Abstract This paper studies the load-balanced routing and admission control for point-to-multipoint traffic flows in elastic optical networks (EONs). EONs have emerged as a promising technology to provide high capacity for next-generation networks. Elastic bandwidth allocation promotes the spectrum utilization efficiency. We consider the problem of constructing bandwidth-guaranteed trees for on-demand point-to-multipoint session requests. A request is accepted, if a multicast tree with sufficient bandwidth on each link can be established. The main objective is to increase the multicast acceptance rate in the network. For this purpose, we propose an efficient scheme, namely optical load-balanced multicast routing with admission control (OLMR-AC), to improve the wavelength resources utilization in the network. As an advantage, OLMR-AC jointly considers both distance and congestion factors to create a multicast session. For each admitted session, a bandwidth–guaranteed steiner tree is provided in which not only the source node has a minimum-cost path to each receiver, but also its overall cost is minimal. The proposed scheme distributes the on-demand traffic flows over the available links fairly. Simulation results show the efficiency of the OLMR-AC algorithm in terms of multicast acceptance rate, average length of lightpaths, throughput, number of transmissions, and load variance.

中文翻译：

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提高弹性光网络中QoS保证的点对多点流量的接受率

摘要 本文研究了弹性光网络（EON）中点对多点流量的负载均衡路由和准入控制。EON 已成为一种为下一代网络提供高容量的有前途的技术。弹性带宽分配，提升频谱利用效率。我们考虑为按需点对多点会话请求构建带宽保证树的问题。如果可以在每条链路上建立具有足够带宽的多播树，则接受请求。主要目标是提高网络中的组播接受率。为此，我们提出了一种有效的方案，即具有准入控制的光负载平衡组播路由（OLMR-AC），以提高网络中波长资源的利用率。作为优势，OLMR-AC 联合考虑距离和拥塞因素来创建组播会话。对于每个被接纳的会话，提供了一个带宽保证的 steiner 树，其中源节点不仅具有到每个接收器的最小成本路径，而且其总成本也是最小的。提议的方案在可用链路上公平地分配按需流量。仿真结果显示了 OLMR-AC 算法在多播接受率、光路平均长度、吞吐量、传输次数和负载变化方面的效率。提议的方案在可用链路上公平地分配按需流量。仿真结果显示了 OLMR-AC 算法在多播接受率、光路平均长度、吞吐量、传输次数和负载变化方面的效率。提议的方案在可用链路上公平地分配按需流量。仿真结果显示了 OLMR-AC 算法在多播接受率、光路平均长度、吞吐量、传输次数和负载变化方面的效率。