CN103095356A - Beam forming method and base station and traffic transport device - Google Patents
Beam forming method and base station and traffic transport device Download PDFInfo
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- CN103095356A CN103095356A CN2011103466141A CN201110346614A CN103095356A CN 103095356 A CN103095356 A CN 103095356A CN 2011103466141 A CN2011103466141 A CN 2011103466141A CN 201110346614 A CN201110346614 A CN 201110346614A CN 103095356 A CN103095356 A CN 103095356A
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Abstract
The invention provides a beam forming method, a base station and a traffic transport device. The method beam forming includes that the base station receives position information which is sent by traffic equipment after entering into a community covered by the base station; the base station receives speed information which is sent by the traffic equipment after the traffic equipment enters into the community covered by the base station; the base station confirms beam parameters to be sent by the base station and adjusts the direction of the sent beam according to the received position information and the speed information of the traffic equipment and combing corresponding time delay information; the base station sends the beam to a communication device of the traffic equipment according to the direction of the beam to be adjusted. By the adoption of the method, the base station can accurately send the beam to the communication device of the traffic equipment, sending accuracy of the beam is improved, and communication quality is improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of manufacturing process, base station and communications and transportation device of wave beam.
Background technology
Development along with modern communication technology, people have more and more higher requirement to downlink transfer speed and the reliability of wireless communication system, therefore introduced multiaerial system, have more (multiple input and multiple output as advanced more, MIMO) type multiaerial system, not only adopt multiple receive antenna, also available multiple transmit antennas.Owing to having adopted many groups antenna, from transmitting terminal to the receiving terminal wireless signal, corresponding same spatial flow (spatial stream), transmit by mulitpath.At receiving terminal, adopt certain algorithm to receive that to a plurality of antennas signal is processed, just can obviously improve the signal to noise ratio of receiving terminal.Even when receiving terminal is far away, also can obtain signal quality preferably.Therefore multiaerial system has improved the capacity of system to a certain extent.
Capacity for further raising system, proposed again a kind of method of utilizing this multi-antenna technology---beam forming technique.This beam forming technique can form a narrower directional beam and point to user terminal, makes in this beam coverage, and the equivalent received channel situation of user terminal improves, thereby has reached the purpose that increases power system capacity.
Yet existing beam forming technique is normally in the reponse system of a closed loop, base station generates corresponding wave beam by the channel status of fully knowing user terminal and realizes above purpose.If in dynamic system, as under the high-speed motion environment, therefore the high speed of transit equipment makes this channel status always lag behind the virtual condition between base station and transit equipment, and traditional beam forming technique can't guarantee the wave beam direction that accurately aims at the mark.
Summary of the invention
Can't be applied to preferably the problem in dynamical system for solving existing beam forming technique, the embodiment of the present invention provides a kind of method, base station and transit equipment communicator of beam forming.
The embodiment of the present invention provides a kind of method of beam forming, comprising:
Base station receives the positional information that transit equipment enters the described transit equipment sent behind the community of described base station covering; Described base station receives the velocity information that described transit equipment enters the described transit equipment sent behind the community of described base station covering;
Described base station is according to positional information and the velocity information of the described transit equipment received, and determines the parameter of the wave beam that described base station will send in conjunction with corresponding Delay, adjusts the direction of transmission wave beam;
Described base station sends described wave beam according to described definite beam direction to described transit equipment.
The embodiment of the present invention also provides a kind of base station, comprising:
Receiving element, the positional information that enters the described transit equipment sent behind the community of base station covering for receiving transit equipment; Receive the velocity information that described transit equipment enters the described transit equipment sent behind the community of described base station covering;
Processing unit, for the Delay in conjunction with corresponding, and positional information and the velocity information of the described transit equipment that receives of described receiving element, determine the parameter of the wave beam that described base station will send, and adjusts the direction that sends wave beam
Transmitting element, send described wave beam according to described definite beam direction to described transit equipment.
The embodiment of the present invention also provides a kind of transit equipment communicator, it is characterized in that, comprises a communication terminal, and wherein, described communication terminal comprises:
Transmitting element, when entering the community that base station covers when described transit equipment communicator, send the positional information of described transit equipment to described base station, send the velocity information of described transit equipment to described base station;
Receiving element, the wave beam sent for receiving described base station, the beam direction that wherein said base station sends is positional information, the velocity information of described base station according to the described described transit equipment received, and determine in conjunction with corresponding Delay.
The beam-forming method that adopts the embodiment of the present invention to provide, base station and communications and transportation device, can realize the communications and transportation device to high-speed mobile, carries out beam forming, guarantees that wave beam can aim at the mark, and improves the precision of wave beam transmission, improves communication quality.
The accompanying drawing explanation
The fundamental diagram that Fig. 1 is mimo system in the embodiment of the present invention;
The flow chart that Fig. 2 is beam-forming method in the embodiment of the present invention;
Fig. 3 is the schematic diagram that in the embodiment of the present invention, beam direction is determined in base station;
The structure chart that Fig. 4 is base station in the embodiment of the present invention;
The structure chart that Fig. 5 is transit equipment communicator in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, beam forming technique provided by the present invention and base station are described in detail.
The fundamental diagram that accompanying drawing 1 is mimo system, wherein:
Wherein S is the input modulated symbol,
for beam forming transmitting terminal weighing vector, it is loaded into N
ton individual transmitting antenna, through mimo channel, by N
rthe reception antenna of individual array element receives, and via one group of merging weighing vector Z corresponding with W
*merge.Receiving terminal can be by the channel state feedback of self to transmitting terminal when being processed to received signal, and transmitting terminal can utilize this information to adjust weighing vector W.
As mentioned above, send beam forming and usually suppose to make a start to have certain channel condition information, under some condition, transmitting terminal can be estimated the descending characteristic of channel by the reciprocity of link.When channel does not have reciprocity, just can utilize above-mentioned feedback information (being that receiving terminal is quantized channel information and by the arrowband feedback channel, it fed back to the information of transmit port) to adjust the weighing vector of beam forming.
Referring to accompanying drawing 2, the embodiment of the present invention provides a kind of method of beam forming, comprising:
201, base station receives the positional information that transit equipment enters the described transit equipment sent behind the community of described base station covering; Described base station receives the velocity information that transit equipment enters the described transit equipment sent behind the community of described base station covering;
203, described base station is according to positional information and the velocity information of the described transit equipment received, and determines the parameter of the wave beam that described base station will send in conjunction with corresponding Delay, adjusts the direction of transmission wave beam;
205, described base station sends described wave beam according to the direction of described definite wave beam to described transit equipment.
In another one embodiment of the present invention, described base station is according to positional information and the velocity information of the described transit equipment received and determine the parameter of the wave beam that described base station will send in conjunction with corresponding Delay, adjusts the direction of transmission wave beam, comprising:
Described base station is according to positional information and the velocity information of the described transit equipment received, determine Delay, calculate and definite emission angle parameter, adjust the beam direction that described base station will send, wherein said Delay is carved into described base station and sends the time difference of wave beam between the moment while referring to described transit equipment from the transmission positional information.
In another one embodiment of the present invention, described base station receives the positional information that transit equipment enters the described transit equipment sent behind the community of described base station covering, comprising:
After described transit equipment enters into the community of described base station covering, send the positional information of a transit equipment to described base station every a systemic presupposition time interval d1;
Described base station receives the positional information that described transit equipment sends.
In another one embodiment of the present invention, described base station receives the speed that transit equipment enters the described transit equipment sent behind the community of described base station covering, comprising:
After described transit equipment enters the community of described base station covering, send the speed of a transit equipment every a systemic presupposition time interval d2;
Described base station receives the velocity information that described transit equipment sends.
In another one embodiment of the present invention, described base station is according to positional information, the speed of the described transit equipment received, and Delay, determines the direction of the wave beam that described base station will send, and comprising:
Wherein, base station and transit equipment geographical location information determine that transit equipment is θ with respect to the azimuth, base station
gPS, t
1+ t
2+ Δ t is that described transit equipment sends the time difference of wave beam from sending positional information to described base station, and d is the vertical height of base station with respect to transit equipment,
for the definite beam forming direction in base station.
In another one embodiment of the present invention, described positional information is the transit equipment current location information.
The method that adopts the embodiment of the present invention to provide, corresponding Delay can be calculated according to position and the speed of the transit equipment of high-speed cruising in base station, the direction that accurately compute beam is shaped, and send to transit equipment, guaranteed the precision of wave beam transmission.
The beam-forming method that the embodiment of the present invention provides, take multiaerial system as prerequisite, and the method comprises:
S1), transit equipment enters the real-time position information of Hou，Xiang base station, the community report transit equipment of base station covering;
In embodiments of the present invention, be to tell that the transit equipment of advancing is that example describes.Wherein, transit equipment is also to communicate with base station by the communication terminal of its setting is next, and therefore to a certain extent, transit equipment can be regarded the user terminal of a high-speed mobile as.Under other similar environment, as bus, coach, or subway, the transit equipments such as light rail, if similar communication terminal, the method that also can adopt this inventive embodiments to provide also have been provided above it.
Wherein, in embodiments of the present invention, transit equipment, to the real-time position information of base station report transit equipment, specifically can comprise:
After transit equipment enters the community that base station covers, can be with the interval of the single-candidate of a systemic presupposition to the base station reporting position information, as, at interval of 1 second (s), just to base station, report once, also can to base station, report once at interval of 10 milliseconds; Also can be at Nei Xiang base station, the interval reporting position information of single-candidate not, as according to arranging, reported at random the real-time position information of transit equipment to base station.
Wherein, the positional information that transit equipment reports can be the geographical location information of GPS location, as longitude and latitude information, concrete as 120 ° of east longitudes, 48 ° of north latitude etc.
Preferably, transit equipment, after entering community, is reported a positional information best results every the time interval of a systemic presupposition to base station.
S2), transit equipment enters the speed of service of Hou，Xiang base station, the community report transit equipment of base station covering;
In embodiments of the present invention, transit equipment reports the speed of service of transit equipment to base station, can be specifically:
Transit equipment, when reporting position information, reports the speed of service of himself together; Perhaps transit equipment every regular time interval report the speed of its operation to base station, as 10ms or 30ms etc.; Perhaps transit equipment is when speed changes, the speed after reporting it to change to base station etc.
Wherein, at step S1, in S2, after transit equipment enters the overlay area of this base station, this base station can send broadcast to the communicator on this transit equipment, the communicator of this transit equipment, according to the broadcast received, determines that transit equipment has entered a Ge Xin community, as the tracking area according in broadcast, knows and has entered a Ge Xin community.
In addition, in step S1 and/or S2, base station has found that this transit equipment has entered the overlay area of oneself, can initiatively require transit equipment to report himself positional information and/or velocity information; Certainly, in another situation, after transit equipment is found to have entered the overlay area of a new base station, also can initiatively to base station, report self positional information and/or velocity information.
S3), after base station receives the real-time position information that transit equipment sends, determine the initial position of transit equipment in this base station coverage area;
Wherein, after transit equipment sends to base station by the geographical location information of himself, base station is according to the geographical location information of transit equipment, and self residing geographical location information, can calculate horizontal range and the vertical range of transit equipment apart from base station, and then get the initial position of transit equipment in this base station coverage cell.As horizontal range and the vertical range apart from base station according to transit equipment, can calculate transit equipment with respect to the base station azimuth angle theta
gPS.
S4), the speed of service of the base station initial position message in community, transit equipment according to transit equipment and corresponding Delay are determined beam direction.
In embodiments of the present invention, transit equipment is to before the positional information of transmission geographical position, base station, communication channel is set up in needs elder generation and base station, and just can send to base station after geographical location information need to being encoded, after base station receives this information, just can get the positional information of transit equipment through decoding, the initial position of this transit equipment in base station coverage area determined according to the geographical location information of transit equipment in base station simultaneously, therefore transit equipment receives to base station from the geographical location information that sends self, there is certain time delay centre, can be defined as uplink time delay: be t
1, in addition,, according to the positional information of transit equipment, the direction that speed per hour is determined wave beam, also there is certain time delay base station, as phase array, adjusts the time delay of each array element weight coefficient, is defined as Δ t, base station is determined the direction of wave beam and sent wave beam to transit equipment also certain time delay, is defined as descending time delay t
2.Now ignore the time that wave beam transmits in wireless environment.
Therefore, the wave beam of preparing to send to base station to the geographical location information of base station transmission self from transit equipment is aimed at transit equipment, has t
1+ t
2the time difference of+Δ t.
As shown in Figure 3, determine that by base station and transit equipment geographical location information transit equipment is with respect to the base station azimuth angle theta
gPS, by real-time speed and cell structure, can determine that the azimuth after correction is
final wave beam aligning direction is
Its concrete account form is:
Wherein,
be the orientation angle that wave beam that base station calculates need to be aimed at.
S5), base station sends wave beam according to determined wave beam aligning direction to this transit equipment.
In the above-described embodiments, under the environment of high-speed railway, the manufacturing process of wave beam does not rely on the channel information with the receiving terminal feedback, but by adopting the method for location, position, in conjunction with the transit equipment speed of service, and consider corresponding time delay, and then adaptive adjustment beam direction, reach and reduce error, improve the purpose of beam position accuracy.
Referring to accompanying drawing 4, the embodiment of the present invention provides a kind of base station, comprising:
Receiving element 402, the positional information that enters the described transit equipment sent behind the community of base station covering for receiving transit equipment; Receive the speed that described transit equipment enters the described transit equipment sent behind the community of described base station covering;
Processing unit 404, for the Delay in conjunction with corresponding, and positional information, the velocity information of the described transit equipment that receives of described receiving element 402, determine the direction of the wave beam that described base station will send,
Transmitting element 406, send described wave beam according to described definite beam direction to described transit equipment.
In another one embodiment of the present invention, described processing unit 404 is specifically for positional information and the velocity information of the described transit equipment according to receiving, determine Delay, calculate and definite emission angle parameter, adjust the beam direction that described base station will send, wherein said Delay is carved into described base station and sends the time difference of wave beam between the moment while referring to described transit equipment from the transmission positional information.
The base station that the embodiment of the present invention provides, can be according to the positional information of transit equipment, and velocity information and corresponding Delay calculate, the direction of the wave beam that need to send to this transit equipment, and send wave beam according to this direction to this transit equipment.
With reference to accompanying drawing 5,, another one embodiment of the present invention provides a kind of transit equipment communicator, wherein on this transit equipment communicator, is provided with a communication terminal, and wherein, described communication terminal comprises:
Transmitting element 501, when entering the community that base station covers when described transit equipment communicator, send the positional information of described transit equipment to described base station, send the velocity information of described transit equipment to described base station;
Receiving element 502, the wave beam sent for receiving described base station, the wave beam that wherein said base station sends is positional information, the velocity information of described base station according to the described described transit equipment received, and determine in conjunction with corresponding Delay.
In another one embodiment of the present invention,
Described transmitting element 501, behind the community that enters the covering of described base station at described transit equipment, every a systemic presupposition time interval d
1send the positional information of described transit equipment to described base station.
In another one embodiment of the present invention,
Described transmitting element 501, behind the community that enters the covering of described base station at described transit equipment, every a systemic presupposition time interval d
2send the velocity information of described transit equipment to described base station.
In another one embodiment of the present invention, described transit equipment comprises motor-car, train, inter-city train, high ferro, coach, bus, steamer, subway or light rail etc.This transit equipment needs frequently and information interaction is carried out in base station.
The transit equipment communicator that the embodiment of the present invention provides, can offer base station by the positional information of self and velocity information in time, and the beam angle sent to this transit equipment just can be determined according to these information in base station like this, improves the transmission precision of wave beam.
It is more than preferably execution mode of one of the embodiment of the present invention, anyone is under the prerequisite of skilled, do not deviating from spirit of the present invention and do not exceeding under the prerequisite of the technical scope the present invention relates to, the details that can describe the present invention is done various supplementing and modification.Protection scope of the present invention is not limited to the cited scope of embodiment, and protection scope of the present invention is as the criterion with claim.
Claims (11)
1. the method for a beam forming, is characterized in that, comprising:
Base station receives the positional information that transit equipment enters the described transit equipment sent behind the community of described base station covering; Described base station receives the velocity information that described transit equipment enters the described transit equipment sent behind the community of described base station covering;
Described base station is according to positional information and the velocity information of the described transit equipment received, and determines the parameter of the wave beam that described base station will send in conjunction with corresponding Delay, adjusts the direction of transmission wave beam;
Described base station sends described wave beam according to described definite beam direction to described transit equipment.
2. beam-forming method according to claim 1, is characterized in that, described base station receives the positional information that the transit equipment communicator enters the described transit equipment sent behind the community of described base station covering, comprising:
After described transit equipment enters into the community of described base station covering, every a systemic presupposition time interval d
1send the positional information of a transit equipment to described base station;
Described base station receives the positional information that described transit equipment sends.
3. beam-forming method according to claim 1, is characterized in that, described base station receives the velocity information that transit equipment enters the described transit equipment sent behind the community of described base station covering, comprising:
After described transit equipment enters the community of described base station covering, every a systemic presupposition time interval d
2send the velocity information of a transit equipment to described base station;
Described base station receives the velocity information that described transit equipment sends.
4. beam-forming method according to claim 1, it is characterized in that, described base station is according to positional information and the velocity information of the described transit equipment received, and determines the parameter of the wave beam that described base station will send in conjunction with corresponding Delay, adjust the direction that sends wave beam, comprising:
Described base station is according to positional information and the velocity information of the described transit equipment received, determine Delay, calculate and definite emission angle parameter, adjust the beam direction that described base station will send, wherein said Delay is carved into described base station and sends the time difference of wave beam between the moment while referring to described transit equipment from the transmission positional information.
5. according to the arbitrary described beam-forming method of claim 1 to 4, it is characterized in that the transit equipment current location information of described positional information for being obtained by location positioning system.
6. a base station, is characterized in that, comprising:
Receiving element, the positional information that enters the described transit equipment sent behind the community of base station covering for receiving transit equipment; Receive the velocity information that described transit equipment enters the described transit equipment sent behind the community of described base station covering;
Processing unit, for the Delay in conjunction with corresponding, and positional information and the velocity information of the described transit equipment that receives of described receiving element, determine the parameter of the wave beam that described base station will send, and adjusts the direction that sends wave beam
Transmitting element, send described wave beam according to described definite beam direction to described transit equipment.
7. base station as claimed in claim 6, is characterized in that,
Described processing unit is specifically for positional information and the velocity information of the described transit equipment according to receiving, determine Delay, calculate and definite emission angle parameter, adjust the beam direction that described base station will send, wherein said Delay is carved into described base station and sends the time difference of wave beam between the moment while referring to described transit equipment from the transmission positional information.
8. a transit equipment communicator, is characterized in that, comprises a communication terminal, and wherein, described communication terminal comprises:
Transmitting element, when entering the community that base station covers when described transit equipment communicator, send the positional information of described transit equipment to described base station, send the velocity information of described transit equipment to described base station;
Receiving element, the wave beam sent for receiving described base station, the beam direction that wherein said base station sends is positional information, the velocity information of described base station according to the described described transit equipment received, and determine in conjunction with corresponding relevant Delay.
9. transit equipment communicator according to claim 8, is characterized in that,
Described transmitting element, behind the community that enters the covering of described base station at described transit equipment communicator, every a systemic presupposition time interval d
1send the positional information of described transit equipment to described base station.
10. transit equipment communicator according to claim 8, is characterized in that,
Described transmitting element, behind the community that enters the covering of described base station at described transit equipment communicator, every a systemic presupposition time interval d
2send the velocity information of described transit equipment to described base station.
11. according to Claim 8 to 10 arbitrary described communications and transportation device, it is characterized in that, described transit equipment comprises motor-car, train, inter-city train, high ferro, coach, bus, steamer, subway or light rail.
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| CN201110346614.1A CN103095356B (en) | 2011-11-04 | 2011-11-04 | A kind of beam-forming method, base station and traffic transport device |
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| CN105099534A (en) * | 2015-08-22 | 2015-11-25 | 西安电子科技大学 | Positioning information assistance-based massive multi-input multi-output beamforming method |
| CN105634578A (en) * | 2015-12-29 | 2016-06-01 | 九派逐浪（北京）网络通讯技术股份有限公司 | Beam forming device, intelligent antenna and wireless communication equipment |
| CN106027131A (en) * | 2016-07-25 | 2016-10-12 | 清华大学 | Base station and beam forming method |
| CN106604293A (en) * | 2015-10-15 | 2017-04-26 | 英特尔Ip公司 | Wireless gigabit-enabled device configuration |
| 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 |
| CN107409344A (en) * | 2015-03-17 | 2017-11-28 | 诺基亚技术有限公司 | Wireless routing |
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| CN107409344A (en) * | 2015-03-17 | 2017-11-28 | 诺基亚技术有限公司 | Wireless routing |
| CN105099534A (en) * | 2015-08-22 | 2015-11-25 | 西安电子科技大学 | Positioning information assistance-based massive multi-input multi-output beamforming method |
| CN106604293B (en) * | 2015-10-15 | 2020-08-28 | 英特尔Ip公司 | Device configuration with wireless gigabit capability |
| CN106604293A (en) * | 2015-10-15 | 2017-04-26 | 英特尔Ip公司 | Wireless gigabit-enabled device configuration |
| 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 |
| CN105634578A (en) * | 2015-12-29 | 2016-06-01 | 九派逐浪（北京）网络通讯技术股份有限公司 | Beam forming device, intelligent antenna and wireless communication equipment |
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| CN110944382A (en) * | 2018-09-25 | 2020-03-31 | 北京展讯高科通信技术有限公司 | Positioning method of user terminal, base station and computer readable storage medium |
| CN110944382B (en) * | 2018-09-25 | 2021-03-09 | 北京紫光展锐通信技术有限公司 | Positioning method of user terminal, base station and computer readable storage medium |
| WO2020173327A1 (en) * | 2019-02-28 | 2020-09-03 | 维沃移动通信有限公司 | Coverage adjustment method and wireless access network node |
| CN111436053B (en) * | 2019-02-28 | 2022-07-08 | 维沃移动通信有限公司 | Coverage area adjusting method and wireless access network node |
| CN111436053A (en) * | 2019-02-28 | 2020-07-21 | 维沃移动通信有限公司 | Coverage area adjusting method and wireless access network node |
| CN113131978A (en) * | 2019-12-30 | 2021-07-16 | 大唐移动通信设备有限公司 | Precoding matrix configuration method and device based on channel reciprocity |
| CN113131978B (en) * | 2019-12-30 | 2022-04-19 | 大唐移动通信设备有限公司 | Precoding matrix configuration method and device based on channel reciprocity |
| CN111565060A (en) * | 2020-04-14 | 2020-08-21 | 中国联合网络通信集团有限公司 | Beam forming method and antenna equipment |
| CN114285442A (en) * | 2021-12-31 | 2022-04-05 | 南京国博电子股份有限公司 | Beam tracking method based on train position triggering |
| CN114285442B (en) * | 2021-12-31 | 2023-10-13 | 南京国博电子股份有限公司 | Beam tracking method based on train position triggering |
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