| 摘要 |
<p>The invention provides a method which achieves reduction of virtual channel connection delay time involved in signaling without using virtual channels as permanent virtual channels (PVC) and without performing wasteful allocation of a signal bandwidth and of a signaling system. In the signaling system, when transmission terminal 100 transmits a packet, packet transmission control section 110 delivers a request for transmission of a packet to signaling transmission section 101. Upon reception of the request, signaling transmission section 101 searches VC and signal bandwidth table 102 and sends out, when a virtual channel is registered and a necessary signal bandwidth is held, a packet using the virtual channel, but requests, when a virtual channel is registered but the signal bandwidth is short, a packet switching system only for a signal bandwidth and then sends out the packet by way of the virtual channel. On the other hand, when no virtual channel is registered; signaling transmission section 101 delivers signaling to request transmission of the next packet to the packet switching system. Table 102 includes, for each destination address, virtual channel timer 112 for release the virtual channel applied thereto after the virtual channel is held for a predetermined period of time after it becomes free, and bandwidth timer 111 for reducing the signal bandwidth after each predetermined interval of time after the virtual channel becomes free. Each end of a packet transmission, the two timers are reset to clock.</p> |
