Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-09-28
2001-01-16
Trost, William G. (Department: 2744)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S426100, C455S465000, C370S468000, C370S904000
Reexamination Certificate
active
06175738
ABSTRACT:
BACKGROUND OF THE INVENTION
In communication systems comprising an information transmission link between an information source and an information sink, transmitting and receiving devices are used for information processing and transmission, in which devices
1) the information processing and information transmission can take place in a preferred direction of transmission (simplex mode) or in both directions of transmission (duplex mode),
2) the information processing is analog or digital,
3) the information transmission over the long-distance transmission link is wire-connected or takes place wirelessly on the basis of various FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and/or CDMA (Code Division Multiple Access) information transmission methods—e.g. according to radio standards such as DECT, GSM, WACS or PACS, IS-54, PHS, PDC etc. [Compare IEEE Communications Magazine, January 1995, pages 50 to 57; D. D. Falconer et al.: “Time Division Multiple Access Methods for Wireless Personal Communications”].
“Information” is a generic term which stands both for the intelligence (information) and for the physical representation (signal). Even if an information contains the same intelligence—i.e. has the same information content—different signal forms can occur. Thus, for example, an information relating to an object, can be transmitted
(1) in the form of an image,
(2) as a spoken word,
(3) as a written word,
(4) as a coded word or image.
In this connection, the type of transmission according to (1) . . . (3) is normally characterized by continuous (analog) signals whilst discontinuous signals (e.g. pulses, digital signals) are usually produced in the case of the type of transmission according to (4).
Based on this general definition of a communication system, the invention relates to methods for allocating telecommunication channels of different channel capacity in a hybrid telecommunication system, particularly an “ISDN
DECT-specific RLL (Radio Local Loop)/WLL (Wireless Local Loop)” system according to the precharacterizing clause of claim
1
.
Hybrid telecommunication systems are, for example, communication systems containing different—wireless and/or wire-connected—telecommunication subsystems.
FIG. 1
shows—representative for the multiplicity of hybrid telecommunication systems—on the basis of the printed documents “Nachrichtentechnik Elektronik, Berlin 45 (1995) Vol. 1, pages 21 to 23 and Vol. 3 pages 29 and 30” and IEE Colloquium 1993, 173; (1993), pages 29/1-29/7; W. Hing, F. Halsall: “Cordless access to the ISDN basic rate service” on the basis of a DECT/ISDN Intermediate System DIIS according to ETSI Publication prETS 300xxx, Version 1.10, September 1996, an “ISDN
DECT-specific RLL/WLL” telecommunication system IDRW-TS (Integrated Services Digital Network
Radio in the Local Loop/Wireless in the Local Loop) with an ISDN telecommunication subsystem I-TTS [compare printed document “Nachrichtentechnik Elektronik, Berlin 41-43, Part: 1 to 10, P1: (1991) Vol. 3, pages 99 to 102; P2: (1991) Vol. 4, pages 138 to 143; P3: (1991) Vol. 5, pages 179 to 182 and Vol. 6, pages 219 to 220; P4: (1991) Vol. 6, pages 220 to 222 and (1992) Vol. 1, pages 19 to 20; P5: (1992) Vol. 2, pages 59 to 62 and (1992) Vol. 3, pages 99 to 102; P6: (1992) Vol. 4, pages 150 to 153; P7: (1992) Vol. 6, pages 238 to 241; P8: (1993) Vol. 1, pages 29 to 33; P9: (1993) Vol. 2, pages 95 to 97 and (1993) Vol. 3, pages 129 to 135; P10: (1993) Vol. 4, pages 187 to 190”] and a DECT-specific RLL/WLL telecommunication subsystem RW-TTS.
In this arrangement, the DECT/ISDN intermediate system DIIS and, respectively, the RLL/WLL telecommunication subsystem RW-TTS are preferably based on a DECT (Digital Enhanced (previously European) cordless telecommunication)/GAP system DGS; compare (1): Nachrichtentechnik Elektronik 42 (1992) January/February No. 1, Berlin, DE; U. Pilger “Struktur des DECT-Standards” (Structure of the DECT standard), pages 23 to 29 in conjunction with ETSI Publication ETS 300175-1 . . . 9, October 1992; (2): Telcom Report 16 (1993), No. 1, J. H. Koch: “Digitaler Komfort f{umlaut over (u)}r schnurlose Telekommunikation
DECT-Standard eröffnet neue Nutzungsgebiete” (Digital comfort for cordless telecommunication
DECT standard opens up new fields of application), pages 26 and 27; (3): tec 2/93—The technical magazine by Ascom “Wege zur universellen mobilen Telekommunikation” (Approaches to universal mobile telecommunication), pages 35 to 42; (4): Philips Telecommunication Review Vol. 49, No. 3, September 1991, R. J. Mulder: “DECT, a universal cordless access system”; (5): WO 93/21719 (
FIGS. 1
to
3
and associated description)]. The GAP (Generic Access Profile) standard is a subset of the DECT standard which has the task of ensuring the interoperability of the DECT air interface for telephone applications (compare ETSI Publication-prETS 300444, April 1995).
As an alternative, the DECT/ISDN intermediate system DIIS and, respectively the RLL/WLL telecommunication subsystem RW-TTS, can also be based on a GSM system (Groupe Sp{acute over (e)}ciale Mobile or Global System for Mobile Communication; compare Informatik Spektrum 14 (1991) June, No. 3, Berlin, DE; A. Mann: “Der GSM-Standard—Grundlage f{umlaut over (u)}r digitale europ{umlaut over (a)}ische Mobilfunknetze” (The GSM standard—basis for digital European mobile radio networks), pages 137 to 152). In the context of a hybrid telecommunication system it is also possible, instead, for the ISDN telecommunication subsystem I-TTS to be constructed as a GSM system.
In addition, further possibilities to be considered for implementing the DECT/ISDN intermediate system DIIS and, respectively, the RLL/WLL telecommunication subsystem RW-TTS or the ISDN telecommunication subsystem I-TTS are the systems mentioned initially, and future systems which are based on the known multiple-access methods FDMA, TDMA, CDMA (Frequency Division Multiple Access, Time Division Multiple Access, Code Division Multiple Access) and hybrid multiple-access methods formed from these.
The use of radio channels (e.g. DECT channels) in traditional line-connected telecommunication systems such as the ISDN is gaining increasing significance, particularly against the background of future alternative network operators without their own complete wire-line network.
Thus, it is intended to provide the ISDN subscriber with ISDN services at standard ISDN interfaces by means of the wireless RLL/WLL (Radio in the Local Loop/Wireless in the Local Loop) line interfacing technique, e.g. including the DECT system DS, for example in the RLL/WLL telecommunication subsystem RW-TTS (compare FIG.
1
).
In the “ISDN
DECT-specific RLL/WLL” telecommunication system IDRW-TS according to
FIG. 1
, a telecommunication subscriber (user) TCU (Telecommunication User) with his terminal equipment TE (also Terminal Endpoint) is tied in, e.g. via a standardized S interface (S-BUS), the preferably DECT-specific DECT/ISDN intermediate system DIIS (first telecommunication subsystem) contained in the RLL/WLL telecommunication subsystem RW-TTS and constructed as local information transmission loop, a further standardized S interface (S-BUS), a network termination NT and a standardized U interface of the ISDN telecommunication subsystem I-TTS (second telecommunication subsystem) into the ISDN world and all the services available therein.
The first telecommunication subsystem DIIS essentially consists of two telecommunication interfaces, a first telecommunication interface DIFS (DECT Intermediate Fixed System) and a second telecommunication interface DIPS (DECT Intermediate Portable System) which are connected to one another wirelessly, e.g. via a DECT air interface. Because of the quasi-stationary first telecommunication interface DIFS, the first telecommunication subsystem DIIS forms the local information transmission loop defined above in this connection. The first telecommunication interface DIFS contains a radio fixed part RFP, an interworking unit IWUI and an inte
Flake Horst
Kordsmeyer Martin
Gary Erika A.
Schiff & Hardin & Waite
Siemens Aktiengesellschaft
Trost William G.
LandOfFree
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