Physical random access channel design for licensed assisted access
AssigneeIntel IP Corporation
InventorsQiaoyang Ye, Jeongho Jeon, Seau S. Lim, Huaning Niu, Abhijeet Bhorkar
Life of this patent
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Abstract
An apparatus is configured to be employed within one or more user equipment (UE). The apparatus includes control circuitry and a transceiver. The control circuitry is configured to generate a physical random access channel (PRACH), wherein the PRACH includes a preamble for PRACH transmission using a license assisted access (LAA) secondary cell. The transceiver is coupled to the control circuitry and is configured to retry transmission of the PRACH on a listen before talk (LBT) failure based of the secondary cell.
Claims25
1-25. (canceled)
An apparatus configured to be employed within one or more user equipment (UE), the apparatus comprising:
- control circuitry configured to generate a physical random access channel (PRACH), wherein the PRACH includes a preamble for PRACH transmission using a license assisted access (LAA) secondary cell;
- and
- a transceiver coupled to the control circuitry and configured to retry transmission of the PRACH on a listen before talk (LBT) failure of the secondary cell.
An apparatus configured to be employed within one or more evolved Node Bs (eNodeBs), the apparatus comprising:
- control circuitry configured to generate a physical downlink control channel (PDCCH), wherein the PDCCH includes a PDCCH order for contention free PRACH transmission using a license assisted access (LAA) secondary cell, and generate a random access response (RAR) within a RAR window using the secondary cell;
- and
- a transceiver configured to retry transmission of the RAR on a listen before talk (LBT) failure based on the secondary cell.
One or more computer-readable media having instructions that, when executed, cause one or more user equipment (UE) to:
- generate a physical random access channel (PRACH) for contention free PRACH transmission using a license assisted access (LAA) secondary cell, wherein the PRACH includes a PRACH preamble;
- perform a listen before talk (LBT) on the secondary cell;
- transmit the PRACH preamble using the secondary cell on a success of the LBT;
- and
- retry transmission of the PRACH preamble using the secondary cell on a failure of LBT.
Dependencies are inferred from the claim text.