Patent ID: 8964658
Filing Date: 2015-02-24
Classification: H04W

Abstract:
1. A method for contention-based (CB) uplink transmission in a wireless communication network, the method comprising: receiving, by a user equipment (UE), CB configuration information and an uplink CB grant from a serving base station in the wireless communication network, wherein the uplink CB grant is received before transmitting UE-selected signature information; deriving a plurality of transmission opportunities from the uplink CB grant and in response transmitting uplink CB data via radio resource blocks of an uplink data channel correspond to one of the transmission opportunities, wherein the radio resource blocks carry both the uplink CB data and the UE-selected signature information, wherein the uplink CB data is carried by data tones and the UE-selected signature information is embedded into pilots tones of the same radio resource blocks, and wherein the UE-selected signature information contains a preamble of UE identity information that is mapped into the pilot tones for eliminating a separate preamble transmission; and receiving an acknowledgment from the serving base station.