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:
Apr. 03, 2012
Filed:
May. 12, 2009
Ville O. Steudle, Turku, FI;
Juho Mikko Oskari Pirskanen, Tampere, FI;
Ladislav Kusnyer, Salo, FI;
Sami P. Hakala, Oulu, FI;
Jukka T. Vikstedt, Oulu, FI;
Harri Matti Johannes Valio, Kammenniemi, FI;
Markku Juhani Tarkiainen, Oulu, FI;
Ville O. Steudle, Turku, FI;
Juho Mikko Oskari Pirskanen, Tampere, FI;
Ladislav Kusnyer, Salo, FI;
Sami P. Hakala, Oulu, FI;
Jukka T. Vikstedt, Oulu, FI;
Harri Matti Johannes Valio, Kammenniemi, FI;
Markku Juhani Tarkiainen, Oulu, FI;
Nokia Corporation, Espoo, FI;
Abstract
Access to a wireless network is attempted by sending on a random access channel RACH at a first transmit power a first preamble comprising a signature sequence that is randomly selected from a set of signature sequences. After the access attempt from sending the first preamble is determined unsuccessful, access to the wireless network is re-attempted by sending on the RACH at a second transmit power a second preamble comprising a signature sequence, in which the second transmit power is no greater than the first transmit power. Embodiments variously combine different options: the signature sequences of the first and second preambles are each randomly selected separately, or the signature sequence of the first preamble is re-used in the second preamble; the first and second transmit powers are each equal to an initial transmit power, or the second transmit power is the initial power and less than the first transmit power.