User equipment and method for estimating and updating a timing of a cell in a wireless communications network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsPeter Alriksson, Robert Wolfgang Klang
Life of this patent
Estimating the term…
Abstract
A method in a user equipment for updating a timing of a first cell is provided. The timing is the arrival time of a signal sent from a base station in the first cell relative to a clock in the user equipment in a wireless communication network. The user equipment measures a timing offset for the first cell and respective one or more second cells. When a quality of the timing offset measurement of the first cell is below a first threshold, the user equipment computes a timing offset estimate for the first cell based on the measured timing offset for the respective one or more second cells. The user equipment then updates the timing of the first cell based on the computed timing offset estimate.
Claims10
A method in a user equipment for updating a timing of a first cell, wherein the timing is the arrival time of a signal sent from a base station in the first cell relative to a clock in the user equipment, in a wireless communication network, the method comprising:
- maintaining a timing of a serving cell that serves the user equipment;
- measuring a timing offset for the first cell and for each one of respective one or more second cells, wherein each of the timing offset measurements is a difference between an actual arrival time of a received signal at the user equipment and an expected arrival time of the received signal;
- when a quality of the timing offset measurement of the first cell is below a first threshold,
- computing a timing offset estimate for the first cell based on the timing offset measurements for the respective one or more second cells;
- and
- updating the timing of the first cell based on the computed timing offset estimate.
A user equipment for updating a timing of a first cell, wherein the timing is the arrival time of a signal sent from a base station in the first cell relative to a clock in the user equipment, in a wireless communication network, the user equipment comprising:
- a maintaining circuit configured to maintain a timing of a serving cell that serves the user equipment;
- a measuring circuit configured to measure a timing offset for the first cell and for each one of respective one or more second cells, wherein each of the timing offset measurements is a difference between an actual arrival time of a received signal at the user equipment and an expected arrival time of the received signal;
- a computing circuit configured to compute a timing offset estimate for the first cell based on the timing offset measurements for the respective one or more second cells, when a quality of the timing offset measurement of the first cell is below a first threshold;
- and
- an updating circuit configured to update the timing of the first cell based on the computed timing offset estimate, when said quality of the timing offset measurement of the first cell is below the first threshold.
Dependencies are inferred from the claim text.