Hybrid immediate request (IR) and advanced reservation (AR) is an inevitable traffic model for future SDM-EONs to accommodate uncertainty and abundance of services. Different from the traditional IR handling instant services like chat messaging, AR can balance the traffic load by postponing allocation to delay-tolerant requests such as cloud computing, e-science, IPTV etc. Although IR/AR mixed traffics are essential in future SDM-EONs, several problems arise especially when solving dynamic RSCA problems. Most importantly, inter-core crosstalk (XT) and resource fairness need to be considered to satisfy high-quality transmission and to avoid unnecessary resource occupation of formerly arriving AR requests.

We propose a dynamic HTA-RSCA algorithm that combines time recycling and reuse mechanisms in the time domain with routing, spectrum and core assignment (RSCA) in the spatial-spectrum domain. Specially, pretreatment techniques include super-channel (Sp-Ch) order pre-definition and time-spectrum partition. These appropriate operations are ready for efficient resource searching and requests assignment. Taking transmission quality into consideration, XT-avoid principle is involved in Sp-Ch order pre-definition and dynamic time domain mechanisms to realize the fair and flexible provisioning. XT-awareness is included in the final allocation step to rank available resources options. Simulation results confirm that the dynamic HTA-RSCA can reduce network blocking probability (BP) than comparison algorithms. To the best of our knowledge, this is the first attempt applying time mechanisms to address dynamic provisioning of hybrid IR and AR requests in SDM-EONs.

混合立即请求 (IR) 和高级预留 (AR) 是未来 SDM-EON 为适应不确定性和服务丰富性而不可避免的流量模型。与传统的 IR 处理即时服务（如聊天消息）不同，AR 可以通过延迟分配到云计算、e-science、IPTV 等延迟容忍请求来平衡流量负载。 尽管 IR/AR 混合流量在未来的 SDM 中必不可少- EONs，特别是在解决动态 RSCA 问题时会出现几个问题。最重要的是，需要考虑核间串扰（XT）和资源公平性，以满足高质量传输并避免先前到达的 AR 请求不必要的资源占用。

我们提出了一种动态 HTA-RSCA 算法，该算法将时域中的时间回收和重用机制与空间频谱域中的路由、频谱和核心分配 (RSCA) 相结合。特别地，预处理技术包括超通道（Sp-Ch）阶预定义和时谱划分。这些适当的操作为高效的资源搜索和请求分配做好了准备。考虑到传输质量，在Sp-Ch阶数预定义和动态时域机制中加入XT-avoid原则，实现公平灵活的开通。XT-awareness 包含在最终分配步骤中，以对可用资源选项进行排名。仿真结果证实，动态 HTA-RSCA 可以比比较算法降低网络阻塞概率 (BP)。据我们所知，