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The service registry is a vital component of the service discovery process. It consists of a collection database that stores the service instances.

Figure 2.3 depicts the architecture of service discovery processes for fixed services in the 5G-VANET milieu. The architecture of service discovery processes consists of five components such as human–machine interface display, functional module, context module, non-functional module, and composer. The VANET user enters the request in the human–machine interface display, it’s the functional requirement. The context module gathers the context information from the GPS sensors. The non-functional requirements such as scalability, integrity, cost of service, capacity, security, robustness, and performance are specified by the developers. The composer combines the context information, functional information, and non-functional information and transmits it to the Service Provider (SP). The SP searches for the required resources in the registry and retrieves the optimal services to the VANET users.

Figure 2.3 Service discovery Architecture for 5G-VANET milieu.