| 摘要 |
<p>The invention relates to a method of processing such a short message arriving at a mobile switching centre of a cellular radio network which arrives at the same time as a preceding short message is being sent from the mobile switching centre ot a B-subscriber. In addition, the invention relates to a mobile switching centre of a cellular radio system implementing the method. When a short message (SM n) addressed to a B-subscriber (MS) arrives at a mobile switching centre (MSC) at the same time as previously arrived short messages (SM n-1...) are being sent to the B-subscriber, then the exchange (MSC) stores the newest short message in a queue. A problem arises when the total delay of the queue is longer than the maximum time, defined by time supervision, used on a connection between the exchange (MSC) and a service centre (SC). To avoid exceeding the time supervision, the total delay of an incoming short message is estimated, the total delay comprising a queuing time resulting from the preceding short messages and the actual transmission time of said short message. If the total delay is longer than the maximum time, the incoming short message is not stored in a queue, but a negative acknowledgement is sent to the service centre (SC), on account of which it will send the short message again after a certain time.</p> |
