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IEEE 1905.1 is an IEEE standard which defines a network enabler for home networking supporting both wireless and wireline technologies: IEEE 802.11 (marketed under the Wi-Fi trademark), IEEE 1901 (HomePlug, HD-PLC) powerline networking, IEEE 802.3 Ethernet and Multimedia over Coax (MoCA).
The IEEE P1905.1 working group had its first meeting in December 2010 to begin development of convergence digital home network specifications. Around 30 organizations participated in the group and achieved approval of the draft P1905.1 standard in January 2013 with final approval and publication by IEEE-SA in April 2013.
The IEEE 1905.1 Standard Working Group is sponsored by the IEEE Power Line Communication Standards Committee (PLCSC).
nVoy  officially certifies products as 1905.1-compliant and is intended to become the dominant brand name and identity for all 1905.1 devices. Not to be confused with the Pogo device of the same name nor various networked devices named Envoy, e.g. from ASUS and others. Major chip vendors (notably Qualcomm  and Broadcom ) endorsed the certification regime. Consumer-level lists of features and benefits of IEEE 1905 are also the responsibility of nVoy certifiers. .
The benefits of 1905.1 technology include simple setup, configuration and operation of home networking devices using heterogeneous technologies. Leveraging the performance, coverage and mobility benefits of multiple interfaces (Ethernet, Wi-Fi, Powerline and MoCA) enables better coverage and throughput in every room for both mobile and fixed devices.
Standardizing the use of multiple networking technologies to transmit data to a single device in a transparent manner enables powerful use cases in home networks:
Service providers seek to address growth in network traffic resulting from more devices in more rooms and high-bandwidth latency-straining trends such as IPTV, Video on demand, multi-room DVR and device to device media shifting. 1905.1 upgrades the network to a backbone to improve existing deployments (for instance, ending streaming delays from in-home devices) and enabling new whole-home products and services. Some example features/benefits include:
Integration of wired and wireless products enables consumers to easily self-install networking equipment capable of significantly improving capacity and coverage in their home network which improves end user satisfaction and reduces product returns. Some specific benefits of 1905.1 networking to the retailer and end user include:
1905.1 devices run an abstraction layer (AL) hiding the diversity of media access control technologies. This sub-layer exchanges Control Message Data Unit (CMDU) with 1905.1 neighbors. The CMDUs are communicated directly over Layer 2 of the different supported technologies without the need to have an IP stack. The standard does not require any changes to the specifications of the underlying technologies.
This abstraction layer provides a unique EUI-48 address to identify a 1905.1 device. This unique address is useful to keep a persistent address when multiple interfaces are available and facilitate seamless switching of traffic between interfaces. The standard does not define loop prevention and forwarding protocol. A 1905.1 device is compatible with existing IEEE 802.1 bridging protocols.
The management of a 1905.1 device is simplified by the use of a unified Abstraction Layer Management Entity (ALME) and with the use of a data model accessible with CWMP (Broadband Forum TR-069)
The architecture designed for the abstraction layer is based on two 1905.1 service access points accessible to upper layers: a 1905.1 MAC SAP and a 1905.1 ALME SAP.
The ALME is a unique management entity supporting different media dependent management entities and a flow-based forwarding table. A 1905.1 protocol is used between ALMEs to distribute different type of management information such as: topology and link metrics.
1905.1 Control Message Data Unit frame consists of an 8 octets header and a variable length list of TLVs (type-length-value) data elements which is easily extendable for future use. The generic CMDU frame format has the following structure
|Message version||Reserved||Message Type||Message ID||Fragment ID||Last Fragment Indicator||Relay Indicator||Reserved||List of TLV|
|1 octet||1 octet||2 octets||2 octets||1 octet||1 bit||1 bit||6 bits||variable length|
Vendor specific CMDU are supported via Message Type 0x0004. Each TLV has the following basic structure:
|1 octet||2 octets||variable length|
Vendor specific TLV are supported via TLV Type 11. The EtherType value assigned to 1905.1 CMDU is 0x893a.
The list of 1905.1 features is listed below.
1905.1 provides a tool to get a global view of the network topology regardless of the technologies running in the home/office network.
The Abstraction Layer generates different topology messages to build this protocol's topology:
The Group Address used for Discovery and Notification messages is 01:80:c2:00:00:13.
To detect a non-1905.1 bridge connected between two 1905.1 devices, the Abstraction Layer also generates a LLDP message with the nearest bridge address (01:80:c2:00:00:0e) that is not propagated by 802.1D bridges.
Topology information collected by a 1905.1 device are stored in a data model accessible remotely via TR-069 protocol.
The 1905.1 ALME provides a mechanism to obtain a list of metrics for links connecting two 1905.1 devices:
A 1905.1 device can also request Link Metrics from another 1905.1 device by generating a Link Metric Query message (Message type 0x0005). The requested device will respond with a Link Metric Response message (Message type 0x0006).
The 1905 ALME provides a list of primitives to manage forwarding rules per flow (Get, Set, Modify and Remove). This feature may be used to distribute dynamically the different flows over the different technologies. To classify the flows, a set or subset of the following elements can be used:
When setting a forwarding rule for a unicast destination, only one outgoing interface may be specified.
The goal of 1905.1 security setup is to allow a new 1905.1 device to join the network with a unified security procedure even if the device has multiple interfaces running different encryption methods. Three unified security setup procedures are defined:
The Push Button method requires the user to press one button on a new (i.e. not in-network) 1905.1 device and one button on any 1905.1 device already in the network. It is not necessary for the user to know which technology is used by the new device to join the network, and which device will process the pairing and admission of this new device into the network. Two 1905.1 messages are used for the push button method:
These messages are sent to all 1905.1 devices in the network.
If the User Configured Passphrase/Key is used, the user needs to type/remember only one sequence of US-ASCII characters (between 8 and 63) and the ALME will derive different security passwords for the different technologies through SHA-256 function.
If the NFC network Key is used, the user needs to touch the new 1905.1 device with an NFC equipped smartphone already member of the 1905.1 network.
This feature is used to exchange Wi-Fi Simple Configuration messages over an authenticated 1905.1 link. Using this protocol a 1905.1 AP Enrollee can retrieve configuration parameters (like SSID) from a 1905.1 AP Registrar. Thus AP Auto-Configuration is used to simplify the setup of a home network consisting of multiple APs – eliminating the need for the user to manually configure each AP (only a single configuration, of the AP Registrar, is required).
A specific 1905.1 CMDU frame (Message type 0x0009) is used to transport WPS messages. If an AP Enrollee is dual-band (2.4 GHz and 5Ghz) capable, the auto-configuration procedure may be executed twice.
The consumer certification program named nVoy was announced in June 2013 and first certified chips that " support the new nVoy HomePlug Certification for IEEE 1905.1 compliance" were announced at that time . Consumer-level products were expected by year-end 2013. but were delayed until 2014 consumer shows - as of December 2013 there were no nVoy-certified consumer products; small-network-focused review sites had no products to review. 
Broadcom BCM60500 and BCM60333 SoC  are claimed (by the vendor) to be nVoy/1905-compliant. Compatible line drivers were available, e.g. from Microsemi . Qualcomm Atheros  offers a variety of Hy-Fi reference designs based on various combinations of Qualcomm VIVE™ 11ac and Qualcomm XSPAN™ 11n wireless LAN, Qualcomm AMP™ powerline and Ethernet technologies. MStar Semiconductor indicated  its support of nVoy/1905 in its Homeplug AV powerline communication solutions.