Cell re-selection in a device configured to operate according to multiple cellular communication protocols

摘要

Cell re-selection in a device configured to operate according to multiple cellular communication protocols. The device may operate according to a first cellular communication protocol at a first time, which may include attaching to a first cell. The device may operate according to a second cellular communication protocol at a second time. Operations according to the first cellular communication protocol may be suspended while operating according to the second cellular communication protocol. The device may attempt to resume operating according to the first cellular communication protocol at a third time. This may include measuring one or more of signal strength or signal quality of the first cell. The wireless device may select a cell to which to attach at the third time based at least in part on the measured signal strength and signal quality of the first cell.

主权项

1. A method for cell re-selection, wherein the method is implemented by a wireless device implementing a plurality of cellular communication protocols, the method comprising:
operating according to a first cellular communication protocol at a first time, comprising attaching to a first cell that operates according to the first cellular communication protocol; operating according to a second cellular communication protocol at a second time, wherein operating according to the second cellular communication protocol at the second time is in accordance with a paging cycle of the second cellular communication protocol, wherein operating according to the second cellular communication protocol at the second time comprises attaching to a second cell that operates according to the second cellular communication protocol to monitor paging messages according to the second cellular communication protocol, wherein operations according to the first cellular communication protocol are suspended while operating according to the second cellular communication protocol, wherein the wireless device implements the first and second cellular communication protocols using a shared radio, wherein the first cellular communication protocol comprises a first protocol stack, wherein the second cellular communication protocol comprises a second protocol stack, wherein only one of the first and second protocol stacks controls the shared radio at a time; attempting to resume operating according to the first cellular communication protocol at a third time, wherein the third time occurs after finishing monitoring paging messages according to the second cellular communication protocol, comprising:
measuring a signal strength metric of the first cell;measuring a signal quality metric of the first cell; andselecting a cell to which to attach based at least in part on the measured signal strength and signal quality metrics of the first cell, wherein selecting a cell to which to attach comprises: determining if signal strength of the first cell is greater than a first signal strength threshold; determining if signal quality of the first cell is less than a first signal quality threshold; andperforming a first cell re-selection procedure in response determining that signal strength of the first cell is greater than the first signal strength threshold and signal quality of the first cell is less than the first signal quality threshold.