scope:

This is a companion specification of TS 103 908 [i.4] for BPSK Narrow Band Power Line Channel for Smart Grid Applications and EN 14908 [1] which defines a representation oriented model of a smart-grid device, and specifies an application level communication protocol on top of EN 14908: the Open Smart Grid Protocol (OSGP). OSGP is designed to support the communication requirements between a large scale deployment of such smart-grid devices and utility supplier or suppliers for the purposes of data collection, primarily for billing purposes by the utility or utilities involved, but including the provision of usage information to the consumer and the control of the consumer's use of utility services in the event of shortage of supply on the part of the utility or transport providers or insufficient payment by the consumer for utility services already supplied.

A typical mass deployment of metering and data collection based on EN 14908 and OSGP will include:

• Data concentrators: servers designed to store the collected data, and optionally to initiate control commands to the smart grid devices.

• Communication proxies: these smart routers form a routing infrastructure for EN 14908 in order to support communications between the Data concentrator and a very large number of smart-grid devices. Typical functions of this layer may include source routing of EN 14908 packets and local management of retransmissions, and offloading the Data concentrator from many networking tasks which would become too resource intensive if implemented in a central node and are now distributed among communication proxies. The communication proxy layer typically also implements route diversity. The layer of communication proxies responsible for direct communication with smart-grid devices consists of nodes called, in the present document, Proxy agents.

• OSGP Smart grid devices. Smart grid devices act as proxy targets, communicating with Proxy agents using OSGP application level messages transported by EN 14908-1 [1], which carry data representations also defined in the present document.

The scope of OSGP is the communication protocol between smart grid devices (proxy targets, which are called "OSGP devices" or simply "devices" in the rest of the present document) and Proxy agents. Any EN 14908 proxy layer architecture may be used with OSGP, as long as the Proxy agents comply with the normative clauses of the present document.

Metrological and EMC considerations are not specified in the present document.