Data sharing among radio access technologies
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsTomas Ekstedt, Johan Hokfelt, Jacob Lindquist, Jan Wichert
Life of this patent
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Abstract
By adapting its search procedures, a user equipment in a mobile communication system can shorten the time needed to find a cell or public land mobile network. If a first cell in a first radio access technology has been found, the equipment can exclude one or more frequencies from a search for cells in a second radio access technology. Thus, time and power are not wasted searching for cells in the second radio access technology that cannot be found.
Claims20
An adaptive method of searching for a cell in a communication system, comprising the steps of:
- searching for at least one cell in a first radio access technology, the cell being one of a plurality of cells having respective predetermined frequency channels in a band in the first radio access technology;
- and
- if at least one cell is found by the searching step, adapting a search for a cell in a second radio access technology based on frequency information relevant to the found cell in the first radio access technology;
- wherein the first radio access technology is different from the second radio access technology, and adapting the search for a cell in the second radio access technology comprises excluding, irrespective of respective priorities of cells in the first and second radio access technologies, at least one predetermined frequency channel of the second radio access technology that overlaps the frequency channel of the found at least one cell in the first radio access technology and including a predetermined frequency channel of at least one other cell in the band in the first radio access technology.
A user equipment (UE) for a communication system, comprising:
- a transceiver configured for communication via a selected one of at least two radio access technologies (RATs);
- and
- a processor, in communication with the transceiver, configured to search for at least one cell of the communication system using a first RAT, the cell being one of a plurality of cells having respective predetermined frequency channels in a band in the first radio access technology, and if at least one cell is found, to adapt a search for a cell in a second RAT based on frequency information relevant to the found cell in the first RAT;
- wherein the first RAT is different from the second RAT, and the processor is configured to adapt the search for a cell in the second RAT by excluding, irrespective of respective priorities of cells in the first and second RATs, at least one predetermined frequency channel of the second RAT that overlaps the frequency channel of the found at least one cell in the first RAT and including a predetermined frequency channel of at least one other cell in the band in the first radio access technology.
A non-transitory computer-readable medium having stored instructions that, when executed by a processor, cause the processor to perform an adaptive method of searching for a cell in a communication system, the method comprising the steps of:
- searching for at least one cell in a first radio access technology, the cell being one of a plurality of cells having respective predetermined frequency channels in a band in the first radio access technology;
- and
- if at least one cell is found by the searching step, adapting a search for a cell in a second radio access technology based on frequency information relevant to the found cell in the first radio access technology;
- wherein the first radio access technology is different from the second radio access technology, and adapting the search for a cell in the second radio access technology comprises excluding, irrespective of respective priorities of cells in the first and second radio access technologies, at least one predetermined frequency channel of the second radio access technology that overlaps the frequency channel of the found at least one cell in the first radio access technology and including a predetermined frequency channel of at least one other cell in the band in the first radio access technology.
Dependencies are inferred from the claim text.