Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1994-06-29
1996-06-11
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
371 55, 371 35, H04Q 720, H03M 1300
Patent
active
055263992
ABSTRACT:
A data transmission system for a radio section is improved in that the transmission rate can change in response to circuit conditions in the radio section, and FEC (forward error correction) and ARQ (automatic repeat request) can be used singly or in combination to achieve maximum transmission efficiency. The system includes an interworking apparatus 6 connected to a mobile communication switching network. Interworking apparatus 6 includes interface section 61 for transmitting and receiving a wire transmission signal from a fixed telephone network and a radio transmission signal from a mobile station, protocol conversion section 63 for converting a wire transmission signal to a radio transmission signal and for converting a radio transmission signal to a wire transmission signal, storage section 64 in which information regarding transmission rates and error controlling modes is stored in advance, and control section 62 which refers to storage section 64 and selects a transmission rate and an error controlling mode in response to circuit conditions of the radio section.
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"Error Control Coding", Shu Lin et al. pp. 458-459, 477-481 1983.
Kuntz Curtis
NEC Corporation
Trost William G.
LandOfFree
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