Abstract
ePDCCH may be provided. For example, a WTRU may receive a configuration for monitoring an ePDCCH resource. Based on the configuration, the WTRU may be configured to monitor and may monitor the ePDCCH resource on a particular subframe. Additionally, a WTRU may derive an aggregation level for a subframe associated with an aggregation level number NAL. The WTRU may transmit or monitor an ePDCCH using the aggregation level associated with the NAL for the subframe. A WTRU may also receive a reference signal. The WTRU may then determine the type of reference signal received. The WTRU may perform a demodulation of the PDSCH or ePDCCH using a demodulation timing based on the determined type. The ePDCCH or PDSCH may also be monitored or received by identifying a demodulation reference timing implicitly based on a location of one or more ePDCCH resources where the WTRU may receive DCI.
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JP6514250B2 | 5G | 07/11/2019 | ISLD-201910-015 | INTERDIGITAL INC |
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Technologies
Product
Use Cases
Services
Claim
A method for providing enhanced physical downlink control channel (ePDCCH) in a multiple carrier communication system, the method comprising:
receiving, at a wireless transmit and receive unit (WTRU), a configuration for monitoring an ePDCCH resource; configuring the WTRU to monitor the ePDCCH resource on a subframe based on the configuration; and monitoring, at the WTRU, the ePDCCH resource on the subframe.
2. The method of claim 1, wherein, for at least one of time-division duplex (TDD) or normal downlink cyclic prefix (CP), the subframe is not a special subframe associated with a particular special subframe configuration.
3. The method of claim 2, wherein the particular special subframe configuration comprises at least one of: a special subframe configuration 0 or a special configuration 5.
4. The method of claim 1, wherein the configuration is received via higher layer signalling.
5. The method of claim 4, wherein the configuration further comprises one or more physical resource block (PRB) sets to monitor on the ePDCCH resource.
6. The method of claim 5, wherein the one or more physical resource block (PRB) sets comprise a set of enhanced control channel elements (eCCEs).
7. The method of claim 6, wherein each of the eCCEs comprises enhanced resource element groups (eREGs).
8. The method of claim 7, wherein the number of eREGs per CCE is based on a cyclic prefix (CP) and the subframe.
9. The method of claim 8, wherein the number of eREGs comprises four when the CP comprises a normal CP and the subframe comprises a normal subframe or a special subframe associated with a special subframe configuration of 3, 4, and 8.
10. The method of claim 8, wherein the number of eREGs comprises eight when the CP comprises a normal CP and the subframe comprises a special subframe associated with a special subframe configuration of 1, 2, 6, 7, and 9 or when the CP comprises an extended CP and the subframe comprises a special subframe associated with a special subframe configuration of 1, 2, 3, 5, and 6.
11. The method of claim 6, wherein the set of eCCEs may be numbered from 0 to NECCE,p,k?1 where NECCE,p,k is the number of eCCEs in a particular PRB set p of the one or more PRBs sets associated with the subframe denoted by k.
12. The method of claim 4, wherein the ePDCCH resource monitored on the subframe based on the configuration signalled by the higher layers comprises a UE-specific search space.
13. The method of claim 12, further comprising monitoring, at the WTRU, a PDCCH resource on a subframe not configured for monitoring the ePDCCH resource based on the configuration.
14. The method of claim 13, wherein the PDCCH resource monitored comprises a common search space.
15. The method of claim 1, further comprising demodulating the ePDCCH resource using an antenna port for a channel estimation, wherein a DM-RS scrambling sequence for the antenna ports is configured to be initialized by cinit=(?ns/2?+1)�(2NID EPDCCH+1)�216+nSCID EPDCCH, wherein nSCID EPDCCH is configured by UE-specific higher layer signalling.
16. The method of claim 1, wherein candidates for the ePDCCH resource of the subframe is selected based on a hashing function, wherein the hashing function is different for each ePDCCH resource.
17. A wireless transmit and receive unit (WTRU) configured to:
derive an aggregation level associated with one or more enhanced control channel elements (eCCEs) for a subframe associated with an aggregation level number NAL for the subframe, wherein NAL is a positive integer; and transmit an ePDCCH using the aggregation level associated with the NAL for the subframe.
18. The WTRU of claim 17, wherein the aggregation level for the subframe is different than an aggregation level for another subframe.
19. The WTRU of claim 17, wherein the aggregation level is derived as NAL�{1, 2, 4, 8}.
20. The WTRU of claim 17, wherein NAL equals two and the aggregation level comprises {2, 4, 8, 16}.
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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.
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