Abstract
Described herein are methods to enable wireless cellular operation in unlicensed and lightly licensed, (collectively referred to as license exempt spectrum. Cognitive methods are used to enable use of unlicensed bands and/or secondary use of lightly licensed bands. Wireless devices may use licensed exempt spectrum as new bands in addition to the existing bands to transmit to a wireless transmit/receive unit (WTRU) in the downlink direction, or to a base station in the uplink direction. The wireless devices may access license exempt spectrum for bandwidth aggregation or relaying using a carrier aggregation framework. In particular, a primary component carrier operating in a licensed spectrum is used for control and connection establishment and a second component carrier operating in a licensed exempt spectrum is used for bandwidth extension.
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4G | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC | No | Family Member | ||||
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WO2012078565A1 | 4G | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC | Yes | Basis Patent | ||||
WO2012078565A1 | Not Available | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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US2018376479A1 | 5G | 06/12/2020 | ISLD-202011-041 | INTERDIGITAL INC |
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JP2017220956A | Not Available | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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JP2014500685A | Not Available | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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CN103370896A | 5G | 06/12/2020 | ISLD-202011-041 | INTERDIGITAL INC |
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CN103370896B | 4G | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC | No | Family Member | ||||
CN103370896B | Not Available | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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CN103370896B | 5G | 06/12/2020 | ISLD-202011-041 | INTERDIGITAL INC |
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EP2649744A1 | 5G | 06/12/2020 | ISLD-202011-041 | INTERDIGITAL INC |
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Technologies
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Claim
1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
configuring the WTRU for component carrier operation; configuring the WTRU with a primary component carrier for control and connection establishment, the primary component carrier operating in a licensed spectrum; and configuring the WTRU with a second component carrier for bandwidth extension, the second component carrier operating in a licensed exempt spectrum, wherein the second component carrier is a non-backward compatible component carrier, wherein the primary component carrier provides the control for the second component carrier with respect to at least scheduling, synchronization, and feedback signaling.
2. (canceled)
3. The method of claim 1, wherein cross-carrier scheduling is used to schedule the second component carrier.
4. The method of claim 1, wherein a hybrid automatic repeat request is associated with the second component carrier.
5. The method of claim 1, further comprising:
receiving and buffering the second component carrier's downlink shared channel information before a control channel information is completely decoded.
6. The method of claim 1, wherein a schedule of the second component carrier is offset with respect to the primary component carrier, the offset being greater than a control channel duration.
7. (canceled)
8. The method of claim 1, wherein uplink and downlink communications are on different bands of the license exempt spectrum.
9. The method of claim 1, wherein uplink and downlink communications are time shared on a same band in the license exempt spectrum.
10. The method of claim 1, wherein a measurement event for the second component carrier is triggered on entering a coverage area and the second component carrier is added to a configured set.
11. The method of claim 1, wherein synchronization information is derived separately by the licensed exempt transceiver using a preamble.
12. The method of claim 1, wherein timing and frequency synchronization is achieved using at least one of frame preamble, periodic beacons, or primary and secondary synchronization symbols.
13. The method of claim 1, further comprising:
receiving a soft grant for the second component carrier, the soft grant being a transmission opportunity awaiting confirmation of license exempt spectrum availability.
14. The method of claim 1, further comprising:
sending resource availability and control information for the license exempt spectrum on a uplink control channel.
15. The method of claim 1, wherein the WTRU is enabled with an autonomous grant mode wherein the WTRU is configured to sense license exempt spectrum availability before a transmission time interval (TTI) and on a condition of license exempt spectrum availability, the WTRU is configured to send control information on a uplink control channel to the base station.
16. The method of claim 1, further comprising:
configuring the WTRU along with other WTRUs with a sensing opportunity at a given TTI; and transmitting at allocated TTIs on a condition of a positive sensing opportunity.
17. The method of claim 1, further comprising:
semi-statically configuring the WTRU along with other WTRUs with resource blocks; and transmitting on the resource blocks on a condition of a positive sensing opportunity.
18. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to configure the WTRU for component carrier operation; the processor configured to configure the WTRU with a primary component carrier for control and connection establishment, the primary component carrier operating in a licensed spectrum; and the processor configured to configure the WTRU with a second component carrier for bandwidth extension, the second component carrier operating in a licensed exempt spectrum, wherein the second component carrier is a non-backward compatible component carrier and wherein the primary component carrier provides the control for the second component carrier with respect to at least scheduling, synchronization, and feedback signaling.
19. (canceled)
20. (canceled)
Associated Portfolios
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SUMMARY
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.