Apparatus and methods for controlling a cellular communications network having airborne transceivers
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04Q-007/20
H04B-007/15
H04B-007/185
출원번호
US-0605083
(2000-06-26)
발명자
/ 주소
Gross, Jonathan H.
Emmons, Jr., Thomas Peter
Tessler, Michael A.
출원인 / 주소
Motorola, Inc.
대리인 / 주소
Ingrassia, Fisher & Lorenz, P.C.
인용정보
피인용 횟수 :
77인용 특허 :
30
초록▼
A cellular communications network (200, FIG. 2) includes one or more aircraft (210), which provide communication channels to cellular communications units, and also communicate with one or more base transceiver stations (206) and a control center (214). The control center receives (502, 602) telemet
A cellular communications network (200, FIG. 2) includes one or more aircraft (210), which provide communication channels to cellular communications units, and also communicate with one or more base transceiver stations (206) and a control center (214). The control center receives (502, 602) telemetry and flight parameter information from the aircraft, and calculates (510, 606) network parameters based on the information. The control center transmits (512, 608) messages to the cellular network, including the aircraft, based on the calculated network parameters, and the aircraft and cellular network controls (612) its operations according to information within these messages.
대표청구항▼
A cellular communications network (200, FIG. 2) includes one or more aircraft (210), which provide communication channels to cellular communications units, and also communicate with one or more base transceiver stations (206) and a control center (214). The control center receives (502, 602) telemet
A cellular communications network (200, FIG. 2) includes one or more aircraft (210), which provide communication channels to cellular communications units, and also communicate with one or more base transceiver stations (206) and a control center (214). The control center receives (502, 602) telemetry and flight parameter information from the aircraft, and calculates (510, 606) network parameters based on the information. The control center transmits (512, 608) messages to the cellular network, including the aircraft, based on the calculated network parameters, and the aircraft and cellular network controls (612) its operations according to information within these messages. forth in claim 1, wherein: said power transformer is a fly-back scheme switching power supply having a converter transformer; said switch element is connected in series to a primary coil of said converter transformer; and said magnetic substance is constituted by a secondary coil of said converter transformer. 4. The snubber circuit as set forth in claim 1, wherein: said power transformer is a switching power supply with a tapped inductor; and said magnetic substance is constituted by said the tapped inductor. 5. A power transformer comprising: a switch element operating for a power transformation control; a magnetic substance storing and releasing an energy in relation to power transformation that accompanies operation of said switch element; a commutating diode conducting by means of the energy stored in said magnetic substance; and a snubber circuit for suppressing voltage variations at a time of a turn-off of said switch element, wherein: said snubber circuit has a first series circuit consisting of a capacitor and a diode, and a second series circuit consisting of a coil and a diode; said first series circuit is connected in parallel to said commutating diode in a state that the capacitor thereof is connected to the magnetic connecting side in said commutating diode; and said second series circuit is connected between the connecting portion of the capacitor and the diode in said first series circuit and the commutating diode non-connecting side in said magnetic substance. 6. A forward scheme power transformer comprising: a converter transformer; a switch element connected in series to an end of a primary coil of said converter transformer so as to operate for a power transformation control; a rectifying diode connected to an end of a secondary coil of said converter transformer; a choke coil indirectly connected to the end of the secondary coil of said converter transformer through said rectifying diode or directly connected to another end of said secondary coil so as to store and release a power energy in relation to power transformation that accompanies operation of said switch element; a commutating diode connected in parallel to said rectifying diode and the another end of the secondary coil of said converter transformer so as to conduct by the power energy stored in said choke coil; and a snubber circuit for suppressing voltage variations at a time of a turn-off of said switch element, wherein: said snubber circuit has at least a first series circuit in which a capacitor and a diode are connected in series, and a second series circuit in which a coil and a diode are connected in series; said first series circuit is connected in parallel to said commutating diode in a state that the capacitor thereof is connected to said choke coil connecting side in said commutating diode; and the second series circuit is connected between a connecting portion of the capacitor and the diode in said first series circuit and a commutating diode non-connecting side in said choke coil. 7. A fly-back scheme power transformer comprising: a converter transformer; a switch element connected in series to a primary coil of said converter transformer so as to operate for a power transformation control; a commutating diode connected to an end of a secondary of said converter transformer and conducting by a power energy stored in said secondary coil; and a snubber circuit for suppressing voltage variations at a time of a turn-off of said switch element, wherein: said snubber circuit has at least a first series circuit in which a capacitor and a diode are connected in series, and a second series circuit in which a coil and a diode are connected in series; said first series circuit is connected in parallel to said commutating diode in a state that the capacitor thereof is connected to said choke coil connecting side in said commutating diode; and the second series circuit is connected between a connecting
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이 특허에 인용된 특허 (30)
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