CN103442362A - Communication device and method for interference coordination and energy conservation with same adopted - Google Patents
Communication device and method for interference coordination and energy conservation with same adopted Download PDFInfo
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- CN103442362A CN103442362A CN2013103793937A CN201310379393A CN103442362A CN 103442362 A CN103442362 A CN 103442362A CN 2013103793937 A CN2013103793937 A CN 2013103793937A CN 201310379393 A CN201310379393 A CN 201310379393A CN 103442362 A CN103442362 A CN 103442362A
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Abstract
The invention discloses an inter-cell interference coordination and energy conservation device of a high-speed railway train-ground communication system. The device comprises a base station directional antenna, a base station wireless remoting unit, a base station baseband processing unit, a motor train unit parameter estimation unit, a base station controller, a train-mounted table directional antenna, a train-mounted table wireless remoting unit and a train-mounted table baseband processing unit. The invention further discloses a method, for inter-cell interference coordination and energy conservation of the high-speed railway train-ground communication system, with the device adopted. The motion vector and the location of a motor train unit are estimated and predicted in real time through the motor train unit parameter estimation unit, a small amount of base station equipment in the high-speed railway train-ground communication system is activated selectively, and therefore inter-cell interference and the power dissipation of the base station equipment are greatly reduced.
Description
Technical field
The present invention relates to the high-speed railway communication system, relate in particular to interference coordination and the energy saver of communication system and adopt this device to carry out interference coordination and energy-conservation method, belong to wireless communication technology field.
Background technology
What at present high-speed railway adopted the GSM-R cordless communication network to provide is only arrowband, low-speed communication business, is mainly used in railway system's internal pair production required, far can not meet the requirement of current Development of High Speed Railway.Particularity due to high-speed railway transportation, need the car-ground wireless communication networks in broadband of design specialized to cover line of high-speed railway, to meet the demand of row control information, real-time video monitoring, vehicle-mounted key equipment working state monitoring, emergency communication guarantee, passenger's high-speed data communication and amusement.
Mobile communication system experiences three generations's development, evolves to the 4th generation cellular wireless system LTE of today, has realized the transition from the narrowband voice to the high-speed data.The car-ground Communications System Segment in China's a new generation's high-speed railway broadband adopts the TD-LTE technology, and the presence of intercell interference that its identical networking produces is one of key technology that must solve.The Inter-Cell Interference Coordination algorithm of existing LTE system is all with low speed, multi-user ,Duo community, the planar application scenarios that is covered as, poor to the high ferro environmental suitability more than speed per hour 350km/ hour.Therefore between the car-ground communication system cell of a kind of high-speed railway, the exploitation of interference coordination and energy-conservation apparatus and method is necessary.
Summary of the invention
Technical problem to be solved by this invention is to provide interference coordination and energy-conservation device between the car-ground communication system cell of a kind of high-speed railway, this device can meet speed per hour 350km/ hour and the needs of the above car-ground broadband wireless communications of motor train unit, reduces the energy consumption of base station equipment simultaneously.
The technical problem that the present invention also will solve is to provide interference coordination and energy-conservation method between the car-ground communication system cell of a kind of high-speed railway.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
Interference coordination and energy-conservation device between the car-ground communication system cell of a kind of high-speed railway, comprise base station directional antenna, base station radio extension unit, base station baseband processing unit, motor train unit parameter estimation unit, base station controller, Vehicle mounted station directional antenna, the wireless extension unit of Vehicle mounted station and Vehicle mounted station baseband processing unit;
Wherein, described base station directional antenna consists of two back-to-back gain directional antenna, and the maximum of two described gain directional antenna is pointed to contrary, and its pointing direction and rail direction are point-blank;
Described base station radio extension unit is fixedly connected with directional antenna, and it transmits and receives wireless signal by directional antenna;
Described base station baseband processing unit is connected with the wireless extension unit of a plurality of distributed base stations of high ferro configuration along the line, and it is for the base band signal process of base station side;
Described motor train unit parameter estimation unit, its movement velocity of motor train unit by real-time estimating and forecasting, direction and position parameter data are transferred to the base station baseband processing unit, then are transferred to base station controller by the base station baseband processing unit;
Described base station controller, be connected with a plurality of distributed base station baseband processing units;
Described Vehicle mounted station directional antenna consists of two back-to-back gain directional antenna, and the maximum of two described gain directional antenna is pointed to contrary, and the direction of motion of the sensing of the maximum of described gain directional antenna and motor train unit point-blank;
The wireless extension unit of described Vehicle mounted station is fixedly connected with directional antenna, and it receives and wireless signal emission by directional antenna;
Described Vehicle mounted station baseband processing unit is connected with the onboard wireless extension unit, and it is for the base band signal process of motor train unit side.
Wherein, described base station directional antenna consists of two back-to-back gain directional antenna, the maximum of two described gain directional antenna is pointed to contrary, two contrary gain directional antenna of maximum sensing, the overlay area of one of them gain directional antenna wave beam is 0～R rice, and the overlay area of another gain directional antenna wave beam is-R～0 meter.
Interference coordination and energy-conservation method between the car-ground communication system cell of a kind of high-speed railway, concrete operation step is as follows:
Step 1, be divided into A1, A2, B San Ge district by the overlay area of base station radio extension unit; Wherein, for each base station radio extension unit (hereinafter to be referred as base station), it both comprised the A1 area of coverage, also comprise the A2 area of coverage, with the overlapping area of coverage B district of previous adjacent base station, and with the overlapping area of coverage B district of a rear adjacent base station;
Step 2, in base station side, base station controller is at first by analysis and the processing of motor train unit movement velocity, direction and location parameter data to a plurality of motor train unit parameter estimation unit, estimating and forecasting goes out motion vector and the position of adjacent motor train unit in real time, the base station radio extension unit overlay area that integrating step 1 is divided again, implement community activation algorithm and interference coordination algorithm, select to activate the current base station radio extension unit that covering is provided, close other base station radio extension unit.
Wherein, in step 1, the A1 district means the zone in-(R-D)～0 scope apart from the base station radio extension unit, the A2 district means the zone in 0～(R-D) scope apart from the base station radio extension unit, the overlapping area that the B district is the wireless extension unit of adjacent base station, it means apart from the base station radio extension unit zone in (R-D)～R scope.
Wherein, described R is the distance that two contrary directional antenna beams of maximum sensing of base station radio extension unit cover respectively, wherein, the coverage distance of a directional antenna beams is 0～R rice, the coverage distance of another directional antenna beams is-R～0 meter, the length of the overlapping area that D is the wireless extension unit of adjacent base station.
Wherein, in step 2, the current location of the adjacent motor train unit of the real-time estimating and forecasting of base station controller, velocity and T second later position.
Wherein, in step 2, method algorithm alive is swashed in described community, when the motor-car current location and T second later position in the A1 of any one base station area of coverage, and the motor-car direction of motion is for approaching this base station, activate the wave beam that this base station is positioned at the A1 district, Vehicle mounted station is wireless, and extension unit is used sensing wave beam and the base station communication identical with the motor-car direction of motion;
When the motor-car current location in the A1 of a certain base station area of coverage, T second, later position was in the A2 of this base station area of coverage, and the motor-car direction of motion is for approaching this base station, activate the wave beam that this base station is positioned at A1 district and A2 district simultaneously, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam identical with the motor-car direction of motion to communicate by letter with the wave beam that is positioned at the A1 district in base station, and the wireless extension unit preparation of Vehicle mounted station is simultaneously pointed to the wave beam contrary with the motor-car direction of motion and communicated by letter with the wave beam that is positioned at the A2 district in base station;
When the motor-car current location and T second later position in the A2 of a certain base station area of coverage, and the motor-car direction of motion is away from this base station, activate the wave beam that this base station is positioned at the A2 district, Vehicle mounted station is wireless, and extension unit is used sensing wave beam and the base station communication contrary with the motor-car direction of motion;
When the motor-car current location in the A2 of a certain base station I area of coverage, T second, later position was in the B area of coverage, and the motor-car direction of motion is away from this base station, activate the wave beam that this base station is positioned at the A2 district, and next base station II adjacent with this base station I is positioned at the wave beam in A1 district, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam contrary with the motor-car direction of motion to communicate by letter with the wave beam that base station I is positioned at the A2 district, prepares to point to the wave beam identical with the motor-car direction of motion simultaneously and communicates by letter with the wave beam that base station II is positioned at the A1 district;
When the motor-car current location in the B area of coverage, T second later position in the B area of coverage or/the A1 area of coverage of a certain base station I, and the motor-car direction of motion is away from this base station II, activate base station II and be positioned at the wave beam in A2 district and the wave beam that base station I is positioned at the A1 district, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam contrary with the motor-car direction of motion to communicate by letter with the wave beam that base station II is positioned at the A2 district, uses the sensing wave beam identical with the motor-car direction of motion to communicate by letter with the wave beam that base station I is positioned at the A1 district; Base station II is the base station of process of motor-car, and base station I is the close base station of motor-car.
Wherein, in step 2, described interference coordination algorithm, according to the adjacent motor-car area of coverage of living in, disturb the impact on signal interference ratio, signal interference ratio=(P2x between calculation plot
n/ P1x
n)
2, when signal interference ratio is greater than the threshold value L of setting, do not carry out interference coordination; When signal interference ratio is less than threshold value L, be greater than [1+ (2R-D)/R]
2the time, base station controller dynamic dispatching frequency, time resource; Wherein, P2x
nfor the current location of motor-car I, P1x
nthe current location of motor-car II, described motor-car I is adjacent with motor-car II.
Beneficial effect: than prior art, interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway of the present invention, taken into full account the special networking model of line of high-speed railway, the method of taking selective activation base station wave beam and dynamic frequency resource to distribute, when farthest reducing presence of intercell interference, also greatly reduce the energy consumption of system equipment.In addition, between the car-ground communication system cell of employing high-speed railway of the present invention, the apparatus structure of interference coordination and power-economizing method is simple, reasonable.
The accompanying drawing explanation
The structural representation that Fig. 1 is interference coordination and energy saver between the car-ground communication system cell of a kind of high-speed railway of the present invention;
Fig. 2 be between the car-ground communication system cell of a kind of high-speed railway of the present invention in interference coordination and power-economizing method the base station wave beam cover schematic diagram;
Fig. 3 is the directional diagram of base station directional antenna beams in interference coordination and power-economizing method between the car-ground communication system cell of a kind of high-speed railway of the present invention;
Fig. 4 is the directional diagram of roof Vehicle mounted station directional antenna beams in interference coordination and power-economizing method between the car-ground communication system cell of a kind of high-speed railway of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further set forth.
For convenience of description, the later small letter English alphabet " x " of this paper means that this position number can replace by positive integer, to mean different Vehicle mounted stations and base station equipment, velocity V
xnapproach BS-RRU direction motion for just, velocity V
xnaway from the motion of BS-RRU direction, be negative, base station radio extension unit (abbreviation base station).
As shown in Fig. 1～4, interference coordination and energy-conservation device between the car-ground communication system cell of a kind of high-speed railway, comprise base station directional antenna 14, base station radio extension unit 15BSx-RRU, base station baseband processing unit 16BSx-BBUx, motor train unit parameter estimation unit 17BSx-TPU, base station controller 18BSC, Vehicle mounted station directional antenna 13, Vehicle mounted station is wireless extension unit 12UEx-RRU and Vehicle mounted station baseband processing unit 11UEx-BBU, by two, gain directional antenna 14BxA1 and the BxA2 of Unit 2 * 4 form described base station directional antenna 14 back-to-back, antenna gain is 16dB, its directional diagram as shown in Figure 3, the maximum of BxA1 and BxA2 directional diagram is pointed to contrary, and its pointing direction and rail direction are point-blank, described base station radio extension unit 15, for two RF passage RRU, complete the mutual conversion of digital baseband and radiofrequency signal, and its RF interface transmits and receives wireless signal by BxA1, BxA2, described base station baseband processing unit 16 is connected with the wireless extension unit 15 of a plurality of distributed base stations of high ferro configuration along the line, and it comprises the modules such as modulation, demodulation, coding, decoding, for the base band signal process of base station side, described motor train unit parameter estimation unit 17BS-TPU, complete the real-time estimating and forecasting of movement velocity, direction and location parameter to motor train unit, described base station controller 18BSC, for a plurality of base station baseband processing unit of control and management 16BS-BBU, form single community many antennas Distributed coverage, receive simultaneously and process the information of a plurality of motor train unit parameter estimation unit 17BS-TSU, implement interference coordination algorithm and community and swash method algorithm alive, by two, gain directional antenna 13UxA1, the UxA2 of Unit 2 * 4 form described Vehicle mounted station directional antenna 13 back-to-back, antenna gain is 13dB, its directional diagram as shown in Figure 4, point to contrary by the maximum of UxA1 and UxA2 directional diagram, and itself and the motor train unit direction of motion are point-blank, described Vehicle mounted station is wireless extension unit 12UEx-RRU, complete the mutual conversion of digital baseband and radiofrequency signal, and it receives and wireless signal emission by UxA1, UxA2, described Vehicle mounted station baseband processing unit 11UEx-BBU is connected with the wireless extension unit 12 of Vehicle mounted station, for the base band signal process of motor train unit side.
Interference coordination and energy-conservation method between the car-ground communication system cell of a kind of high-speed railway, concrete operation step is:
Step 1, two contrary directional antenna beams BxA1, BxA2 of maximum sensing of base station radio extension unit, the coverage of wave beam BxA1 is-1500～0 meter, wave beam BxA2 coverage is 0～1500 meter; The overlapping area of adjacent base station is wireless extension unit BS-RRU1 and BS-RRU2 is 300 meters; The covering of BS-RRUx is divided into to A1, A2, B San Ge district, the A1 district is the zone of base station radio extension unit BS-RRUx in-1200～0 meter scope, the A2 district means the zone of base station radio extension unit BS-RRUx in 0～1200 meter scope, the B district means the zone of base station radio extension unit BS-RRUx in 1200～1500 meters scopes, the overlapping area that the B district is base station wave beam B1A2 and B2A1; The spacing of two wireless extension units of adjacent base station is 2700 meters;
Step 2, in base station side, motor train unit parameter estimation unit BS-TPU, complete the real-time estimation of movement velocity to motor train unit, direction, location parameter, obtaining by reading in BS-BBU of movement velocity, directioin parameter estimates that the UE Doppler frequency shift obtains indirectly, if radio-frequency carrier is f
0, the Doppler frequency shift of the relative base station of UE is df, velocity is V
n=df/f
0* C, f
0for carrier wave, C is the light velocity, and the roof Vehicle mounted station includes GPS information, and this information is real-time transmitted to base station, therefore can directly read the gps data of the UE present position of demodulation in BS-RRU, thereby obtain the position P of relative base station BS-RRUx
n, at base station controller, the current location P1 of the real-time adjacent motor train unit UE1 of estimating and forecasting, UE2
n, P2
n, velocity V1
n, V2
n, T second later position P1
n+1=P1
n+ V1
n* T, P2
n+1=P2
n+ V2
n* T, T is the start-up time that the base station activation wave beam needs, and usually is less than 1 second, at base station controller 18, carries out the community activation algorithm, selects to activate the current BS-RRU that covering is provided, and closes other BS-RRU;
Adopt the community activation algorithm, work as Px
n, Px
n+1in the A1 area of coverage, and V
xn>=0, the B1A1 wave beam of activation base station, Vehicle mounted station UEx is used UxA2 wave beam and base station communication;
Adopt the community activation algorithm, work as Px
nin the A1 area of coverage, Px
n+1in the A2 area of coverage, and V
xn>=0, B1A1, the B1A2 wave beam of activation base station, Vehicle mounted station UEx is used the UxA2 wave beam to communicate by letter with base station B1A1 wave beam, prepares UxA1 simultaneously and communicates by letter with the B1A2 wave beam of base station; ;
Adopt the community activation algorithm, work as Px
n, Px
n+1in the A2 area of coverage, and V
xn<0, the B1A2 wave beam of activation base station, Vehicle mounted station UEx is used UxA1 wave beam and base station communication;
Adopt the community activation algorithm, work as Px
nin the A2 area of coverage, Px
n+1in the B area of coverage, and V
xn<0, B1A2, the B2A1 wave beam of activation base station, Vehicle mounted station UEx is used the UxA1 wave beam to communicate by letter with the B1A2 wave beam of base station, prepares UxA2 simultaneously and communicates by letter with the B2A1 wave beam of base station;
Adopt the community activation algorithm, work as Px
nin the B area of coverage, Px
n+1in B or/the A1 area of coverage, and V
xn<0, B1A2, the B2A1 wave beam of activation base station, Vehicle mounted station UEx is used UxA1 to communicate by letter with the B1A2 wave beam of base station, uses the UxA2 wave beam to communicate by letter with the B2A1 of base station;
Adopt the community activation algorithm, due to the space selectivity characteristic of directional antenna, for single Vehicle mounted station UE, activate the presence of intercell interference caused between wave beam and can ignore.
The coordinating district interference algorithm, according to P1x
n, P2x
nthe area of coverage of living in, disturb the impact on signal interference ratio SIR between calculation plot, work as P1x
n, P2x
nin the similar area of coverage, can produce the phase mutual interference between the base station wave beam of activation, the signal interference ratio that the UE1 of take is reference is SIR=(P2x
n/ P1x
n)
2, the SIR minimum value occurs in the similar area of coverage situation that is spaced apart R that activates, and now UE1 is in covering R place, edge, SIR|
min=[1+ (2R-D)/R]
2=7.84; When SIR is greater than threshold value 100, interference can be ignored, and does not carry out interference coordination; When SIR is less than threshold value 100, be greater than at 7.84 o'clock, base station controller, scheduling activates frequency, the time resource of BS-RRUx, make the shared Resource Block non-overlapping copies of BS-RRUx, guarantee that UE1, UE2 can communicate by letter with base station BS-RRUx reliably with rational data transfer rate.
In described embodiment, adopt interference coordination and energy-conservation device between the car-ground communication system cell of a kind of high-speed railway of the present invention, and the method for utilizing this device, motion vector and position by the prediction motor train unit, select a small amount of base station equipment in activation system, thereby the interference of minizone and the power consumption of base station equipment have been greatly reduced, with high ferro motor train unit speed of service 350km/ hour, minimum tracking train intervals 6 minutes, base station radio extension unit spacing 3km is that example is calculated, high-speed railway to the two-wire operation, only have at most the two row motor train unit that traffic direction is contrary in the 35km scope, BS-RRU quantity is 12, the average base station number activated is 2, system power dissipation of the present invention is only 1/6 of the whole activation in base station, energy consumption reduces greatly.The signal interference ratio SIR that presence of intercell interference of the present invention causes is minimum is 7.84(8.9dB), the identical networking of comparing general commercial LTE is greatly improved.
Those of ordinary skill in the art will appreciate that, embodiment described here is in order to help reader understanding's protection scope of the present invention not limit to and such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from essence of the present invention according to these technology enlightenments disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.Protection scope of the present invention only is as the criterion by claims.
Claims (8)
1. interference coordination and energy-conservation device between the car-ground communication system cell of high-speed railway, it is characterized in that: comprise base station directional antenna (14), base station radio extension unit (15), base station baseband processing unit (16), motor train unit parameter estimation unit (17), base station controller (18), Vehicle mounted station directional antenna (13), the wireless extension unit of Vehicle mounted station (12) and Vehicle mounted station baseband processing unit (11);
Wherein, described base station directional antenna (14) consists of two back-to-back gain directional antenna, and the maximum of two described gain directional antenna is pointed to contrary, and its pointing direction and rail direction are point-blank;
Described base station radio extension unit (15) is fixedly connected with directional antenna (14), and it transmits and receives wireless signal by directional antenna (14);
Described base station baseband processing unit (16) is connected with the wireless extension unit of a plurality of distributed base stations (15) of high ferro configuration along the line, and it is for the base band signal process of base station side;
Described motor train unit parameter estimation unit (17), its movement velocity of motor train unit by real-time estimating and forecasting, direction and position parameter data are transferred to base station baseband processing unit (16), then are transferred to base station controller (18) by base station baseband processing unit (16);
Described base station controller (18), be connected with a plurality of distributed base station baseband processing units (16);
Described Vehicle mounted station directional antenna (13) consists of two back-to-back gain directional antenna, and the maximum of two described gain directional antenna is pointed to contrary, and the direction of motion of the sensing of the maximum of described gain directional antenna and motor train unit point-blank;
The wireless extension unit of described Vehicle mounted station (12) is fixedly connected with directional antenna (13), and it receives and wireless signal emission by directional antenna (13);
Described Vehicle mounted station baseband processing unit (11) is connected with onboard wireless extension unit (12), and it is for the base band signal process of motor train unit side.
2. interference coordination and energy-conservation device between the car-ground communication system cell of high-speed railway according to claim 1, it is characterized in that: described base station directional antenna (14) consists of two back-to-back gain directional antenna, the maximum of two described gain directional antenna is pointed to contrary, two contrary gain directional antenna of maximum sensing, the overlay area of one of them gain directional antenna wave beam is 0～R rice, and the overlay area of another gain directional antenna wave beam is-R～0 meter.
3. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway, it is characterized in that: concrete operation step is as follows:
Step 1, be divided into A1, A2, B San Ge district by the overlay area of base station radio extension unit;
Step 2, in base station side, base station controller is at first by analysis and the processing of motor train unit movement velocity, direction and location parameter data to a plurality of motor train unit parameter estimation unit, estimating and forecasting goes out motion vector and the position of adjacent motor train unit in real time, the base station radio extension unit overlay area that integrating step 1 is divided again, implement community activation algorithm and interference coordination algorithm, select to activate the current base station radio extension unit that covering is provided, close other base station radio extension unit.
4. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway according to claim 3, it is characterized in that: in step 1, the A1 district means the zone in-(R-D)～0 scope apart from the base station radio extension unit, the A2 district means the zone in 0～(R-D) scope apart from the base station radio extension unit, the overlapping area that the B district is the wireless extension unit of adjacent base station, it means apart from the base station radio extension unit zone in (R-D)～R scope.
5. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway according to claim 4, it is characterized in that: described R is the distance that two contrary directional antenna beams of maximum sensing of base station radio extension unit cover respectively, wherein, the coverage distance of a directional antenna beams is 0～R rice, the coverage distance of another directional antenna beams is-R～0 meter, the length of the overlapping area that D is the wireless extension unit of adjacent base station.
6. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway according to claim 3, it is characterized in that: in step 2, the current location of the adjacent motor train unit of the real-time estimating and forecasting of base station controller, velocity and T second later position.
7. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway according to claim 3, it is characterized in that: in step 2, method algorithm alive is swashed in described community, when the motor-car current location and T second later position in the A1 of any one base station area of coverage, and the motor-car direction of motion is for approaching this base station, activate the wave beam that this base station is positioned at the A1 district, Vehicle mounted station is wireless, and extension unit is used sensing wave beam and the base station communication identical with the motor-car direction of motion;
When the motor-car current location in the A1 of a certain base station area of coverage, T second, later position was in the A2 of this base station area of coverage, and the motor-car direction of motion is for approaching this base station, activate the wave beam that this base station is positioned at A1 district and A2 district simultaneously, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam identical with the motor-car direction of motion to communicate by letter with the wave beam that is positioned at the A1 district in base station, and the wireless extension unit preparation of Vehicle mounted station is simultaneously pointed to the wave beam contrary with the motor-car direction of motion and communicated by letter with the wave beam that is positioned at the A2 district in base station;
When the motor-car current location and T second later position in the A2 of a certain base station area of coverage, and the motor-car direction of motion is away from this base station, activate the wave beam that this base station is positioned at the A2 district, Vehicle mounted station is wireless, and extension unit is used sensing wave beam and the base station communication contrary with the motor-car direction of motion;
When the motor-car current location in the A2 of a certain base station I area of coverage, T second, later position was in the B area of coverage, and the motor-car direction of motion is away from this base station, activate the wave beam that this base station is positioned at the A2 district, and next base station II adjacent with this base station I is positioned at the wave beam in A1 district, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam contrary with the motor-car direction of motion to communicate by letter with the wave beam that base station I is positioned at the A2 district, prepares to point to the wave beam identical with the motor-car direction of motion simultaneously and communicates by letter with the wave beam that base station II is positioned at the A1 district;
When the motor-car current location in the B area of coverage, T second later position in the B area of coverage or/the A1 area of coverage of a certain base station I, and the motor-car direction of motion is away from this base station II, activate base station II and be positioned at the wave beam in A2 district and the wave beam that base station I is positioned at the A1 district, Vehicle mounted station is wireless, and extension unit is used the sensing wave beam contrary with the motor-car direction of motion to communicate by letter with the wave beam that base station II is positioned at the A2 district, uses the sensing wave beam identical with the motor-car direction of motion to communicate by letter with the wave beam that base station I is positioned at the A1 district; Base station II is the base station of process of motor-car, and base station I is the close base station of motor-car.
8. interference coordination and energy-conservation method between the car-ground communication system cell of high-speed railway according to claim 3, it is characterized in that: in step 2, described interference coordination algorithm, according to the adjacent motor-car area of coverage of living in, disturb the impact on signal interference ratio, signal interference ratio=(P2x between calculation plot
n/ P1x
n)
2, when signal interference ratio is greater than the threshold value L of setting, do not carry out interference coordination; When signal interference ratio is less than threshold value L, be greater than [1+ (2R-D)/R]
2the time, base station controller dynamic dispatching frequency, time resource; Wherein, P2x
nfor the current location of motor-car I, P1x
nthe current location of motor-car II, described motor-car I is adjacent with motor-car II.
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|---|---|---|---|
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| WO2016026081A1 (en) * | 2014-08-19 | 2016-02-25 | 华为技术有限公司 | Access node, scheduling system, base station and data backhaul method |
| CN105407458A (en) * | 2015-10-27 | 2016-03-16 | 努比亚技术有限公司 | Method and device for calling GPS prediction position information by mobile terminal |
| CN106921417A (en) * | 2015-12-23 | 2017-07-04 | 财团法人工业技术研究院 | Cooperative multipoint transmission method, control node and wireless communication device |
| CN107809767A (en) * | 2017-10-30 | 2018-03-16 | 努比亚技术有限公司 | A kind of information transferring method, mobile terminal, base station and computer-readable storage medium |
| CN107925447A (en) * | 2015-08-24 | 2018-04-17 | 瑞典爱立信有限公司 | Scheduling under High-speed Circumstance |
| CN107959972A (en) * | 2016-10-18 | 2018-04-24 | 宏达国际电子股份有限公司 | Environmental control system, control device and control method |
| CN108337662A (en) * | 2017-01-11 | 2018-07-27 | 大众汽车有限公司 | The method of wireless communication interference level of the adjustment from first movement platform to the second mobile station |
| CN110087191A (en) * | 2018-01-24 | 2019-08-02 | 海能达通信股份有限公司 | A kind of Timing Advance evaluation method and device |
| CN111565440A (en) * | 2019-01-29 | 2020-08-21 | 华为技术有限公司 | Method and communication device for wireless communication |
| CN111800678A (en) * | 2020-05-13 | 2020-10-20 | 清华大学 | Method and device for controlling wireless optical communication network of ultra-high-speed railway |
| WO2021036461A1 (en) * | 2019-08-30 | 2021-03-04 | 华为技术有限公司 | Communication method and related device |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873119B (en) * | 2014-03-27 | 2017-02-01 | 西南交通大学 | Vehicle-mounted double-antenna communication method |
| CN103873119A (en) * | 2014-03-27 | 2014-06-18 | 西南交通大学 | Vehicle-mounted double-antenna communication method |
| WO2016026081A1 (en) * | 2014-08-19 | 2016-02-25 | 华为技术有限公司 | Access node, scheduling system, base station and data backhaul method |
| CN106797072A (en) * | 2014-08-19 | 2017-05-31 | 华为技术有限公司 | Access node, scheduling system, base station and data back method |
| CN107925447A (en) * | 2015-08-24 | 2018-04-17 | 瑞典爱立信有限公司 | Scheduling under High-speed Circumstance |
| CN107925447B (en) * | 2015-08-24 | 2021-03-30 | 瑞典爱立信有限公司 | Scheduling in high speed scenarios |
| CN105407458B (en) * | 2015-10-27 | 2020-07-31 | 麒和科技(南京)有限公司 | Method and device for calling GPS (global positioning system) pre-estimated position information by mobile terminal |
| CN105407458A (en) * | 2015-10-27 | 2016-03-16 | 努比亚技术有限公司 | Method and device for calling GPS prediction position information by mobile terminal |
| CN106921417A (en) * | 2015-12-23 | 2017-07-04 | 财团法人工业技术研究院 | Cooperative multipoint transmission method, control node and wireless communication device |
| CN107959972A (en) * | 2016-10-18 | 2018-04-24 | 宏达国际电子股份有限公司 | Environmental control system, control device and control method |
| CN107959972B (en) * | 2016-10-18 | 2020-03-13 | 宏达国际电子股份有限公司 | Environment control system, control device and control method |
| CN108337662A (en) * | 2017-01-11 | 2018-07-27 | 大众汽车有限公司 | The method of wireless communication interference level of the adjustment from first movement platform to the second mobile station |
| CN108337662B (en) * | 2017-01-11 | 2021-01-19 | 大众汽车有限公司 | Method for adjusting interference level of wireless communication from first mobile station to second mobile station |
| CN107809767A (en) * | 2017-10-30 | 2018-03-16 | 努比亚技术有限公司 | A kind of information transferring method, mobile terminal, base station and computer-readable storage medium |
| CN110087191A (en) * | 2018-01-24 | 2019-08-02 | 海能达通信股份有限公司 | A kind of Timing Advance evaluation method and device |
| CN111565440A (en) * | 2019-01-29 | 2020-08-21 | 华为技术有限公司 | Method and communication device for wireless communication |
| WO2021036461A1 (en) * | 2019-08-30 | 2021-03-04 | 华为技术有限公司 | Communication method and related device |
| CN111800678A (en) * | 2020-05-13 | 2020-10-20 | 清华大学 | Method and device for controlling wireless optical communication network of ultra-high-speed railway |
| CN111800678B (en) * | 2020-05-13 | 2022-03-22 | 清华大学 | Method and device for controlling wireless optical communication network of ultra-high-speed railway |
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