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首页> 外文期刊>Internet of Things Journal, IEEE >D2D Communications-Assisted Traffic Offloading in Integrated Cellular-WiFi Networks
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D2D Communications-Assisted Traffic Offloading in Integrated Cellular-WiFi Networks

机译：集成蜂窝WiFi网络中的D2D通信辅助流量分流

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摘要

Offloading cellular traffic to WiFi networks plays an important role in alleviating the increasing burden on cellular networks. However, excessive traffic offloading brings severe packet collisions into a WiFi network due to its contention-based medium access scheme, which significantly reduces the WiFi network's throughput. In this paper, we propose DAO, a device-to-device (D2D) communications-assisted traffic offloading scheme to improve the amount of traffic offloaded from cellular to WiFi in integrated cellular and WiFi networks. Specifically, in an integrated cellular-WiFi network, the cellular network exploits D2D communications in licensed cellular bands to aggregate traffic from cellular users before offloading it to the WiFi network to reduce the number of contending users in WiFi access. The traffic offloading process in DAO is formulated as an optimization problem that jointly takes into account the activations of aggregation nodes (ANs) and the connections between ANs and offloading users to maximize the offloaded traffic while guaranteeing the long-term data rates required by the offloading users. Extensive simulation results reveal the significant performance gain achieved by DAO over the existing schemes.
机译：将蜂窝流量卸载到WiFi网络在减轻蜂窝网络日益增加的负担方面起着重要作用。但是，过多的流量分流由于其基于竞争的媒体访问方案而给WiFi网络带来了严重的数据包冲突，从而大大降低了WiFi网络的吞吐量。在本文中，我们提出了DAO，一种设备到设备（D2D）通信辅助的流量卸载方案，以提高集成蜂窝和WiFi网络中从蜂窝到WiFi的流量卸载量。具体来说，在集成的蜂窝WiFi网络中，蜂窝网络利用许可的蜂窝频段中的D2D通信来聚合来自蜂窝用户的流量，然后再将其卸载到WiFi网络中，以减少WiFi接入中竞争的用户数量。 DAO中的流量卸载过程被表述为一个优化问题，该优化问题综合考虑了聚合节点（AN）的激活以及AN与卸载用户之间的连接，以最大程度地减少卸载的流量，同时保证卸载所需的长期数据速率用户。大量的仿真结果表明，DAO在现有方案上可实现显着的性能提升。

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