IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0351588
(2012-01-17)
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등록번호 |
US-RE45212
(2014-10-28)
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발명자
/ 주소 |
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출원인 / 주소 |
- Intellectual Ventures I LLC
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인용정보 |
피인용 횟수 :
1 인용 특허 :
81 |
초록
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Disclosed herein are exemplary techniques for the communication of information in a wireless system by using multiple wireless channels. A direct link between two or more wireless devices may be established by performing a direct link setup between two or more wireless devices using an access point,
Disclosed herein are exemplary techniques for the communication of information in a wireless system by using multiple wireless channels. A direct link between two or more wireless devices may be established by performing a direct link setup between two or more wireless devices using an access point, where the direct link setup is conducted over a base channel and the direct link is established on a parallel channel. The two or more wireless devices may switch to the parallel channel and use the established direct link to communicate information directly without the access point as an intermediary. In anticipation of a predetermined event, such as the transmission of a delivery traffic indication map (DTIM) beacon frame by the access point, the two or more wireless devices may switch back to the base channel so that uplink, downlink and/or peer-to-peer information may be transmitted and/or received.
대표청구항
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1. In an 802.11x wireless network comprising an access point logically connected to at least a first wireless device and a second wireless device, a method of establishing a point-to-point connection directly between the first and second wireless devices comprising: sending a setup request frame fro
1. In an 802.11x wireless network comprising an access point logically connected to at least a first wireless device and a second wireless device, a method of establishing a point-to-point connection directly between the first and second wireless devices comprising: sending a setup request frame from the first wireless device to the second wireless device on a first communication channel via the access point, the setup request frame including a proposed second communication channel;sending a setup response frame from the second wireless device to the first wireless device on the first communication channel via the access point; andcommunicating information directly between the first and second wireless devices on the second communication channel for a first time period. 2. The method as in claim 1, further comprising: switching the first and second wireless devices from the second channel to the first channel in anticipation of a predetermined event; andcommunicating information between the access point and at least one of the first and second wireless devices via the first channel for at least a portion of a second time period. 3. The method as in claim 2, further comprising: switching the first and second wireless devices from the second channel to the first channel prior to the second time period. 4. The method as in claim 2, further comprising: switching the first and second wireless devices from the second channel to a third channel; andcommunicating, for a third time period, information directly between the first and second wireless devices the second channel. 5. The method as in claim 4, wherein switching the wireless devices to the third channel comprises: providing a setup confirmation from the first wireless device to the second wireless device via the access point, the setup confirmation confirming the suitability of a wireless direct link on the third channel;switching the first wireless device to the third channel subsequent to the transmission of the setup confirmation; andswitching the second wireless device to the third channel subsequent to the receipt of the setup confirmation. 6. The method as in claim 5, wherein establishing the second wireless direct link on the third channel comprises: providing, on the second channel, a setup request from the first wireless device to the second wireless device via the access point, the setup request including one or more identifiers of the third channel; andproviding, on the second channel, an affirmative setup response from the second wireless device to the second wireless device via the access point in response to a receipt of the setup request at the second device;wherein the setup confirmation is provided in response to a receipt of the affirmative setup response at the first wireless device. 7. The method as in claim 6, wherein the one or more identifiers of the third channel includes a center frequency and a channel width. 8. The method as in claim 7, further comprising: scanning at least one channel to identify an unused channel, the unused channel being selected as the third channel. 9. The method as in claim 7, further comprising: randomly selecting one of a plurality of channels as the third channel. 10. The method as in claim 2, wherein the predetermined event includes a substantially periodic event. 11. The method as in claim 10, wherein the predetermined event includes a periodic transmission of an indication of information buffered at the access point, wherein at least a portion of the buffered information is intended for receipt by at least one of the first and second wireless devices. 12. The method as in claim 11, wherein the indication from the access point includes a delivery traffic indication map (TIM) beacon frame. 13. The method as in claim 10, wherein the predetermined event includes the delivery of broadcast and multicast data. 14. The method as in claim 1, wherein the second channel includes a base channel for communicating information between the access point to at least the first and second wireless devices. 15. In an 802.11x wireless network comprising an access point operably connected to at least a first wireless device and a second wireless device, a method of establishing a direct point-to-point connection between the two wireless devices comprising: providing information between the access point and at least one of the first and second wireless devices via a first channel for at least a portion of a first period;providing a channel change request from the first wireless device to the second wireless device on the first channel;providing an affirmative response to the channel change request from the second wireless device to the first wireless device on the first channel;switching the second wireless device to a second channel subsequent to the receipt of the acknowledgement to the provision of the affirmative response to the channel change request;switching the first wireless device to the second channel subsequent to the transmission of the acknowledgement to the receipt of the affirmative response to the channel change request; andcommunicating information directly between the first and second wireless devices via the second channel for at least a portion of a second period,wherein the 802.11x wireless network is configured to facilitate communications in an 802.11x protocol, andwherein the first channel is different than the second channel. 16. The method as in claim 15, wherein the channel change request includes an indication of a proposed center frequency and channel width for the second channel and wherein the affirmative response to the channel change request includes an affirmation of the proposed center frequency and channel width for the second channel. 17. The method as in claim 15, wherein the information communicated during at least a portion of the second period includes information buffered at the access point during the first period and having at least one of the first and second wireless devices as an intended recipient. 18. The method as in claim 15, wherein the first and second wireless devices switch from the first channel to the second channel in anticipation of a predetermined event. 19. The method as in claim 18, wherein the predetermined event includes a substantially periodic event. 20. The method as in claim 19, wherein the predetermined event includes a periodic transmission of an indication of information buffered at the access point, wherein at least a portion of the buffered information is intended for receipt by at least one of the first and second wireless devices. 21. The method as in claim 20, wherein the indication from the access point includes a delivery traffic indication map (TIM) frame. 22. In a wireless network having an access point, at least one wireless device comprising: a transceiver; anda direct link module operably connected to the transceiver and configured to: facilitate an establishment of a wireless direct link between the wireless device and another wireless device on the network via a second frequency channel;communicate information with the other wireless device via the wireless direct link on the second frequency channel for at least a portion of a first period;switch the transceiver from the second frequency channel to a base channel in anticipation of a predetermined event; andcommunicate information with the access point via the base channel for at least a portion of a second period,wherein the second frequency channel is different than the base channel. 23. The wireless device as in claim 22, wherein the direct link module is adapted to facilitate the establishment of the wireless direct link by: providing a channel setup request to the other wireless device via the access point and the base channel;receiving an affirmative response to the setup request from the other wireless device via the base channel;providing a setup confirmation to the other wireless device via the base channel; andtuning the transceiver to the second channel subsequent to the provision of the setup confirmation. 24. The wireless device as in claim 23, wherein the setup request includes an indication of a proposed center frequency and channel width for the second channel. 25. The wireless device as in claim 22, wherein the direct link module is adapted to facilitate the establishment of the wireless direct link by: receiving a channel setup request from the other wireless device via the access point and the base channel;providing an affirmative response to the setup request to the other wireless device via the base channel;receiving a setup confirmation from the other wireless device via the base channel; andtuning the transceiver to the second channel subsequent to the receipt of the setup confirmation. 26. The wireless device as in claim 25, wherein the setup request includes an indication of a proposed center frequency and channel width for the second channel. 27. The wireless device as in claim 26, wherein the direct link module is adapted to facilitate the establishment of the wireless direct link by: providing a channel change request to the other wireless device via the access point;receiving an affirmative response to the channel request from the other wireless device via the access point;tuning the transceiver to the second channel subsequent to the receipt of the affirmative response. 28. The wireless device as in claim 22, wherein the direct link module is adapted to facilitate the establishment of the wireless direct link by: receiving a channel change request from the other wireless device via the access point;providing an affirmative response to the channel request to the other wireless device via the access point; andtuning the transceiver to the second channel subsequent to the provision of the affirmative response. 29. The wireless device as in claim 22, wherein the predetermined event includes a substantially periodic event. 30. The wireless device as in claim 29, wherein the predetermined event includes a periodic transmission of an indication of information buffered at the access point during the first period, wherein at least a portion of the buffered information is intended for receipt by at least one of the first and second wireless devices. 31. The wireless device as in claim 30, wherein the indication from the access point includes a delivery traffic indication map (TIM) frame. 32. The wireless device as in claim 22, further comprising: at least one processor; andwherein the direct link module includes executable instructions adapted to manipulate the processor to:facilitate the establishment of the wireless direct link;communicate information with the other wireless device via the wireless direct link;switch the transceiver from the first channel to the base channel in anticipation of the predetermined event; andcommunicate information with the access point via the wireless direct link on the base channel. 33. A wireless system comprising: an access point; andat least a first wireless device and a second wireless device;wherein the first wireless device and the second wireless device are configured to: communicate information via a wireless direct link on a first channel during at least a portion of a first period;switch to a second channel in anticipation of a predetermined event; andcommunicate information with the access point on the second channel during at least a portion of a second period,wherein the first channel is different than the second channel. 34. The wireless system as in claim 33, wherein the predetermined event includes a substantially periodic event. 35. The wireless system as in claim 34, wherein the predetermined event includes a periodic transmission of an indication of information buffered at the access point during the first period, wherein at least a portion of the buffered information is intended for receipt by at least one of the first and second wireless devices. 36. The wireless system as in claim 35, wherein the indication from the access point includes a delivery traffic indication map (DTIM) frame. 37. A method comprising: sending, from a first wireless device, a setup request frame to a second wireless device on a first communication channel via an access point, wherein the setup request frame comprises a proposed second communication channel;receiving a setup response frame, at the first wireless device from the second wireless device, on the first communication channel via the access point, wherein the setup response frame comprises a proposed third communication channel;sending, from the first wireless device, a setup confirm frame to the second wireless device on the first communication channel via the access point; andcommunicating information directly between the first wireless device and the second wireless device on the third communication channel. 38. The method of claim 37, further comprising returning to the first communication channel after a time period. 39. The method of claim 37, wherein the setup confirm frame comprises an indication to the access point that the first wireless device is entering a power-saving mode. 40. The method of claim 37, further comprising: returning to the first communication channel after a time period; andreceiving, at the first wireless device, buffered data from the access point. 41. The method of claim 37, further comprising: scanning the third communication channel;determining an amount of traffic on the third communication channel; andsuspending use of the third communication channel by the first wireless device and the second wireless device based upon the amount of traffic on the third communication channel. 42. The method of claim 41, further comprising transmitting a channel switch request based upon the amount of traffic on the third communication channel, wherein the channel switch request comprises a proposed fourth communication channel. 43. The method of claim 37, further comprising: periodically returning to the first communication channel for a period of time; andreturning to the third communication channel after the period of time. 44. A wireless device comprising: one or more processors configured to:control sending, to another wireless device, a setup request frame on a first communication channel via an access point, wherein the setup request frame comprises a proposed second communication channel;control receiving a setup response frame from the other wireless device on the first communication channel via the access point, wherein the setup response frame comprises a proposed third communication channel;control sending a setup confirm frame to the other wireless device on the first communication channel via the access point; andcontrol communicating information directly with the other wireless device on the third communication channel. 45. The wireless device of claim 44, wherein the one or more processors are further configured to control returning to the first communication channel after a time period. 46. The wireless device of claim 44, wherein the setup confirm frame comprises an indication to the access point that the wireless device is entering a power-saving mode. 47. The wireless device of claim 44, wherein the one or more processors are further configured to: control returning to the first communication channel after a time period; andcontrol receiving buffered data from the access point. 48. The wireless device of claim 44, wherein the one or more processors are further configured to: control scanning the third communication channel; determine an amount of traffic on the third communication channel; andsuspend use of the third communication channel by the wireless device and the other wireless device based upon the amount of traffic on the third communication channel. 49. The wireless device of claim 48, wherein the one or more processors are further configured to control transmitting a channel switch request based upon the amount of traffic on the third communication channel, wherein the channel switch request comprises a proposed fourth communication channel. 50. The wireless device of claim 44, wherein the one or more processors are further configured to: control periodically returning to the first communication channel for a period of time; andcontrol returning to the third communication channel after the period of time. 51. A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising: instructions to control sending, to another wireless device, a setup request frame on a first communication channel via an access point, wherein the setup request frame comprises a proposed second communication channel;instructions to control receiving a setup response frame from the other wireless device on the first communication channel via the access point, wherein the setup response frame comprises a proposed third communication channel;instructions to control sending a setup confirm frame to the other wireless device on the first communication channel via the access point; andinstructions to control communicating information directly with the other wireless device on the third communication channel. 52. The non-transitory computer-readable medium of claim 51, further comprising instructions to control returning to the first communication channel after a time period. 53. The non-transitory computer-readable medium of claim 51, wherein the setup confirm frame comprises an indication to the access point that the wireless device is entering a power-saving mode. 54. The non-transitory computer-readable medium of claim 51, further comprising instructions to: instructions to control returning to the first communication channel after a time period; andinstructions to control receiving buffered data from the access point. 55. The non-transitory computer-readable medium of claim 51, further comprising: instructions to control scanning the third communication channel;instructions to determine an amount of traffic on the third communication channel; and instructions to suspend use of the third communication channel by the wireless device and the other wireless device based upon the amount of traffic on the third communication channel. 56. The non-transitory computer-readable medium of claim 55, further comprising instructions to control transmitting a channel switch request based upon the amount of traffic on the third communication channel, wherein the channel switch request comprises a proposed fourth communication channel.
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