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:
Aug. 20, 1991
Filed:
Nov. 05, 1986
Yoshio Ichikawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A single-frequency signal communications system such as a paging network includes plural communication groups, each of which includes one master station and plural slave stations. The master stations of at least adjacent groups are within each others' reception zones. To avoid signal collision problems, each master station refrains from initiating transmission of a data signal unitl it has failed to detect the carrier signal of any other master station for a time period T. The designated slave station acknowledges receipt of the data signal by transmitting an acknowledgment signal within a period t after receiving the data signal. The time period T is greater than the time period t in order to avoid master station-slave station signal collision problems.