Showing papers by "Amitava Ghosh published in 2013"
TL;DR: This paper proposes a tractable baseline multicast D2D model, and uses it to analyze important multicast metrics like the coverage probability, mean number of covered receivers and throughput, and examines how the multicast performance would be affected by certain factors like dynamics and network assistance.
Abstract: Multicast device-to-device (D2D) transmission is important for applications like local file transfer in commercial networks and is also a required feature in public safety networks. In this paper we propose a tractable baseline multicast D2D model, and use it to analyze important multicast metrics like the coverage probability, mean number of covered receivers and throughput. In addition, we examine how the multicast performance would be affected by certain factors like mobility and network assistance. Take the mean number of covered receivers as an example. We find that simple repetitive transmissions help but the gain quickly diminishes as the repetition time increases. Meanwhile, mobility and network assistance (i.e. allowing the network to relay the multicast signals) can help cover more receivers. We also explore how to optimize multicasting, e.g. by choosing the optimal multicast rate and the optimal number of retransmission times.
118 citations
Posted Content•
TL;DR: An overview of D2D standardization activities in 3GPP is provided, outstanding technical challenges are identified, lessons from initial evaluation studies are drawn, and "best practices" in the design of a D1D-enabled air interface for LTE-based cellular networks are summarized.
Abstract: Device-to-device (D2D) communication will likely be added to LTE in 3GPP Release 12. In principle, exploiting direct communication between nearby mobile devices will improve spectrum utilization, overall throughput, and energy consumption, while enabling new peer-to-peer and location-based applications and services. D2D-enabled LTE devices can also become competitive for fallback public safety networks, that must function when cellular networks are not available, or fail. Introducing D2D poses many challenges and risks to the long-standing cellular architecture, which is centered around the base station. We provide an overview on D2D standardization activities in 3GPP, identify outstanding technical challenges, draw lessons from initial evaluation studies, and summarize "best practices" in the design of a D2D-enabled air interface for LTE-based cellular networks.
78 citations