Apparatus and method for determining soft or softer handoff in mobile communication system
First Claim
1. A method of cell switching in a mobile communication system comprising a plurality of sectors, each sector corresponding to a base station, comprising the steps of:
- determining an active set comprising at least one sector being a serving sector;
receiving a control parameter for each sector in the active set, the control parameter being associated with using at least one of first-type and second-type handoff when transitioning from the serving sector to a target sector;
determining identifier parameters corresponding to the sectors in the active set, each identifier parameter being determined by associating control parameters of at least two sectors in the active set;
determining at least one of the first-type and the second-type handoff by comparing at least two identifier parameters corresponding to the sectors in the active set; and
selecting cell switching parameters corresponding to at least one of the first-type and the second-type handoff.
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Accused Products
Abstract
Apparatus and method for determining soft or softer handoff are described. The present invention includes the steps of comparing sectors in an active set to set values corresponding to the soft or softer handoff for the sectors, respectively in a base station, transmitting a first parameter for selecting cell switching parameters between the sectors neighboring each other in the active set to a mobile station wherein the set values for the respective sectors are included in the first parameter, generating values of a parameter PDCH_GROUP_IDENTIFIER corresponding to a packet data channel group identifier using the set values included in the first parameter, determining whether a serving sector and a target sector among the sectors are in the soft or softer handoff using the generated values of the parameter PDCH_GROUP_IDENTIFIER, and selecting the cell switching parameters accordingly.
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Citations
27 Claims
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1. A method of cell switching in a mobile communication system comprising a plurality of sectors, each sector corresponding to a base station, comprising the steps of:
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determining an active set comprising at least one sector being a serving sector;
receiving a control parameter for each sector in the active set, the control parameter being associated with using at least one of first-type and second-type handoff when transitioning from the serving sector to a target sector;
determining identifier parameters corresponding to the sectors in the active set, each identifier parameter being determined by associating control parameters of at least two sectors in the active set;
determining at least one of the first-type and the second-type handoff by comparing at least two identifier parameters corresponding to the sectors in the active set; and
selecting cell switching parameters corresponding to at least one of the first-type and the second-type handoff. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A mobile station for use in a mobile communication system comprising a plurality of sectors, each sector corresponding to a base station, the mobile station comprising:
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an antenna;
a processor for controlling the mobile station;
a display in communication with the processor to display user interface information;
a keyboard in communication with the processor to input user controlled data;
the processor comprising means for receiving a control parameter for each sector in the active set, the control parameter being associated with using at least one of first-type and second-type handoff when transitioning from the serving sector to a target sector;
means for determining identifier parameters corresponding to the sectors in the active set, each identifier parameter being determined by associating control parameters of at least two sectors in the active set;
means for determining at least one of the first-type and the second-type handoff by comparing at least two identifier parameters corresponding to the sectors in the active set; and
means for selecting cell switching parameters corresponding to at least one of the first-type and the second-type handoff. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of cell switching using an active set of sectors in a mobile communication system comprising a plurality of sectors, each sector corresponding to a fixed station, comprising the steps of:
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receiving a control parameter for each sector in the active set, the control parameter being associated with using at least one of first-type and second-type handoff when transitioning from a serving sector to a target sector;
determining identifier parameters corresponding to the sectors in the active set, each identifier parameter being determined by associating control parameters of at least two sectors in the active set;
determining at least one of the first and the second handoff by comparing at least two identifier parameters corresponding to the sectors in the active set; and
selecting cell switching parameters corresponding to at least one of the first and the second handoff. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of cell switching in a mobile communication system comprising a plurality of sectors, each sector corresponding to a base station, comprising the steps of:
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setting an identifier parameter associated with a first sector in the active set to ‘
000’
;
if a control parameter is set to ‘
1’
then setting a next identifier parameter to the same value as that of a previous identifier parameter in a list of active set; and
if a control parameter is not set to ‘
1’
then the next identifier parameter is set to a value one greater than that of the previous identifier parameter.
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27. A method of cell switching in a mobile communication system comprising a plurality of sectors, each sector corresponding to a base station, comprising the steps of:
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setting an identifier parameter associated with a first sector in the active set to ‘
000’
;
setting a next identifier parameter to the identifier parameter of previous sector in the active set that supports the packet data communication, if corresponding control parameter is set to a first level (‘
1’
) and there are no other sectors between a present sector corresponding to the next identifier parameter and a previous sector that support the packet data communication;
setting the identifier parameter to the identifier parameter of previous sector in the active set that supports the packet data communication, if corresponding control parameter is set to a first level (“
1”
) and all sectors between the present sector corresponding to the next identifier parameter and a previous sector in the active set that support packet data communication have corresponding control parameter set to the first level; and
otherwise set the identifier parameter to a value different (one greater) than the identifier parameter corresponding to previous sector that supports the data packet communication in the active set.
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Specification