Communications in an asynchronous cellular wireless network
AssigneeQUALCOMM Incorporated
InventorsJosef Blanz, Serge Willenegger
Life of this patent
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Abstract
Systems and techniques are disclosed for establishing a reference corresponding to the timing of a received signal from the first source, determining the timing for each received signal from a plurality of second sources, adjusting the reference to the timing of the received signal from one of the second sources, the timing of the received signal used to adjust the reference being closest in time to the unadjusted reference, and synchronizing a signal to the reference for transmission.
Claims20
A method of selecting a synchronizing source when a device in a wireless communication system passes from a first region to a second region, comprising:
- selecting a first reference node from said first region as said synchronizing source;
- entering into said second region having a plurality of nodes, wherein each of said plurality of nodes from said second region sends a signal having at least one downlink frame;
- and
- selecting a second reference node from said plurality of nodes from said second region as said synchronizing source by choosing one node in said second region wherein user device uplink transmission timing is closest in time to timing of the downlink frame received from the first reference node;
- wherein said first reference node and said second reference node are asynchronous sources.
An apparatus for of selecting a synchronizing source from a first region to a second region in a wireless communication system, comprising:
- means for selecting a first reference node from said first region as said synchronizing source;
- means for entering into said second region having a plurality of nodes, wherein each of said plurality of nodes from said second region sends a signal having a downlink frame;
- and
- means for selecting a second reference node from said plurality of nodes from said second region as said synchronizing source by choosing one node in said second region wherein user device uplink transmission timing is closest in time to timing of the downlink frame received from the first reference node;
- wherein said first reference node and said second reference node are asynchronous sources.
A mobile station for selecting a synchronizing source from a first region to a second region in a wireless communication system, comprising:
- circuitry configured to:
- select a first reference node from said first region as said synchronizing source;
- enter into said second region having a plurality of nodes, wherein each of said plurality of nodes from said second region sends a signal having at least one downlink frame;
- and
- select a second reference node from said plurality of nodes from said second region as said synchronizing source by choosing one node in said second region wherein user device uplink transmission timing is closest in time to timing of the downlink frame received from the first reference node;
- wherein said first reference node and said second reference node are asynchronous sources and the uplink transmission corresponds to the downlink frame.
An apparatus, comprising:
- a non-transitory computer-readable medium physically embodied with computer-readable program code that when executed causes a device to select a synchronizing source by:
- selecting a first reference node from a first region as said synchronizing source;
- entering into a second region having a plurality of nodes, wherein each of said plurality of nodes from said second region sends a signal having at least one downlink frame;
- and
- selecting a second reference node from said plurality of nodes from said second region as said synchronizing source by choosing one node in said second region wherein user device uplink transmission timing is closest in time to timing of the downlink frame received from the first reference node;
- wherein said first reference node and said second reference node are asynchronous sources.
Dependencies are inferred from the claim text.