Method and apparatus for downlink power allocation for 16 QAM modulation scheme in NB-IoT system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsLiping Zhang, Gerardo Agni Medina Acosta, Jie Chen, Emre Yavuz, Ritesh Shreevastav
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Abstract
Various embodiments of the present disclosure provide methods and apparatuses for 16 Quadrature Amplitude Modulation (QAM) modulation scheme in a Narrowband Internet of Things (NB-IoT) system. The method implemented at a network node in the NB-IoT system includes transmitting downlink power allocation for 16 QAM modulation scheme to a terminal device in the NB-IoT system, wherein the downlink power allocation indicates data-to-pilot power ratio information to be used for determining Narrowband Physical Downlink Shared Channel (NPDSCH) energy per resource element (EPRE).
Claims16
A method implemented at a network node in a Narrowband Internet of Thing, NB-IoT, system, comprising:
- transmitting downlink power allocation for 16-Quadrature Amplitude Modulation, 16-QAM, modulation scheme to a terminal device in the NB-IoT system, the downlink power allocation indicating data-to-pilot power ratio information to be used for determining Narrowband Physical Downlink Shared Channel, NPDSCH, energy per resource element, EPRE, the data-to-pilot power ratio information comprising a first and a second configured parameter, the first configured parameter comprising a first data-to-pilot power ratio and the second configured parameter comprising a second data-to-pilot power ratio, the NPDSCH EPRE being determined under an assumption that a ratio of NPDSCH EPRE between NPDSCH symbols without a narrowband reference signal, NRS, and without a channel reference signal, CRS, and NPDSCH symbols without a NRS and with a CRS is zero dB.
A network node in a Narrowband Internet of Thing, NB-IoT, system comprising:
- one or more processors;
- and
- one or more memories comprising computer program codes,
- the one or more memories and the computer program codes configured to, with the one or more processors, cause the network node to:
- transmit downlink power allocation for 16-Quadrature Amplitude Modulation, 16-QAM, modulation scheme to a terminal device in the NB-IoT system, the downlink power allocation indicating data-to-pilot power ratio information to be used for determining Narrowband Physical Downlink Shared Channel, NPDSCH, energy per resource element, EPRE, the data-to-pilot power ratio information comprising a first and a second configured parameter, the first configured parameter comprising a first data-to-pilot power ratio and the second configured parameter comprising a second data-to-pilot power ratio, the NPDSCH EPRE being determined under an assumption that a ratio of NPDSCH EPRE between NPDSCH symbols without a narrowband reference signal, NRS, and without a channel reference signal, CRS, and NPDSCH symbols without a NRS and with a CRS is zero dB.
A terminal device in a Narrowband Internet of Thing, NB-IoT, system comprising:
- one or more processors;
- and
- one or more memories comprising computer program codes,
- the one or more memories and the computer program codes configured to, with the one or more processors, cause the terminal device to:
- receive downlink power allocation for 16-Quadrature Amplitude Modulation, 16-QAM, modulation scheme from a network node in the NB-IoT system, the downlink power allocation indicating data-to-pilot power ratio information to be used for determining Narrowband Physical Downlink Shared Channel, NPDSCH, energy per resource element, EPRE, the data-to-pilot power ratio information comprising a first and a second configured parameter, the first configured parameter comprising a first data-to-pilot power ratio and the second configured parameter comprising a second data-to-pilot power ratio, the NPDSCH EPRE being determined under an assumption that a ratio of NPDSCH EPRE between NPDSCH symbols without a narrowband reference signal, NRS, and without a channel reference signal, CRS, and NPDSCH symbols without a NRS and with a CRS is zero dB;
- and
- obtain the NPDSCH EPRE determined at least partly based on the data-to-pilot power ratio information.
A method implemented at a terminal device in a Narrowband Internet of Thing, NB-IoT, system, the method comprising:
- receiving downlink power allocation for 16-Quadrature Amplitude Modulation, 16-QAM, modulation scheme from a network node in the NB-IoT system, the downlink power allocation indicating data-to-pilot power ratio information to be used for determining Narrowband Physical Downlink Shared Channel, NPDSCH, energy per resource element, EPRE, the data-to-pilot power ratio information comprising a first and a second configured parameter, the first configured parameter comprising a first data-to-pilot power ratio and the second configured parameter comprising a second data-to-pilot power ratio, the NPDSCH EPRE being determined under an assumption that a ratio of NPDSCH EPRE between NPDSCH symbols without a narrowband reference signal, NRS, and without a channel reference signal, CRS, and NPDSCH symbols without a NRS and with a CRS is zero dB;
- and
- obtaining the NPDSCH EPRE determined at least partly based on the data-to-pilot power ratio information.
Dependencies are inferred from the claim text.