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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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 network entity configured to be used with a wireless network comprising:
a transmitter;
a receiver configured to receive a random access preamble from a wireless transmit/receive unit (WTRU); and
a processor, operatively coupled to the transmitter and the receiver, configured to:
allocate, in response to the received access preamble, one or more resources to be used for a random access channel (RACH) response in a physical downlink shared channel (PDSCH) to be included in a downlink transmission,
encode, within a subset of a plurality of control channel elements (CCEs), downlink control information (DCI) such that the DCI indicates the allocated one or more resources,
encode the RACH response in the PDSCH, and
generate a downlink transmission, the downlink transmission including a physical downlink control channel (PDCCH) and the PDSCH,
wherein:
the PDCCH includes the plurality of CCEs, and the subset of the plurality of CCEs corresponds to a common portion of the PDCCH such that the common portion of the PDCCH is intended for a plurality of WTRUs and is not addressed to a WTRU-specific identity for the WTRU; and
the transmitter is configured to transmit the generated downlink transmission.
2. The network entity of claim 1, wherein the processor is configured to encode the subset of the plurality of CCEs corresponding to the common portion of the PDCCH.
3. The network entity of claim 1, wherein the subset of the plurality of CCEs comprises transport format information.
4. The network entity of claim 1, wherein the processor is configured to encode the RACH response using information relating to a modulation and coding scheme (MCS) included in the subset of the plurality of CCEs.
5. The network entity of claim 1, wherein the subset of the plurality of CCEs is spread in a time-frequency domain.
6. The network entity of claim 1, wherein the processor is configured to:
determine a random access radio network temporary identifier (RA-RNTI); and
mask a cyclic redundancy check (CRC) using the determined RA-RNTI.
7. The network entity of claim 6, wherein the RA-RNTI is utilized by the plurality of WTRUs.
8. The network entity of claim 1, wherein a starting CCE of the subset of the plurality of CCEs of the PDCCH corresponds to a first CCE in the PDCCH.
9. The network entity of claim 1, wherein the subset of the plurality of CCEs of the PDCCH corresponds to a number of consecutive CCEs in the PDCCH.
10. The network entity of claim 1, wherein the subset of the plurality of CCEs of the PDCCH includes the DCI that comprises a RACH response intended for at least one other WTRU.
11. A method performed by a system in a wireless network, the method comprising:
receiving a random access preamble from a wireless transmit/receive unit (WTRU);
allocating, in response to the received access preamble, one or more resources to be used for a random access channel (RACH) response in a physical downlink shared channel (PDSCH) to be included in a downlink transmission;
encoding, within a subset of a plurality of control channel elements (CCEs), downlink control information (DCI) such that the DCI indicates the allocated one or more resources;
encoding the RACH response in the PDSCH;
generating a downlink transmission, the downlink transmission including a physical downlink control channel (PDCCH) and the PDSCH, wherein the PDCCH includes the plurality of CCEs, and the subset of the plurality of CCEs corresponds to a common portion of the PDCCH such that the common portion of the PDCCH is intended for a plurality of WTRUs and is not addressed to a WTRU-specific identity for the WTRU; and
transmitting the generated downlink transmission.
12. The method of claim 11, further comprising encoding the subset of the plurality of CCEs corresponding to the common portion of the PDCCH.
13. The method of claim 11, wherein the subset of the plurality of CCEs comprises transport format information.
14. The method of claim 11, wherein the encoding of the RACH response comprises encoding the RACH response using information relating to a modulation and coding scheme (MCS) included in the subset of the plurality of CCEs.
15. The method of claim 11, wherein the subset of the plurality of CCEs is spread in a time-frequency domain.
16. The method of claim 11, further comprising:
determining a random access radio network temporary identifier (RA-RNTI); and
masking a cyclic redundancy check (CRC) using the determined RA-RNTI.
17. The method of claim 16, wherein the RA-RNTI is utilized by the plurality of WTRUs.
18. The method of claim 11, wherein a starting CCE of the subset of the plurality of CCEs of the PDCCH corresponds to a first CCE in the PDCCH.
19. The method of claim 11, wherein the subset of the plurality of CCEs of the PDCCH corresponds to a number of consecutive CCEs in the PDCCH.
20. The method of claim 11, wherein the subset of the plurality of CCEs of the PDCCH includes the DCI that comprises a RACH response intended for at least one other WTRU.
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.