Product Description
Performance Modeling for Multipath Mobile Data Offloading in Cellular/WiFi Networks
Abstract-With the proliferation of mobile devices in recent years, the volume of global mobile data traffic has grown exponentially. As a result, effective approaches for mobile data offloading are urgently required. In the past few years, two main WiFi offloading techniques, namely opportunistic offloading and delayed offloading, have been widely discussed. A promising L4-approach known as multipath TCP (MPTCP) has recently been standardized which allows a single transport connection to use multiple paths simultaneously over multiple interfaces, which then calls for a new WiFi offloading model that considers discontinuous WiFi connection periods. This paper presents an
analytical model for multipath WiFi offloading in deriving the aggregate offloading time via an alternative path for the use of multipath offloading. Then the respective offloading volume and ratio are computed. Our theoretical results are supported by extensive simulations. We show how this model further assists the cellular operators to make better decision in resource allocation. Compared with opportunistic offloading, multipath offloading results in a significantly improved performance in the support for a guaranteed minimum bit-rate.
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