Method and apparatus for controlling a publish / subscribe systems

The present invention discloses a control method and apparatus subscription request, it may be used to publish / subscribe engine. The method comprising: parsing the received subscription request for the predicate expressions; determining the subscription request according to the occurrence probability of the occurrence probability of the predicate expression predicate; publish message with a frequency according to the subscription request is associated and the probability of occurrence of the subscription request message increments the estimate will lead to a subscription request; for quality of service control message based on the estimated incremental message. Using the method and apparatus of the embodiments of the present invention, it may be based on the content publish / subscribe engine control quality of service.