However, in case the connection is source bottlenecked or the service is burst, ABR congest control plus open loop control can do a better job than close loop control.

• 但在拥塞发生在信源处或对突发性业务进行控制的情况下 ,添加开环控制的 ABR拥塞控制可以获得比闭环控制更佳的作用。