EP0836338A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
DECT/GSM external handover
Assignee: Nokia Oyj
•
Filing: 1997-10-10
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Granted: —
•
Expires: 2017-10-10
Abstract
Abstract A method for controlling handover of a DECT portable part from a first DECT fixed part to a second DECT fixed part during provision of a data service, both fixed parts communicating with a GSM mobile switch centre, the method comprising the first fixed part detecting that the handover has been requested, and in response modifying its control of the link between itself and the mobile switch centre to inhibit acknowledgement to the mobile switch centre of data not received by the portable part from the first fixed part.
Inventors
- 👤 Tuomo Sipila
- 👤 Markus Tapani Hakaste
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:29
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0066; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/18; H04L1/1867; H04L1/1887; H04L2001/0092; H04L2001/0097
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
89 words
A method for controlling handover of a DECT portable part from a first DECT fixed
part to a second DECT fixed part during provision of a data service, both fixed parts
communicating with a GSM mobile switch centre, the method comprising the first
fixed part detecting that the handover has been requested, and in response
modifying its control of the link between itself and the mobile switch centre to inhibit
acknowledgement to the mobile switch centre of data not received by the portable
part from the first fixed part.
Claim 2
Dependent Claim
34 words
A method as claimed in claim 1, wherein upon handover of the portable part to
the second fixed part the second fixed part applies a reset to the link with the mobile
switch centre.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 1 or 2, wherein in response to detecting that the
handover has been requested the first fixed part exercises flow control over the link
between itself and the mobile switch centre.
Claim 4
Dependent Claim
34 words
A method as claimed in claim 3, wherein upon handover of the portable part to
the second fixed part the second fixed part releases flow control on the link with the
mobile switch centre.
Claim 5
Independent Claim
17 words
A method as claimed in any preceding claim, wherein the said data comprises at
least one frame.
Claim 6
Independent Claim
89 words
A method for controlling handover of a DECT portable part from a first DECT fixed
part to a second DECT fixed part during provision of a data service, both fixed parts
communicating with a GSM mobile switch centre, the method comprising the first
fixed part relaying protocol messages between its link with the portable part and its
link with the mobile switch centre according to a predetermined mapping, to inhibit
acknowledgement to the mobile switch centre of data not received by the portable
part from the first fixed part.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 6, wherein the mapping is a one-to-one mapping
between protocol messages of the two said links.
Claim 8
Dependent Claim
31 words
A method as claimed in claim 6 or 7, wherein the said protocol messages of the
link between the first fixed part and the portable part are DECT LAPU protocol
messages.
Claim 9
Independent Claim
34 words
A method as claimed in any of claims 6 to 8, wherein the said protocol messages
of the link between the first fixed part and the mobile switch centre are GSM LAP
protocol messages.
Claim 10
Dependent Claim
61 words
A communications system comprising: a GSM mobile switch centre; a DECT fixed part in communication with the mobile switch centre; and a DECT portable part in communication with the fixed part; wherein in at least the provision of data service communications to the portable part
a protocol is applied all the way between the mobile switch centre and the portable
part.
Claim 11
Dependent Claim
17 words
A communications system as claimed in claim 10, wherein the said protocol is
the GSM LAP protocol.
Claim 12
Dependent Claim
26 words
A communications system as claimed in claim 10 or 11, wherein the portable
part includes means for encoding and decoding signals according to the said
protocol.
Claim 13
Dependent Claim
47 words
A communications system as claimed in any of claims 10 to 12, wherein the said
protocol provides for the division of data into frames and each of those frames is
communicated between the portable part and the fixed part in a single DECT data
link control frame.
Claim 14
Dependent Claim
17 words
A communications system as claimed in claim 10, wherein the said protocol is
the DECT LAPU protocol.
Claim 15
Dependent Claim
25 words
A communications system as claimed in claim 14, wherein the mobile switch
centre includes means for encoding and decoding signals according to the said
protocol.
References Cited (Backward Citations)
No citation records indexed.
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