Aerial-terrestrial communications: terrestrial cooperation and energy-efficient transmissions to aerial base stations (original) (raw)

Adaptive Energy Efficient Communications for Hybrid Aerial-Terrestrial Systems

2012

Aerial telecommunications networks based on Low Altitude Platforms (LAPs) are expected to optimally meet the urgent needs of emergency relief and recovery operations for tackling large scale natural disasters. The energy efficient operation of such networks is important given the fact that the entire network infrastructure including the battery operated ground terminals, exhibit requirements to operate under power constrained situations. In this paper, we propose and evaluate a real-time adaptive transmission strategy for dynamic selection of direct and cooperative links based on the channel conditions for improved energy efficiency. We show that the cooperation between mobile terrestrial terminals on the ground could improve the energy efficiency in the uplink depending on the temporal behavior of the terrestrial and the aerial uplink channels. The simulation analysis corroborates that the adaptive transmission technique improves the overall energy efficiency of the network.

Designing and implementing future aerial communication networks

IEEE Communications Magazine, 2016

Providing "connectivity from the sky" is the new innovative trend in wireless communications. High and low altitude platforms, drones, aircrafts and airships are being considered as the candidates for deploying wireless communications complementing the terrestrial communication infrastructure. In this article, we report the detailed account of the design and implementation challenges of an aerial network consisting of LTE-

Adaptive energy efficient communications for rapidly deployable aerial-terrestrial networks

2013 IEEE International Conference on Communications Workshops (ICC), 2013

From ground to aerial communication

Proceedings of the 8th ACM international workshop on Wireless network testbeds, experimental evaluation & characterization - WiNTECH '13, 2013

Micro Unmanned Aerial Vehicles (UAVs) employed in civil missions are receiving remarkable attention from both research and industry. UAVs embed more and more sensor technology, and their small mounted cameras allow for efficient mapping of large areas in short time. Yet, civil missions such as rescue operations would need a timely delivery of high-resolution images, which calls for high-speed communication such as provided by WLAN IEEE 802.11n. Driven by extensive experiments, the key finding of this contribution is that 802.11n performs poorly in highly mobile and aerial scenarios, as the throughput between UAVs drops far below the theoretical maximum as soon as they become airborne. This is partially caused by the limitations of the embedded hardware, but also a result of the network dynamics of the aerial links. In order to dissect the origins of the low performance figures, we isolate the potential causes of degradation by analyzing our data of throughput, packet loss, aircraft and antenna orientation, and cruise speed. We discuss quantitatively how practical it is to deliver high-resolution images when being exposed to aerial throughput. We believe that it will be a long way until micro UAVs transferring large-size data become reality and argue for a new amendment of IEEE 802.11 addressing the communication among highly-mobile UAVs.

Aerial Base Station Assisted Cellular Communication: Performance and Trade-Off

IEEE Transactions on Network Science and Engineering, 2021

The use of Aerial Base Stations (ABSs) has received a great deal of attention in academia and industry as a means to support the cellular communication traffic growth. In this article, we focus on obtaining the optimal altitude of an ABS using two criteria-maximum cell coverage area and minimum Symbol Error Rate (SER). Our study is done by using a probabilistic airto-ground channel model, developed for low altitude aerial platforms via simulations on a commercial ray tracing software, for different scenarios like Urban High Rise, Urban, and Suburban. The probability distributions of the received power of the ground users and of the power delay profile at optimal ABS altitude are provided as a function of the size of the cell area. For the SER analysis, we present a system model based on Generalized Frequency Division Multiplexing (GFDM), in a time-frequency grid that is compatible with Long Term Evolution, by implementing parameters for low latency communication at the physical layer. The impact of "Better than Nyquist" pulses on the GFDM system is evaluated in terms of SER performance. From the presented results, a significant improvement is demonstrated compared to the traditional Nyquist pulses. Index Terms-Aerial base station, air-to-ground channel, generalized frequency division multiplexing (GFDM), optimal altitude, pulse shaping filters, symbol error rate (SER).

Downlink Coverage and Rate Analysis of an Aerial User in Integrated Aerial and Terrestrial Networks

ArXiv, 2019

In this paper, the downlink coverage probability and average achievable rate of an aerial user in a vertical HetNet (VHetNet) comprising aerial base stations (aerial-BSs) and terrestrial-BSs are analyzed. The locations of terrestrial-BSs are modeled as an infinite 2-D Poisson point process (PPP) while the locations of aerial-BSs are modeled as a finite 3-D Binomial point process (BPP) deployed at a particular height. We adopt cellular-to-air (C2A) channel model that incorporates LoS and NLoS transmissions between the terrestrial-BSs and the typical aerial user while we assume LoS transmissions for the air-toair (A2A) channels separating the aerial user and aerial-BSs. For tractability reasons, we simplify the expression of the LoS probability provided by the International Telecommunications Union using curve fitting. We assume that the aerial user is associated with the BS (either an aerial-BS or terrestrial-BS) that provides the strongest average received power. Using tools from st...

Energy Efficient Cooperative Strategies in Hybrid Aerial-Terrestrial Networks for Emergencies

2011

Aerial telecommunications networks based on Low Altitude Platforms (LAPs) are expected to optimally meet the urgent needs of emergency relief and recovery operations for tackling large scale natural disasters. The energy efficient operation of such networks is important given the fact that the entire network infrastructure including the battery operated ground terminals, exhibit requirements to operate under power constrained situations. In this paper, we show that the cooperation between mobile terrestrial terminals on the ground could improve the energy efficiency in the uplink depending on the temporal behavior of the terrestrial and the aerial uplink channels. We consider cognitive context aware capabilities that could be utilized to improve the overall lifetime of the mobile ground terminals by dynamically adapting between direct and cooperative relay links. We also discuss a novel network architecture constituted of an integrated and highly dynamic multi-purpose aerial-terrestrial communications infrastructure that can be contextually extended with fast-deploying aerial platforms for emergency communications.

Broadband Communications from Aerial Platform Networks

2004

Provision of broadband services is raising increasing challenges, particularly in operating environments requiring wireless access. In this context an emerging solution based on aerial platforms is attracting increasing amounts of research effort. This concept combines some of the best characteristics of terrestrial and satellite communication systems, and it provides alternative and complementary means of communications, particularly well suited for serving remote regions with low user density, short-term large-scale events and establishment of ad-hoc networks for disaster relief. This paper discusses some basic characteristics of communication systems based on aerial platforms, it outlines alternative network architecture scenarios for provision of wireless access to broadband communication services, and it provides a short overview of the IST project CAPANINA, which is developing broadband communication networks based on the use of aerial platforms.

Energy Efficient Cooperative HAP-Terrestrial Communication Systems

Lecture Notes in Computer Science, 2011

In this paper we study the energy efficiency of hybrid high altitude platform (HAP) and terrestrial communication systems in the uplink. The applications of HAPs in the recent years have gained significant interest especially for telecommunications. A cooperative relay based communication strategy on the ground with a single source-relay pair is considered for the hybrid HAP-terrestrial system. We show that cooperation on ground between the terrestrial terminals could improve the energy efficiency in the uplink depending on the temporal behavior of the channels. Thus by having cognitive context aware capabilities in the ground terminals one could exploit the spatial domain to improve the energy efficiency. The energy efficiency can be further improved by means of proper power allocation between the terrestrial source and relay nodes. We consider the decode and forward based cooperative system for our study with a constraint on the overall bit error probability to achieve a predefined quality of service. Results show that considerable gain in the energy can be attained by exploiting the spatial domain by means of cooperation.

Deployable aerial communication networks

Proceedings of the 9th ACM symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks - PE-WASUN '12, 2012

Aerial (or airborne) telecommunications have been investigated for three decades through the design and the evaluation of stratospheric platforms able to offer multiple types of wireless services. More recently though, a wide range of lower altitude vehicles have been developed and subsequently sparked interest for their compelling features in terms of new applicative perspectives. This paper surveys the civilian aerial communication networks, with an overview of the performance of either high or low altitude platforms. Furthermore, through significant and promising use cases that are likely to gain momentum in the near future, we highlight a series of prominent challenges to be addressed for successful aerial networking deployments and likewise hint at key domains which should, in this regard, require further research efforts.

Aerial-terrestrial communications: terrestrial cooperation and energy-efficient transmissions to aerial base stations (original) (raw)

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