traffic scheduling device under rail traffic redundant communication system according to claim 5, it is characterised in that: in bandwidth
The implementation of all RB interference ratios is that Whole frequency band is divided into multiple resource block RB according to band width configuration and subframe, is calculated
Energy value onto each RB, root interfere RB for RB points and do not interfere with RB in preset threshold value TH, realize institute in statistics bandwidth
There is RB to interfere ratio.
8. according to the traffic scheduling device under claim 5 or 6 or the 7 rail traffic redundant communication systems, it is characterised in that:
Service server carries out the adjustment of traffic scheduling strategy according to the interference result received, is included under AB Double coverage scheme, root
The adjustment of traffic scheduling strategy is carried out according to A net RB interference ratio and B net RB interference proportion composite.
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| CN114157373A (en) * | 2021-12-06 | 2022-03-08 | 上海中铁通信信号测试有限公司 | Rail transit wireless communication interference test method and device |
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