Method and arrangement in a telecommunications system

摘要

The present invention relates to a method in a base station (14, 400) and a base station (14, 400) for predicting a frequency dependent Channel State Information, CSI for scheduling and link adaptation of resource blocks of an operating bandwidth, based on frequency band CSI information related to at least one UE, the method comprising the steps receiving a wideband CSI related to UE (step 302), receiving a UE-selected subband CSI for a bandwidth part (step 302), calculating the difference: the UE-selected subband CSI for the bandwidth part minus a non UE-selected SB CSI the wideband CSI (steps 314, 328, 338), and updating a non UE-selected SB CSI for at least the bandwidth part, based on the calculated difference (steps 318, 332, 342). A faster more reliable prediction method based on UE-selected SB CSI values, is hereby achieved.

主权项

1. A method in a base station for predicting a frequency dependent Channel State Information, CSI, value for scheduling and link adaptation of resource blocks of an operating bandwidth comprising a number of bandwidth parts, based on frequency band CSI information related to a user equipment node, UE, the method comprising the steps of:
receiving a first CSI from the UE, wherein the first CSI is a wideband CSI related to the UE, receiving a second CSI from the UE, wherein the second CSI is a UE-selected subband CSI, obtaining a bandwidth part related CSI parameter, determining a third CSI, wherein the third CSI is an estimate of CSI for a non UE-selected subband based on the received first CSI and the obtained bandwidth part related CSI parameter, using the third CSI as a basis for link adaptation for the non UE-selected subband, determining a difference between the second CSI and the third CSI, determining a fourth CSI, wherein the fourth CSI is an updated estimate of CSI for the non UE-selected subband based on said determined difference between the second CSI and the third CSI, and using the fourth CSI, instead of the third CSI, as a basis for link adaptation for the non UE-selected subband.