Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1999-02-08
2002-05-28
Hunter, Daniel (Department: 2684)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S445000, C455S428000
Reexamination Certificate
active
06397069
ABSTRACT:
In telecommunication systems having a message transmission route between a message source and a message sink, transmitting and receiving devices are used for message processing and transmission, in which
1) the message processing and message transmission can be carried out in a preferred transmission direction (simplex operation) or in both transmission directions (duplex operation),
2) the message processing is analogue or digital,
3) the message transmission is wire-based over the trunk transmission route, or is carried out wire-free on the basis of various message transmission methods FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and/or CDMA (Code Division Muiltiple Access)—for example in accordance with radio standards such as DECT, GSM, WACS or PACS, IS-54, PHS, PDC, etc. [cf. IEEE Commications Magazine, January 1995, pages 50 to 57; D. D. Falconer et al.: “Time Division Multiple Access Methods for Wireless Personal Communications”].
“Message” is a generic term which covers both the useful content (information) and the physical representation (signal). Despite a message having the same useful content—that is to say the same information—different signal forms may occur. Thus, for example, a message relating to an object may be transmitted
(1) in the form of an image,
(2) as the spoken word,
(3) as the written word,
(4) as an encrypted word or image.
The type of transmission in accordance with (1) . . . (3) is in this case normally characterized by continuous (analogue) signals, while in the case of the transmission type according to (4), the signals are normally discontinuous (for example pulses, digital signals).
On the basis of this general definition of a message system, the invention relates to a method for controlling the setting up of telecommunication connections in telecommunication subsystems serving as local message transmission loops of telecommnication systems and having network terminations which differ with regard to the transmission channel requirements, in particular “ISDN/PSTN⇄DECT-specific RLL/WLL” systems, in accordance with the preamble of Patent Claim 1.
Using as references the documents “Nachrichtentechnik Elektronik [Telecommunications Electronics], Berlin 45 (1995) Issue 1, pages 21 to 23 and Issue 3, pages 29 and 30” as well as IEE Colloquium 1993, 173; (1993), pages 29/1-29/7; W. Hing, F. Halsall: “Cordless access to the ISDN basic rate service”, and on the basis of a DECT/ISDN Intermediate Systems DIIS according to ETSI publication prETS 300xxx, Version 1.09, Jul. 31, 1996,
FIG. 1
shows 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 [cf. document “Nachrichtentechnik Elektronik [Telecommunications Electronics], Berlin 41-43, Parts: 1 to 10, Part 1: (1991) Issue 3, pages 99 to 102; Part 2: (1991) Issue 4, pages 138 to 143; Part 3: (1991) Issue 5, pages 179 to 182 and Issue 6, pages 219 to 220; Part 4: (1991) Issue 6, pages 220 to 222 and (1992) Issue 1, pages 19 to 20; Part 5: (1992) Issue 2, pages 59 to 62 and (1992) Issue 3, pages 99 to 102; Part 6: (1992) Issue 4, pages 150 to 153; Part 7: (1992) Issue 6, pages 238 to 241; Part 8: (1993) Issue 1, pages 29 to 33; Part 9: (1993) Issue 2, pages 95 to 97 and (1993) Issue 3, pages 129 to 135; Part 10: (1993) Issue 4, pages 187 to 190;”] and a DECT-specific RLL/WLL Telecommunication Subsystem RW-TSS.
The DECT/ISDN Intermediate System DIIS and the RLL/WLL telecommunication subsystem RW-TSS are in this case preferably based on a DECT/GAP system DGS [Digital Enhanced (previously: European) Cordless Telecommunication; cf. (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 the ETSI publication ETS 300175-1 . . . 9, October 1992; (2): Telecom Report 16 (1993), No. 1, J. H. Koch: “Digitaler Komfort für schnurlose Telekommunikation—DECT-Standard eröffnet neue Nutzungsgebiete” [Digital convenience for cordless telecommunication—DECT standard opens up new fields of applications], pages 26 and 27; (3): tec 2/93—Das technische Magazin von Ascom “Wege zur universellen mobilen Telekommunikation” [The technical magazine from Ascom “Means for 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
with associated description)]. The GAP standard (Generic Access Profile) is a subset of the DECT standard which has the task of ensuring interoperability of the DECT radio interface for telephone applications (cf. ETSI publication prETS 300444, April 1995).
The DECT/ISDN Intermediate system DIIS and the RLL/WLL telecommunication subsystem RW-TSS can alternatively be based on a GSM system (Groupe Spéciale Mobile or Global System for Mobile Communication; cf. Inoformatik Spektrum 14 (1991) June, No. 3, Berlin, DE; A. Mann: “Der GSM-Standard—Grundlage für digitale europäische Mobilfunknetze” [The GSM standard—Basis for digital European mobile radio networks], pages 137 to 152). Instead of this, it is also possible in the context of a hybrid telecommuication system for the ISDN telecommunication subsystem I-TSS to be designed as a GSM system or PSTN system (Public Switched Telecommunication Network).
Furthermore, further possible ways for realizing the DECT/ISDN Intermediate System DIIS, the RLL/WLL telecommunication subsystem RW-TSS or the ISDN telecommunication subsystem I-TTS include the systems mentioned in the introduction as well as 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 them.
The use of radio channels (for example DECT channels) in classical cable-based telecommunication systems, such as ISDN, is becoming increasingly important, particularly against the background of future alternative network operators without their own complete cable network.
Thus, for example in the case of the RLL/WLL telecommunication subsystem RW-TSS, the wire-free connection technology RLL/WLL (Radio in the Local Loop/Wireless in the Local Loop) for example including the DECT system DS, ISDN services should be made available to the ISDN subscriber on standard ISDN interfaces (cf. FIG.
1
).
In the “ISDN⇄DECT-specific RLL/WLL” telecommunication system IDRW-TS according to
FIG. 1
, a telecommunication subscriber (user) TCU (Tele-Communication User) with terminal TE (Terminal Endpoint; Terminal Equipment), is included in the ISDN world, with the services available in it, for example via a standardized S interface (S-BUS), the DECT/ISDN Intermediate System DIIS, which is designed as a local message transmission loop—is preferably DECT-specific and is contained in the RLL/WLL telecommunication subsystem RW-TSS—(first telecommunication subsystem), a further standardized S interface (S-BUS), a Network Termination NT and a standardized U interface of the ISDN telecommunication subsystem I-TTS (second telecommnication subsystem).
The first telecommunication subsystem DIIS essentially comprises 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 without wires, for example via a DECT radio interface. Because of the quasi-position-based first telecommunication interface DIIS, the first telecommunication subsystem DIIS forms the local message transmission loop defined above in this context. The first telecommuication interface DIFS contains a Radio Fixed Part RFP, an InterWorking Unit IWU
1
and an INterface Circ
Biedermann Rolf
Dicker Olaf
Kordsmeyer Martin
Bell Boyd & Lloyd LLC
Chow Charles
Hunter Daniel
LandOfFree
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