METHOD AND APPARATUS FOR OPERATING IN A DISCONTINUOUS RECEPTION MODE EMPLOYING CARRIER AGGREGATION

• US 20170164421A1
• Filed: 02/17/2017
• Published: 06/08/2017
• Est. Priority Date: 06/18/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Marinier, Paul, Terry, Stephen E., Gauvreau, Jean-Louis
• Granted Patent: US 10,172,087 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods and apparatus are described. A long term evolution-advanced (LTE-A) wireless transmit/receive unit (WTRU) includes a transceiver and a processor. The transceiver receives discontinuous reception (DRX) configuration information. The processor, in response to the received DRX information, controls the transceiver to monitor LTE-A physical downlink control channels (PDCCHs) in subframes in a first frequency band during an active time. The processor further, in response to detecting a downlink assignment in an LTE-A PDCCH in the first frequency band during the active time, wherein the downlink assignment indicates a second frequency band and assigned subcarriers within the second frequency band, to receive an LTE-A physical downlink shared channel (PDSCH) K subframes after a transmission of the downlink assignment. The second frequency band is different than the first frequency band.

Claims

1. A long term evolution-advanced (LTE-A) wireless transmit/receive unit (WTRU), the LTE-A WTRU comprising:

a transceiver configured to receive discontinuous reception (DRX) configuration information;

a processor, in response to the received DRX configuration information, configured to control the transceiver to monitor LTE-A physical downlink control channels (PDCCHs) in subframes in a first frequency band during an active time; and

the processor is further configured, in response to detecting a downlink assignment in an LTE-A PDCCH in the first frequency band during the active time, wherein the downlink assignment indicates a second frequency band and assigned subcarriers within the second frequency band, to receive an LTE-A physical downlink shared channel (PDSCH) K subframes after a transmission of the downlink assignment, wherein the second frequency band is different than the first frequency band.

2. The LTE-A WTRU of claim 1, wherein K subframes is two subframes.

3. The LTE-A WTRU of claim 1, wherein the K subframes allows for PDCCH processing time and activation for the second frequency band.

4. The LTE-A WTRU of claim 1, wherein the processor is further configured, in response to detecting a second downlink assignment in an LTE-A PDCCH during the active time, wherein the second downlink assignment indicates the first frequency and assigned subcarriers within the first frequency band, to receive an LTE-A physical downlink shared channel (PDSCH) K subframes after a transmission of the second downlink assignment.

5. A method implemented by a long term evolution-advanced (LTE-A) wireless transmit/receive unit (WTRU), the method comprising:

receiving, by the LTE-A WTRU, discontinuous reception (DRX) configuration information;

in response to the received DRX configuration information, monitoring, by the LTE-A WTRU, LTE-A physical downlink control channels (PDCCHs) in subframes in a first frequency band during an active time; and

in response to detecting a downlink assignment in an LTE-A PDCCH in the first frequency band during the active time, wherein the downlink assignment indicates a second frequency band and assigned subcarriers within the second frequency band, receiving, by the LTE-A WTRU, an LTE-A physical downlink shared channel (PDSCH) K subframes after a transmission of the downlink assignment, wherein the second frequency band is different than the first frequency band.

6. The method of claim 5, wherein K subframes is two subframes.

7. The method of claim 5, wherein the K subframes allows for PDCCH processing time and activation for the second frequency band by the LTE-A WTRU.

8. The method of claim 5, further comprising in response to detecting a second downlink assignment in an LTE-A PDCCH during the active time, wherein the second downlink assignment indicates the first frequency and assigned subcarriers within the first frequency band, receiving an LTE-A physical downlink shared channel (PDSCH) K subframes after a transmission of the second downlink assignment.

9. A long term evolution-advanced (LTE-A) eNodeB, the LTE-A eNodeB comprising:

a processor configured to control a transceiver to transmit discontinuous reception (DRX) configuration information to an LTE-A wireless transmit/receive unit (WTRU);

the processor is further configured to have the transceiver transmit an LTE-A physical downlink control channel (PDCCH) in at least one subframe in an active time in a first frequency band having a downlink assignment for the LTE-A WTRU, wherein the active time is based on the DRX configuration information, wherein the downlink assignment indicates a second frequency band and assigned subcarriers within the second frequency band; and

the processor is further configured to have the transceiver transmit an LTE-A physical downlink shared channel (PDSCH) K subframes after transmission of the downlink assignment, wherein the second frequency band is different than the first frequency band.

10. The LTE-A eNodeB of claim 9, wherein K subframes is two subframes.

11. The LTE-A eNodeB of claim 9, wherein the K subframes allows for PDCCH processing time and activation for the second frequency band by the LTE-A WTRU.

12. The LTE-A eNodeB of claim 9, wherein the processor is further configured to have the transceiver transmit an LTE-A physical downlink control channel (PDCCH) in at least one subframe in an active time in the first frequency band having a second downlink assignment for the LTE-A WTRU, wherein the second downlink assignment indicates the first frequency band and assigned subcarrier with the first frequency band, and the processor is further configured to have the transceiver transmit an LTE-A PDSCH K subframes after transmission of the second downlink assignment.