US Patent No. 10,716,116

METHOD AND DEVICE FOR DETERMINING A NUMBER OF MIMO LAYERS


Patent No. 10,716,116
Issue Date July 14, 2020
Title Method And Device For Determining A Number Of Mimo Layers
Inventorship Dirk Gerstenberger, Stockholm (SE)
Daniel Larsson, Solna (SE)
Kai-Erik Sunell, Bromma (SE)
Henning Wiemann, Aachen (DE)
Assignee Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)

Claim of US Patent No. 10,716,116

1. A method in a base station for communicating with a user equipment in the communication network, the user equipment capable of operating according to at least two user equipment categories, the base station being configured to communicate with the user equipment according to a user equipment category selected from the at least two user equipment categories, the method comprising:receiving, from the user equipment, information about the at least two user equipment categories and at least a first number of maximum downlink (DL) multiple input multiple output (MIMO) transmission layers associated to a first user equipment category, wherein at least a second number of maximum DL MIMO transmission layers is associated with a second user equipment category;
determining, based on the first number of maximum DL MIMO transmission layers associated with the first user equipment category, the second number of maximum DL MIMO transmission layers associated with the second user equipment category, and a number of DL MIMO transmission layers supported by the base station, a supported number of maximum DL MIMO transmission layers corresponding to the first user equipment category, when the base station supports the first user equipment category, and wherein the supported number of maximum DL MIMO transmission layers is not larger than the first number of maximum DL MIMO transmission layers received from the user equipment and greater than or equal to the second number of maximum DL MIMO transmission layers; and
transmitting, to the user equipment via a radio resource control (RRC) protocol, an indication of the supported number of maximum DL MIMO transmission layers.