CN101472299A - Method, system and device for dynamically determining Off-Channel - Google Patents
Method, system and device for dynamically determining Off-Channel Download PDFInfo
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- CN101472299A CN101472299A CNA2007103080239A CN200710308023A CN101472299A CN 101472299 A CN101472299 A CN 101472299A CN A2007103080239 A CNA2007103080239 A CN A2007103080239A CN 200710308023 A CN200710308023 A CN 200710308023A CN 101472299 A CN101472299 A CN 101472299A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
Abstract
The invention discloses a method for dynamically confirming Off-Channel, which comprises the following steps: wireless environment and channel parameters of a local terminal and a receiving terminal are obtained by a sending terminal; the sending terminal sends out a request message, so as to switch to the receiving terminal, and the request message for switching carries an information list of a switching channel; the sending terminal receives the switching response message returned by the receiving terminal, and the response message carries the switching channel information confirmed by the receiving terminal. The invention further discloses a system and equipment for dynamically confirming the Off-Channel. The invention ensures that the Off-Channel which is available through direct connection is confirmed on a dynamic and real-time basis, so that the availability of Off-Channel is ensured.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method, system and device of dynamically determining Off-Channel.
Background technology
In the prior art, be connected to same AP (Access Point, access point) two WIFI (Wireless Fidelity on, Wireless Fidelity) terminal room carries out interacting message by the data channel that AP provides, thereby set up direct channel, because the interactive messages in the process set up of two terminal room direct channels is to be encapsulated in the Frame of two terminals by the communication channel transmission of AP to transmit, so setting up process, such direct channel is called TDLS (Tunneled Direct Link Setup, the direct-connected pattern of setting up in tunnel) again.According to the TDLS mechanism that present this standard provides, the foundation of two WIFI terminal room direct channels must depend on AP, and requires to set up two direct-connected WIFI terminals and be connected in same AP, as shown in Figure 1.
The direct channel of setting up between two terminals can use two channel: Base-channel (primary channel) and Off-Channel (extended channel), Base-channel be use when direct-connected between the terminal with the AP identical channel of frequency of communicating by letter, Off-Channel leaves the frequency channel inequality of communicating by letter with AP that uses behind the Base-channel when direct-connected between the terminal.Under direct-connected state, terminal can be switched between Base-channel and Off-Channel by TDLS channel switch request TDLS_Channel_Switch_Request and TDLS channel handoff response TDLS_Channel_Switch_Response message.
Wherein, Off-Channel sets up the direct-connected request of request message TDLS_Setup.Request initiator by TDLS to determine before direct-connected foundation, by the direct-connected WIFI terminal of initiator before direct channel is set up by determining Off-Channel to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment and the channel parameter information of acquisition, and set up acknowledge message TDLS_Setup.confirm by TDLS and notify the other side with the Off-Channel that determines, use so that when direct-connected state, switch to Off-Channel by Base-channel.
In realizing process of the present invention, the inventor finds that there is following shortcoming in prior art:
The Off-Channel of prior art determined before two the direct-connected foundation of terminal, and in case determines then no longer change in the cycle that this direct channel exists.Because, after the direct channel of two WIFI terminals is set up, communication path might not switch to direct access path from the AP path at once, also not necessarily use Off-Channel (also may use Base-channel) even switch to direct access path, like this owing to the reason of time or wireless environment variation will cause pre-determined Off-Channel terminal need when Base-channel switches to Off-Channel, become unavailable (as during nearby occurred and Off-channel with interference source frequently).
Summary of the invention
The embodiment of the invention provides a kind of method, system and device of dynamically determining Off-Channel, determines the Off-Channel of direct-connected use is dynamically instant, has guaranteed the availability of Off-Channel.
The embodiment of the invention provides a kind of method of dynamically determining Off-Channel, may further comprise the steps:
Obtain the wireless environment and the channel parameter of local terminal and receiving terminal;
Send handoff request message to described receiving terminal, described handoff request message is carried the switching channels information list;
Receive the switching response message that described receiving terminal returns, carry the switching channels information that described receiving terminal is determined in the described response message.
The embodiment of the invention provides a kind of transmission terminal, comprising:
The channel quality acquiring unit is used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal;
The Off-Channel determining unit of tabulating is used for determining can be used as according to described channel quality the Off-Channel tabulation of switching target channel;
The request message transmitting element is used for the channel list that described needs switch is sent to described receiving terminal by request message;
Direct channel is set up the unit, is used at receiving terminal setting up direct channel according to described Off-Channel behind the Off-Channel that described tabulation is selected.
The embodiment of the invention provides a kind of receiving terminal, comprising:
The request message receiving element is used to receive the request message that sends the terminal transmission, obtains the Off-Channel tabulation;
Selected cell is used for the Off-Channel that adopts in described tabulation selection; Or according to the available switching target channel Off-Channel beyond residing wireless environment and the definite tabulation of channel conditions.
The response message transmitting element, the Off-Channel that is used for selecting returns to described transmission terminal by response message.
The embodiment of the invention provides a kind of system that dynamically determines Off-Channel, comprising:
Send terminal, be used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal, send handoff request message to described receiving terminal, described handoff request message is carried the switching channels tabulation; Behind the Off-Channel that receiving terminal is selected, set up direct channel according to described Off-Channel in described tabulation;
Receiving terminal, be used to receive from sending the switching channels tabulation that terminal sends, from described tabulation, select Off-Channel, or determine available switching target channel Off-Channel beyond the tabulation, and return to described transmission terminal by switching response message according to residing wireless environment and channel conditions.
In the embodiments of the invention, making can be to the Off-Channel dynamic negotiation between two direct-connected STA.By the WIFI terminal (STA) of sending TDLS_Channel_Switch_Request before sending channel switch request by determining Off-Channel to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment and the channel parameter information that obtain, and the up-to-date definite Off-Channel of a side that will initiate to switch by the Off-Channel parameter that increases newly in TDLS_Channel_Switch_Request message notifies the other side, make two direct-connected STA use the Off-Channel of current optimum, guarantee the availability of selected Off-Channel.
Description of drawings
Fig. 1 sets up two direct-connected WIFI terminals to be connected in same AP structure chart in the prior art;
Fig. 2 is a method flow diagram of dynamically determining Off-Channel in the embodiment of the invention one;
Fig. 3 is a method flow diagram of dynamically determining Off-Channel in the embodiment of the invention two;
Fig. 4 is a method flow diagram of dynamically determining Off-Channel in the embodiment of the invention three;
Fig. 5 is a method flow diagram of dynamically determining Off-Channel in the embodiment of the invention four.
Embodiment
The embodiment of the invention one provides a kind of method of dynamically determining Off-Channel, as shown in Figure 2, may further comprise the steps:
Step s201, two terminals setting up direct access path are when carrying out switching to direct access path by the AP path, use the Base-channel of direct access path, before sending channel switch request by the WIFI terminal equipment (STA) that sends TDLS_Channel_Switch_Request message under the direct-connected state, carry out in advance determining one or more Off-Channel to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment of living in and the channel parameter information that obtain.For example, obtain parameters such as channel loss, the error rate, signal to noise ratio.
Step s202 carries definite pairing administrative class of one or more switching target channels (RegulatoryClasses) and channel number by the parameter objectives channel list after improving in the TDLS_Channel_Switch_Request message and notifies the other side.Wherein, TDLS channel switch request frame format, as shown in table 1, comprise the destination channel indication, be set to 0 indication Base-channel; Be set to 1 indication Off-Channel; The indication of Off-Channel number.TDLS channel switch request frame transmits on direct access path.Off-Channellist is N*2-octet, is used to indicate the tabulation of initiating the selected one or more destination channel of STA.
Table 1:
| Order | Information | Note |
| 1 | The destination channel indication | 1-octet is set to 0 indication Base-channel; Be set to 1 indication Off-Channel |
| 2 | Off-Channel?list | N*2-octet is used to indicate the tabulation of initiating the selected one or more destination channel of STA |
Step s203, if the other side accepts some destination channel of carrying in request that channel switches and the handoff request, then in the TDLS_Channel_Switch_Response response message, Result Code parameter is changed to 0, and the selected Off-Channel information of parameter TargetChannel feedback by increasing newly among the TDLS_Channel_Switch_Response, then two WIFI terminals (STA) use this destination channel to carry out the switching of direct-connected channel.If the other side does not accept the switching target channel that carries in request that channel switches or the handoff request, then not carrying out direct-connected channel switches, and in TDLS_Channel_Switch_Response message, Result Code parameter is changed to 1, then feed back to the terminal of the request of sending by the parameter Target Channel that increases newly if any the Off-channel of suggestion in addition.Also can determine tabulation available switching target channel Off-Channel in addition, and return to the transmission terminal by described response message according to residing wireless environment and channel conditions.TDLS channel handoff response frame format such as table 2, TDLS channel handoff response frame transmits on direct access path.
Table 2:
| Order | Information | Note |
| 1 | Object code | 1-octet is set to 1 indication handoff request and is accepted; Being set to 0 indication handoff request is rejected. |
| 2 | Off-channel | 2-octet is used to the channel of indicating Peer STA to determine. |
The embodiment of the invention two provides a kind of method of dynamically determining Off-Channel, as shown in Figure 3, may further comprise the steps:
Step s301, two terminals setting up direct access path are when carrying out switching to direct access path by the AP path, use the Base-channel of direct access path, before sending channel switch request by the WIFI terminal equipment (STA) that sends TDLS_Channel_Switch_Request message under the direct-connected state, carry out in advance determining Off-Channel to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment of living in and the channel parameter information that obtain.For example, obtain parameters such as channel loss, the error rate, signal to noise ratio.
Step s302, when indicating the channel of current switching to be Off-Channel, indicate pairing administrative class of selected Off-Channel (Regulatory Classes) and channel number to the other side by in TDLS_Channel_Switch_Request message, increasing the Off-Channel parameter by Target Channel parameter in the TDLS_Channel_Switch_Request message.Wherein, TDLS channel switch request frame format, as shown in table 3, comprise the destination channel indication, be set to 0 indication Base-channel; Be set to 1 indication Off-Channel; The indication of Off-Channel number.TDLS channel switch request frame transmits on direct access path.
Table 3:
| Order | Information | Note |
| 1 | Destination channel | 1-octet is set to 0 indication Base-channel; Be set to 1 indication Off-Channel |
| 2 | Off-Channel | 1-octet, indication Off-Channel number.(be used to indicate Off-Channel under administrative class and channel number) |
Step s303, if the other side accepts the Off-Channel that carries in the handoff request of channel and the handoff request, then two WIFI terminals (STA) use this Off-Channel as direct-connected channel, and in the TDLS_Channel_Switch_Response response message Result Code parameter are changed to 0.If the other side does not accept the Off-Channel that carries in request that channel switches or the handoff request, then can in TDLS_Channel_Switch_Response message, Result Code parameter be changed to 1.Wherein, TDLS channel handoff response frame format such as table 4 comprise object code, are set to 1 indication handoff request and are accepted; Being set to 0 indication handoff request is rejected.TDLS channel handoff response frame transmits on direct access path.
Table 4:
| Order | Information | Note |
| 1 | Object code | 1-octet is set to 1 indication handoff request and is accepted; Being set to 0 indication handoff request is rejected. |
The embodiment of the invention three provides a kind of method of dynamically determining Off-Channel, as shown in Figure 4, may further comprise the steps:
Step s401, two terminals setting up direct access path are when carrying out switching to direct access path by the AP path, use the Base-channel of direct access path, prior by determining the switching target channel before sending channel switch request under this direct-connected state to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment of living in and the channel parameter information that obtain by the WIFI terminal equipment (STA) that sends the TDLS_Channel_Switch_Request channel switch request.
Step s402 directly carries definite pairing administrative class of switching target channel (RegulatoryClasses) and channel number by the parameter Target Channel after improving in the TDLS_Channel_Switch_Request message and notifies the other side.Wherein, TDLS channel switch request frame format such as table 5, TDLS channel switch request frame transmits on direct access path, and switching meeting Base-channel will always be accepted.
Table 5:
| Order | Information | Notes |
| 1 | Destination channel | 2-octet, the destination channel of indicating direct-connected channel to switch |
Step s503, if the other side accepts the destination channel of carrying in request that channel switches and the handoff request, then in the TDLS_Channel_Switch_Response response message Result Code parameter is changed to 0, then two WIFI terminals (STA) use this destination channel to carry out the switching of direct-connected channel.If the other side does not accept the switching target channel that carries in request that channel switches and the handoff request, then do not carry out direct-connected channel and switch, and in TDLS_Channel_Switch_Response message, Result Code parameter is changed to 1.TDLS channel handoff response frame format such as table 6, TDLS channel handoff response frame transmits on direct access path.
Table 6:
| Order | Information | Note |
| 1 | Object code | 1-octet is set to 1 indication handoff request and is accepted; Being set to 0 indication handoff request is rejected |
The embodiment of the invention four provides a kind of method of dynamically determining Off-Channel, as shown in Figure 5, may further comprise the steps:
Step s501, two terminals setting up direct access path are when carrying out switching to direct access path by the AP path, use the Base-channel of direct access path, before sending channel switch request by the WIFI terminal equipment (STA) that sends the TDLS_Channel_Switch_Request channel switch request under the direct-connected state in advance by determining one or more switching target channels to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment of living in and the channel parameter information that obtain.
Step s502 carries definite pairing administrative class of one or more switching target channels (RegulatoryClasses) and channel number by the parameter objectives channel list after improving in the TDLS_Channel_Switch_Request message and notifies the other side.TDLS channel switch request frame format such as table 7, TDLS channel switch request frame transmits on direct access path, and switching meeting Base-channel will always be accepted.
Table 7:
| Order | Information | Notes |
| 1 | The destination channel tabulation | N*2-octet, the tabulation that comprises one or more destination channel of indicating direct-connected channel to switch |
Step s503, if the other side accepts some destination channel of carrying in request that channel switches and the handoff request, then in the TDLS_Channel_Switch_Response response message, Result Code parameter is changed to 0, and the selected Off-Channel information of parameter TargetChannel feedback by increasing newly among the TDLS_Channel_Switch_Response, then two WIFI terminals (STA) use this destination channel to carry out the switching of direct-connected channel.If the other side does not accept the switching target channel that carries in request that channel switches or the handoff request, then not carrying out direct-connected channel switches, and in TDLS_Channel_Switch_Response message, Result Code parameter is changed to 1, then feed back to the terminal of the request of sending by the parameter Target Channel that increases newly if any the Off-channel of suggestion in addition.TDLS channel handoff response frame format such as table 8, TDLS channel handoff response frame transmits on direct access path.
Table 8:
| Order | Information | Note |
| 1 | Object code | 1-octet is set to 1 indication handoff request and is accepted; Being set to 0 indication handoff request is rejected |
| 2 | Destination channel | 2-octet indicates direct-connected channel to switch the destination channel of decision or suggestion |
The embodiment of the invention also provides a kind of system that dynamically determines Off-Channel, comprise: send terminal, be used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal, send handoff request message to described receiving terminal, described handoff request message is carried switching channels information; Receiving terminal, be used for determining whether to set up direct channel according to the switching channels information that described transmission terminal sends, or according to the available switching target channel Off-Channel beyond residing wireless environment and the definite tabulation of channel conditions, and return switching response message to described transmission terminal, carry described receiving terminal in the described response message and whether use described switching channels to set up the information of direct channel.
Described transmission terminal specifically comprises: the channel quality acquiring unit is used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal; The Off-Channel determining unit is used for determining that according to described channel quality the Off-Channel that can be used as the switching target channel tabulates; The request message transmitting element is used for the channel that described needs switch is sent to described receiving terminal by request message.
Described receiving terminal specifically comprises: the request message receiving element, be used to receive the request message that sends the terminal transmission, and obtain Off-Channel; Judging unit is used to judge whether to adopt described Off-Channel to set up direct channel; Direct channel is set up the unit, when being used for setting up, sets up direct channel; The response message transmitting element, the reason that is used to set up direct channel or refuse foundation is notified described transmission terminal.
The embodiment of the invention also provides a kind of system that dynamically determines Off-Channel, comprise: send terminal, be used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal, send handoff request message to described receiving terminal, described handoff request message is carried the switching channels tabulation; Behind the Off-Channel that receiving terminal is selected, set up direct channel according to described Off-Channel in described tabulation; Receiving terminal is used to receive from sending the switching channels tabulation that terminal sends, and selects Off-Channel from described tabulation, and returns to described transmission terminal by switching response message.
Described transmission terminal specifically comprises: the channel quality acquiring unit is used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal; The Off-Channel determining unit of tabulating is used for determining the Off-Channel tabulation that needs switch according to described channel quality; The request message transmitting element is used for the channel list that described needs switch is sent to described receiving terminal by request message; Direct channel is set up the unit, is used at receiving terminal setting up direct channel according to described Off-Channel behind the Off-Channel that described tabulation is selected.
Described receiving terminal specifically comprises: the request message receiving element, be used to receive the request message that sends the terminal transmission, and obtain the Off-Channel tabulation; Selected cell is used for the Off-Channel in described tabulation selection employing, or determines tabulation available switching target channel Off-Channel in addition according to residing wireless environment and channel conditions; The response message transmitting element, the Off-Channel that is used for selecting is not (if tabulation has suitable channel, can advise other channel) return to described transmission terminal by response message, described response message transmitting element is used for that also (refusal) set up the reason of failing and notifies described transmission terminal.
In the embodiments of the invention, making can be to the Off-Channel dynamic negotiation between two direct-connected STA.By the WIFI terminal (STA) of sending TDLS_Channel_Switch_Request before sending channel switch request by determining Off-Channel to the measurement of wireless environment and channel parameter and according to the distant terminal wireless environment and the channel parameter information that obtain, and the up-to-date definite Off-Channel of a side that will initiate to switch by the Off-Channel parameter that increases newly in TDLS_Channel_Switch_Request message notifies the other side, make two direct-connected STA use the Off-Channel of current optimum, guarantee the availability of selected Off-Channel.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (11)
1, a kind of method of dynamically determining extended channel Off-Channel is characterized in that, may further comprise the steps:
Obtain the wireless environment and the channel parameter of local terminal and receiving terminal;
Send handoff request message to described receiving terminal, described handoff request message is carried the switching channels information list;
Receive the switching response message that described receiving terminal returns, carry the switching channels information that described receiving terminal is determined in the described response message.
2, dynamically determine the method for Off-Channel according to claim 1, it is characterized in that wireless environment and channel parameter that described transmission terminal is obtained local terminal and receiving terminal specifically comprise:
Obtain the channel quality of local terminal and receiving terminal, comprising: channel strength, channel disturbance and the error rate;
Channel quality according to described local terminal and receiving terminal is determined corresponding Off-Channel.
3, dynamically determine the method for Off-Channel according to claim 1, it is characterized in that, carry the definite switching channels information of described receiving terminal in the described response message and specifically comprise:
Receiving terminal judges in the described switching channels information list whether available Off-Channel is arranged;
If have, then choose one of them Off-Channel, and return to the transmission terminal by described response message; Or, determine tabulation available switching target channel Off-Channel in addition according to residing wireless environment and channel conditions, and return to the transmission terminal by described response message.
4, as dynamically determining the method for Off-Channel as described in the claim 3, it is characterized in that, also comprise: the reason that described receiving terminal will refuse to set up direct channel by response message is notified described transmission terminal.
5, dynamically determine the method for Off-Channel according to claim 1, it is characterized in that described switching channels information is the administrative class and the channel number of switching channels Off-Channel correspondence.
6, a kind of system that dynamically determines Off-Channel is characterized in that, comprising:
Send terminal, be used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal, send handoff request message to described receiving terminal, described handoff request message is carried the switching channels tabulation; Behind the Off-Channel that receiving terminal is selected, set up direct channel according to described Off-Channel in described tabulation;
Receiving terminal, be used to receive from sending the switching channels tabulation that terminal sends, from described tabulation, select Off-Channel, or determine available switching target channel Off-Channel beyond the tabulation, and return to described transmission terminal by switching response message according to residing wireless environment and channel conditions.
7, as dynamically determining the system of Off-Channel as described in the claim 6, it is characterized in that described transmission terminal specifically comprises:
The channel quality acquiring unit is used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal;
The Off-Channel determining unit of tabulating is used for determining can be used as according to described channel quality the Off-Channel channel list of switching target channel;
The request message transmitting element is used for the channel list that described needs switch is sent to described receiving terminal by request message;
Direct channel is set up the unit, is used at receiving terminal setting up direct channel according to described Off-Channel behind the Off-Channel that described tabulation is selected.
8, as dynamically determining the system of Off-Channel as described in the claim 6, it is characterized in that described receiving terminal specifically comprises:
The request message receiving element is used to receive the request message that sends the terminal transmission, obtains the Off-Channel tabulation;
Selected cell is used for the Off-Channel that adopts in described tabulation selection; Or according to the available switching target channel Off-Channel beyond residing wireless environment and the definite tabulation of channel conditions;
The response message transmitting element, the Off-Channel that is used for selecting returns to described transmission terminal by response message.
As dynamically determining the system of Off-Channel as described in the claim 8, it is characterized in that 9, described response message transmitting element also is used for notifying described transmission terminal with the reason that refusal is set up.
10, a kind of transmission terminal is characterized in that, comprising:
The channel quality acquiring unit is used to obtain the wireless environment and the channel parameter of local terminal and receiving terminal;
The Off-Channel determining unit of tabulating is used for determining the Off-Channel tabulation that needs switch according to described channel quality;
The request message transmitting element is used for the channel list that described needs switch is sent to described receiving terminal by request message;
Direct channel is set up the unit, is used at receiving terminal setting up direct channel according to described Off-Channel behind the Off-Channel that described tabulation is selected.
11, a kind of receiving terminal is characterized in that, comprising:
The request message receiving element is used to receive the request message that sends the terminal transmission, obtains the Off-Channel tabulation;
Selected cell is used for the Off-Channel in described tabulation selection employing, or determines tabulation available switching target channel Off-Channel in addition according to residing wireless environment and channel conditions;
The response message transmitting element, the Off-Channel that is used for selecting returns to described transmission terminal by response message.
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| CN2007103080239A CN101472299B (en) | 2007-12-28 | 2007-12-28 | Method, system and device for dynamically determining Off-Channel |
| PCT/CN2008/073726 WO2009089727A1 (en) | 2007-12-28 | 2008-12-25 | A method, system and device for dynamically determining off-channel |
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| CN2007103080239A CN101472299B (en) | 2007-12-28 | 2007-12-28 | Method, system and device for dynamically determining Off-Channel |
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| CN112205013A (en) * | 2018-05-31 | 2021-01-08 | 皇家飞利浦有限公司 | Apparatus for wireless communication handover |
| CN112205013B (en) * | 2018-05-31 | 2022-12-27 | 皇家飞利浦有限公司 | Apparatus for wireless communication handover |
| TWI827607B (en) * | 2018-05-31 | 2024-01-01 | 荷蘭商皇家飛利浦有限公司 | Device for wireless communication handover |
| CN111988826A (en) * | 2020-09-21 | 2020-11-24 | 展讯通信（上海）有限公司 | STA channel switching method and device under TDLS connection, storage medium and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009089727A1 (en) | 2009-07-23 |
| CN101472299B (en) | 2012-11-07 |
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