A kind of optical burst switching (OBS) ring access control protocol—delay optical burst with a fixed period (DBFP) protocol is proposed, which uses dynamic wavelength add-drop multiplexer (WADM), i.e. uses wavelength tunable transmitters and tunable receivers (TTTR) mechanism. The wavelength resource is reserved by the control packet transmitted in advance. And every optical burst is delayed a fixed period with a fixed length fiber delay line (FDL) at every intermediate node to let all reserved bursts accomplish transmitting, in order to avoid colliding with reserved local access bursts. The result of simulation shows that DBFP protocol can statistically multiplex wavelength efficiently, can allocate wavelengths during in required period on demand, and can reuse wavelength at space domain, and that the wavelength reuse efficiency is up to 160%. Therefore, the proposed DBFP protocol enhances network performance and increases the link utilization, which adapts for bursty traffic, specially. Meanwhile, the delay introduced by DBFP protocol is small, for example, is about 1 ms for optical burst multiplex ring network with 10 nodes. So the delay is neglectable.