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:
Mar. 29, 2016
Filed:
Sep. 16, 2011
Wei Zhao, Solna, SE;
Tobias Tynderfeldt, Solna, SE;
Wei Zhao, Solna, SE;
Tobias Tynderfeldt, Solna, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
In order to provide a more robust contention-free random access procedure for use in a cellular wireless network and specifically, a contention-free random access procedure that is able to recover more quickly in case of failure a method for a radio access node () that is arranged in a wireless network and communications with user equipment, UE () and a radio access node are proposed. The method includes: receiving a first random access message () from a UE, the first message containing a pre-assigned contention-free random access preamble and representing a start of a random access procedure; responding to the received first message by sending a second message () to the UE, the second message containing time alignment information to enable a scheduled transmission of a third message () by the UE; ascertaining that no third message is received from the UE within a predetermined period of time and transmitting a command () to the UE ordering a restart of the random access procedure with the same pre-assigned contention-free random access preamble.