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:
Jul. 12, 2005
Filed:
May. 29, 2002
Antti Toskala, Espoo, FI;
Esa Malkamaki, Espoo, FI;
Mikko J. Rinne, Helsinki, FI;
Anu Virtanen, Espoo, FI;
Guan Hao, Beijing, CN;
R. Thomas Derryberry, Plano, TX (US);
Antti Toskala, Espoo, FI;
Esa Malkamaki, Espoo, FI;
Mikko J. Rinne, Helsinki, FI;
Anu Virtanen, Espoo, FI;
Guan Hao, Beijing, CN;
R. Thomas Derryberry, Plano, TX (US);
Nokia Corporation, Espoo, FI;
Abstract
A system and method for random access channel (RACH) capture, where user equipment (UE) transmits a series of time-spaced access preambles each having an increasing power level to Node B and terminates access preamble transmission in response to an acquisition indicator (AI) signal returned from Node B and transmits its RACH message part. A collision detection preamble (CDP) is sent immediately after the message or embedded with the message. A collision detection indicator (CDI) signal matching the CDP is transmitted from Node B to the UE identified as having the failed RACH message requesting retransmission of the message. Optionally, the relative retransmission power level is also specified to the UE along with the CDI signal.