IEEE Std 1900.6a-2014 pdf download – IEEE Standard for Spectrum Sensing Interfaces and Data Structures for Dynamic Spectrum Access and Other Advanced Radio Communication Systems Amendment 1 : Procedures, Protocols, and Data Archive Enhanced Interfaces.
3. Definitions, acronyms, and abbreviations 3.1 Definitions Insert the following definitions in lexical order: gateway: A network entity (software or hardware) that interfaces between networks that use different protocols, or are of different, potentially incompatible, technology. NOTE―A gateway may operate with a focus on network translation (network gateway) or service translation (service gateway). gateway function: A specific function that realizes a gateway. See also: gateway. NOTE―The term often denotes a gateway (hardware or software) that is embedded into another (larger) function or entity such as a service, service node, or server software. legacy subsystem: A non-compliant distributed sensing subsystem that exclusively facilitates legacy sensors. proxy: A server that acts as an intermediary for requests from clients seeking resources from other servers. NOTE―Client, server, and proxy usually share the same protocols and networking technology. A proxy may be transparent (i.e., clients are aware that they are communicating with a server through a proxy) or may hide servers behind (i.e., clients are not aware that they do not communicate directly with a server).4. System model Insert the following subclause: 4.4 Scenario 4: Single CE/DA, multiple sensors that may act as a gateway to non-compliant subsystems In this scenario as shown in Figure 3a, multiple sensors provide sensing-related information to a CE/DA. One or more sensors may act as a gateway relaying sensing-related information between a 1900.6 compliant system and a non-compliant subsystem. A sensor acting as a gateway is referred to as a proxy sensor since it represents a non-compliant subsystem toward the 1900.6-compliant system as one or more 1900.6-compliant sensors without implying any assumption on the technology used within the non- compliant subsystem. Since the proxy sensor hides the existence of the non-compliant subsystem, this scenario is identical to the “1:N scenario” as illustrated in 4.2 with respect to the IEEE 1900.6 interfaces. A proxy sensor interworks with a non-compliant subsystem based on interfaces outside this standard. It shall provide at least one of the following interworking options:  The proxy sensor may provide transparent access for its clients towards legacy sensors provided by the non-compliant subsystem. NOTE―In case a proxy sensor interworks with multiple legacy sensors simultaneously, it may reflect sensing information from individual legacy sensors by representing multiple sensor instantiations toward its clients.