Abstract
Directional transmission in millimeter wave (mmWave) communications results in prolonged access times. This is attributed to the increased number of conducted measurements to determine optimum beam directions at the mobile station (MS) and base station (BS) that return the highest received signal levels. Additionally, once these beams are determined and links are established for data-planes, then blockage effects and outages make these links more vulnerable to link failures, resulting in communications drops. Hence, dynamic and fast recovery schemes are required to maintain communications sessions following the beam access stage. In this paper, a novel recovery access scheme is proposed for multi-point mmWave communications based on fog access points (AP). Namely, the scheme leverages diversity and network coding techniques to achieve near-instantaneous recovery times, without the need for beam scanning. The scheme features near-instantaneous data recovery times and efficient power consumption as compared to traditional recovery methods.
Highlights
IntroductionMillimeter wave (mmWave) technology has emerged as a major component of 5G networks due to its contiguous abundant channelization and its ability to provide high data rates [1,2,3]
Millimeter wave technology has emerged as a major component of 5G networks due to its contiguous abundant channelization and its ability to provide high data rates [1,2,3].The International Telecommunication Union’s IMT-2020 group along with the 3GPP specifications set the first Phase of 5G cellular networks, known as 5G new Radio (NR)
Of the fewisinitial studies onwork the implementation of mmWave communications in multi-point fog one access points proposed
Summary
Millimeter wave (mmWave) technology has emerged as a major component of 5G networks due to its contiguous abundant channelization and its ability to provide high data rates [1,2,3]. Fog nodes (APs) enable small cell implementation, where these APs are at short-proximity and low powered They are capable of interconnecting thousands of devices (enabling IoT) while boosting capacities and reducing latencies. One major challenge here is initial beam access (beam acquisition) and beam adaptation between these APs and the MSs. The established directional links at mmWave bands are highly sensitivity to obstacles and objects in the propagation link, e.g., human blockage can yield in 20 dB losses. Received signal levels (RSS) can decrease significantly below receiver sensitivity, yielding blockage-based outages [7] Along these lines, a major design challenge for standalone mmWave communications is the design of efficient beam-adaptation schemes that overcome rapid channel fluctuations and blockage effects. This link adaptation stage is subsequent to initial beam access, termed as link maintenance
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