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US 2014/0177602 A1Published application
Uplink timing management and uplink power control
AssigneeQUALCOMM Incorporated
InventorsWanshi Chen, Peter Gaal, Hao Xu
Life of this patent
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Abstract
Certain aspects of the present disclosure relate to techniques for uplink timing management and uplink power control in wireless communications systems. A UE may detect a switch in a set of one or more transmission points (TPs) for at least one of uplink (UL) transmissions or (DL) transmissions. The uplink timing management may include the UE determining one or more DL component carriers (CCs) to use as a Timing Advance (TA) reference after the switch. The uplink power control may include a UE determining, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
Claims73
A method for adjusting timing of uplink transmissions by a UE, comprising:
- performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjusting timing for UL transmissions based on received timing adjustment (TA) commands and timing of at least one DL component carrier (CC) used by the second set of TPs that is used by the UE as a TA reference;
- detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determining one or more DL CCs to use as a TA reference after the switch.
2 more elements
A method for adjusting timing of uplink transmissions by a base station, comprising:
- sending timing adjustment (TA) commands to at least one UE, wherein the at least one UE adjusts timing for uplink (UL) transmissions based on received TA commands and timing of at least one DL component carrier (CC) used by a set of TPs that is used by the UE as a TA reference;
- and
- sending an indication to the at least one UE of one or more DL CCs to use as a TA reference after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions.
A method for adjusting power of uplink transmissions by a UE, comprising:
- performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjusting transmission power for one or more UL channels according to one or more power control functions based on received transmission power control (TPC) commands;
- detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determining, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
2 more elements
A method for adjusting power of uplink transmissions by a base station, comprising:
- sending transmission power control (TPC) commands to at least one UE, wherein the at least one UE adjusts transmission power for one or more uplink (UL) channels according to one or more power control functions that are based on received TPC commands;
- and
- sending an indication to the at least one UE of one or more serving transmission points (TPs) after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions,
- wherein the at least one UE determines, based at least in part on the one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
1 more element
An apparatus for adjusting timing of uplink transmissions by a UE, comprising:
- means for performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- means for adjusting timing for UL transmissions based on received timing adjustment (TA) commands and timing of at least one DL component carrier (CC) used by the second set of TPs that is used by the UE as a TA reference;
- means for detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- means for determining one or more DL CCs to use as a TA reference after the switch.
2 more elements
An apparatus for adjusting timing of uplink transmissions by a UE, comprising:
- at least one processor configured to:
- perform wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjust timing for UL transmissions based on received timing adjustment (TA) commands and timing of at least one DL component carrier (CC) used by the second set of TPs that is used by the UE as a TA reference;
- detect a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determine one or more DL CCs to use as a TA reference after the switch;
- and
- a memory coupled to the at least one processor.
5 more elements
A computer program product for adjusting timing of uplink transmissions by a UE, comprising:
- a computer-readable medium comprising instructions for:
- performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjusting timing for UL transmissions based on received timing adjustment (TA) commands and timing of at least one DL component carrier (CC) used by the second set of TPs that is used by the UE as a TA reference;
- detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determining one or more DL CCs to use as a TA reference after the switch.
3 more elements
An apparatus for adjusting timing of uplink transmissions by a base station, comprising:
- means for sending timing adjustment (TA) commands to at least one UE, wherein the at least one UE adjusts timing for uplink (UL) transmissions based on received TA commands and timing of at least one DL component carrier (CC) used by a set of TPs that is used by the UE as a TA reference;
- and
- means for sending an indication to the at least one UE of one or more DL CCs to use as a TA reference after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions.
An apparatus for adjusting timing of uplink transmissions by a base station, comprising:
- at least one processor configured to:
- send timing adjustment (TA) commands to at least one UE, wherein the at least one UE adjusts timing for uplink (UL) transmissions based on received TA commands and timing of at least one DL component carrier (CC) used by a set of TPs that is used by the UE as a TA reference;
- and
- send an indication to the at least one UE of one or more DL CCs to use as a TA reference after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions;
- and
- a memory coupled to the at least one processor.
3 more elements
A computer program product for adjusting timing of uplink transmissions by a base station, comprising:
- a computer-readable medium comprising code for:
- sending timing adjustment (TA) commands to at least one UE, wherein the at least one UE adjusts timing for uplink (UL) transmissions based on received TA commands and timing of at least one DL component carrier (CC) used by a set of TPs that is used by the UE as a TA reference;
- and
- sending an indication to the at least one UE of one or more DL CCs to use as a TA reference after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions.
1 more element
An apparatus for adjusting power of uplink transmissions by a UE, comprising:
- means for performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- means for adjusting transmission power for one or more UL channels according to one or more power control functions based on received transmission power control (TPC) commands;
- means for detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- means for determining, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
2 more elements
An apparatus for adjusting power of uplink transmissions by a UE, comprising:
- at least one processor configured to:
- perform wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjust transmission power for one or more UL channels according to one or more power control functions based on received transmission power control (TPC) commands;
- detect a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determine, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch;
- and
- a memory coupled to the at least one processor.
5 more elements
A computer program product for adjusting power of uplink transmissions by a UE, comprising:
- a computer-readable medium comprising instruction for:
- performing wireless communications with uplink (UL) transmissions sent to a first set of one or more transmission points (TPs) and downlink (DL) transmissions received from a second set of one or more TPs;
- adjusting transmission power for one or more UL channels according to one or more power control functions based on received transmission power control (TPC) commands;
- detecting a switch to a different set of one or more TPs for at least one of the first or second set of TPs;
- and
- determining, based at least in part on one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
3 more elements
An apparatus for adjusting power of uplink transmissions by a base station, comprising:
- means for sending transmission power control (TPC) commands to at least one UE, wherein the at least one UE adjusts transmission power for one or more uplink (UL) channels according to one or more power control functions that are based on received TPC commands;
- and
- means for sending an indication to the at least one UE of one or more serving transmission points (TPs) after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions,
- wherein the at least one UE determines, based at least in part on the one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
1 more element
An apparatus for adjusting power of uplink transmissions by a base station, comprising:
- at least one processor configured to:
- send transmission power control (TPC) commands to at least one UE, wherein the at least one UE adjusts transmission power for one or more uplink (UL) channels according to one or more power control functions that are based on received TPC commands;
- and
- send an indication to the at least one UE of one or more serving transmission points (TPs) after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions,
- wherein the at least one UE determines, based at least in part on the one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch;
- and
- a memory coupled to the at least one processor.
4 more elements
A computer program product for adjusting power of uplink transmissions by a base station, comprising:
- a computer-readable medium comprising instructions for:
- sending transmission power control (TPC) commands to at least one UE, wherein the at least one UE adjusts transmission power for one or more uplink (UL) channels according to one or more power control functions that are based on received TPC commands;
- and
- sending an indication to the at least one UE of one or more serving transmission points (TPs) after a dynamic switch to a different set of one or more TPs for at least one of UL transmissions and downlink (DL) transmissions,
- wherein the at least one UE determines, based at least in part on the one or more serving TPs after the switch, one or more power control functions to be utilized for transmission power for one or more UL channels after the switch.
2 more elements
Dependencies are inferred from the claim text.