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AssigneeNortel Networks Limited
InventorsWei Huang, Ning Guo
Estimating the term…
A mobile station is disclosed that functions within a 3G DS-CDMA communication system, in which a separate active set is defined for each of the different channel types. With the use of a separate Fundamental Channel Active Set, Forward Link-Supplemental Channel Active Set, Reverse Link-Supplemental Channel Active Set, and Dedicated Control Channel Active Set a flexible handoff of a multi-service active session is possible. Each type of channel is capable of handing off separately, thereby allowing channels with different requirements, such as resource requirements or signal strength requirements, to be handed off at different times, to different basestations, and/or in different methods (ie. soft or hard handoff). The handoffs are initiated by a basestation controller by updating, within the mobile station and the applicable basestations, the particular active set corresponding to the physical channel requiring a handoff.
A mobile station capable of having a plurality of groups of physical channels simultaneously and of performing handoff independently for at least two of said groups of physical channels, said mobile station arranged to maintain a respective active set identifying a set of basestations to be active for each group of the at least two of said groups of physical channels, wherein changes are made to the active sets of groups which have been determined to require handoff, and a handoff is performed for each group whose active set has been changed, by the handoff of communications from the basestations previously identified by the respective active set to the basestations identified by the respective active set after the changes have been made.
A basestation capable of having a plurality of groups of physical channels with a mobile station simultaneously and of performing handoff independently for at least two of the groups of physical channels, said basestation arranged to maintain a respective active set identifying a set of basestations to be active for each group of the at least two of the groups of physical channels, wherein changes are made to the active sets of groups which have been determined to require handoff, and a handoff is performed for each group whose active set has been changed, by a handoff of communications from the basestation when the basestation is no longer identified by the respective active set after the changes have been made, and by the handoff of communications to the basestation when the basestation is identified by the respective active set after the changes have been made.
Within a mobile communication system, a method of performing a handoff of a mobile station capable of having a plurality of groups of physical channels simultaneously, the method comprising:
Within a mobile communication system, a method of performing a handoff of a mobile station capable of having a plurality of groups of physical channels simultaneously, the method comprising:
A mobile station capable of having a plurality of groups of physical channels simultaneously and of performing handoff independently for at least two of said groups of physical channels, said mobile station arranged to maintain a respective identification identifying a set of basestations to be active for each group of the at least two of said groups of physical channels, wherein changes are made to the identification of groups which have been determined to require handoff, and a handoff is performed for each group whose identification has been changed, by the handoff of communications from the basestations previously identified by the respective identification to the basestations identified by the respective identification after the changes have been made.
Dependencies are inferred from the claim text.