The wide diffusion of mobile devices that natively support ad hoc communication technologies has led to several protocols for enabling and optimizing Mobile Ad Hoc Networks (MANETs). Nevertheless, the actual utilizati...The wide diffusion of mobile devices that natively support ad hoc communication technologies has led to several protocols for enabling and optimizing Mobile Ad Hoc Networks (MANETs). Nevertheless, the actual utilization of MANETs in real life seems limited due to the lack of protocols for the automatic creation and evolution of ad hoc networks. Recently, a novel P2P protocol named Wi-Fi Direct has been proposed and standardized by the Wi-Fi Alliance to facilitate nearby devices’ interconnection. Wi-Fi Direct provides high-performance direct communication among devices, includes different energy management mechanisms, and is now available in most Android mobile devices. However, the current implementation of Wi-Fi Direct on Android has several limitations, making the Wi-Fi Direct network only be a one-hop ad-hoc network. This paper aims to develop a new framework for multi-hop ad hoc networking using Wi-Fi Direct in Android smart devices. The framework includes a connection establishment protocol and a group management protocol. Simulations validate the proposed framework on the OMNeT++ simulator. We analyzed the framework by varying transmission range, number of hops, and buffer size. The results indicate that the framework provides an eventual 100% packet delivery for different transmission ranges and hop count values. The buffer size has enough space for all packets. However, as buffer size decreases, the packet delivery decreases proportionally.展开更多
目前市场上存在许多即时通信软件,如QQ,What s App,微信等。它们的通信机制是基于传统互联网模式,需连接网络基础设施才能为用户提供服务。现实中连接不到无线网络接入点(AP)或移动网络的情况很常见,因此这种服务并不总是可用的。基于...目前市场上存在许多即时通信软件,如QQ,What s App,微信等。它们的通信机制是基于传统互联网模式,需连接网络基础设施才能为用户提供服务。现实中连接不到无线网络接入点(AP)或移动网络的情况很常见,因此这种服务并不总是可用的。基于上述背景,设计并实现了一种基于Android平台的Wi-Fi Direct即时通信系统,它可在两个或更多的智能手机之间建立ad-hoc网络来进行即时通信。实验结果显示,该系统具有稳定性好、可靠性高、传输速率高等特点。展开更多
文摘The wide diffusion of mobile devices that natively support ad hoc communication technologies has led to several protocols for enabling and optimizing Mobile Ad Hoc Networks (MANETs). Nevertheless, the actual utilization of MANETs in real life seems limited due to the lack of protocols for the automatic creation and evolution of ad hoc networks. Recently, a novel P2P protocol named Wi-Fi Direct has been proposed and standardized by the Wi-Fi Alliance to facilitate nearby devices’ interconnection. Wi-Fi Direct provides high-performance direct communication among devices, includes different energy management mechanisms, and is now available in most Android mobile devices. However, the current implementation of Wi-Fi Direct on Android has several limitations, making the Wi-Fi Direct network only be a one-hop ad-hoc network. This paper aims to develop a new framework for multi-hop ad hoc networking using Wi-Fi Direct in Android smart devices. The framework includes a connection establishment protocol and a group management protocol. Simulations validate the proposed framework on the OMNeT++ simulator. We analyzed the framework by varying transmission range, number of hops, and buffer size. The results indicate that the framework provides an eventual 100% packet delivery for different transmission ranges and hop count values. The buffer size has enough space for all packets. However, as buffer size decreases, the packet delivery decreases proportionally.
文摘目前市场上存在许多即时通信软件,如QQ,What s App,微信等。它们的通信机制是基于传统互联网模式,需连接网络基础设施才能为用户提供服务。现实中连接不到无线网络接入点(AP)或移动网络的情况很常见,因此这种服务并不总是可用的。基于上述背景,设计并实现了一种基于Android平台的Wi-Fi Direct即时通信系统,它可在两个或更多的智能手机之间建立ad-hoc网络来进行即时通信。实验结果显示,该系统具有稳定性好、可靠性高、传输速率高等特点。
