EP0886453A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for indentifying base stations of a time division cellular network in a mobile station and mobile station
Assignee: Nokia Oyj
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Filing: 1998-06-17
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Granted: —
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Expires: 2018-06-17
Abstract
Abstract The invention relates to a method for identifying base stations of a time division cellular network in a mobile station. An advantage of the invention is the reduction in time needed for the identification of new base stations. In accordance with the invention frame timing difference data for the neighbour base stations (301) and/or the broadcast control channel time slot data for the neighbour base stations are transmitted from the serving base station to the mobile station; reception times for the neighbour base stations' system data are determined in the mobile station on the basis of said frame timing differences and/or the broadcast control channel time slot data (302) and system data are read and neighbour base stations are identified (303). The invention is also directed to a mobile station applying the method. <IMAGE>
Inventors
- 👤 Harri Jokinen
- 👤 Pekka Ranta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 16:10
CPC Classifications
H; H04; H04W; H04W48/00; H04W48/08; H04W48/12; H04W48/16; H04W48/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A method for identifying base stations of a time division cellular network
in a mobile station, characterised in that frame timing difference data for neighbour base stations are transmitted
from the serving base station to the mobile station (301; 501) and reception times for the neighbour base stations' system data are determined
in the mobile station on the basis of said frame timing differences (302; 502)
and system data are read and neighbour base stations are identified (303; 503).
Claim 2
Dependent Claim
28 words
The method of claim 1, characterised in that the serving base station
maintains a list of frame timing differences with base stations on a neighbour
list (201, 202).
Claim 3
Dependent Claim
29 words
The method of claim 1 or 2, characterised in that the frame timing
difference data are transmitted to the mobile station on the slow associated
control channel SACCH (301).
Claim 4
Dependent Claim
32 words
The method of claim 1 or 2, characterised in that the frame timing
difference data are transmitted to the mobile station on the broadcast control
channel BCCH or common control channel CCCH.
Claim 5
Dependent Claim
56 words
The method of claim 1, 2, 3 or 4, characterised in that a time window is
determined in the mobile station on the basis of the frame timing difference
for the appearance of an identification code in the system data of a new base
station and said identification code is read in said time window (302).
Claim 6
Independent Claim
53 words
The method of any one of the preceding claims, characterised in that in
a mobile station in idle state the frame timing difference data are read from
the broadcast control channel BCCH or common control channel CCCH and
used for determining the read times for the system data of the neighbour base
stations.
Claim 7
Independent Claim
82 words
A method for identifying base stations of a time division cellular network
in a mobile station, characterised in that broadcast control channel time slot data of the neighbour base stations are
transmitted from the serving base station to the mobile station (601) and reception times for the neighbour base stations' system data are determined
in the mobile station on the basis of said broadcast control channel time slot
data (602) and system data are read and neighbour base stations are identified (603).
Claim 8
Dependent Claim
28 words
The method of claim 7, characterised in that data for the neighbour
base stations' frame timing differences are transmitted from the serving base
station to the mobile station.
Claim 9
Dependent Claim
23 words
The method of claim 7, characterised in that the reading of system data
and identification of neighbour base stations include field strength
measurements.
Claim 10
Dependent Claim
74 words
A mobile station (600) comprising a control unit (602) that includes
means for identifying base stations of a time division cellular network, characterised in that said means comprises means for identifying, reading and storing a frame timing difference list for
the neighbour base stations coming from a base station (603); and means for determining reception times for the system data of a neighbour
base station on the basis of the frame timing differences (604).
Claim 11
Dependent Claim
78 words
A mobile station (900) comprising a control unit (902) that includes
means for identifying base stations of a time division cellular network, characterised in that said means comprises means for identifying, reading and storing broadcast control channel time
slot data for the neighbour base stations coming from a base station (903);
and means for determining reception times for the system data of a neighbour
base station on the basis of said broadcast control channel time slot data
(904).
Claim 12
Dependent Claim
68 words
The mobile station (900) of claim 11, characterised in that the means
further comprises means for identifying, reading and storing a frame timing difference list for
the neighbour base stations coming from a base station (905); and means for determining reception times for the system data of a neighbour
base station on the basis of the frame timing differences and the broadcast
control channel time slot data (904).
Claim 13
Dependent Claim
42 words
A base station (BTS), for a mobile communications network,
comprising: means to calculate frame timing difference data for neighbour base stations;
and means for transmitting said frame timing difference data when a mobile
station enters the service area of the base station.
Claim 14
Dependent Claim
47 words
A base station (BTS), for a mobile communications network,
comprising: means to calculate the broadcast control channel time slot data of neighbour
base stations; and means to transmit said broadcast control channel time slot data when a
mobile station enters the service area of the base station.
References Cited (Backward Citations)
No citation records indexed.
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