公开(公告)号：CA2158305C

公开(公告)日：2001-12-11

申请号：CA2158305

申请日：1995-09-14

Applicant: IBM

Inventor： CHIEU TRIEU CHAN ,  NARASIMHAN ANAND ,  O'NEIL GARY E ,  ZAI LI-CHENG R

IPC: H04L5/14 ,  H04B7/26 ,  H04J3/00 ,  H04M1/725 ,  H04Q7/38

Abstract: Direct communication between a primary portable unit initiating the communic ation 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 m ade, the second handshaking operation is performed to establish communication in an unoccupi ed channel. The base station channel and the unoccupied channel may be a TDMA/TDD channe l or a TDMA/FDD channel.

公开(公告)号：DE69533976D1

公开(公告)日：2005-03-10

申请号：DE69533976

申请日：1995-11-16

Applicant: IBM

Inventor： CHIEU TRIEU CHAN ,  NARASIMHAN ANAND ,  O'NEIL GARY ERNEST ,  ZAI LI-CHENG R

IPC: H04L5/14 ,  H04B7/26 ,  H04J3/00 ,  H04M1/725 ,  H04Q7/38 ,  H04Q7/30

Abstract: Direct communication between a primary portable unit initiating the communication and a secondary portable unit is established 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.

公开(公告)号：DE69533976T2

公开(公告)日：2006-01-19

申请号：DE69533976

申请日：1995-11-16

Applicant: IBM

Inventor： CHIEU TRIEU CHAN ,  NARASIMHAN ANAND ,  O'NEIL GARY ERNEST ,  ZAI LI-CHENG R

IPC: H04L5/14 ,  H04B7/26 ,  H04J3/00 ,  H04M1/725 ,  H04Q7/30 ,  H04Q7/38

Abstract: Direct communication between a primary portable unit initiating the communication and a secondary portable unit is established 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.

公开(公告)号：CA2158305A1

公开(公告)日：1996-05-18

申请号：CA2158305

申请日：1995-09-14

Applicant: IBM

Inventor： CHIEU TRIEU CHAN ,  NARASIMHAN ANAND ,  O'NEIL GARY E ,  ZAI LI-CHENG R

IPC: H04L5/14 ,  H04B7/26 ,  H04J3/00 ,  H04M1/725 ,  H04Q7/38

Abstract: Direct communication between a primary portable unit initiating the communic ation 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 m ade, the second handshaking operation is performed to establish communication in an unoccupi ed channel. The base station channel and the unoccupied channel may be a TDMA/TDD channe l or a TDMA/FDD channel.