The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
May. 28, 1999
Timothy J. Wilson, Rolling Meadows, IL (US);
Hua Xu, Lake Zurich, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The present invention provides a method and apparatus for group calls in wireless CDMA communication systems, addressing the need for reliable and efficient reverse power control in CDMA group calls. A communication infrastructure (,) upon receiving a group call request from a communication unit (e.g.,,), allocates a single voice channel (e.g.,,) in each cell that provides service to one or more communication units of the group (,). The communication infrastructure further allocates a reverse power control channel (e.g.,,) to each communication unit of the group. Thus, each communication unit of the group receives voice information for the group call via the voice channel in that communication unit's site or cell, and each communication unit receives inbound (i.e., reverse) power control information via the reverse power control channel allocated to that communication unit. In this manner, the present invention efficiently provides reverse power control information to multiple communication units and, therefore, facilitates the establishment of group calls in CDMA systems.