Multiple Service-Instances多个服务实例
- Service-Instances of the same Service are identified through different Instance IDs. It shall be supported that multiple Service-Instances reside on different ECUs as well as multiple Service-Instances of one or more Services reside on one single ECU.
同一服务的多个服务实例通过不同的Instance ID来识别。应支持多个服务实例驻留在不同的ECU上，以及一个或多个服务的多个服务实例驻留在一个ECU上。 - While different Services shall be able to share the same port number of the transport layer protocol used, multiple Service-Instances of the same service on one single ECU shall listen on different ports per Service-Instance.
虽然不同的服务应能够共享所使用的传输层协议的相同端口号，但是在一个ECU上的同一服务的多个服务实例应在每个服务实例的不同端口上进行侦听。 - Rationale合理性:
While Instance IDs are used for Service Discovery, they are not contained in the SOME/IP header.
虽然 Instance ID用于服务发现，但它们不包含在SOME / IP header中。 - A Service Instance can be identified through the combination of the Service ID combined with the socket (i.e. IP-address, transport protocol (UDP/TCP), and port number). It is recommended that instances use the same port number for UDP and TCP. If a service instance uses UDP port x, only this instance of the service and not another instance of the same service should use exactly TCP port x for its services.
可以通过 Service ID与套接字的组合（即IP地址，传输协议（UDP / TCP）和端口号）来识别服务实例。建议实例对UDP和TCP使用相同的端口号。如果服务实例使用UDP端口x，则只有该服务实例而不是同一服务的另一个实例应该使用TCP端口x作为其服务。