Understanding Practical Limitations of Network Coding for Assisted Proximate Communication
Understanding Practical Limitations of Network Coding for Assisted Proximate Communication
复制标题
DOI：
10.1109/jsac.2014.2384232
复制
发表时间：
2015-02
影响因子：
16.4
通讯作者：
Alexander Pyattaev;O. Galinina;Sergey D. Andreev;M. Katz;Y. Koucheryavy
中科院分区：
文献类型：
--
作者：
Alexander Pyattaev;O. Galinina;Sergey D. Andreev;M. Katz;Y. Koucheryavy
在下一代无线网络中，设备到设备(D2D)通信为移动用户提供了一种可行的方式，可以在不增加部署网络运营商额外基础设施的成本的情况下减轻其蜂窝流量需求。蜂窝(例如，3GPP LTE)网络辅助可以自动执行用户/服务发现和连接建立过程，以及实现邻近用户之间的安全D2D连接。目前，辅助直接连接仅以未经许可的频段协议(例如WiFi Direct)的形式提供，这促使人们研究如何通过现实的用户和内容分布来了解其实际限制。鉴于人们担心D2D通信可能由于内容的有限而不能很有效地进行，在本文中，我们提倡使用网络编码来升级辅助近距离通信，使其充分发挥其潜力。特别是，我们证明了更简单的网络编码技术能够显著提高通信用户的内容可用性，从而在现实约束下提高卸载性能。受最近流行的无线内容分发系统高于D2D缓存的启发，我们考虑到最先进的D2D技术，为辅助数据缓存和分发贡献了一种实用的方法。
In next-generation wireless networks, device-to-device (D2D) communication represents a feasible way for mobile users to offload their cellular traffic demand without extra costs for deploying additional infrastructure from the network operators. Cellular (e.g., 3GPP LTE) network assistance can automate user/service discovery and connection establishment procedures, as well as enable secure D2D connectivity between proximate users. Currently, assisted direct connectivity is only available in the form of unlicensed-band protocols (e.g., WiFi Direct), which motivates research on understanding its practical limitations with realistic distributions of users and content. Whereas there are concerns that D2D communication alone may not be efficient due to limited content availability, in this paper, we advocate the use of network coding to upgrade assisted proximate communication and make it realize its full potential. In particular, we demonstrate that even simpler network coding techniques are capable to significantly improve the degrees of content availability for communicating users and thus enhance offloading performance under realistic constraints. Inspired by the recent popularity of wireless content distribution systems over D2D caches, we contribute a practical methodology for assisted data caching and distribution, mindful of the state-of-the-art D2D technology.