Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A method of controlling a frequency handoff in a wireless
communication system in which a mobile station communicates with one or more base
stations, the method comprising the steps of: generating a trigger metric as a function of an average transmit signal-to-noise
measure for a plurality of pilot signals and a sum of the signal-to-noise measures
for at least a subset of the plurality of pilot signals; and utilizing the trigger metric to control a handoff from a current frequency
to a new frequency in an ongoing call.
Claim 2
Dependent Claim
107 words
Apparatus for use in controlling frequency handoffs in a wireless
communication system in which a mobile station communicates with one or more base
stations, the apparatus comprising: a processor for generating a trigger metric as a function of an average
transmit signal-to-noise measure for a plurality of pilot signals and a sum of the signal-to-noise
measures for at least a subset of the plurality of pilot signals; and a memory for at least temporarily storing a representation of the trigger
metric, such that the trigger metric is used to control a handoff from a current
frequency to a new frequency in an ongoing call in the system.
Claim 3
Dependent Claim
49 words
A method as claimed in claim 1 or apparatus as claimed in claim 2
wherein the trigger metric is generated as the difference between an average transmit
signal-to-noise measure for the plurality of pilot signals and a linear sum of pilot signal-to-noise
measures for the plurality of pilot signals.
Claim 4
Dependent Claim
33 words
A method as claimed in claim 1 or apparatus as claimed in claim 2
wherein the signal-to-noise measures are generated in the mobile station and included in
messages transmitted from the mobile station.
Claim 5
Dependent Claim
43 words
A method or apparatus as claimed in claim 4 wherein the system is an
IS-95 CDMA system and the messages transmitted from the mobile station include at
least one of a Power Measurement Report Message (PMRM) and a Pilot Strength
Measurement Message (PSMM).
Claim 6
Dependent Claim
31 words
A method as claimed in claim 1 or apparatus as claimed in claim 2
wherein the trigger metric is configured so as to distinguish same-frequency cell
boundaries from other-frequency cell boundaries.
Claim 7
Independent Claim
82 words
A method of controlling a frequency handoff in a wireless
communication system in which a mobile station communicates with one or more base
stations, the method comprising the steps of: generating measures of receive power and pilot signal-to-noise for both a
current frequency and a new frequency; and utilizing at least a subset of the measures to determine if an ongoing call
involving the mobile station should continue to operate at the current frequency or be
handed off to the new frequency.
Claim 8
Dependent Claim
124 words
Apparatus for controlling a frequency handoff in a wireless
communication system in which a mobile station communicates with one or more base
stations, the apparatus comprising: a processor which is operative (i) to obtain measures of receive power
and pilot signal-to-noise for both a current frequency and a new frequency, and (ii) to
utilizing at least a subset of the measures to determine if an ongoing call involving the
mobile station should continue to operate at the current frequency or be handed off to
the new frequency; and a memory for at least temporarily storing one or more thresholds for use
by the processor in determining if the ongoing call should continue at the current
frequency or be handed off to the new frequency.
Claim 9
Independent Claim
85 words
A method of controlling a frequency handoff in a wireless
communication system in which a mobile station communicates with one or more base
stations, the method comprising the steps of: generating a trigger metric as a function of a measure of receive power at
the mobile station; and utilizing the trigger metric to control a handoff from a current frequency
to a new frequency in an ongoing call, wherein the handoff is performed without
utilizing any signal-to-noise measures for pilot signals at the new frequency.
Claim 10
Independent Claim
102 words
An apparatus for use in controlling frequency handoffs in a wireless
communication system in which a mobile station communicates with one or more base
stations, the apparatus comprising: a processor for generating a trigger metric as a measure of receive power
at the mobile station; and a memory for at least temporarily storing a representation of the trigger
metric, such that the trigger metric is used to control a handoff from a current frequency
to a new frequency in an ongoing call in the system. wherein the handoff is performed
without utilizing any signal-to-noise measures for pilot signals at the new frequency.