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:
Jan. 25, 2011
Filed:
Oct. 06, 2004
Joakim Bergström, Stockholm, SE;
Ingela Ericsson, Bromma, SE;
Peter Edlund, Tumba, SE;
Dirk Gerstenberger, Kista, SE;
Joakim Bergström, Stockholm, SE;
Ingela Ericsson, Bromma, SE;
Peter Edlund, Tumba, SE;
Dirk Gerstenberger, Kista, SE;
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Abstract
The present invention relates to multicast communication systems and in particular to the implementation of a random access uplink channel, which can be used, e.g., for transmission of acknowledgement messages for received data. In order to prevent frequent collisions on said channel, the transmission of acknowledgement messages is spread at least over time or, additionally, with regard to another distinguishing channel property, e.g. a RACH sub-channel or RACH-signature.