Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2000-01-18
2004-08-24
Nguyen, Chau (Department: 2663)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S336000, C370S342000, C370S347000
Reexamination Certificate
active
06781975
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a method for adapting wireless telecommunication systems to be compatible with multiple access telecommunication systems.
2. Description of the Related Art
In message systems having a message transmission path between a message source and a message destination transmission and reception devices are employed for message processing and transmission, whereby
1) the message processing and message transmission can ensue in a preferred transmission direction (which is referred to as simplex mode) or in both transmission directions (which is referred to as duplex mode);
2) the message processing is analog or digital;
3) the message transmission via the long distance transmission path is wire-bound or ensues on the basis of various message transmission methods FDMA (frequency division multiple access), TDMA (time division multiple access) and/or CDMA (code division multiplex access)—for example, according to radio standards such as DECT, GSM, WACS or PACS, IS-54, IS-95, PHS, PDC, etc. [See IEEE Communications Magazine, January 1995, pages 50 through 57; D. D. Falconer et al, “Time Division Multiple Access Methods for Wireless Personal Communications”], ensuing, namely, wirelessly (for example, by radio transmission).
In the context of the present application, the term “Message” is a higher-ranking term that stands both for the content (information) as well as for the physical representation (signal of the communication). Despite the same content of a message—i.e., the same information—different signal forms can occur. Thus, for example, a message relating to a given subject matter can be transmitted
(1) in the form of an image,
(2) as a spoken word message,
(3) as a written wordy message or,
(4) as an encrypted word or image.
The transmission type according to (1) . . . (3) above is thereby normally characterized by continuous (analog) signals, whereas discontinuous signals (for example, pulses, digital signals) generally arise in the transmission type according to (4).
Proceeding on the basis of this general definition of a message system, present the invention is directed to a wireless telecommunication system having CDMA, FDMA and TDMA multiple access components, particularly a “JD-CDMA” developed communication system that is hybrid with respect to multiple access methods.
In view of a universal mobile telecommunication system (UMTS), wireless telecommunication systems with CDMA, FDMA and TDMA multiple access components, particularly “JD-CDMA” telecommunication systems that are hybrid with respect to multiple access methods are referred to as the future radio telecommunication scenario of the third generation according to the publications (1): Nachrichtentechnik Elektronik, Berlin 45, 1995, No. 1, pages 10 through 14 and No. 2, pages 24 through 27, P. Jung, B. Steiner, “Konzept eines CDMA-Mobilfunksystems mit gemeinsamer Detektion für die dritte Mobilfunkgeneration”; (2): Nachrichtentechnik Elektronik, Berlin 41, 1991, No. 6, pages 223 through 227 and page 234, P. W. Baier, P. Jung, A. Klein: “CDMA—ein günstiges Vielfachzugriffsverfahren für frequenzeselektive and zeitvariante Mobilfunkkanäle”; (3): IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E79-A, No. 12, December 1996, pages 1930 through 1937; P. W. Baier, P. Jung: “CDMA Myths and Realities Revisited”; (4): IEEE Personal Communications, February 1995, Pages 38 through 47; A. Urie, M. Streeton, C. Mourot: “An Advanced TDMA Mobile Access System for UMTS”; (5): Telekom Praxis, 5/1995, Pages 9 through 14, P. W. Baier: “Spread-Spectrum-Technik and CDMA—eine ursprünglich militärische Technik erobert den zivilen Bereich”; (6): IEEE Personal Communications, February 1995, Pages 48 through 53; P. G. Andermo, L. M. Ewerbring: “An CDMA-Based Radio Access Design for UMTS”; (7): ITG Fachberichte 124 (1993), Berlin, Offenbach: VDE Verlag ISBN 3-8007-1965-7, Pages 67 through 75; Dr. T. Zimmermann, Siemens AG: “Anwendung von CDMA in der Mobilkommunikation”.
In the micro-cell or, respectively, macro-cell area of the GSM-specific radio telecommunication system, the radio telecommunication scenario of the second generation is being currently defined (Global System for Mobile Communication; see (1): Informatik Spektrum 14 (1991) June, No. 3, Berlin, DE, A. Mann: “Der GSM-Standard—Grundlage für digitale europäische Mobilfunknetze”, Pages 137 through 152; (2): R. Steele: Mobile Radio Communications, Pentech Press, 1992 (Reprint 1994), Chapter 8: The Pan-European Digital Cellular Mobile Radio System—known as GSM, Pages 677 ff) and are being defined in the Pico-cell region by the DECT Telecommunication System [digital enhanced (previously: European) cordless telecommunication; see (1): Nachrichtentechnik Elektronik 42 (1992) January/February, No. 1, Berlin, DE, U. Pilger, “Struktur des DECT-Standards”, Pages 23 through 29 in conjunction with ETSI Publication ETS 300175-1 . . . 9, October 1992; (2): Telcom Report 16 (1993), No. 1, J. H. Koch: “Digitaler Komfort für schnurlose Telekommunikation—DECT-Standard eröffnet neue Nutzungsgebiete”, Pages 26 and 27; (3): tec 2/93—the technical magazine of Ascom, “Wege zur universellen mobilen Telekommunikation”, Pages 35 through 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 through 3
with appertaining description)].
FIG. 1
shows the TDMA frame and TDMA time slot structure of the GSM mobile radio telephone concept known from the publications (1): Informatik Spektrum 14 (1991) June, No. 3, Berlin, DE, A. Mann: “Der GSM-Standard—Grundlage für digitale europäische Mobilfunknetze”, Pages 137 through 152; (2): R. Steele: Mobile Radio Communications, Pentech Press, 1992 (Reprint 1994), Chapter 8: The Pan-European Digital Cellular Mobile Radio System—known as GSM, Pages 677 ff).
FIG. 2
shows a multiple access in the uplink (transmission direction “Mobile Part→abase station”) from the publication Nachrichtentechnik Elektronik, Berlin 45, 1995, No. 1, Pages 10 through 14 and No. 2, Pages 24 through 27, P. Jung, B. Steiner, “Konzept eines CDMA-Mobilfunksystems mit gemeinsamer Detektion für die dritte Mobilfunkgeneration”, which is particularly shown in
FIG. 4
of this publication—standing for the plurality of wireless telecommunication systems with CDMA, FDMA and TDMA multiple access components—of a joint detection CDMA mobile radio concept.
For example, the plurality of subscribers simultaneously active in a time slot is K=8.
FIG. 3
, proceeding from the illustration of the multiple access in
FIG. 2
, shows the time slot structure (burst structure) of the uplink (transmission direction “mobile part→base station”) of the joint detection CDMA mobile radio concept that is known from the publication Konzept eines CDMA-Mobilfunksystems mit gemeinsamer Detektion für die dritte Mobilfunkgeneration”, being particularly shown in
FIG. 5
of this publication.
The 24 data symbols of the payload data blocks indicated in
FIG. 3
are spread with a subscriber-specific spread code having a spread factor of Q=14, so that each data symbol contains 14 data elements fashioned as “chip”.
SUMMARY OF THE INVENTION
The object underlying the present invention is comprised in adapting a wireless telecommunication system with a CDMA, FDMA and TDMA multiple access component, particularly what is a hybrid “JD-CDMA” telecommunication system with respect to multiple access methods compatibly to a GSM-specific/DECT-specific (micro-cell, macro-cell and/or Pico-cell-specific) telecommunication system with respect to the air interface.
As a result thereof, it is possible, on the one hand, to accept system components that have been hitherto successfully employed in GSM products/DECT products (micro-cell, macro-cell, and/or Pico cell-specific products) of the second mobile radio telephone/cordless telecommunication generation in future wireless telecommu
Bahrenburg Stefan
Baier Paul Walter
Euscher Chritoph
Mayer Jürgen
Schlee Johannes
Bell Boyd & Lloyd LLC
Hyun Soon-Dong
Nguyen Chau
Siemens Aktiengesellschaft
LandOfFree
Wireless telecommunications system with a CDMA, FDMA and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wireless telecommunications system with a CDMA, FDMA and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wireless telecommunications system with a CDMA, FDMA and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3269921