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:
Jun. 11, 2002
Filed:
Dec. 22, 1998
Shahrokh Amirijoo, Richardson, TX (US);
Charles M. Feltner, Plano, TX (US);
Ericsson INC, Research Triangle Park, NC (US);
Abstract
A system, method, and apparatus for transmitting and receiving group calls are illustrated. The group call register includes a counter value which identifies particular calls. The counter value is transmitted in the notification message, thereby identifying both the group and the group call. After the subscriber finishes listening to the group call, the subscriber can cause the mobile station to store the group identification number and the counter value in the group call history memory to prevent being alerted of the same group call in the event that the call is repeated. Additionally, the mobile station establishes a point-to-point call to an acknowledgment center and transmits the group identification number as well as the counter value. The group identification number and the counter value are stored in the acknowledgement center, thereby establishing a record of mobile stations that have listened to particular calls.