Optical burst switching (OBS) is proposed as a high speed, flexible and transparent switching technology. It
facilitates the efficient integration of both IP and WDM. And it provides statistical multiplexing gains and avoids
long end to end setup time of traditional virtual circuit configuration. However, under the current and foreseeable
limitations of optical technology, performance of OBS networks is mainly hampered at the network nodes by
resource contention. Due to the fact that the random access memory is not available in the optical domain, there
exists a real possibility that bursts may contend with one another at a switching node. Therefore, many contention
resolutions are proposed, such as fiber delay lines, wavelength conversion, and deflection routing, etc. These
resolutions are focus on the node design. They are increase the complexity of the node. But they can not always
take some significant effect and make notable gains in cost-efficiency. In this paper, unlike these schemes are focus
on the node design, we proposed a novel link architecture named dual-fiber-link (DFL) for OBS networks. We also
proposed a relative media access control protocol. We have developed some scenarios to evaluate this architecture.
Simulation results show that the proposed link can decrease packet drop probability in terms of orders of
magnitude in OBS networks without optical buffers and wavelength conversions.