Using a frequency error estimate of a first radio access technology (RAT) for a second RAT
AssigneeApple Inc.
InventorLi Su
Life of this patent
Estimating the term…
Abstract
Using a frequency error estimate (FEE) of a first RAT for a second RAT. The UE may include a first radio which supports, e.g., simultaneously, a first radio access technology (RAT) and a second RAT. The first radio may use a lesser frequency of sleep and wake-up cycles when operating according to the first RAT than when operating according to the second RAT. The UE may perform a FEE associated with the first RAT. Accordingly, the UE may skip an FEE associated with the second RAT based on performing the FEE associated with the first RAT.
Claims20
A method, comprising:
- at a user equipment device (UE) comprising a first radio, wherein the first radio is configurable to operate according to a first radio access technology (RAT) and a second RAT:
- operating the first radio of the UE according to the first RAT, wherein the first radio has a lesser frequency of sleep and wake-up cycles when operating according to the first RAT;
- operating the first radio according to the second RAT, wherein the first radio has a greater frequency of sleep and wake-up cycles when operating according to the second RAT;
- wherein the first radio uses a first clock for each of the first RAT and the second RAT, wherein the first clock operates based on an oscillator in the UE;
- when the radio is operating according to the first RAT, after a plurality of cycles of sleep and wake-up for the first RAT, performing a frequency error estimate (FEE) of the first clock and adjusting the first clock based on the FEE, wherein performing the FEE and adjusting the first clock while operating according to the first RAT operates to reduce a frequency of the radio performing a FEE and adjusting the first clock when operating according to the second RAT.
A user equipment device (UE) configured to perform selective neighbor cell measurement, comprising:
- an oscillator;
- a first radio coupled to the oscillator, wherein the first radio is configured to perform communication using a first radio access technology (RAT) and a second RAT and maintain a connection to both the first RAT and the second RAT, and wherein the first radio uses the oscillator for both the first RAT and the second RAT;
- and
- one or more processors coupled to the first radio, wherein the one or more processors and the first radio are configured to:
- configure the first radio using first software associated with the first RAT;
- configure the first radio using second software associated with the second RAT, wherein the first software operates the first radio with a lesser frequency of sleep and wake-up cycles for the first RAT than the second software operates the first radio for the second RAT;
- when the radio is configured using the first software and operating according to the first RAT, the first software performing a frequency error estimate (FEE) of a first clock that is based on the oscillator and adjusting the first clock based on the FEE, wherein the first software performing the FEE operates to reduce a frequency of the second software performing a FEE.
A non-transitory, computer accessible memory medium storing program instructions for performing selective measurement by a user equipment device (UE), wherein the UE comprises a first radio for communicating using a first radio access technology (RAT) and a second RAT, wherein the program instructions are executable by a processor to:
- operate the first radio of the UE according to the first RAT;
- operate the first radio according to the second RAT, wherein the first radio has a lesser frequency of sleep and wake-up cycles when operating according to the first RAT than when operating according to the second RAT, wherein the first radio uses a first clock for each of the first RAT and the second RAT
- when the radio is operating according to the first RAT, perform a frequency error estimate (FEE) of the first clock and adjusting the first clock based on the FEE, wherein performing the FEE and adjusting the first clock when operating according to the first RAT operates to reduce a frequency of the radio performing a FEE and adjusting the first clock when operating according to the second RAT.
Dependencies are inferred from the claim text.