Distributed resource directory architecture in Machine-to-Machine communications
Distributed resource directory architecture in Machine-to-Machine communications
复制标题
机器对机器通信中的分布式资源目录架构
DOI：
10.1109/wimob.2013.6673379
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
T. Ojala
中科院分区：
文献类型：
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作者：
Meirong Liu;T. Leppänen;E. Harjula;Zhonghong Ou;A. Ramalingam;M. Ylianttila;T. Ojala
机器对机器（M2M）通信的出现是为了实现所有联网设备之间的无处不在的通信。 M2M 应用中的一个具有挑战性的问题是有效地发现设备提供的资源。这一挑战来自两个方面：（1）大量异构设备共存，并且大多数设备都是受限设备（例如处理能力有限），（2）利用不同的通信协议来访问设备提供的不同类型的资源（例如传感器提供的湿度信息）。本文提出了M2M应用的分布式资源目录架构，简称DRD4M。 DRD4M 支持使用 HTTP 和 CoAP 协议进行资源注册和查找的异构设备。这实现了异构设备之间的互操作性以及从包括互联网在内的不同网络对受限设备的资源访问。 DRD4M 引入了两个组件：用于注册资源的资源注册组件和具有缓存功能的资源查找组件，用于通过过滤处理资源查找。 DRD4M 中引入了点对点 (P2P) 覆盖来连接资源对等点，以避免单点故障。实现了真实世界的原型并通过演示应用程序进行了验证。提供了资源查找响应时间方面的初步性能评估。
Machine-to-Machine (M2M) communications emerge to achieve ubiquitous communications among all the networked devices. One challenging problem in M2M applications is to discover the resources provided by the devices efficiently. This challenge arises from two perspectives: (1) a large number of heterogeneous devices co-exist and most of them are constrained devices (e.g., limited processing capability), (2) different communication protocols are utilized to get access to different types of resources provided by the devices (e.g., humidity information provided by a sensor). This paper proposes distributed resource directory architecture for M2M applications, referred to as DRD4M. The DRD4M supports heterogeneous devices using HTTP and CoAP protocols for resource registration and lookup. This enables the interoperability among heterogeneous devices and resource access to constrained devices from disparate network including the Internet. The DRD4M introduces two components: a resource registration component for registering resources and a resource lookup component with caching functionality for handling resource lookup with filtering. A peer-to-peer (P2P) overlay is introduced in DRD4M to connect resource peers to avoid single point of failure. A real-world prototype is implemented and is verified with a demo application. Preliminary performance evaluation in terms of response time of resource lookup is provided.