Simultaneous transmission in multiple timing advance groups
AssigneeTexas Instruments Incorporated
InventorsAnthony Edet Ekpenyong, Ralf Matthias Bendlin, Pierre Bertrand
Life of this patent
Estimating the term…
Abstract
Systems and methods for specifying UE power control allocation for simultaneous transmission of PRACH in a secondary serving cell and PUCCH/PUSCH/SRS in a different serving cell in another timing advance group are disclosed. Rules are provided for prioritizing transmission of PRACH and/or other UL channels/signals. Additionally, UE power allocation is controlled for misaligned subframes across different timing advance groups. Latency of UL synchronization for a secondary serving cell is reduced by prioritizing PRACH retransmission.
Claims22
A method comprising:
- performing by one or more processors in a user equipment device,
- receiving a Physical Downlink Control Channel (PDCCH) order to initiate a random access procedure on a first serving cell;
- identifying a Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), or Sounding Reference Symbol (SRS) transmission for a second serving cell other than the first serving cell;
- transmitting a PRACH transmission to the first serving cell in a subframe;
- and
- transmitting the PUCCH, PUSCH, or SRS transmission to the second serving cell in the same subframe.
A user equipment device, comprising:
- a processor configured to:
- identify a Physical Downlink Control Channel (PDCCH) order to initiate a random access procedure on a first serving cell;
- identify a Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), or Sounding Reference Symbol (SRS) transmission for a second serving cell other than the first serving cell;
- generate a PRACH transmission for the first serving cell in a subframe;
- and
- generate the PUCCH, PUSCH, or SRS transmission for the second serving cell in the same subframe;
- and
- a modem configured to transmit the PUCCH, PUSCH, or SRS transmission to one or more base stations.
A method comprising:
- performing by one or more processors in user equipment,
- identifying a first transmission for a first serving cell during a subframe;
- identifying a second transmission for a second serving cell during the subframe;
- identifying a transmission time difference between the first transmission and the second transmission within the subframe;
- and
- scaling transmission power levels for the first transmission or the second transmission or both prior to a start of the subframe so that a combined transmission power level for the first transmission and the second transmission does not exceed a maximum transmission power for the user equipment.
A user equipment device, comprising:
- a processor configured to:
- identify a first transmission for a first serving cell during a subframe;
- identify a second transmission for a second serving cell during the subframe;
- identify a transmission time difference between the first transmission and the second transmission within the subframe;
- and
- scale transmission power levels for the first transmission or the second transmission or both prior to a start of the subframe so that a combined transmission power level for the first transmission and the second transmission does not exceed a maximum transmission power for the user equipment;
- and
- a modem configured to transmit the first and second transmissions to one or more base stations.
Dependencies are inferred from the claim text.