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各階段允許最小化發送的Service Discovery消息的數量，同時允許在ECU啟動時進行非常快速的同步
• 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沒有請求服務， Service Discovery就不應發送FindService Entry。
• If an OfferService Entry is received during Down Phase,
  如果在Down階段收到OfferService entry，
  • The Service Discovery shall store the state of this Service instance.
    ServiceDiscovery應存儲此Service實例的狀態。
  • A timer shall be set/reset to the TTL value of the received OfferService entry (TTL timer).
    計時器應設置/重置為收到的OfferService條目（TTL計時器）的TTL值。
  • Until the TTL Timer expires or a StopOfferService entry is received, the Service instance is considered Available.
    在TTL計時器到期或收到StopOfferService條目之前，服務實例被視為可用。

• If Sd_ClientServiceSetState() is called with state SD_CLIENT_SERVICE_REQUESTED while being in Down Phase:
  如果在處于Down Phase狀態時調用狀態為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條目或其TTL計時器已到期：
    • The Initial Wait Phase shall be entered,
      應進入初始等待階段，
  • If an OfferService entry was received and its TTL timer did not expire yet:
    如果收到OfferService條目且其TTL計時器尚未到期：
    • If SoAd_OpenSoCon() was not called before, the API SoAd_OpenSoCon() shall be called for all Socket Connections associated with this Client Service Instance.
      如果之前未調用SoAd_OpenSoCon（），則應為與此客戶端服務實例關聯的所有套接字連接調用API SoAd_OpenSoCon（）。
    • The API SoAd_EnableSpecificRouting() shall be called with SdClientServiceActivationRef (see SdConsumedMethods) and the relevant Socket Connections for this Client Service Instance.
      應使用SdClientServiceActivationRef（請參閱SdConsumedMethods）和此客戶端服務實例的相關套接字連接來調用API SoAd_EnableSpecificRouting（）。
    • Open TCP connection if SdClientServiceTcpRef is configured and was not opened before.
      如果配置了SdClientServiceTcpRef并且之前未打開，則打開TCP連接。
    • The Main Phase shall be entered.
      應當進入Main階段。