WO2023035845A1 - 一种应用于通道直接链路建立的传输方法及装置 - Google Patents
一种应用于通道直接链路建立的传输方法及装置 Download PDFInfo
- Publication number
- WO2023035845A1 WO2023035845A1 PCT/CN2022/111737 CN2022111737W WO2023035845A1 WO 2023035845 A1 WO2023035845 A1 WO 2023035845A1 CN 2022111737 W CN2022111737 W CN 2022111737W WO 2023035845 A1 WO2023035845 A1 WO 2023035845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- sta
- bssid
- tdls
- address information
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 230
- 230000005540 biological transmission Effects 0.000 title claims abstract description 124
- 230000004044 response Effects 0.000 claims abstract description 197
- 239000003999 initiator Substances 0.000 claims abstract description 177
- 230000006854 communication Effects 0.000 claims abstract description 176
- 238000004891 communication Methods 0.000 claims abstract description 153
- 238000012790 confirmation Methods 0.000 claims description 38
- 238000004590 computer program Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 description 94
- 230000000875 corresponding effect Effects 0.000 description 80
- VYLDEYYOISNGST-UHFFFAOYSA-N bissulfosuccinimidyl suberate Chemical compound O=C1C(S(=O)(=O)O)CC(=O)N1OC(=O)CCCCCCC(=O)ON1C(=O)C(S(O)(=O)=O)CC1=O VYLDEYYOISNGST-UHFFFAOYSA-N 0.000 description 29
- 238000010586 diagram Methods 0.000 description 17
- 230000006870 function Effects 0.000 description 17
- ZAWXOCUFQSQDJS-UHFFFAOYSA-N 8-hydroxy-3-methyl-3,4-dihydro-2h-benzo[a]anthracene-1,7,12-trione Chemical compound O=C1C2=C(O)C=CC=C2C(=O)C2=C1C=CC1=C2C(=O)CC(C)C1 ZAWXOCUFQSQDJS-UHFFFAOYSA-N 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 230000002452 interceptive effect Effects 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- OVGWMUWIRHGGJP-WVDJAODQSA-N (z)-7-[(1s,3r,4r,5s)-3-[(e,3r)-3-hydroxyoct-1-enyl]-6-thiabicyclo[3.1.1]heptan-4-yl]hept-5-enoic acid Chemical compound OC(=O)CCC\C=C/C[C@@H]1[C@@H](/C=C/[C@H](O)CCCCC)C[C@@H]2S[C@H]1C2 OVGWMUWIRHGGJP-WVDJAODQSA-N 0.000 description 3
- 101100161473 Arabidopsis thaliana ABCB25 gene Proteins 0.000 description 3
- 101000988961 Escherichia coli Heat-stable enterotoxin A2 Proteins 0.000 description 3
- 101100096893 Mus musculus Sult2a1 gene Proteins 0.000 description 3
- 101150081243 STA1 gene Proteins 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 101100454361 Arabidopsis thaliana LCB1 gene Proteins 0.000 description 2
- 101100171146 Oryza sativa subsp. japonica DREB2C gene Proteins 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000000060 site-specific infrared dichroism spectroscopy Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
Definitions
- the present application relates to the technical field of wireless local area networks (WLAN), and in particular to a transmission method and device applied to tunneled direct link setup (Tunneled direct link setup, TDLS).
- WLAN wireless local area networks
- TDLS tunneled direct link setup
- the multi-BSSID set includes a plurality of basic service set identifiers (basic service set identifier, BSSID), and different BSSIDs in the plurality of BSSIDs are used to identify different basic service sets (basic service set, BSS).
- a WLAN communication network there may be multiple stations (stations, STAs) associated with the same access point (access point, AP), and multiple STAs may be recorded as STAs. If the STAs are within the reachable range of wireless communication, the STAs can establish a direct link based on TDLS, so as to perform point-to-point communication, increase transmission rate, and reduce delay.
- a BSS includes an AP and several STAs, and several STAs connected to the AP can communicate through TDLS.
- the TDLS radio frames sent and received need to carry the BSSID corresponding to the BSS.
- the STA can determine that the STA and the sender of the TDLS wireless frame It does not belong to the same BSS, and will not reply (or respond) to the TDLS radio frame.
- the TDLS direct link can only be established between sites within the same BSS. If two STAs belong to different BSSs, the two STAs cannot communicate based on TDLS.
- different APs in the same multi-BSSID set use the same communication parameters (such as operation set, channel number, antenna port, etc.), making it possible for STAs associated with different APs in the same multi-BSSID set Communication based on TDLS is required.
- the BSSIDs of the BSSs where STAs under different APs belong may be different, resulting in different APs associated in the same multi-BSSID set. STAs under the AP cannot communicate based on TDLS.
- the present application provides a transmission method and device applied to channel direct link establishment, which is used to enable different STAs associated in the same multi-BSSID set to communicate based on TDLS, so as to realize point-to-point communication, increase transmission rate, reduce delay.
- the first aspect of the present application provides a transmission method applied to TDLS, which is applied to WLAN communication.
- the method is executed by the first STA, or the method is implemented by some components (such as processors, chips, or chips) in the first STA. system, etc.), in the first aspect and possible implementations thereof, the method is executed by the first STA as an example for description.
- the first STA sends a first wireless frame, and the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSS where the first STA is located The BSSID in the multi-BSSID set to which the BSSID belongs; the first STA receives a second wireless frame, and the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame sent by the first STA includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the second aspect of the present application provides a transmission method applied to TDLS, which is applied to WLAN communication, and the method is executed by a second STA, or, the method is implemented by some components (such as a processor, a chip, or a chip) in the second STA. system, etc.), in the second aspect and possible implementations thereof, the method is executed by the second STA as an example for description.
- the second STA receives a first wireless frame, and the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSS where the second STA is located The BSSID in the multi-BSSID set to which the BSSID belongs; the second STA sends a second wireless frame, and the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame received by the second STA includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the third aspect of the present application provides a transmission device applied to TDLS, which is applied to WLAN communication.
- the device is a first STA, or the device is a part of components (such as a processor, a chip, or a chip system) in the first STA. wait).
- the sending unit in the device is configured to send a first wireless frame, where the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSS where the first STA is located
- the BSSID in the multi-BSSID set to which the BSSID belongs; the receiving unit in the device is used to receive the second wireless frame, and the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame sent by the sending unit includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the fourth aspect of the present application provides a transmission device applied to TDLS, which is applied to WLAN communication.
- the device is a second STA, or the device is a part of the second STA (such as a processor, a chip, or a chip system wait).
- the receiving unit in the device receives a first wireless frame, where the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSSID of the BSS where the second STA is located The BSSID in the multi-BSSID set to which it belongs; the sending unit in the device is used to send a second wireless frame, and the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame received by the receiving unit includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs. So that when the BSS where the first STA is located and the BSS where the second STA is located belong to the same multi-BSSID set, after the receiving unit receives the first wireless frame, the sending unit sends the first wireless frame based on the first wireless frame.
- the response frame is the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the initiator is the first STA, and the responder is the second STA; or, the initiator is the first STA where the first STA is located.
- a multi-link device MLD the responder is the second STA; or, the initiator is the first STA, and the responder is the second MLD where the second STA is located; or, the initiator is the first STA The first MLD where the STA is located, and the responder is the second MLD where the second STA is located.
- the initiator indicated by the address information of the initiator carried in the first wireless frame may specifically be the first STA or the first MLD where the first STA is located, and the first wireless The responder indicated by the address information of the responder carried in the frame may specifically be the second STA or the second MLD where the second STA is located.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located, that is, the TDLS initiator and the TDLS responder belong to the BSS corresponding to the same BSSID in the same multi-BSSID set.
- the first BSSID is the Transmitted BSSID in the multi-BSSID set; or,
- the first BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the first BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the first BSSID is any BSSID in the multi-BSSID set.
- the second wireless frame includes address information of the initiator, address information of the responder, and a second BSSID; wherein, the multi-BSSID The set includes the second BSSID.
- the second radio frame may also carry the address information of the initiator and the responder's address information.
- the address information and the second information element of the second BSSID for example, the second information element is included in the TDLS discovery response frame or the second information element is included in the TDLS setup response frame.
- the second BSSID is a BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs, so that when the BSSs where different STAs are located belong to the same multi-BSSID set, different STAs pass
- the response frame carries the BSSID in the multi-BSSID set to realize TDLS transmission (including TDLS discovery and/or TDLS establishment, etc.), so that different STAs associated in the same multi-BSSID set can communicate based on TDLS.
- the second BSSID is the Transmitted BSSID of the transmitted basic service set identifier in the multi-BSSID set;
- the second BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the second BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the second BSSID is any BSSID in the multi-BSSID set.
- the first BSSID is the same as the second BSSID.
- the first BSSID carried in the first wireless frame and the second BSSID carried in the second wireless frame may be the same BSSID, that is, the receiver of the first wireless frame receives the first BSSID carrying the first BSSID After one wireless frame, the second BSSID same as the first BSSID is carried in the response frame of the first wireless frame. While reducing the implementation complexity of the second wireless frame, it is also convenient for the sender of the first wireless frame to determine the second wireless frame as a response frame of the first wireless frame based on the same BSSID.
- the first BSSID is different from the second BSSID.
- the first BSSID carried in the first wireless frame and the second BSSID carried in the second wireless frame may be different BSSIDs, that is, the receiver of the first wireless frame receives the first BSSID carrying the first BSSID After one wireless frame, a second BSSID different from the first BSSID is carried in the response frame of the first wireless frame.
- the receiver of the first wireless frame does not need to be limited by the setting of the BSSID carried by the first wireless frame, and the implementation flexibility of the second wireless frame is improved.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located, that is, the TDLS initiator and the TDLS responder respectively belong to BSSs corresponding to different BSSIDs in the same multi-BSSID set.
- Enable TDLS transmission between STAs in different BSSs by carrying the BSSID in the multi-BSSID set in the wireless frame, and implement TDLS-based TDLS transmission between multiple STAs in different BSSs associated in the same multi-BSSID set communication.
- the first radio frame is a TDLS discovery request frame and the second radio frame is a TDLS discovery response frame; or,
- the first radio frame is a TDLS setup request frame and the second radio frame is a TDLS setup response frame; or,
- the first radio frame is a TDLS setup acknowledgment frame and the second radio frame is a first acknowledgment frame; or,
- the first wireless frame is a TDLS data frame and the second wireless frame is a second confirmation frame.
- the method can be applied to various communication processes of TDLS.
- the method is applied to the TDLS discovery process; or, the first radio frame is a TDLS establishment request frame and the second radio frame
- this method is applied to the TDLS establishment process.
- the process may be called a TDLS authentication process; the first wireless frame is a TDLS data frame and the When the second radio frame is the second acknowledgment frame, this process may be referred to as a TDLS data frame transmission process.
- the first acknowledgment frame may be an acknowledgment (acknowledge, ACK) frame
- the second acknowledgment frame may be a block acknowledgment (block acknowledgment, Block ACK, BA for short) frame or ACK frame.
- the first wireless frame includes a link identification information (Link Identifier element, LIE) element, and the link identification information element includes the initiator The address information of the responder, the address information of the responder and the first BSSID, wherein the address information of the initiator is the MAC address information of the first STA.
- LIE Link Identification Information
- the first STA is a single-link device.
- the receiver of the first wireless frame (for example, the second STA) can receive and obtain the MAC address information of the first STA based on the link identification information element. Therefore, the receiver of the first wireless frame can receive the MAC address information of the first STA in the location of the link identification information element in the first wireless frame, and the receiver of the subsequent first wireless frame can obtain the MAC address information based on the first STA's MAC address information is communicated with the first STA.
- the first radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the initiator's address information, the address information of the responder and the first BSSID, wherein the address information of the initiator is the MAC address information of the first MLD where the first STA is located;
- the multi-link element includes the MAC address of the first STA information.
- the first STA is an STA in the multi-link device.
- the first radio frame sent by the first STA may further carry a multi-link element used to indicate the link information of the first MLD where the first STA is located.
- the address information of the initiator may be the MAC address information of the first MLD where the first STA is located, to indicate that the initiator of the TDLS is the first MLD, and subsequently the second
- the second STA (or the second MLD where the second STA is located) may implement a TDLS-based communication process with the first MLD based on the first radio frame.
- the multi-link element includes a public information field, and the MAC address information of the first STA is located in the public information field.
- the MAC address information of the first STA is located in the public information field of the first multi-link element included in the first radio frame, so that the receiver of the first radio frame can determine the STA based on the public information field. MAC address information of the first STA.
- the first radio frame includes a multi-link element, and the multi-link element includes a first field, where the first field is used to indicate the Whether the multi-link element includes the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame includes the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame does not include the MAC address information of the first STA.
- the first value is different from the second value.
- the first field is located in a presence bitmap field in the multilink element.
- the first field is located in the presence bitmap field of the multi-link element included in the first radio frame, so that the receiver of the first radio frame can determine the first field based on the presence bitmap field.
- the second radio frame includes a link identification information element, and the link identification information element includes the address information of the initiator, the responder address information and the second BSSID.
- the address information of the responder is MAC address information of the MAC of the second STA.
- the second STA is a single-link device.
- the recipient of the second wireless frame (for example, the first STA) can receive and obtain the MAC address information of the second STA based on the link identification information element. Therefore, the receiver of the second wireless frame can receive the MAC address information of the second STA at the location of the link identification information element in the second wireless frame, and the receiver of the subsequent second wireless frame can obtain the MAC address information of the second STA based on the The MAC address information is communicated with the second STA.
- the second radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the initiator's address information, address information of the responder and the second BSSID, where the address information of the responder is the MAC address information of the second MLD where the second STA is located;
- the multi-link element includes the MAC address information of the second STA.
- the second STA is an STA in the multi-link device.
- the second radio frame sent by the second STA may further carry a multi-link element used to indicate the link information of the second MLD where the second STA is located.
- the address information of the responder in the transmission process applied to TDLS, may be the MAC address information of the second MLD where the second STA is located, to indicate that the responder of the TDLS is the second MLD, and subsequently the second MLD may be made
- a STA (or the first MLD where the first STA is located) may implement a TDLS-based communication process with the second MLD based on the second radio frame.
- the multi-link element includes a common information field, and the MAC address information of the second STA is located in the common information field.
- the MAC address information of the second STA is located in the public information field of the second multi-link element included in the second radio frame, so that the receiver of the second radio frame can determine the MAC address information of the second STA.
- the second radio frame includes a multi-link element, and the multi-link element includes a second field, where the second field is used to indicate the Whether the multi-link element includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame does not include the MAC address information of the second STA.
- the first value is different from the second value.
- the second field is located in the presence bitmap field in the multilink element.
- the first field is located in the presence bitmap field of the multi-link element included in the first radio frame, so that the receiver of the first radio frame can determine the first field based on the presence bitmap field.
- the first wireless frame further includes a tunneled direct link setup peer key handshake message (tunneled direct link setup peer key handshake message, TPK Handshake Message), the TPK Handshake Message is used to carry the parameters required to generate the channel direct link setup peer key (tunneled direct link setup peer key, TPK), and the parameters include the first BSSID.
- TPK Handshake Message tunneled direct link setup peer key handshake message
- TPK Handshake Message tunneled direct link setup peer key handshake message
- TPK Handshake Message tunneled direct link setup peer key handshake message
- TPK Handshake Message tunneled direct link setup peer key handshake message
- the second radio frame further includes a TPK Handshake Message, where the TPK Handshake Message is used to carry parameters required to generate the TPK, and the parameters include the second BSSID.
- the first radio frame further includes parameters required by the TPK, and the parameters include the first BSSID.
- TPK is the secret key used for TDLS communication, so that the secret key is generated based on the first BSSID (or second BSSID), which provides the communication between different STAs associated in the same multi-BSSID set based on TDLS. How to generate the secret key.
- the first STA and the second STA belong to different multilink devices (multiple link device, MLD).
- MLD multiple link device
- the first STA and the second STA belong to different MLDs respectively, so that the transmission method can also realize TDLS-based communication between multiple STAs associated in different MLDs in the same multi-BSSID set. communication.
- the first STA and the second STA belong to the same MLD.
- the first STA and the second STA belong to the same MLD, and realize communication based on TDLS between multiple STAs associated in the same MLD in the same multi-BSSID set.
- the method before sending the first wireless frame, the method further includes: the first STA sends a third wireless frame, where the third wireless frame includes the responder's internet protocol (internet protocol, IP) address information, and the inquiry frame is used to request the MAC address information of the responder; the first STA receives the response frame of the third wireless frame, and the response frame of the third wireless frame includes the MAC address of the responder Address information.
- IP internet protocol
- the first STA may also request the MAC address of the responder based on the third wireless frame carrying the IP address of the responder, so as to pass the response frame of the third wireless frame Determine the MAC address of the responder carried in the first wireless frame.
- the first STA may determine the responder's IP address based on the user's input operation, and the first STA may also determine the responder's IP address based on the AP configuration information/instructions. The STA may also determine the responder's IP address based on scanning the two-dimensional code, and the first STA may also determine the responder's IP address in other ways, which are not limited here.
- the first BSSID is the BSSID corresponding to the BSS where the responder is located
- the method further includes: the first STA sends a fourth wireless frame , the fourth wireless frame includes address information of the responder, and the inquiry frame is used to request the BSSID corresponding to the BSS where the responder is located; the first STA receives the response frame of the fourth wireless frame, and the fourth wireless frame
- the response frame includes the BSSID corresponding to the BSS where the responder is located.
- the first BSSID carried in the first wireless frame may be the BSSID corresponding to the BSS where the responder is located. Therefore, before the first STA sends the first wireless frame, the first STA may also request the BSSID corresponding to the BSS where the responder is located based on the fourth wireless frame carrying the address information of the responder, so as to pass the response frame of the fourth wireless frame Determine the BSSID corresponding to the BSS where the responder is located in the first radio frame.
- the responder's address information includes the responder's MAC address information
- the sending unit is further configured to send a third wireless frame, and the third wireless frame includes the responder's IP address information of the responder, and the query frame is used to request the responder’s MAC address information
- the receiving unit is also used to receive the response frame of the third wireless frame, the response frame of the third wireless frame includes the responder’s MAC address information.
- the device may also request the MAC address of the responder based on the third wireless frame carrying the IP address of the responder, so as to determine the second wireless frame through the response frame of the third wireless frame.
- the MAC address of the responder carried in a wireless frame.
- the first BSSID is the BSSID corresponding to the BSS where the responder is located;
- the sending unit is further configured to send a fourth radio frame, and the fourth radio frame includes the responder address information, and the query frame is used to request the BSSID corresponding to the BSS where the responder is located;
- the receiving unit is also used to receive the response frame of the fourth wireless frame, the response frame of the fourth wireless frame includes the responder The BSSID corresponding to the BSS where it is located.
- the first BSSID carried in the first wireless frame may be the BSSID corresponding to the BSS where the responder is located. Therefore, before the sending unit sends the first wireless frame, the device may also request the BSSID corresponding to the BSS where the responder is located based on the fourth wireless frame carrying the address information of the responder, so as to determine the fourth wireless frame through the response frame of the fourth wireless frame.
- the BSSID corresponding to the BSS where the responder is located carried in a radio frame.
- the first radio frame includes a TDLS discovery request frame, a TDLS establishment request frame, or a TDLS establishment confirmation frame;
- the first STA sends the first
- the wireless frame includes: the first STA sends the first wireless frame to the first access point AP associated with the first STA, and the first wireless frame also includes an address one (Adrress 1, A1) field, an address two (Adrress 2 , A2) field and address three (Adrress 3, A3) field; Wherein, the value of this A1 field is the address information of this first AP, the value of this A2 field is the address information of this first STA, and the value of this A3 field The value of is the address information of the responder.
- the first radio frame specifically includes (or expressed as bearer) TDLS discovery request frame, TDLS establishment request frame or TDLS establishment acknowledgment frame.
- the first STA may send the first wireless frame to the first AP associated with the first STA.
- the first radio frame further includes an A1 field for indicating a receiver address (RA) of the first radio frame, for indicating an address (transmitter address, TA) of a sender of the first radio frame
- the A2 field is used to indicate the A3 field of the destination address (DA) of the first radio frame.
- the first wireless frame is a TDLS data frame
- sending the first wireless frame by the first STA includes: the first STA sending the first wireless frame to the second Two STAs send the first wireless frame, and the first wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the responder, and the value of the A2 field is the first The address information of the STA, the value of the A3 field is the BSSID or the MAC address of the AP MLD.
- the method can be applied to various TDLS transmission processes, such as TDLS data transmission process, that is, the first radio frame is a TDLS data frame.
- the first STA may specifically send the first radio frame to the second STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the second radio frame is a TDLS setup response frame; receiving the second radio frame by the first STA includes: the first STA receiving the The second wireless frame of the first AP associated with the first STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the address information of the first STA, The value of the A2 field is the address information of the first AP, and the value of the A3 field is the address information of the responder.
- the method can be applied to various transmission processes of TDLS, such as TDLS establishment process, etc.
- the second radio frame is specifically a TDLS establishment response frame.
- the first STA may receive the second wireless frame sent from the first AP associated with the first STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the second radio frame includes a TDLS discovery response frame, a response frame of a TDLS establishment confirmation frame, or a response frame of a TDLS data frame;
- the first The STA receiving the second radio frame includes: the first STA receiving the second radio frame from the second STA, where the second radio frame includes an A1 field, an A2 field, and an A3 field; where the A1 field takes The value is the address information of the initiator, the value of the A2 field is the address information of the second STA, and the value of the A3 field is the MAC address information of BSSID or AP MLD.
- the second radio frame specifically includes (or expressed as bearer) TDLS discovery response frame , The response frame of the TDLS establishment confirmation frame or the response frame of the TDLS data frame.
- the first STA may receive the second radio frame sent by the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the first wireless frame includes a TDLS discovery request frame, a TDLS establishment request frame, or a TDLS establishment confirmation frame;
- the second STA receives the first
- the wireless frame includes: the second STA receives the first wireless frame from the second AP associated with the second STA, and the first wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the second STA, the value of the A2 field is the address information of the second AP, and the value of the A3 field is the address information of the initiator.
- the first radio frame specifically includes (or expressed as bearer) TDLS discovery request frame, TDLS establishment request frame or TDLS establishment acknowledgment frame.
- the second STA may receive the first wireless frame sent from the second AP associated with the second STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the first wireless frame is a TDLS data frame; receiving the first wireless frame by the second STA includes: the second STA receiving the The first wireless frame of the first STA, the first wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the second STA, and the value of the A2 field is the originating The address information of the recipient, the value of the A3 field is the BSSID or the MAC address information of the AP MLD.
- the method can be applied to various TDLS transmission processes, such as TDLS data transmission process, that is, the first radio frame is a TDLS data frame.
- the second STA may specifically receive the first radio frame sent from the first STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the second radio frame is a TDLS establishment response frame; sending the second radio frame by the second STA includes: the first STA sends the The second AP associated with the second STA sends the second wireless frame, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the address information of the second AP, and the The value of the A2 field is the address information of the second STA, and the value of the A3 field is the address information of the initiator.
- the method can be applied to various transmission processes of TDLS, such as TDLS establishment process, etc.
- the second radio frame is specifically a TDLS establishment response frame.
- the second STA may specifically send the second wireless frame to the second AP associated with the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the second radio frame includes a TDLS discovery response frame, a response frame of a TDLS establishment confirmation frame, or a response frame of a TDLS data frame;
- the second The STA sending the second radio frame includes: the second STA sending the second radio frame to the first STA, where the second radio frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is For the address information of the initiator, the value of the A2 field is the address information of the second STA, and the value of the A3 field is the MAC address information of BSSID or AP MLD.
- the second radio frame specifically includes (or expressed as bearer) TDLS discovery response frame , The response frame of the TDLS establishment confirmation frame or the response frame of the TDLS data frame.
- the second STA may specifically send the second radio frame to the second STA associated with the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the fifth aspect of the embodiment of the present application provides a communication method, which is applied to WLAN communication, and the method is executed by the AP, or, the method is executed by some components in the AP (such as a processor, a chip, or a chip system, etc.), in In the fifth aspect and possible implementation manners thereof, description is made by taking the method executed by the AP as an example.
- the AP receives a third wireless frame from the first STA, the third wireless frame includes the IP address information of the responder, and the inquiry frame is used to request the MAC address information of the responder; wherein, the first The BSS where the STA is located is different from the BSS where the responder is located; the AP sends the response frame of the third wireless frame, and the response frame of the fourth wireless frame includes the MAC address information of the responder.
- the third wireless frame carrying the responder's IP address received by the AP is used to request the responder's MAC address, so that the AP sends a response frame of the third wireless frame based on the third wireless frame, so that the first The STA determines the MAC address of the responder through the response frame of the third radio frame.
- the first STA can implement TDLS transmission with the responder through the first wireless frame carrying the MAC address of the responder, and the BSS where the first STA is located and the BSS where the responder is located belong to the same multi-BSSID set and the first The BSS where the STA resides is different from the BSS where the responder resides.
- STAs in different BSSs realize TDLS transmission by carrying the MAC address indicated by the AP in the wireless frame, so that different STAs associated in the same multi-BSSID set can communicate based on TDLS to realize point-to-point communication and improve transmission speed and reduce latency.
- the sixth aspect of the embodiment of the present application provides a communication device, which is applied to WLAN communication, and the device is an AP, or, the device is a part of components in the AP (such as a processor, a chip, or a chip system, etc.).
- the receiving unit in the device is configured to receive a third wireless frame from the first STA, the third wireless frame includes the IP address information of the responder, and the inquiry frame is used to request the MAC address information of the responder; wherein, The BSS where the first STA is located is different from the BSS where the responder is located; the sending unit in the device is configured to send the response frame of the third wireless frame, and the response frame of the fourth wireless frame includes the MAC address of the responder information.
- the third wireless frame carrying the responder's IP address received by the receiving unit is used to request the responder's MAC address, so that the sending unit sends a response frame of the third wireless frame based on the third wireless frame, so that The first STA determines the MAC address of the responder through the response frame of the third wireless frame. Thereafter, the first STA can implement TDLS transmission with the responder through the first wireless frame carrying the MAC address of the responder, and the BSS where the first STA is located and the BSS where the responder is located belong to the same multi-BSSID set and the first The BSS where the STA resides is different from the BSS where the responder resides.
- STAs in different BSSs realize TDLS transmission by carrying the MAC address indicated by the AP in the wireless frame, so that different STAs associated in the same multi-BSSID set can communicate based on TDLS to realize point-to-point communication and improve transmission speed and reduce latency.
- the responder is the second STA or the second MLD where the second STA is located.
- the first STA is located on the same local area network as the responder; or,
- the first STA is located on the same subnet as the responder; or,
- mapping relationship between the responder's identification information and the responder's address information is pre-configured on the AP.
- the AP is an AP associated with the first STA, and the BSS where the first STA is located and the BSS where the responder is located belong to the same multi-BSSID set.
- the AP may set the BSS where the first STA is located and the BSS where the responder is located in the same local area network (or the same subnet) in a preconfigured manner, so as to determine the MAC address of the responder.
- the AP may interact with the AP associated with the responder to determine the MAC address of the responder.
- the method further includes: the AP receives a fourth wireless frame from the first STA, and the fourth wireless frame The frame includes the address information of the responder, and the inquiry frame is used to request the BSSID corresponding to the BSS where the responder is located; the AP sends the response frame of the fourth wireless frame, and the response frame of the fourth wireless frame includes the response frame of the responder The BSSID corresponding to the BSS where it is located.
- the fourth wireless frame carrying the address information of the responder received by the AP is used to request the BSSID corresponding to the BSS where the responder is located, so that the AP sends a response frame of the fourth wireless frame based on the fourth wireless frame, so as to
- the first STA determines the BSSID corresponding to the BSS where the responder is located through the response frame of the fourth radio frame. Thereafter, the first STA may implement TDLS transmission with the responder through the first radio frame carrying the BSSID corresponding to the BSS where the responder is located.
- STAs in different BSSs realize TDLS transmission by carrying the BSSID corresponding to the BSS where other STAs are located indicated by the AP in the wireless frame, so that different STAs associated in the same multi-BSSID set communicate based on TDLS, In order to realize point-to-point communication, improve transmission rate and reduce delay.
- the receiving unit is further configured to receive a fourth wireless frame from the first STA, where the fourth wireless frame includes the address information of the responder, and the inquiry frame is used to requesting the BSSID corresponding to the BSS where the responder is located; the sending unit is further configured to send a response frame of the fourth wireless frame, and the response frame of the fourth wireless frame includes the BSSID corresponding to the BSS where the responder is located.
- the fourth wireless frame carrying the address information of the responder received by the receiving unit is used to request the BSSID corresponding to the BSS where the responder is located, so that the device sends a response frame of the fourth wireless frame based on the fourth wireless frame , so that the first STA determines the BSSID corresponding to the BSS where the responder is located through the response frame of the fourth radio frame. Thereafter, the first STA may implement TDLS transmission with the responder through the first radio frame carrying the BSSID corresponding to the BSS where the responder is located.
- STAs in different BSSs realize TDLS transmission by carrying the BSSID corresponding to the BSS where other STAs are located indicated by the AP in the wireless frame, so that different STAs associated in the same multi-BSSID set communicate based on TDLS, In order to realize point-to-point communication, improve transmission rate and reduce delay.
- the seventh aspect of the embodiment of the present application provides a communication device, including at least one processor, the at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions, To enable the device to implement the method described in the first aspect or any possible implementation of the first aspect, or to enable the device to implement the method described in the second aspect or any possible implementation of the second aspect method, or to enable the device to implement the method described in the fifth aspect or any possible implementation manner of the fifth aspect.
- the eighth aspect of the embodiment of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions.
- the processor executes any one of the first aspect or the first aspect.
- the ninth aspect of the embodiment of the present application provides a computer program product (or computer program) storing one or more computers.
- the processor executes the above-mentioned first aspect or the first The method in any possible implementation manner of the second aspect, or, the processor executes the method described in the second aspect or any possible implementation manner of the second aspect, or, the processor executes the method described in the fifth aspect or the first aspect The method described in any possible implementation of the five aspects.
- the tenth aspect of the embodiment of the present application provides a chip system, where the chip system includes at least one processor, configured to support the communication device to implement the functions involved in the first aspect or any possible implementation manner of the first aspect; Or, it is used to support the communication device to realize the functions involved in the second aspect or any possible implementation manner of the second aspect; or, it is used to support the communication device to realize the fifth aspect or any possible implementation of the fifth aspect.
- the chip system includes at least one processor, configured to support the communication device to implement the functions involved in the first aspect or any possible implementation manner of the first aspect; Or, it is used to support the communication device to realize the functions involved in the second aspect or any possible implementation manner of the second aspect; or, it is used to support the communication device to realize the fifth aspect or any possible implementation of the fifth aspect.
- the chip system may further include a memory for storing necessary program instructions and data of the communication device.
- the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
- the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
- the eleventh aspect of the embodiment of the present application provides a communication system, the communication system includes the communication device of the third aspect and the communication device of the fourth aspect, and/or, the communication system includes the communication device of the sixth aspect, And/or, the communication system includes the communication device of the seventh aspect above.
- the technical effects brought about by any one of the design methods in the seventh aspect to the eleventh aspect can refer to the technical effects brought about by the different implementation methods in the first aspect to the sixth aspect above, and will not be repeated here.
- the first wireless frame sent by the first STA includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- Fig. 1 is a schematic diagram of the communication system applied in the present application
- FIG. 2a is a schematic diagram of a wireless frame provided by an embodiment of the present application.
- FIG. 2b is another schematic diagram of a wireless frame provided by an embodiment of the present application.
- FIG. 3 is another schematic diagram of a wireless frame provided by an embodiment of the present application.
- FIG. 4 is another schematic diagram of a wireless frame provided by an embodiment of the present application.
- Fig. 5a is another schematic diagram of the communication system applied in the present application.
- Fig. 5b is another schematic diagram of the communication system applied in the present application.
- FIG. 5c is another schematic diagram of a wireless frame provided by an embodiment of the present application.
- FIG. 5d is another schematic diagram of a wireless frame provided by an embodiment of the present application.
- FIG. 6 is a schematic diagram of a transmission method applied to TDLS provided by an embodiment of the present application.
- FIG. 7a is another schematic diagram of a transmission method applied to TDLS provided by the embodiment of the present application.
- FIG. 7b is another schematic diagram of a transmission method applied to TDLS provided by the embodiment of the present application.
- FIG. 8 is a schematic diagram of a communication device provided by an embodiment of the present application.
- FIG. 9 is another schematic diagram of a communication device provided by an embodiment of the present application.
- plural means two or more than two.
- At least one of the following or similar expressions refer to any combination of these items, including any combination of single or plural items.
- at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
- words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
- words such as “exemplary” or “for example” are used to represent examples, illustrations or descriptions. Any embodiment or design solution described as “exemplary” or “for example” in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as “exemplary” or “such as” is intended to present relevant concepts in a concrete manner for easy understanding.
- system architecture of the method provided in the embodiment of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is for more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application.
- the technical solution provided by this application can be applied to WLAN scenarios, for example, it can be applied to IEEE 802.11 system standards, such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be Standard or next-generation standard.
- IEEE 802.11 system standards such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be Standard or next-generation standard.
- the embodiment of the present application mainly takes the deployment of a WLAN network, especially a network using the IEEE 802.11 system standard as an example for illustration, those skilled in the art can easily understand that various aspects involved in this application can be extended to other networks using various standards or protocols , for example, BLUETOOTH (Bluetooth), high performance wireless LAN (high performance radio LAN, HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard, mainly used in Europe), and wide area network (WAN), personal area network (personal area network , PAN) or other networks known or developed later.
- BLUETOOTH Bluetooth
- high performance wireless LAN high performance radio LAN, HIPERLAN
- WAN wide area network
- PAN personal area network
- the various aspects presented herein can be applied to any suitable wireless network, regardless of the coverage area and wireless access protocol used.
- the embodiments of the present application may also be applicable to wireless local area network systems such as an Internet of Things (Internet of Things, IoT) network or a Vehicle to X (Vehicle to X, V2X) network.
- IoT Internet of Things
- Vehicle to X Vehicle to X
- the embodiment of the present application can also be applicable to other possible communication systems, for example, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division) duplex, TDD), universal mobile telecommunication system (universal mobile telecommunication system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, fifth generation (5th generation, 5G) communication system, and future The sixth generation (6th generation, 6G) communication system, etc.
- LTE long term evolution
- FDD frequency division duplex
- TDD time division duplex
- TDD time division duplex
- TDD time division du
- the transmission method and device for channel direct link establishment can be applied to a wireless communication system, and the wireless communication system can be a wireless local area network (wireless local area network, WLAN) or a cellular network, and the method can be implemented by Realized by a communication device in a wireless communication system or a chip or a processor in a communication device, the communication device may be a wireless communication device that supports multiple links for parallel transmission, for example, called a multi-link device (multi-link device, MLD) or multi-band device (multi-band device). Compared with devices that only support single-link transmission, multi-link devices have higher transmission efficiency and higher throughput.
- MLD multi-link device
- multi-band device multi-band device
- FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
- the communication device involved in the present application transmission device applied to channel direct link establishment
- the communication device (wireless frame sending device or wireless frame receiving device) involved in the present application may also be a single-link device, and what is shown in FIG. 1 is only an example, and should not be construed as a limitation to the present application.
- the communication system mainly includes at least one multi-link access point device (Multi-linkAP device) and at least one multi-link non-AP station device (Multi-link non-AP STA device) (referred to as is a multi-link site device), where the multi-link access point device and the multi-link site device may be collectively referred to as a multi-link device.
- Multi-linkAP device multi-link access point device
- Multi-link non-AP STA device multi-link non-AP station device
- the multi-link device will be introduced below.
- a multi-link device includes one or more affiliated stations (affiliated stations, denoted as affiliated STAs), and an affiliated STA is a logical station that can work on one link.
- the affiliated station may be an access point (access point, AP) or a non-access point station (non-access point station, non-AP STA).
- the multi-link device whose affiliated station is an AP can be called a multi-link AP or a multi-link AP device (multi-link AP device) or an AP multi-link device (AP multi-link device).
- the affiliated station is a non-AP STA multi-link device (multi-link non-AP STA device) can be called a multi-link STA or multi-link STA device or STA multi-link device (STA multi-link device) .
- the multi-link device includes the subordinate STA is also briefly described as “the multi-link device includes the STA” in the embodiment of the present application.
- a multi-link device includes multiple logical sites, and each logical site works on one link, but allows multiple logical sites to work on the same link.
- the link identifier mentioned below represents a station working on a link, that is, if there is more than one station on a link, more than one link identifier is required to represent them.
- the link mentioned below sometimes also means the station working on the link.
- a link identifier can be used to identify a link or a station on a link.
- the multi-link AP device and the multi-link STA device may first negotiate or communicate the correspondence between the link identifier and a link or a station on a link. Therefore, in data transmission, there is no need to transmit a large amount of signaling information to indicate a link or a site on the link, just carry the link identifier, which reduces signaling overhead and improves transmission efficiency.
- each link identification information field can suggest The corresponding relationship between a link ID and the stations working on a link.
- Each link identification information field includes a link identification, and also includes: one or more of medium access control (medium access control, MAC) address, operation set, and channel number, wherein the MAC address, operation set, and channel number are One or more of may indicate a link; in another example, in the multi-link establishment association process, the multi-link AP device and the multi-link site device negotiate multiple link identification information fields.
- medium access control medium access control
- the multi-link AP device or the multi-link station device will use the link identifier to represent a station in the multi-link device.
- the link identifier can also represent the MAC address of the station, and the working operation set , one or more attributes in the channel number.
- the MAC address may also be replaced with an association identifier of the associated multi-link AP device.
- the link identifier (a digital ID)
- the meaning of representation includes not only the operation set where the link is located, the channel number, but also the station identifier working on the link , such as the MAC address of the site or (association identifier, AID).
- Multi-link devices can follow 802.11 series protocols to realize wireless communication, for example, follow extremely high throughput (extremely high throughput, EHT) sites, or follow 802.11be-based or compatible 802.11be-supported sites to achieve communication with other devices, of course Other devices may or may not be multilink devices.
- EHT extremely high throughput
- 802.11be-based or compatible 802.11be-supported sites to achieve communication with other devices, of course
- Other devices may or may not be multilink devices.
- the non-AP MLD involved in this application can be a wireless communication chip, a wireless sensor or a wireless communication terminal.
- user terminals, user devices, access devices, subscriber stations, subscriber units, mobile stations, user agents, and user equipment supporting Wi-Fi communication functions may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, Internet of things (IoT) devices, computing devices or other processing devices connected to a wireless modem, and various forms of user equipment (UE), mobile station (mobile station, MS) , terminal, terminal equipment, portable communication device, handset, portable computing device, entertainment device, gaming device or system, GPS device, or any other suitable device configured to communicate over a network via a wireless medium equipment etc.
- IoT Internet of things
- non-AP MLD can support the 802.11be standard or the next-generation WLAN standard of 802.11be.
- Non-AP MLD can also support multiple WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
- the AP MLD involved in the embodiment of this application can be a device that is deployed in a wireless communication network to provide wireless communication functions for its associated non-AP, and is mainly deployed in homes, buildings, and campuses, with a typical coverage radius of tens of meters. Of course, it can also be deployed outdoors.
- AP MLD is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet.
- the AP MLD can be a base station with a Wi-Fi chip, a router, a gateway, a repeater, a communication server, a switch or a network bridge and other communication equipment, wherein the base station can include various forms of macro base stations, micro base stations , relay station, etc.
- the AP MLD can support the 802.11be standard or the next-generation WLAN standard of 802.11be.
- AP MLD can also support WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.
- Tunneled direct link setup (Tunneled direct link setup, TDLS)
- a WLAN communication network there may be multiple stations (stations, STAs) associated with the same access point (access point, AP), and multiple STAs may be recorded as STAs. If the STAs are within the reachable range of wireless communication, the STAs can establish a direct link based on TDLS, so as to perform point-to-point communication, increase transmission rate, and reduce delay. Through the TDLS discovery process and the TDLS establishment process, two sites can establish a direct link for point-to-point communication. When the direct link is no longer needed, STAs can disconnect the direct link through the TDLS teardown procedure.
- TDLS discovery (discovery) process.
- the TDLS initiator (TDLS initiator, referred to as the initiator) needs to obtain the information of the TDLS responder (TDLS responder, referred to as the responder) through the TDLS discovery process.
- the responder TDLS responder
- Step 1 The initiator sends a channel direct link establishment discovery request (TDLS discovery request) frame.
- the TDLS discovery request frame carries the relevant information of the initiator and the link identifier information element (Link Identifier element).
- the Link Identifier element uses To carry the relevant information of the direct link, including the address of the initiator, the address of the responder and the BSSID.
- the BSSID is the identifier of the BSS where the initiator and the responder are located. In other words, the initiator and the responder must be in the same BSS.
- the Link Identifer element includes:
- Element ID field occupying 1 byte; Length field, occupying 1 byte; Basic Service Set Identification (BSSID) field, occupying 6 bytes; TDLS initiator The TDLS initiator STA Address field occupies 6 bytes; the TDLS response STA Address field occupies 6 bytes.
- BSSID Basic Service Set Identification
- the initiator can send the TDLS discovery request frame to the responder through the AP.
- the initiator sends the first frame to the AP, and the first frame includes the TDLS discovery request frame; it also includes the AP sending the second frame to the responder, and the second frame includes The TDLS discovery request frame.
- the frame structure of the data frame carrying the TDLS discovery request frame sent by the initiator to the AP is shown in Figure 2b. Include the following information:
- Frame Control Duration, Address 1, Address 2, Address 3, Sequence Control, Address 4, Quality of Service Control (quality ofservice contr, QoS Control), high throughput control (high throughput contr, HT Control), frame body (Frame Body), frame check sequence (frame check sequence, FCS).
- Address 1 represents the address of the receiver (RA, receiver address); Address 2 represents the address of the sender (TA, transmitter address); Address 3 depends on the values of the To DS and From DS fields in the Frame Control.
- the Address 3 field indicates the destination address (destination address, DA).
- the Address 3 field indicates the source address (source address, SA).
- the initiator Before the TDLS discovery process, the initiator can obtain the MAC address of the responder through the ARP protocol or the proxy ARP protocol, so as to set the destination address field (DA) of the first frame as the MAC address of the responder. After receiving the first frame, the AP will forward the data frame. That is, another data frame is generated and sent to the second STA.
- ARP protocol or the proxy ARP protocol
- the frame structure of the link identification information element carried in the "Frame Body” can refer to the implementation process shown in Figure 2a above.
- the frame format shown in Figure 2b can also be applied to other communication scenarios besides TDLS, such as the sending and receiving scenario of an association request frame (or an association response frame), the re-association request frame (or a re-association response frame) Sending and receiving scenarios, or other scenarios, are not limited here.
- Step 2 The responder sends the channel direct link establishment discovery response (TDLS discovery response) frame to the initiator, the TDLS discovery response frame carries the relevant information of the responder, and also includes the Link Identifier element, the contents of the Link Identifer element It is the same as the content of the Link Identifier element in the TDLS discovery request frame. It should be noted that if the value of the BSSID in the Link Identifier element in the TDLS discovery request received by the responder is different from the value of the BSSID of the associated BSS, the TDLS discovery response frame will not be replied.
- TDLS establishment (setup) process The initiator needs to establish a direct link with the responder through the TDLS establishment process, including:
- Step 1 The initiator sends a channel direct link establishment request (TDLS setup request) frame.
- the TDLS setup request frame includes the relevant information of the initiator and the information related to the key generation, which is recorded as the channel direct link establishment peer-to-peer Key handshake message 1 (TPK Handshake Message 1).
- the process of the initiator sending the TDLS setup request frame may include the initiator sending the third frame to the AP, the third frame including the TDLS setup request frame; it may also include the AP sending the fourth frame to the responder, the first frame Four frames include the TDLS setup request frame.
- Step 2 Response frame sends channel direct link establishment response (TDLS setup response) frame, the TDLS setup response frame includes relevant information of the response frame, and related information generated with the secret key, recorded as channel direct link establishment peer-to-peer Key handshake message 2 (TPK Handshake Message 2).
- TDLS setup response channel direct link establishment response
- TPK Handshake Message 2 channel direct link establishment peer-to-peer Key handshake message 2
- the process of the responder sending the TDLS setup response frame may include the responder sending the fifth frame to the AP, the fifth frame including the TDLS setup response frame; it may also include the AP sending the sixth frame to the responder, the fifth frame Six frames include the TDLS setup response frame.
- Step 3 The initiator sends a TDLS setup confirm (TDLS setup confirm) frame.
- the TDLS setup confirm frame includes information about the initiator and information related to key generation, and the channel direct link establishes peer-to-peer key handshake message 3 (TPK Handshake Message 3).
- the process for the initiator to send the TDLS setup confirm frame may include the initiator sending the seventh frame to the AP, the seventh frame including the TDLS setup confirm frame; it may also include the AP sending the eighth frame to the responder, the first Eight frames include the TDLS setup confirm frame.
- TPK Handshake Message 1 TPK Handshake Message 2
- TPK Handshake Message 3 all include robust security network element (robust security network element, RSNE) information element and fast basic service set transition element (fast BSS Transition element, FTE) information element .
- robust security network element robust security network element, RSNE
- fast basic service set transition element fast BSS Transition element, FTE
- RSNE information elements include:
- the Element ID field occupies 1 byte; the Length field occupies 1 byte; the Vision field occupies 2 bytes; the group data encryption suite (Group Data Cipher Suite) field, the number of bytes occupied is 0 or 4; Pairwise Cipher Suite Count field, the number of bytes occupied is 0 or 2; Pairwise Cipher Suite List (Pairwise Cipher Suite List) Field, the number of bytes occupied is 0 or (4*m, m is the number of paired cipher suites); also includes:
- Authentication and key management suite count (authentication and key management suite count, AKM Suite Count) field, the number of bytes occupied is 0 or 2; authentication and key management suite list (authentication and key management suite list, AKM Suite List) Field, the number of bytes occupied is 0 or (4*n, n is the number of authentication and key management suites); the robust security network element capability information (RSN Capabilities) field, the number of bytes occupied is 0 or 2;
- the pairwise master key identifier count (PMKID count) field occupies 0 or 2 bytes; the pairwise master key identifier list (PMKID List) field occupies The number of bytes is 0 or (16*s, s is the number of paired master key identifiers); the number of bytes occupied by the Group management Cipher Suite field is 0 or 4.
- the FTE information element includes:
- the Element ID field occupies 1 byte; the Length field occupies 1 byte; the message integrity code control (MIC Control) field occupies 1 byte is 2; the message integrity code (message integrity code, MIC) field, the number of bytes occupied is a variable (variable); the authenticator’s random number (authenticator nonce, ANonce) field, the number of bytes occupied is 32; the requester’s The random number (supplicant nonce, SNonce) field occupies 32 bytes; the optional parameter (OptionalParameter(s)) occupies variable bytes.
- MIC Control message integrity code control
- the current 802.11 standard supports multiple basic service set identifier set (multiple basic service set identifier set, multiple BSSID, can also be called multiple BSSID set) feature, its basic function is to form multiple virtual APs in one device to serve different types The STA. Multiple virtual APs can be managed together to save management overhead.
- the multi-BSSID set can be a combination of some cooperative APs, and all the cooperative APs use the same operation set, channel number, and antenna interface.
- a multi-BSSID set there is an AP corresponding to a transmitted BSSID (Transmitted BSSID), and other APs are APs corresponding to Nontransmitted BSSID (non-transmitted).
- the information of the multi-BSSID set (that is, the multi-BSSID element) is carried in the management frame (for example: beacon frame or probe response frame or neighbor report) sent by the Transmitted BSSID AP.
- the BSSID information of the AP with Nontransmitted BSSID is derived by receiving the above-mentioned beacon frame or probe response frame, or the Multiple BSSID element in the neighbor report.
- one physical AP can virtualize multiple logical APs, and each virtualized AP manages a BSS.
- Different virtualized APs generally have different SSIDs and permissions, such as security mechanisms or transmission opportunities, etc. .
- the multiple APs after virtualization there is a virtual AP whose BSSID is configured as a transmitted (Transmitted) BSSID.
- This virtual AP can be called a transmitted (Transmitted) AP.
- the BSSIDs of other virtual APs are configured as non-ttransmitted BSSIDs.
- a virtual AP may be referred to as a nonttransmitted AP.
- multiple APs in Multiple BSSID can also be understood as one AP device virtualizing multiple cooperative AP devices. Only APs whose BSSID is Transmitted BSSID can send beacon frames (beacon) and probe response frames (Probe Response), if the probe request frame (Probe Request) sent by STA is to an AP whose BSSID is Nontransmitted BSSID in the multi-BSSID set, At this time, the AP whose BSSID is the TransmittedBSSID needs to help respond to the probe response frame.
- the beacon frame sent by the AP whose BSSID is Transmitted BSSID includes the Multiple BSSID element, and other APs with Nontransmitted BSSID cannot send beacon frames.
- the multi-BSSID element is as shown in Table 1, including element ID, length, maximum BSSID indication, and sub-elements.
- the value (n) of the maximum BSSID indication field is used to calculate the maximum number of BSSIDs contained in the above multi-BSSID set is 2 ⁇ n (ie 2 to the nth power), and the optional sub-elements include information about each non-transmission BSSID .
- the receiving end can calculate the value of each BSSID in the multi-BSSID set according to the reference BSSID, the maximum BSSID indication, and the serial number of the BSSID.
- Each BSSID includes 48 bits, and the value of the upper (48-n) bits of each BSSID in the multi-BSSID set
- the value of the upper 48-n bits of the reference BSSID is the same as that of the lower n bits of each BSSID in the multi-BSSID set.
- NontransmittedBSSIDprofile not expandable 1-220 reserve the 221 Manufacturer Proprietary Vendor definition 222-255 reserve the
- the nontransmitted BSSID profile includes one or more APs with Nontransmitted BSSID or elements of a directional multi-gigabit station (directional multi-gigabit station, DMG STA) .
- ARP Address resolution protocol
- the address resolution protocol is a transmission control protocol (transmission control protocol, TCP) TCP/Internet protocol (internet protocol, IP) that obtains a physical address based on an IP address.
- TCP transmission control protocol
- IP Internet protocol
- the host When the host sends information, it broadcasts the ARP request containing the target IP address to all hosts on the LAN, and receives the return message to determine the physical address of the target; after receiving the return message, store the IP address and physical address in the machine In the ARP cache and keep it for a certain period of time, the next request will directly query the ARP cache to save resources.
- proxy ARP Proxy ARP
- It is generally used by devices such as routers to replace hosts in another network segment to answer the network
- the ARP request of the segment host For example, host 1 (address 192.168.20.66/24) needs to send a message to host 2 (address 192.168.20.20/24), because host 1 does not know the existence of the subnet and host 1 does not know host 1 and host 2
- host 1 will send an ARP protocol request broadcast message to request the MAC address of 192.168.20.20.
- the router will recognize that the destination address of the message belongs to another subnet, so the router replies to host 1 with the router's MAC address. After that, host 1 sends all data packets destined for host 2 to the MAC address of the router, and the router forwards the data packets to host 2.
- the proxy ARP protocol makes the subnetted network topology transparent to the host (or, the router uses the MAC address of the router as the MAC address of PC2 to communicate with host 1; or, the router uses a false MAC address of host 2 Spoofed the host 1).
- a BSS in a multi-BSSID set, includes an AP and several STAs, and several STAs connected to the AP can communicate through TDLS.
- the TDLS radio frames sent and received need to carry the BSSID corresponding to the BSS.
- STA1 is associated with AP1 and STA2 is associated with AP2. Since AP1 and AP2 are in the same Multiple BSSID set (Same Multiple BSSID set), the BSSID corresponding to STA1 is the same as the BSSID corresponding to STA2, so that STA1 and STA2 can communicate Communication based on TDLS.
- Multiple BSSID set Shorte Multiple BSSID set
- the MLD implementation scenario shown in FIG. 5b is taken as an example.
- STA11 is associated with AP11 and STA12 is associated with AP12
- STA21 is associated with AP21 and STA22 is associated with AP22.
- AP11 and AP21 are in the same multiple BSSID set 1 (Same Multiple BSSID set 1)
- AP12 and AP22 are in the same multiple BSSID set 2 (Same Multiple BSSID set 2). Therefore, the BSSID corresponding to STA11 is the same as the BSSID corresponding to STA21, so that communication between STA11 and STA21 can be based on TDLS.
- the BSSID corresponding to STA12 is the same as the BSSID corresponding to STA22, so that communication between STA12 and STA22 can be based on TDLS.
- the STA can determine that the STA and the sender of the TDLS wireless frame It does not belong to the same BSS, and will not reply (or respond) to the TDLS radio frame. In other words, the TDLS direct link can only be established between sites within the same BSS. If two STAs belong to different BSSs, the two STAs cannot communicate based on TDLS.
- different APs in the same multi-BSSID set use the same communication parameters (such as operation set, channel number, antenna port, etc.), making it possible for STAs associated with different APs in the same multi-BSSID set Communication based on TDLS is required.
- the BSSIDs of the BSSs where STAs under different APs belong may be different, resulting in different APs associated in the same multi-BSSID set. STAs under the AP cannot communicate based on TDLS.
- FIG. 6 is a schematic diagram of a transmission method applied to TDLS provided by this application, and the method includes the following steps.
- the first STA sends a first wireless frame.
- the first STA sends the first wireless frame in step S101, and correspondingly, the second STA receives the first wireless frame in step S101.
- the first wireless frame includes the address information of the initiator, the address information of the responder and the first BSSID, and the first BSSID is a BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the initiator is the first STA, and the responder is the second STA; or, the initiator is the first multi-link device MLD where the first STA is located, and the responder is the The second STA; or, the initiator is the first STA, and the responder is the second MLD where the second STA is located; or, the initiator is the first MLD where the first STA is located, and the responder is the The second MLD where the second STA is located.
- the initiator indicated by the initiator address information carried in the first wireless frame may specifically be the first STA or the first MLD where the first STA is located.
- the responder indicated by the address information of the responder carried in a radio frame may specifically be the second STA or the second MLD where the second STA is located.
- the first BSSID carried in the first radio frame may be implemented in any of the following ways, including:
- the first BSSID is the Transmitted BSSID in the multi-BSSID set; or,
- the first BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the first BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the first BSSID is any BSSID in the multi-BSSID set.
- the first STA may determine the first BSSID in a pre-configured manner (for example, in response to user input operations, pre-written by the first STA, etc.) before step S101, The first STA may also determine the first BSSID through AP configuration before step S101, or determine it in other ways, which is not limited here.
- the address information of the responder carried in the first wireless frame sent by the first STA in step S101 may have multiple implementations, for example, the address information of the responder may be the second STA (or the second STA The IP address information of the second STA where the second MLD), the address information of the responder may also be the MAC address information of the second STA (or the second MLD where the second STA is located), or other address information, which is not limited here .
- the implementation process is shown in FIG. 7a, and the address information of the responder is the MAC address information of the second STA as an example for illustration.
- the method before the first STA sends the first wireless frame in step S101, the method further includes: the first STA sends a third wireless frame to the AP associated with the first STA in step S201, the third wireless frame including the The IP address information of the second STA, and the inquiry frame is used to request the MAC address information of the second STA; the first STA receives in step S202 a response frame of the third wireless frame from the AP associated with the first STA, the The response frame of the third wireless frame includes the MAC address information of the second STA.
- the first STA may also request the MAC address of the second STA based on the third wireless frame carrying the IP address of the second STA, so as to determine the MAC address of the second STA through the response frame of the third wireless frame.
- the MAC address of the second STA carried in the first wireless frame.
- the AP is an AP associated with the first STA, and the BSS where the first STA is located and the BSS where the second STA is located belong to the same multi-BSSID set.
- the AP may set the BSS where the first STA resides and the BSS where the second STA resides on the same local area network (or the same subnet) in a preconfigured manner, so as to determine the MAC address of the second STA.
- the AP may interact with an AP associated with the second STA to determine the MAC address of the second STA.
- BSSs corresponding to different BSSIDs in the same Multiple BSSID set may be located in the same local area network, or may be located in different local area networks. If it is under a different LAN, the current proxy ARP protocol will return the MAC address of the AP. At this time, the TDLS initiator (that is, the first STA) will set the value of the address information of the second STA in the first wireless frame as the MAC address of the AP, which will cause the TDLS communication to fail. To solve this problem, one method is to configure the BSSs corresponding to different BSSIDs in the same Multiple BSSID set under the same LAN, or in the same subnet.
- Another method is that the AP stores the mapping relationship between the IP addresses and the MAC addresses of STAs under other BSSs in the same Multiple BSSID set. In this way, when the AP receives the ARP request from the initiator, it can report to the initiator (That is, the first STA) feeds back the correct MAC address of the responder (that is, the second STA).
- the first STA may determine the IP address of the second STA based on user input operations, and the first STA may also determine the IP address of the second STA based on AP configuration information/instructions, The first STA may also determine the IP address of the second STA based on scanning the two-dimensional code, and the first STA may also determine the IP address of the second STA in other ways, which are not limited here.
- the implementation process is shown in FIG. 7a, and the first BSSID is the BSSID corresponding to the BSS where the second STA is located as an example for illustration.
- the method further includes: the first STA associates with the first STA in step S203
- the AP sends a fourth wireless frame, the fourth wireless frame includes the address information of the second STA, and the inquiry frame is used to request the BSSID corresponding to the BSS where the second STA is located;
- the first BSSID carried in the first radio frame may be the BSSID corresponding to the BSS where the second STA is located. Therefore, before the first STA sends the first wireless frame in step S101, the first STA may also request the BSSID corresponding to the BSS where the second STA is located based on the fourth wireless frame carrying the address information of the second STA, so as to pass through the fourth wireless frame. The response frame of the frame determines the BSSID corresponding to the BSS where the second STA is located carried in the first radio frame.
- the first STA and the second STA belong to different MLDs respectively.
- the first STA and the second STA belong to different MLDs respectively, so as to implement communication based on TDLS between multiple STAs associated in different MLDs in the same multi-BSSID set.
- the first STA and the second STA belong to the same MLD.
- the first STA and the second STA belong to the same MLD, so that multiple STAs associated in the same MLD in the same multi-BSSID set can communicate based on TDLS.
- the first wireless frame in step S101, includes a link identifier information (Link Identifier element, LIE) element, and the link identifier information element includes The address information of the initiator, the address information of the responder and the first BSSID, wherein the address information of the initiator is the MAC address information of the first STA.
- LIE Link Identifier element
- the first STA is a single-link device.
- the recipient of the first wireless frame may receive and obtain the MAC address information of the first STA based on the link identification information element. Therefore, the receiver of the first wireless frame can receive the MAC address information of the first STA in the location of the link identification information element in the first wireless frame, and the receiver of the subsequent first wireless frame can obtain the MAC address information based on the first STA's MAC address information is communicated with the first STA.
- the first STA is an STA in the multi-link device.
- the wireless frame transmitted based on TDLS communication may carry the link identification information element as shown in Figure 2a.
- the TDLS-based communication process does not involve multi-link communication scenarios, that is, when a STA is a single-link device, when the STA sends a wireless frame, it can use the "TDLS Initiator Site Address" shown in Figure 2a
- the value of this field is set to the MAC address information of the STA to indicate that the STA is the TDLS initiator in the TDLS communication process.
- the STA can perform the communication process shown in Figure 6, that is, the The first radio frame sent by the STA (that is, the first STA) carries a multilink element used to indicate the multilink information of the MLD where the STA is located.
- the first wireless frame sent by the first STA in step S101 is taken as an example to illustrate the TDLS discovery request frame transmitted during the TDLS communication process.
- the value of the TDLS initiator STA Address field of the link identification information element may be the MLD MAC address of the first MLD. This setting is to make the SA value of the data frame forwarded by the AP to the second STA consistent with the MLD MAC address of the first MLD, so that when the second STA receives the forwarded data frame, no matter according to the SA, Still according to TDLS initiator STAAddress, a consistent initiator address can be obtained to avoid confusion.
- the TDLS discovery request frame may be wrapped in a certain data frame (denoted as the first data frame) sent by the first STA to the AP associated with the first STA, wherein the frame format of the first data frame may refer to FIG. 5a shown.
- Figure 5a describes in detail the information contained in the "Frame Body”.
- the TDLS discovery request frame can be specifically carried in the "Frame Body (Frame Body)", as shown in Figure 5a, the "Frame Body (Frame Body)” includes the following information:
- Address 1 of the first data frame is the MAC address of the AP
- Address 2 is the address of the first STA
- Address 3 is the MLD MAC address of the second MLD.
- the TDLS discovery request frame is forwarded by the AP, it is carried in another data frame (marked as the second data frame) and sent (the frame format of the second data frame can refer to FIG. 2b).
- the second data frame Address 1 of the second data frame is the MAC address of the second STA, and Address 2 is the MAC address of the AP (note: since it may be forwarded on other links, this address may be different from The MAC addresses of the APs in the first data frame are different), and Address 3 is the MLD MAC address of the first MLD.
- the second STA cannot obtain the MAC address of the first STA when receiving the second data frame, and thus cannot obtain the address information of the first STA during the TDLS discovery process.
- the MAC address of the first STA may be carried in the first data frame carrying the TDLS discovery request frame.
- the MAC address of the first STA may be carried in the multi-link element of the first data frame.
- the first radio frame in the first radio frame sent by the first STA in step S101, includes a link identification information element and a multi-link element;
- the link identification information element includes the initiation The address information of the responder, the address information of the responder and the first BSSID, wherein the address information of the initiator is the MAC address information of the first MLD where the first STA is located;
- the multi-link element includes the first STA MAC address information.
- the first radio frame sent by the first STA may further carry a multi-link element used to indicate the link information of the first MLD where the first STA is located.
- the address information of the initiator may be the MAC address information of the first MLD where the first STA is located, to indicate that the initiator of the TDLS is the first MLD, and subsequently the second
- the second STA (or the second MLD where the second STA is located) may implement a TDLS-based communication process with the first MLD based on the first radio frame.
- the multi-link element includes a common information field
- the MAC address information of the first STA is located in the common information (Common Info) field.
- the MAC address information of the first STA is located in the public information field of the first multi-link element included in the first wireless frame, so that the receiver of the first wireless frame can determine the first STA based on the public information field. STA MAC address information.
- the first radio frame includes a multi-link element, and the multi-link element includes a first field, where the first field is used to indicate whether the multi-link element includes the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame includes the MAC address information of the first STA.
- the sender of the first radio frame that is, the first STA
- the first field it is possible to carry the MAC address information of the first STA in the multi-link element, and make the indication of the first field applicable
- a communication scenario for example, a TDLS scenario
- the receiver of the first wireless frame needs to receive the MAC address information of the first STA.
- the receiver of the first wireless frame that is, the second STA
- the MAC address information of the first STA that is, the second STA can accurately obtain the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame does not include the MAC address information of the first STA.
- the MAC address information of the first STA is located in the first radio frame except the multi-link element In other positions, or, the first radio frame does not carry the MAC address information of the first STA.
- the first value is different from the second value.
- the sender of the first radio frame based on the first field, it is possible to flexibly set whether the multi-link element includes the MAC address information of the first STA in the multi-link element.
- the receiver of the first radio frame it is possible to flexibly select whether to receive the MAC address information of the first STA in the multi-link element based on the first field.
- the communication process shown in FIG. 6 can also be applied to communication scenarios other than TDLS between multi-link devices. It is possible that in this scenario, the receiver of the first wireless frame does not need to know (or In other positions other than the link element) the MAC address information of the first STA, such as the sending and receiving scene of the association request frame (or the association response frame), the sending and receiving scene of the re-association request frame (or the re-association response frame), or the Other scenarios are not limited here.
- the first wireless frame may carry the MAC address information of the first STA in the MAC Header field .
- the MAC address information of the first STA may be carried in the A2 field.
- the first field is used to indicate that the multi-link element does not include the MAC address information of the first STA, so that the receiver of the first wireless frame can receive the MAC address information of the first STA in the MAC Header field.
- the transmission of redundant data can be reduced to a certain extent, and communication efficiency can be improved.
- the receiver of the first wireless frame may not need to know the MAC address information of the first STA.
- the receiver of the first radio frame may only need part of the information in the multi-link element, and does not need to know the MAC address information of the first STA.
- the receiver of the first wireless frame needs to know the "MLD MAC address" of the MLD where the first STA is located in the frame format of the multi-link element shown in Figure 4, so that when communicating with the MLD, the first wireless frame The recipient of STA does not need to know the MAC address information of the first STA.
- the receiver of the first radio frame needs to know the "introduction 307 of each STA x" of other STAs in the MLD where the first STA is located in the frame format of the multi-link element shown in Figure 4, so as to realize communication with other STAs in the MLD.
- the receiver of the first wireless frame does not need to know the MAC address information of the first STA.
- the first radio frame further includes a target field, and when the first field is used to indicate that the multi-link element does not include the MAC address information of the first STA, the target field includes the MAC address of the first STA information; wherein the target field is different from the multilink element.
- the target field may be a medium access control header (medium access control header, MAC Header) field.
- medium access control header medium access control header, MAC Header
- the first radio frame includes any of the following:
- An association request frame a reassociation request frame, an association response frame, a reassociation response frame, or a probe response frame.
- the communication process corresponding to the implementation shown in FIG. Correlation process, detection process, etc.
- the first field is located in a Presence Bitmap (Presence Bitmap) field in the multilink element.
- the first field is located in the presence bitmap field of the multilink element included in the first radio frame, so that the receiver of the first radio frame can determine the first field based on the presence bitmap field.
- Presence Bitmap Presence Bitmap
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located, that is, the TDLS initiator and the TDLS responder respectively belong to BSSs corresponding to different BSSIDs in the same multi-BSSID set.
- Enable TDLS transmission between STAs in different BSSs by carrying the BSSID in the multi-BSSID set in the wireless frame, and implement TDLS-based TDLS transmission between multiple STAs in different BSSs associated in the same multi-BSSID set communication.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located, that is, the TDLS initiator and the TDLS responder belong to the BSS corresponding to the same BSSID in the same multi-BSSID set.
- the second STA sends a second radio frame.
- the second STA sends the second wireless frame in step S102, and correspondingly, the first STA receives the second wireless frame in step S102.
- step S101 when the first BSSID carried in the first wireless frame is a BSSID in the multi-BSSID set to which the BSS where the second STA belongs, the second STA It is determined that the first STA and the second STA belong to the same multi-BSSID set, therefore, the second STA can communicate with the first STA based on TDLS, and step S102 is performed.
- the second STA determines that the first STA and the second STA do not belong to the same In the multi-BSSID set, therefore, the second STA cannot communicate with the first STA based on TDLS, that is, step S102 is not performed.
- the receiver of the first wireless frame may be STA21 or STA22.
- STA21 determines that STA11 and STA21 are located in the same multiple BSSID set (Same Multiple BSSID set) based on the first BSSID carried in the first wireless frame, so that STA21 can act as the second STA and STA11 Communication based on TDLS.
- the second STA is STA22
- STA22 determines that STA11 and STA22 are not located in the same multi-BSSID set based on the first BSSID carried in the first wireless frame. Therefore, STA41 cannot act as the second STA and STA11 based on TDLS. communication.
- the second wireless frame in the second wireless frame sent by the second STA in step S102, includes a link identification information element, and the link identification information element includes the initiator's address information, address information of the responder and the second BSSID.
- the address information of the responder is MAC address information of the MAC of the second STA.
- the second STA is a single-link device.
- the recipient of the second wireless frame may receive and obtain the MAC address information of the second STA based on the link identification information element. Therefore, the receiver of the second wireless frame can receive the MAC address information of the second STA at the location of the link identification information element in the second wireless frame, and the receiver of the subsequent second wireless frame can obtain the MAC address information of the second STA based on the The MAC address information is communicated with the second STA.
- the second radio frame in the second radio frame sent by the second STA in step S102, includes a link identification information element and a multi-link element;
- the link identification information element includes the initiation The address information of the responder, the address information of the responder and the second BSSID, the address information of the responder is the MAC address information of the second MLD where the second STA is located;
- the multi-link element includes the MAC address information of the second STA Address information.
- the second STA is an STA in the multi-link device.
- the second radio frame sent by the second STA may further carry a multi-link element used to indicate the link information of the second MLD where the second STA is located.
- the address information of the responder in the transmission process applied to TDLS, may be the MAC address information of the second MLD where the second STA is located, to indicate that the responder of the TDLS is the second MLD, and subsequently the second MLD may be made
- a STA (or the first MLD where the first STA is located) may implement a TDLS-based communication process with the second MLD based on the second radio frame.
- the multi-link element includes a public information field, and the MAC address information of the second STA is located in the public information field.
- the MAC address information of the second STA is located in the public information field of the second multi-link element included in the second radio frame, so that the receiver of the second radio frame can determine the second STA based on the public information field MAC address information.
- the second radio frame includes a multi-link element, and the multi-link element includes a second field, where the second field is used to indicate whether the multi-link element includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame does not include the MAC address information of the second STA.
- the first value is different from the second value.
- the second field is located in the presence bitmap field in the multilink element.
- the first field is located in the presence bitmap field of the multilink element included in the first radio frame, so that the receiver of the first radio frame can determine the first field based on the presence bitmap field.
- the first radio frame sent by the first STA in step S101 is a TDLS discovery request frame and the second radio frame sent by the second STA in step S102 is a TDLS discovery response frame; or,
- the first radio frame sent by a STA in step S101 is a TDLS setup request frame and the second radio frame sent by a second STA in step S102 is a TDLS setup response frame.
- the method can be applied to various communication processes of TDLS.
- the method is applied to the TDLS discovery process; the first radio frame is a TDLS establishment request frame and the second radio frame is When the TDLS establishes a response frame, this method is applied to the TDLS establishment process.
- the first radio frame includes a first information element, and the first information element includes address information of the initiator, address information of the responder, and the first BSSID; the second radio frame includes a second information element, And the second information element includes address information of the initiator, address information of the responder, and a second BSSID; wherein, the multi-BSSID set includes the second BSSID.
- the first information element is a link identifier information element (Link Identifier element).
- the second information element is a link identifier information element (Link Identifier element).
- the address information of the initiator, the address information of the responder and the first BSSID may be included in the first information element in the first radio frame, for example
- the first information element is included in the TDLS discovery request frame or the first information element is included in the TDLS setup request frame.
- the second radio frame may also carry a second information element for carrying the address information of the initiator, the address information of the responder, and the second BSSID, for example, the second information element is included in a TDLS Discovery Response frame or the second information element is included in a TDLS Setup Response frame.
- the second BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs, so that when the BSSs where different STAs are located belong to the same multi-BSSID set, different STAs pass the response frame in the wireless frame TDLS transmission (including TDLS discovery and/or TDLS establishment, etc.) is realized by carrying the BSSID in the multi-BSSID set, so that different STAs associated in the same multi-BSSID set can communicate based on TDLS.
- the second BSSID satisfies any of the following:
- the second BSSID is the transmitted basic service set identifier (Transmitted BSSID) in the multi-BSSID set; or,
- the second BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the second BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the second BSSID is any BSSID in the multi-BSSID set.
- the first BSSID is the same as the second BSSID.
- the first BSSID carried by the first wireless frame and the second BSSID carried by the second wireless frame may be the same BSSID, that is, the receiver of the first wireless frame receives the first wireless frame carrying the first BSSID.
- the second BSSID same as the first BSSID is carried in the response frame of the first wireless frame. While reducing the implementation complexity of the second wireless frame, it is also convenient for the sender of the first wireless frame to determine the second wireless frame as a response frame of the first wireless frame based on the same BSSID.
- the first BSSID is different from the second BSSID.
- the first BSSID carried by the first wireless frame and the second BSSID carried by the second wireless frame may be different BSSIDs, that is, the receiver of the first wireless frame receives the first wireless frame carrying the first BSSID.
- the second BSSID different from the first BSSID is carried in the response frame of the first wireless frame.
- the receiver of the first wireless frame does not need to be limited by the setting of the BSSID carried in the first wireless frame, and the implementation flexibility of the second wireless frame is improved.
- the first radio frame is a TDLS establishment confirmation frame and the second radio frame is a first confirmation frame; or, the first radio frame is a TDLS data frame and the second radio frame is a first radio frame Two confirmation frames.
- the method can be applied to various communication processes of TDLS. Wherein, when the first wireless frame is a TDLS establishment confirmation (confirm) frame and the second wireless frame is a first confirmation frame, this process may be called a TDLS authentication process; the first wireless frame is a TDLS data frame and the second When the wireless frame is the second acknowledgment frame, this process may be referred to as a TDLS data frame transmission process.
- the first acknowledgment frame may be an acknowledgment (acknowledge, ACK) frame
- the second acknowledgment frame may be a block acknowledgment (block acknowledgment, Block ACK, BA for short) frame.
- the first wireless frame sent by the first STA in step S101 further includes a TPK Handshake Message, where the TPK Handshake Message is used to carry parameters required for generating the TPK, and the parameters include the first BSSID.
- the first radio frame also includes parameters required by the TPK, and the parameters include the first BSSID.
- TPK is the secret key used for TDLS communication, so that the secret key is generated based on the first BSSID (or second BSSID), which provides the communication between different STAs associated in the same multi-BSSID set based on TDLS. How to generate the secret key.
- the communication process involved in FIG. 6 and FIG. 7a may be a TDLS communication process.
- the first radio frame is a TDLS discovery request frame and the second radio frame is a TDLS discovery response frame.
- the first radio frame is a TDLS establishment request frame and the second radio frame is a TDLS establishment response frame.
- the first radio frame is a TDLS setup confirmation frame and the second radio frame is the first confirmation frame.
- the first radio frame is a TDLS data frame and the second radio frame is a second confirmation frame.
- the frame structure of the first radio frame (for example, when the first radio frame is a TDLS discovery request frame, a TDLS establishment request frame, a TDLS establishment response frame, a TDLS establishment confirmation frame, or a TDLS data frame) is as shown in FIG. 2b . Include the following information:
- Frame Control Duration, Address 1, Address 2, Address 3, Sequence Control, Address 4, Quality of Service Control (quality of service contr, QoS Control), high throughput control (high throughput contr, HT Control), frame body (Frame Body), frame check sequence (frame check sequence, FCS).
- Address 1 represents the address of the receiver (RA, receiver address); Address 2 represents the address of the sender (TA, transmitter address); Address 3 depends on the values of the To DS and From DS fields in the Frame Control.
- the frame structure of the first radio frame (for example, when the first radio frame is a TDLS discovery request frame, a TDLS establishment request frame, a TDLS establishment response frame, a TDLS establishment confirmation frame, or a TDLS data frame) is shown in FIG. 5c Show.
- Figure 5c describes in detail the information contained in the "Frame Body".
- the TDLS discovery request frame can be specifically carried in the "Frame Body (Frame Body)", as shown in Figure 5c, the "Frame Body (Frame Body)" includes the following information:
- the "Frame Body (Frame Body)" does not include a multi-link element.
- the frame structure of the first radio frame (for example, when the first radio frame is a TDLS discovery response frame) is as shown in FIG. 5d.
- Figure 5d can omit some information, for example, omit the following information:
- Address 4 Address 4
- service quality control quality of service contr, QoS Control
- the first STA may send and receive the first wireless frame and the second wireless frame on the communication link with the second STA; the first STA may also be associated with the first STA On the communication link between the APs, the first wireless frame and the second wireless frame are sent and received.
- the first wireless frame and the second wireless frame are sent and received.
- the first wireless frame includes a TDLS discovery request frame, a TDLS establishment request frame, or a TDLS establishment confirmation frame; the first STA (in step S101 shown in FIG. 6 or in step S101 shown in FIG.
- sending the first wireless frame includes: the first STA sends the first wireless frame to the first access point AP associated with the first STA, and the first wireless frame further includes an address one (Adrress 1, A1) field , address two (Adrress 2, A2) field and address three (Adrress3, A3) field; Wherein, the value of this A1 field is the address information of this first AP, the value of this A2 field is the address of this first STA information, the value of the A3 field is the address information of the responder.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS discovery process, a TDLS establishment process, etc.
- the first radio frame specifically includes (or is expressed as a bearer) TDLS discovery request frame, TDLS establishment request frame or TDLS establishment confirmation frame.
- the first STA may send the first wireless frame to the first AP associated with the first STA.
- the first radio frame further includes an A1 field for indicating a receiver address (RA) of the first radio frame, for indicating an address (transmitter address, TA) of a sender of the first radio frame
- the A2 field is used to indicate the A3 field of the destination address (DA) of the first radio frame.
- the first wireless frame is a TDLS data frame; sending the first wireless frame by the first STA (in step S101 shown in FIG. 6 or step S101 shown in FIG. 7a ) includes: the first STA A STA sends the first wireless frame to the second STA, and the first wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the responder, and the value of the A2 field is The value is the address information of the first STA, and the value of the A3 field is the MAC address of BSSID or AP MLD.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS data transmission process, that is, the first radio frame is a TDLS data frame.
- the first STA may specifically send the first wireless frame to the second STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the second radio frame is a TDLS setup response frame; receiving the second radio frame by the first STA (in step S102 shown in FIG. 6 or step S102 shown in FIG. 7a ) includes: the The first STA receives the second wireless frame from the first AP associated with the first STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the first Address information of the STA, the value of the A2 field is the address information of the first AP, and the value of the A3 field is the address information of the responder.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS establishment process, etc.
- the second radio frame is specifically a TDLS establishment response frame.
- the first STA may receive the second wireless frame sent from the first AP associated with the first STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the second radio frame includes a TDLS discovery response frame, a TDLS setup confirmation frame response frame or a TDLS data frame response frame;
- the first STA (in step S102 shown in FIG. 6 or in FIG. 7a In the shown step S102) receiving the second wireless frame includes: the first STA receiving the second wireless frame from the second STA, wherein the second wireless frame includes an A1 field, an A2 field and an A3 field; wherein, The value of the A1 field is the address information of the initiator, the value of the A2 field is the address information of the second STA, and the value of the A3 field is the MAC address information of the BSSID or AP MLD.
- the method shown in FIG. 6 or FIG. 7a can be applied to various TDLS transmission processes, such as TDLS discovery process, TDLS establishment process, TDLS data transmission process, etc.
- the second radio frame specifically includes (or is expressed as a bearer) TDLS Discovery Response Frame, Response Frame for TDLS Setup Acknowledgment Frame, or Response Frame for TDLS Data Frame.
- the first STA may receive the second radio frame sent by the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the first wireless frame includes a TDLS discovery request frame, a TDLS establishment request frame, or a TDLS establishment confirmation frame;
- the second STA (in step S101 shown in FIG. 6 or in step S101 shown in FIG. 7a ) receiving the first wireless frame includes: the second STA receiving the first wireless frame from a second AP associated with the second STA, and the first wireless frame further includes an A1 field, an A2 field, and an A3 field; wherein, the The value of the A1 field is the address information of the second STA, the value of the A2 field is the address information of the second AP, and the value of the A3 field is the address information of the initiator.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS discovery process, a TDLS establishment process, etc.
- the first radio frame specifically includes (or is expressed as a bearer) TDLS discovery request frame, TDLS establishment request frame or TDLS establishment confirmation frame.
- the second STA may receive the first wireless frame sent from the second AP associated with the second STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the first wireless frame is a TDLS data frame; receiving the first wireless frame by the second STA includes: the second STA (in step S101 shown in FIG. 6 or in step S101 shown in FIG. 7a Middle) receiving the first wireless frame from the first STA, the first wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the second STA, and the A2 field The value of the A3 field is the address information of the initiator, and the value of the A3 field is the BSSID or the MAC address information of the AP MLD.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS data transmission process, that is, the first radio frame is a TDLS data frame.
- the second STA may specifically receive the first radio frame sent from the first STA.
- the first radio frame further includes an A1 field used to indicate the RA of the first radio frame, an A2 field used to indicate the TA of the first radio frame, and an A3 field used to indicate the DA of the first radio frame.
- the second radio frame is a TDLS setup response frame; sending the second radio frame by the second STA (in step S102 shown in FIG. 6 or step S102 shown in FIG. 7a ) includes: the The first STA sends the second wireless frame to the second AP associated with the second STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the second AP
- the value of the A2 field is the address information of the second STA, and the value of the A3 field is the address information of the initiator.
- the method shown in FIG. 6 or FIG. 7a can be applied to various transmission processes of TDLS, such as a TDLS establishment process, etc.
- the second radio frame is specifically a TDLS establishment response frame.
- the second STA may specifically send the second wireless frame to the second AP associated with the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the second radio frame includes a TDLS discovery response frame, a TDLS setup confirmation frame response frame, or a TDLS data frame response frame;
- sending the second wireless frame includes: the second STA sending the second wireless frame to the first STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the The value of the A1 field is the address information of the initiator, the value of the A2 field is the address information of the second STA, and the value of the A3 field is the MAC address information of the BSSID or AP MLD.
- the method shown in FIG. 6 or FIG. 7a can be applied to various TDLS transmission processes, such as TDLS discovery process, TDLS establishment process, TDLS data transmission process, etc.
- the second radio frame specifically includes (or is expressed as a bearer) TDLS Discovery Response Frame, Response Frame for TDLS Setup Acknowledgment Frame, or Response Frame for TDLS Data Frame.
- the second STA may specifically send the second radio frame to the second STA associated with the second STA.
- the second radio frame further includes an A1 field used to indicate the RA of the second radio frame, an A2 field used to indicate the TA of the second radio frame, and an A3 field used to indicate the DA of the second radio frame.
- the responder is the second STA or the second MLD where the second STA is located.
- the responder indicated by the address information of the responder contained in the first radio frame (or the second radio frame) may be the second STA or the second STA.
- the responder in the TDLS communication link may be the second STA or the second MLD where the second STA is located.
- the initiator is the first STA or the first MLD where the first STA is located.
- the initiator indicated by the address information of the initiator contained in the first wireless frame (or the second wireless frame) may be the first STA or the first STA where the first STA is located.
- the responder in the TDLS communication link may be the first STA or the first MLD where the first STA is located.
- step S101 and step S102 can be applied to various communication processes of TDLS.
- the implementation process shown in Fig. 7b is taken as an example.
- the implementation method shown in Figure 6 is applied to the TDLS transmission process.
- the execution subjects in the TDLS transmission process can be called TDLS initiator (TDLS initiator) and TDLS responder (TDLS responder).
- the sender of the first wireless frame ie, the first STA
- the TDLS initiator referred to as the initiator for short
- the receiver of the first wireless frame ie, the second STA
- the TDLS responder referred to as the responder for short
- the first radio frame and the second radio frame are respectively a TDLS discovery request frame and a TDLS discovery response frame in a TDLS discovery (discovery) process.
- the TDLS discovery request frame ie TDLS discovery request frame
- TDLS discovery response frame shown in FIG. Frame (ie TDLS discovery response frame) interaction process implementation.
- the initiator since the initiator may be located in the same BSS as the responder, or may be located in different BSSs in the same Multiple BSSID set as the initiator, the initiator sends the TDLS discovery request frame Sometimes, it may need to be sent multiple times. Each time a TDLS discovery request frame is sent, the values of the BSSID field in the Link Identifier element carried are different BSSIDs in the same Multiple BSSID set.
- the initiator can preferentially set the value of the BSSID field in the Link Identifier element to any BSSID in the multi-BSSID set where the initiator is located; or, the initiator can set the value of the BSSID field in the Link Identifier element to The Transmitted BSSID in the Multiple BSSID set, and then try to set it to other BSSIDs in the Multiple BSSID set until the initiator receives the TDLS discovery response frame from the responder.
- the initiator can preferentially set the value of the BSSID field in the Link Identifier element to the BSSID of the BSS where the initiator is located.
- the initiator may send an inquiry frame to the AP for inquiring about the BSSID of the BSS where the responder is located, and the inquiry frame shall carry the identifier of the responder, which may be the MAC address of the responder ( or MLD MAC address) or IP address, etc.
- the AP can send a response frame to the initiator, carrying the BSSID of the BSS where the responder is located.
- step S302 when the responder receives the TDLS discovery request frame, if the value of the BSSID field in the Link Identifier element is found to be the same as the value of the Transmitted BSSID in the Multiple BSSID set where the BSS is located, it will send a message to the initiator Send TDLS discovery response frame.
- the TDLS discovery response frame carries a Link Identifier element, and the value of the BSSID field in it is set to the value of the Transmitted BSSID.
- the TDLS discovery response frame is a Public Action frame, and the value of its address 3 (address 3, A3) field (or called BSSID field) is set to the value of the Transmitted BSSID, or is set to a wildcard (wildcard) BSSID, Among them, the wildcard BSSID can be implemented with a value of "all 1", indicating that all STAs must receive it.
- the responder when it receives the TDLS discovery request frame, if it finds that the value of the BSSID field in the Link Identifier element is the same as the value of any BSSID in the Multiple BSSID set where the BSS is located, it will send a TDLS discovery request to the initiator response frame.
- the TDLS discovery response frame carries a Link Identifier element, and the value of the BSSID field therein is set to the value of the BSSID field in the Link Identifier element of the TDLS discovery request frame.
- the value of the A3 field of the TDLS discovery response frame is also set to the value of the BSSID field in the Link Identifier element in the TDLS discovery request frame.
- the first wireless frame and the second wireless frame are respectively a TDLS setup request frame and a TDLS setup response frame in the TDLS setup (setup) process.
- the TDLS establishment request frame ie TDLS setup request frame
- the TDLS establishment response in step S303 and step S304 shown in FIG. Frame (ie TDLS setup response frame) interactive process implementation.
- step S303 when the initiator sends the TDLS setup request frame, it should set the BSSID field in the Link Identifier element in the TDLS setup request frame to the BSSID field in the Link Identifier element in the TDLS discovery response frame received earlier.
- the value of the BSSID field when the initiator sends the TDLS setup request frame, it should set the BSSID field in the Link Identifier element in the TDLS setup request frame to the BSSID field in the Link Identifier element in the TDLS discovery response frame received earlier. The value of the BSSID field.
- the responder receives the TDLS setup request frame, and if the value of the BSSID field in the Link Identifier element is found to be the same as the value of the Transmitted BSSID in the Multiple BSSID set where the BSS is located, the responder sends TDLS setup response frame. Further, the TDLS setup response frame carries a Link Identifier element, and the value of the BSSID field therein is set to the value of the Transmitted BSSID.
- the responder when it receives the TDLS setup request frame, if it finds that the value of the BSSID field in the Link Identifier element is the same as any BSSID in the Multiple BSSID set where the BSS is located, it will send a TDLS setup response to the initiator frame. Further, the TDLS setup response frame carries a Link Identifier element, and the value of the BSSID field therein is set as the value of the BSSID field in the Link Identifier element in the TDLS setup request frame.
- the first radio frame and the second radio frame are respectively the TDLS setup confirm frame and the first confirmation frame corresponding to the TDLS setup confirm frame in the TDLS setup (setup) process.
- the TDLS establishment confirmation frame ie TDLS setup confirm frame
- the first confirmation frame in step S305 and step S306 shown in FIG.
- the interactive process of the frame is realized.
- step S305 when the initiator sends the TDLS setup confirm frame, it should set the BSSID field in the Link Identifier element in the TDLS setup confirm frame to the previously received TDLS setup response frame (or TDLS setup request frame) The value of the BSSID field in the Link Identifier element in .
- the responder may send a first response frame corresponding to the TDLS setup confirm frame, wherein the first response frame may be an ACK frame.
- the first radio frame and the second radio frame are respectively a TDLS data frame after a TDLS setup process and a second confirmation frame corresponding to the TDLS data frame.
- the TDLS data frame ie TDLS setup confirm frame
- the second confirmation frame in step S307 and step S308 shown in Figure 7b can The interactive process is realized.
- step S307 after the TDLS direct link is established, data transmission can be performed between the initiator and the responder.
- the A3 field of the data frame can be set as the value of the BSSID field in the Link Identifier element.
- step S308 if the responder receives the data frame, it finds that the value of the A3 field of the data frame is the Link in the TDLS setup request frame (or TDLS setup response frame, or TDLS setup confirm frame) in the TDLS setup process. Identifier element in the value of the BSSID field, continue to receive the data frame.
- the responder may also send a second response frame, where the second response frame is an ACK frame or a BA frame.
- a TPK Handshake Message may also be carried, and the TPK Handshake Message is used to carry parameters required for generating the TPK, and the parameters include at least one of the first BSSID, the second BSSID and the Transmitted BSSID .
- TPK meets:
- TPK KDF-Hash-Length(A)
- parameter A satisfies:
- parameter A satisfies:
- TPK-Key-Input Hash(min(SNonce,ANonce)
- ANonce is the authenticator's random number and “SNonce” is the requester's random number, both of which are included in the FTE information element;
- MAC_I indicates the MAC address information of the first STA;
- MAC_R indicates the MAC of the second STA Address information;
- BSSID indicates the first BSSID, and
- Transmitted BSSID indicates the Transmitted BSSID in the multi-BSSID set where the first STA is located;
- KDF-Hash-Length indicates the key generation function, see standard document 802.11-2020 for details.
- min(MAC_I, MAC_R) means to take the minimum value of MAC_I and MAC_R;
- maximum(MAC_I, MAC_R) means to take the maximum value of MAC_I and MAC_R;
- min(SNonce,ANonce) means to take the minimum value of SNonce and ANonce
- maximum(SNonce,ANonce) means to take the minimum value of SNonce and ANonce
- the BSSID used is the value of the BSSID field in the Link Identifier element in the TDLS setup request/response/confirm frame during the TDLS establishment process of the aforementioned implementation mode 2 or implementation mode 3. It can be the value of the Transmitted BSSID in the Multiple BSSID set to which the BSS where the initiator (or responder) belongs, or the value of the BSSID of the BSS where the initiator (or responder) is located.
- step S307 and step S308 after the TDLS direct link is established, data transmission can be performed between the initiator and the responder.
- the A1 field of the data frame can be set as the MLD MAC address of the other party, and the A2 field can be set as its own MLD MAC address.
- the responder receives the data frame and finds that the value of the A1 field of the data frame is the value of its own MLD MAC address, it continues to receive the data frame.
- the first wireless frame sent by the first STA includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs. So that when the BSS where the first STA is located and the BSS where the second STA is located belong to the same multi-BSSID set, after the second STA receives the first radio frame, the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the communication device 800 may specifically be a TDLS transmission device.
- the communication device 800 includes a sending unit 801 and a receiving unit 802 .
- the sending unit 801 and the receiving unit 802 are used to perform the following process.
- the sending unit 801 is configured to send a first wireless frame, where the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSS where the first STA is located The BSSID in the multi-BSSID set to which the BSSID belongs;
- the receiving unit 802 is configured to receive a second wireless frame, where the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame sent by the sending unit 801 includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the second STA sends the first radio frame based on the first radio frame.
- the response frame of the frame that is, the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the initiator is the first STA, and the responder is the second STA; or, the initiator is the first multi-link device MLD where the first STA is located, and the responder is the The second STA; or, the initiator is the first STA, and the responder is the second MLD where the second STA is located; or, the initiator is the first MLD where the first STA is located, and the responder is the The second MLD where the second STA is located.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located.
- the first BSSID is the Transmitted BSSID in the multi-BSSID set; or,
- the first BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the first BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the first BSSID is any BSSID in the multi-BSSID set.
- the second radio frame includes address information of the initiator, address information of the responder, and a second BSSID; wherein, the multi-BSSID set includes the second BSSID.
- the second BSSID is the Transmitted BSSID of the transmitted basic service set identifier in the multi-BSSID set; or,
- the second BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the second BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the second BSSID is any BSSID in the multi-BSSID set.
- the first BSSID is the same as the second BSSID.
- the first BSSID is different from the second BSSID.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the first radio frame is a TDLS discovery request frame and the second radio frame is a TDLS discovery response frame; or,
- the first radio frame is a TDLS setup request frame and the second radio frame is a TDLS setup response frame; or,
- the first radio frame is a TDLS setup acknowledgment frame and the second radio frame is a first acknowledgment frame; or,
- the first wireless frame is a TDLS data frame and the second wireless frame is a second confirmation frame.
- the first acknowledgment frame may be an acknowledgment (acknowledge, ACK) frame
- the second acknowledgment frame may be a block acknowledgment (block acknowledgment, Block ACK, BA for short) frame or ACK frame.
- the first wireless frame includes a link identifier information (Link Identifier element, LIE) element, and the link identifier information element includes the address information of the initiator, the address information of the responder, and the The first BSSID, wherein the address information of the initiator is the MAC address information of the first STA.
- LIE Link Identifier element
- the first STA is a single-link device.
- the first radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the address information of the initiator, the address information of the responder, and the first BSSID, wherein, the address information of the initiator is the MAC address information of the first MLD where the first STA is located;
- the multi-link element includes the MAC address information of the first STA.
- the first STA is an STA in the multi-link device.
- the multi-link element includes a public information field, and the MAC address information of the first STA is located in the public information field.
- the first radio frame includes a multi-link element, and the multi-link element includes a first field, where the first field is used to indicate whether the multi-link element includes the MAC address of the first STA. Address information.
- the first field is used to indicate that the multi-link element in the first radio frame includes the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame does not include the MAC address information of the first STA.
- the first value is different from the second value.
- the first field is located in an appearance bitmap field in the multilink element.
- the second radio frame includes a link identification information element, where the link identification information element includes address information of the initiator, address information of the responder, and the second BSSID.
- the address information of the responder is MAC address information of the MAC of the second STA.
- the second STA is a single-link device.
- the second radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the address information of the initiator, the address information of the responder, and the second BSSID, the address information of the responder is the MAC address information of the second MLD where the second STA is located;
- the multi-link element includes the MAC address information of the second STA.
- the second STA is an STA in the multi-link device.
- the multi-link element includes a common information field, and the MAC address information of the second STA is located in the common information field.
- the second radio frame includes a multi-link element, and the multi-link element includes a second field, where the second field is used to indicate whether the multi-link element includes the MAC address of the second STA. Address information.
- the first field is used to indicate that the multi-link element in the second radio frame includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame does not include the MAC address information of the second STA.
- the first value is different from the second value.
- the second field is located in the presence bitmap field in the multilink element.
- the first radio frame includes a TDLS discovery request frame, a TDLS establishment request frame, or a TDLS establishment confirmation frame;
- the sending unit 801 sending the first radio frame includes: the sending unit 801 sending the first The first access point AP associated with the STA sends the first wireless frame, and the first wireless frame also includes an address one (Adrress 1, A1) field, an address two (Adrress 2, A2) field and an address three (Adrress 3, A3 ) field; wherein, the value of the A1 field is the address information of the first AP, the value of the A2 field is the address information of the first STA, and the value of the A3 field is the address information of the responder.
- the first wireless frame is a TDLS data frame;
- the sending unit 801 sending the first wireless frame includes: the sending unit 801 sending the first wireless frame to the second STA, and the first The wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the responder, the value of the A2 field is the address information of the first STA, and the value of the A3 field is BSSID or MAC address of the AP MLD.
- the second wireless frame is a TDLS establishment response frame;
- the receiving unit 802 receiving the second wireless frame includes: the receiving unit 802 receiving the second wireless frame from the first AP associated with the first STA Two wireless frames, wherein the second wireless frame includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the first STA, and the value of the A2 field is the address information of the first AP Address information, the value of the A3 field is the address information of the responder.
- the second wireless frame includes a TDLS discovery response frame, a TDLS setup confirmation frame response frame, or a TDLS data frame response frame;
- the receiving unit 802 receiving the second wireless frame includes: the receiving unit 802 Receive the second wireless frame from the second STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the address information of the originator, and the value of the A2 field The value is the address information of the second STA, and the value of the A3 field is the MAC address information of BSSID or AP MLD.
- the first wireless frame further includes a TPK Handshake Message, where the TPK Handshake Message is used to carry parameters required for generating the TPK, where the parameters include the first BSSID.
- the first STA and the second STA belong to different multi-link devices MLD respectively.
- the address information of the responder includes MAC address information of the second STA
- the sending unit 801 is further configured to send a third wireless frame, where the third wireless frame includes the IP address information of the second STA, and the inquiry frame is used to request the MAC address information of the second STA;
- the receiving unit 802 is further configured to receive a response frame of the third wireless frame, where the response frame of the third wireless frame includes the MAC address information of the second STA.
- the first BSSID is a BSSID corresponding to the BSS where the second STA is located;
- the sending unit 801 is further configured to send a fourth wireless frame, where the fourth wireless frame includes address information of the second STA, and the query frame is used to request a BSSID corresponding to the BSS where the second STA is located;
- the receiving unit 802 is further configured to receive a response frame of the fourth wireless frame, where the response frame of the fourth wireless frame includes the BSSID corresponding to the BSS where the second STA is located.
- the communication device 800 includes a sending unit 801 and a receiving unit 802 .
- the sending unit 801 and the receiving unit 802 are used to perform the following process.
- the receiving unit 802 is configured to receive a first wireless frame, where the first wireless frame includes address information of the initiator, address information of the responder, and a first BSSID; wherein, the first BSSID is the BSS where the first STA is located The BSSID in the multi-BSSID set to which the BSSID belongs;
- the sending unit 801 is configured to send a second wireless frame, where the second wireless frame is a response frame of the first wireless frame.
- the first wireless frame received by the receiving unit 802 includes the address information of the initiator, the address information of the responder and the first BSSID.
- the first STA may be a TDLS initiator (TDLS initiator)
- the second STA may be a TDLS responder (TDLS responder)
- the first BSSID is the BSSID in the multi-BSSID set to which the BSSID of the BSS where the first STA is located belongs.
- the sending unit sends the first wireless frame based on the first wireless frame.
- the response frame is the second radio frame. Therefore, when the BSSs of different STAs belong to the same multi-BSSID set, different STAs implement TDLS transmission by carrying the BSSIDs in the multi-BSSID set in the wireless frame, so that the BSSIDs associated in the same multi-BSSID set Different STAs communicate based on TDLS to realize point-to-point communication, increase transmission rate, and reduce delay.
- the initiator is the first STA, and the responder is the second STA; or, the initiator is the first multi-link device MLD where the first STA is located, and the responder is the The second STA; or, the initiator is the first STA, and the responder is the second MLD where the second STA is located; or, the initiator is the first MLD where the first STA is located, and the responder is the The second MLD where the second STA is located.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the BSSID of the BSS where the first STA is located is the same as the BSSID of the BSS where the second STA is located.
- the first BSSID is the Transmitted BSSID in the multi-BSSID set; or,
- the first BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the first BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the first BSSID is any BSSID in the multi-BSSID set.
- the second radio frame includes address information of the initiator, address information of the responder, and a second BSSID; wherein, the multi-BSSID set includes the second BSSID.
- the second BSSID is the Transmitted BSSID of the transmitted basic service set identifier in the multi-BSSID set; or,
- the second BSSID is the BSSID corresponding to the BSS where the first STA is located; or,
- the second BSSID is a BSSID corresponding to the BSS where the second STA is located.
- the second BSSID is any BSSID in the multi-BSSID set.
- the first BSSID is the same as the second BSSID.
- the first BSSID is different from the second BSSID.
- the BSSID of the BSS where the first STA is located is different from the BSSID of the BSS where the second STA is located.
- the first radio frame is a TDLS discovery request frame and the second radio frame is a TDLS discovery response frame; or,
- the first radio frame is a TDLS setup request frame and the second radio frame is a TDLS setup response frame; or,
- the first radio frame is a TDLS setup acknowledgment frame and the second radio frame is a first acknowledgment frame; or,
- the first wireless frame is a TDLS data frame and the second wireless frame is a second confirmation frame.
- the first acknowledgment frame may be an acknowledgment (acknowledge, ACK) frame
- the second acknowledgment frame may be a block acknowledgment (block acknowledgment, Block ACK, BA for short) frame or ACK frame.
- the first wireless frame includes a link identifier information (Link Identifier element, LIE) element, and the link identifier information element includes the address information of the initiator, the address information of the responder, and the The first BSSID, wherein the address information of the initiator is the MAC address information of the first STA.
- LIE Link Identifier element
- the first STA is a single-link device.
- the first radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the address information of the initiator, the address information of the responder, and the first BSSID, wherein, the address information of the initiator is the MAC address information of the first MLD where the first STA is located;
- the multi-link element includes the MAC address information of the first STA.
- the first STA is an STA in the multi-link device.
- the multi-link element includes a public information field, and the MAC address information of the first STA is located in the public information field.
- the first radio frame includes a multi-link element, and the multi-link element includes a first field, where the first field is used to indicate whether the multi-link element includes the MAC address of the first STA. Address information.
- the first field is used to indicate that the multi-link element in the first radio frame includes the MAC address information of the first STA.
- the first field is used to indicate that the multi-link element in the first radio frame does not include the MAC address information of the first STA.
- the first value is different from the second value.
- the first field is located in an appearance bitmap field in the multilink element.
- the second radio frame includes a link identification information element, where the link identification information element includes address information of the initiator, address information of the responder, and the second BSSID.
- the address information of the responder is MAC address information of the MAC of the second STA.
- the second STA is a single-link device.
- the second radio frame includes a link identification information element and a multi-link element;
- the link identification information element includes the address information of the initiator, the address information of the responder, and the second BSSID, the address information of the responder is the MAC address information of the second MLD where the second STA is located;
- the multi-link element includes the MAC address information of the second STA.
- the second STA is an STA in the multi-link device.
- the multi-link element includes a common information field, and the MAC address information of the second STA is located in the common information field.
- the second radio frame includes a multi-link element, and the multi-link element includes a second field, where the second field is used to indicate whether the multi-link element includes the MAC address of the second STA. Address information.
- the first field is used to indicate that the multi-link element in the second radio frame includes the MAC address information of the second STA.
- the first field is used to indicate that the multi-link element in the second radio frame does not include the MAC address information of the second STA.
- the first value is different from the second value.
- the second field is located in the presence bitmap field in the multilink element.
- the second wireless frame is a TDLS establishment response frame;
- the receiving unit 802 receiving the second wireless frame includes: the receiving unit 802 receiving the second wireless frame from the first AP associated with the first STA Two wireless frames, wherein the second wireless frame includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the first STA, and the value of the A2 field is the address information of the first AP Address information, the value of the A3 field is the address information of the responder.
- the first wireless frame is a TDLS data frame;
- the receiving unit 802 receiving the first wireless frame includes: the receiving unit 802 receiving the first wireless frame from the first STA, the first A wireless frame also includes an A1 field, an A2 field, and an A3 field; wherein, the value of the A1 field is the address information of the second STA, the value of the A2 field is the address information of the initiator, and the value of the A3 field is MAC address information of BSSID or AP MLD.
- the second radio frame includes a TDLS discovery response frame, a TDLS setup confirmation frame response frame, or a TDLS data frame response frame;
- the sending unit 801 sending the second radio frame includes: the sending unit 801 Send the second wireless frame to the first STA, where the second wireless frame includes an A1 field, an A2 field, and an A3 field; where the value of the A1 field is the address information of the originator, and the value of the A2 field is The value is the address information of the second STA, and the value of the A3 field is the MAC address information of BSSID or AP MLD.
- the first wireless frame further includes a TPK Handshake Message, where the TPK Handshake Message is used to carry parameters required for generating the TPK, where the parameters include the first BSSID.
- the first STA and the second STA belong to different multi-link devices MLD respectively.
- the communication device 800 includes a sending unit 801 and a receiving unit 802 .
- the sending unit 801 and the receiving unit 802 are used to perform the following process.
- the receiving unit 802 is configured to receive a third wireless frame from the first STA, where the third wireless frame includes the IP address information of the responder, and the query frame is used to request the MAC address information of the responder; wherein, the first The BSS where the STA is located is different from the BSS where the responder is located;
- the sending unit 801 is configured to send a response frame of the third wireless frame, where the response frame of the fourth wireless frame includes the MAC address information of the responder.
- the third wireless frame carrying the responder's IP address received by the receiving unit 802 is used to request the responder's MAC address, so that the sending unit 801 sends a response frame of the third wireless frame based on the third wireless frame, So that the first STA determines the MAC address of the responder through the response frame of the third radio frame. Thereafter, the first STA can implement TDLS transmission with the responder through the first wireless frame carrying the MAC address of the responder, and the BSS where the first STA is located and the BSS where the responder is located belong to the same multi-BSSID set and the first The BSS where the STA resides is different from the BSS where the responder resides.
- STAs in different BSSs realize TDLS transmission by carrying the MAC address indicated by the AP in the wireless frame, so that different STAs associated in the same multi-BSSID set can communicate based on TDLS to realize point-to-point communication and improve transmission speed and reduce latency.
- the responder is the second STA or the second MLD where the second STA is located.
- the first STA is located on the same local area network as the responder; or,
- the first STA is located on the same subnet as the responder; or,
- mapping relationship between the responder's identification information and the responder's address information is pre-configured on the AP.
- the receiving unit 802 is also used for a fourth wireless frame from the first STA, where the fourth wireless frame includes address information of the responder, and the query frame is used to request the BSSID corresponding to the BSS where the responder is located;
- the sending unit 801 is further configured to send a response frame of the fourth wireless frame, where the response frame of the fourth wireless frame includes the BSSID corresponding to the BSS where the responder is located.
- the communication device 800 may also be used to execute other aforementioned embodiments and achieve corresponding beneficial effects.
- the communication device 800 may also be used to execute other aforementioned embodiments and achieve corresponding beneficial effects.
- FIG. 9 is a schematic structural diagram of a communication device 900 provided in an embodiment of the present application.
- the communication device 900 may be an AP (such as the AP in the foregoing method embodiments) or a STA (such as the TDLS initiator or TDLS responder in the foregoing method embodiments), or a chip therein.
- FIG. 9 only shows the main components of a communication device 900 which includes at least a transceiver 902 .
- the transceiver 902 may also be called an input and output port, a communication port, or a communication interface.
- the communication device 900 further includes a processor 901 ; in addition, the communication device 900 may further include a memory 903 .
- the apparatus 900 may further add a bus 904, which is used to establish a connection between the transceiver 902 and/or the memory 903 and the processor 901.
- the processor 901 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process data of the software programs.
- the memory 903 is mainly used to store software programs and data.
- the transceiver 902 may include a control circuit and an antenna, and the control circuit is mainly used for converting a baseband signal to a radio frequency signal and processing the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
- the transceiver 902 may be a touch screen, a display screen, a keyboard, etc., and is mainly used to receive data input by a user and output data to the user.
- the processor 901 can read the software program in the memory 903, interpret and execute the instructions of the software program, and process the data of the software program.
- the processor 901 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
- the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 901, and the processor 901 converts the baseband signal into data and processes the data deal with.
- the memory 903 may be located in the processor 901 .
- the processor 901 may include a communication interface for implementing receiving and sending functions.
- the communication interface may be a transceiver circuit, or an interface, or an interface circuit.
- the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
- the above-mentioned transceiver circuit, interface or interface circuit can be used for code/data reading and writing, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.
- the processor 901 may store instructions, the instructions may be computer programs, and the computer programs run on the processor 901 to enable the communication device 900 to execute the method described in any of the above-mentioned embodiments.
- the computer program may be fixed in the processor 901, and in this case, the processor 901 may be implemented by hardware.
- the communication device 900 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in any of the foregoing embodiments.
- the processor and communication interface described in this application can be implemented in integrated circuit (integrated circuit, IC), analog IC, radio frequency integrated circuit (radio frequency integrated circuit, RFIC), mixed signal IC, application specific integrated circuit (application specific integrated circuit) , ASIC), printed circuit board (printed circuit board, PCB), electronic equipment, etc.
- the processor and communication interface can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
- CMOS complementary metal oxide semiconductor
- NMOS nMetal-oxide-semiconductor
- PMOS P-type Metal oxide semiconductor
- BJT bipolar junction transistor
- BiCMOS bipolar CMOS
- SiGe silicon germanium
- GaAs gallium arsenide
- a communication device may be a stand-alone device or may be part of a larger device.
- the communication device may be:
- a set of one or more ICs may also include storage components for storing data and computer programs;
- ASIC such as modem (Modem);
- the AP and STA described in the embodiments of this application may be implemented by a general-purpose processor.
- the embodiment of the present application also provides a computer-readable storage medium, where computer program code is stored, and when the above-mentioned processor executes the computer program code, the electronic device executes the method in any one of the above-mentioned embodiments.
- An embodiment of the present application further provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any one of the preceding embodiments.
- the embodiment of the present application also provides a communication device, which can exist in the product form of a chip.
- the structure of the device includes a processor and an interface circuit.
- the processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method in any of the examples.
- the embodiment of the present application also provides a wireless communication system, including at least two STAs (and possibly existing APs), and the at least two STAs (and possibly existing APs) can execute the method in any of the preceding embodiments.
- the steps of the methods or algorithms described in connection with the disclosure of this application can be implemented in the form of hardware, or can be implemented in the form of a processor executing software instructions.
- Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), electrically erasable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art.
- An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
- the storage medium may also be a component of the processor.
- the processor and storage medium can be located in the ASIC.
- Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
- a storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
Abstract
Description
元素ID | 长度 | 最大BSSID指示 | 可选的子元素 | |
字节 | 1 | 1 | 1 | 可变 |
子元素ID | 名字 | 拓展 |
0 | NontransmittedBSSIDprofile | 不可拓展 |
1-220 | 保留 | |
221 | 厂商专有 | 厂商定义 |
222-255 | 保留 |
Claims (28)
- 一种应用于通道直接链路建立TDLS的传输方法,其特征在于,包括:发送第一无线帧,所述第一无线帧包括发起者的地址信息、响应者的地址信息和第一基本服务集标识BSSID;其中,所述第一BSSID为第一站点STA所在的基本服务集BSS的BSSID所属的多BSSID集合中的BSSID;接收第二无线帧,所述第二无线帧为所述第一无线帧的响应帧。
- 一种应用于通道直接链路建立TDLS的传输方法,其特征在于,包括:接收第一无线帧,所述第一无线帧包括发起者的地址信息、响应者的地址信息和第一基本服务集标识BSSID;其中,所述第一BSSID为第二站点STA所在的基本服务集BSS的BSSID所属的多BSSID集合中的BSSID;发送第二无线帧,所述第二无线帧为所述第一无线帧的响应帧。
- 根据要求1或2所述的方法,其特征在于,所述发起者为第一STA,所述响应者为第二STA;或,所述发起者为所述第一STA所在的第一多链路设备MLD,所述响应者为所述第二STA;或,所述发起者为所述第一STA,所述响应者为所述第二STA所在的第二MLD;或,所述发起者为所述第一STA所在的第一MLD,所述响应者为所述第二STA所在的第二MLD。
- 根据权利要求3所述的方法,其特征在于,所述第一STA所在的BSS的BSSID不同于所述第二STA所在的BSS的BSSID。
- 根据权利要求3或4所述的方法,其特征在于,所述第一BSSID为所述多BSSID集合中的Transmitted BSSID;或,所述第一BSSID为第一STA所在的BSS对应的BSSID;或,所述第一BSSID为第二STA所在的BSS对应的BSSID。
- 根据权利要求3至5任一项所述的方法,其特征在于,所述第二无线帧包括所述发起者的地址信息、所述响应者的地址信息和第二BSSID;其中,所述多BSSID集合包括所述第二BSSID。
- 根据权利要求6所述的方法,其特征在于,所述第二BSSID为所述多BSSID集合中的传输的基本服务集标识Transmitted BSSID;或,所述第二BSSID为第一STA所在的BSS对应的BSSID;或,所述第二BSSID为第二STA所在的BSS对应的BSSID。
- 根据权利要求6或7所述的方法,其特征在于,所述第一BSSID与所述第二BSSID相同。
- 根据权利要求1至8任一项所述的方法,其特征在于,所述第一无线帧为TDLS发现请求帧且所述第二无线帧为TDLS发现响应帧;或,所述第一无线帧为TDLS建立请求帧且所述第二无线帧为TDLS建立响应帧;或,所述第一无线帧为TDLS建立确认帧且所述第二无线帧为第一确认帧;或,所述第一无线帧为TDLS数据帧且所述第二无线帧为第二确认帧。
- 根据权利要求3至9任一项所述的方法,其特征在于,所述第一无线帧包括链路标识信息元素,所述链路标识信息元素包括所述发起者的地址信息、所述响应者的地址信息和所述第一BSSID;其中,所述发起者的地址信息为所述第一STA的MAC地址信息。
- 根据权利要求3至9任一项所述的方法,其特征在于,所述第一无线帧包括链路标识信息元素和多链路元素;所述链路标识信息元素包括所述发起者的地址信息、所述响应者的地址信息和所述第一BSSID,其中,所述发起者的地址信息为所述第一STA所在的第一MLD的MAC地址信息;所述多链路元素包括所述第一STA的MAC地址信息。
- 根据权利要求11所述的方法,其特征在于,所述多链路元素包括公共信息字段,所述第一STA的MAC地址信息位于所述公共信息字段中。
- 根据权利要求3至12任一项所述的方法,其特征在于,所述第一无线帧包括多链路元素,所述多链路元素包括第一字段,所述第一字段用于指示所述多链路元素是否包括所述第一STA的MAC地址信息。
- 根据权利要求13所述的方法,其特征在于,所述第一字段位于所述多链路元素中的出现位图字段中。
- 根据权利要求6至14任一项所述的方法,其特征在于,所述第二无线帧包括链路标识信息元素,所述链路标识信息元素包括所述发起者的地址信息、所述响应者的地址信息和所述第二BSSID;其中,所述响应者的地址信息为所述第二STA的MAC地址信息。
- 根据权利要求6至14任一项所述的方法,其特征在于,所述第二无线帧包括链路标识信息元素和多链路元素;所述链路标识信息元素包括所述发起者的地址信息、所述响应者的地址信息和所述第二BSSID,所述响应者的地址信息为所述第二STA所在的第二MLD的MAC地址信息;所述多链路元素包括所述第二STA的MAC地址信息。
- 根据权利要求16所述的方法,其特征在于,所述多链路元素包括公共信息字段,所述第二STA的MAC地址信息位于所述公共信息字段中。
- 根据权利要求3至17任一项所述的方法,其特征在于,所述第二无线帧包括多链路元素,所述多链路元素包括第二字段,所述第二字段用于指示所述多链路元素是否包括所述第二STA的MAC地址信息。
- 根据权利要求18所述的方法,其特征在于,所述第二字段位于所述多链路元素中的出现位图字段中。
- 根据权利要求1至19任一项所述的方法,其特征在于,所述第一无线帧还包括通道直接链路建立对等秘钥握手消息TPK Handshake Message,所述TPK Handshake Message用于携带生成通道直接链路建立对等秘钥TPK所需的参数,所述参数包括所述第一BSSID。
- 根据权利要求3至20任一项所述的方法,其特征在于,在所述发送第一无线帧之前,所述方法还包括:发送第三无线帧,所述第三无线帧包括所述响应者的互联网协议IP地址信息,其中,所述询问帧用于请求所述响应者的MAC地址信息;接收所述第三无线帧的响应帧,所述第三无线帧的响应帧包括所述响应者的MAC地址信息。
- 根据权利要求3至21任一项所述的方法,其特征在于,所述第一BSSID为所述第二STA所在的BSS对应的BSSID,在所述发送第一无线帧之前,所述方法还包括:发送第四无线帧,所述第四无线帧包括所述响应者的地址信息,其中,所述询问帧用于请求所述响应者所在的BSS对应的BSSID;接收所述第四无线帧的响应帧,所述第四无线帧的响应帧包括所述响应者所在的BSS对应的BSSID。
- 一种应用于通道直接链路建立TDLS的传输装置,其特征在于,所述装置包括接收单元和发送单元,其中,所述装置用于执行权利要求1、3至22任一项所述的方法。
- 一种应用于通道直接链路建立TDLS的传输装置,其特征在于,所述装置包括接收单元和发送单元,其中,所述装置用于执行权利要求2至22任一项所述的方法。
- 一种通信装置,其特征在于,包括至少一个处理器,与存储器耦合;所述存储器用于存储程序或指令;所述至少一个处理器用于执行所述程序或指令,以使所述装置实现如权利要求1、3至22任一项所述的方法。
- 一种通信装置,其特征在于,包括至少一个处理器,与存储器耦合;所述存储器用于存储程序或指令;所述至少一个处理器用于执行所述程序或指令,以使所述装置实现如权利要求2至22任一项所述的方法。
- 一种包含程序指令的计算机程序产品,其特征在于,当所述程序指令在计算机上运行时,使得所述计算机执行权利要求1至22任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储程序指令,当所述程序指令运行时,使得权利要求1至22任一项所述的方法被执行。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111044588.7A CN115776735A (zh) | 2021-09-07 | 2021-09-07 | 一种应用于通道直接链路建立的传输方法及装置 |
CN202111044588.7 | 2021-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023035845A1 true WO2023035845A1 (zh) | 2023-03-16 |
Family
ID=85387641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2022/111737 WO2023035845A1 (zh) | 2021-09-07 | 2022-08-11 | 一种应用于通道直接链路建立的传输方法及装置 |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN115776735A (zh) |
TW (1) | TWI820874B (zh) |
WO (1) | WO2023035845A1 (zh) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080075038A1 (en) * | 2006-09-26 | 2008-03-27 | Samsung Electronics Co., Ltd. | Communication method using direct link in wireless network and apparatus therefor |
CN101572935A (zh) * | 2008-04-28 | 2009-11-04 | 索尼株式会社 | 无线通信系统、无线通信装置、无线通信方法及程序 |
US20100014458A1 (en) * | 2008-07-17 | 2010-01-21 | Samsung Electronics Co., Ltd. | System and method for establishing a direct link on the high throughput channel of a multi-rate channel wireless communications network |
CN101803294A (zh) * | 2007-09-18 | 2010-08-11 | Lg电子株式会社 | 隧道直接链路建立无线网络中的直接链路建立过程和支持该过程的站点 |
CN102595396A (zh) * | 2012-01-21 | 2012-07-18 | 重庆邮电大学 | 一种基于wapi的tdls安全保护方法 |
CN104053213A (zh) * | 2013-03-11 | 2014-09-17 | 中兴通讯股份有限公司 | 无线通信网络中的集成中继 |
CN112839332A (zh) * | 2019-11-22 | 2021-05-25 | 华为技术有限公司 | 多频段通信、接口参数更新方法、ap设备和ml设备 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009134066A1 (en) * | 2008-05-01 | 2009-11-05 | Lg Electronics Inc. | Direct link setup method in tunneled direct link setup wireless network and station supporting the method |
JP6042981B2 (ja) * | 2012-07-03 | 2016-12-14 | インターデイジタル パテント ホールディングス インコーポレイテッド | 高速初期リンク設定探索フレーム |
US11445431B2 (en) * | 2019-07-12 | 2022-09-13 | Qualcomm Incorporated | Multi-link communication |
-
2021
- 2021-09-07 CN CN202111044588.7A patent/CN115776735A/zh active Pending
-
2022
- 2022-08-11 WO PCT/CN2022/111737 patent/WO2023035845A1/zh unknown
- 2022-08-22 TW TW111131571A patent/TWI820874B/zh active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080075038A1 (en) * | 2006-09-26 | 2008-03-27 | Samsung Electronics Co., Ltd. | Communication method using direct link in wireless network and apparatus therefor |
CN101803294A (zh) * | 2007-09-18 | 2010-08-11 | Lg电子株式会社 | 隧道直接链路建立无线网络中的直接链路建立过程和支持该过程的站点 |
CN101572935A (zh) * | 2008-04-28 | 2009-11-04 | 索尼株式会社 | 无线通信系统、无线通信装置、无线通信方法及程序 |
US20100014458A1 (en) * | 2008-07-17 | 2010-01-21 | Samsung Electronics Co., Ltd. | System and method for establishing a direct link on the high throughput channel of a multi-rate channel wireless communications network |
CN102595396A (zh) * | 2012-01-21 | 2012-07-18 | 重庆邮电大学 | 一种基于wapi的tdls安全保护方法 |
CN104053213A (zh) * | 2013-03-11 | 2014-09-17 | 中兴通讯股份有限公司 | 无线通信网络中的集成中继 |
CN112839332A (zh) * | 2019-11-22 | 2021-05-25 | 华为技术有限公司 | 多频段通信、接口参数更新方法、ap设备和ml设备 |
Also Published As
Publication number | Publication date |
---|---|
TWI820874B (zh) | 2023-11-01 |
TW202312774A (zh) | 2023-03-16 |
CN115776735A (zh) | 2023-03-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20240040639A1 (en) | Communication apparatus and communication method for multi-link peer to peer communication | |
US9554404B2 (en) | Method and apparatus for transmitting frame in wireless local area network (WLAN) system | |
US11012923B2 (en) | Discovery and security in LWA communication | |
US20190045476A1 (en) | User device and message forwarding method | |
JP5680657B2 (ja) | ピア・ツー・ピア通信のスケジュールされたアクセス・ポイント | |
AU2021243081B2 (en) | Communication method applied to multi-link device in wireless local area network, and device | |
US20240015640A1 (en) | Access point (ap) multi-link device discovery method and related apparatus | |
WO2021238882A1 (zh) | 一种实现业务连续性的方法及装置 | |
WO2020238957A1 (zh) | 验证方法及装置 | |
WO2023036081A1 (zh) | 一种通信方法及通信装置 | |
CA3188573A1 (en) | Request and response method for probing mld, station, and access point | |
EP4380111A1 (en) | Radio-frame sending method and apparatus, and radio-frame receiving method and apparatus | |
WO2023045499A1 (zh) | 无线帧发送方法及装置、无线帧接收方法及装置 | |
WO2023035845A1 (zh) | 一种应用于通道直接链路建立的传输方法及装置 | |
CN116762466A (zh) | 用于多链路传输的设备和方法 | |
WO2024109035A1 (zh) | 多链路并发连接方法、装置及设备 | |
WO2022022639A1 (zh) | 一种通信方法及装置 | |
US12003399B2 (en) | Request and response method for probing MLD, station, and access point | |
US20240090056A1 (en) | Multi-Access Point Association | |
WO2024087627A1 (zh) | 一种协作传输方法及相关装置 | |
KR20240035718A (ko) | 다중 액세스 포인트 연관 | |
CN117692990A (zh) | 多接入点关联 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22866319 Country of ref document: EP Kind code of ref document: A1 |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112024004376 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 2022866319 Country of ref document: EP Effective date: 20240313 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |