CN103199906A - Spatial multiplexing method for intercepting millimeter wave high speed communication system wave beam sectors - Google Patents
Spatial multiplexing method for intercepting millimeter wave high speed communication system wave beam sectors Download PDFInfo
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- CN103199906A CN103199906A CN2013100807783A CN201310080778A CN103199906A CN 103199906 A CN103199906 A CN 103199906A CN 2013100807783 A CN2013100807783 A CN 2013100807783A CN 201310080778 A CN201310080778 A CN 201310080778A CN 103199906 A CN103199906 A CN 103199906A
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Abstract
The invention discloses a spatial multiplexing method for intercepting millimeter wave high speed communication system wave beam sectors. When a device participating wave beam forming transmits a training sequence, other devices intercept signals in an omnidirectional antenna mode, and a list is built according to interception results of all sectors of a transmitting device, when the devices request SP, interception lists of optimum transmitting sectors obtained by self wave beam forming and local sectors are reported to a PCP/AP. The PCP/AP stores the information, thereby having all the sector interception lists of the devices needing to communicate in the SP, and under the condition that the devices are not indicated to carry out spatial multiplexing measurement, the PCP/AP can obtain disturbed conditions among links, so that the links are effectively selected for carrying out spatial multiplexing.
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(Wireless Personal Area Network, Wireless Personal Network) be a kind of emerging communication network, also be one of current network field with the fastest developing speed.Its proposition be for realize that radius of action is little, type of service is abundant, towards the cordless communication network technology of special group, wireless seamless link.It can solve the problem of " last several meters cables " effectively.Along with development of technology, the radio communication device sharp increase, various handheld communication devices occur in succession, and the short-distance transmission demand of multimedia application is grown with each passing day.This demand makes wireless short-range communication that higher transmission rate and communication efficiency must be able to be provided.The research of ultrahigh speed Wireless Personal Network is paid close attention in increasing research.
Along with opening in succession of 57-67GHz unlicensed spectrum in the world wide, this frequency range has become maximum continuous open spectrum resource.This section frequency spectrum is compared with present 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, silicon and CMOS chip also are proved to be able to support the 60GHz technology cheaply, and the issue of existing Related product.
Except high bandwidth, outside two-forty and the low cost, 60GHz also has other advantages to be applicable to Wireless Personal Network communication.The 60GHz signal has high decay property, good in anti-interference performance, and communication performance is stable, is fit to very much short haul connection.Because wavelength is about 5mm, antenna element small-sized can be integrated in a plurality of antennas on the chip of transceiver easily, so just can utilize intelligent antenna technology to produce narrower beamwidth, thereby reach high link budget, form the directional transmissions of signal.
Space multiplexing technique allows multilink under same channel, transmits simultaneously.The height decay property of 60GHz signal and directional transmissions characteristic can provide bigger spatial reuse gain than traditional omni-direction transmissions, thereby greatly improve throughput and the efficiency of transmission of system.
Millimeter wave wireless communication system model as shown in Figure 1, equipment can form a plurality of transmissions sector by multi-antenna technology, each sends sector and has different antenna gains in different directions.
Channel inserts in a plurality of BI(Beacon Interval, beacon interval in the IEEE802.11ad draft standard) lining carries out.Each BI is divided into a plurality of access periods again, a BI mainly comprises BTI(Beacon Transmission Interval, beacon transmission interval), A-BFT(Association Beamforming Training, cooperative beam forms training), AT(Announcement Time Period, notification time) and DTT(Data Transfer Time, data transmission period).Wherein, DTT is by several CBAP(Contention-based Access Periods, based on the access periods of competition) and SP(Service Periods, the period of service) form, equipment room carries out the transmission of Frame in DTT.
Before spatial reuse, equipment between need to carry out wave beam and form training, make equipment in subsequent communications, use best sector to communicate, to obtain the maximum gain raising communication quality of link.At directive sending, during the wave beam that omnidirectional receives formed, wave beam formed main through sending sector scanning to determine the best transmission sector of equipment.Transmitting apparatus uses different sectors to send the wave beam training sequence successively, and receiving equipment receives signal with the omnidirectional antenna pattern, and the corresponding transmission sector number of peak signal that receives is fed back to transmitting apparatus.
The equipment of communicating by letter in SP communicates using wave beam to form the best sector that obtains, the transmission of equipment in SP simultaneously needs PCP/AP(PBSS Control Point/Access Point, individual's basic service set control point/accessing points,) dispatch, if have many to link request SP, PCP/AP requirement equipment is carried out the measurement to frequency spectrum and Radio Resource, and reports the result, to be evaluated under the current disturbed condition whether can carry out spatial reuse.At this, be designated as SP the service time of having distributed
e, will with SP
eBe the candidate service time service time of carrying out the shared measurement assessment in space, is designated as SP
cA plurality of SP can be arranged
eAnd SP
cPCP/AP the source device of SP and destination device finish wave beam form training after indication and in SP distribution time slot supply equipment measure.Fig. 2 is the schematic diagram of interferometry between the equipment.
At first, SP
eIn two equipment the best of using wave beam to form successively send wave beam and send SP
cIn equipment intercept, will disturb the result to feed back to PCP/AP, in like manner, SP
cIn equipment send SP
eIn equipment intercept, and disturbing a result to feed back to PCP/AP, PCP/AP determines whether allowing link to carry out spatial reuse according to channel quality assessment information and feedback information.
PCP/AP divides timing carrying out spatial reuse, needs the interfere information of contribution link to assess link and whether can carry out spatial reuse.PCP/AP selects link to carry out the measurement of spatial reuse respectively at random in follow-up SP, and this success rate of selecting at random is very low, and it is multiplexing to allow the SP that can carry out spatial reuse carry out fully, and the throughput of system can not obtain due lifting.In the process of measuring, can produce extra frame exchange simultaneously, 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 that the sector intercepts table and form step, and two equipment that the note request communicates are respectively source device and destination device, and this step specifically comprises:
(a1) set period initial value i=0;
(a2) the i sector of source device sends wave beam and forms training sequence, obtains the best of mating with destination device and sends the sector and feed back to PCP/AP, and wherein, M is the sector sum, 0≤i≤M;
(a3) the i sector beam at source device forms under the training signal, destination device and other equipment are intercepted signal with the omnidirectional antenna pattern, and will intercept signal and interference threshold compares: if intercept signal greater than interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device in the table is set to " Y "; If intercept signal smaller or equal to interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device in the table is set to " N ";
(a4) judge whether i＜M-1 sets up: if set up, then i=i+1 returns step (a2); Otherwise finish;
(a5) repeating step (a1) is to (a4), until all devices all as a source device; The sector that forms each equipment is intercepted table and is fed back to PCP/AP.
Preferably, comprise that also PCP/AP sends the sector according to the best and table is intercepted in the sector, judge the current time SP of distribution services
eWith candidate service time SP
cCan multiplexing step, 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 in the sector of PCP/AP reference device x feedback, the SP that is not positioned at for equipment x
eOr SP
cTwo interior equipment, two values of these two the employed transmission sector ID of equipment correspondences are " N ", then flag evenly
x=1, deny 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, SP then
eWith this SP
cCan carry out spatial reuse, otherwise SP
eWith this SP
cCannot carry out spatial reuse.
The present invention at IEEE 802.11ad or the described equipment of IEEE 802.15.3c standard at the wave beam training period that is shaped, when the equipment that participates in wave beam formation sends training sequence, other equipment are intercepted signal with the omnidirectional antenna pattern, and according to the intercepted result of each sector of transmitting apparatus being set up a table (be called the sector and intercept table).Equipment is in request during SP, separately wave beam formed the best that obtains send sector and local sector and intercept and show to report to PCP/AP.PCP/AP stores these information, table is intercepted in the sector of PCP/AP with all equipment that need communicate by letter in SP like this, PCP/AP can obtain the disturbed condition between link, thereby the effective choice link carry out spatial reuse under indicating equipment not carries out situation that spatial reuse measures.
The present invention is applicable to that mainly the wave beam that passes through that uses in the millimetre-wave attenuator switches the millimeter-wave communication system that carries out wave beam formation.Adopt the present invention, PCP/AP can not undertaken on the extra based measurement by equipment, the best of using among the SP according to the equipment feedback sends sector ID and table is intercepted in the local sector that generates, obtain assessing the employed information of spatial reuse, thereby select the link that can carry out spatial reuse fast.Employing the present invention can increase the throughput of system, improves the communication efficiency of system.
Whether the sector is intercepted in the table and other sectors is impacted with certain sector of multidimensional data format record equipment among the present invention, and these information can be used for follow-up spatial reuse and measure feedback.Along with the cost of memory cell is more and more lower, and the raising of storage reading and writing data speed, communication equipment can be stored more extraneous information (as sector ID, SNR etc.) and use for subsequent communications, thereby reduce some unnecessary frame exchanges 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 that traditional wave beam forms, in this locality other equipment are carried out the sector interception information of wave beam when forming is recorded to a sector and intercepts in the table by equipment, and intercept table in the sector ID that wave beam forms the use that the back forms wave beam with the sector and report to PCP/AP, the information that makes PCP/AP can be directly intercept in the table according to wave beam formation information and sector is selected the link that can carry out the space hair fast.The present invention utilizes extra information to help the assessment that PCP/AP carries out spatial reuse between SP, avoided the blindness of existing Scheme Choice spatial reuse SP, make the probability that can effectively carry out spatial reuse at last increase, improve the communication efficiency of spatial reuse gain and system.
Description of drawings
Fig. 1 is millimeter wave Wireless Personal Network schematic diagram;
Fig. 2 is spatial reuse interferometry schematic diagram;
Fig. 3 is the directional antenna model;
Fig. 4 is that chain pipeline equipment sector covers schematic diagram;
Fig. 5 intercepts table for the sector of equipment and generates flow chart;
Table and wave beam formation table are intercepted in the sector that Fig. 6 generates for equipment, wherein 6 (a) intercept table for the sector of device A, 6 (b) intercept table for the sector of equipment B, 6 (c) intercept table for the sector of equipment C, 6 (d) intercept table for the sector of equipment D, 6 (e) intercept table for the sector of equipment E, and 6 (f) intercept table for the sector of equipment F;
Fig. 7 is the employed best sector ID that sends of devices communicating;
Fig. 8 selects spatial reuse link flow chart for PCP/AP.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
For being without loss of generality, the employed antenna model of this case is imperfect antenna model as shown in Figure 3, and mutual covering is namely arranged between the sector, and shade is the antenna sidelobe overlay area among the figure, and blank Sector Range is the main lobe overlay area, also is the ideal antenna overlay area.The application scenarios of this case as shown in Figure 4, in the 60GHz wireless network, comprise a main control device as telegon (PCP/AP) and 6 subsets (DEV) and sector thereof distribute (M sector, M=8).In this scene, the device A request is communicated by letter with equipment B, is arranged in SP
eMiddle communication, equipment C request communicates with equipment B, and equipment E request and equipment F communicate, respectively at SP
C1And SP
C2In.
The sector is intercepted table and is formed step, forms example (device A is source device in this example, and equipment B is destination device) with the wave beam of device A and equipment B, and equipment C is identical with equipment F with equipment D, equipment E, specifically comprises:
(a1) set period initial value i=0;
(a2) the i sector of device A sends wave beam and forms training sequence, obtains the best of mating with equipment B and sends the sector and feed back to PCP/AP, and wherein, M is the sector sum, 0≤i≤M;
(a3) the i sector beam in device A forms under the training signal, equipment B, equipment C, equipment D, equipment E and equipment F intercept signal with the omnidirectional antenna pattern, and will intercept signal and interference threshold compares: if intercept signal greater than interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device A in the table is set to " Y "; If intercept signal smaller or equal to interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device A in the table is set to " N ";
(a4) judge whether i＜M-1 sets up: if set up, then i=i+1 returns step (a2); Otherwise finish.
(a5) repeating step (a1) is to (a4), until all devices all as a source device; The sector that forms each equipment is intercepted table and is fed back to PCP/AP.
Said process can use flowcharting shown in Figure 5, when changing, channel need carry out wave beam again when forming, each equipment all needs to upgrade local sector by above-mentioned steps and intercepts table, thereby guarantees that each equipment feeds back to the sector ID of PCP/AP and corresponding sector and intercepts table and meet communications link condition.
After all devices is finished wave beam and is formed, table is intercepted as shown in Figure 6 in the sector of storing on the equipment, the best sector ID that uses during with other devices communicatings as shown in Figure 7, the best sector ID that all devices uses when table and equipment and other devices communicatings are intercepted in the sector 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 index with the best sector ID that uses in the communication, finds out the sector and intercepts the sector of correspondence in the table to the interference value of corresponding device, and according to interference value, PCP/AP can assess out the interference result between SP rapidly, select can with current SP
eCarry out the SP of spatial reuse
cFor 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, wave beam form obtain (A, B) sector ID of Shi Yonging is respectively (1,6); (C, D) sector ID of Shi Yonging is respectively (3,1);
(b2) table is intercepted in the sector of PCP/AP reference device x feedback, the SP that is not positioned at for equipment x
eOr SP
C1Two interior equipment, two values of these two the employed transmission sector ID of equipment correspondences are " N ", then flag evenly
x=1, deny person flag
x=0; Wherein, equipment x is device A, equipment B, equipment C or equipment D; In this example, equipment C go up the sector intercept table (A, B) value of equipment (1,6) sector correspondence be (Y, N), flag
C=0; Equipment D go up the sector intercept table (A, B) value of equipment (1,6) sector correspondence be (N, Y), flag
D=0; On the device A sector intercept table (C, D) value of equipment (3,1) sector correspondence be (Y, N), flag
A=0; On the equipment B sector intercept table (C, D) value of equipment (3,1) sector correspondence be (N, Y), flag
B=0;
(b3) PCP/AP judges FLAG=flag
AFlag
BFlag
XFlag
YValue whether be 1, if, SP then
eWith this SP
cCan carry out spatial reuse, otherwise SP
eWith this SP
cCannot carry out spatial reuse; In this example, FLAG=flag
AFlag
BFlag
XFlag
Y=0, SP then is described
eCan not with SP
C1Carry out spatial reuse.
In this example, (A is B) with (PCP/AP assesses SP for C, the D) FLAG=0 of the link of Zu Chenging in PCP/AP calculating
eCan not with SP
C1In equipment carry out spatial reuse.With (E, (C D) repeats above-mentioned steps, gets FLAG=1, i.e. SP in F) replacement
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 be used flowcharting 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 only is preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle 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 (2)
1. the millimeter wave high-speed communication system beam sector method for spacial multiplex of intercepting is characterized in that: comprise that the sector intercepts table and form step, two equipment that the note request communicates are respectively source device and destination device, and this step specifically comprises:
(a1) set period initial value i=0;
(a2) the i sector of source device sends wave beam and forms training sequence, obtains the best of mating with destination device and sends the sector and feed back to PCP/AP, and wherein, M is the sector sum, 0≤i≤M;
(a3) the i sector beam at source device forms under the training signal, destination device and other equipment are intercepted signal with the omnidirectional antenna pattern, and will intercept signal and interference threshold compares: if intercept signal greater than interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device in the table is set to " Y "; If intercept signal smaller or equal to interference threshold, then the sector of this equipment value of intercepting the i sector of corresponding source device in the table is set to " N ";
(a4) judge whether i＜M-1 sets up: if set up, then i=i+1 returns step (a2); Otherwise finish;
(a5) repeating step (a1) is to (a4), until all devices all as a source device; The sector that forms each equipment is intercepted table and is fed back to PCP/AP.
2. the millimeter wave high-speed communication system beam sector according to claim 1 method for spacial multiplex of intercepting is characterized in that: comprise that also PCP/AP sends the sector according to the best and table is intercepted in the sector, judge the current time SP of distribution services
eWith candidate service time SP
cCan multiplexing step, 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 in the sector of PCP/AP reference device x feedback, the SP that is not positioned at for equipment x
eOr SP
cTwo interior equipment, two values of these two the employed transmission sector ID of equipment correspondences are " N ", then flag evenly
x=1, deny 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, SP then
eWith this SP
cCan carry out spatial reuse, otherwise SP
eWith this SP
cCannot carry out spatial reuse.
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| CN103607231A (en) * | 2013-11-27 | 2014-02-26 | 上海电机学院 | Fast wave beam switching method with multiple antennas in 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 |
| CN104168658A (en) * | 2014-08-15 | 2014-11-26 | 青岛科技大学 | Spatial multiplexing link scheduling method applied to millimeter wave WPAN |
| CN105409266A (en) * | 2013-10-28 | 2016-03-16 | 华为技术有限公司 | Joint scheduling method and apparatus |
| CN105978614A (en) * | 2016-06-28 | 2016-09-28 | 东南大学 | Direction antenna spatial multiplexing method for millimeter wave system |
| CN106027216A (en) * | 2016-06-29 | 2016-10-12 | 江苏中兴微通信息科技有限公司 | Station scheduling method for wireless station-to-station (S2S) communication system |
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| CN105978614B (en) * | 2016-06-28 | 2019-05-31 | 东南大学 | A kind of millimeter-wave systems directional aerial method for spacial multiplex |
| CN106027216A (en) * | 2016-06-29 | 2016-10-12 | 江苏中兴微通信息科技有限公司 | Station scheduling method for wireless station-to-station (S2S) communication system |
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