CN110099387A - The Multi-AP information transmission system and transmission method under a kind of 6GHz scene - Google Patents
The Multi-AP information transmission system and transmission method under a kind of 6GHz scene Download PDFInfo
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- CN110099387A CN110099387A CN201910368091.7A CN201910368091A CN110099387A CN 110099387 A CN110099387 A CN 110099387A CN 201910368091 A CN201910368091 A CN 201910368091A CN 110099387 A CN110099387 A CN 110099387A
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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
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0294—Traffic management, e.g. flow control or congestion control forcing collision
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1215—Wireless traffic scheduling for collaboration of different radio technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
- H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
- H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
Abstract
The invention belongs to network information processing technical field, the Multi-AP information transmission system and transmission method, multiple AP disclosed under a kind of 6GHz scene carries out identical networkings, obtains the mutual error message of each AP by wired interconnection；OBSS pairing is carried out under 6GHz scene, inhibits the co-channel interference in Overlapping Basic Service Set network；In a communications system, shared resource is carried out by cooperating with each other between network node；Identical networking, wired interconnection Multi-AP in conjunction with full duplex Relay, using Relay carry out uplink agency transmission service, multiple STA up-link wireless frames of each AP are disposably transmitted to corresponding AP by the way of cross-carrier by the way of convergence.The present invention further promotes the performance of the area OBSS STA and improves systematic entirety energy, supports multiple frequency ranges, while supporting cross-carrier full duplex.
Description
Technical field
The invention belongs to the Multi-AP information biographies under network information processing technical field more particularly to a kind of 6GHz scene
Defeated system and transmission method.
Background technique
Currently, the immediate prior art:
With the development of multimedia service demand, mobility is strong, networking flexibility and scalability are strong WLAN
(Wireless LAN) gains great popularity, meanwhile, the frequency spectrum of next-generation WiFi is extended to 6GHz.But with WLAN deployment
More and more intensive, the collision of BSS is increasingly severe, and OBSS problem is increasingly severe, how Overlapping Basic Service Set WLAN
Realize that effective transmission of data becomes particularly important in scene.
Wireless channel has broadcast characteristic, so that node is helped each other, if reasonably selecting relaying participates in transmission, can improve logical
The reliability for believing link, so that system performance is significantly promoted.
The prior art: 3G LTE ascending wireless resource manages the research of key technology, Beijing University of Post & Telecommunication, Qian Yu.
Article under the situation of virtual MIMO, determine how using user match gained virtual MIMO channel matrix characteristic,
Increase throughput of system, lifting system performance.In virtual MIMO wireless resource management, user, which matches scheduling, 2 kinds of modes: 1)
A user is first dispatched according to certain dispatching algorithm unrelated with virtual MIMO channel, then selection is matched channel with the user and held
It measures maximum user and forms virtual MIMO, this scheme is relatively simple, but is not easy to provide QoS guarantee.In this regard, proposed in this paper
User to be paired is just divided into two groups according to signal-to-noise ratio (Signal To Noise Ratio, SNR) by algorithm, and each group has oneself
Corresponding pairing criterion, user's pairing preferentially carry out in the user group similar in SNR, meanwhile, it provides across assembling to marginal utility
Function, to maximally utilize multi-user diversity.
Single-antenna subscriber match while greatly improving system performance to multi-antenna base station transmission, in Multi-AP
Under scene, if can be matched to insignificant user is interfered with each other, while being communicated, will be avoided significantly to its associated AP
OBSS collision.
Wherein, fixed relay agreement includes:
Fixed relay agreement is a kind of simplest cooperation diversity protocol, and the relay node of cooperation is participated in network to fix
User.
Selectivity decodes forward relay
If the signal-to-noise ratio of relay be greater than setting threshold value, relay correct decoding a possibility that it is bigger, then relay
Purpose user will be transmitted to after the signal received decoding.Conversely, being received if the channel fading between source and relaying is serious
Signal-to-noise ratio is lower than threshold value, then relaying is not involved in forwarding.
Increment relays
Assuming that between relaying and destination node, there are a feedback channels, using the feedback information of destination node, if mesh
Node can be properly received decoding the information from source, then to relaying send confirmation signal, relaying no longer forward.It is only purposeful
Relaying is just retransmitted when node fails to be properly received the information from source node.
In conclusion problem of the existing technology is:
(1) next generation WiFi is by spread spectrum to 6GHz, thus all AP for operating in 6GHz will all support in 6GHz and
2.4/5.8GHz working under multiband.And existing Multi-AP technology is all based on 2.4/5.8GHz scene, it is existing in OBSS
Many methods be all that will interfere elimination or be reduced to acceptable level, to realize simultaneous transmission, and 6GHz simultaneously
It is informal to support, because 6GHz newly puts forward, 6GHz frequency spectrum is not yet used before.
Present Relay technology is mostly the realization in physical layer, comparatively lacks the support of some communication mechanisms, and
And also it is not applied to 6GHz.
(2) multiple STA often receive AP transmission downlink data after, it is necessary to individually give AP reply BA, in communication quality
It is difficult to ensure that BA can be properly received by AP in lower situation, and AP needs are individually received and are parsed to each BA,
In the case that requirement of real-time is not high, inefficiency.
Solve the difficulty of above-mentioned technical problem:
There is interference in OBSS, seriously affect communication quality, and this programme needs match the lesser user that interacts；
The convergence of cross-carrier re-transmission and BA frame.
Solve the meaning of above-mentioned technical problem:
Multiple AP carry out identical networking, the mutual error situation of each AP are understood by wired interconnection, in 6GHz
OBSS pairing is carried out, meets the standard of next-generation WiFi, so that the frequency range of 6GHz is utilized effectively, while can effectively inhibit
Co-channel interference in Overlapping Basic Service Set network；
In a communications system, by cooperating with each other come shared resource between network node, relay cooperative is expanded wirelessly
The coverage area of net improves the reliability of spectrum efficiency and communication, improves the service quality of user.
Identical networking, wired interconnection Multi-AP combined with the Relay of full duplex, Relay can be carried out uplink generation
The transmission service of reason, by the way of convergence by multiple STA up-link wireless frames of each AP disposably by the way of cross-carrier
It is transmitted to corresponding AP, not only increases reliability, also improves the efficiency of transmission；
Relay also provides ACK enhancing function for the STA in OBSS, ensure that the quality of the area OBSS communication；
It is converged by aggregated frames using the BA of multiple STA as load, AP is sent to by the way of cross-carrier, reduced anti-
Feedback expense also improves the handling capacity of system simultaneously.
Summary of the invention
In view of the problems of the existing technology, the present invention provides the Multi-AP information under a kind of 6GHz scene to transmit system
System and transmission method.
The invention is realized in this way the Multi-AP information transferring method under a kind of 6GHz scene, comprising:
Multiple AP carry out identical networking, obtain the mutual error message of each AP by wired interconnection；At 6GHz
OBSS pairing is carried out under scape, the frequency range of 6GHz is efficiently used, and inhibits the same frequency in Overlapping Basic Service Set network dry
It disturbs；
In a communications system, shared resource is carried out by cooperating with each other between network node；
Identical networking, wired interconnection Multi-AP in conjunction with full duplex Relay, utilize Relay to carry out uplink agency
Transmission service, is disposably forwarded multiple STA up-link wireless frames of each AP by the way of convergence by the way of cross-carrier
To corresponding AP.
Further, Relay is also used to provide ACK enhancing function for the STA in OBSS.
Further, OBSS pairing is carried out under 6GHz scene includes:
1) LeaderAP or AC controls each AP and individually sends downlink data one by one, and all STA receive the downlink of whole AP
Data, and each signal strength measured is converged in into an Action frame and is reported to associated AP；
2) AP receive after the Action frame reported of relevant STA, by the relevant information convergence of the relevant STA of institute to make by oneself
Adopted ethernet frame is reported to leader AP or AC by wired；
3) Leader AP or AC summarizes the beamforming scenario of AP signal strength and each AP near each STA, which judges
STA is in more overlay regions BSS and is interfered by the downlink of which AP, generates STA and is disturbed intensity registration form；
4) Leader AP is disturbed intensity registration form according to STA, generates the pairing matrix A ij of N*N；Aij value is 1, it is believed that
Pairing, Aij value is 0, then unpaired；
5) for STA not with self pair, Aii value is denoted as 0.
6) all STA in same BSS, it is believed that unpaired, Aij is denoted as 0；
7) to the STA only existed in a BSS, default different from associated AP and unequal by the STA of STA associated AP interference
Pairing, Aij value are denoted as 1；
8) for the STA being in p BSS simultaneously, unpaired with all STA under this p AP, Aii value is denoted as
0；Default and do not matched by this p BSS STA interfered under (M-p) a AP, Aij value is denoted as 1；
9) for the STA simultaneously among M BSS, without pairing, with described outside the M centre BSS STA
STA pairing matrix value Aij is denoted as 0.
Further, in step 7), user starts to match according to the pairs of STA that pairing matrix A intermediate value is 1, and AP is sent
After downlink data, if pairing user i and user j is properly received, ACK is replied, ACK also will include corresponding timestamp information；
The ACK information that all AP will be received in each period is reported to leader AP or AC by wired mode；
In step 8), leader AP or AC judge the pairing user i and user j under the AP of beam forming simultaneously, if respectively
Two ACK with identical time stamp are had successfully received in respective AP, then it is assumed that successful matching, it is on the contrary then think that pairing fails；
In step 9), leader AP or AC count the multiple pairing situation of i and j, and successful matching probability matrix is arranged accordingly
Bij, when matching failure rate greater than certain value, it is believed that unpaired, then it is 0 that Bij, which is arranged, for matching user, re-starts survey
Measure Aij.
Further, the combination of Multi-AP and full duplex Relay includes:
More AP6GHz identical networkings, by wired interconnection, a Relay is associated with multiple AP simultaneously；
It when STA has data to be sent to AP, is first associated with AP, AP believes according to the quality of uplink signal and RSSI of the STA of service
Breath, notice Relay carry out uplink agency's transmission service；
When multiple STA send upstream data to corresponding AP, STA4, STA5 and STA8 have upstream data to be sent to
AP1, STA6 and STA7 have upstream data to be sent to AP2；Relay carries out agency's clothes to AP1 and AP2 in different frequency ranges simultaneously
Business.
Further, STA4 is first successfully accessed channel, and STA5 and STA8 detect that channel is not idle, keep out of the way automatically；STA4 to
AP1 sends data packet, while Relay also receives STA4 to the data packet that AP1 is sent, and is learnt by destination address
Data packet sends AP1；The case where AP1 is according to receiving replys BA to STA4 and Relay；
STA4 and Relay according to the BA frame received learns data that STA4 is sent, and which is properly received by AP1, which does not have
It is properly received by AP1.
Further, STA4 and Relay according to the BA frame received learns data that STA4 is sent which is properly received by AP1,
During which is not properly received by AP1, the reception condition of data frame includes:
1) STA4 is issued in the data frame of AP1, and AP1 is properly received；Without any retransmission operation, it is only necessary to which AP1 gives
STA4 replys BA；
2) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received also is not successfully received, Zhi Nengyou
STA retransmits the data frame not being properly received by AP；AP1 is not successfully received No. 1 frame, sends BA frame to STA4 according to reception condition,
Relay also receives BA frame, and Relay itself is not successfully received No. 1 frame, can only retransmit No. 1 frame by STA4；
3) STA4 is issued in the data frame of AP1, and the part data Relay that AP1 is not successfully received is properly received；Using STA
All re-transmission or STA partial retransmission；
4) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received all is properly received；Using STA
All re-transmission or STA partial retransmission.
Further, step 3) is using the re-transmission of STA whole or STA partial retransmission, comprising:
3.1) STA is all retransmitted: the data frame that STA is sent to AP, and AP fails to be properly received STA, but Relay is to STA
Part is properly received, and AP sends BA to STA according to reception condition, while Relay also receives BA；If STA fails to seize
Channel is first acted on behalf of by Relay, is sent Relay to AP and is properly received but AP is not successfully received before data frame, until STA at
Function is seized after channel, and STA carries out the re-transmission of data frame to AP further according to the BA frame received before；
3.2) STA partial retransmission: STA sends data frame to AP, and AP fails the portion Relay in the data being properly received to STA
Divide and be properly received, AP sends BA to STA according to reception condition, while Relay also receives BA；For requirement of real-time height
Data, first from Relay to AP send AP be not successfully received but Relay be properly received data, while Relay to STA reply
BA ', the data that AP is not successfully received before instruction but Relay is properly received are existing to be properly received by AP, and STA only needs to retransmit later
The data not being properly received again by Relay are not properly received by AP before；
For the not high data of requirement of real-time, first reply BA ' from Relay to STA, before instruction AP be not successfully received but
The data that Relay is properly received are existing to be properly received by AP, be not properly received by AP before STA only needs to retransmit later and not by
The data that Relay is properly received, it is subsequent to be acted on behalf of by Relay.
Further, step 4) is using the re-transmission of STA whole or STA partial retransmission, comprising:
4.1) data frame high to requirement of real-time is taken: the data frame that STA is sent to AP, and AP fails successfully to meet STA
It receives, but Relay is properly received the part STA, AP sends BA to STA according to reception condition, while Relay also meets BA
It receives；If STA fails to seize channel, first acted on behalf of by Relay, is not successfully received to AP transmission Relay successful reception but before AP
Data frame, after STA successfully seizes channel, STA carries out the re-transmission of data frame to AP further according to the BA frame received before；
4.2) partial retransmission: STA sends data frame to AP, for AP fail in received data Relay all at
Function receives, and AP sends BA to STA according to reception condition, while Relay also receives BA；The number high for requirement of real-time
According to, the data that AP is not successfully received but Relay is properly received first are sent from Relay to AP, while Relay replys BA ' to STA,
The data that AP is not successfully received before instruction but Relay is properly received are existing to be properly received by AP, and STA is no longer retransmitted later；
For the not high data of requirement of real-time, first reply BA ' from Relay to STA, before instruction AP be not successfully received but
The data that Relay is properly received are existing to be properly received by AP, and STA is no longer retransmitted later, subsequent to be acted on behalf of by Relay.
The another object that the present invention is sent out is to provide a kind of Multi-AP information transmission side implemented under the 6GHz scene
The Multi-AP information transmission system under the 6GHz scene of method.
In conclusion advantages of the present invention and good effect are as follows:
The frequency spectrum of next-generation WiFi extended to 6GHz, in order to improve the spectrum efficiency and link of broadband wireless communications
Reliability enables this frequency range of 6GHz effectively to be applied, and the present invention is mainly from the angle that wireless resource management and QoS ensure
Spend more AP expansion research to being worked in next-generation WiFi in 6GHz.In the present invention, 6GHz, more AP be using identical networking,
The mode of wired interconnection can carry out OBSS pairing in 6GHz frequency range.
Simultaneously in order to realize the larger range of covering of network, further promotes the performance of the area OBSS STA and to improve system whole
Body performance, by Multi-AP in conjunction with Relay, Relay can be associated with multiple AP simultaneously, supported multiple frequency ranges, supported simultaneously
Cross-carrier full duplex.
Detailed description of the invention
Fig. 1 is the progress OBSS matching method flow chart provided in an embodiment of the present invention under 6GHz scene.
Fig. 2 is the Multi-AP information transferring method schematic diagram under 6GHz scene provided in an embodiment of the present invention.
Fig. 3 is Action frame format figure provided in an embodiment of the present invention.
Fig. 4 is ethernet frame format figure provided in an embodiment of the present invention.
Fig. 5 user provided in an embodiment of the present invention starts to match according to that can match the pairs of STA that matrix A intermediate value is 1,
After AP sends downlink data, if pairing user i and user j is properly received, ACK is replied, ACK also will include corresponding timestamp
Hum pattern.
The ACK information that Fig. 6 all AP provided in an embodiment of the present invention will be received in each period, passes through wired mode
It is reported to leader AP or AC figure.
Fig. 7 more AP provided in an embodiment of the present invention are 6GHz identical networkings, and by wired interconnection, Relay can be with
Figure associated with multiple AP simultaneously.
Fig. 8 is provided in an embodiment of the present invention in 6GHz, schemes when multiple STA send upstream data to corresponding AP.
Fig. 9 is provided in an embodiment of the present invention by taking Relay is in BSS1 progress uplink agency service as an example.In 6GHz frequency range,
STA4, STA5 and STA8 have upstream data to be transmitted to AP1, three STA contention access channel mappings.
Figure 10 is that STA4 provided in an embodiment of the present invention is issued in the data frame of AP1, and AP1 is properly received figure.
Figure 11 is that STA4 provided in an embodiment of the present invention is issued in the data frame of AP1, the data that AP1 is not successfully received
Relay is also not successfully received, and can only retransmit the data frame figure not being properly received by AP by STA at this time.
Figure 12 is STA provided in an embodiment of the present invention further according to the BA frame received before, and the re-transmission of data frame is carried out to AP
Figure.
Figure 13 is the datagram high for requirement of real-time provided in an embodiment of the present invention.
Figure 14 is the datagram not high for requirement of real-time provided in an embodiment of the present invention.
Figure 15 is that STA provided in an embodiment of the present invention all adopt by re-transmission data frame mainly relatively high to requirement of real-time
The mode process taken is as schemed.
Figure 16 is in partial retransmission provided in an embodiment of the present invention, and STA sends data frame to AP, fails and connects for AP
Relay is all properly received in the data of receipts, and AP sends BA to STA according to reception condition, while Relay also receives BA
The datagram high for requirement of real-time.
Figure 17 is in this partial retransmission provided in an embodiment of the present invention, for the not high datagram of requirement of real-time.
Figure 18 is the Relay agency that the not high situation of corresponding data requirement of real-time provided in an embodiment of the present invention carries out
STA carries out the cross-carrier retransmission service figure of data.
Figure 19 is convergence data frame figure provided in an embodiment of the present invention.
Figure 20 is provided in an embodiment of the present invention when STA is located at the boundary BSS and in OBSS, the ACK that STA is replied to the AP
Not only signal is weak, but also is highly prone to the interference of other BSS, prevent AP is from being properly received figure to the ACK.
Figure 21 is provided in an embodiment of the present invention in 6GHz frequency range, and STA will reply BA frame to AP, while associated with the AP
Relay can also carry out reception figure to the BA frame.
Figure 22 is that STA provided in an embodiment of the present invention normally sends BA to AP in 6GHz when receiving downlink data, simultaneously
Relay also receives the BA frame.STA1, STA2 and STA3 after having received the downlink data of AP, contention access channel to
AP sends BA frame, the automatic backoff diagram if channel busy.
Figure 23 is BA aggregated frames figure provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Next-generation WiFi is by spread spectrum to 6GHz, therefore all AP for operating in 6GHz will be supported in 6GHz and 2.4/
It works under 5.8GHz multiband.And existing Multi-AP technology is all based on 2.4/5.8GHz scene, it is existing in OBSS
Many methods are all that will interfere elimination or be reduced to acceptable level, to realize simultaneous transmission, and 6GHz not just
Formula is supported.Present Relay technology is mostly the realization in physical layer, comparatively lacks the support of some communication mechanisms, and
And also it is not applied to 6GHz.
To solve the above problems, the present invention is described in detail with reference to the accompanying drawing.
Multi-AP information transferring method under 6GHz scene provided in an embodiment of the present invention, comprising:
Multiple AP carry out identical networking, obtain the mutual error message of each AP by wired interconnection；At 6GHz
OBSS pairing is carried out under scape, the frequency range of 6GHz is efficiently used, and inhibits the same frequency in Overlapping Basic Service Set network dry
It disturbs；
In a communications system, shared resource is carried out by cooperating with each other between network node；
Identical networking, wired interconnection Multi-AP in conjunction with full duplex Relay, utilize Relay to carry out uplink agency
Transmission service, is disposably forwarded multiple STA up-link wireless frames of each AP by the way of convergence by the way of cross-carrier
To corresponding AP.
Relay is also used to provide ACK enhancing function for the STA in OBSS.
As shown in Figure 1, the progress OBSS pairing provided in an embodiment of the present invention under 6GHz scene includes:
S101, LeaderAP or AC control each AP and individually send downlink data one by one, and all STA are received under whole AP
Row data, and each signal strength measured is converged in into an Action frame and is reported to associated AP.
S102, AP receive after the Action frame reported of relevant STA, by the relevant information of the relevant STA of institute converge with
Customized ethernet frame is reported to leader AP or AC by wired.
S103, Leader AP or AC summarize the beamforming scenario of AP signal strength and each AP near each STA, judgement
Which STA is in more overlay regions BSS and is interfered by the downlink of which AP, generates STA and is disturbed intensity registration form.
S104, Leader AP are disturbed intensity registration form according to STA, generate the pairing matrix A ij of N*N；Aij value is 1,
Think to match, Aij value is 0, then unpaired.
Not with self pair, Aii value is denoted as 0 by S105, STA.
All STA in S106, same BSS, it is believed that unpaired, Aij is denoted as 0.
S107, to the STA only existed in a BSS, default is different from associated AP and not by STA associated AP interference
STA is matched, and Aij value is denoted as 1.
S108, for the STA being in p BSS simultaneously, unpaired with all STA under this p AP, Aii value is remembered
It is 0；Default and do not matched by this p BSS STA interfered under (M-p) a AP, Aij value is denoted as 1.
S109, for the STA simultaneously among M BSS, without pairing, with described outside the M centre BSS STA
STA pairing matrix value Aij be denoted as 0.
Fig. 2 is the Multi-AP information transferring method schematic diagram under 6GHz scene provided in an embodiment of the present invention.
The invention will be further described combined with specific embodiments below.
Embodiment one
6GHz OBSS pairing:
1) LeaderAP or AC controls each AP and individually sends downlink data one by one, and all STA receive the downlink of whole AP
Data, and each signal strength measured is converged in into an Action frame and is reported to associated AP.Action frame format such as Fig. 3 and table
1
Table 1
2) AP receive after the Action frame reported of relevant STA, by the relevant information convergence of the relevant STA of institute to make by oneself
Adopted ethernet frame is reported to leader AP or AC by wired.
Ethernet frame format is as shown in Figure 4.
3) Leader AP or AC summarizes AP (M) signal strength and the beam forming of each AP etc. of each STA (N number of) nearby
Situation judges which STA is in more overlay regions BSS and is interfered by the downlink of which AP, generates STA and be disturbed intensity registration form 2.
Table 2
4) Leader AP is disturbed intensity registration form according to STA, and generate N*N matches matrix A ij.Aij value is 1, is recognized
For that can match, Aij value is 0, then can not match.
5) STA can not be with self pair, therefore Aii value is denoted as 0.
6) all STA in same BSS, it is believed that can not match, Aij is denoted as 0.
7. pair only exist in the STA (being respectively less than threshold value T by the interference strength of other (M-1) a AP) in a BSS, default with
Associated AP is different and can not matched by the STA that the STA associated AP is interfered, and Aij value is denoted as 1.
User starts to match according to that can match the pairs of STA that matrix A intermediate value is 1, after AP sends downlink data, if matching
User i and user j is properly received, then replys ACK, ACK also will include corresponding timestamp information.As shown in Figure 5.
The ACK information that all AP will be received in each period is reported to leader AP or AC by wired mode.
As shown in Figure 6.
8) it for the STA being in p BSS simultaneously, can not be matched with all STA under this p AP, Aii value is remembered
It is 0.Default and can not matched by this p BSS STA interfered under other (M-p) a AP, Aij value is denoted as 1.
Leader AP or AC judge the pairing user i and user j under the AP of beam forming simultaneously, if it is respectively respective
The there AP have successfully received two ACK with identical time stamp, then it is assumed that the two successful matching, it is on the contrary then think pairing mistake
It loses.
9) for the STA simultaneously among M BSS, without matching, matrix value is matched with other all STA
Aij is denoted as 0.
Leader AP or AC count the multiple pairing situation of i and j, successful matching probability matrix Bij are arranged accordingly, when matching
To failure rate be greater than certain value when, it is believed that can not match, then be arranged Bij be 0, for user can not be matched, then need again into
Row measurement Aij.
Embodiment two
The combination of Multi-AP and full duplex Relay:
In the present solution, being to combine Multi-AP and Relay, Relay supports multiple carrier waves, is provided simultaneously with cross-carrier
The ability of full duplex.More AP are 6GHz identical networkings, and by wired interconnection, a Relay can be related to multiple AP simultaneously
Connection, as shown in Figure 7.
When 6GHz, STA have data to be sent to AP, be first associated with AP, AP according to the quality of uplink signal of the STA of service with
RSSI information, notice Relay can carry out uplink agency's transmission service.
In 6GHz, when multiple STA send upstream data to corresponding AP, as shown in figure 8, STA4, STA5 and
STA8, which has upstream data to be sent to AP1, STA6 and STA7, has upstream data to be sent to AP2.Relay can be in different frequency ranges pair
AP1 and AP2 carries out agency service simultaneously.
By Relay for BSS1 carries out uplink agency service.In 6GHz frequency range, STA4, STA5 and STA8 have uplink
Data will be transmitted to AP1, three STA contention access channels.As shown in Figure 9.
Assuming that STA4 is first successfully accessed channel, for STA5 and STA8, detects that channel is not idle, keep out of the way automatically.
STA4 sends data packet to AP1, while Relay also receives the data, and learns that data packet is by destination address
To AP1's.The case where AP1 is according to receiving replys BA to STA4 and Relay.STA4 and Relay is learnt according to the BA frame received
Which is properly received the data that STA4 is sent by AP1, which is not properly received by AP1, connects in conjunction with AP and Relay to data
Situation is received, four classes can be divided into.
In embodiments of the present invention, the reception condition of data frame can substantially be divided into four classes.Include:
1) STA4 is issued in the data frame of AP1, and AP1 is properly received.As shown in Figure 10, it is not necessarily to any retransmission operation, only
AP1 is needed to reply BA to STA4；
2) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received also is not successfully received, and at this time can only
The data frame not being properly received by AP is retransmitted by STA.As shown in figure 11, AP1 is not successfully received No. 1 frame, according to reception condition to
STA4 sends BA frame, and Relay also receives the BA frame, since Relay itself is not successfully received No. 1 frame, Zhi Nengyou
STA4 retransmits No. 1 frame；
3) STA4 is issued in the data frame of AP1, and the part data Relay that AP1 is not successfully received is properly received.For this kind of
STA all re-transmission or STA partial retransmission can be used in situation again.
3.1) STA is all retransmitted: the mode that this data frame mainly relatively high to requirement of real-time is taken, and Relay
It is transparent for STA.The data frame that STA is sent to AP, AP fail to be properly received it, but Relay to its part at
Function receives, and AP sends BA to STA according to reception condition, while Relay also receives BA.If STA fails to seize letter at this time
Road can be acted on behalf of first by Relay, send Relay to AP and be properly received but AP is not successfully received before data frame, until STA at
Function is seized after channel, and STA carries out the re-transmission of data frame to AP further according to the BA frame received before, as shown in figure 12:
3.2) STA partial retransmission: STA sends data frame to AP, and AP fails the part Relay in the data being properly received to it
It is properly received, AP sends BA to STA according to reception condition, while Relay also receives BA.It is high for requirement of real-time
Data, as shown in figure 13.The data that AP is not successfully received but Relay is properly received first can be sent from Relay to AP, simultaneously
Relay replys BA ' to STA, and the data that AP is not successfully received before instruction but Relay is properly received are existing to be properly received by AP, it
The data for not only being properly received by AP before STA only needs to retransmit afterwards but also not being properly received by Relay.
In embodiments of the present invention, the data not high for requirement of real-time, as shown in figure 14.It can be first from Relay to STA
BA ' is replied, the data that AP is not successfully received before instruction but Relay is properly received are existing to be properly received by AP, and STA only needs later
The data for not only being properly received by AP before retransmitting but also not being properly received by Relay, it is subsequent to be acted on behalf of by Relay；
4) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received all is properly received.For this kind of
STA all re-transmission or STA partial retransmission can be used in situation again.
4.1) STA all retransmits the modes that mainly data frame relatively high to requirement of real-time is taken, this kind of situation and
The STA of " STA4 is issued in the data frame of AP1, and the part data Relay that AP1 is not successfully received is properly received " is whole in situation c
Retransmission scheme be it is the same, process is as shown in figure 15.
4.2) partial retransmission: STA sends data frame to AP, for AP fail in received data Relay all at
Function receives, and AP sends BA to STA according to reception condition, while Relay also receives BA.The number high for requirement of real-time
According to as shown in figure 16.
The data that AP is not successfully received but Relay is properly received first can be sent from Relay to AP, while Relay is returned to STA
Multiple BA ', the data that AP is not successfully received before instruction but Relay is properly received are existing to be properly received by AP, and STA is no longer heavy later
It passes.
In embodiments of the present invention, the data not high for requirement of real-time, as shown in figure 17.
BA ' first can be replied from Relay to STA, the data that AP is not successfully received before instruction but Relay is properly received show quilt
AP is properly received, and STA is no longer retransmitted later, subsequent to be acted on behalf of by Relay.
It is that the Relay that the not high situation c3 of corresponding data requirement of real-time is carried out acts on behalf of STA progress data as shown in figure 18
Cross-carrier retransmission service.
For all from STA4 to the frame of AP1 transmission failure, Relay is properly received, then replys BA from Relay to STA4,
STA4 is no longer retransmitted, and is cached by Relay.STA5 and STA8 contention access channel later, equally, if STA5 or STA8 are sent to
The data Relay of AP1 is properly received and caches, then STA5 or STA8 are no longer retransmitted, finally by Relay disposably by three
A STA is sent to AP1 but the data of error carry out cross-carrier re-transmission, disposably can be sent to AP1 in 2.4GHz by convergence.
The agency service that Relay carries out BSS2 is similarly aforesaid operations.
In embodiments of the present invention, convergence data frame is as shown in figure 19.
When carrying out the convergence of error data, the frame ethod of remittance of use is as conventional method, as shown above.In order to
The data aggregated frames of the error forwarding of this programme and traditional aggregated frames are distinguished, this programme is by each separator of aggregated frames
In reserved field be set as 1 as label.
Relay, which provides ACK for the STA of multiple AP service boundaries overlay region, enhances transfer function:
When STA is located at the boundary BSS and is in OBSS, not only signal is weak by the ACK that STA is replied to the AP, but also is highly prone to
The interference of other BSS, prevent AP is from being properly received the ACK.As shown in figure 20.
STA5 belongs to the OBSS of BSS1, BSS2 and BSS3, and when STA5 will send ACK to AP2, Relay simultaneously also can be right
The ACK is received, and is learnt by the physical address in ACK and is intended for AP2, and Relay will be forwarded after ack signal amplification again
To AP2, AP2 improves the performance of the area OBSS user by carrying out joint reception to the ACK of STA5 and Relay reply.
Relay and AP negotiation provides BA for some higher STA of BA Loss Rate and acts on behalf of transfer function:
In 6GHz frequency range, STA will reply BA frame to AP, while can also carry out to the BA frame with the associated Relay of the AP
It receives, as shown in figure 21.
If the BA frame loss rate of STA4 to AP1 is relatively high, if continuing to send BA from STA4 to AP1, will cause entire
Network communication efficiency is low.If Relay is properly received the BA frame, Relay provides cross-carrier BA agency for STA4
Transfer function sends BA to AP1 in 2.4GHz, until AP1 is properly received BA, further increases the reliability of link.
Relay can be sent to using the BA of multiple STA as load convergence by same frequency or alien frequencies channel by aggregated frames
AP:
STA normally sends BA to AP in 6GHz when receiving downlink data, while Relay also receives the BA frame.
After having received the downlink data of AP, contention access channel sends BA frame to AP, automatic if channel busy by STA1, STA2 and STA3
Keep out of the way.As shown in figure 22.
STA1 sends BA1 to AP, and Relay is properly received BA1, and STA2 sends BA2 to AP, and AP is not properly received BA2,
But Relay is properly received BA2, and AP is not properly received BA3, and Relay is properly received BA3, later, Relay aggregated frames
BA1, BA2 and BA3 are disposably sent to AP in 2.4GHz by the way of cross-carrier, AP is further according to the Relay received and respectively
The BA that STA is sent carries out downlink retransmission process, not only ensure that the reliability of communication link in this way, also reduces opening for feedback
Pin.
In embodiments of the present invention, BA aggregated frames are as shown in figure 23.
When carrying out the convergence of BA frame as the convergence of data frame, only using BA frame as the MPDU in polymerization.Together
Sample, in order to distinguish the convergence of this programme BA frame and other convergence, this programme is by the reservation in each separator of aggregated frames
Field is set as 0 as label.
Below with reference to effect, the invention will be further described.
Multiple AP carry out identical networking, the mutual error situation of each AP are understood by wired interconnection, in 6GHz
OBSS pairing is carried out, meets the standard of next-generation WiFi, so that the frequency range of 6GHz is utilized effectively, while can effectively inhibit
Co-channel interference in Overlapping Basic Service Set network；
In a communications system, by cooperating with each other come shared resource between network node, relay cooperative is expanded wirelessly
The coverage area of net improves the reliability of spectrum efficiency and communication, improves the service quality of user.
Identical networking, wired interconnection Multi-AP combined with the Relay of full duplex, Relay can be carried out uplink generation
The transmission service of reason, by the way of convergence by multiple STA up-link wireless frames of each AP disposably by the way of cross-carrier
It is transmitted to corresponding AP, not only increases reliability, also improves the efficiency of transmission；
Relay also provides ACK enhancing function for the STA in OBSS, ensure that the quality of the area OBSS communication；
It is converged by aggregated frames using the BA of multiple STA as load, AP is sent to by the way of cross-carrier, reduced anti-
Feedback expense also improves the handling capacity of system simultaneously.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. the Multi-AP information transferring method under a kind of 6GHz scene, which is characterized in that the Multi- under the 6GHz scene
AP information transferring method includes:
Multiple AP carry out identical networking, obtain the mutual error message of each AP by wired interconnection；Under 6GHz scene into
Row OBSS pairing, efficiently uses the frequency range of 6GHz, and inhibit the co-channel interference in Overlapping Basic Service Set network；
Identical networking, wired interconnection Multi-AP in conjunction with full duplex Relay, utilize Relay carry out uplink agency transmission
Multiple STA up-link wireless frames of each AP are disposably transmitted to by the way of cross-carrier pair by service by the way of convergence
The AP answered.
2. the Multi-AP information transferring method under 6GHz scene as described in claim 1, which is characterized in that Relay is also used
It is serviced in providing ACK enhancing for the STA in OBSS；Multiple AP carry out shared resource by cooperating with each other between network node.
3. the Multi-AP information transferring method under 6GHz scene as described in claim 1, which is characterized in that in 6GHz scene
Lower progress OBSS is matched
1) LeaderAP or AC controls each AP and individually sends downlink data one by one, and all STA receive the downlink data of whole AP,
And each signal strength measured is converged in into an Action frame and is reported to associated AP；
2) AP receive after the Action frame reported of relevant STA, by the relevant information convergence of the relevant STA of institute, with customized
Ethernet frame is reported to leader AP or AC by wired；
3) Leader AP or AC summarizes the AP signal strength of each STA and the beamforming scenario of each AP, judges that STA is in more BSS
Overlay region whether by AP downlink interfere, generate STA be disturbed intensity registration form；
4) Leader AP is disturbed intensity registration form according to STA, generates the pairing matrix A ij of N*N；Aij value is 1, it is believed that is matched
Right, Aij value is 0, then unpaired；
5) for STA not with self pair, Aii value is denoted as 0；
6) all STA in same BSS, it is believed that unpaired, Aij is denoted as 0；
7) to the STA only existed in a BSS, default different from associated AP and do not matched by the STA that the STA associated AP is interfered
Right, Aij value is denoted as 1；
8) for the STA being in p BSS simultaneously, unpaired with all STA under this p AP, Aii value is denoted as 0；It is silent
Recognize and do not matched by this p BSS STA interfered under (M-p) a AP, Aij value is denoted as 1；
9) STA simultaneously among M BSS is matched without pairing with the STA among M BSS outside STA
0 is denoted as to matrix value Aij.
4. the Multi-AP information transferring method under 6GHz scene as claimed in claim 3, which is characterized in that in step 7),
User matches according to the pairs of STA that pairing matrix A intermediate value is 1, and AP sends downlink data, pairing user i and pairing user j
After successful reception, ACK is replied, ACK includes corresponding timestamp information；
The ACK information that all AP will be received in each period is reported to leader AP or AC by wired mode；
In step 8), leader AP or AC judge pairing user i and pairing user j under the AP of beam forming, if respectively each
From AP have successfully received two ACK with identical time stamp, then it is assumed that successful matching, otherwise it is assumed that pairing failure；
In step 9), successful matching is arranged in leader AP or AC statistics pairing user i and the multiple pairing situation for matching user j
Probability matrix Bij, when matching failure rate greater than certain value, it is believed that unpaired, then it is 0 that Bij, which is arranged, for matching user, weight
Newly measure Aij.
5. the Multi-AP information transferring method under 6GHz scene as described in claim 1, which is characterized in that Multi-AP with
The combination of full duplex Relay includes:
More AP6GHz identical networkings, by wired interconnection, a Relay is associated with multiple AP simultaneously；
It when STA has data to be sent to AP, is first associated with AP, AP leads to according to the quality of uplink signal and RSSI information of the STA of service
Know that Relay carries out uplink agency's transmission service；
When multiple STA send upstream data to corresponding AP, STA4, STA5 and STA8 have upstream data to be sent to AP1,
STA6 and STA7 have upstream data to be sent to AP2；Relay carries out agency service to AP1 and AP2 in different frequency ranges simultaneously.
6. the Multi-AP information transferring method under 6GHz scene as claimed in claim 5, which is characterized in that STA4 first succeeds
Channel is accessed, STA5 and STA8 detect that channel is not idle, keep out of the way automatically；STA4 sends data packet, while Relay to AP1
STA4 is received to the data packet that AP1 is sent, and learns that data packet sends AP1 by destination address；AP1 is according to reception
To the case where, BA is replied to STA4 and Relay；
STA4 and Relay according to the BA frame received learns data that STA4 is sent, and which is properly received by AP1, which not by
AP1 is properly received.
7. the Multi-AP information transferring method under 6GHz scene as claimed in claim 6, which is characterized in that STA4 and
Relay according to the BA frame received learns data that STA4 is sent, and which is properly received by AP1, which is not properly received by AP1
In, the reception condition of data frame includes:
1) STA4 is issued in the data frame of AP1, and AP1 is properly received；Without any retransmission operation, it is only necessary to which AP1 is returned to STA4
Multiple BA；
2) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received also is not successfully received, can only be by STA weight
Pass the data frame not being properly received by AP；AP1 is not successfully received No. 1 frame, sends BA frame, Relay to STA4 according to reception condition
Also BA frame is received, Relay itself is not successfully received No. 1 frame, can only retransmit No. 1 frame by STA4；
3) STA4 is issued in the data frame of AP1, and the part data Relay that AP1 is not successfully received is properly received；Using STA whole
Re-transmission or STA partial retransmission；
4) STA4 is issued in the data frame of AP1, and the data Relay that AP1 is not successfully received all is properly received；Using STA whole
Re-transmission or STA partial retransmission.
8. the Multi-AP information transferring method under 6GHz scene as claimed in claim 7, which is characterized in that step 3) uses
STA is all retransmitted or STA partial retransmission, comprising:
A) STA all retransmit: the data frame that STA is sent to AP, AP fail to STA be properly received, but Relay to STA partially at
Function receives, and AP sends BA to STA according to reception condition, while Relay also receives BA；If STA fails to seize channel, first
It is acted on behalf of by Relay, the data frame that Relay is properly received but preceding AP is not successfully received is sent to AP, until STA successfully seizes channel
Afterwards, STA carries out the re-transmission of data frame to AP further according to the BA frame received；
B) STA partial retransmission: STA sends data frame to AP, and AP fails the part Relay success in the data being properly received to STA
It receives, AP sends BA to STA according to reception condition, while Relay also receives BA；The number high for requirement of real-time
According to, the data that AP is not successfully received but Relay is properly received first are sent from Relay to AP, while Relay replys BA ' to STA,
Not by AP before STA only needs to retransmit after the data that AP is not successfully received before indicating but Relay is properly received now are properly received by AP
It is properly received the data not being properly received again by Relay；
For the not high data of requirement of real-time, BA ' first is replied from Relay to STA, the preceding AP of instruction is not successfully received but Relay
It is not properly received again by AP not by Relay success before STA only needs to retransmit after the data of successful reception are now properly received by AP
Received data, it is subsequent to be acted on behalf of by Relay.
9. the Multi-AP information transferring method under 6GHz scene as claimed in claim 7, which is characterized in that step 4) uses
STA is all retransmitted or STA partial retransmission, comprising:
I) data frame high to requirement of real-time is taken: the data frame that STA is sent to AP, and AP fails to be properly received STA, but
Relay is properly received the part STA, and AP sends BA to STA according to reception condition, while Relay also receives BA；If
STA fails to seize channel, is first acted on behalf of by Relay, sends Relay to AP and is properly received the data frame that AP is not successfully received, STA at
After function seizes channel, STA carries out the re-transmission of data frame to AP further according to the BA frame received；
Ii) partial retransmission: STA sends data frame to AP, and the AP Relay in received data that fails all successfully is connect
It receives, AP sends BA to STA according to reception condition, while Relay also receives BA；The data high for requirement of real-time,
The data that AP is not successfully received but Relay is properly received first are sent from Relay to AP, while Relay replys BA ', instruction to STA
STA is no longer retransmitted after the data that preceding AP is not successfully received but Relay is properly received now are properly received by AP；
For the not high data of requirement of real-time, BA ' first is replied from Relay to STA, the preceding AP of instruction is not successfully received but Relay
STA is no longer retransmitted after the data of successful reception are now properly received by AP, subsequent to be acted on behalf of by Relay.
10. under a kind of 6GHz scene for implementing the Multi-AP information transferring method under 6GHz scene described in claim 1
The Multi-AP information transmission system.
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