Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2005-01-25
2005-01-25
Pham, Chi (Department: 2667)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S337000, C455S463000
Reexamination Certificate
active
06847627
ABSTRACT:
A wireless telephone system comprises a base unit coupleable to one or more external telephone lines and having a base transceiver, and a plurality of wireless handsets which may be active or inactive. Each handset has a handset transceiver for establishing a time-division multiple access (TDMA) link, when said handset is active, over a shared RF channel with the base unit via the base transceiver. In communicating via a TDMA link, each active handset communicates during an exclusive time slice of a TDMA scheme that allocates time slices to active handsets, wherein a number of data samples having a sample size are transmitted during each time slice. At least two handsets alternatingly share a time slice, when one of said two handsets is to establish a new TDMA link and when establishing said new TDMA link would exceed the available channel capacity. Time slices are shared by reducing the sample size and thereby increasing the number of data samples transmitted during said shared time slices.
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International Telecommunication Union: “40, 32, 24, 16, kbit/s Adaptive Differential Pulse Code Modulation ADPCM” General Aspects of Digital Transmission Systems. Terminal Equipments, vol. 726, No G, Apr. 23, 1992, pp. 1-4, 6, 8-15.
Knutson Paul Gothard
Ramaswamy Kumar
Hoang Thai
Kolodka Joseph J.
Pham Chi
Thomson Licensing S.A.
Tripoli Joseph S.
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