CN103249166A - Method and device and system for starting RTS/CTS mechanism - Google Patents
Method and device and system for starting RTS/CTS mechanism Download PDFInfo
- Publication number
- CN103249166A CN103249166A CN201210022246XA CN201210022246A CN103249166A CN 103249166 A CN103249166 A CN 103249166A CN 201210022246X A CN201210022246X A CN 201210022246XA CN 201210022246 A CN201210022246 A CN 201210022246A CN 103249166 A CN103249166 A CN 103249166A
- Authority
- CN
- China
- Prior art keywords
- transmitting terminal
- sta
- terminal information
- information
- controlled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a method for starting an RTS/CTS mechanism, which comprises the following steps: an AC (AP (Access Point) Controller) receives transmitting terminal information reported by APs in the self district; the AC detects whether hidden nodes exist between APs or not according to the transmitting terminal information reported by the APs; the AC determines STAs (Station) influenced by the hidden nodes according to the transmitting terminal information reported by APs between which the hidden nodes exist, so as to generate controlled information and issue the controlled information to the APs related with the STA; and the APs receive the controlled information, and start the RTS/CTS mechanism when sending data to the STAs according to the controlled information. Accordingly, the invention further discloses a device and system for starting the RTS/CTS mechanism. The method, the device and the system reduce the interference caused by the hidden nodes existing between the APs in the system, the RTS/CTS mechanism is not abused, and the air interface utilization rate and the system access capability are improved.
Description
Technical field
The present invention relates to wireless access technology, relate in particular to the machine-processed startup method of a kind of request transmission/permission transmission (RTS/CTS, Request To Send/Clear To Send) and device, system.
Background technology
Wireless local area network technology is a kind of wireless access technology of present extensive use, and this technology utilizes wireless signal to transmit user profile.
WLAN (wireless local area network) is followed IEEE 802.11 serial protocols, avoids the operation of (CSMA/CA) mechanism according to the carrier sense conflict.CSMA/CA mechanism is supported is a kind of simple distribution formula, based on the access protocol of competition, communication entity is in the position of equity in this mechanism, communication entity shared channel in the common overlay area, arbitrarily communication entity all needs to carry out carrier sense before sending data, just can send data wait for some cycles according to the agreement regulation after listening to channel idle after.On wireless medium, not that each website can both " be heard " website that other are all.Some websites may be able to " be heard " website at exchanges data one end, and can not " hear " website of far-end, and this has just caused hidden node problem.Hidden node problem can produce two concealed nodes, sends data because detect mutually simultaneously less than the other side, causes at receiver side to take place owing to data collision causes the problem that can't normally receive.
IEEE 802.11 has founded RTS/CTS mechanism for solving hidden node problem.Send website and send (RTS by sending request before sending in data, Request to Send) message request channel, receiving terminal is by sending clear to send (CTS, Clear to Send) message empties transit area, because the RTS/CTS data packet length is very short, so the possibility that influenced by concealed nodes is very little, promoted the transmission robustness of data by RTS/CTS mechanism.Because RTS/CTS mechanism itself can take certain interface-free resources; in actual applications; in order to promote the utilance of eating dishes without rice or wine; access point (AP; a threshold values can be set Access Point) usually; when the data packet length that transmits is higher than this threshold values, before frame sends, adopt RTS/CTS mechanism, when the data packet length that transmits is lower than this threshold values, do not adopt RTS/CTS mechanism.Obviously, this machine-processed principle is to be subjected to concealed nodes to influence possibility according to short data to be lower than the long data formulation, and this machine-processed problem is not consider whether have concealed nodes in the actual conditions; The RTS/CTS that additionally provides for long data in not having the environment of concealed nodes mechanism is also meaningless, and in the environment of concealed nodes is arranged to the protection mechanism deficiency of short data.
Along with increasing of WLAN devices, the probability that concealed nodes occurs increases, and user's business experience is brought harmful effect.The interference that brings owing to hidden node problem between the AP in the wireless local area network (WLAN) system makes AP repeat to send the probability increase of data, thereby causes the efficient of eating dishes without rice or wine low that throughput of system descends.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of startup method of RTS/CTS mechanism and device, system, reduces between the AP that brings owing to hidden node problem in the wireless local area network (WLAN) system and disturbs, with lifting eat dishes without rice or wine efficient and throughput of system.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of the request and send/allow the startup method that sends RTS/CTS mechanism, described method comprises:
The transmitting terminal information that local each AP of access point AP controller AC reception self reports;
Whether the transmitting terminal information that AC reports according to described each AP, detection have exists the concealed nodes relation between the AP;
AC is according to the transmitting terminal information that the AP that has concealed nodes relation reports, and determines the regulated station STA that influenced by concealed nodes, generates controlled information and is handed down to the AP of described controlled STA association;
Described AP receives described controlled information, and according to described controlled information, is starting RTS/CTS mechanism when described controlled STA sends data.
In such scheme, before the transmitting terminal information that local each AP of described AC reception self reports, described method also comprises:
Each local AP of described AC carries out following action respectively: each blank-interface text that receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting reported described AC, described transmitting terminal information comprise blank-interface text transmitting terminal MAC Address and and described AP between incidence relation information.
In such scheme, the transmitting terminal information that described AC reports according to described each AP, whether detection has exists the concealed nodes relation between the AP, comprising:
Described AC resolves all transmitting terminal information that each AP reports, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge and do not have concealed nodes relation between described two AP: all do not comprise the other side's MAC Address in all transmitting terminal information that two AP report, and a transmitting terminal information reporting of a transmitting terminal information reporting of one of them AP and another AP comprises the MAC Address of same STA.
In such scheme, described AC is according to the transmitting terminal information that the AP that has concealed nodes relation reports, and determines the regulated station STA that influenced by concealed nodes to generate controlled information, comprising:
Described AC resolves all transmitting terminal information that the AP of concealed nodes each other reports, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that then described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
It is a kind of for the AC that starts RTS/CTS mechanism that the present invention also provides, and described AC comprises: first receiving element, detecting unit, generation unit and transmitting element, wherein,
First receiving element is used for receiving the transmitting terminal information that local each AP of AC self reports;
Detecting unit, for the transmitting terminal information that receives according to described first receiving element, whether detection has exists the concealed nodes relation between the AP;
Generation unit is used for the testing result according to described detecting unit, to the transmitting terminal information that the AP that has the concealed nodes relation reports, determines the controlled STA that influenced by concealed nodes to generate controlled information;
Transmitting element is used for the controlled information that described generation unit generates is handed down to the AP of described controlled STA association.
In such scheme, described detecting unit specifically is used for: all transmitting terminal information that described first receiving element receives are resolved, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge and do not have concealed nodes relation between described two AP: all do not comprise the other side's MAC Address in all transmitting terminal information that two AP report, and a transmitting terminal information reporting of a transmitting terminal information reporting of one of them AP and another AP comprises the MAC Address of same STA.
In such scheme, described generation unit specifically is used for: all transmitting terminal information that the AP of concealed nodes each other reports are resolved, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that then described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
It is a kind of for the AP that starts RTS/CTS mechanism that the present invention also provides, and described AP comprises: second receiving element and start unit, wherein,
Second receiving element is used for receiving the controlled information that AC issues;
Start unit is used for the controlled information according to described second receiving element reception, is starting RTS/CTS mechanism when controlled STA sends data.
In such scheme, described second receiving element also is used for receiving blank-interface text;
Described AP also comprises: report the unit, be used for each blank-interface text that described second receiving element receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting is reported described AC.
It is a kind of for the system that starts RTS/CTS mechanism that the present invention also provides, and described system comprises: claim 5 to 7 each described AC and at least one claim 8 or 9 described AP for startup RTS/CTS mechanism for startup RTS/CTS mechanism.
In such scheme, described system also comprises: at least one STA is used at least one described for the AP transmission blank-interface text that starts RTS/CTS mechanism.
The startup method of RTS/CTS mechanism of the present invention and device, system, the STA that detects the interior concealed nodes of wireless network and influenced by concealed nodes, open RTS/CTS mechanism when only influenced STA being carried out transfer of data, avoided in the traditional method blindness according to data packet length On/Off RTS/CTS mechanism, reduced AP between system because the interference that hidden node problem causes, do not abuse RTS/CTS mechanism again, and promoted eat dishes without rice or wine utilance and system's access capability by the means of disturbing in the reduction system.
Use the present invention, can on existing AP/AC framework basis, the mode by software upgrading provide support, AP/AC hardware is not proposed special requirement, be easy to realize; And the method that the present invention describes is followed IEEE 802.11 serial protocols fully, does not need agreement is expanded, and has good compatibility.In addition, also help and promote user's experience, set up the high performance radio local area network network.
Description of drawings
Fig. 1 is the realization flow figure of the startup method of RTS/CTS mechanism of the present invention;
Fig. 2 is the concealed nodes scene schematic diagram of the embodiment of the invention one;
Fig. 3 is the non-concealed nodes scene schematic diagram of the embodiment of the invention one;
Fig. 4 is for enabling the realization flow figure of RTS/CTS mechanism under the scene shown in Figure 2.
Embodiment
Basic thought of the present invention is: detect the concealed nodes relation between each AP, having detected when existing concealed nodes to concern between the AP, enable RTS/CTS mechanism, logarithm reportedly send provides protection.
The startup method of a kind of RTS/CTS mechanism of the present invention mainly can comprise the steps:
Step 101:AP controller (AC, AP Controller) receives the transmitting terminal information that self local each AP reports;
In the practical application, the start-up system of RTS/CTS mechanism can comprise AP, AC and three kinds of communication entities of STA.STA passes through the air interface interactive information as user terminal with AP, and this air interface meets IEEE 802.11 series of canonical; AP inserts upper layer network by physical link; AC is as the control platform, and AP and AC route can reach and can interactive media/control information.Preserve the AP tabulation on the AC, indicate each AP of described AC administration in this AP tabulation with MAC Address.
According to the working mechanism of IEEE 802.11 definition, AP follows CSMA/CA mechanism and be in receiving mode all the time before sending data; Under this pattern, AP continues to intercept blank-interface text, as receives IEEE 802.11 aerial messages and then handle.The source address that includes transmitting terminal in this aerial message, this source address are 48 global unique mac address, can be used for the unique identifying information as transmitting terminal.In the practical application, the transmitting terminal of the blank-interface text that AP is received can be the STA in other AP, the described AP coverage etc.According to IEEE 802.11 definition, also include the type information of transmitting terminal in the described aerial message, can judge transmitting terminal based on the type information is AP or STA.
According to IEEE 802.11 definition, STA with the AP normal communication before need to set up incidence relation with AP, AP and STA set up or the cancellation incidence relation with AP by the mutual of management frames; In case the incidence relation of AP and STA is set up, AP can distribute the indications of a called after AID (Association Identifier) to give STA and AID is notified to STA by management frames; For the STA that is associated with AP, AP can guarantee that this STA is whether still in its coverage by the method for regular transmission explore frame.
Here, each local AP of described AC carries out following action respectively: each blank-interface text that receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting reported described AC, described transmitting terminal information can comprise type information as the transmitting terminal of described blank-interface text, MAC Address and and described AP between incidence relation information.
Whether the transmitting terminal information that step 102:AC reports according to described each AP detects to have among described each AP and has concealed nodes relation between the AP;
In the practical application, if two AP can not receive the blank-interface text of mutual transmission, then two AP can not avoid sending simultaneously data by the CSMA/CA mechanism coordination; If two AP can receive the blank-interface text of same STA, then this STA might receive the blank-interface text that two AP send simultaneously, the blank-interface text that this moment, two AP sent may bump at the STA place and cause STA can't parse any one blank-interface text, two AP concealed nodes each other in this case, and STA is in the repetition overlay area of two concealed nodes, influenced by concealed nodes.Therefore, when satisfying following condition, judge to have the relation of hiding between two AP: whether can receive the blank-interface text of the other side's transmission and the blank-interface text whether described two AP can receive same STA between two AP.
Particularly, AC resolves all transmitting terminal information that each AP reports, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge not have concealed nodes relation between described two AP: the MAC Address that does not all comprise the other side in all transmitting terminal information that two AP report; The transmitting terminal information that the transmitting terminal information that one of them AP reports and another AP report comprises the MAC Address of same STA.
Step 103: detecting when existing concealed nodes to concern between the AP, the transmitting terminal information that AC reports according to the AP that has the concealed nodes relation, determine the regulated station (STA that influenced by concealed nodes, Station), generate controlled information, and described controlled information is handed down to the AP of described controlled STA association;
Here, if two of concealed nodes AP can receive the blank-interface text of same STA each other, this STA is related with one of them AP, with another AP dereferenced, and with the AP load of described STA dereferenced for empty (be this AP with other arbitrarily STA set up incidence relation, no matter whether other STA are in the repetition overlay area of this two AP), then AC determines that described STA is the controlled STA that influenced by concealed nodes, and generates the controlled information that is used to indicate controlled STA.
Particularly, described AC resolves all transmitting terminal information that the AP of concealed nodes each other reports, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
Step 104: the AP of described controlled STA association receives described controlled information, and according to described controlled information, is starting RTS/CTS mechanism when described controlled STA sends data.
Here, AP enables RTS/CTS mechanism when controlled STA sends data, do not start RTS/CTS mechanism when uncontrolled STA sends data, sends data according to normal mechanism.
Particularly; when sending data; AP judges that the MAC Address of the STA that receives data is consistent with the MAC Address of described controlled STA; then be judged to be to controlled STA and send data; start RTS/CTS mechanism; the MAC Address of the STA of judgement reception data and the MAC Address of described controlled STA are inconsistent, then are judged to be to uncontrolled STA and send data, send data according to normal mechanism.
During practical application, AP can also set up a controlled tabulation according to the controlled information that receives, and comprises the MAC Address of all controlled STA in this controlled tabulation.Send before the data; AP at first inquires about the controlled tabulation of self; if receiving the STA MAC Address of described data is included in the described controlled tabulation; then described STA is controlled STA; AP is enabling RTS/CTS mechanism when described STA sends data, if the MAC Address of STA is not included in the described controlled tabulation, then described STA is uncontrolled STA; AP does not start RTS/CTS mechanism when described STA sends data, send data according to normal mechanism.
Accordingly, it is a kind of for the AC that starts RTS/CTS mechanism that the present invention also provides, and described AC comprises: first receiving element, detecting unit, generation unit and transmitting element, wherein,
First receiving element is used for receiving the transmitting terminal information that local each AP of AC self reports;
Detecting unit, for the transmitting terminal information that receives according to described first receiving element, whether detection has exists the concealed nodes relation between the AP;
Generation unit is used for the testing result according to described detecting unit, to the transmitting terminal information that the AP that has the concealed nodes relation reports, determines the controlled STA that influenced by concealed nodes to generate controlled information;
Transmitting element is used for the controlled information that described generation unit generates is handed down to the AP of described controlled STA association.
Here, described detecting unit specifically is used for: all transmitting terminal information that described first receiving element receives are resolved, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge and do not have concealed nodes relation between described two AP: all do not comprise the other side's MAC Address in all transmitting terminal information that two AP report, and a transmitting terminal information reporting of a transmitting terminal information reporting of one of them AP and another AP comprises the MAC Address of same STA.
Here, described generation unit specifically is used for: all transmitting terminal information that the AP of concealed nodes each other reports are resolved, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that then described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
It is a kind of for the AP that starts RTS/CTS mechanism that the present invention also provides, and described AP comprises: second receiving element and start unit, and wherein, second receiving element is used for receiving the controlled information that AC issues; Start unit is used for the controlled information according to described second receiving element reception, is starting RTS/CTS mechanism when controlled STA sends data.
Here, described second receiving element also is used for receiving blank-interface text; Described AP also comprises: report the unit, be used for each blank-interface text that described second receiving element receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting is reported described AC.
It is a kind of for the system that starts RTS/CTS mechanism that the present invention also provides, and described system comprises: above-mentioned above-mentioned for the AP that starts RTS/CTS mechanism for the AC that starts RTS/CTS mechanism and at least one.
Here, described system also comprises: at least one STA is used at least one above-mentioned for the AP transmission blank-interface text that starts RTS/CTS mechanism.
Embodiment one
Fig. 2 and Fig. 3 are respectively the scene schematic diagram of concealed nodes and non-concealed nodes.
In Fig. 2, STA_1 is associated on the AP_1, STA_2 is associated on the AP_2, STA_2 is in the overlay area of AP_1 and AP_2, AP_1 and AP_2 be not mutually in the other side's overlay area, AP_1 can't listen to the signal that AP_2 sends, and AP_2 also can't listen to the signal that AP_1 sends, and can not avoid sending simultaneously data by CSMA/CA mechanism between AP_1 and the AP_2.
For scene shown in Figure 2, if AP_2 sends data to STA_2 when AP_1 transmits data to give STA_1, to bump at the STA_2 place owing to the data that AP_1 and AP_2 send simultaneously causes STA_2 can't receive the data that normal reception AP_2 sends, and constitutes concealed nodes between AP_1 and the AP_2.According to the agreement of IEEE 802.11 regulation, when STA_2 can't receive the data that normal reception AP_2 sends, also just can not reply ACK message and confirm to AP_2, AP_2 can resend data to STA_2 under the situation of the overtime ACK of not receiving message.Like this, because the interference that the formation concealed nodes brings between AP_1 and the AP_2 has caused the transmission that repeats of data, can reduce the efficient of eating dishes without rice or wine, reduce the throughput of system.Therefore, must be protected the data that AP_2 sends to STA_2 by RTS/CTS mechanism for this scene, be occurred the probability of interference in the reduction system, could make STA_2 can successfully receive the data that AP_2 sends, avoid data to repeat to send.
In Fig. 3; STA_1 is associated on the AP_1; STA_2 is associated on the AP_2; STA_2 is in the overlay area of AP_1 and AP_2; AP_1 and AP_2 are respectively in the other side's overlay area; both sides can detect the data that the other side sends mutually, can send data by the CSMA/CA mechanism coordination between AP_1 and the AP_2, do not need by RTS/CTS mechanism the transmission of data to be protected.
The scene of describing with Fig. 2 is example below, and specific implementation process of the present invention is elaborated.
As shown in Figure 4, for scene shown in Figure 2, the flow process that starts RTS/CTS mechanism can comprise the steps:
Here, described transmitting terminal information can comprise type information as the transmitting terminal of described blank-interface text, MAC Address and and AP between incidence relation information.
In the present embodiment, comprise STA_1 and STA_2 in the AP_1 coverage, AP_1 receives the blank-interface text from STA_1 and STA_2, extracts the first transmitting terminal information and the second transmitting terminal information respectively and send to AC from described blank-interface text.Here, the first transmitting terminal information comprises: the STA pattern information of expression STA_1 type, the MAC Address MAC_1 of STA_1 and expression STA_1 set up related incidence relation information with AP_1; The second transmitting terminal information comprises: the STA pattern information of expression STA_2 type, the MAC Address MAC_2 of STA_2 and expression STA_2 do not set up related incidence relation information with AP_1.
Only comprise STA_2 in the AP_2 coverage, AP_2 receives the blank-interface text from STA_2, extracts the 3rd transmitting terminal information and send to AC from described blank-interface text.Here, the 3rd transmitting terminal information comprises: the STA pattern information of expression STA_2 type, the MAC Address MAC_2 of STA_2 and expression STA_2 set up related incidence relation information with AP_2.
For scene shown in Figure 2, AP_1 does not send blank-interface text to AP_2, and AP_2 does not send blank-interface text to AP_1 yet.
Particularly, all transmitting terminal information that the AP_1 of AC and AP_2 report are resolved, if satisfy following two conditions, then judge to be the concealed nodes relation between AP_1 and the AP_2:
(1) all do not comprise the other side's MAC Address in all transmitting terminal information that AP_1 and AP_2 report;
(2) the transmitting terminal information that has transmitting terminal information and AP_2 to report in all transmitting terminal information that AP_1 reports comprises the MAC Address of same STA.
In the present embodiment, all transmitting terminal information that the AP_1 of AC and AP_2 report are resolved, the 3rd transmitting terminal information that obtains the first transmitting terminal information that AP_1 reports and the second transmitting terminal information, reports with AP_2 satisfies above-mentioned condition (1), and the 3rd transmitting terminal information that the second transmitting terminal information that AP_1 reports and AP_2 report satisfies above-mentioned condition (2), therefore, AC judges between AP_1 and the AP_2 to be that concealed nodes concerns.
Step 303:AC determines controlled STA according to the transmitting terminal information that AP_1 and AP_2 report, and generates controlled information, and described controlled information is handed down to the AP related with controlled STA;
Particularly, at first because the second transmitting terminal information that reports of AP_1, the 3rd transmitting terminal information that reports with AP_2 all comprise the MAC Address of STA_2, therefore, AC determines that STA_2 is controlled STA; Secondly, do not set up related incidence relation information with AP_1 owing to comprise expression STA_2 in the second transmitting terminal information that AP_1 reports, comprise expression STA_2 in the 3rd transmitting terminal information that AP_2 reports and set up related incidence relation information with AP_2, therefore, AC determines that STA_2 is associated with AP_2, with the AP_1 dereferenced; At last, set up related incidence relation information with AP_1 owing to comprise expression STA_1 in the second transmitting terminal information that AP_1 reports, therefore, AC determines that the AP_1 load is not for empty, based on above determined factor, AC generates the controlled information of expression " STA_2 of AP_2 association is controlled STA ", and this controlled information is sent to AP_2.
Here, can also comprise the MAC Address of AP_2 and/or the MAC Address of STA_2 in the described controlled information.In the practical application, AC can send described controlled information based on the MAC Address of AP_2 in the described controlled information, also can be from the AP of self-management tabulation the MAC Address of inquiry AP_2, and send described controlled information based on the MAC Address of the AP_2 that inquires.
Here, AP_2 can enable RTS/CTS mechanism based on the MAC Address of STA_2 in the described controlled information when STA_2 sends data.Perhaps; AP_2 can be according to the indication of described controlled information; the MAC Address of inquiry STA_2 from the STA tabulation of self-management; and based on the MAC Address of the STA_2 that inquires; when STA_2 sends data, enabling RTS/CTS mechanism, thus by RTS/CTS mechanism to sending to the DEP of STA_2.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (11)
1. ask to send/allow the startup method that sends RTS/CTS mechanism for one kind, it is characterized in that described method comprises:
The transmitting terminal information that local each AP of access point AP controller AC reception self reports;
Whether the transmitting terminal information that AC reports according to described each AP, detection have exists the concealed nodes relation between the AP;
AC is according to the transmitting terminal information that the AP that has concealed nodes relation reports, and determines the regulated station STA that influenced by concealed nodes, generates controlled information and is handed down to the AP of described controlled STA association;
Described AP receives described controlled information, and according to described controlled information, is starting RTS/CTS mechanism when described controlled STA sends data.
2. according to the startup method of the described RTS/CTS mechanism of claim 1, it is characterized in that before the transmitting terminal information that local each AP of described AC reception self reports, described method also comprises:
Each local AP of described AC carries out following action respectively: each blank-interface text that receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting reported described AC, described transmitting terminal information comprise blank-interface text transmitting terminal MAC Address and and described AP between incidence relation information.
3. according to the startup method of claim 1 or 2 described RTS/CTS mechanism, it is characterized in that, the transmitting terminal information that described AC reports according to described each AP, whether detection has exists the concealed nodes relation between the AP, comprising:
Described AC resolves all transmitting terminal information that each AP reports, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge and do not have concealed nodes relation between described two AP: all do not comprise the other side's MAC Address in all transmitting terminal information that two AP report, and a transmitting terminal information reporting of a transmitting terminal information reporting of one of them AP and another AP comprises the MAC Address of same STA.
4. according to the startup method of claim 1 or 3 described RTS/CTS mechanism, it is characterized in that described AC is according to the transmitting terminal information that the AP that has concealed nodes relation reports, determine the regulated station STA that influenced by concealed nodes to generate controlled information, comprising:
Described AC resolves all transmitting terminal information that the AP of concealed nodes each other reports, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that then described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
5. AC who be used for to start RTS/CTS mechanism is characterized in that described AC comprises: first receiving element, detecting unit, generation unit and transmitting element, wherein,
First receiving element is used for receiving the transmitting terminal information that local each AP of AC self reports;
Detecting unit, for the transmitting terminal information that receives according to described first receiving element, whether detection has exists the concealed nodes relation between the AP;
Generation unit is used for the testing result according to described detecting unit, to the transmitting terminal information that the AP that has the concealed nodes relation reports, determines the controlled STA that influenced by concealed nodes to generate controlled information;
Transmitting element is used for the controlled information that described generation unit generates is handed down to the AP of described controlled STA association.
6. described for the AC that starts RTS/CTS mechanism according to claim 5, it is characterized in that, described detecting unit specifically is used for: all transmitting terminal information that described first receiving element receives are resolved, if all transmitting terminal information that any two AP report satisfy following condition, then judge and be the concealed nodes relation between described two AP, otherwise, judge and do not have concealed nodes relation between described two AP: all do not comprise the other side's MAC Address in all transmitting terminal information that two AP report, and a transmitting terminal information reporting of a transmitting terminal information reporting of one of them AP and another AP comprises the MAC Address of same STA.
7. according to claim 5 or 6 described AC for startup RTS/CTS mechanism, it is characterized in that described generation unit specifically is used for:
All transmitting terminal information that the AP of concealed nodes each other reports are resolved, based on following condition, determine controlled STA, generate controlled information: a transmitting terminal information reporting of the transmitting terminal information that AP reports among the AP of concealed nodes and another AP comprises the MAC Address of same STA each other, there is transmitting terminal information to comprise described STA and AP self in the transmitting terminal information that AP reports and set up related incidence relation information, there is transmitting terminal information to comprise described STA and AP in the transmitting terminal information that another AP reports and self do not set up related incidence relation information, and other STA and AP self that have transmitting terminal information to comprise except described STA have set up related incidence relation information, determine that then described STA is controlled STA, generating and being used to indicate described STA is controlled STA, and the controlled information of the AP of related described STA.
8. AP who be used for to start RTS/CTS mechanism is characterized in that described AP comprises: second receiving element and start unit, wherein,
Second receiving element is used for receiving the controlled information that AC issues;
Start unit is used for the controlled information according to described second receiving element reception, is starting RTS/CTS mechanism when controlled STA sends data.
9. describedly according to Claim 8 it is characterized in that for the AP that starts RTS/CTS mechanism described second receiving element also is used for receiving blank-interface text;
Described AP also comprises: report the unit, be used for each blank-interface text that described second receiving element receives is resolved, extract the transmitting terminal information of each blank-interface text, and the transmitting terminal information of extracting is reported described AC.
10. a system that is used for starting RTS/CTS mechanism is characterized in that described system comprises: claim 5 to 7 each described AC and at least one claim 8 or 9 described AP for startup RTS/CTS mechanism for startup RTS/CTS mechanism.
11. described for the system that starts RTS/CTS mechanism according to claim 10, it is characterized in that described system also comprises: at least one STA is used at least one described for the AP transmission blank-interface text that starts RTS/CTS mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022246.XA CN103249166B (en) | 2012-02-01 | 2012-02-01 | The starting method of a kind of RTS/CTS mechanism and device, system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210022246.XA CN103249166B (en) | 2012-02-01 | 2012-02-01 | The starting method of a kind of RTS/CTS mechanism and device, system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103249166A true CN103249166A (en) | 2013-08-14 |
| CN103249166B CN103249166B (en) | 2016-06-08 |
Family
ID=48928320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210022246.XA Active CN103249166B (en) | 2012-02-01 | 2012-02-01 | The starting method of a kind of RTS/CTS mechanism and device, system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103249166B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754601A (en) * | 2013-12-26 | 2015-07-01 | 中国移动通信集团公司 | Hidden node detection method, network node and server |
| CN105050197A (en) * | 2015-03-31 | 2015-11-11 | 魅族科技（中国）有限公司 | Wireless communication method, related devices for wireless communication, wireless communication system |
| CN105263158A (en) * | 2015-09-06 | 2016-01-20 | 江苏中兴微通信息科技有限公司 | Method for detecting hidden node pairs in enhanced wireless local area network |
| WO2016110241A1 (en) * | 2015-01-08 | 2016-07-14 | 中兴通讯股份有限公司 | Method and system for detecting hidden station, station and computer storage medium |
| CN103702419B (en) * | 2013-12-25 | 2017-02-08 | 福建星网锐捷网络有限公司 | Signal retransmission method based on intelligent distribution system, relevant equipment and intelligent distribution system |
| CN107079302A (en) * | 2014-12-03 | 2017-08-18 | 诺基亚通信公司 | Concealed nodes detection in LTE license auxiliary accesses |
| WO2020063781A1 (en) * | 2018-09-28 | 2020-04-02 | JRD Communication (Shenzhen) Ltd. | Conflict avoidance in a cellular network |
| CN113242610A (en) * | 2021-05-13 | 2021-08-10 | 电子科技大学 | Cumulant-based communication signal correlation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653837A (en) * | 2002-03-14 | 2005-08-10 | 空气磁体公司 | Detecting a hidden node in a wireless local area network |
| CN101711037A (en) * | 2009-12-23 | 2010-05-19 | 杭州华三通信技术有限公司 | Method and device for detecting hidden node |
| CN102045745A (en) * | 2010-12-17 | 2011-05-04 | 北京星网锐捷网络技术有限公司 | Hidden node detection method and equipment |
-
2012
- 2012-02-01 CN CN201210022246.XA patent/CN103249166B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653837A (en) * | 2002-03-14 | 2005-08-10 | 空气磁体公司 | Detecting a hidden node in a wireless local area network |
| CN101711037A (en) * | 2009-12-23 | 2010-05-19 | 杭州华三通信技术有限公司 | Method and device for detecting hidden node |
| CN102045745A (en) * | 2010-12-17 | 2011-05-04 | 北京星网锐捷网络技术有限公司 | Hidden node detection method and equipment |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103702419B (en) * | 2013-12-25 | 2017-02-08 | 福建星网锐捷网络有限公司 | Signal retransmission method based on intelligent distribution system, relevant equipment and intelligent distribution system |
| CN104754601A (en) * | 2013-12-26 | 2015-07-01 | 中国移动通信集团公司 | Hidden node detection method, network node and server |
| CN104754601B (en) * | 2013-12-26 | 2019-01-08 | 中国移动通信集团公司 | A kind of concealed nodes detection method, network node and server |
| US11323998B2 (en) | 2014-12-03 | 2022-05-03 | Nokia Solutions And Networks Oy | Hidden node detection in LTE licensed assisted access |
| CN107079302A (en) * | 2014-12-03 | 2017-08-18 | 诺基亚通信公司 | Concealed nodes detection in LTE license auxiliary accesses |
| WO2016110241A1 (en) * | 2015-01-08 | 2016-07-14 | 中兴通讯股份有限公司 | Method and system for detecting hidden station, station and computer storage medium |
| CN105050197B (en) * | 2015-03-31 | 2018-09-14 | 魅族科技（中国）有限公司 | A kind of wireless communications method, relevant device and system |
| CN105050197A (en) * | 2015-03-31 | 2015-11-11 | 魅族科技（中国）有限公司 | Wireless communication method, related devices for wireless communication, wireless communication system |
| CN105263158B (en) * | 2015-09-06 | 2018-10-23 | 江苏中兴微通信息科技有限公司 | The detection method of concealed nodes pair in a kind of enhanced wireless LAN |
| CN105263158A (en) * | 2015-09-06 | 2016-01-20 | 江苏中兴微通信息科技有限公司 | Method for detecting hidden node pairs in enhanced wireless local area network |
| WO2020063781A1 (en) * | 2018-09-28 | 2020-04-02 | JRD Communication (Shenzhen) Ltd. | Conflict avoidance in a cellular network |
| US11910437B2 (en) | 2018-09-28 | 2024-02-20 | JRD Communication (Shenzhen) Ltd. | Conflict avoidance in a cellular network |
| CN113242610A (en) * | 2021-05-13 | 2021-08-10 | 电子科技大学 | Cumulant-based communication signal correlation method |
| CN113242610B (en) * | 2021-05-13 | 2022-06-07 | 电子科技大学 | Cumulant-based communication signal correlation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103249166B (en) | 2016-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103249166A (en) | Method and device and system for starting RTS/CTS mechanism | |
| US9521587B2 (en) | System and method for determining a clear channel assessment threshold | |
| Lott et al. | Medium access and radio resource management for ad hoc networks based on UTRA TDD | |
| CN105493609A (en) | Adaptive RTS/CTS in high-efficiency wireless communications | |
| US9629182B2 (en) | Method and system for managing a wireless network comprising a distributed antenna system (DAS) | |
| CN101711037B (en) | Method and device for detecting hidden node | |
| US20190281540A1 (en) | System and Method for Basic Service Set Association | |
| WO2013107398A1 (en) | Node grouping method, node, and access point | |
| CN105247944A (en) | Methods and apparatus for clear channel assessment | |
| MX2007009406A (en) | Method and apparatus for determining ack frame to acknowledge receipt of transmission frame on a wlan. | |
| JP2006196985A (en) | Media access control method of radio system and media access control program of repeater station | |
| JP2014535248A5 (en) | ||
| US20160080124A1 (en) | Method, access point, server and station used for coordinated transmission | |
| US20070081485A1 (en) | Method,station and computer programme for accessing radio resources in and ad-hoc radio communication system | |
| CN107710846A (en) | The Poewr control method and device of data transfer | |
| Na et al. | Deafness-aware MAC protocol for directional antennas in wireless ad hoc networks | |
| US8488584B2 (en) | Method and apparatus for efficient data broadcast within beaconing network | |
| CN105684339A (en) | Enhanced subchannel selective transmission procedure | |
| WO2016106430A1 (en) | Simple mesh network for wireless transceivers | |
| Xie et al. | Busy tone‐based channel access control for cooperative communication | |
| JP4042901B2 (en) | Wireless terminal and wireless access control method thereof | |
| WO2012133857A1 (en) | Communication device, path search method and path search program | |
| Wen et al. | The performances study of IEEE 802.11 e to support QoS in channel error environment | |
| KR101373279B1 (en) | Access point for wireless LAN and method for medium access control thereof | |
| Zhu et al. | Performance improvement for IEEE 802.15. 4 CSMA/CA scheme in large‐scale wireless multi‐hop sensor networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |