Fast handover method for cross sector scenario in mobile communication systems
AssigneeIntel Deutschland GmbH
InventorsTianyan Pu, Thomas Fliess, Matthias Hofmann
Life of this patent
Estimating the term…
Abstract
A method for handover in a mobile communication system, wherein cell search is performed by determining cell identities based on cell identity information transmitted within downlink data is provided. The cell power of cells detected by cell search is measured. Moreover, the cell power of an additional cell is measured, the additional cell having a cell identity that is related to a cell identity of a cell detected by cell search in that the additional cell and the cell detected by cell search are adjacent cells. The method is applicable in cross-sector scenarios avoiding call drops due to lengthy cell detection.
Claims11
A method performed by a mobile device for faster cross-sector handover in a mobile communication system, comprising:
- searching for and detecting a plurality of cells using a cell searcher of a mobile device by determining an identity of the cells based on cell identity information conveyed by one or more periodic synchronization signals to provide a cell list of detected cells, the one or more periodic synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) transmitted periodically within an LTE radio frame;
- providing the cell list to a cell list administrator of the mobile device;
- augmenting the cell list with a cell ID of an additional cell not detected by the cell searcher using the cell list administrator, the additional cell having a same group ID and being associated with a same base station of at least sonic of the cells on the cell list;
- measuring a power level of cell-specific reference signals (CRS) of at least some of the cells of the cell list that have been detected, the power level measurement using a cell measurement engine of the mobile device;
- performing a blind measurement of a power level of a CRS of the additional cell that had not been detected, the CRS including a cell ID of an associated cell, the power level measurement using the cell measurement engine;
- and
- initiating a cross-sector handover to the additional cell that had not been detected based on the power level measurement of the associated cell-specific reference signal the cross-sector handover being a handover to a cell served by the same base station.
A mobile device, comprising:
- a cell searcher configured to detect a plurality of cells in a cellular communication system to determine an identity of the cells based on cell identity information conveyed by one or more periodic synchronization signals to provide a cell list of detected cells, the one or more periodic synchronization signals include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) transmitted periodically within an LTE radio frame;
- a cell list administrator configured to administer the cell list and to augment the cell list with a cell ID of an additional cell not detected by the cell searcher, the additional cell having a same group ID and being associated with a same base station of at least some of the cells on the cell list;
- and
- a cell measurement engine configured to measure a power level of cell-specific reference signals (CRS) of at least some of the cells of the cell list that have been detected, and perform a blind measurement of a power level of a CRS of the additional cell that had not been detected, the CRS including a cell ID of an associated cell;
- and
- processing circuitry to initiate a cross-sector handover to the additional cell that had not been detected based on the power level measurement of the associated cell-specific reference signal the cross-sector handover being a handover to a cell served by the same base station.
Dependencies are inferred from the claim text.