Living Network Alliance (DLNA) announced it supported IEEE 1901 standards. SAE and IEC 62196 The SAE J1772 and IEC 62196 standards for electric vehicle charging include IEEE 1901 as the standard for power line communication between the vehicle, off-board DC charging station, and the smart grid, without requiring an additional pin; SAE International and the IEEE Standards Association are sharing their draft standards related to the smart grid and vehicle electrification. IEEE 1905.1 IEEE 1901 is the powerline communication standard supported by the IEEE 1905.1 Standard for a Convergent Digital Home Network. Description The 1901 standards include two different physical layers (PHY), one based on fast Fourier transform (FFT) orthogonal frequency-division multiplexing (OFDM) modulation and another based on wavelet OFDM modulation. Each PHY is optional, and implementers of the specification may, but are not required to, include both. The FFT PHY is derived from HomePlug AV technology and is deployed in HomePlug-based products. The Wavelet PHY is derived from HD-PLC technology and is deployed in HD-PLC-based products. It goes up to 1024-QAM. The FFT PHY includes a forward error correction (FEC) scheme based on convolutional turbo code (CTC). The second option "Wavelet PHY" includes a mandatory FEC based on concatenated Reed–Solomon (RS) and convolutional code, and an option to use low-density parity-check (LDPC) code. On top of these two physical layers, two different Media Access Control (MAC) layers were defined; one for in-home networking and the other for Internet access. Two MACs were needed because each application has different requirements. To manage coexistence between PHYs and MACs the Inter-System Protocol (ISP) was developed. ISP enables various BPL devices and systems to share communication resources (frequency/time) when installed in a network with common electrical wiring. ISP allows 1901-compliant devices and ITU-T G.hn- compliant devices to co-exist. The protocol provides configurable frequency division for access and time division for in-home with a granularity compatible with the quality of service (QoS) requirements of the most demanding audio and video applications. An amendment in 2019, IEEE 1901a-2019, defines a more flexible way of separating wavelet OFDM channels for Internet of Things applications. Related standards Another trade group called the HomeGrid Forum was formed in 2008 to promote the ITU-T home networking standards known as G.hn. Recommendation ITU-T G.9972 approved in June 2010, specifies a coexistence mechanism for home networking transceivers capable of operating over powerline wiring. This recommendation is based on IEEE 1901 ISP.