Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1996-02-05
2003-03-18
Cumming, William (Department: 2684)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
Reexamination Certificate
active
06535731
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a universal mobile telecommunications system having an expanded cordless telecomunnication system.
Modern mobile communications, for example mobile telecommunications for the transmission of voice, data, text, graphics, fixed and moving images, is divided up into a private sector and public sector in analogy with stationary communications (for example ISDN communications system; Integrated Services Digital Network). In addition, in the case of mobile telecommunications (first and second generation), a distinction is made between cellular telecommunications and cordless telecommunications. Cordless telecommunications has until now been based substantially on cordless telecommunications systems for home and office applications, while cellular telecommunications is dominated by the use of mobile radio telecommunications systems.
For the mobile telecommunications systems mentioned above, in particular those of the second generation, in most cases a TDMA method (Time Division Multiple Access) is used for the accessing and multiplexing of the signals to be transmitted. For future mobile telecommunications systems (for example third generation), however, the CDMA transmission method (Code Division Multiple Access) will also gain in significance, not least because of the likely use of cell-oriented transmission methods (ATM method; Asynchronous Transfer Mode). The reason for this is that, for an ever increasing number of communications and information services on offer and at the same time increasing requirements demanded in terms of the quality and quantity of the bit rates for transmission, an ever greater role will be played not only by the accessing and multiplexing methods but also by the optimized signal coding, channel coding for a flexible air interface.
The TDMA and CDMA transmission methods ultimately form the basis for the various system standards in mobile telecommunications. With regard to the TDMA method, the cordless telecommunications systems currently introduced on the market are set up in accordance with, inter alia, the digital pan-European DECT standard (Digital European Cordless Telecommunication) and the digital CT
2
standard (Cordless Telephone
2
), while the mobile radio telecommunications systems are set up in accordance with the worldwide GSM standard (Groupe Spéciale Mobile; Global System for Mobile Communications).
The further development of mobile communications in a spiral of effects according to
FIG. 1
(Telcom Report 15; 1992; issue 2, pages 57 to 59) will lead to the already mentioned third generation of mobile telecommunications systems, in which the existing separation between cellular and cordless telecommunications is brought to an end. This third generation of mobile telecommunications is distinguished by universal mobility (in terms of time and location), in which each communications subscriber can be reached anywhere and at any time. With respect to this universal mobility, a distinction is drawn between equipment-related mobility via air connections and person-related mobility via air connections and cable connections. The inclusion of both aspects in universal mobile communications leads to “Advanced Mobility” with a universal mobile telecommunications system (UMTS=Universal Mobile Telecommunication System) in conjunction with universal personal telecommunications (UPT=Universal Personal Telecommunication). The universal mobile telecommunications system (UMTS) requires both flexible air interfaces and an intelligent network infrastructure. It is ensured by such a system structure that, on the one hand, mobile subscribers can communicate with one another at different speeds and traffic densities and, on the other hand, a large number of telecommunications and message services (information services) can be offered with high quality and capacity.
In
FIG. 2
there is represented on the basis of the publication Telcom Report 15; 1992; issue 2, pages 60 to 63 a “Universal Mobile Communications—Advanced Mobility” scenario with the various applications with respect to the cell radius. According to this, the set-up of the universal mobile telecommunications system (UMTS) is subdivided into different communications cells for the application areas (office, home, town and country). These cells may be linked to one another two-dimensionally (country, town) or three-dimensionally (buildings). According to the representation in
FIG. 2
, the various types of mobile telecommunications (cordless, radio and satellite telecommunications SL-TK, MF-TK, SF-TK) are represented separately or in a mixed form in dependence on the cell radius.
In its pure, separate form for office and home applications, cordless telecommunications SL-TK takes place in the picocell range. In this picocell range—with a picocell radius PIZR of up to 200 m (transmission range)—there is at least one picocell PIZ with a cordless telecommunications system SL-TKS. The cordless telecommunications system SL-TKS in this case comprises a picocell-individual base station PIZ-BS (cordless base station) and at least one picocell-individual mobile station PIZ-MS (cordless mobile station) assigned to the base station PIZ-BS. If—as above and in the following—terms with the ending “cell-individual(ly)” are used in conjunction with an object/an activity/a characteristic, the object/the activity/the characteristic which is dedicated to a cell (for example a picocell, microcell, macrocell and hypercell) or belongs to a cell is meant by this.
In its pure, separate form for town or country applications, mobile radio telecommunications MF-TK takes place in stationary property (for example buildings) and/or in dynamic, mobile property (for example a car, train, etc.) in the macrocell range. In this macrocell range—with a macrocell radius MAZR of, for example, up to 20 km (transmission range)—, which covers the picocell range with the picocell PIZ and a microcell range with at least one microcell MIZ, there is at least one macrocell MAZ with a mobile radio telecommunications system MF-TKS. This mobile radio telecommunications system MF-TKS in this case comprises a macrocell-individual base station MAZ-BS (mobile radio base station), which may be of a stationary or mobile set-up (for example a car, train), and at least one macrocell-individual mobile station MAZ-MS (mobile radio mobile station) assigned to the base station MAZ-BS.
As an addition to cordless and mobile radio telecommunications SL-TK, MF-TK, satellite telecommunications SF-TK takes place in a hypercell range. In this hypercell range—with a hypercell radius HYZR of several hundred kilometers (transmission range)—there is at least one hypercell HYZ with a satellite telecommunications system SF-TKS. This satellite telecommunications system SF-TKS in this case comprises a satellite SAT, for example positioned in geostationary earth orbit, of a hypercell-individual base station HYZ-BS, which may be of a stationary set-up as an earth station ES or a mobile set-up as a mobile earth station MES (for example in an airplane, ship, truck, etc.), and at least one hypercell-individual mobile station HY-ZMS assigned to the base station HYZ-BS.
In the case of the mixed form of the three types of mobile telecommunications mentioned above, there is used, for example, for the realization of the “advanced mobility” concept within the universal mobile telecommunications system (UMTS) a network infrastructure NIS (ISDN=Integrated Services Digital Network, B-ISDN=Broadband Integrated Services Digital Network).
This network infrastructure NIS is, for example, a narrowband or broadband ISDN communications system. In the publication Telcom Report 8; 1985; special issue with the title “Diensteintegrierendes Digitalnetz ISDN” [Integrated Services Digital Network ISDN]—entire document—there is described a narrowband ISDN communications system and in the publications Telcom Report 14; 1991; special issue with the title “Telcom '91”—pages 12 to 19 (“Vision ONE—Optimierte Netz-Evo
Pillekamp Klaus-Dieter
Tasto Manfred
Bell Boyd & Lloyd LLC
Cumming William
Siemens Aktiengesellschaft
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