Back to results
US 8,805,372 B2Granted
Systems and methods for reselecting cells in a cellular wireless communication system
AssigneeQUALCOMM Incorporated
InventorsJonathan Richard Cook, Mohit Narang
Life of this patent
Estimating the term…
Abstract
Systems and methods include reselecting and handing over a mobile communication device from a first cell to a second cell in a cellular wireless communication system based on determining whether the signal quality level of the second cell meets or exceeds a signal quality threshold.
Claims29
A method comprising:
- receiving a neighbor list at a mobile station from a base station of a first cell, wherein the first cell is included in a wireless communication system;
- receiving a signal at the mobile station from a base station of at least one neighbor cell, wherein the base station of the at least one neighbor cell is identified in the neighbor list;
- determining, at the mobile station, a signal quality level of the signal, wherein the signal quality level comprises at least one of a signal to noise ratio, a signal to interference ratio, or a signal to interference plus noise ratio;
- determining whether the signal quality level of the signal satisfies a signal quality threshold;
- adding an identifier of the at least one neighbor cell to a potential handover candidate list of neighbor cells in response to the signal quality level of the signal satisfying the signal quality threshold, wherein each of the neighbor cells identified in the potential handover candidate list has a corresponding signal quality level, and wherein the signal quality threshold is set at a decibel (dB) level corresponding to a target handover success rate based on historical data, wherein the historical data comprises data compiled and averaged from handovers that occurred over a period of time;
- and
- ranking, at the mobile station, the neighbor cells identified in the potential handover candidate list based on the respective corresponding signal quality levels to produce an ordered list, wherein the identifier of the at least one neighbor cell is added at a position within the ordered list based on the corresponding signal quality level.
4 more elements
A computer program product comprising:
- a non-transitory computer-readable medium of a mobile station, the non-transitory computer-readable medium comprising instructions that cause a computer to:
- receive a neighbor list from a base station of a first cell, wherein the first cell is included in a wireless communication system;
- receive a signal from a base station of at least one neighbor cell, wherein the at least one neighbor cell is identified in the neighbor list;
- determine a signal quality level of the signal, wherein the signal quality level comprises at least one of a signal to noise ratio, a signal to interference ratio, or a signal to interference plus noise ratio;
- determine whether the signal quality level of the signal satisfies a signal quality threshold;
- add an identifier of the at least one neighbor cell to a potential handover candidate list of neighbor cells in response to the signal quality level satisfying the signal quality threshold, wherein each of the neighbor cells identified in the potential handover candidate list has a corresponding signal quality level, and wherein the signal quality threshold is set at a decibel (dB) level corresponding to a target handover success rate based on historical data, wherein the historical data comprises data compiled and averaged from handovers that occurred over a period of time;
- and
- rank the neighbor cells identified in the potential handover candidate list based on the respective corresponding signal quality levels to produce an ordered list, wherein the identifier of the at least one neighbor cell is added to a position within the ordered list based on the corresponding signal quality level.
5 more elements
An apparatus comprising:
- means for receiving a neighbor list at a mobile station from a base station of a first cell, wherein the first cell is included in a wireless communication system;
- means for receiving a signal at the mobile station from a base station of at least one neighbor cell, wherein the at least one neighbor cell is identified in the neighbor list;
- means for determining a signal quality level of the signal, wherein the signal quality level comprises at least one of a signal to noise ratio, a signal to interference ratio, or a signal to interference plus noise ratio;
- means for determining whether the signal quality level of the signal satisfies a signal quality threshold;
- means for adding an identifier of the at least one neighbor cell to a potential handover candidate list of neighbor cells in response to the signal quality level satisfying the signal quality threshold, wherein each of the neighbor cells identified in the potential handover candidate list has a corresponding signal quality level, and wherein the signal quality threshold is set at a decibel (dB) level corresponding to a target handover success rate based on historical data, wherein the historical data comprises data compiled and averaged from handovers that occurred over a period of time;
- and
- means for ranking the neighbor cells identified in the potential handover candidate list based on the respective corresponding signal quality levels to produce an ordered list, wherein the identifier of the at least one neighbor cell is added at a position within the ordered list based on the corresponding signal quality level.
4 more elements
An apparatus comprising:
- a receiver operable to receive a neighbor list from a base station of a first cell, wherein the first cell is included in a wireless communication system;
- and
- a handover manager component operable to:
- receive a signal from a base station of at least one neighbor cell, wherein the at least one neighbor cell is identified in the neighbor list;
- determine a signal quality level of the signal, wherein the signal quality level comprises at least one of a signal to noise ratio, a signal to interference ratio, or a signal to interference plus noise ratio;
- determine whether the signal quality level of the signal satisfies a signal quality threshold;
- and
- add an identifier of the at least one neighbor cell to a potential handover candidate list of neighbor cells in response to the signal quality level satisfying the signal quality threshold, wherein each of the neighbor cells identified in the potential handover candidate list has a corresponding signal quality level, wherein the signal quality threshold is set at a decibel (dB) level corresponding to a target handover success rate based on historical data, wherein the historical data comprises data compiled and averaged from handovers that occurred over a period of time;
- and
- rank the neighbor cells identified in the potential handover candidate list based on the respective corresponding signal quality levels to produce an ordered list, wherein the identifier of the at least one neighbor cell is added at a position within the ordered list based on the corresponding signal quality level.
7 more elements
A processor of a mobile station configured to execute instructions stored at a non-transitory computer readable medium, the instructions causing the processor to:
- receive a neighbor list from a base station of a first cell, wherein the first cell is included in a wireless communication system;
- receive a signal from a base station of at least one neighbor cell, wherein the base station of the at least one neighbor cell is identified in the neighbor list;
- determine a signal quality level of the signal, wherein the signal quality level comprises at least one of a signal to noise ratio, a signal to interference ratio, or a signal to interference plus noise ratio;
- determine whether the signal quality level of the signal satisfies a signal quality threshold;
- and
- add an identifier of the at least one neighbor cell to a potential handover candidate list of neighbor cells in response to the signal quality level of the signal satisfying the signal quality threshold, wherein each of the neighbor cells identified in the potential handover candidate list has a corresponding signal quality level, wherein the signal quality threshold is set at a decibel (dB) level corresponding to a target handover success rate based on historical data, wherein the historical data comprises data compiled and averaged from handovers that occurred over a period of time;
- and
- rank the neighbor cells identified in the potential handover candidate list based on the respective corresponding signal quality levels to produce an ordered list, wherein the identifier of the at least one neighbor cell is added at a position within the ordered list based on the corresponding signal quality level.
5 more elements
Dependencies are inferred from the claim text.