Fast call setup in a CDMA dispatch system

Details Fast call setup in a CDMA dispatch system Fast call setup in a CDMA dispatch system

1997-10-28

1999-06-22

Olms, Douglas W.

Multiplex communications

Channel assignment techniques

Combining or distributing information via code word channels...

370331, 370337, 370342, 455 134, 455442, H04J 1300

Patent

active

059149582

ABSTRACT:
A quality dispatch service on a CDMA based wireless system. To achieve spectral efficiency and fast access for follow-up calls, in response to a request by a talkgroup member to have a group call established, the non-requesting (listening-only) members are allowed to establish a low-rate (non-voice) signaling link in the reverse direction (inbound) for the limited purpose of (i) providing forward power control information to the fixed infrastructure; (ii) requesting soft hand-off when required; and (iii) maintaining the correct reverse link power control to allow for fast channel access for a follow-on call. In accordance with the illustrative embodiment, the establishment of multiple inbound signaling links in a CDMA dispatch call occurs as a background process while beginning the voice communications immediately.

REFERENCES:
patent: 5295152 (1994-03-01), Gudmundson et al.
patent: 5724648 (1998-03-01), Shoughnessy et al.
patent: 5768684 (1998-06-01), Grubb et al.
patent: 5781536 (1998-07-01), Ahmadi et al.

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