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1. (WO2018084775) A NETWORK NODE AND A WIRELESS COMMUNICATION DEVICE FOR RANDOM ACCESS IN BEAM-BASED SYSTEMS

Pub. No.:    WO/2018/084775    International Application No.:    PCT/SE2017/051061
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Tue Oct 31 00:59:59 CET 2017
IPC: H04W 74/08
H04W 16/28
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: WIBERG, Niclas
ANDERSSON, Håkan
ZHANG, Qiang
FURUSKOG, Johan
Title: A NETWORK NODE AND A WIRELESS COMMUNICATION DEVICE FOR RANDOM ACCESS IN BEAM-BASED SYSTEMS
Abstract:
Embodiments herein relate to a method performed by a wireless communication device 615, for performing random access. The wireless communication device 615 is configured with a first Random-Access (RA) configuration. The method comprises obtaining an indication of a failure of a beam-tracking process. The method further comprises adapting the RA configuration of the wireless communication device 615 based on the obtained indication, wherein the adapting comprises switching from the first RA configuration to a second RA configuration having more frequently occurring RA resources than the first RA configuration. The method further comprises transmitting, to a network node 611, 612, a RA message using a RA resource, which RA resource is based on the adapted RA configuration. Embodiments herein further relate to a method performed by a serving network node 61 1, as well as a wireless communication device 615 and a serving network node 611 for performing the methods.