Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-08-30
2005-08-30
Ferguson, Keith T. (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S422100, C455S426100, C455S560000, C455S466000, C455S550100, C455S552100, C370S352000, C370S353000, C370S354000, C370S355000, C370S357000, C370S360000
Reexamination Certificate
active
06937862
ABSTRACT:
A method for maintaining association between switching units in a network includes the steps of determining that a call is to be routed via a base station, routing units, and a switching unit. The call is then routed via the base station, at least one routing unit, a routing link, and a switching unit. An association message is transmitted to the switching unit to inform it of an address of an additional switching unit. A mobile station within a coverage area of the base station is capable of communicating with the switching units, and elements of the system are configured to address the additional switching unit to determine whether the mobile station is communicating via an appropriate path.
REFERENCES:
patent: 6275706 (2001-08-01), Rune
patent: 2001/0048673 (2001-12-01), Verkama et al.
patent: 2003/0018806 (2003-01-01), Rueger et al.
patent: 2003/0109262 (2003-06-01), Scheurich
patent: 99/66740 (1999-12-01), None
patent: 00/18171 (2000-03-01), None
patent: 00/21319 (2000-04-01), None
patent: 00/36869 (2000-06-01), None
Back Juha
Hulkkonen Tony
Hurtta Tuija
Rajaniemi Jaakko
Sitch Paul
Ferguson Keith T.
Nokia Corporation
Squire Sanders & Dempsey LLP
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