System and method for mitigating congestion handling during HS cell change

摘要

According to some embodiments, a radio network controller (RNC) facilitates a communication session for a wireless device in soft handover with an active set of cells. The active set of cells includes a serving cell (which provides an HS-DSCH connection) and a plurality of non-serving cells. The RNC attempts to admit the HS-DSCH connection in a first non-serving cell that satisfies each of one or more HS-DSCH cell change requirements and provides the best signal strength to the wireless device. If a failure occurs, the RNC attempts to admit the HS-DSCH connection in a second non-serving cell that satisfies each of the HS-DSCH cell change requirements and provides the second best signal strength to the wireless device. If successful, the RNC facilitates moving the HS-DSCH connection from the serving cell to the second non-serving cell.

主权项

1. A radio network controller, comprising:
one or more processors; and a non-transitory computer-readable storage medium further including computer-readable instructions that, when executed by the one or more processors, are configured to:
facilitate a communication session for a wireless device in soft handover with a current active set of cells, the active set of cells comprising a serving cell and a plurality of non-serving cells, wherein the serving cell provides the wireless device with a high speed downlink shared channel (HS-DSCH) connection;receive a power and quality measurement report indicating signal strengths that the wireless device receives from the active set of cells;determine, based on the power and quality measurement report, that the wireless device receives a best signal strength from a first target cell, the first target cell selected from the plurality of non-serving cells within the current active set of cells;determine that the first target cell satisfies each of one or more HS-DSCH cell change requirements;select the first target cell to provide the HS-DSCH connection;determine that call admission fails for the first target cell;determine, based on the power and quality measurement report, that the wireless device receives a second-best signal strength from a second target cell, the second target cell selected from the plurality of non-serving cells within the current active set of cells;determine that the second target cell satisfies each of the one or more HS-DSCH cell change requirements;select, in response to determining that the call admission fails for the first target cell, the second target cell to provide the HS-DSCH connection; andfacilitate moving the HS-DSCH connection from the serving cell to the second target cell if the second target cell succeeds at the call admission.