CN108111212A - A kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information - Google Patents
A kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
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Abstract
The present invention proposes a kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information, mainly solves the problems, such as that existing ultrahigh speed wireless personal area network beam form-endowing method control overhead is big and the used time is more.Its implementation is：By the historical information of wave beam forming, preferentially sector where the Correspondent Node in record sends wave beam training frames or is monitored；Meanwhile data frame destination node is allowed to send out the information such as frame used time according to the sequence number and node of the wave beam training frames received, calculate data frame source node at the time of sector where receive process are relayed to oneself and sends a wave beam training frames to it at the moment.The present invention can be on the premise of wave beam forming effect be ensured, data frame destination node is allowed to send out wave beam training frames less and reduce data frame source node on the whole and sends out wave beam training frames, shorten the beamforming process used time, so as to reduce control overhead and be conducive to shorten data frame transfer delay, accessed available for the orientation of 60GHz and Terahertz ultrahigh speed wireless personal area network.
Description
Technical field
The invention belongs to use 60GHz ultrahigh speeds wireless personal area network and Terahertz ultrahigh speed wireless personal area network (terahertz
Wireless personal area networks) technology field more particularly to send and receive node and used orientation
Antenna and beam form-endowing method are into the ultrahigh speed wireless personal area network occasion of row data communication.
Background technology
Ultrahigh speed wireless personal area network (its topological diagram such as Figure of description 1) is that a kind of the maximum data transmission rate can reach
The wireless personal area network of Gbps ranks, the network can make full use of the advantage of Very-High-Data-Rate, for the high load of emergence
Business provides rate and supports.As a kind of wireless self-organization network, ultrahigh speed wireless personal area network is typically the dynamic chain by node
Composition is connect, independent of existing network infrastructure；Since carrier frequency is very high, the communication range of node is usually in 100m
Within.Ultrahigh speed wireless personal area network be it is a kind of can self, the big bandwidth wireless network of self-management, as following low coverage
A kind of effective form from ultrahigh speed wireless communication has important research and application value.According to pertinent literature, ultrahigh speed without
Line personal area network mainly includes 60GHz ultrahigh speeds wireless personal area network and Terahertz ultrahigh speed wireless personal area network at present.
Since the frequency of millimeter wave and Terahertz frequency range is very high, the electromagnetic waves of the two frequency ranges is in free-space propagation
Path loss is larger.In order to tackle this problem, increase the communication distance of node, sending and receiving end directional transmissions technical system is introduced into
Into ultrahigh speed wireless personal area network.And be responsible for beam communication be provided be directed toward wireless signal wave beam beamforming technique receiving
Occupy very important status in originator directional transmissions technical system.
Sending and receiving end directional transmissions technology can be concentrated emitted energy in particular directions by wave beam forming, can be caused
Some direction transmission power increase and the transmission power on other directions close to zero, so as to reach the effect of expanding communication distance
Fruit.Compared with omni-direction transmissions, directional transmissions can reach total transmission power under the same conditions specific direction communication away from
From longer effect.Millimeter wave and too can be effectively compensated for using high-precision wave beam forming in ultrahigh speed wireless personal area network
The high path attenuation of hertz signal can also provide the possibility of space division multiplexing.Beam form-endowing method is usually wireless in ultrahigh speed
It is used in personal area network orientation access protocol, the purpose is to allow two nodes from orientation disordered state to mutual orientation state.
At present, for the beam form-endowing method of ultrahigh speed wireless personal area network, people have had carried out some research.Junyi
Wang etc. proposes the 60GHz beam form-endowing methods based on code book (referring to document：[1]Junyi Wang,Zhou lan,
Chang-Woo Pyo,TuncerBaykas,Chin-Sean Sum,M Azizur Rahman,Jing Gao,
RyuheiFunada,FumihideKojima,Hiroshi Harada,Shuzo Kato.Beam Codebook Based
Beamforming Protocol for Multi-Gbps Millimeter-Wave WPAN Systems[J].2009IEEE
Journal Selected Areas in Communications,2009,27(08):1390-1399.).This method is by node
Between wave beam forming training process be divided into three ranks：①Zhun omnidirectionals rank；2. sector level；3. wave beam rank.These three grades
Other directive gain is sequentially increased, and coverage is sequentially reduced.In order to reach identical propagation distance, what three ranks used
Coded modulation scheme is also different, and the big rank of directive gain uses higher order modulation scheme.Upper level not Que Ding after, next rank
Start further according to demand.Upper level is not premise, and next rank is subdivision.The method of different stage division avoids largely not
Necessary synchronization overhead.Assuming that the transmission of nodes, reception direction number are respectively a and b.Each rank is divided into 3 steps
Suddenly.Step 1：Node A sends training frames to a direction, repeats to send b times in each direction.And node B is followed in each direction
Ring receives training frames.The time that A is sent in one direction is equal to the time that B Xun Huans receive one week.Node B is sent to a direction
Training frames repeat to send b times in each direction.Node A is cycled in each direction and is received training frames；Step 2：Node A is every
A side sends up a training and replys frame, and node B attempts to receive a times in optimum reception direction.Node B is in optimal sending direction
Upper to send a training reply frame, node A attempts to receive 1 time in optimum reception direction；Step 3：A sends a sector to B and reflects
Penetrate frame, B receive after to sending a sector map frame, A is to B loopback ACK frames.
In the above-mentioned 60GHz beam form-endowing methods based on code book, node is using asymmetrical antenna system, and such is
System is so that wave beam forming training expense increase between node.IEEE 802.15.3c standards then provide the wave beam of symmetrical antenna system
Figuration trains flow (referring to document：[2]IEEE Standard802.15.3c-2009-Part 15.3:Wireless
Medium Access Control(MAC)and Physical Layer(PHY)Specifications for High Rate
Wireless Personal Area Networks(WPANs)Amendment 2:Millimeter-wave-based
Alternative Physical Layer Extension[S].IEEE Computer Society,2009:159-161.)。
Assuming that the transmission of nodes, reception direction number are a.Node A first sends training sequence to a direction, each
It repeats to send a times on direction.And node B rotary beams direction is with received training sequence.The time that A is sent in one direction is equal to
B Xun Huans receive the time of one week.Then, node B sends training sequence in optimal beam direction to A, and a is repeated in same direction
It is secondary, while node A rotary beams direction is to receive the training sequence from B.Last A, B interaction sector in optimal beam direction
Mapping message.In order to which cost and control overhead minimize, the node in ultrahigh speed wireless personal area network typically each equips symmetrical antenna
System.
IEEE 802.11ad standards also define beam form-endowing method, and this method is totally being divided into two ranks：1. sector
Rank；2. wave beam rank.And it is also taken in the wave beam forming details of each rank and the side of document [1] equally beam scanning
Formula is (referring to document：[3]IEEE 802.11ad-2012-Part 11:Wireless LAN Medium Access Control
(MAC)and Physical Layer(PHY)Specifications Amendment 3:Enhancements for Very
High Throughput in the 60GHz Band[S].IEEE Computer Society,2012:221-328.)。
Akhtar proposes the high-efficiency network rank wave beam forming training method (ginseng suitable for 802.11ad WLANs
See document：[4]Akhtar Anique,ErgenSinemColeri.Efficient network level beamforming
training for IEEE802.11.ad WLANs[C].2015International Symposium Performance
Evaluation of Computer and Telecommunication Systems(SPECTS 2015),2015:1-6.)。
In the method, each node mainly takes a kind of " intelligence is monitored " mechanism.When two nodes of a link carry out wave beam tax
When shape is trained, other node rotary beam directions attempt to receive wave beam training frames.Once receiving, associated beam information is preserved.If
It needs then reduce operating procedure when carrying out wave beam forming training with the node later.
Peng Bile propose that time-consuming to solve the problems, such as Terahertz frequency range wave beam forming by way of out-of-band signalling
(referring to document：[5]Peng Bile,Priebe Sebastian,Kurner Thomas.Fast beam searching
concept for indoor Terahertz communications[C].2014 8th European Conference
on Antennas and Propagation(EuRA 2014),2014:639-643.).But due to supporting this agreement
Node must carry two sets of transceivers (low-frequency range transceiver and high band transceiver) so that dispose the cost of this network compared with
It is high.
Chong Han propose a kind of Terahertz MAC (MA-MAC) method of angular multiplexed storage auxiliary (referring to document：
[6]Chong Han,Wenqian Tong,and Xinyi Wu.A Memory-Assisted MAC Protocol with
Angular-Division-Multiplexing in Terahertz Networks[C].IEEE International
Conference on Computer Communications and Networks Mobile and Wireless
Networking(IEEE ICC 2017),2017:1-6.).The core of MA-MAC is the data transmission mechanism that memory is oriented to.It should
The main thought of mechanism is：It first checks whether to do wave beam forming with Correspondent Node before node-node transmission data.If do not done,
Normal wave beam forming is then carried out with Correspondent Node and stores wave beam forming result.If done, using historical information in correspondence
Side sends up data.Sending the condition that data terminate is：1. data transmission is completed；2. data transmission fails.If data pass
Defeated failure, then transmitting-receiving node re-start wave beam forming.MA-MAC is instructed by the storage of this node and the wave beam forming of other nodes
Practice result to avoid repeating beam scanning, this thinking has larger reference, this article for reducing wave beam forming expense
Node is referred to by storing with the wave beam forming training results of other nodes to avoid repeating beam scanning, this thinking for
Reducing wave beam forming expense has certain reference.
It is not difficult to find out from the studies above present situation, people orient wave beam forming side in access protocol to ultrahigh speed wireless personal area network
A period of time has been carried out in the research of method, wave beam training frames receive and shorten wave beam forming take etc. obtain some into
Exhibition.But it is found by furtheing investigate, the beam form-endowing method of existing ultrahigh speed wireless personal area network, which still has some, influences wave beam
It is the problem of figuration performance, specific as follows：
1. according to existing ultrahigh speed wireless personal area network associated beam shaping method, each node of data frame is sent (i.e.
The source node of data frame) sector scannings of gamut (360 degree) will be done, send wave beam training frames in each sector；And it is saving
Point before done wave beam forming and relative direction it is unchanged in the case of, scanning each sector be not necessarily to, thus show
Some gamut sector scanning operations bring the control overhead and time loss of redundancy.
2. in the wave beam training process of existing ultrahigh speed wireless personal area network associated beam shaping method, data frame is received
Node (i.e. data frame destination node), be in subsequent a period of time after the wave beam training frames that data frame source node is sent are received
Sector where inbound data frame source node sends multiple wave beam training frames, so that data frame source node is allowed to be properly received therein one
It is a；And in the case where can accurately calculate data frame source node and be received in which sector, data frame destination node only needs
A wave beam training frames are sent to data frame source node at the time of corresponding, which just can be properly received by data frame source node；This
Sample, just there are the control overheads and time loss of redundancy for the existing operation for sending multiple wave beam training frames.
The above problem causes existing ultrahigh speed wireless personal area network beam form-endowing method in control overhead and exists in terms of the used time
Redundancy, so as to affect the performance of ultrahigh speed wireless personal area network wave beam forming.In order to reduce control overhead and beamforming process
Used time, it is necessary to propose that new cut-in method solves them.It is practicable that the present invention will be directed to the proposition of these problems
Solution.
The content of the invention
The present invention proposes a kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information, it is included
" node hair frame is reduced based on historical information " and " calculated based on the time and reduce destination node hair frame " two kinds of new mechanisms, by using
The historical information and temporal information of wave beam forming are adaptively to reduce data frame source, destination node is sent out in beamforming process
The wave beam training frames sent, can be with less control overhead compared to existing ultrahigh speed wireless personal area network beam form-endowing method
Reach identical wave beam forming effect, and the time used in beamforming process can be reduced on the whole.
Ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information ultrahigh speed without
It is used in the orientation access protocol of line personal area network.Ultrahigh speed wireless personal area network orients access protocol by network node from logic function
On be divided into PNC (PicoNet Controller, piconet controller) and DEV (DEVice, ordinary node equipment) two classes, two classes
The physical make-up of node can it is identical can also difference, node two-by-two between can direct communication；When node is in communication with each other, nothing
By transceiving data frame or control frame, using directive sending and the communication mode of directional reception.Ultrahigh speed wireless personal area network is determined
The network operation time is usually divided into continuous multiple superframes to access protocol；Each super-frame durations for a period of time, by Beacon,
Three period groups of CAP (Contention Access Period) and CTAP (Channel Time Allocation Period)
Into；Wherein, the CAP periods are made of Association S-CAP, Regular S-CAP and tri- sub-periods of Regular CAP；
The CTAP periods are made of multiple CTA sub-periods, and each pair node transfers data frame in CTA sub-periods；Each CTA again by
Beamforming CTA and Data Connection CTA (hereinafter referred " DC-CTA ") two parts form；It is proposed by the present invention
Efficient beam form-endowing method based on historical information is run in Beamforming CTA.
(1) basic ideas and primary operational of new mechanism proposed by the present invention
" node hair frame is reduced based on historical information " proposed by the present invention is introduced in detail below and " is calculated and reduced based on the time
The basic ideas and primary operational of two kinds of new mechanisms of destination node hair frame ".
1. node hair frame is reduced based on historical information
" reducing node hair frame based on historical information " basic ideas of new mechanism are：Do wave beam forming if necessary two
Node was doing wave beam forming before, then by the historical information of the wave beam forming recorded before to current beamforming process
It optimizes, reduces data frame source, the wave beam training frames that destination node is sent；Concrete thought includes data frame source node from record
Correspondent Node where sector start sector where sending wave beam training frames, data frame destination node from the Correspondent Node of record and open
Begin that sector where reception wave beam training frames, Correspondent Node of the data frame destination node in record is waited to stand after receiving wave beam training frames
Reply wave beam training frames etc..Ripple can be reduced on the whole on the premise of wave beam forming effect is not influenced by so doing
The transmission of beam training frames, and shorten the time used in beamforming process.
" reducing node hair frame based on historical information " new mechanism operates in CTA sub-periods in the CTAP periods
Beamforming CTA parts, its primary operational are as follows：
(1) node judges：Whether oneself is source node in current CTAIf so, turn (3)；If it is not, it holds
Row is in next step.
(2) present node judges：Whether oneself is purpose node in current CTAIf so, turn (5)；If it is not,
The operation of this new mechanism terminates.
(3) present node (for data frame source node) query node fan antenna information table judges oneself and data frame purpose
Whether node carried out wave beam forming and (if doing beamforming operation before, data is had in the aerial information table of node sectors
The correspondence list item of frame destination node, not doing wave beam forming does not have then)；If so, perform next step；If it is not, this new machine
System operation terminates.
(4) the data frame destination node that present node records (for data frame source node) from the aerial information table of node sectors
Place sector proceeds by sector scanning, and (sector scanning refers to sends the operation of wave beam training frames in each sector；Typically according to suitable
Sequence is sent, and the wave beam training frame number sent in each sector is equal to sector sum)；Sending first wave beam training frames
Afterwards, pause is sent, and is monitored a period of time in the sector, and when monitoring is a length of predetermined for receiving a wave beam training frames institute
Use the time.If receiving the wave beam training frames that data frame destination node is sent, antenna letter is extracted from the wave beam training frames
Breath, is deposited into the corresponding list item of data frame destination node in the aerial information table of node sectors, in the list item " where Correspondent Node
The value of sector number " and " sector number where oneself " two fields remains unchanged.(" node sectors aerial information table " is a kind of record
The aerial information of node and the table of place sector are pre-established and safeguarded by each node in network；The content master included in table
Have：The aerial information of Correspondent Node, sector number --- Correspondent Node is located at which sector of oneself at Correspondent Node place, oneself
Place sector number --- oneself is in which sector of Correspondent Node；The aerial information of Correspondent Node is received from beamforming process
Wave beam training frames in obtain, sector number where Correspondent Node is equal to reception antenna when receiving other side's wave beam training frames and is directed at fan
The sequence number in area, sector number where oneself are then to be calculated and obtained with the sequence number of the wave beam training frames received；If it is not saved with other side
Point carried out wave beam forming, then Correspondent Node does not have corresponding list item in " node sectors aerial information table "；To it is existing related
The node sectors aerial information table that beam form-endowing method is established is compared, the node sectors aerial information that institute's extracting method of the present invention is established
Table adds " sector number where oneself " field for each list item)；So far, this new mechanism operation terminates.If data frame source is saved
Point confiscates the wave beam training frames that data frame destination node is sent in listening period, then this new mechanism operation terminates.
(5) present node (for data frame destination node) query node fan antenna information table, judges oneself and data frame
Whether source node carried out wave beam forming；If so, perform next step；If it is not, the operation of this new mechanism terminates.
(6) the data frame source node that present node records (for data frame destination node) from the aerial information table of node sectors
Place sector begins listening for a period of time, and when monitoring is a length of predetermined for receiving the time used in a wave beam training frames.
If receiving the wave beam training frames that data frame source node is sent in listening period, next step is performed；If do not received,
The operation of this new mechanism terminates.
(7) present node (for data frame destination node) extracts day from the wave beam training frames that data frame source node is sent
Line information, is deposited into the corresponding list item of data frame source node in the aerial information table of node sectors, " Correspondent Node institute in the list item
In sector number " and the value of " oneself where sector number " two fields remain unchanged；Then, a wave beam training frames are generated, by frame
Sequence number and the aerial information of oneself be packed into the frame, and the frame is sent to data frame source section in the sector for receiving wave beam training frames
Point；So far, this new mechanism operation terminates.
Destination node hair frame is reduced 2. being calculated based on the time
" calculated based on the time and reduce destination node hair frame " basic ideas of new mechanism are：Data frame destination node is according to receipts
To the wave beam training frames that send of source node sequence number, node sends the time of a wave beam training frames, node monitors a ripple
The information such as the time of beam training frames, calculate data frame source node rotation snoop procedure be relayed to oneself where sector it is accurate
Moment, as soon as a wave beam training frames then are sent to data frame source node at the moment, in this way, can wave beam forming effect ensured
On the premise of, data frame destination node is made only to send a wave beam training frames, so as to reduce data frame destination node hair frame
Quantity reduces control overhead, and shortens the time used in beamforming process.
" calculated based on the time and reduce destination node hair frame " new mechanism operates in CTA sub-periods in the CTAP periods
Beamforming CTA parts, its primary operational are as follows：
(1) after a CTA starts, a node judges：Whether oneself is the purpose that data frame is received in the CTA
NodeIf so, perform next step；If it is not, then the operation of this new mechanism terminates.
(2) present node (for data frame destination node) judges：Whether the wave beam instruction of data frame source node transmission is had received
Practice frameIf so, perform next step；If it is not, then judge：Whether current CTA has terminatedIf it is, this new mechanism
Operation terminates；If it is not, then Xun Huan performs this step (i.e. (2) step).
(3) present node (for data frame destination node) extracts day from the wave beam training frames that data frame source node is sent
Line information and sequence number calculate sector number where oneself with sequence number according to the following formula --- and oneself is residing in the sector of Correspondent Node
The sequence number of sector：
In formula, k represents sector number where present node；α is the parameter that a value is 0 or 1, if node sectors antenna is believed
It ceases the corresponding list item of Correspondent Node in table and there is then α=1, otherwise α=0；M represents the sequence for the wave beam training frames that present node receives
Number, n represents that sector is total, and data frame source node corresponds in list item " sector where oneself in h expression node sectors aerial information tables
Number " value of field, the h=-1 if corresponding list item is not present；Represent downward rounding operation.Then, present node is by other side
Sector number where node antennas information, sector number, Correspondent Node where oneself (is equal to reception antenna when receiving the wave beam training frames
The sequence number of place sector) node sectors aerial information table is stored in together.
(4) present node (for data frame destination node) sends a wave beam training frames institute using pre-set for node
With the time (t is used in calculating formula belowsRepresent, the time include interframe space), for node monitor a wave beam training frames institute
With the time (t is used in calculating formula belowrRepresent, which includes interframe space), data frame source node is calculated in each sector
T at the time of sector where sequentially snoop procedure is relayed to oneselfa, specifically calculated with following formula：
In formula, tp, m is represented respectively at the time of present node receives the wave beam training frames that data frame source node is sent and the ripple
The sequence number of beam training frames, n represent sector sum,Represent downward rounding operation.
(5) present node (for data frame destination node) is in taMoment sends a band to sector where data frame source node
There are the wave beam training frames of sequence number and oneself aerial information.So far, this new mechanism operation terminates.
(2) the ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information is main
Operation
Ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information ultrahigh speed without
It is used in the orientation access protocol of line personal area network.Ultrahigh speed wireless personal area network orientation access protocol is usually by the network operation time point
For continuous multiple superframes, each superframe is made of tri- periods of Beacon, CAP and CTAP；The CTAP periods therein are by multiple
CTA sub-periods form, and each CTA sub-periods are by Beamforming CTA and Data Connection CTA two parts groups
Into；Efficient beam form-endowing method proposed by the present invention based on historical information is run in Beamforming CTA；When network is transported
After the row time enters the Beamforming CTA parts of superframe CTA sub-periods, each node just runs new side proposed by the present invention
Method.
The primary operational of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information
Step is specific as follows：
S1：One node judges：Whether oneself is source node in current CTAIf so, turn S3；If it is not, it performs
In next step.
S2：Present node judges：Whether oneself is purpose node in current CTAIf so, turn S7；If it is not, this
Method operation terminates.
S3：Present node (for data frame source node) query node fan antenna information table judges oneself and data frame purpose
Whether node carried out wave beam forming and (if doing beamforming operation before, data is had in the aerial information table of node sectors
The correspondence list item of frame destination node, not doing wave beam forming does not have then)；If so, turn S5；If it is not, perform next step.
S4：Present node (for data frame source node) sequentially rotates progress sector since first sector of acquiescence and sweeps
It retouches, is equal to the wave beam training frames of sector sum in each sector quantity forwarded, often send a wave beam training frames and just instruct wave beam
The sequence number for practicing frame adds 1 (default initial values of wave beam training frame number are " 0 "), until scanning through all sectors；Then, from acquiescence
First sector start, sequentially monitored in each sector；If receive the wave beam training that data frame destination node is sent
Frame then therefrom extracts aerial information and sequence number, oneself place sector number is calculated with sequence number according to formula (1)；Next, it is saving
A list item is established in point fan antenna information table for data frame destination node (to orient to existing related ultrahigh speed wireless personal area network
The beam form-endowing method of access protocol is compared, in the table entry the fields for establishing one " sector number where oneself " more), and by day
Line information, sector number is stored in data frame mesh in the aerial information table of node sectors together with sector number where Correspondent Node where oneself
The corresponding list item of node；So far, this method operation terminates.If it all carries out monitoring but not receiving data in all sectors
The wave beam training frames that frame destination node is sent, then judge whether current CTA also has remaining time；If so, sheet is then performed again
Step (S4)；If it is not, this method operation terminates.
S5：The data frame destination node that present node records (for data frame source node) from the aerial information table of node sectors
Place sector proceeds by sector scanning；After first wave beam training frames is sent, pause is sent, when monitoring one section in the sector
Between, when monitoring, is a length of predetermined for receiving the time used in a wave beam training frames.If receive data frame destination node
The wave beam training frames sent then extract aerial information from the wave beam training frames and are deposited into node sectors aerial information table
In the corresponding list item of data frame destination node；So far, this method operation terminates.If data frame mesh is confiscated in listening period
The wave beam training frames sent of node, then perform next step.
S6：Present node (for data frame source node) continues sequentially rotation sweep in the sector of first time scanning, until
Scan through all sectors；Then, since first sector of acquiescence, sequentially monitored in each sector；If receive number
The wave beam training frames sent according to frame destination node, then therefrom extract aerial information and sequence number, is calculated with sequence number according to formula (1)
Aerial information, sector number where oneself are stored in node sectors by sector number where oneself together with sector number where Correspondent Node
Aerial information table, so far, this method operation terminate.If it all carries out monitoring but not receiving data frame purpose in all sectors
The wave beam training frames that node is sent, then judge whether current CTA also has remaining time；If so, then turn S4；If it is not,
This method operation terminates.
S7：Present node (for data frame destination node) query node fan antenna information table, judges oneself and data frame
Whether source node carried out wave beam forming and (if doing beamforming operation before, number is had in the aerial information table of node sectors
According to the correspondence list item of frame source node, not doing wave beam forming does not have then)；If so, perform next step；If it is not, turn S10.
S8：The data frame source node that present node records (for data frame destination node) from the aerial information table of node sectors
Place sector is begun listening for, and when monitoring is a length of predetermined for receiving the time of a wave beam training frames.If it is monitoring
The wave beam training frames that data frame source node is sent are received in time, then perform next step；If do not received, turn S10.
S9：Present node (for data frame destination node) extracts day from the wave beam training frames that data frame source node is sent
Line information is simultaneously deposited into the corresponding list item of data frame source node in the aerial information table of node sectors；Then, a wave beam is generated
The sequence number of the frame and the aerial information of oneself are packed into the frame, and send out the frame in the sector for receiving wave beam training frames by training frames
Give data frame source node；So far, this method operation terminates.
S10：Under present node (for the data frame destination node) current sector that reception antenna is aligned from sector sequence
One sector start (if current sector number be maximum, next sector for acquiescence the 1st sector；If current sector number
Not can determine that, then since the 1st sector of acquiescence), it sequentially circulates in each sector and monitors a period of time；If receive data
The wave beam training frames that frame source node is sent then therefrom extract aerial information and sequence number, and are come from sequence number according to formula (1) calculating
Sector number where oneself, by aerial information, sector number is stored in node sectors day together with sector number where Correspondent Node where oneself
The corresponding list item of data frame source node in line information table, if the corresponding table of data frame source node in the aerial information table of node sectors
There is no then first establish and then be stored in for item；Then, a wave beam training frames are generated, by the sequence number of the frame and the aerial information of oneself
The frame is packed into, and data frame source node is calculated at the time of sector where Rotation of receiver process is relayed to oneself according to formula (2)；
Then, until the moment arrives, the frame is sent to data frame source node by sector where data frame source node；So far, it is our
Method operation terminates.If not receiving the wave beam training frames that data frame source node is sent, judge：Whether current CTA has terminated
If it is, this method operation terminates；If it is not, then Xun Huan performs this step (i.e. S10).
New mechanism 1 proposed by the present invention --- " reducing node hair frame based on historical information " is mainly operated in above-mentioned steps
S3, S5, S7, S8, S9, new mechanism 2 --- and " based on the time calculate reduce destination node hair frame " mainly operate in step S10.
(3) beneficial effects of the present invention
Ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information can ensure
On the premise of wave beam forming effect, control overhead and the operation of beamforming process are reduced, shortens beamforming process institute's used time
Between, so as to reduce the control overhead of ultrahigh speed wireless personal area network orientation access protocol on the whole, and be conducive to shorten data
The transmission delay of frame.
The present invention reduces the control overhead of beamforming process and operation, the advantageous effect for shortening the beamforming process used time
Essentially from following two aspects：
(1) after using " reducing node hair frame based on historical information " new mechanism, wave beam forming has been done and relative direction is unchanged
Two nodes only need it is each send a wave beam training frames to other side and just can realize wave beam forming function, it is super than existing
The beam form-endowing method of Technology in High-speed WPAN orientation access protocol can send n less2(n is sector to-n-2 wave beam training frames
Sum), so as to reduce the control overhead of beamforming process and operation on the whole, shorten the beamforming process used time.
(2) after using " calculated based on the time and reduce destination node hair frame " new mechanism, each data frame destination node only needs
Sending a wave beam training frames to data frame source node just can realize the wave beam forming function of data frame source node, than existing
The beam form-endowing method of related ultrahigh speed wireless personal area network orientation access protocol can send n-1 wave beam training frames less, and (n is fan
Area's sum), so as to reduce the control overhead of beamforming process and operation, shorten the beamforming process used time.
Description of the drawings
Attached drawing 1 is ultrahigh speed wireless personal area network node type and network topology schematic diagram.
Ultrahigh speed wireless personal area network is made of the two kinds of nodes of PNC and DEV, their physical make-up is usually identical；
Network topology is full-mesh, and bidirectional data transfers can be carried out between any two node in network；The maximum data transmission speed
Rate can reach Gbps ranks.
The typical superframe structure that attached drawing 2 uses for the related orientation access protocol of existing ultrahigh speed wireless personal area network.
The related orientation access protocol of existing ultrahigh speed wireless personal area network includes Beacon, CAP and CTAP using superframe structure
Three periods, CTAP periods therein are made of multiple CTA sub-periods, and each CTA sub-periods are by Beamforming CTA
It is formed with Data Connection CTA two parts.
Attached drawing 3 carries the primary fields that the node sectors aerial information table list item that new method uses includes for the present invention.
Compared with the node sectors aerial information table that existing associated beam shaping method is established, institute's extracting method of the present invention is established
Node sectors aerial information table " sector number where oneself " field is added for each list item.
Attached drawing 4 is " reduce node based on historical information and send out frame " new mechanism operational flowchart.
" reducing node hair frame based on historical information " new mechanism operates in CTA sub-periods in the CTAP periods
Beamforming CTA parts.
Attached drawing 5 is " calculated based on the time and reduce destination node hair frame " new mechanism operational flowchart.
" calculated based on the time and reduce destination node hair frame " new mechanism operates in CTA sub-periods in the CTAP periods
Beamforming CTA parts.
Attached drawing 6 is " the ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information " proposed by the present invention
Composition schematic diagram.The new method is contained " reducing node hair frame based on historical information " and " is calculated based on the time and reduce purpose section
Two kinds of new mechanisms of point hair frame ".
Specific embodiment
One of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method proposed by the present invention based on historical information is specific
Embodiment is as follows：
One ultrahigh speed wireless personal area network includes the node of 2 or more, one of them is PNC, remaining is DEV, arbitrarily
It can directly be carried out wireless communication between two nodes, wireless communication is by the way of sending and receiving and orienting, any two
There is the bi-directional data traffic transmission demand of not timing between node.Ultrahigh speed proposed by the present invention based on historical information is wireless
The efficient beam form-endowing method of personal area network uses in the orientation access protocol of ultrahigh speed wireless personal area network.Ultrahigh speed wireless personal area network
The network operation time is usually divided into continuous multiple superframes by orientation access protocol, and each superframe is by Beacon, CAP and CTAP tri-
A period composition；The CTAP periods therein are made of multiple CTA sub-periods, and each CTA by Beamforming CTA with
Data Connection CTA two parts form；Efficient beam form-endowing method proposed by the present invention based on historical information exists
It is run in Beamforming CTA；After the network operation time Beamforming CTA parts of superframe CTA sub-periods are entered,
Each node just runs new method proposed by the present invention, performs following steps:
ES1：One node judges：Whether oneself is source node in current CTAIf so, turn ES3；If it is not, it holds
Row is in next step.
ES2：Present node judges：Whether oneself is purpose node in current CTAIf so, turn ES7；If it is not,
This method operation terminates.
ES3：Present node (for data frame source node) query node fan antenna information table, determines whether data frame mesh
The correspondence list item of node (if doing beamforming operation before, data frame purpose is had in the aerial information table of node sectors
The correspondence list item of node, not doing wave beam forming does not have then)；If so, turn ES5；If not provided, perform next step.
ES4：Present node (for data frame source node) sequentially rotates progress since first sector of acquiescence of serial number 0
Sector scanning sends the wave beam training frames that number is equal to sector sum in each sector, often sends a wave beam training frames and just will
The sequence number of wave beam training frames adds 1, until scanning through all sectors；Then, since first sector of acquiescence, sequentially each
Sector is monitored, and is monitored duration and is preset as 10ms；If the wave beam training frames that data frame destination node is sent are received, therefrom
Aerial information and sequence number are extracted, and oneself place sector number is calculated with sequence number according to formula (1)；Next, in node sectors
A list item is established (to existing related ultrahigh speed wireless personal area network orientation access association for data frame destination node in aerial information table
The beam form-endowing method of view is compared, in the table entry the fields for establishing one " sector number where oneself " more), and antenna is believed
Breath, sector number where oneself (are equal to the fan that reception antenna is aligned when receiving the wave beam training frames with sector number where Correspondent Node
Area code) the corresponding list item of data frame destination node in the aerial information table of node sectors is stored in together；So far, this method operation knot
Beam.If all having carried out monitoring but not receiving the wave beam training frames that data frame destination node is sent in all sectors, judge
Whether current CTA also has remaining time；If so, this step (ES4) is then performed again；If it is not, this method operation knot
Beam.
ES5：The data frame purpose section that present node records (for data frame source node) from the aerial information table of node sectors
Sector where point proceeds by sector scanning；After first wave beam training frames is sent, pause is sent, and is supervised in the sector
It listens, monitors duration and be preset as 10ms.If receiving the wave beam training frames that data frame destination node is sent, from the wave beam training frames
In extract aerial information and be deposited into the corresponding list item of data frame destination node in the aerial information table of node sectors；So far,
This method operation terminates.If confiscating the wave beam training frames that data frame destination node is sent in listening period, under performing
One step.
ES6：Present node (for data frame source node) continues sequentially to scan in the sector of first time scanning, until scanning
Complete all sectors；Then, since first sector of acquiescence (i.e. No. 0 sector), sequentially monitored, monitored in each sector
Duration is preset as 10ms；If receiving the wave beam training frames that data frame destination node is sent, therefrom extract aerial information and
Sequence number calculates oneself place sector number, by aerial information, sector number and Correspondent Node where oneself with sequence number according to formula (1)
Place sector number (sector number for being equal to reception antenna alignment when receiving the wave beam training frames) is stored in node sectors antenna letter together
Table is ceased, so far, this method operation terminates.If it all carries out monitoring but not receiving data frame destination node hair in all sectors
The wave beam training frames come, then judge whether current CTA also has remaining time；If so, then turn ES4；If it is not, this method
Operation terminates.
ES7：Present node (for data frame destination node) query node fan antenna information table, determines whether data frame source
The correspondence list item (having if wave beam forming is done before, otherwise do not have) of node；If so, perform next step；If not provided,
Turn ES10.
ES8：The data frame source section that present node records (for data frame destination node) from the aerial information table of node sectors
Sector where point proceeds by monitoring, monitors duration and is preset as 10ms.If data frame source node hair is received in listening period
The wave beam training frames come, then perform next step；If do not received, turn ES10.
ES9：Present node extracts (for data frame destination node) from the wave beam training frames that data frame source node is sent
Aerial information is simultaneously deposited into the corresponding list item of data frame source node in the aerial information table of node sectors；Then, a ripple is generated
The sequence number of the frame and the aerial information of oneself are packed into the frame by beam training frames, and are receiving the sectors of wave beam training frames by the frame
It is sent to data frame source node；So far, this method operation terminates.
ES10：Under present node (for the data frame destination node) current sector that reception antenna is aligned from sector sequence
One sector start (if current sector number be maximum, next sector be No. 0 sector；If current sector number not can determine that,
Then since No. 0 sector), it sequentially circulates in each sector stop 10ms and is monitored.If it receives data frame source node to send
Wave beam training frames, then therefrom extract aerial information and sequence number, sector number where oneself calculated with sequence number according to formula (1),
Aerial information, sector number where oneself are stored in data in the aerial information table of node sectors together with sector number where Correspondent Node
The corresponding list item of frame source node；Then, a wave beam training frames are generated, the sequence number of the frame and the aerial information of oneself are packed into should
Frame, and data frame source node is calculated at the time of sector where Rotation of receiver process is relayed to oneself according to formula (2), it calculated
Send and wait the time used in a wave beam training frames to be received to be preset as 10ms in journey；Then, until the moment arrives,
The frame is sent to data frame source node by sector where data frame source node；So far, this method operation terminates.If do not receive number
The wave beam training frames sent according to frame source node, then judge：Whether current CTA has terminatedIf it is, this method operation terminates；
If it is not, then Xun Huan performs this step (i.e. ES10).
Claims (3)
1. a kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information, it is characterized in that：Including following step
Suddenly：
(1) each node establishes a field for being used for sector number where representing oneself in the aerial information table of node sectors, uses
Which sector for laying oneself open to Correspondent Node recorded.
(2) in the sub-period for distributing to oneself transmission data frame, data frame source node is sentenced before wave beam forming is proceeded by
It is disconnected whether to have carried out wave beam forming with data frame destination node：
If carrying out, the sector scanning since sector where the Correspondent Node of node sectors aerial information token record, i.e., at this
Sector sends first wave beam training frames.
If not carrying out, the sector scanning since first sector of acquiescence is sent since first sector of acquiescence
Wave beam training frames.
(3) if data frame source node sector where the Correspondent Node of node sectors aerial information token record sends first ripple
Beam training frames are then monitored the one predetermined time for one wave beam training frames of reception after frame is sent, are then judged
Whether wave beam training frames that data frame destination node send are received：
If receiving, extract aerial information from the wave beam training frames and be deposited into node sectors aerial information table mileage evidence
The corresponding list item of frame destination node.
If not receiving, continue sector scanning, since current sector, sequentially send wave beam training frames in each sector,
Until scanning through all sectors.
(4) if data frame source node scans through all sectors, since first sector of acquiescence, sequentially in each sector
The one predetermined time for one wave beam training frames of reception is monitored, judges whether to receive number after each monitor
The wave beam training frames sent according to frame destination node：
If receiving, the sequence number of aerial information and frame is extracted from wave beam training frames, according to where the sequence number calculates oneself
Sector number, using the sequence number of the sector of current reception antenna alignment as sector number where Correspondent Node, then by aerial information, oneself
Sector number is stored in data frame destination node pair in the aerial information table of node sectors together with sector number where Correspondent Node where oneself
The list item answered；Then sector scanning is stopped.
If not receiving, the one predetermined time for one wave beam training frames of reception is monitored in next sector, until
It is all waited in all sectors.
(5) if data frame source node does not still receive the transmission of data frame destination node after all being monitored in all sectors
Wave beam training frames, then judge distribute to oneself send data frame sub-period whether terminate：
If terminated, stop operation.
If do not terminated, restart sector scanning and snoop procedure.
(6) distributing in the sub-period for oneself receiving data frame, data frame destination node is before wave beam forming is proceeded by
Judge whether carried out wave beam forming with data frame source node：
If carrying out, when sector monitors one section where the data frame source node first recorded in the aerial information table of node sectors
Between, when monitoring, is a length of predetermined for receiving the time of a wave beam training frames.
It if not carrying out, since first sector of acquiescence, sequentially circulates in each sector and monitors a period of time, during monitoring
A length of predetermined time for one wave beam training frames of reception.
(7) if data frame destination node carried out wave beam forming with data frame source node and completed first time snoop procedure,
Then judge whether to receive the wave beam training frames that data frame source node is sent：
If received, aerial information is extracted from the frame and is deposited into data frame source in the aerial information table of node sectors and is saved
The corresponding list item of point；Then, a wave beam training frames are generated, the sequence number of the frame and the aerial information of oneself are packed into the frame, and
The frame is sent to data frame source node in the sector for receiving wave beam training frames.
If do not received, since sector sequence the next sector for the current sector that reception antenna is aligned, sequentially in each fan
Area is monitored a period of time, and when monitoring is a length of predetermined for receiving the time of a wave beam training frames.
(8) data frame destination node sequentially circulates in each sector and monitors a period of time, judges whether to receive after monitoring every time
The wave beam training frames sent to data frame source node：
If received, the sequence number of aerial information and frame is extracted from wave beam training frames, based on the sequence number use and step (4)
Identical method calculates sector number where oneself, using the sequence number of the sector of current reception antenna alignment as where Correspondent Node
Then aerial information, sector number where oneself are stored in node sectors antenna by sector number together with sector number where Correspondent Node
The corresponding list item of data frame destination node in information table；Then, generate a wave beam training frames, by the sequence number of the frame and oneself
Aerial information is packed into the frame, and calculates data frame source node at the time of sector where Rotation of receiver process is relayed to oneself；
Then, until the moment arrives, the frame is sent to data frame source node by sector where data frame source node.
If do not received, since next sector of current sector, continue sequentially to monitor a period of time in each sector, monitor
Shi Changwei is predetermined for receiving the time of a wave beam training frames, until receiving the wave beam instruction that data frame source node is sent
Practice frame or current data transmission sub-period terminates.
2. a kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information according to claim 1,
It is characterized in that：Sector number where oneself is calculated in step (4), uses following formula：
In formula, k represents sector number where present node；α is the parameter that a value is 0 or 1, if node sectors aerial information table
In the corresponding list item of Correspondent Node there is then α=1, otherwise α=0；M represents the sequence number for the wave beam training frames that present node receives, n
Represent sector sum, h represents that data frame source node is corresponded in list item in the aerial information table of node sectors " sector number where oneself "
The value of field, the h=-1 if corresponding list item is not present；Represent downward rounding operation.
3. a kind of ultrahigh speed wireless personal area web, high efficiency beam form-endowing method based on historical information according to claim 1,
It is characterized in that：Data frame source node is calculated in step (8) at the time of sector where Rotation of receiver process is relayed to oneself, is made
Use following formula：
In formula, taData frame source node is represented at the time of sector where Rotation of receiver process is relayed to present node, tp, m difference
Represent that the sequence number with the wave beam training frames, n are represented at the time of present node receives the wave beam training frames that data frame source node is sent
Sector sum,Represent downward rounding operation.
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