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US 8,948,126 B2Granted
Scheduling TDD-LTE measurement in TD-SCDMA systems
AssigneeQUALCOMM Incorporated
InventorsTom Chin, Guangming Shi, Kuo-Chun Lee
Life of this patent
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Abstract
Certain aspects of the present disclosure propose techniques for performing a time division duplex-long term evolution (TDD-LTE) measurement in a time division synchronous code division multiple access (TD-SCDMA) system. Certain aspects provide a method that generally includes obtaining measurements of downlink (DL) transmission from a base station (BS) of a second radio access technology (RAT), maintaining uplink (UL) transmission with a BS of a first RAT while obtaining the measurements, and performing network acquisition operations with the BS of the second RAT based on the measurements.
Claims46
A method for wireless communications, comprising:
- tuning away from a first radio access technology (RAT) to a second RAT during a first downlink time slot of a subframe of the first RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- obtaining measurements of downlink (DL) transmission from the second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT;
- tuning away from the second RAT to the first RAT before a transition from a last uplink time slot of the subframe of the first RAT to a second downlink time slot of the subframe of the first RAT;
- and
- acquiring the second RAT based at least in part on the measurements.
2 more elements
An apparatus for wireless communications, comprising:
- means for tuning away from a first radio access technology (RAT) to a second RAT during a first downlink time slot of a subframe of the first RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- means for obtaining measurements of downlink (DL) transmission from the second RAT including means for acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT;
- means for tuning away from the second RAT to the first RAT before a transition from a last uplink time slot of the subframe of the first RAT to a second downlink time slot of the subframe of the first RAT;
- and
- means for acquiring the second RAT based at least in part on the measurements.
2 more elements
An apparatus for wireless communications, comprising:
- at least one processor adapted to:
- tune away from a first radio access technology (RAT) to a second RAT during a first downlink time slot of a subframe of the first RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- obtain measurements of downlink (DL) transmission from the second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT;
- tune away from the second RAT to the first RAT before a transition from a last uplink time slot of the subframe of the first RAT to a second downlink time slot of the subframe of the first RAT;
- and
- acquire the second RAT based at least in part on the measurements;
- and
- a memory coupled to the at least one processor.
5 more elements
A computer-program product, comprising:
- a non-transitory computer-readable medium comprising code for:
- tuning away from a first radio access technology (RAT) to a second RAT during a first downlink time slot of a subframe of the first RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- obtaining measurements of downlink (DL) transmission from the second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT;
- tuning away from the second RAT to the first RAT before a transition from a last uplink time slot of the subframe of the first RAT to a second downlink time slot of the subframe of the first RAT;
- and
- acquiring the second RAT based at least in part on the measurements.
3 more elements
A method for wireless communications, comprising:
- sending, from a base station (BS) of a first radio access technology (RAT), a command to a user equipment (UE), wherein the command instructs the UE to obtain measurements of downlink (DL) transmission from a BS of a second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- allowing the UE to tune away from the second RAT to the first RAT during a first downlink time slot of a subframe of the first RAT;
- maintaining uplink (UL) transmission with the UE while the UE obtains the measurements;
- and
- refraining from allocating traffic channels to the UE between a first downlink time slot of a subframe of the first RAT and a transition from a last uplink time slot of a subframe of the first RAT to a second downlink time slot of the subframe of the first RAT when the UE obtains measurements.
2 more elements
An apparatus for wireless communications, comprising:
- means for sending, from a base station (BS) of a first radio access technology (RAT), a command to a user equipment (UE), wherein the command instructs the UE to obtain measurements of downlink (DL) transmission from a BS of a second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- means for maintaining uplink (UL) transmission with the UE while the UE obtains the measurements;
- and
- means for refraining from allocating traffic channels to the UE between a first downlink time slot of a subframe of the first RAT and a transition from a last uplink time slot of a subframe of the first RAT to a second downlink time slot of the subframe of the first RAT when the UE obtains measurements.
1 more element
An apparatus for wireless communications, comprising:
- at least one processor adapted to:
- send, from a base station (BS) of a first radio access technology (RAT), a command to a user equipment (UE), wherein the command instructs the UE to obtain measurements of downlink (DL) transmission from a BS of a second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- maintain uplink (UL) transmission with the UE while the UE obtains the measurements;
- refrain from allocating traffic channels to the UE between a first downlink time slot of a subframe of the first RAT and a transition from a last uplink time slot of a subframe of the first RAT to a second downlink time slot of the subframe of the first RAT when the UE obtains measurements;
- and
- a memory coupled to the at least one processor.
3 more elements
A computer-program product, comprising:
- a non-transitory computer-readable medium comprising code for:
- sending, from a base station (BS) of a first radio access technology (RAT), a command to a user equipment (UE), wherein the command instructs the UE to obtain measurements of downlink (DL) transmission from a BS of a second RAT including acquiring a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH) of the second RAT, a frame boundary of the first RAT being aligned with a frame boundary of the second RAT;
- maintaining uplink (UL) transmission with the UE while the UE obtains the measurements;
- and
- refraining from allocating traffic channels to the UE between a first downlink time slot of a subframe of the first RAT and a transition from a last uplink time slot of a subframe of the first RAT to a second downlink time slot of the subframe of the first RAT when the UE obtains measurements.
2 more elements
Dependencies are inferred from the claim text.