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1. (WO2017033091) ACTIVATION DELAY FOR PUCCH SCELL BASED ON UL RESPONSE

Pub. No.:    WO/2017/033091    International Application No.:    PCT/IB2016/054891
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Aug 16 01:59:59 CEST 2016
IPC: H04W 72/04
H04W 74/00
H04W 74/08
Applicants: NOKIA SOLUTIONS AND NETWORKS OY
Inventors: DALSGAARD, Lars
ZHANG, Li
Title: ACTIVATION DELAY FOR PUCCH SCELL BASED ON UL RESPONSE
Abstract:
This invention relates generally to primary and secondary cells for carrier aggregation and, provides a method, an apparatus, a communication system, a computer program and a computer readable medium storing a computer program related thereto. The method comprises sending from a base station an activation command to a user equipment for activating a secondary cell with a physical uplink control channel for use by the user equipment; sending after an activation delay a physical downlink control channel order message to the user equipment on a physical downlink control channel for the secondary cell; and receiving, responsive to the physical downlink control channel order message, a random access response from the user equipment on the physical uplink control channel for the secondary cell.