CN101730107B - Method and system for accessing wireless local area network - Google Patents
Method and system for accessing wireless local area network Download PDFInfo
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- CN101730107B CN101730107B CN201010104244.6A CN201010104244A CN101730107B CN 101730107 B CN101730107 B CN 101730107B CN 201010104244 A CN201010104244 A CN 201010104244A CN 101730107 B CN101730107 B CN 101730107B
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Abstract
The invention discloses a method for accessing a wireless local area network, which comprises the following steps of: receiving a beaconing message sent by a network side, wherein the beaconing message carries a ultra-high handling (UHT) capacity information element and a UHT operation information element; acquiring and performing link verification on the network side according to the UHT capacity information element and the UHT operation information element; and performing associated operation by interacting the network side when the link verification is passed so as to access the wireless local area network. The invention also provides a corresponding wireless local area network system. The method and the system can greatly promote the speed of a physical layer and an MAC throughput, and maximally realize compatibility with the conventional related protocols and standards.
Description
Technical field
The present invention relates to radio communication with regard to networking technology area, be specifically related to the cut-in method and the system of WLAN.
Background technology
Collaborative networking of WLAN WLAN and 3G and fusion development will become next step development trend; Important supplement means as the 3G application; WLAN is with characteristics such as low cost, two-forty and easy deployment; Provide focus to cover with user at a high speed and insert, the WLAN industry has got into a high-speed development period now.Wlan network has been in the Large scale construction stage, is resolving on the basis of business model, and the construction of WLAN will impel operator to push the broadband cause to a new peak.In addition, WLAN also can be widely used in the private network field, has huge development space, and therefore, WLAN will present quick growing trend.Along with the formulation and the development of IEEE802.11 wireless network standards, make radio network technique ripe more and perfect.And successful be widely used in numerous industries.After the 802.11g agreement, industry has improved wireless network speed and compatible agreement---the 802.11n of better frequency range again, and this new wireless network protocol does not still obtain most Wireless Communication Equipment supports, so on market, seldom see.
The inventor after deliberation; Based on existing GB15629.11 series standard; Propose a kind of new WLAN technical scheme, its performance is superior to existing IEEE 802.11n system, and possesses the backwards compatibility of existing GB15629.11 series and IEEE 802.11n consensus standard.
Summary of the invention
In view of this, the present invention provides a kind of cut-in method and system of WLAN, can a kind of new higher mode of handling up insert WLAN.
The cut-in method of a kind of WLAN that the embodiment of the invention provides comprises:
Receive the beacon message that network side sends, this beacon message carries superelevation handle up UHT capability information element and UHT operation information element;
Obtain and carry out link verification according to said UHT ability information and UHT operation information element and network side;
After said link verification is passed through, with network side carry out alternately operation associated, to insert WLAN.
The embodiment of the invention also provides a kind of wireless local area network (WLAN) system, comprising:
First access point has the UHT ability, is used to send beacon message, and this message carries UHT capability information element and UHT operation information element;
First website has the UHT ability, is used to receive said beacon message, and verifies alternately and operation associated according to said UHT capability information element and UHT operation information element and first access point.
This wireless local area network (WLAN) system also comprises:
Second website does not have the UHT ability, is used to receive the beacon message of said first access point, verifies alternately with first access point and operation associated;
Second access point does not have the UHT ability, is used to send beacon message and gives said first website, verifies alternately with first website and operation associated.
In sum; The technical scheme that the superelevation that present embodiment provides is handled up WLAN (UHT-WLAN); Owing to adopted technology such as physical layer enhancing and the improvement of MAC layer; Significantly improve physical layer rate and MAC handles up, and farthest realized the backward compatibility with existing GB15629.11 agreement and IEEE802.11n standard.
Figure of description
Fig. 1 is the management plane configuration diagram of the UHT-WLAN agreement of the embodiment of the invention;
Fig. 2 is the wireless local area network access method flow chart that the embodiment of the invention one provides;
Fig. 3 is the wireless local area network access method flow chart in the embodiment of the invention two;
Fig. 4 is a kind of wireless local area network (WLAN) system sketch map that provides in the embodiment of the invention.
Embodiment
The superelevation that the present invention proposes handle up WLAN UHT-WLAN cut-in method and system; Technology such as physical layer enhancing and the improvement of MAC layer have been adopted; Significantly improve physical layer rate and MAC handles up, and farthest realized the backward compatibility with existing GB15629.11 series and IEEE 802.11n consensus standard.
The present invention is directed to the UHT-WLAN system, partly propose the corresponding implementation scheme with regard to the access-in management of involved relevant UHT.Specifically comprise access process,, propose corresponding step and the message interaction process of inserting in conjunction with system's new features of UHT-WLAN based on existing protocol.
After site STA or the access point AP process in starting the mac-layer protocol realization; At first carry out process initialization or system reset, " scanning " perhaps " beginning " then makes system get into the state of activation of BSS or IBSS; If preceding twice request is invalid, then require " adding "; After the activation of BSS or IBSS, confirm, confirm successfully after, carry out association again; After the related success, STA just becomes a member of BSS or IBSS, can carry out data communication with other STA, AP.Transfer of data is intact, just can cancel confirmation, and cancellation is related, withdraws from primary service area.
Medium access control (MAC; Media Access Control) layer and physical layer (PHY; Physical layer) at the conceptive management entity that comprises; Be called as media access control sublayer management entity (MLME, MAC layer Management Entity) and PHY layer management entity (PLME, Physical layer Management Entity) respectively.These entities provide the layer-management service interface, through these interfaces, can call the layer-management function, and are as shown in Figure 1.
Embodiment one
Access process under the passive access of the UHT STA UHT AP situation is described in the present embodiment.
When receiving the primitive MLME-SCAN.request that comprises SSID, UHT STA should intercept any beacon frame according to the value of parameter S canMode on all channels.In a single day scanning accomplished, and MLME just issues the BSS information that a primitive MLME-SCAN.confirm receives to indicate all.When receiving primitive MLME-JOIN.request, STA can join among the BSS through BSSID, TSF timer value, PHY parameter and the value of beacon period that adopts regulation in this request.
UHT STA receives UHT beacon (Beacon) message from access point AP, and reads the ability attribute relevant with UHT.Through UHT related (Association) and UHT link verification message such as (Authentication), carry out scanning respectively then, synchronous, whole access procedure is accomplished in authentication and function such as related.
With reference to Fig. 2, the cut-in method of a kind of WLAN that provides in the present embodiment comprises:
Step S101, network side access point AP sends UHT beacon (Beacon) message frame and gives the site STA among this WLAN, UHT ability information that UHT beacon (Beacon) message carries and UHT operation information element;
Particularly, site STA is waited for the Beacon beacon message frame that AP regularly sees off at set intervals, and this frame provides AP and place BSS relevant information.
After site STA receives beacon (Beacon) message, extract UHT ability information and UHT operation information element.
Step S102, site STA is sent the checking request message and is given access point AP, and receives the authentication response information of access point AP feedback, to obtain the checking result.
If checking is passed through, then get into step S103, otherwise finish the access process of this access point AP;
Step S103, site STA is sent association request message and is given network side, and this message carries UHT ability relevant information; Site STA receives the associate response message of network side feedback, and associate response message carries UHT ability relevant information and UHT operation information element.
Particularly, when AP after STA return authentication response message, authentication obtain to pass through, get into association phase.
STA sends association request to AP; AP returns associated response to STA.
So far, access procedure is just accomplished, and the STA initialization finishes, and can begin the transmit data frames to AP.
Need to prove that carrying UHT ability relevant information is to realize through following steps:
Reserved field is provided with UHT ability information bits in the corresponding existing message of utilization.Particularly, the flow process among the embodiment relates to message such as UHT Beacon, UHT Authentication; With message such as UHTAssociation; For the system of backward compatibility GB15629.11 series, at existing Beacon, Assocaition with existing IEEE 802.11n; The Authentication frame structure is expanded and is obtained, and utilizes reservation bit wherein to define the UHT characteristics field again.Concrete frame format is following:
Wherein the frame of beacon Beacon message is as shown in table 1:
Table 1
The association request message frame, as shown in table 2.
Table 2
The associate response message frame, as shown in table 3.
Table 3
Wherein the UHT ability information comprise following one of at least:
UHT STA announces that through sending the UHT capabilities element it is UHT STA.
The UHT capabilities element contains several fields that is used to broadcast the optional UHT ability of UHT STA.The UHT capabilities element appear at beacon, association request, associated response, again association request, again associated response, inquire after frame and inquire after in the response frame.Definition is as follows in the UHT capabilities element:
Wherein, the length in UHT ability information territory is 2 eight hytes, comprises capability information bit.This field comprises UHT time-delay piece affirmation/HT time-delay piece and confirms field, shows whether the UHT system supports the UHT delay block to confirm operation.The UHT capability information field is following:
Wherein UHT extended capability territory has defined: UHT physical layer protocol data unit (UHT PPDU:UHT Physical Protocol Data Unit) information, UHT adaptive subcarrier modulation (UHT ASM:UHT Adaptive Subcarrier Modulation) information and UHT control (UHTC:UHT Control) field information.UHT PPDU information wherein: expression is that the UHT system does not support physical layer superframe; Whether UHT ASM information representation supports whether the UHT system supports subcarrier; Whether UHTC information can carry the UHT control field in the mac frame of expression UHT system.
UHT extended capability information field is following:
UHT beacon frame wherein, UHT inquires after request, and UHT inquires after response frame, has defined UHT ability and UHT operation field in UHT association request and the UHT association response frame to support the UHT characteristic.
The UHT ability domain of dependence such as the table 4 of the related news frame of UHT-WLAN:
Table 4
The UHT operation field, as follows, occur comprising UHT protection and the non-greenery patches of the non-member height website of handling up.
It is as shown in table 5 that implication appears in UHT protection and non-member Non-greenfield HT STA.
Table 5
Can know by such scheme; Through UHT ability and UHT operation field are set in existing administrative messag frame; Insert the UHT WLAN with the indication site STA according to message format and flow process; User to realize UHT-WLAN inserts, and keeps the backward compatibility of the equipment of GB15629.11 serial equipment and IEEE802.11n.
Embodiment two
Describe UHT STA in the present embodiment and initiatively insert the access process under the UHT AP situation.
When receiving primitive MLME-SCAN.request, STA should send the SSID that comprises expectation and inquire after claim frame execution scanning.Inquire after response frame in case receive, expression scanning is accomplished, and MLME just issues a primitive MLME-SCAN.confirm, with the BSS information of indicating all to receive.
When receiving primitive MLME-JOIN.request, STA can join among the BSS through BSSID, TSF timer value, PHY parameter and the value of beacon period that adopts regulation in this request.Through UHT related (Association) and UHT link verification message such as (Authentication), accomplish whole access procedure then.
With reference to Fig. 3, the cut-in method of the another kind of WLAN that provides in the present embodiment comprises:
Step S200, the site STA active scan, with seek with STA under the AP of identical SSID arranged:
Transmission comprises the request message of inquiring after of SSID1 and gives each AP; And inquire after request message at this and carry UHT ability and UHT operation information element, to support the UHT characteristic;
Receive the response message of inquiring after of AP feedback, this is inquired after response message and carries SSID2;
When said SSID1 is identical with SSID2, receive beacon message from AP.
Step S201 to S203 is basic identical with the step S101 to S103 among the embodiment one, no longer repeats to give unnecessary details at this.
Embodiment three
A kind of wireless local area network (WLAN) system 400 as shown in Figure 4, that present embodiment provides comprises:
UHT access point AP410 has the UHT ability, is used to send beacon message, and this message carries UHT ability relevant information;
UHT site STA 420 has the UHT ability, is used to receive the beacon message that the UHT access point sends, and verifies alternately and operation associated according to UHT ability relevant information and first access point.
Also comprise in this wireless local area network (WLAN) system 400:
The website 430 of existing support GB15629.11 agreement and IEEE 802.11n, this website does not have the UHT ability, can receive the beacon message of UHT access point, verifies alternately with the UHT access point and operation associated, makes existing website can insert the UHT system.
The access point AP440 of existing support GB15629.11 agreement and IEEE 802.11n; Do not have the UHT ability; Can send existing beacon message and give the UHT website, verify alternately with the UHT website and operation associated, make the UHT website can insert existing wlan system.
Existing traditional STA (supporting GB15629.11 agreement and IEEE 802.11n) inserts the flow process of UHT access point AP:
STA intercepts the UHT Beacon message from UHT AP, and traditional STA can receive UHTBeacon message, and reads and GB15629.11, ability attribute that IEEE 802.11n is relevant.This moment, traditional STA was exactly the AP of UHT AP as support GB15629.11 agreement and IEEE 802.11n, through message such as existing association and link verification, accomplished access procedure.
UHT STA inserts the flow process of existing traditional access point AP (support GB15629.11 agreement and IEEE802.11n's):
UHT STA receives the Beacon message from existing traditional access point AP; The handling capacity field finds that it belongs to traditional AP, and UHT STA will work with traditional STA mode so; In processes such as subsequently association and link verification, all adopt traditional access message to accomplish access procedure.
In sum; The technical scheme that the superelevation that present embodiment provides is handled up WLAN (UHT-WLAN); Owing to adopted technology such as physical layer enhancing and the improvement of MAC layer; Significantly improve physical layer rate and MAC handles up, and farthest realized the backward compatibility with existing GB15629.11 agreement and IEEE802.11n standard.
According to the disclosed embodiments, can be so that those skilled in the art can realize or use the present invention.To those skilled in the art, the various modifications of these embodiment are conspicuous, and the general principles of definition here also can be applied to other embodiment on the basis that does not depart from the scope of the present invention with purport.Above-described embodiment is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the cut-in method of a WLAN is characterized in that, comprising:
Receive the beacon message that network side sends, this beacon message carries superelevation handle up UHT capability information element and UHT operation information element;
Obtain and carry out link verification according to said UHT capability information element and UHT operation information element and network side;
After said link verification is passed through, with network side carry out alternately operation associated, to insert WLAN;
Said UHT ability relevant information comprises at least one in the following information: show whether the UHT system supports the UHT delay block to confirm the UHT time-delay piece affirmation field of operation; Whether expression UHT system supports the UHT physical layer protocol data unit UHT PPDU information of physical layer superframe; Whether expression UHT system supports the UHT adaptive subcarrier of subcarrier to modulate the UHT that whether can carry the UHT control field in the mac frame of UHT ASM information and expression UHT system and controls the UHTC field information;
Said UHT operation relevant information comprises: indication field occurs for the UHT protected field of the protection demand of UHT transmission and the non-greenery patches of the non-member height website of handling up.
2. cut-in method as claimed in claim 1 is characterized in that, said and network side carries out operation associated alternately, specifically comprises:
Send association request message and give network side, this message carries the UHT capability information element;
Receive the associate response message of network side feedback, this message carries UHT capability information element and UHT operation information element.
3. cut-in method as claimed in claim 1; It is characterized in that, when site STA initiatively inserts, before the beacon message that receives the network side transmission; The step that also comprises the site STA active scan, so that the AP of same basic service set sign BSSID to be arranged under searching and the STA:
Send the request message of inquiring after that comprises basic service set identification BSSID and service site identity SSID1 to a broadcast address; And inquire after request message at this and carry UHT ability and UHT operation information element, to support the UHT characteristic;
Receive the response message of inquiring after of AP feedback, this is inquired after response message and carries SSID2;
When said SSID1 is identical with SSID2, receive beacon message from said AP.
4. like each described cut-in method in the claim 1 to 3, it is characterized in that the said UHT of carrying capability information element is to realize through following steps:
Reserved field is provided with UHT ability information bits in the corresponding existing message of utilization.
5. cut-in method as claimed in claim 1 is characterized in that, also comprises:
After the said beacon message that receives the network side transmission, website is according to definite link verification message format that is adopted of the ability of self and related message format.
6. a wireless local area network (WLAN) system is characterized in that, comprising:
First access point has the superelevation UHT ability of handling up, and is used to send beacon message, and this message carries UHT capability information element and UHT operation information element; Said UHT ability relevant information comprises at least one in the following information: show whether the UHT system supports the UHT delay block to confirm the UHT time-delay piece affirmation field of operation; Whether expression UHT system supports the UHT physical layer protocol data unit UHT PPDU information of physical layer superframe; Whether expression UHT system supports the UHT adaptive subcarrier of subcarrier to modulate the UHT that whether can carry the UHT control field in the mac frame of UHT ASM information and expression UHT system and controls the UHTC field information; Said UHT operation relevant information comprises: indication field occurs for the UHT protected field of the protection demand of UHT transmission and the non-greenery patches of the non-member height website of handling up;
First website has the UHT ability, is used to receive said beacon message, and verifies alternately and operation associated according to said UHT capability information element and UHT operation information element and first access point.
7. wireless local area network (WLAN) system as claimed in claim 6 is characterized in that, also comprises:
Second website does not have the UHT ability, is used to receive the beacon message of said first access point, verifies alternately with first access point and operation associated.
8. like claim 6 or 7 described wireless local area network (WLAN) system, it is characterized in that, also comprise:
Second access point does not have the UHT ability, is used to send beacon message and gives said first website, verifies alternately with first website and operation associated.
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| WO2013187710A1 (en) | 2012-06-13 | 2013-12-19 | 한국전자통신연구원 | Method for changing operating mode of wireless lan system and wireless lan system |
| CN108668348B (en) * | 2012-06-13 | 2021-08-27 | 韩国电子通信研究院 | Method and base station for wireless local area network system |
| KR101553856B1 (en) * | 2012-06-13 | 2015-09-17 | 주식회사 케이티 | Method for channel access in wireless local area network system |
| WO2015062038A1 (en) * | 2013-10-31 | 2015-05-07 | 华为技术有限公司 | Method, apparatus and system for requesting association |
| CN105792291B (en) * | 2014-12-23 | 2019-05-28 | 华为技术有限公司 | A kind of method and radio reception device of channel switching |
| BR112017028237A2 (en) | 2015-07-02 | 2018-09-04 | Huawei Technologies Co., Ltd. | And a method for establishing the association |
| CN107046730B (en) * | 2016-02-05 | 2021-01-22 | 中兴通讯股份有限公司 | Data transmission method and device |
| CN111181668B (en) * | 2019-04-24 | 2021-06-18 | 新华三技术有限公司 | Information acquisition method and device |
| CN112911685B (en) * | 2021-01-29 | 2023-05-02 | 成都极米科技股份有限公司 | Method, terminal and storage medium for scanning and synchronizing wireless local area network |
| CN117499981A (en) * | 2022-07-26 | 2024-02-02 | 华为技术有限公司 | Method and device for communication in wireless local area network |
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