CN103199906B - The method for spacial multiplex that millimeter wave high-speed communication system beam sector is intercepted - Google Patents
The method for spacial multiplex that millimeter wave high-speed communication system beam sector is intercepted Download PDFInfo
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Abstract
The invention discloses the method for spacial multiplex that a kind of millimeter wave high-speed communication system beam sector is intercepted, when the equipment participating in Wave beam forming sends training sequence, other equipment intercept signal with omnidirectional antenna pattern, and set up a table according to the intercepted result of each sector of transmitting apparatus; Equipment is when asking SP, and the best transmission sector that respective Wave beam forming is obtained and the sector of this locality are intercepted table and be reported to PCP/AP.These information store by PCP/AP, table is intercepted in the sector that such PCP/AP has the equipment that all needs communicate in SP, PCP/AP when indicating equipment does not carry out spatial reuse measurement, can obtain the disturbed condition between link, thus effective link of selecting carries out spatial reuse.
Description
Technical field
The present invention relates to the method for spacial multiplex that millimeter wave high-speed communication system beam sector is intercepted, belong to the communication technology.
Background technology
WPAN(WirelessPersonalAreaNetwork, Wireless Personal Network) be a kind of emerging communication network, be also one of current network field with the fastest developing speed.Its proposition is to realize the cordless communication network technology that radius of action is little, type of service is enriched, connect towards special group, wireless seamless.The problem that it can solve effectively " last several meters of cables ".Along with the progress of technology, radio communication device sharp increase, various handheld communication devices occurs in succession, grows with each passing day to the short-distance transmission demand of multimedia application.This demand makes wireless short-range communication must can provide higher transmission rate and communication efficiency.The research of ultrahigh speed Wireless Personal Network is paid close attention in increasing research.
Along with the opening in succession of 57-67GHz unlicensed spectrum in world wide, this frequency range has become maximum continuous open spectrum resource.This section of frequency spectrum is compared with current normally used 5.8GHz frequency range, and bandwidth is greatly improved, and the transmission rate of data also can obtain lifting at double accordingly.In recent years, the silicon of low cost and CMOS chip are also proved to be able to support 60GHz technology, and the issue of existing Related product.
Except high bandwidth, outside two-forty and low cost, 60GHz also has other advantages to be applicable to wireless personal area Network Communication.60GHz signal has high Decay Rate, good in anti-interference performance, and communication performance is stablized, and is very applicable to short haul connection.Because wavelength is at about 5mm, antenna element small-sized, can be integrated in multiple antenna on the chip of transceiver easily, and intelligent antenna technology so just can be utilized to produce narrower beamwidth, thus reach high link budget, form the directional transmissions of signal.
Space multiplexing technique allows multilink under same channel, transmits simultaneously.The high Decay Rate of 60GHz signal and directional transmissions characteristic, compared to traditional omni-direction transmissions, can provide larger spatial multiplex gains, thus greatly improve throughput and the efficiency of transmission of system.
As shown in Figure 1, equipment is by multi-antenna technology, and can form multiple transmission sector, each transmission sector has different antenna gains in a different direction for Millimeter-wave Wireless Communication System: model.
In IEEE802.11ad draft standard, channel access is at multiple BI(BeaconInterval, beacon interval) innerly to carry out.Each BI is divided into again multiple access periods, a BI mainly comprises BTI(BeaconTransmissionInterval, beacon transmission interval), A-BFT(AssociationBeamformingTraining, cooperative beam forms training), AT(AnnouncementTimePeriod, notification time) and DTT(DataTransferTime, data transmission period).Wherein, DTT by several CBAP(Contention-basedAccessPeriods, the access periods based on competition) and SP(ServicePeriods, the period of service) composition, in DTT, equipment room carries out the transmission of Frame.
Before spatial reuse, equipment between need to carry out beamforming training, make equipment use best sector to communicate in a subsequent communication, with obtain link maximum gain improve communication quality.At directive sending, in the Wave beam forming that omnidirectional receives, Wave beam forming is mainly through sending sector scanning to determine that the best of equipment sends sector.Transmitting apparatus uses different sectors to send wave beam training sequence successively, and receiving equipment with omnidirectional antenna pattern receive signal, and feeds back to transmitting apparatus the transmission sector number corresponding to the peak signal received.
The equipment communicated in SP communicates to the best sector using Wave beam forming to obtain, the transmission of equipment in SP simultaneously needs PCP/AP(PBSSControlPoint/AccessPoint, individual's basic service set control point/accessing points,) dispatch, if there is multipair link request SP, PCP/AP requires that equipment performs the measurement to frequency spectrum and Radio Resource, and reports the result, and whether can carry out spatial reuse to assess under present interference situation.At this, the service time of having distributed is designated as SP
e, will with SP
ecarry out space share measure assessment service time be the candidate service time, be designated as SP
c.Multiple SP can be had
eand SP
c.PCP/AP instruction distribute time slot measure for equipment in SP after the source device of SP and object equipment complete beamforming training.Fig. 2 is the schematic diagram of interferometry between equipment.
First, SP
ein two equipment use successively the best of Wave beam forming send wave beam send, SP
cin equipment intercept, result feedback will be disturbed to PCP/AP, in like manner, SP
cin equipment send, SP
ein equipment intercept, and interference result feedback to PCP/AP, PCP/AP according to channel quality assessment information and feedback information, determine whether allow link carry out spatial reuse.
PCP/AP, when carrying out spatial reuse and distributing, needs the interfere information of contribution link whether can carry out spatial reuse to assess link.PCP/AP Stochastic choice link carries out the measurement of spatial reuse respectively in follow-up SP, and the success rate of this Stochastic choice is very low, and the SP that can carry out spatial reuse can not be allowed to carry out multiplexing fully, and the throughput of system can not obtain due lifting.Extra Frame switch can be produced simultaneously in the process measured, reduce the communication efficiency of whole system.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the method for spacial multiplex that a kind of millimeter wave high-speed communication system beam sector is intercepted
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The method for spacial multiplex that millimeter wave high-speed communication system beam sector is intercepted, comprises sector and intercepts table forming step, and note asks two equipment carrying out communicating to be respectively source device and object equipment, and this step specifically comprises:
(a1) period initial value i=0 is set;
(a2) the i-th sector of source device sends beamforming training sequence, obtains the best of mating with object equipment and sends sector and feed back to PCP/AP, and wherein, M is sector sum, 0≤i≤M;
(a3) under the i-th sector beam of source device forms training signal, object equipment and other equipment intercept signal with omnidirectional antenna pattern, and will signal be intercepted and interference threshold compares: if intercept signal to be greater than interference threshold, then the value sector of this equipment being intercepted the i-th sector of corresponding source device in table is set to " Y "; If intercept signal to be less than or equal to interference threshold, then the value sector of this equipment being intercepted the i-th sector of corresponding source device in table is set to " N ";
(a4) judge whether i<M-1 sets up: if set up, then i=i+1, returns step (a2); Otherwise terminate;
(a5) step (a1) is repeated to (a4), until all devices is all as a source device; The sector forming each equipment is intercepted and is shown and feed back to PCP/AP.
Preferably, also comprise PCP/AP and intercept table according to the best transmission sector and sector, judge the current time SP of distribution services
ewith candidate service time SP
ccan de-multiplexing steps, remember the current time SP of distribution services
etwo interior equipment are device A and equipment B, candidate service time SP
ctwo interior equipment are equipment C and equipment D, and this step specifically comprises:
(b1) PCP/AP searches the best transmission sector ID of the best transmission sector ID, equipment C and the equipment D of device A and equipment B;
(b2) table is intercepted, for the SP that equipment x is not positioned in the sector that PCP/AP reference device x feeds back
eor SP
ctwo interior equipment, two values evenly " N ", then flag that the transmission sector ID that these two equipment use is corresponding
x=1, no person flag
x=0; Wherein, equipment x is device A, equipment B, equipment C or equipment D;
(b3) PCP/AP judges FLAG=flag
aflag
bflag
xflag
yvalue whether be 1, if so, then SP
ewith this SP
ccan spatial reuse be carried out, otherwise SP
ewith this SP
cspatial reuse cannot be carried out.
The equipment of the present invention described by IEEE802.11ad or IEEE802.15.3c standard is during beamforming training, when the equipment participating in Wave beam forming sends training sequence, other equipment intercept signal with omnidirectional antenna pattern, and according to the intercepted result of each sector of transmitting apparatus being set up to a table (being called that table is intercepted in sector).Equipment is when asking SP, and the best transmission sector that respective Wave beam forming is obtained and the sector of this locality are intercepted table and be reported to PCP/AP.These information store by PCP/AP, table is intercepted in the sector that such PCP/AP has the equipment that all needs communicate in SP, PCP/AP when indicating equipment does not carry out spatial reuse measurement, can obtain the disturbed condition between link, thus effective link of selecting carries out spatial reuse.
The present invention is mainly applicable to the millimeter-wave communication system being carried out Wave beam forming by beam switchover used in millimetre-wave attenuator.Adopt the present invention, PCP/AP can not undertaken on the extra basis measured by equipment, the best used in SP according to equipment feedback sends sector ID and table is intercepted in the local sector generated, obtain the information that assessment spatial reuse uses, thus select the link that can carry out spatial reuse fast.Adopt the present invention can increase the throughput of system, improve the communication efficiency of system.
In the present invention, whether sector is intercepted in table and is impacted other sectors with certain sector of multidimensional data format record equipment, and these information may be used for follow-up spatial reuse and measure feedback.Along with the cost of memory cell is more and more lower, and storing the raising of reading and writing data speed, communication equipment can store more extraneous information (as sector ID, SNR etc.) for subsequent communications, thus reduce some unnecessary Frame switch etc., improve communication efficiency.
Beneficial effect: the method for spacial multiplex that millimeter wave high-speed communication system beam sector provided by the invention is intercepted, on the basis of traditional Wave beam forming, sector interception information when other equipment to be carried out in this locality Wave beam forming by equipment is recorded to a sector and intercepts in table, and after the beam forming the sector ID of the use of Wave beam forming and sector are intercepted table and be reported to PCP/AP, the information that PCP/AP can directly be intercepted in table according to Wave beam forming information and sector selects the link that can carry out space hair fast.The present invention's utilize extra information to help assessment that PCP/AP carries out spatial reuse between SP, avoid the blindness of existing Scheme Choice spatial reuse SP, the probability that finally effectively can carry out spatial reuse is increased, improves the communication efficiency of spatial multiplex gains and system.
Accompanying drawing explanation
Fig. 1 is millimeter wave Wireless Personal Network schematic diagram;
Fig. 2 is spatial reuse interferometry schematic diagram;
Fig. 3 is directional antenna model;
Fig. 4 is that link device sector covers schematic diagram;
Fig. 5 is that table product process figure is intercepted in the sector of equipment;
Fig. 6 is that table and Wave beam forming table are intercepted in the sector that equipment generates, table is intercepted in the sector that wherein 6 (a) is device A, table is intercepted in the sector that 6 (b) is equipment B, table is intercepted in the sector that 6 (c) is equipment C, table is intercepted in the sector that 6 (d) is equipment D, table is intercepted in the sector that 6 (e) is equipment E, and 6 (f) is for intercepting table in the sector of equipment F;
The best that Fig. 7 uses for devices communicating sends sector ID;
Fig. 8 is that PCP/AP selects spatial reuse link flow chart.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
For without loss of generality, the antenna model that this case uses as shown in Figure 3, is imperfect antenna model, namely has mutual covering between sector, and in figure, shade is antenna sidelobe overlay area, and blank sector scope is main lobe overlay area, is also ideal antenna overlay area.The application scenarios of this case as shown in Figure 4, comprises a main control device as telegon (PCP/AP) and 6 subsets (DEV) and sector thereof and distributes (M sector, M=8) in 60GHz wireless network.In this scene, device A request communicates with equipment B, is arranged in SP
emiddle communication, equipment C request communicates with equipment B, and equipment E request communicates with equipment F, respectively at SP
c1and SP
c2in.
Table forming step is intercepted in sector, and for the Wave beam forming (in this example, device A is for source device, equipment for the purpose of equipment B) of device A and equipment B, equipment C is identical with equipment F with equipment D, equipment E, specifically comprises:
(a1) period initial value i=0 is set;
(a2) the i-th sector of device A sends beamforming training sequence, obtains the best of mating with equipment B and sends sector and feed back to PCP/AP, and wherein, M is sector sum, 0≤i≤M;
(a3) under the i-th sector beam of device A forms training signal, equipment B, equipment C, equipment D, equipment E and equipment F intercept signal with omnidirectional antenna pattern, and will signal be intercepted and interference threshold compares: if intercept signal to be greater than interference threshold, then the value sector of this equipment being intercepted i-th sector of corresponding source device A in table is set to " Y "; If intercept signal to be less than or equal to interference threshold, then the value sector of this equipment being intercepted i-th sector of corresponding source device A in table is set to " N ";
(a4) judge whether i<M-1 sets up: if set up, then i=i+1, returns step (a2); Otherwise terminate.
(a5) step (a1) is repeated to (a4), until all devices is all as a source device; The sector forming each equipment is intercepted and is shown and feed back to PCP/AP.
Said process can use flow chart shown in Fig. 5 to represent, when channel change need to re-start Wave beam forming time, each equipment all needs to intercept table by above-mentioned steps to upgrade local sector, thus ensures that the sector of sector ID and correspondence that every secondary device feeds back to PCP/AP is intercepted table and met communications link condition.
After all devices completes Wave beam forming, table is intercepted as shown in Figure 6 in the sector that equipment stores, with the best sector ID used during other devices communicatings as shown in Figure 7, when table and equipment and other devices communicatings are intercepted in sector by all devices, the best sector ID that uses feeds back to PCP/AP.PCP/AP will judge SP
ewhether can with other SP
ccarry out spatial reuse; In this example, PCP/AP is with the best sector ID used in communication for index, and find out sector and to intercept in table corresponding sector to the interference value of corresponding device, according to interference value, PCP/AP can evaluate the interference result between SP rapidly, select can with current SP
ecarry out the SP of spatial reuse
c; For SP
ecan with SP
c1carry out spatial reuse, the step that carry out is as follows:
(b1) PCP/AP searches the best transmission sector ID of the best transmission sector ID, equipment C and the equipment D of device A and equipment B; In this example, the sector ID that (A, B) that Wave beam forming obtains uses is (1,6) respectively; The sector ID that (C, D) uses is (3,1) respectively;
(b2) table is intercepted, for the SP that equipment x is not positioned in the sector that PCP/AP reference device x feeds back
eor SP
c1two interior equipment, two values evenly " N ", then flag that the transmission sector ID that these two equipment use is corresponding
x=1, no person flag
x=0; Wherein, equipment x is device A, equipment B, equipment C or equipment D; In this example, the value that on equipment C, table (A, B) equipment (1,6) sector is intercepted corresponding in sector is (Y, N), flag
c=0; The value that on equipment D, table (A, B) equipment (1,6) sector is intercepted corresponding in sector is (N, Y), flag
d=0; The value that in device A, table (C, D) equipment (3,1) sector is intercepted corresponding in sector is (Y, N), flag
a=0; The value that in equipment B, table (C, D) equipment (3,1) sector is intercepted corresponding in sector is (N, Y), flag
b=0;
(b3) PCP/AP judges FLAG=flag
aflag
bflag
xflag
yvalue whether be 1, if so, then SP
ewith this SP
ccan spatial reuse be carried out, otherwise SP
ewith this SP
cspatial reuse cannot be carried out; In this example, FLAG=flag
aflag
bflag
xflag
y=0, then SP is described
ecan not with SP
c1carry out spatial reuse.
In this example, PCP/AP calculates the FLAG=0 of the link that (A, B) forms with (C, D), and PCP/AP assesses SP
ecan not with SP
c1in equipment carry out spatial reuse.(E, F) is replaced (C, D) and repeats above-mentioned steps, obtain FLAG=1, i.e. SP
eenergy and SP
c2in equipment carry out spatial reuse, the result of last spatial reuse is SP
ewith SP
c2carry out spatial reuse.
Said process can represent with flow chart as shown in Figure 8.By this process, PCP/AP can directly select can with SP
ecarry out the SP of spatial reuse
c.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. the millimeter wave high-speed communication system beam sector method for spacial multiplex of intercepting, is characterized in that: comprise sector and intercept table forming step, and note asks two equipment carrying out communicating to be respectively source device and object equipment, and this step specifically comprises:
(a1) period initial value i=0 is set;
(a2) the i-th sector of source device sends beamforming training sequence, obtains the best of mating with object equipment and sends sector and feed back to PCP/AP, and wherein, M is sector sum, 0≤i≤M;
(a3) under the i-th sector beam of source device forms training signal, object equipment and other equipment intercept signal with omnidirectional antenna pattern, and will signal be intercepted and interference threshold compares: if intercept signal to be greater than interference threshold, then the value sector of this equipment being intercepted the i-th sector of corresponding source device in table is set to " Y "; If intercept signal to be less than or equal to interference threshold, then the value sector of this equipment being intercepted the i-th sector of corresponding source device in table is set to " N ";
(a4) judge whether i<M-1 sets up: if set up, then i=i+1, returns step (a2); Otherwise terminate;
(a5) step (a1) is repeated to (a4), until all devices is all as a source device; The sector forming each equipment is intercepted and is shown and feed back to PCP/AP;
Also comprise PCP/AP and intercept table according to the best transmission sector and sector, judge the current time SP of distribution services
ewith candidate service time SP
ccan de-multiplexing steps, remember the current time SP of distribution services
etwo interior equipment are device A and equipment B, candidate service time SP
ctwo interior equipment are equipment C and equipment D, and this step specifically comprises:
(b1) PCP/AP search device A the best send sector ID be a, the best of equipment B send sector ID be b, the best of equipment C send sector ID be c, the best of equipment D send sector ID be d;
(b2) table is intercepted, for the SP that equipment x is not positioned in the sector that PCP/AP reference device x feeds back
eor SP
cin two equipment, two values corresponding to the transmission sector ID that these two equipment use are " N ", then flag
x=1, no person flag
x=0; Wherein, equipment x is device A, equipment B, equipment C or equipment D; Be specially:
If the sector of equipment C is intercepted in table, two values that the sector of the sector ID of device A to be the sector of a and the sector ID of equipment B be b is corresponding are " N ", then flag
c=1, no person flag
c=0;
If the sector of equipment D is intercepted in table, two values that the sector of the sector ID of device A to be the sector of a and the sector ID of equipment B be b is corresponding are " N ", then flag
d=1, no person flag
d=0;
If the sector of device A is intercepted in table, two values that the sector of the sector ID of equipment C to be the sector of c and the sector ID of equipment D be d is corresponding are " N ", then flag
a=1, no person flag
a=0;
If the sector of equipment B is intercepted in table, two values that the sector of the sector ID of equipment C to be the sector of c and the sector ID of equipment D be d is corresponding are " N ", then flag
b=1, no person flag
b=0;
(b3) PCP/AP judges FLAG=flag
aflag
bflag
cflag
dvalue whether be 1, if so, then SP
ewith this SP
ccan spatial reuse be carried out, otherwise SP
ewith this SP
cspatial reuse cannot be carried out.
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| CN103199906B true CN103199906B (en) | 2016-03-23 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015061949A1 (en) * | 2013-10-28 | 2015-05-07 | 华为技术有限公司 | Joint scheduling method and apparatus |
| CN103607231B (en) * | 2013-11-27 | 2017-03-01 | 上海电机学院 | The fast beam changing method of multiple antennas is utilized under high-speed mobile environment |
| CN103916943A (en) * | 2014-04-09 | 2014-07-09 | 东南大学 | Rate-self adaptive method under spatial multiplexing in millimeter wave high speed communication |
| CN104168658B (en) * | 2014-08-15 | 2017-12-22 | 青岛科技大学 | A kind of spatial reuse link scheduling method applied to millimeter wave WPAN networks |
| WO2016206007A1 (en) * | 2015-06-24 | 2016-12-29 | 华为技术有限公司 | Beam refinement method and apparatus |
| CN106922029B (en) | 2015-12-24 | 2020-11-06 | 华为技术有限公司 | Method and device for scheduling channel resources |
| CN106998558B (en) * | 2016-01-22 | 2020-04-28 | 华为技术有限公司 | Communication method, access point and station |
| CN105978614B (en) * | 2016-06-28 | 2019-05-31 | 东南大学 | A kind of millimeter-wave systems directional aerial method for spacial multiplex |
| CN106027216B (en) * | 2016-06-29 | 2019-04-19 | 江苏中兴微通信息科技有限公司 | The website dispatching method of wireless S2S communication system |
| CN109617586B (en) * | 2018-12-04 | 2021-05-14 | 重庆邮电大学 | Terahertz wireless personal area network rapid beam forming method based on position information |
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| CN101133670A (en) * | 2005-01-26 | 2008-02-27 | 松下电器产业株式会社 | Radio base station device and terminal device |
| CN102158967A (en) * | 2011-03-09 | 2011-08-17 | 华为技术有限公司 | Space multiplexing method, device and system for allocating transmission time slots for communication links |
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| US9806789B2 (en) * | 2010-04-06 | 2017-10-31 | Samsung Electronics Co., Ltd. | Apparatus and method for spatial division duplex (SDD) for millimeter wave communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101133670A (en) * | 2005-01-26 | 2008-02-27 | 松下电器产业株式会社 | Radio base station device and terminal device |
| CN102158967A (en) * | 2011-03-09 | 2011-08-17 | 华为技术有限公司 | Space multiplexing method, device and system for allocating transmission time slots for communication links |
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