在基于PCE(路径计算单元)的多域智能光网络中，对各域间有效的资源信息交互对的光路径分配提出了新的挑战，并且光路径的建路仍然存在传统的串行处理方式导致的时延问题。为了更好地应对这一挑战、解决时延问题，文章在PCE技术的基础上，提出一种MDPS(多域并行信令)机制，并提出一种SCE (信令控制单元)，以实现快速的跨域光路分配。该机制充分利用HPCE(层次化PCE)技术，采用“主PCE/多个子PCE”的主从架构，每个子PCE均配备了SCE。通过主PCE与SCE的交互，各域分别独立并行地完成域内信令过程，以实现跨域光路径连接的快速建立。仿真结果表明，所提出的多域光网络快速光路径分配机制能够有效解决上述问题，并能有效提高光路径的分配效率。

In Path Computation Element (PCE)based multidomain intelligent optical networks, lightpath provisioning is a new challenge to the effective resource interaction among various domains and there still exist latency arising from the traditional serial processing in the establishment of the lightpath. In order to better cope with this challenge and solve the problem of latency, this paper proposes a PCEbased MultiDomain Parallel Signaling (MDPS) mechanism and a Signaling Control Element (SCE) so as to realize rapid crossdomain lightpath provisioning. This mechanism fully utilizes the Hierachical PCE (HPCE) technology and adopts the clientserver architecture of one main PCE/multiple subPCEs and each subSCE is equipped with a SCE. On the basis of the interaction between PCE and SCE, every domain independently and parallelly carries out the interdomain signaling process to implement the fast establishment of crossdomain lightpath connection. Simulation results indicate that the proposed mechanism can effectively solve the abovementioned problem and improve the lightpath provisioning efficiency.