Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2006-01-17
2006-01-17
Ramos-Feliciano, Eliseo (Department: 2687)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456100, C455S502000
Reexamination Certificate
active
06987979
ABSTRACT:
Determining the position of a mobile terminal operating in a packet-switched communications system based on timing advance values obtained through network initiated artificial cell hops. The mobile terminal may be instructed to perform a series of artificial cell changes so that timing advance values may be obtained for the mobile terminal with respect to a plurality of base stations. The position of the mobile terminal is then determined based on the timing advance values, optionally supplemented by signal strength measurements. The mobile terminal may contact a network entity via the base station in each cell before being instructed to change to the next base station. Or, the mobile terminal may be supplied with a list of base stations to contact, with the mobile terminal transmitting short access bursts to the base station in a given cell before automatically tuning to the next cell, without waiting for an acknowledgement.
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Ramos-Feliciano Eliseo
Telefonaktiebolaget LM Ericsson (publ)
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