## 2 Use Case (UC) Description, IOP Methodology and Concept Applied
### BAP and BAIOP Creation  
The profiling has two steps, the Basic Application Profile(s), BAP, and the Basic Application Interoperability Profile(s), BAIOP, creation. The former one(s) are based on the information flows between the different actors. Therefore, it is crucial to determine the standards and protocols that can be used for each link of interaction for the information exchange. Another important factor is that the BAPS cannot have multiple options; thus, each BAP means that only one protocol/standard/option of a standard can be used. For the BAIOP(s), one BAP is considered for each interaction link between actors. When dealing with the profiling, only one equipment is considered to be the equipment under test, whereas the rest are considered to be part of the testbed; thus, their interactions and the standards used in each interaction are fixed. The BAP and BAIOP profiling procedure is explained in detail in [18]. Here we only list the features necessary for our use case. For the described use case, we consider that the equipment under test is a smart meter and its integration to the rest of the system needs to be tested under stress conditions or not. It is also assumed that the LNAP is integrated within the smart meter and that the functions over interface M and H2 (Figure 4) remain the same. Therefore, the interaction  
Figure 4: Use Case representation of the communication and information layer. Figure 3: Use Case representation on the component layer. link of interest is interface C between the LNAP and NNAP. In this section, non-stress conditions are considered. The interoperability layers of interest are the component, the communication and the information since we are interested in the technical part of the interoperability test. The business layer is mostly linked to market issues, which is outside the scope of this work. In this simple use case, the only interaction link of interest is between the smart meter and the data concentrator (between the LNAP and NNAP). Thus, BAP and BAIOP creation becomes simpler. Table 1 shows the possible BAPs for the equipment under test (smart meter). For the extraction of the possible standards, [13; 14; 15] have been used. The BAIOP(s) determine how the tests should be carried out and defines the test case(s), which can be more than one. For this use case, we will have two BAIOPs, one for the communication and one for the information layer. Each of them will depend on the smart meter's specifications. At this stage, it should be determined whether or not the equipment is interoperable or not under non-stress working conditions. Given the smart meters that are available in our lab, it is defined that the I1a and the C1b BAPs are used for the two layers of interest since the smart meters work with the PoweRline Intelligent Metering Evolution (PRIME) specification. We consider that the physical connection of the smart meter is accomplished without problems, in other words, that there are no compatibility problems with respect to the cabling and voltage/current limits between the smart meter and the grid. Tables 2 and 3 describe the interoperability tests for the communication and information layer under non-stress conditions, based on [18].