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Patent EP1555847A2 successfully refreshed from Google Patents.
EP1555847A2
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Apparatus and method for identifying a neighboring cell boundary in a mobile communication system
Assignee: Samsung Electronics Co Ltd
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Filing: 2005-01-14
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Granted: —
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Expires: 2025-01-14
Abstract
Abstract A mobile terminal (250) identifies a cell boundary (230) of a mobile communication network supporting an asynchronous scheme for handover between different communication systems (210,220). For this, a boundary indication base station (240) newly defines boundary indication codewords distinguished from existing codewords used for acquisition of frame synchronization, and transmits one of the boundary indication codewords over a secondary synchronization channel every frame. Upon receiving the boundary indication codeword over the secondary synchronization channel, the mobile terminal recognizes that it is located in a boundary of the mobile communication network supporting the asynchronous scheme, and performs handover to a mobile communication network supporting a synchronization scheme.
Inventors
- 👤 Ki-Ho Cho
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:32
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0083; H04W36/00837; H04W36/14; H04W36/144; H04W36/1443; H04W56/00; H04W56/001; H04W88/00; H04W88/02; H04W88/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
145 words
A method for identifying a boundary of a mobile communication
network supporting an asynchronous scheme by a boundary indication codeword
by a mobile terminal in a mobile communication system supporting the
asynchronous scheme, which designates codewords used for acquisition of frame
synchronization and boundary indication codewords distinguished from the
codewords, and transmits one of the codewords and the boundary indication
codewords over a secondary synchronization channel, the method comprising the
steps of: receiving a primary synchronization channel, acquiring slot
synchronization from the primary synchronization channel, and then receiving the
secondary synchronization channel; determining whether any one of the boundary indication codewords is
received over the secondary synchronization channel; and performing handover to a mobile communication network supporting a
different communication scheme or a different frequency from the asynchronous
scheme, if it is determined that a boundary indication codeword is received over
the secondary synchronization channel.
Claim 2
Dependent Claim
43 words
The method of claim 1, wherein 64 codewords are used for the
acquisition of frame synchronization, and the codewords and the boundary
indication codewords are not identical to each other even though they undergo
any one of from 1-cyclic shift to 15-cyclic shifts.
Claim 3
Dependent Claim
131 words
The method of claim 2, wherein the boundary indication
codewords are defined in the following table. Codeword No. Codeword 65 9, 13, 1, 3, 11, 5 10, 14, 12, 8, 4, 15, 2, 1, 6 66 10, 13, 4, 8, 14, 7, 1, 11, 9, 12, 6, 15, 3, 2, 7 67 10, 14, 3, 7, 13, 11, 2, 8, 4, 9, 6, 12, 5, 1, 10 68 10, 15, 4, 7, 14, 13, 2, 8, 3, 9, 6, 11, 1, 4, 5 69 11, 14, 3, 6, 12, 4, 9, 13, 10, 7, 1, 8, 5, 2, 9 70 13, 15, 5, 7, 14, 12, 1, 11, 6, 10, 3, 9, 2, 4, 6 71 14, 15, 6, 12, 3, 11, 2, 5, 7, 13, 9, 1, 8, 4, 12
Claim 4
Dependent Claim
30 words
The method of claim 1, further comprising the step of acquiring,
frame synchronization by the received codeword if any one of the codewords is
received over the secondary synchronization channel.
Claim 5
Dependent Claim
28 words
The method of claim 1, further comprising the step of performing
handover to a mobile communication network supporting a synchronous scheme
if the boundary indication codeword is received.
Claim 6
Independent Claim
80 words
A method for indicating a boundary of a mobile communication
network supporting an asynchronous scheme by a boundary indication base
station in a mobile communication system supporting the asynchronous scheme,
the method comprising the steps of: transmitting, by a mobile terminal, a primary synchronization channel
required for acquisition of slot synchronization; and designating boundary indication codewords distinguished from
codewords used for acquisition of frame synchronization, and transmitting one of
the boundary indication codewords over a secondary synchronization channel
every frame.
Claim 7
Dependent Claim
43 words
The method of claim 6, wherein 64 codewords are used for the
acquisition of frame synchronization, and the codewords and the boundary
indication codewords are not identical to each other even though they undergo
any one of from 1-cyclic shift to 15-cyclic shifts.
Claim 8
Dependent Claim
131 words
The method of claim 7, wherein the boundary indication
codewords are defined in the following table. Codeword No. Codeword 65 9, 13, 1, 3, 11, 5 10, 14, 12, 8, 4, 15, 2, 1, 6 66 10, 13, 4, 8, 14, 7, 1, 11, 9, 12, 6, 15, 3, 2, 7 67 10, 14, 3, 7, 13, 11, 2, 8, 4, 9, 6, 12, 5, 1, 10 68 10, 15, 4, 7, 14, 13, 2, 8, 3, 9, 6, 11, 1, 4, 5 69 11, 14, 3, 6, 12, 4, 9, 13, 10, 7, 1, 8, 5, 2, 9 70 13, 15, 5, 7, 14, 12, 1, 11, 6, 10, 3, 9, 2, 4, 6 71 14, 15, 6, 12, 3, 11, 2, 5, 7, 13, 9, 1, 8, 4, 12
Claim 9
Independent Claim
147 words
A method for indicating a boundary of a mobile communication
network supporting an asynchronous scheme by a boundary indication base
station in a mobile communication system supporting the asynchronous scheme,
the method comprising the steps of: designating, by the boundary indication base station, a primary
synchronization channel for acquisition of slot synchronization and boundary
indication codewords distinguished from codewords used for acquisition of frame
synchronization, and transmitting a secondary synchronization channel to which
any one of the boundary indication codewords is mapped, at a predetermined
position of each of slots comprising a frame; and receiving, by a mobile terminal, a primary synchronization channel,
acquiring slot synchronization from the primary synchronization channel, and
performing handover to a mobile communication network supporting a different
communication scheme or a different frequency from the asynchronous scheme if
any one of the boundary indication codewords is received over the secondary
synchronization channel.
Claim 10
Dependent Claim
43 words
The method of claim 9, wherein 64 codewords are used for the
acquisition of frame synchronization, and the codewords and the boundary
indication codewords are not identical to each other even though they undergo
any one of from 1-cyclic shift to 15-cyclic shifts.
Claim 11
Dependent Claim
103 words
The method of claim 10, wherein the boundary indication
codewords are defined in the following table. Codeword No. Codeword 65 9, 13, 1, 3, 11, 5 10, 14, 12, 8, 4, 15, 2, 1, 6 66 10, 13, 4, 8, 14, 7, 1, 11, 9, 12, 6, 15, 3, 2, 7 67 10, 14, 3, 7, 13, 11, 2, 8, 4, 9, 6, 12, 5, 1, 10 68 10, 15, 4, 7, 14, 13, 2, 8, 3, 9, 6, 11, 1, 4, 5 69 11,14,3,6,12,4,9,13,10,7,1,8,5,2,9 70 13,15,5,7,14,12,1,11,6,10,3,9,2,4,6 71 14, 15, 6, 12, 3, 11, 2, 5, 7, 13, 9, 1, 8, 4, 12
Claim 12
Dependent Claim
34 words
The method of claim 9, further comprising the step of acquiring,
frame synchronization by the received codeword by the mobile terminal if any
one of the codewords is received over the secondary synchronization channel.
Claim 13
Dependent Claim
32 words
The method of claim 9, further comprising the step of performing
handover to a mobile communication network supporting a synchronous scheme
by the mobile terminal if the boundary indication codeword is received.
Claim 14
Independent Claim
144 words
An apparatus for indicating a boundary of a mobile
communication network supporting an asynchronous scheme by a boundary
indication base station in a mobile communication system supporting the
asynchronous scheme, the apparatus comprising: the boundary indication base station for designating a primary
synchronization channel for acquisition of slot synchronization and boundary
indication codewords distinguished from codewords used for acquisition of frame
synchronization, and transmitting a secondary synchronization channel to which
any one of the boundary indication codewords is mapped, at a predetermined
position of each of slots comprising a frame; and a mobile terminal for receiving a primary synchronization channel,
acquiring slot synchronization from the primary synchronization channel, and
performing handover to a mobile communication network supporting a different
communication scheme or a different frequency from the asynchronous scheme if
any one of the boundary indication codewords is received over the secondary
synchronization channel.
Claim 15
Dependent Claim
43 words
The apparatus of claim 14, wherein 64 codewords are used for
the acquisition of frame synchronization, and the codewords and the boundary
indication codewords are not identical to each other even though they undergo
any one of from 1-cyclic shift to 15-cyclic shifts.
Claim 16
Dependent Claim
117 words
The apparatus of claim 15, wherein the boundary indication
codewords are defined in the following table. Codeword No. Codeword 65 9, 13, 1, 3, 11, 5 10, 14, 12, 8, 4, 15, 2, 1, 6 66 10, 13, 4, 8, 14, 7, 1, 11, 9, 12, 6, 15, 3, 2, 7 67 10, 14, 3, 7, 13, 11, 2, 8, 4, 9, 6, 12, 5, 1, 10 68 10, 15, 4, 7, 14, 13, 2, 8, 3, 9, 6, 11, 1, 4, 5 69 11,14,3,6,12,4,9,13,10,7,1,8,5,2,9 70 13, 15, 5, 7, 14, 12, 1, 11, 6, 10, 3, 9, 2, 4, 6 71 14, 15, 6, 12, 3, 11, 2, 5, 7, 13, 9, 1, 8, 4, 12
Claim 17
Dependent Claim
29 words
The apparatus of claim 14, wherein if any one of the codewords
is received over the secondary synchronization channel, the mobile terminal
acquires frame synchronization by the received codeword.
Claim 18
Dependent Claim
27 words
The apparatus of claim 14, wherein the mobile terminal performs
handover to a mobile communication network supporting a synchronous scheme
if the boundary indication codeword is received.
References Cited (Backward Citations)
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