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1. (WO2017151024) NETWORK NODE AND METHOD FOR MANAGING LINK ADAPTION

Pub. No.:    WO/2017/151024    International Application No.:    PCT/SE2016/050162
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Thu Mar 03 00:59:59 CET 2016
IPC: H04L 1/00
H04L 1/16
H04L 5/00
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: RASK, Patrik
Title: NETWORK NODE AND METHOD FOR MANAGING LINK ADAPTION
Abstract:
A method performed by a network node (120), for managing Link Adaption (LA) for a UE (120) connected to the network node (110). A CQI comprising a measured SINR based on CRS has been reported to the network node by the UE (120). The network node (110) sends a transmission to the UE using a MCS, which is determined based on an estimated SINR comprising the measured SINR reported by the UE (120) and a first offset stored for a previous UE session. The network node (110) receives a confirmation message from the UE (120), comprising an ACK or NACK of receipt of the transmission. The network node (110) adjusts the estimated SINR based on the received ACK or NACK. The network node (110) determines a new MCS based on the adjusted estimated SINR value. The network node (110) sends a new transmission to the UE (120) using the determined new MCS. At the end of the UE session the network node (110) determines a second offset between an end value of the adjusted estimated SINR and the measured SINR value reported by the UE (120). The network node (110) then stores the determined second offset between the end value of the adjusted SINR and the SINR value reported by the UE (120).