H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/26 (2006.01) H04M 1/725 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2158305
Direct communication between a primary portable unit initiating the communication and a secondary portable unit is establishecl utilizing two handshaking operations. The first handshaking operation is performed in the base station channel to establish initial contact between the primary and secondary portable units. After initial contact is made, the second handshaking operation is performed to establish communication in an unoccupied channel. The base station channel and the unoccupied channel may be a TDMA/TDD channel or a TDMA/FDD channel.
Chieu Trieu Chan
Narasimhan Anand
O'neil Gary E.
Zai Li-Cheng R.
International Business Machines Corporation
Saunders Raymond H.
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