SOME/IP-SD-Timings and repetitions for Client Service and Consumed Eventgroups

Timings and repetitions for Client Service and Consumed Eventgroups

• The Service Discovery phases allow minimizing the number of Service Discovery messages sent while allowing for very fast synchronization upon ECU start.
  Service Discovery各阶段允许最小化发送的Service Discovery消息的数量，同时允许在ECU启动时进行非常快速的同步
• This de-emphasis is realized by the following Phases:
  • Down
  • Requested
    • Initial Wait Phase
    • Repetition Phase
    • Main Phase

Down Phase for Client Services

• As long as a service is not requested by the BswM, the Service Discovery shall not send FindService Entry entries.
  只要BswM没有请求服务， Service Discovery就不应发送FindService Entry。
• If an OfferService Entry is received during Down Phase,
  如果在Down阶段收到OfferService entry，
  • The Service Discovery shall store the state of this Service instance.
    ServiceDiscovery应存储此Service实例的状态。
  • A timer shall be set/reset to the TTL value of the received OfferService entry (TTL timer).
    计时器应设置/重置为收到的OfferService条目（TTL计时器）的TTL值。
  • Until the TTL Timer expires or a StopOfferService entry is received, the Service instance is considered Available.
    在TTL计时器到期或收到StopOfferService条目之前，服务实例被视为可用。

• If Sd_ClientServiceSetState() is called with state SD_CLIENT_SERVICE_REQUESTED while being in Down Phase:
  如果在处于Down Phase状态时调用状态为SD_CLIENT_SERVICE_REQUESTED的API Sd_ClientServiceSetState（）：
  • If no OfferService entry was received before or its TTL timer expired already:
    如果之前未收到OfferService条目或其TTL计时器已到期：
    • The Initial Wait Phase shall be entered,
      应进入初始等待阶段，
  • If an OfferService entry was received and its TTL timer did not expire yet:
    如果收到OfferService条目且其TTL计时器尚未到期：
    • If SoAd_OpenSoCon() was not called before, the API SoAd_OpenSoCon() shall be called for all Socket Connections associated with this Client Service Instance.
      如果之前未调用SoAd_OpenSoCon（），则应为与此客户端服务实例关联的所有套接字连接调用API SoAd_OpenSoCon（）。
    • The API SoAd_EnableSpecificRouting() shall be called with SdClientServiceActivationRef (see SdConsumedMethods) and the relevant Socket Connections for this Client Service Instance.
      应使用SdClientServiceActivationRef（请参阅SdConsumedMethods）和此客户端服务实例的相关套接字连接来调用API SoAd_EnableSpecificRouting（）。
    • Open TCP connection if SdClientServiceTcpRef is configured and was not opened before.
      如果配置了SdClientServiceTcpRef并且之前未打开，则打开TCP连接。
    • The Main Phase shall be entered.
      应当进入Main阶段。