H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
H04Q 7/38 (2006.01)
Patent
CA 2264433
Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to- noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to- noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone. Other aspects of the invention reduce unnecessary searching for a new frequency and decrease the likelihood of "ping- ponging" from a current frequency to a new frequency by providing additional checks in the handoff process. For example, receive power and pilot signal-to-noise measures may be generated at a mobile station for both current and new frequencies. The mobile station then continues to operate at the current frequency as long as certain predetermined threshold conditions based on the measures are satisfied.
Bernstein Neil E.
Kuo Wen-Yi
Meyers Martin Howard
Wang Xiao
Weaver Carl Francis
Kirby Eades Gale Baker
Lucent Technologies Inc.
LandOfFree
Methods and apparatus for inter-frequency handoff in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for inter-frequency handoff in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for inter-frequency handoff in a... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1751968