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:
Nov. 25, 2008
Filed:
Apr. 20, 2000
Applicant:
Mark Grayson, Chiswick, GB;
Inventor:
Mark Grayson, Chiswick, GB;
Assignee:
ICO Services Ltd, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 7/212 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a cellular mobile telephone system, a mobile station () requests allocation of a traffic channel by sending a request in a random access channel. Where there is a significant path length difference between locations in a cell and a network antenna, for instance on a satellite (), not all of the available TDMA slots are used for random access signals. Instead, gaps of one to three time slots are left between valid random access time slots () to avoid collision between random access bursts arriving at the network antenna along paths of different lengths.