Wireless operation in license exempt spectrum

Patent metadata

Field	Value
Publication number	US-10051624-B2
Application number	US-201113991871-A
Country	US
Kind code	B2
Filing date	Dec 6, 2011
Priority date	Dec 6, 2010
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A grant that includes a resource allocation for a subframe set may be communicated. The subframe set may include a subframe resource and another subframe resource following the subframe resource. Sensing, during a sensing time prior to utilization of the subframe resource, that the unlicensed spectrum is available may be performed. Transmitting, based on the sensing, data on the subframe resource and the another subframe resource without further sensing may also be performed.

First claim

What is claimed is:

1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
utilizing, by the WTRU, carrier aggregation with an uplink primary component carrier in licensed spectrum and an uplink secondary component carrier in unlicensed spectrum;
receiving, by the WTRU on a physical downlink control channel (PDCCH) signal on a downlink component carrier, a grant for physical uplink shared channel (PUSCH) transmission on the uplink secondary component carrier, wherein the grant includes a resource allocation for a subframe set;
wherein the subframe set includes a first subframe resource and another subframe resource following the subframe resource; and
sensing, by the WTRU during a sensing time prior to utilization of the subframe resource, that the unlicensed spectrum is available; and
transmitting, based on the sensing, data on the subframe resource and the another subframe resource, wherein the data is transmitted on the another subframe resource without further sensing.

2. The method of claim 1 , wherein at least one of timing and frequency synchronization for the uplink secondary component carrier utilizes at least one of a frame preamble, periodic beacons, or primary and secondary synchronization symbols.

3. A wireless transmit/receive unit (WTRU) comprising:
a processor, electrically coupled to a transceiver, configured to utilize carrier aggregation with an uplink primary component carrier in licensed spectrum and an uplink secondary component carrier in unlicensed spectrum;
the transceiver configured to receive, on a physical downlink control channel (PDCCH) signal on a downlink component carrier, a grant for physical uplink shared channel (PUSCH) transmission on the uplink secondary component carrier, wherein the grant includes a resource allocation for a subframe set;
wherein the subframe set includes a subframe resource and another subframe resource following the subframe resource; and
the processor configured to sense, during a sensing time prior to utilization of the subframe resource, that the unlicensed spectrum is available; and
the transceiver configured to transmit, based on the sense that the unlicensed spectrum is available, data on the subframe resource and the another subframe resource, wherein the data is transmitted on the another subframe resource without further sensing.

4. The method of claim 1 , wherein the sensing time is prior to a start of a subframe with which the sensing time is associated or at a start of a subframe with which the sensing time is associated.

5. The WTRU of claim 3 , wherein the sensing time is prior to a start of a subframe with which the sensing time is associated or at a start of a subframe with which the sensing time is associated.

6. The method of claim 1 further comprising transmitting on a PUSCH of the uplink primary component carrier without performing carrier sensing.

7. The WTRU of claim 3 further comprising the transceiver configured to transmit on a PUSCH of the uplink primary component carrier without performing carrier sensing.

Assignees

• Kaur Samian
• Bala Erdem
• Deng Tao
• Shah Kandarp
• Vanganuru Kiran K
• Pietraski Philip J
• Terry Stephen E
• Yang Rui
• Sternberg Gregory S
• Castor Douglas R
• Pragada Ravikumar V
• Beluri Mihaela C
• Stern Berkowitz Janet A
• Interdigital Patent Holdings Inc

Inventors

• Kaur Samian
• Bala Erdem
• Deng Tao
• Shah Kandarp
• Vanganuru Kiran K
• Pietraski Philip J
• Terry Stephen E
• Yang Rui
• Sternberg Gregory S
• Castor Douglas R
• Pragada Ravikumar V
• Beluri Mihaela C
• Stern-Berkowitz Janet A

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L27/0006

  Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14) · CPC title

• H04L27/2657

  Carrier synchronisation · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title