分布式光网络中基于osnr感知的光波长路径分配机制

Abstract

An optical signal-to-noise ratio (OSNR) aware lightpath provisioning mechanism (OSNR-LPM) is proposed for distributed optical networks. This OSNR-LPM takes the OSNR value of the lightwave along the lightpath into consideration when establishing the lightpath for the connection request using resource reservation protocol-traffic engineering (RSVP-TE). Moreover, the OSNR-LPM makes full advantages of the OSNR monitoring function in each node and assigns the lightwave by judging the OSNR value carried by the signaling message in order to guarantee the reliable establishment of the lightpath in the data plane. The simulation results show that the OSNR-LPM outperforms other lightpath assignment mechanisms in terms of real blocking probability in the data plane.OCIS codes: 060.4250, 060.4264, 060.4510.

BER-aware-Based Lightpath Setup Approach in GMPLS-controlled Optical Networks

“…Sometimes in lightpath provisioning, it happens that the signaling procedure in GMPLS-based control plane is successful but the lightpath setup fails in the corresponding transport plane, which is called "false success" [2]. One of the main reasons is that only the adequacy of resources (e.g., bandwidth availability and wavelength continuity constraints) is taken into consideration during the signaling procedure, while the high BER value in the transport plane is ignored.…”