Method for producing a semiconductor storage device

Details Method for producing a semiconductor storage device Method for producing a semiconductor storage device

2001-03-22

2003-11-18

Maung, Nay (Department: 2684)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S069000, C370S318000

Reexamination Certificate

active

06650907

ABSTRACT:

BACKGROUND OF THE INVENTION
Telecommunications systems with wireless telecommunications between mobile and/or stationary transceivers are special communication systems with a message transmission path between a message source and a message sink in which, for example, base stations and mobile parts are used as transceivers for message processing and transmission and in which
1) the message processing and message transmission can take place in one preferred direction of transmission (simplex mode) or in both directions of transmission (duplex mode),
2) the message processing is preferably digital,
3) the message transmission takes place wirelessly via the long-distance transmission link on the basis of various message transmission methods for multiple utilization of the message transmission link FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and/or CDMA (Code Division Multiple Access)—e.g. according to radio standards such as DECT [Digital Enhanced (previously: European) Cordless Telecommunications; compare
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 and the DECT Publication of the
DECT Forum
, February 1997, pages 1 to 16], GSM [Groupe Speciale Mobile or Global System for Mobile Communication; compare
Informatik Spektrum
14 (1991) June, No. 3, Berlin, DE; A. Mann: “
Der GSM—Standard—Grundlage für digitale europäische digital European mobile radio networks
], pages 137 to 152 in conjunction with the publication
telekom praxis
April 1993, P. Smolka “
GSM
-
Funkschnittstelle—Elemente und Funktionen”, [GSM Radio Interface—Elements and Functions
], pages 17 to 24], UMTS [Universal Mobile Telecommunications System; compare (1):
Nachrichtentechnik Elektronik, Berlin
45, 1995, vol. 1, pages 10 to 14 and vol. 2, pages 24 to 27; P. Jung, B. Steiner: “
Konzept eines CDMA
-
Mobilfunksystems mit gemeinsamer Detektion für die dritte Mobilfunkgeneration” [Concept of a CDMA mobile radio system with joint detection for the third mobile radio generation
]; (2):
Nachrichtentechnik Elektronik, Berlin
41, 1991, vol. 6, pages 223 to 227 and page 234; P. W Baier, P. Jung, A. Klein: “
CDMA—ein günstiges Vielfachzugriffsverfahren für frequenzselektive und zeitvariante Mobilfunkkanäle” [CDMA—a favorable multiple access method for frequency
-
selective and time
-
variant mobile radio channels
]; (3):
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
, Vol. E79-A, No. 12, December 1996, pages 1930 to 1937; P. W. Baier, P. Jung: “
CDMA Myths and Realities Revisited
”; (4):
IEEE Personal Communications
, February 1995, pages 38 to 47; A. Urie, M Streeton, C Mourot: “
An Advanced TDMA Mobile Access System for UMTS
”; (5):
telekom praxis
, May 1995, pages 9 to 14; P. W. Baier: “
Spread
-
Spectrum
-
Technik und CDMA—eine ursprüglich militärische Technik erobert den zivilen Bereich” [Spread Spectrum Technology and CDMA—a technology of military origin conquers the civil domain
]; (6):
IEEE Personal Communications
, February 1995, pages 48 to 53; P. G. Andermo, L. M. Ewerbring: “
An CDMA
-
Based Radio Access Design for UMTS
”; (7):
ITG Pachberichte
124 (1993),
Berlin, Offenbach: VDE Verlag ISBN
3-8007-1965-7, pages 67 to 75
; Dr. T. Zimmermann, Siemens AG: “Anwendung von CDMA in der Mobilkommunikation” [Applying CDMA in mobile communications
]; (8):
telecom report
16, (1993), vol. 1, pages 38 to 41
; Dr. T. Ketseoglou, Siemens AG and Dr. T. Zimmermann, Siemens AG: “Effizienter Teilnehmerzugriff für die
3
. Generation der Mobilkommunikation—Vielfachzugriffsverfahren CDMA macht Luftschnittstelle flexibler” [efficient subscriber access for the
3
rd generation of mobile communications—the multiple access method CDMA makes the air interface more flexible
]; (9):
Funkschau June
1998
: R. Sietmann “Ringen um die UMTS
-
Schnittstelle” [The struggling for the UMTS interface
], pages 76 to 81] WACS or PACS, IS-54, IS-95, 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”].
“Message” is a generic term which stands both for the meaning (information) and for the physical representation (signal). Even if a message has the same meaning—i.e. the same information—different signal forms can occur. Thus, for example, a message concerning an object can be transmitted
(1) in the form of an image,
(2) as spoken word,
(3) as written word,
(4) as encrypted word or image.
The type of transmission according to (1) . . . (3) is here normally characterized by continuous (analog) signals, whereas the type of transmission according to (4) normally produces discontinuous signals (e.g. pulses, digital signals).
It is of great importance to carry out a power control for the telecommunications systems specified above, and especially for the CDMA-based telecommunications systems, because of the “near-far” (compare: (10) K. D. Kammeyer “Nachrichtenübertragung” [Message Transmission], B. G. Teubner Stuttgart 1996, chapter 16.1.3, especially page 636; (11) K. David/T. Benkner “Digitale Mobilfunksysteme” [Digital Mobile Radio Systems], B. G. Teubner Stuttgart 1996, chapter 8.7.2.2, especially page 414).
Power control is known as a means for reducing interference in multicellular mobile radio networks. The basic idea is to allocate to each subscriber only the amount of transmitting power currently needed by him for achieving the desired quality of service. This measure clearly reduces the interference with respect to other subscribers in the same or adjacent cells. However, this technique can only be applied to so-called “point-to-point” connections in cellular mobile radio since, in this case, the transmitting powers to be used for the transmission, e.g. between stationary and mobile transceivers, that is from a base station or fixed part to the mobile station or mobile part and vice versa, can be explicitly dedicated to the link between the base station and mobile station.
In mobile radio telecommunications systems (e.g. GSM, UMTS) which operate preferably in licensed coordinated system operation, and in cordless telecommunications systems (e.g. DECT, PHS etc.) which preferably operate in unlicensed uncoordinated system operation, however, point-to-multipoint connections are also used. Channels using such links are generally Control Channels, the so-called “Common Control Channels (CCCH)”. The most important representative of this category is, without any doubt, the so-called “Broadcast Control Channel (BCCH)”. It is radiated in the down link (DL) by the base station. The broadcast control channel has the task of transporting cell-related information and synchronization information. These information items are used by all mobile stations located within the cell. Since, however, the positions of the mobile stations within the radio cell and thus also the transmitting powers needed can differ greatly, it is not possible to control the transmitting power of the broadcast control channel in cellular mobile radio. As a rule, the transmitting power of the broadcast control channel is adapted in such a manner that it can still be received with adequate power by all mobile stations at the edge of the cell.
Power control is not used either for the “traffic channel (TCH)” or for the “broadcast control channel” in the previous cordless telecommunications systems (e.g. DECT).
SUMMARY OF THE INVENTION
The object forming the basis of the invention consists in controlling the transmitting power provided for point-to-multipoint telecommunications links in a telecommunications system with wireless telecommunications and uncoordinated unlicensed system operation—especially in a universal mobile telecommunicat

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