Modulation and coding scheme selection for link adaptation

摘要

There is provided a method of operating a mobile device that is configured to receive multi-antenna downlink transmissions from a network node, the mobile device being configured to perform link adaptation to select a suitable modulation and/or coding scheme, MCS, from a plurality of available modulation and/or coding schemes, MCSs, for the multi-antenna downlink transmission, the method comprising (i) determining whether to use an unrestricted set of MCSs or a restricted set of MCSs when performing link adaptation for the multi-antenna downlink transmission, the unrestricted set of MCSs comprising all of the plurality of available MCSs, the restricted set comprising a subset of the plurality of available MCSs; and (ii) performing the link adaptation to select the MCS for the multi-antenna downlink transmission using the unrestricted or restricted set of MCSs determined in step (i).

主权项

1. A method of operating a mobile device that is configured to receive a multi-antenna downlink transmission from a network node of a mobile communication network, the mobile device being configured to perform link adaptation to select a suitable Modulation and Coding Scheme (MCS) from a plurality of available MCSs for the multi-antenna downlink transmission, the method comprising:
determining whether to use an unrestricted set of MCSs or a restricted set of MCSs, the unrestricted set of MCSs comprising all of the plurality of available MCSs, the restricted set comprising a subset of the plurality of available MCSs, wherein said step of determining comprises:
determining whether the mobile communication network is sending dedicated pilots or reference signals to the mobile device for demodulation;in the event that dedicated pilots or reference signals are being transmitted, determining whether the dedicated pilots or reference signals are being transmitted with restrictions;in the event that the dedicated pilots or reference signals are not being transmitted with restrictions, determining that the unrestricted set of MCSs is to be used; andotherwise determining that the restricted set of MCSs is to be used; and using, according to said step of determining, either the restricted set of MCSs or the unrestricted set of MCs to select the MCS to be used for performing link adaptation for the multi-antenna downlink transmission.