Patent ID: 9210725
Filing Date: 2015-12-08
Classification: H04W

Abstract:
1. A method for improving uplink (UL) performance at a user equipment (UE), comprising: identifying failure of a random access channel (RACH) preamble when the UE is communicating with a current serving cell of the UE; increasing transmission power of successive RACH preambles in response to the identifying of the failure of the RACH preamble; identifying failure of the successive RACH preambles after increasing the transmission power of the successive RACH preambles; comparing signals received on a downlink at the UE via a first path and a second path from the current serving cell of the UE, wherein the comparing includes identifying that a difference between strength of the signals is within in a pre-defined range; and determining that a RACH preamble failure problem exists at the UE based at least on the comparing of the signals received on the downlink and the identifying of the failure of the successive RACH preambles.