The IEEE Std 1901-2010 is a standard for high speed (up to 500 Mbit/s at the physical layer) communication devices via electric power lines, often called broadband over power lines (BPL). The standard uses transmission frequencies below 100 MHz. This standard is usable by all classes of BPL devices, including BPL devices used for the connection (<1500m to the premise) to Internet access services as well as BPL devices used within buildings for local area networks, smart energy applications, transportation platforms (vehicle), and other data distribution applications (<100m between devices).
The IEEE Std 1901-2010 standard replaced a dozen previous powerline specifications. It includes a mandatory coexistence Inter-System Protocol (ISP). The IEEE 1901 ISP prevents interference when the different BPL implementations are operated within close proximity of one another.
The 1901 standard is mandatory to initiate SAE J1772 electric vehicle charging and the sole powerline protocol for IEEE 1905.1 heterogeneous networking. It was highly recommended in the IEEE P1909.1 smart grid standards because those are primarily for control of AC devices, which by definition always have AC power connections - thus no additional connections are required.
The IEEE P1901 Working Group started in June 2005. More than 90 organizations contributed to the standard. Half of the organizations were from US, a quarter from Japan and the last quarter from Europe.
IEEE 1901 completed a formal standard IEEE Std 1901-2010 published in December 2010. The working group which maintains and extends the standards is sponsored by the IEEE Power Line Communication Standard Committee (PLCSC).
The IEEE 1901 ISP coexistence protocol has been extended to support the International Telecommunication Union's family of home networking standards ITU-G.hn, and adopted by the ITU-T as Recommendation ITU-T G.9972.
The Smart Grid Interoperability Panel (SGIP) initiated by the U.S. National Institute of Standards and Technology (NIST) mandates the implementation of the IEEE 1901 ISP coexistence mechanism (or ITU-T G.9972) in all technologies operating over power lines. NISTIR 7862: Guideline for the Implementation of Coexistence for Broadband Power Line Communication Standards  The IEEE 1901 standard is included in the SGIP Catalog of 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 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 1901 is the PLC standard supported by the IEEE 1905.1 Standard for a Convergent Digital Home Network
The 1901 standards include two different physical layers, one based on 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.
The fast Fourier transform (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 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.
Related PLC 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.
"IEEE 1675". is another IEEE standard related to Broadband over Power Line. P1675 provides testing and verification standards for the hardware commonly used for Broadband over Power Line (BPL) installations (primarily couplers and enclosures) and provides standard installation methods to ensure compliance with applicable codes and standards.
"IEEE 1775".: Power Line Communication EMC Working Group.
"IEEE 1905.1".: Standard for a Convergent Digital Home Network for Heterogeneous Technologies
Other IEEE pending standards sponsored by the "PLCSC".:
"IEEE P1901.2".: Standard for Low Frequency (less than 500 kHz) Narrow Band Power Line Communications for Smart Grid Applications
"IEEE P1909.1".: Recommended Practice for Smart Grid Communication Equipment -Test methods and installation requirements
The HD-PLC Alliance provides certification. Panasonic is a member of the HD-PLC Alliance, and licenses its patents and technologies that support IEEE 1901. K-Micro (also a member) announced a product in 2011. The Qualcomm Hy-Fi networking marketing program combines IEEE 1901 (on AC outlets in every room) with IEEE 802.11ad branded as Wi-Fi (which does not penetrate walls).
- IEEE (1 February 2011). "IEEE Standard Association Press Release". Official web site.
- Jean-Philippe Faure (May 2011). "The Realities of IEEE 1901's Ratification". IEEE Smart Grid.
- Jean-Philippe Faure (December 2011). "Power Line Communication Standard Committee". Official web site (IEEE Communication Society). Retrieved 6 November 2013.
- ITU-T (June 2010). "G.9972 : Coexistence mechanism for wireline home networking transceivers". Official web site.
- NIST SGIP (1 June 2012). "NISTIR 7862". Official web site.
- NIST SGIP (31 January 2013). "SGIP Catalog of Standards". Official web site.
- DLNA (May 2011). "DLNA® Approves HomePlug AV and HD-PLC Powerline Networking for Increased Digital Home Connectivity". Business Wire.
- Pokrzywa, Jack; Reidy, Mary (2011-08-12). "SAE's J1772 'combo connector' for ac and dc charging advances with IEEE's help". SAE International. Retrieved 2011-08-12.
- "HD-PLC Alliance products". Official web site. December 2012.
- Stefano Galli, O. Logvinov (July 2008). "Recent Developments in the Standardization of Power Line Communications within the IEEE". IEEE Communications Magazine 46 (7): 64–71. doi:10.1109/MCOM.2008.4557044. An overview of P1901 PHY/MAC proposal.
- S. Goldfisher, S. Tanabe, “IEEE 1901 access system: An overview of its uniqueness and motivation”, IEEE Commun. Mag., vol. 48, no. 10, October 2010, pp. 150–157.
- IEEE-SA (18 June 2009). "IEEE Broadband Over Power Lines Working Group Approves Provisions for MAC/PHY and Inter-System Protocol".
- "G.9972 : Coexistence mechanism for wireline home networking transceivers". ITU-T. November 2011.
- "HD-PLC Alliance".
- Panasonic (7 June 2010). "Panasonic Begins Licensing 'HD-PLC' Patents and Technologies". Official web site.
- HD-PLC Alliance (25 July 2011). "The World First IEEE 1901 full compliant LSI is Ready for Stamping HD-PLC logo".
- Ray Willington (20 April 2010). "HomePlug Powerline Alliances Gets IEEE Backing: Standard To Come Soon - HotHardware". HotHardware - we site. Retrieved 23 July 2011.
- "HD-PLC (High Definition Power Line Communication)". Official web site. HD-PLC Alliance. Retrieved 21 July 2011.
- "Major Features Approved for Broadband over Powerline Spec". Cabling Installation & Maintenance. 16 July 2010. Retrieved 23 July 2011.
- Frederic Onado (June 2010). "Hometoys Interview With Frederic Onado Is COO of SPiDCOM About IEEE 1901". HomeToys Home Technology eMagazine. Retrieved 23 July 2011.