Patent ID: 9059848
Filing Date: 2015-06-16
Classification: H04L

Abstract:
1. A method in a user equipment for receiving feedback from a base station concerning the reception status of data sent to the base station, the base station and the user equipment are comprised in a wireless communication system adapted for contention based transmissions, the base station is adapted to serve user equipments within a cell of a cellular network, the method comprising the user equipment unit: receiving a contention based grant sent from the base station to the cell of the cellular network, wherein the contention based grant initiates uplink data transfer from at least one user equipment of the plurality of user equipments which is uplink time aligned, sending data to the base station, receiving feedback from the base station on a channel that is transmitted to plural user equipments and wherein whether the feedback is acknowledgment feedback “ACK” or non-acknowledgment feedback “NACK” depends on whether the base station has verified that data has been correctly received from at least one of the plural user equipments, and if an ACK is received, preparing to send new data to the base station, when next grant is received, and if a NACK is received, the method further comprising: