Connectionless Service in ATM Networks

小行星9305376 这个项目涉及在ATM网络中支持无连接业务的问题。 这个问题的紧迫性源于需要将局域网和城域网（通常工作在无连接模式）与面向连接的ATM互连。 这个问题是相当具有挑战性的，因为ATM网络要求用户建立连接，并事先声明每个连接上的预期流量。 然后，网络使用这些信息为各个用户分配带宽。 另一方面，无连接的源本质上是不可预测的，因此避开了ATM带宽分配策略，并潜在地损害了网络效率。 在这个项目中，一个方案-无连接服务器（CLS）覆盖网络-进行了研究。该方案允许有效地处理ATM中的无连接业务。 各种设计选项（拓扑连接、带宽分配、缓冲区管理等）的审查，性能模型和标准，他们的选择开发。 CLS方案将与其他无连接支持方案进行比较 （带宽预留和空中传输）和各自的利弊将进行评估。 最后，一个混合方案的特点结合所有的计划将被检查，试图联合收割机结合他们的好处，同时避免他们的陷阱。 ***

9305376 Gerla This project involves the problem of supporting connectionless service in an ATM network. The urgency of this problem stems from the need to interconnect LANs and MANs (typically, operated in a connectionless mode) to the connection oriented ATM. The problem is quite challenging because the ATM network requires that users set up connections and declare in advance the expected traffic on each connection. The network then uses this information to allocate bandwidth to individual users. Connectionless sources, on the other hand, are by their nature unpredictable, thus eluding the ATM bandwidth allocation strategy, and potentially compromising network efficiency. In this project, a scheme - the Connectionless Server (CLS) overlay network - is investigated. This scheme permits efficient handling of connectionless traffic in ATM. Various design options (topology connectivity, bandwidth allocation, buffer management, etc.) are examined, and performance models and criteria for their selection are developed. The CLS scheme will be compared with other connectionless support schemes (Bandwidth Reservation and On-the-Fly Transmission) and the respective pros and cons will be evaluated. Finally, a hybrid scheme combining features of al of the schemes will be examined in an attempt to combine their benefits while avoiding their pitfalls. ***