Method and apparatus for generating a neighbor cell list
First Claim
1. A method for use in a controller in a radio network including a number of cells, in which network a user equipment communicates with at least one cell defining an active set, the user equipment (UE) having a velocity vector including position, speed, and direction, comprising:
- receiving information related to the velocity vector;
filtering a neighbor cell list associated with active set using the velocity vector related information to create a filtered neighbor cell list including filtering out fewer cells from the neighbor cell list when the speed of the user equipment is higher than when the speed is lower; and
transmitting the filtered neighbor cell list to the user equipment thereby enabling measurement of pilot signal strength for cells in the filtered neighbor cell list,wherein when the network includes different hierarchical level cells, the filtering depends on the speed of the user equipment, the method further comprising;
filtering out from the neighbor cell list one or more larger cells when the speed is under a speed threshold, andfiltering out from the neighbor cell list one or more smaller cells when the speed is over the speed threshold, andwherein when the network includes cells using different radio access technologies, the filtering depends on which radio access technology is used in the different cells.
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Accused Products
Abstract
A user equipment (UE) communicates with at least one cell defining an active set. A velocity vector including position, speed, and direction is associated with the UE. A radio network controller receives information related to the velocity vector and creates a filtered neighbor cell list by filtering a neighbor cell list associated with the active set. The filtering depends on the velocity vector related information. The controller transmits the filtered neighbor cell list to the user equipment so that pilot signal strength is measured for cells in that list.
76 Citations
28 Claims
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1. A method for use in a controller in a radio network including a number of cells, in which network a user equipment communicates with at least one cell defining an active set, the user equipment (UE) having a velocity vector including position, speed, and direction, comprising:
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receiving information related to the velocity vector; filtering a neighbor cell list associated with active set using the velocity vector related information to create a filtered neighbor cell list including filtering out fewer cells from the neighbor cell list when the speed of the user equipment is higher than when the speed is lower; and transmitting the filtered neighbor cell list to the user equipment thereby enabling measurement of pilot signal strength for cells in the filtered neighbor cell list, wherein when the network includes different hierarchical level cells, the filtering depends on the speed of the user equipment, the method further comprising; filtering out from the neighbor cell list one or more larger cells when the speed is under a speed threshold, and filtering out from the neighbor cell list one or more smaller cells when the speed is over the speed threshold, and wherein when the network includes cells using different radio access technologies, the filtering depends on which radio access technology is used in the different cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use in a user equipment communicating with at least one cell defining an active set in a radio network, the user equipment having a velocity vector including position, speed, and direction, comprising:
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transmitting information related to the velocity vector; receiving a filtered neighbor cell list generated using the velocity vector related information and a neighbor cell list associated with the active set; and measuring pilot signal strength for the cells in the filtered neighbor cell list, wherein fewer cells are filtered out when the speed of the user equipment is higher than when the speed is lower, wherein when the network includes different hierarchical level cells, the filtering depends on the speed of the user equipment, the method further comprising; filtering out from the neighbor cell list one or more larger cells when the speed is under a speed threshold, and filtering out from the neighbor cell list one or more smaller cells when the speed is over the speed threshold, and wherein when the network includes cells using different radio access technologies, the filtering depends on which radio access technology is used in the different cells. - View Dependent Claims (12, 13, 14)
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15. A controller for use in a radio network including a number of cells in which network a user equipment communicates with at least one cell defining an active set, the user equipment having a velocity vector including position, speed, and direction, wherein the controller is configured as follows:
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to receive information related to the velocity vector; to filter a neighbor cell list associated with the active set depending on the velocity vector information to create a filtered neighbor cell list; and to transmit the filtered neighbor cell list to the user equipment thereby enabling measurement by the user equipment of pilot signal strength for cells in the filtered neighbor cell list, wherein the controller is arranged to select a number of cells to be filtered out from the neighbor cell list depending on the speed of the user equipment so that fewer cells are filtered out from the neighbor cell list when the speed is higher than when the speed is lower, wherein when the network includes cells on different hierarchical levels, the controller is arranged to filter out from the neighbor cell list one or more larger cells when the user equipment speed is under a speed threshold, and to filter out from the neighbor cell list one or more of smaller cells when the user equipment speed is over the speed threshold, and wherein when the network includes cells using different radio access technologies, the controller is arranged to filter the neighbor cell list depending on which radio access technology is used in the different cells. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A user equipment for in use communicating with at least one cell defining an active set in a radio network and having a velocity vector including position, speed, and direction, wherein the user equipment is arranged to perform the following:
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transmit information related to the velocity vector; receive a filtered neighbor cell list created by filtering a neighbor cell list associated with the active set depending on the velocity vector related information; and measure a pilot signal strength for one or more cells in the filtered neighbor cell list, wherein fewer cells are filtered out when the speed of the user equipment is higher than when the speed is lower, wherein when the network includes different hierarchical level cells, the filtering depends on the speed of the user equipment, the neighbor cell list one or more larger cells have been removed from the list when the speed is under a speed threshold, and the neighbor cell list one or more smaller cells have been removed from the list when the speed is over the speed threshold, and wherein when the network includes cells using different radio access technologies, the filtering depends on which radio access technology is used in the different cells. - View Dependent Claims (26, 27, 28)
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Specification