CN106817202A - Accidental access method and relevant device - Google Patents

Accidental access method and relevant device Download PDF

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Publication number
CN106817202A
CN106817202A CN201510851913.9A CN201510851913A CN106817202A CN 106817202 A CN106817202 A CN 106817202A CN 201510851913 A CN201510851913 A CN 201510851913A CN 106817202 A CN106817202 A CN 106817202A
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China
Prior art keywords
rssi
sta
subchannels
interval
stochastic accessing
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CN201510851913.9A
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Chinese (zh)
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CN106817202B (en
Inventor
陈晓
王勇
庞继勇
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201510851913.9A priority Critical patent/CN106817202B/en
Priority to PCT/CN2016/084527 priority patent/WO2017092270A1/en
Publication of CN106817202A publication Critical patent/CN106817202A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the present application discloses a kind of accidental access method and relevant device, the method sends indication signaling by AP to STA, indicate the RSSI corresponding to each Stochastic accessing RA subchannels interval, STA is set to be selected to initiate Stochastic accessing in affiliated RSSI intervals according to itself RSSI, and in the RA subchannels being successfully accessed corresponding to affiliated RSSI intervals, the confirmation ACK that upstream data or feedback are successfully accessed is sent to AP.Based on RSSI as packet foundation, interval and STA the RSSI of RSSI according to corresponding to each RA subchannel are grouped, thresholding and interval range are accessed by limiting the channel strength in each RA subchannels, optimization STA accesses distribution, the STA of different RSSI is set to initiate Stochastic accessing in different RA sub-channel resources, not only increase the probability of access, reduce collision, while solving the problems, such as that STA accesses uncontrolled and access delay.

Description

Accidental access method and relevant device
Technical field
The present invention relates to wireless local area network technology field, more specifically to a kind of accidental access method And relevant device.
Background technology
It is quick with current WLAN (Wireless Local Area Networks, WLAN) standard Development, based on up UL (Up link, up connection) OFDMA (Orthogonal Frequency Division Multiplexing Access, OFDM) technology RA (Random Access, Stochastic accessing), Current standards discussion is turned into after OFDMA introduces current wireless Local Area Network current techique standard 11ax Focus, under the dense deployment scene of current wireless Local Area Network current techique standard 11ax, with number of users Increase, the probability that RA clashes collision significantly improves also with the increase of number of users.Therefore, it is Collision probability is reduced as far as possible, access efficiency is lifted, and is at present constrained by setting certain criterion The RA behaviors of user.Currently employed mode or criterion has time domain/frequency domain to keep out of the way, and packet is kept out of the way, and takes turns more Keep out of the way and accessed with centralization, can individually be performed between above-mentioned various ways or criterion to be merged.
Based on above-mentioned mode of the prior art or criterion, the schematic diagram of access procedure as illustrated in FIG. 1, The RA behaviors that user is constrained in access procedure mainly include：
Step one：When being accessed, all of STA (Station, website.Included in Fig. 1 STA1~STA4) one is randomly choosed between [1, CW (Contention Window, competition window)] Count value.
Step 2：When STA receives the TF-R (Trigger of an AP (Access Point, access point) transmissions Frame-Random Access, Stochastic accessing trigger frame) when, the count value (Counter) of STA subtracts 1.
Step 3：When count value is kept to 0, after next TF-R frames, STA randomly chooses a channel Transmission information
Step 4：One identical RACH or resource when two or more STA simultaneous selections When, collision occurs, and STA doubles CW to subtract 1, and return to step one randomly chooses a value, repeats above-mentioned Process.
Using this access way of above-mentioned prior art, because access procedure is not controlled by AP, and by STA randomly chooses numerical value, increased uncertainty, while in the case of STA dense distributions, collision is general Rate is also correspondingly improved, while making access delay long.Based on this, although propose to be solution in the prior art Certainly collide STA is grouped in above process, collision is limited in each packet, make between packet not There is the concept of collision again, but be not given specific, suitable STA be grouped in the prior art Grouping strategy, therefore, still can not reasonably solve the above problems.
The content of the invention
The embodiment of the present application provides a kind of accidental access method and relevant device, based on specific grouping strategy, To solve the problems, such as that STA accesses uncontrolled, collision probability and access delay.
To achieve the above object, the embodiment of the present application provides following technical scheme：
The embodiment of the present application is applied to access point AP in a first aspect, disclose a kind of accidental access method, Including：
Indication signaling is sent to site STA, the reception corresponding to each Stochastic accessing RA subchannels is indicated Signal intensity indicates RSSI interval；
If be successfully received in the RA subchannels confirmation ACK for coming from the STA or During up RA frames, confirm that the STA is successfully accessed in the RA subchannels.
In the first implementation that the embodiment of the present application first aspect is provided, if in Preset Time not The confirmation ACK or up RA frames of any STA are received in the RA subchannels, then really Recognize access failure in the RA subchannels, the RA subchannels are judged again after Backoff time is set On whether be successfully accessed.
It is described to be sent out to site STA in second implementation that the embodiment of the present application first aspect is provided Indication signaling is sent, the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels is indicated Interval, including：
It is interval according to the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels, it is right The site STA of each RA subchannel to be accessed is grouped；
The moment of broadcast indication signaling is determined according to packet, and it is wide to all site STAs within each moment The indication signaling is broadcast, makes to be located at the interval site STA initiations of identical or different RSSI at any one time Stochastic accessing；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon.
It is described to make at any one time in the third implementation that the embodiment of the present application first aspect is provided Stochastic accessing is initiated positioned at identical RSSI interval site STA, including：
The site STA being located in RSSI intervals is set to initiate Stochastic accessing at the first moment, until S Moment makes the site STA being located in the S RSSI interval initiate Stochastic accessing；
Or,
The site STA in any RSSI intervals is set to initiate Stochastic accessing at the first moment, until during S The site STA in any RSSI intervals is set to initiate Stochastic accessing at quarter；
Wherein, S is the positive integer more than or equal to 1.
It is described to each website in the 4th kind of implementation that the embodiment of the present application first aspect is provided STA sends indication signaling, indicates the received signal strength corresponding to each Stochastic accessing RA subchannels to refer to Show that RSSI is interval, including：
It is interval according to the received signal strength indicator RSSI corresponding to M Stochastic accessing RA subchannel, press According to each site STA RSSI belonging to interval RA determined residing for the site STA of RSSI believe Road, and corresponding M packet is divided into, wherein, there is K Resource Block in each RA subchannel RU；
All site STAs in being grouped to M broadcast indication signaling, make to be located at first group to M groups Interior site STA initiates Stochastic accessing, the RU in channel residing for competition each in respective residing channel；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
In the 5th kind of implementation that the embodiment of the present application first aspect is provided, also include：
Receive the RA that the Resource Block RU in the RA subchannels for passing through access by the STA sends Frame, can carry the RSSI of the STA in the RA frames；
The access quantity of the STA that statistics is successfully accessed；
According to the RSSI sizes of the correspondence STA included in each the described RA frame for receiving, docking Enter itself RSSI of the successful STA from being ranked up to small greatly；
The access quantity N of the STA that acquisition is successfully accessed is with the total number M's of the RA subchannels Ratio N/M, wherein, M and N is the positive integer more than or equal to 1；
RSSI based on the STA being successfully accessed is from greatly to small sequence, the maximum N/M of selection Minimum value in individual RSSI value is used as first lower bound of RA subchannels；
Choose the upper bound of the maximum in N/M minimum RSSI value as m-th RA subchannels；
When N is even number, by N/2 RSSI value and (N/2)+1 median of RSSI value Downward round numbers, as the M/2 lower bound of RA subchannels, takes ((N/2)-(N/M) -1) individual RSSI value is the upper bound of the M/2 RA subchannel；The median is rounded and subtracts 1 as (M/2)+1 upper bound of RA subchannels, takes ((N/2)+(N/M)) individual RSSI value as institute State (M/2)+1 lower bound of RA subchannels；
When N is odd number, using the N/2 RSSI value as the lower bound of (M/2) individual channel, the is taken ((N/2)-(N/M) -1) individual RSSI value is the upper bound of the M/2 RA subchannel；By (N/2) + 1 RSSI value takes ((N/2)+(N/M)) as (M/2)+1 upper bound of RA subchannels Individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
The embodiment of the present application second aspect, also discloses a kind of access point AP, including：
Sends module is used for, and indication signaling is sent to site STA, and the indication signaling is used to indicate each Received signal strength indicator RSSI corresponding to Stochastic accessing RA subchannels is interval；
Treatment module is used for, if be successfully received in the RA subchannels coming from the STA really Recognize information ACK, or during up RA frames, confirm that the STA is accessed into the RA subchannels Work(.
In the first implementation that the embodiment of the present application second aspect is provided, the treatment module may be used also For：
If not receiving the confirmation ACK of any STA in the RA subchannels in Preset Time Or up RA frames, then confirm access failure in the RA subchannels, the weight after Backoff time is set Newly judge whether be successfully accessed in the RA subchannels.
In second implementation that the embodiment of the present application second aspect is provided, the treatment module is used for： It is interval according to the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels, will be waiting The site STA for entering each RA subchannel is divided into n groups, and determines broadcast indication signaling according to packet Moment t1,t2,...tn；
Wherein, n is natural number, and n >=1, and the indication signaling includes：Stochastic accessing trigger frame TF-R Or beacon Beacon.
In the third implementation that the embodiment of the present application second aspect is provided, the sends module is used for： At determination moment t1,t2,...tnThe indication signaling is sent to the n groups site STA respectively, is made described Each group site STA initiates Stochastic accessing at the different moment in corresponding RA subchannels；Or
The indication signaling is sent to each group site STA in any instant of the determination, makes each group station Point STA initiates Stochastic accessing in corresponding RA subchannels on the identical time.
In the 4th kind of implementation that the embodiment of the present application second aspect is provided,
The treatment module is used for, strong according to the reception signal corresponding to M Stochastic accessing RA subchannel Degree indicates RSSI interval, according to site STA RSSI belonging to RSSI interval determine the site STA Residing RA subchannels, and corresponding M packet is divided into, wherein, have in each RA subchannel There is K Resource Block RU；
The sends module is used for, and all site STAs in being grouped to M broadcast indication signaling, make position Stochastic accessing is initiated in respective residing channel in the site STA in first group to M groups, competition is respective RU in residing channel；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
In the 5th kind of implementation that the embodiment of the present application second aspect is provided, also include：
Receiving module is used for, and receives the resource in the RA subchannels for passing through access by the STA The RA frames that block RU sends, can carry itself RSSI of the STA in the RA frames；
The treatment module is additionally operable to, the access quantity of the STA that statistics is successfully accessed；
For itself RSSI according to the correspondence STA included in each the described RA frame for receiving Size, to accessing itself RSSI of the successfully STA from being ranked up to small greatly；
For obtaining the access quantity N of the STA being successfully accessed and the total number of the RA subchannels The ratio N/M of M, wherein, M and N is the positive integer more than or equal to 1；
For itself RSSI based on the STA being successfully accessed from greatly to small sequence, selection Minimum value in N/M maximum RSSI value is used as first lower bound of RA subchannels；For choosing most Maximum in N/M small RSSI value as m-th RA subchannels the upper bound；And when N is even During number, by the downward round numbers of median of N/2 RSSI value and (N/2)+1 RSSI value, Used as the M/2 lower bound of RA subchannels, it is described to take ((N/2)-(N/M) -1) individual RSSI value The M/2 upper bound of RA subchannels；The median is rounded and subtracts 1 as (M/2)+1 RA The upper bound of channel, takes ((N/2)+(N/M)) individual RSSI value as (M/2)+1 RA The lower bound of subchannel；And when N is odd number, using the N/2 RSSI value as (M/2) individual channel Lower bound, it is the upper of the M/2 RA subchannel to take ((N/2)-(N/M) -1) individual RSSI value Boundary；Using (N/2)+1 RSSI value as (M/2)+1 upper bound of RA subchannels, take ((N/2) + (N/M)) individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
The embodiment of the present application third aspect, also discloses a kind of packet accidental access method, is applied to website STA, including：
The indication signaling that access point AP sends is received, the indication signaling is used for each Stochastic accessing for indicating The corresponding received signal strength indicator RSSI of RA subchannels is interval；
The corresponding RA subchannels of affiliated RSSI interval selections of RSSI according to the site STA initiate with Machine is accessed；
If being successfully accessed the corresponding RA subchannels, it is successfully accessed to described access point AP feedbacks Confirmation ACK sends up RA frames.
It is described according to the website in the first implementation that the embodiment of the present application third aspect is provided The corresponding RA subchannels of the affiliated RSSI interval selections of RSSI of STA initiate Stochastic accessing, including：
Judge whether the RSSI of the site STA belongs to the current RSSI intervals for allowing and accessing, if it is not, Subsequent time is then waited to rejudge；
If so, then randomly choosing a Resource Block RU in the interval corresponding RA subchannels of affiliated RSSI Accessed, or using the quantitative value of RU in the associated identifiers AID mould channels of the site STA as The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
It is described according to the website in second implementation that the embodiment of the present application third aspect is provided The corresponding RA subchannels of the affiliated RSSI interval selections of RSSI of STA initiate Stochastic accessing, including：
Determine that affiliated RSSI is interval according to the RSSI of the site STA；
With the quantitative value of RU in the associated identifiers AID mould channels of the site STA, conduct is taken the remainder The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
In the third implementation that the embodiment of the present application third aspect is provided, also include：
If the RSSI that the RSSI of the site STA is not belonging to any one correspondence RA subchannel is interval interior, The interval corresponding RA subchannels of adjacent RSSI are then selected to initiate Stochastic accessing up or down.
It is described to described access point in the 4th kind of implementation that the embodiment of the present application third aspect is provided AP sends up RA frames, including：
Up RA frames are sent to the AP by the Resource Block RU in the RA subchannels of access, Itself RSSI of the STA can be carried in the RA frames.
The embodiment of the present application fourth aspect, also discloses a kind of site STA, including：
Receiver module is used for, and receives the indication signaling that access point AP sends, and obtains the indication signaling signified The corresponding received signal strength indicator RSSI of each Stochastic accessing RA subchannels for showing is interval；
Processing module is used for, corresponding according to the affiliated RSSI interval selections of the RSSI of the site STA RA subchannels initiate Stochastic accessing；
Feedback module, if for being successfully accessed the corresponding RA subchannels, stating access point AP transmissions The confirmation ACK or the up RA frames of transmission being successfully accessed.
In the first implementation that the embodiment of the present application fourth aspect is provided, the processing module is also used In：
Judge whether itself RSSI belongs to the current RSSI intervals for allowing and accessing, if it is not, then waiting next Moment rejudges；
If so, then randomly choosing a Resource Block RU in the interval corresponding RA subchannels of affiliated RSSI Accessed, or the RU with the quantitative value of RU in the associated identifiers AID mould channels of itself alternatively Numbering, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
In second implementation that the embodiment of the present application fourth aspect is provided, the processing module is also used In：
Determine that affiliated RSSI is interval according to itself RSSI；And
With the quantitative value of RU in the associated identifiers AID mould channels of the site STA, conduct is taken the remainder The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
In the third implementation that the embodiment of the present application fourth aspect is provided, the processing module is also used In：
If the RSSI that the RSSI of the site STA is not belonging to any one correspondence RA subchannel is interval interior, The interval corresponding RA subchannels of adjacent RSSI are then selected to initiate Stochastic accessing up or down.
In the 4th kind of implementation that the embodiment of the present application fourth aspect is provided, the sending module is used for, Up RA frames are sent to the AP by the Resource Block RU in the RA subchannels of access, it is described The RSSI of the STA can be carried in RA frames.
The aspect of the embodiment of the present application the 5th, also discloses a kind of random access system, including：Above-mentioned this Shen Access point AP that please be described disclosed in embodiment second aspect and above-mentioned the embodiment of the present application fourth aspect are public The described site STA opened.
A kind of accidental access method and relevant device provided by above scheme, the embodiment of the present application, The method sends indication signaling by access point AP to site STA, indicates each Stochastic accessing RA Received signal strength indicator RSSI corresponding to channel is interval, the STA is selected according to itself RSSI Stochastic accessing is initiated in affiliated RSSI is interval, and in the RA being successfully accessed corresponding to affiliated RSSI intervals Subchannel, the confirmation ACK being successfully accessed to described access point AP feedbacks or the up RA of transmission Frame, described access point AP confirms after the confirmation ACK or the up RA frames is received It is successfully accessed.By above-mentioned received signal strength indicator RSSI according to corresponding to RA subchannels it is interval and The RSSI of site STA is grouped, and makes the STA of different RSSI in different RA sub-channel resources Stochastic accessing is initiated, the probability of access is not only increased, collision is reduced, while also solve STA accessing not The problem of controlled and access delay.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to reality The accompanying drawing to be used needed for example or description of the prior art is applied to be briefly described, it should be apparent that, below Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, On the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the application disclosed access procedure schematic diagram in the prior art；
Fig. 2 is a kind of flow chart of accidental access method disclosed in the embodiment of the present application one；
Fig. 3 is a kind of flow chart of accidental access method disclosed in the embodiment of the present application three；
Fig. 4 be distributions of 20 STA on the BSS disclosed in the embodiment of the present application four and its from The schematic diagram of body RSSI；
Fig. 5 is the diagram of access process disclosed in example one in the embodiment of the present application four；
Fig. 6 is the diagram of access process disclosed in example two in the embodiment of the present application four；
Fig. 7 is a kind of structural representation of AP disclosed in the embodiment of the present application five；
Fig. 8 is a kind of composition figure of AP disclosed in the embodiment of the present application five；
Fig. 9 is a kind of structural representation of STA disclosed in the embodiment of the present application five；
Figure 10 is a kind of composition figure of STA disclosed in the embodiment of the present application five.
Specific embodiment
Below for the full name of the english abbreviation arrived used in the embodiment of the present application is explained with Chinese：
WLAN：Wireless Local Area Networks, WLAN；
UL：Up link, up connection；
OFDMA：Orthogonal Frequency Division Multiplexing Access, orthogonal frequency is more Location
RA：Random Access, Stochastic accessing；
STA：Station, website；
TF-R：Trigger Frame-Random Access, Stochastic accessing trigger frame；
Beacon：Beacon；
CSI：Channel State Information, channel condition information；
CW：Contention Window, competition window；
RU：Resource Units, Resource Block；
RSSI：Received Signal Strength Indication, received signal strength indicator；
AP：Access Point, access point；
AID：Association Identifier, associated identifiers；
TPC：Transmit Power Control, transmitting power control；
ACK：Acknowledgment, confirms；
BSS：Basic Service Set, Basic Service Set.
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out Clearly and completely describe, it is clear that described embodiment is only some embodiments of the present application, and It is not all, of embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not doing Go out the every other embodiment obtained under the premise of creative work, belong to the scope of the application protection.
From background technology, in the case of STA dense distributions, to solve touched when STA is accessed Hit that probability is high, access delay problem long, prior art proposes that STA is grouped will collision limitation Grouping concept in each packet, but do not provide specific, suitable to STA in the prior art The grouping strategy being grouped, still cannot solve the above problems.Thus, the embodiment of the present application is disclosed A kind of accidental access method and relevant device, RSSI according to corresponding to each RA subchannel it is interval and The RSSI of STA is grouped, and the STA of different RSSI is initiated in different RA sub-channel resources Stochastic accessing, not only increases the probability of access, reduces collision, at the same solve STA access it is uncontrolled and The problem of access delay.
The reason for RSSI is selected in following specific embodiment disclosed in the present application as packet foundation is main It is：Firstth, RSSI is one of most easy network parameter for obtaining, and STA can be in RA frames or CSI feedback frame It is middle that RSSI is reported to AP；Even the user the second, being initially accessed, it is also possible to according to itself RSSI To select to access channel；3rd, because the RSSI difference of the user in identical interval is relatively small, therefore The unjustness problem of AP always locking signal strong websites when can avoid accessing simultaneously；4th, RSSI Distribution situation and disturbed condition of the user in BSS can be reflected, therefore combine RSSI, AP can be with Indicate the TPC parameters on different access signals in the lump in TF-R, and can be assisted between neighbor bss S The access channel that tune staggers corresponding to same or like RSSI intervals.Thus, will in the embodiment of the present application RSSI is used as a key factor in grouping strategy, and the factor that comprehensive other packets are related to, such as AID, class of service etc. can provide the packet mode of different weights.Specific framework and implementation process, pass through Specific examples below is described in detail.
Embodiment one
As shown in Fig. 2 disclosed in the embodiment of the present application one a kind of flow chart of accidental access method, should Packet accidental access method is applied to AP, mainly includes：
Step S101, the AP send indication signaling to STA, indicate corresponding to each RA subchannel RSSI it is interval；
In step S101, one or more STA are distributed in each RA subchannel, each STA With respective RSSI value, after AP sends indication signaling to STA, the indication signaling is used to indicate respectively RSSI corresponding to individual RA subchannels is interval, is selected in affiliated RSSI according to itself RSSI value by STA Stochastic accessing is initiated in interval.
Step S102, if the AP is properly received in the RA subchannels comes from the STA's When confirmation ACK or up RA frames, confirm that the STA is accessed into the RA subchannels Work(.
In step s 102, confirmation ACK successfully connects for the STA according to its own RSSI Enter the confirmation ACK sent after the RA subchannels corresponding to affiliated RSSI intervals.
The embodiment of the present application one selects RSSI as packet foundation, according to each RA by said process Interval and STA itself RSSI packets of RSSI corresponding to subchannel carry out Stochastic accessing, make difference The STA of RSSI initiates Stochastic accessing in different RA sub-channel resources, not only increases the probability of access, Collision is reduced, while solving the problems, such as that STA accesses uncontrolled and access delay.
Embodiment two
Based on a kind of accidental access method disclosed in above-mentioned the embodiment of the present application one, STA is received in AP anti- During the confirmation ACK of feedback or up RA frames, if not in the RA in Preset Time The confirmation ACK or up RA frames of any STA are received in subchannel, then confirms the RA Whether access failure in subchannel, judges accessed in the RA subchannels again after Backoff time is set Success.
Based on the step 101 in a kind of accidental access method disclosed in above-mentioned the embodiment of the present application one, to website STA sends indication signaling, indicates the received signal strength corresponding to each Stochastic accessing RA subchannels to refer to Show that RSSI is interval, its specific implementation procedure includes：
Step 201, according to the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels Interval, the site STA to each RA subchannel to be accessed is grouped；
In step s 201, its one RSSI interval of correspondence of each RA subchannel, according to RSSI areas Between division, site STA according to its own RSSI selection belonging to RSSI intervals be grouped, and It is distributed in corresponding RA subchannels according to respective affiliated RSSI intervals.That is, by itself RSSI It is interval interior that STA in RSSI intervals is located at the 2nd RSS as first group, by itself RSSI STA as second group, by that analogy, if there is S RSSI interval, correspond to and draw each STA It is divided into S packet.STA is grouped using RSSI, each STA can be indicated in different RA Stochastic accessing is initiated in subchannel.
Step S202, the moment of broadcast indication signaling is determined according to packet, and to all within each moment Site STA broadcasts the indication signaling, makes to be located at the interval stations of identical or different RSSI at any one time Point STA initiates Stochastic accessing；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon.
In step S202, AP determines that broadcast refers to according in step S201 based on the interval packets of RSSI Show the moment of signaling, as described in step S201, if being divided into S group, need to send S times, S It is the positive integer more than or equal to 1.Therefore, in step S202, in S groups within each moment All site STAs broadcast indication signaling, and make to be located at identical or different RSSI intervals at any one time Site STA initiates Stochastic accessing.
Wherein, in step S202, any instant makes to be located at the interval site STA initiations of different RSSI Stochastic accessing, its detailed process for example, within the first moment, makes to be located at first group and the 3rd group of RSSI One or more site STAs in interval initiate Stochastic accessing；Within the second moment, make to be located at the 5th group One or more site STAs in RSSI intervals initiate Stochastic accessing；That is, can in any instant So that difference RSSI interval website initiates Stochastic accessing.
In step S202, make to be located at the interval site STA initiations of identical RSSI at random at any one time Access, it specifically includes two ways
First, the site STA being located in RSSI intervals is initiated Stochastic accessing at the first moment, Until the S moment makes the site STA being located in the S RSSI interval initiate Stochastic accessing；
For first way, indication signaling is broadcasted to all of STA at the first moment, but now the It is first group that one moment is corresponding, then the STA being only located in first group participates in competition RA subchannel hairs Play Stochastic accessing, and so on, until the S moment make to be located at the S RSSI it is interval in site STA Initiate Stochastic accessing.
Second, the site STA in any RSSI intervals is initiated Stochastic accessing at the first moment, until The S moment makes the site STA in any RSSI intervals initiate Stochastic accessing；
For the second way, indication signaling is broadcasted to all of STA at the first moment, but now first Moment or might not deliberately correspond to first group of RSSI interval, but correspond to a RSSI in S group It is interval, the STA in RSSI intervals is participated in competition RA subchannels and initiate Stochastic accessing, so Analogize, until the S moment makes the site STA being located in any RSSI intervals initiate Stochastic accessing.
In addition, based on the step 101 in a kind of accidental access method disclosed in above-mentioned the embodiment of the present application one, Indication signaling is sent to site STA, the reception signal corresponding to each Stochastic accessing RA subchannels is indicated Intensity indicates RSSI interval, and it can also use following manner, specifically include：
Step S301, according to the received signal strength indicator corresponding to M Stochastic accessing RA subchannel RSSI is interval, according to each site STA RSSI belonging to RSSI interval determine the site STA Residing RA subchannels, and corresponding M packet is divided into, wherein, have in each RA subchannel There is K Resource Block RU；
Step S302, all site STAs in being grouped to M broadcast indication signaling, make to be located at first Site STA in group to M groups initiates Stochastic accessing in respective residing channel, and competition is each residing to be believed RU in road；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
From step S301, there is K Resource Block RU in each RA subchannel, therefore holding During row step S302, indication signaling is broadcasted using all site STAs in being grouped to M, make to be located at STA in identical group compete the group where RA subchannels on RU.Such as, make to be located in first group STA compete RU in first RA subchannel, by that analogy, make be located at M groups in STA RU is competed in m-th RA subchannels.
Based on a kind of accidental access method disclosed in above-mentioned the embodiment of the present application one, can also receive logical in AP The up RA frames that the Resource Block RU crossed in the RA subchannels that the STA passes through access sends, Itself RSSI of the STA can be carried in the RA frames；The STA that AP statistics is successfully accessed Access quantity；The AP can be according to connecing that STA in each RA subchannel for counting on is successfully accessed Enter itself RSSI of quantity and STA, adjust the RSSI interval ranges corresponding to each RA subchannel. Specific adjustment process is as follows：
Step S401, according to the correspondence STA included in each described RA frame for receiving itself RSSI sizes, to accessing the RSSI of the successfully STA from being ranked up to small greatly；
The access quantity N and the RA subchannels of step S402, the STA that acquisition is successfully accessed The ratio N/M of total number M, wherein, M and N is the positive integer more than or equal to 1；
Step S403, itself RSSI based on the STA being successfully accessed from greatly to small sequence, The minimum value in N/M maximum RSSI value is chosen as first lower bound of RA subchannels；
Step S404, the maximum chosen in N/M minimum RSSI value is believed as m-th RA The upper bound in road；
It should be noted that the access quantity based on the above-mentioned STA being successfully accessed for getting：
Step S405, when N is even number, by N/2 RSSI value and (N/2)+1 RSSI The downward round numbers of median of value, as the M/2 lower bound of RA subchannels, takes ((N/2)-(N/M) - 1) individual RSSI value is the upper bound of the M/2 RA subchannel；The median is rounded subtract 1 as (M/2)+1 upper bound of RA subchannels, takes ((N/2)+(N/M)) individual RSSI value conduct (M/2)+1 lower bound of RA subchannels；
When N is odd number, using the N/2 RSSI value as the lower bound of (M/2) individual channel, the is taken ((N/2)-(N/M) -1) individual RSSI value is the upper bound of the M/2 RA subchannel；By (N/2) + 1 RSSI value takes ((N/2)+(N/M)) as (M/2)+1 upper bound of RA subchannels Individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
Based on above-mentioned method of adjustment to the upper bound of the RSSI interval ranges corresponding to each RA subchannel and under Boundary is adjusted, if be grouped less, when such as M takes 3, is then performing step S403~step S405 During adjustment may be repeated to same RA subchannels, now, then according to step S403 With step S405 be given first RA subchannel lower bound and the 3rd upper bound and of RA subchannels Two bounds of RA subchannels.
It should be noted that above-mentioned Adjusted Option is this Shen when the access quantity that STA is successfully accessed is more Please more preferred Adjusted Option disclosed in embodiment, the embodiment of the present application can also be existing using other Adjusted Option, the embodiment of the present application is simultaneously not limited thereof.
The embodiment of the present application two selects RSSI as packet foundation, according to each by above-mentioned specific description Interval and STA itself RSSI packets of RSSI corresponding to individual RA subchannels carry out Stochastic accessing, make The STA of different RSSI initiates Stochastic accessing in different RA sub-channel resources, not only increases what is accessed Probability, reduces collision, while solving the problems, such as that STA accesses uncontrolled and access delay.
Embodiment three
As shown in figure 3, disclosed in the embodiment of the present application three a kind of flow chart of accidental access method, should Packet accidental access method is applied to STA, mainly includes：
Step S501, STA receive the indication signaling that access point AP sends, and the indication signaling is used to refer to Show that the corresponding received signal strength indicator RSSI of each Stochastic accessing RA subchannels is interval；
If it should be noted that receive AP transmission indication signaling in carry TPC parameters, When performing following accesses, STA needs to constrain its access power for accessing RA subchannels according to TPC.
Step S502, STA are according to the corresponding Stochastic accessing of the affiliated RSSI interval selections of RSSI of itself RA subchannels initiate Stochastic accessing；
In step S502, STA can according to subchannel or RU selection schemes, according to STA itself The corresponding Stochastic accessing RA subchannels of the affiliated RSSI interval selections of RSSI initiate Stochastic accessing, specially：
The first：It is interval that STA judges whether the RSSI of itself belongs to the current RSSI for allowing to access；
If it is not, then waiting subsequent time to rejudge；
If so, then STA randomly chooses a Resource Block in the interval corresponding RA subchannels of affiliated RSSI RU is accessed, or STA using the quantitative value of RU in the associated identifiers AID mould channels of itself as The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
Second：STA determines that affiliated RSSI is interval according to the RSSI of itself；
STA is taken the remainder alternatively with the quantitative value of RU in the associated identifiers AID mould channels of itself RU numberings, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
Above-mentioned each STA is taken the remainder with the quantitative value of RU in the associated identifiers AID mould channels of itself RU numberings alternatively, can reduce the probability of collision.
If it should be noted that the RSSI of STA itself is not belonging to any one correspondence RA subchannel In RSSI is interval, then the interval corresponding RA subchannels of adjacent RSSI are selected to initiate random up or down Access.
Step S503, if the RA subchannels being successfully accessed corresponding to affiliated RSSI intervals, connect to described Confirmation ACK or send up RA frames that access point AP feedbacks are successfully accessed.
Based on the packet accidental access method that STA ends are applied to disclosed in above-mentioned Fig. 3, successfully connect in STA After entering in corresponding RA subchannels, can be by the Resource Block RU in the RA subchannels of access to institute State AP and send up RA frames, itself RSSI of the STA can be carried in the RA frames, so as to The RSSI interval ranges corresponding to RA subchannels are carried out by itself RSSI of the STA in AP Adjustment.
Example IV
Connect at random based on above-mentioned the embodiment of the present application one and the disclosed packet for being applied to AP ends of embodiment two Enter method and the disclosed packet accidental access method for being applied to STA ends of the embodiment of the present application three, the application Example IV provides specific example further to packet by the interaction between AP ends and STA sections Accidental access method is described in detail：
Example one
The BSS that AP sets up, wherein there is 20 STA to be accessed.AP distributes 4 20MHz RA subchannels (M=4), in each RA subchannel acquiescence only include a RU, Fig. 4 is 20 The schematic diagram of distributions and its own RSSI of the individual STA on the BSS；
In the example one, the scope of 20 RSSI of STA is -60dBm to -83dBm.By 4 20 STA are divided into four groups by the RSSI scopes corresponding to RA subchannels.
Wherein, STAs of itself RSSI between -60dBm to -65dBm is group 1, and itself RSSI exists STA between -66dBm to -71dBm is group 2, and itself RSSI is between -72dBm to -77dBm STA is group 3, and STAs of itself RSSI between -78dBm to -83dBm is group 4.Based on above-mentioned To the packet accidental access method disclosed in the embodiment of the present application three, such as Fig. 5 is 4 to application embodiment one Moment performs the schematic diagram of following access process, and the specific access process of example one includes：
Step S11：AP broadcasts TF-R frames by STA, informs that 20 STA can currently be accessed RA subchannels RSSI scope.
Schematic diagram shown in Fig. 5, in this example one, first moment AP notifies all STA, Now the STA of (G1) group 1 (RSSI is between -60dBm to -65dBm) can initiate Stochastic accessing； All STA are notified in second moment AP, now (RSSI is in -66dBm to -71dBm for (G2) group 2 Between) STA can initiate Stochastic accessing, by that analogy, next moment continues to broadcast TF-R frames, Through all of packet all completes to access.
S12：TF-R packet moment of each STA according to corresponding to the RSSI of oneself initiates Stochastic accessing.
Each can initiate the STA of Stochastic accessing according to subchannel/RU selection schemes at the correspondence moment, respectively STA removes to select the RU in the RA subchannels in correspondence RSSI intervals.In this example a moment only have One group is removed competitive channel.Preferably, each STA is taken with the quantitative value of RU in the AID mould channels of oneself Remainder selects channel, so as to reduce collision probability.For example at the 3rd moment, the position shown in Fig. 4 It is different with the AID of STA13 in the STA12 in group 3, so same channel will not be selected, so as to keep away Exempt from collision.
S13：Each STA to AP feedback acknowledgment information ACK or sends up RA after being successfully accessed Frame, informs that AP has been successfully accessed；
S14, if AP does not receive the confirmation ACK or up of STA feedbacks in Preset Time RA frames, then illustrate that the STA is accessed not successfully, sets Backoff time, repeats S12, when retracting Between after reaffirm whether receive the STA feedback ACK.
It is a kind of in this example based on the mode of the adjustment RSSI scope bounds disclosed in above-described embodiment two, The accesss quantity of STA that AP is successfully accessed according to each RA subchannel of statistics and each STA oneself Body RSSI, adjusts the RSSI interval ranges of RA subchannels, there is 20 STA (N=20) in this example one, 4 RA subchannels (M=4), adjustment process is as follows：
Step 21：Itself RSSI of the STA being successfully accessed that will be got to small from being ranked up greatly.
The particular order of RSSI is：- 60dBm, -61dBm, -62dBm, -62dBm, -63dBm, - 64dBm, -67dBm, -68dBm, -70dBm, -72dBm, -73dBm, -74dBm, -76dBm, - 78dBm, -78dBm, -79dBm, -80dBm, -81dBm, -82dBm, -83dBm.
Step S22：The access quantity N and the RA subchannels of the STA that calculating is successfully accessed The ratio N/M=20/4=5 of total number M；
Step S23：According to above-mentioned from greatly to small order, from maximum 5 (- 60dBm, -61dBm, - 62dBm, -62dBm, -63dBm) in choose minimum value (- 63dBm) as the 1st RA letter The lower bound in road；
Step S24：According to above-mentioned from greatly to small order, from minimum 5 (- 79dBm, -80dBm, - 81dBm, -82dBm, -83dBm) in choose maximum (- 79dBm) as the 4th RA letter The upper bound in road；
Step S25：N=20 is even number, by the 10th RSSI (- 72dBm) and the 11st RSSI The median of (- 73dBm), rounds up and obtains -72dBm as the 2nd lower bound of RA subchannels, Median is rounded and is subtracted 1 and is obtained -73dBm as the 3rd upper bound of RA subchannels.
Step S26：For the 2nd lower bound of RA subchannels for determining, to big value direction number 4, take 6th RSSI (- 64dBm) is used as the 2nd upper bound of RA subchannels；For the 3rd determined The upper bound of RA subchannels, to small value direction number 4, takes the 15th RSSI (- 78dBm) as the 3rd The lower bound of individual RA subchannels.
It is as shown in table 1 below, it is that above-mentioned the application example one performs the result that RA subchannels RSSI is adjusted.
Table 1：
Example two
Based on the BSS that the AP shown in accompanying drawing 4 sets up, wherein there is 20 STA to be accessed.AP 4 RA subchannels (M=4) of 20MHz of distribution, the scope of 20 RSSI of STA is -60dBm To -83dBm.20 STA are divided into four groups by the RSSI scopes as corresponding to 4 RA subchannels.
Wherein, STAs of itself RSSI between -60dBm to -65dBm is group 1, and itself RSSI exists STA between -66dBm to -71dBm is group 2, and itself RSSI is between -72dBm to -77dBm STA is group 3, and STAs of itself RSSI between -78dBm to -83dBm is group 4.
From unlike above-mentioned example one, in the example two, multiple is marked off in a RA subchannel RU (has K RU, K=9) in each RA subchannel, therefore, TF-R can accommodate with Machine access website data will be greatly increased.
Based on above-mentioned the embodiment of the present application one to the accidental access method disclosed in the embodiment of the present application three, such as Fig. 6 is the schematic diagram for performing following access process, and the specific access process of example two includes：
S31：AP broadcasts TF-R frames by STA, informs the RA that 20 STA can currently be accessed The scope of the RSSI of subchannel.
Schematic diagram shown in Fig. 6, in this example two, AP notifies all STA, (G1) group The STA of 1 (RSSI is between -60dBm to -65dBm) competes RU in the 1st RA subchannel, (G2) STA of group 2 (RSSI is between -66dBm to -71dBm) is in the 2nd RA subchannel Competition RU, the STA of (G3) group 3 (RSSI is between -72dBm to -77dBm) is in the 3rd RA RU is competed in subchannel, the STA of (G4) group 4 (RSSI is between -78dBm to -83dBm) exists RU is competed in 4th RA subchannel.
S32：Each STA initiates Stochastic accessing according to the RSSI of oneself in corresponding RA subchannels.
Each initiates the STA of Stochastic accessing according to RU selection schemes in correspondence RA subchannels, each The RU gone in the RA subchannels of tournament selection.In this example two, each STA is with the AID moulds of oneself The quantitative value of RU in channel, takes the remainder to select channel, so as to reduce collision probability.For example at the 3rd Moment, the STA12 in group 3 shown in Fig. 4 is different with the AID of STA13, so will not Same channel is selected, so that collision free.
S33：Each STA to AP feedback acknowledgment information ACK or sends up RA after being successfully accessed Frame, informs that AP has been successfully accessed；
S34, if AP does not receive the confirmation ACK or up of STA feedbacks in Preset Time RA frames, then illustrate that the STA is accessed not successfully, sets Backoff time, repeats S32, when retracting Between after reaffirm whether receive the STA feedback ACK or up RA frames.
With above-mentioned example one, in the example two AP equally can according to each RA subchannel of statistics into The access quantity of the STA that work(is accessed and itself RSSI of each STA, adjust the RSSI of RA subchannels Interval range, its implementation procedure is consistent with example one, is not discussed here.
Embodiment five
AP ends and STA are applied to based on disclosed respectively in above-mentioned the embodiment of the present application one to embodiment three The accidental access method of section, and two examples disclosed in the embodiment of the present application four, corresponding the application Embodiment five is also corresponded to and discloses a kind of AP, a kind of STA respectively, and comprising the random of AP and STA Access system.
A kind of structural representation of AP as illustrated in FIG. 7, mainly includes：
Sends module 101, for sending indication signaling to site STA, the indication signaling is used to indicate Received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels is interval；
Treatment module 102, comes from the STA's for being successfully received in the RA subchannels Confirmation ACK, or during up RA frames, then confirm that the STA connects in the RA subchannels Enter successfully.
During indication signaling is sent to site STA, above-mentioned treatment module 102 and sends module 101 A kind of implementation procedure be：
The treatment module 102, for strong according to the reception signal corresponding to each Stochastic accessing RA subchannels Degree indicates RSSI interval, the site STA of each RA subchannel to be accessed is divided into n groups, and press The moment t of broadcast indication signaling is determined according to subregion1,t2,...tn；
Wherein, n is natural number, and n >=1, and the indication signaling includes：Stochastic accessing trigger frame TF-R Or beacon Beacon.
Sends module 101, for the moment t determined in treatment module 1021,t2,...tnStood to the n groups respectively Point STA sends the indication signaling, makes each group site STA at the different moment in corresponding RA Stochastic accessing is initiated in subchannel；Or
The indication signaling is sent to each group site STA in any instant of the determination, makes each group station Point STA initiates Stochastic accessing in the identical time in corresponding RA subchannels.
During indication signaling is sent to site STA, above-mentioned treatment module 102 and sends module 101 Another implementation procedure be：
The treatment module, for strong according to the reception signal corresponding to M Stochastic accessing RA subchannel Degree indicates RSSI interval, according to each site STA RSSI belonging to RSSI interval determine each institute The RA subchannels residing for site STA are stated, and is divided into corresponding M packet, wherein, each RA There is K Resource Block RU in subchannel；
The sends module, for broadcasting indication signaling to all site STAs in M packet, makes position Stochastic accessing is initiated in respective residing channel in the site STA in first group to M groups, competition is respective RU in residing channel；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
Further, the treatment module 102 can be also used for：
If not receiving the confirmation ACK of any STA in the RA subchannels in Preset Time Or up RA frames, then confirm access failure in the RA subchannels, the weight after Backoff time is set Newly judge whether be successfully accessed in the RA subchannels.
Further, described access point AP also includes：：
Receiving module, for receiving the resource in the RA subchannels for passing through access by the STA The RA frames that block RU sends, can carry itself RSSI of the STA in the RA frames；
The treatment module 102 is additionally operable to, the access quantity of the STA that statistics is successfully accessed；And
According to itself RSSI size of the correspondence STA included in each the described RA frame for receiving, To accessing itself RSSI of the successfully STA from being ranked up to small greatly；And
The access quantity N of the STA that acquisition is successfully accessed is with the total number M's of the RA subchannels Ratio N/M, wherein, M and N is the positive integer more than or equal to 1；And
Itself RSSI based on the STA being successfully accessed to small sequence, chooses maximum from greatly N/M RSSI value in minimum value as first lower bound of RA subchannels；For choosing minimum Maximum in N/M RSSI value as m-th RA subchannels the upper bound；And when N is even number, By the downward round numbers of median of N/2 RSSI value and (N/2)+1 RSSI value, as The M/2 lower bound of RA subchannels, takes ((N/2)-(N/M) -1) individual RSSI value for the M/2 The upper bound of individual RA subchannels；The median is rounded and subtracts 1 as (M/2)+1 RA subchannel The upper bound, takes ((N/2)+(N/M)) individual RSSI value and believes as (M/2)+1 RA The lower bound in road；And when N is odd number, using the N/2 RSSI value as under (M/2) individual channel Boundary, takes the upper bound that ((N/2)-(N/M) -1) individual RSSI value is the M/2 RA subchannel； Using (N/2)+1 RSSI value as (M/2)+1 upper bound of RA subchannels, take ((N/2) + (N/M)) individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
Based on a kind of above-mentioned AP disclosed in the present application, in actual applications can be by AP disclosed above Modules be integrated in entity, as shown in figure 8, including transmitter 1, processor 2 and receiver 3. Specifically, above-mentioned sends module can be transmitter 1, above-mentioned receiving module can be receiver 3, above-mentioned Treatment module can be processor 2, and corresponding operation is performed by processor 2, and the treatment implement body can be One central processor CPU, or specific integrated circuit ASIC, or be arranged to implement this hair One or more integrated circuits of bright embodiment.
A kind of structural representation of STA as shown in Figure 9, mainly includes：
Receiver module 201, the indication signaling for receiving access point AP transmissions, obtains the indication signaling The corresponding received signal strength indicator RSSI of indicated each Stochastic accessing RA subchannels is interval；
Processing module 202, for the affiliated RSSI interval selections of RSSI according to the site STA itself Corresponding RA subchannels initiate Stochastic accessing；
Sending module 203, if for the RA subchannels being successfully accessed corresponding to affiliated RSSI intervals, The confirmation ACK or up RA frames being successfully accessed are sent to described access point AP.
In above-mentioned processing module 202 specifically for：
Judge whether itself RSSI belongs to the current RSSI intervals for allowing and accessing, if it is not, then waiting next Moment rejudges；
If so, then randomly choosing a Resource Block RU in the interval corresponding RA subchannels of affiliated RSSI Accessed, or the RU with the quantitative value of RU in the associated identifiers AID mould channels of itself alternatively Numbering, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
Specifically it is additionally operable in above-mentioned processing module 202：
Determine that affiliated RSSI is interval according to the RSSI of the site STA itself；And
With the quantitative value of RU in the associated identifiers AID mould channels of the site STA itself, take the remainder RU numberings alternatively, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
Further, above-mentioned processing module 202 is additionally operable to：
If itself RSSI of the site STA is not belonging to the RSSI areas of any one correspondence RA subchannel It is interior, then select the interval corresponding RA subchannels of adjacent RSSI to initiate Stochastic accessing up or down.
Further, above-mentioned sending module 203 is additionally operable to：
RA frames are sent to the AP by the Resource Block RU in the RA subchannels of access, it is described Itself RSSI of the STA can be carried in RA frames.
Based on a kind of above-mentioned STA disclosed in the present application, likewise, in actual applications can be by above-mentioned public affairs Modules in the STA for opening are integrated in entity, as shown in Figure 10, including transmitter 4, processor 5 and receiver 6.Specifically, can be transmitter 1 by above-mentioned sending module, above-mentioned receiver module can be with It is receiver 6, above-mentioned processing module can be processor 5, corresponding operation is performed by processor 5.Together The treatment implement body of sample can be a central processor CPU, or specific integrated circuit ASIC, Or it is arranged to implement one or more integrated circuits of the embodiment of the present invention.
Additionally, a kind of random access system includes disclosed in the embodiment of the present application：Above-mentioned Fig. 7 or Fig. 8 STA disclosed in disclosed AP, and Fig. 9 or Figure 10, the specific of the AP and STA performs packet The process of Stochastic accessing is as described above, be not discussed here.
In sum, accidental access method disclosed in the above embodiments of the present application and relevant device, based on RSSI Used as packet foundation, the RSSI according to corresponding to each RA subchannel is interval and STA itself RSSI enter Row packet, thresholding and interval range are accessed by limiting the channel strength in each RA subchannels, optimize STA Distribution is accessed, the STA of different RSSI is initiated Stochastic accessing in different RA sub-channel resources, no Only increase the probability of access, reduce collision, while solving STA accesses asking for uncontrolled and access delay Topic.
Each embodiment is described by the way of progressive in present specification, and each embodiment is stressed Be all difference with other embodiment, identical similar portion is mutually referring to i.e. between each embodiment Can.For device disclosed in embodiment, because it is corresponded to the method disclosed in Example, so What is described is fairly simple, and related part is referring to method part illustration.With reference to reality disclosed herein The step of method or algorithm for applying example description, can directly use hardware, the software module of computing device, or The combination of both persons is implemented.Software module can be placed in random access memory (RAM), internal memory, read-only Memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, In moveable magnetic disc, CD-ROM or technical field in known any other form of storage medium.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use The present invention.Various modifications to these embodiments will be for those skilled in the art aobvious and easy See.

Claims (23)

1. a kind of accidental access method, it is characterised in that be applied to access point AP, including：
Indication signaling is sent to site STA, the reception corresponding to each Stochastic accessing RA subchannels is indicated Signal intensity indicates RSSI interval；
If be successfully received in the RA subchannels confirmation ACK for coming from the STA or During up RA frames, confirm that the STA is successfully accessed in the RA subchannels.
2. method according to claim 1, it is characterised in that if not described in Preset Time The confirmation ACK or up RA frames of any STA are received in RA subchannels, is then confirmed described Access failure in RA subchannels, judge again in the RA subchannels after Backoff time is set whether It is successfully accessed.
3. method according to claim 1, it is characterised in that described transmission to site STA indicates Signaling, indicates the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels interval, Including：
It is interval according to the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels, it is right The site STA of each RA subchannel to be accessed is grouped；
The moment of broadcast indication signaling is determined according to packet, and it is wide to all site STAs within each moment The indication signaling is broadcast, makes to be located at the interval site STA initiations of identical or different RSSI at any one time Stochastic accessing；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon.
4. method according to claim 3, it is characterised in that described to make to be located at phase at any one time Stochastic accessing is initiated with RSSI interval site STA, including：
The site STA being located in RSSI intervals is set to initiate Stochastic accessing at the first moment, until S Moment makes the site STA being located in the S RSSI interval initiate Stochastic accessing；
Or,
The site STA in any RSSI intervals is set to initiate Stochastic accessing at the first moment, until during S The site STA in any RSSI intervals is set to initiate Stochastic accessing at quarter；
Wherein, S is the positive integer more than or equal to 1.
5. method according to claim 1, it is characterised in that described transmission to site STA indicates Signaling, indicates the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels interval, Including：
It is interval according to the received signal strength indicator RSSI corresponding to M Stochastic accessing RA subchannel, press According to site STA RSSI belonging to the interval RA subchannels determined residing for the site STA of RSSI, And corresponding M packet is divided into, wherein, there is K Resource Block RU in each RA subchannel；
All site STAs in being grouped to M broadcast indication signaling, make to be located at first group to M groups Interior site STA initiates Stochastic accessing, the RU in channel residing for competition each in respective residing channel；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
6. the method according to any one in Claims 1 to 4, it is characterised in that also include：
Receive the RA that the Resource Block RU in the RA subchannels for passing through access by the STA sends Frame, can carry the RSSI of the STA in the RA frames；
The access quantity of the STA that statistics is successfully accessed；
According to itself RSSI size of the correspondence STA included in each the described RA frame for receiving, To accessing the RSSI of the successfully STA from being ranked up to small greatly；
The access quantity N of the STA that acquisition is successfully accessed is with the total number M's of the RA subchannels Ratio N/M, wherein, M and N is the positive integer more than or equal to 1；
RSSI based on the STA being successfully accessed is from greatly to small sequence, the maximum N/M of selection Minimum value in individual RSSI value is used as first lower bound of RA subchannels；
Choose the upper bound of the maximum in N/M minimum RSSI value as m-th RA subchannels；
When N is even number, by N/2 RSSI value and (N/2)+1 median of RSSI value Downward round numbers, as the M/2 lower bound of RA subchannels, takes ((N/2)-(N/M) -1) individual RSSI value is the upper bound of the M/2 RA subchannel；The median is rounded and subtracts 1 as (M/2)+1 upper bound of RA subchannels, takes ((N/2)+(N/M)) individual RSSI value as institute State (M/2)+1 lower bound of RA subchannels；
When N is odd number, using the N/2 RSSI value as the lower bound of (M/2) individual channel, the is taken ((N/2)-(N/M) -1) individual RSSI value is the upper bound of the M/2 RA subchannel；By (N/2) + 1 RSSI value takes ((N/2)+(N/M)) as (M/2)+1 upper bound of RA subchannels Individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
7. a kind of access point AP, it is characterised in that including：
Sends module is used for, and indication signaling is sent to site STA, and the indication signaling is used to indicate each Received signal strength indicator RSSI corresponding to Stochastic accessing RA subchannels is interval；
Treatment module is used for, and the confirmation for coming from the STA is successfully received in the RA subchannels When information ACK or up RA frames, confirm that the STA is successfully accessed in the RA subchannels.
8. access point AP according to claim 7, it is characterised in that the treatment module may be used also For：
If not receiving the confirmation ACK of any STA in the RA subchannels in Preset Time Or up RA frames, then confirm access failure in the RA subchannels, the weight after Backoff time is set Newly judge whether be successfully accessed in the RA subchannels.
9. access point AP according to claim 7, it is characterised in that the treatment module is used for, It is interval according to the received signal strength indicator RSSI corresponding to each Stochastic accessing RA subchannels, will be waiting The site STA for entering each RA subchannel is divided into n groups, and determines broadcast indication signaling according to packet Moment t1,t2,...tn；
Wherein, n is natural number, and n >=1, and the indication signaling includes：Stochastic accessing trigger frame TF-R Or beacon Beacon.
10. access point AP according to claim 9, it is characterised in that the sends module is used for： In the moment t of the determination1,t2,...tnThe indication signaling is sent to the n groups site STA respectively, makes institute State each group site STA and initiate Stochastic accessing in corresponding RA subchannels at the different moment；Or
The indication signaling is sent to each group site STA in any instant of the determination, makes each group station Point STA initiates Stochastic accessing in the identical time in corresponding RA subchannels.
11. access point AP according to claim 7, it is characterised in that
The treatment module is used for, strong according to the reception signal corresponding to M Stochastic accessing RA subchannel Degree indicates RSSI interval, according to site STA RSSI belonging to RSSI interval determine the site STA Residing RA subchannels, and corresponding M packet is divided into, wherein, have in each RA subchannel There is K Resource Block RU；
The sends module is used for, and all site STAs in being grouped to M broadcast indication signaling, make position Stochastic accessing is initiated in respective residing channel in the site STA in first group to M groups, competition is respective RU in residing channel；
Wherein, the indication signaling includes：Stochastic accessing trigger frame TF-R or beacon Beacon, M and K It is the positive integer more than or equal to 1.
The 12. access point AP according to any one in claim 7~11, it is characterised in that also Including：
Receiving module is used for, and receives the resource in the RA subchannels for passing through access by the STA The RA frames that block RU sends, can carry itself RSSI of the STA in the RA frames；
The treatment module is additionally operable to, the access quantity of the STA that statistics is successfully accessed；
According to itself RSSI size of the correspondence STA included in each the described RA frame for receiving, To accessing itself RSSI of the successfully STA from being ranked up to small greatly；
The access quantity N of the STA that acquisition is successfully accessed is with the total number M's of the RA subchannels Ratio N/M, wherein, M and N is the positive integer more than or equal to 1；
Itself RSSI based on the STA being successfully accessed to small sequence, chooses maximum from greatly N/M RSSI value in minimum value as first lower bound of RA subchannels；For choosing minimum Maximum in N/M RSSI value as m-th RA subchannels the upper bound；And when N is even number, By the downward round numbers of median of N/2 RSSI value and (N/2)+1 RSSI value, as The M/2 lower bound of RA subchannels, takes ((N/2)-(N/M) -1) individual RSSI value for the M/2 The upper bound of individual RA subchannels；The median is rounded and subtracts 1 as (M/2)+1 RA subchannel The upper bound, takes ((N/2)+(N/M)) individual RSSI value and believes as (M/2)+1 RA The lower bound in road；And when N is odd number, using the N/2 RSSI value as under (M/2) individual channel Boundary, takes the upper bound that ((N/2)-(N/M) -1) individual RSSI value is the M/2 RA subchannel； Using (N/2)+1 RSSI value as (M/2)+1 upper bound of RA subchannels, take ((N/2) + (N/M)) individual RSSI value is used as (M/2)+1 lower bound of RA subchannels.
13. a kind of packet accidental access methods, it is characterised in that be applied to site STA, including：
The indication signaling that access point AP sends is received, the indication signaling is used to indicate each Stochastic accessing The corresponding received signal strength indicator RSSI of RA subchannels is interval；
The corresponding Stochastic accessing RA letters of the affiliated RSSI interval selections of RSSI according to the site STA Initiate Stochastic accessing in road；
If being successfully accessed the corresponding RA subchannels, it is successfully accessed to described access point AP feedbacks Confirmation ACK sends up RA frames.
14. methods according to claim 13, it is characterised in that described according to the site STA The corresponding RA subchannels of the affiliated RSSI interval selections of RSSI initiate Stochastic accessing, including：
Judge whether the RSSI of the site STA belongs to the current RSSI intervals for allowing and accessing, if it is not, Subsequent time is then waited to rejudge；
If so, then randomly choosing a Resource Block RU in the interval corresponding RA subchannels of affiliated RSSI Accessed, or using the quantitative value of RU in the associated identifiers AID mould channels of the site STA as The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
15. methods according to claim 13, it is characterised in that described according to the site STA The corresponding RA subchannels of the affiliated RSSI interval selections of RSSI initiate Stochastic accessing, including：
Determine that affiliated RSSI is interval according to the RSSI of the site STA；
With the quantitative value of RU in the associated identifiers AID mould channels of the site STA, conduct is taken the remainder The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
16. method according to any one in claim 13~15, it is characterised in that also include：
If the RSSI that the RSSI of the site STA is not belonging to any one correspondence RA subchannel is interval interior, The interval corresponding RA subchannels of adjacent RSSI are then selected to initiate Stochastic accessing up or down.
17. method according to any one in claim 13~15, it is characterised in that it is described to Described access point AP sends up RA frames, including：
Up RA frames are sent to the AP by the Resource Block RU in the RA subchannels of access, Itself RSSI of the STA can be carried in the RA frames.
A kind of 18. site STAs, it is characterised in that including：
Receiver module is used for, and receives the indication signaling that access point AP sends, and obtains the indication signaling signified The corresponding received signal strength indicator RSSI of each Stochastic accessing RA subchannels for showing is interval；
Processing module is used for, according to the affiliated RSSI interval selections of the RSSI of the site STA it is corresponding with Machine accesses RA subchannels and initiates Stochastic accessing；
Sending module is used for, if the RA subchannels being successfully accessed corresponding to affiliated RSSI interval, to connecing Access point AP sends the confirmation ACK or the up RA frames of transmission being successfully accessed.
19. site STA according to right 18, it is characterised in that
The processing module is additionally operable to：
Judge whether itself RSSI belongs to the current RSSI intervals for allowing and accessing, if it is not, then waiting next Moment rejudges；
If so, then randomly choosing a Resource Block RU in the interval corresponding RA subchannels of affiliated RSSI Accessed, or the RU with the quantitative value of RU in the associated identifiers AID mould channels of itself alternatively Numbering, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
20. site STAs according to claim 18, it is characterised in that the processing module is also used In：
Determine that affiliated RSSI is interval according to the RSSI of the site STA；And
With the quantitative value of RU in the associated identifiers AID mould channels of the site STA, conduct is taken the remainder The RU numberings of selection, the Resource Block RU in the interval corresponding RA subchannels of RSSI belonging to selection.
21. site STA according to any one in claim 18~20, it is characterised in that institute Processing module is stated to be additionally operable to：
If the RSSI that the RSSI of the site STA is not belonging to any one correspondence RA subchannel is interval interior, The interval corresponding RA subchannels of adjacent RSSI are then selected to initiate Stochastic accessing up or down.
22. site STA according to any one in claim 18~20, it is characterised in that institute Stating sending module is used for, and is sent to the AP by the Resource Block RU in the RA subchannels of access Up RA frames, can carry the RSSI of the STA in the RA frames.
A kind of 23. random access systems, it is characterised in that including：Any one in claim 7~12 Site STA in described access point AP and claim 18~22 described in any one.
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