Abstract
A method and apparatus for supporting a random access using a random access channel (RACH) are disclosed. The WTRU detects a format of control information in at least one control channel element (CCE) of a common area in a control portion of a downlink transmission. The control information indicates a resource allocation in a data portion of the downlink transmission. The WTRU recovers a random access response assigned to the WTRU from the indicated resource allocation of the data portion on a condition that the at least one CCE has a random access radio network terminal identifier (RA-RNTI) assigned to the WTRU.
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3G | 13/09/2009 | ISLD-200910-006 | INTERDIGITAL INC | No | Family Member | ||||
4G | 13/09/2009 | ISLD-200910-006 | INTERDIGITAL INC |
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4G | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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5G | 07/11/2019 | ISLD-201910-015 | INTERDIGITAL INC |
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No | Family Member |
Specification Information
Specification Information
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CN103747533B | 4G | 13/09/2009 | ISLD-200910-006 | INTERDIGITAL INC |
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CN103747533B | 4G | 30/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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CN103747533B | 5G | 07/11/2019 | ISLD-201910-015 | INTERDIGITAL INC |
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Technologies
Random access
Product
User Equipment (UE/Terminal)
Use Cases
Services
Claim
1. A wireless transmit/receive unit (WTRU), comprising:
a processor configured to:
transmit a random access preamble;
receive a control channel of a downlink transmission, wherein a common control portion of the control channel of the downlink transmission comprises a number of control channel elements (CCEs), and wherein the number of CCEs comprises control information for one or more random access responses;
perform blind decoding within the CCEs of the common control portion of the control channel of the downlink transmission to detect control information intended for the WTRU, wherein the control information comprises a resource allocation to be used for receiving a random access response in a data portion of the downlink transmission; and
process the random access response in the data portion of the downlink transmission in accordance with the resource allocation decoded in the common control portion of the control channel of the downlink transmission.
2. The WTRU of claim 1, wherein the blind decoding is performed using a random access radio network temporary identifier (RA-RNTI) assigned to the WTRU.
3. The WTRU of claim 2, wherein a cyclic redundancy check (CRC) is masked with the RA-RNTI.
4. The WTRU of claim 2, wherein the RA-RNTI is utilized by a plurality of WTRUs.
5. The WTRU of claim 1, wherein the control channel includes a physical downlink control channel (PDCCH), and wherein the data portion includes a physical downlink shared channel (PDSCH).
6. The WTRU of claim 1, wherein a maximum number of CCEs in the common control portion of the control channel of the downlink transmission is specified.
7. The WTRU of claim 1, wherein a starting CCE in the common control portion of the control channel of the downlink transmission corresponds to a first CCE in the control channel of the downlink transmission.
8. The WTRU of claim 1, wherein the number of CCEs in the common control portion of the control channel of the downlink transmission corresponds to a number of consecutive CCEs in the control channel of the downlink transmission.
9. The WTRU of claim 1, wherein the common control portion of the control channel of the downlink transmission comprises control information for a random access response intended for at least one other WTRU.
10. The WTRU of claim 1, wherein the control channel comprises a total number of CCEs, and the number of CCEs in the common control portion is a subset of the total number of CCEs of the control channel.
11. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
transmitting a random access preamble;
receiving a control channel of a downlink transmission, wherein a common control portion of the control channel of the downlink transmission comprises a number of control channel elements (CCEs), and wherein the number of CCEs comprises control information for one or more random access responses;
performing blind decoding within the CCEs of the common control portion of the control channel of the downlink transmission to detect control information intended for the WTRU, wherein the control information comprises a resource allocation to be used for receiving a random access response in a data portion of the downlink transmission; and
processing the random access response in the data portion of the downlink transmission in accordance with the resource allocation decoded in the common control portion of the control channel of the downlink transmission.
12. The method of claim 11, wherein the blind decoding is performed using a random access radio network temporary identifier (RA-RNTI) assigned to the WTRU.
13. The method of claim 12, wherein a cyclic redundancy check (CRC) is masked with the RA-RNTI.
14. The method of claim 11, wherein the control channel includes a physical downlink control channel (PDCCH), and the data portion includes a physical downlink shared channel (PDSCH).
15. The method of claim 12, wherein the RA-RNTI is utilized by a plurality of WTRUs.
16. The method of claim 11, wherein a maximum number of CCEs in the common control portion of the control channel of the downlink transmission is specified.
17. The method of claim 11, wherein a starting CCE in the common control portion of the control channel of the downlink transmission corresponds to a first CCE in the control channel of the downlink transmission.
18. The method of claim 11, wherein the number of CCEs in the common control portion of the control channel of the downlink transmission corresponds to a number of consecutive CCEs in the control channel of the downlink transmission.
19. The method of claim 11, wherein the common control portion of the control channel of the downlink transmission comprises control information for a random access response intended for at least one other WTRU.
20. The method of claim 11, wherein the control channel comprises a total number of CCEs, and the number of CCEs in the common control portion is a subset of the total number of CCEs of the control channel.
Associated Portfolios
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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.