Capacity Analysis of Vehicular Communication Networks

verfasst von: Ning Lu, Xuemin (Sherman) Shen

Verlag: Springer New York

Buchreihe : SpringerBriefs in Electrical and Computer Engineering

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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This SpringerBrief focuses on the network capacity analysis of VANETs, a key topic as fundamental guidance on design and deployment of VANETs is very limited. Moreover, unique characteristics of VANETs impose distinguished challenges on such an investigation. This SpringerBrief first introduces capacity scaling laws for wireless networks and briefly reviews the prior arts in deriving the capacity of VANETs. It then studies the unicast capacity considering the socialized mobility model of VANETs. With vehicles communicating based on a two-hop relaying scheme, the unicast capacity bound is derived and can be applied to predict the throughput of real-world scenarios of VANETs. The downlink capacity of VANETs is also investigated in which access infrastructure is deployed to provide pervasive Internet access to vehicles. Different alternatives of wireless access infrastructure are considered. A lower bound of downlink capacity is derived for each type of access infrastructure. The last section of this book presents a case study based on a perfect city grid to examine the capacity-cost trade-offs of different deployments since the deployment costs of different access infrastructure are highly variable.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract

Vehicular networks play an important role in both promoting the development of next generation intelligent transportation systems and offering mobile data services to vehicle users. The capacity scaling laws of vehicular networks characterize the trend of network capacity when vehicle population grows in the network, which represent the fundamental property of vehicular networks and could be applied to predict the network performance and thereby provide valuable guidance on network design and deployment. Despite extensive research in the field of vehicular networking, the network capacity is not well understood. In this chapter, we first overview the vehicular network, and then briefly introduce the research of capacity scaling laws for general wireless networks. Finally, we present the existing works in the capacity study of vehicular networks.

Ning Lu, Xuemin (Sherman) Shen

Chapter 2. Capacity Scaling Laws of Wireless Networks

Abstract

The capacity scaling law of wireless networks has been considered as one of the most fundamental issues. In this chapter, we aim at providing a comprehensive overview of the development in the area of scaling laws for throughput capacity in wireless networks. We begin with background information on the notion of throughput capacity of random networks. Based on the benchmark random network model, we then elaborate the advanced strategies adopted to improve the throughput capacity, and other factors that affect the scaling laws. We also present the fundamental tradeoffs between throughput capacity, delay, and mobility. Finally, the capacity for hybrid wireless networks are surveyed, in which there are at least two types of nodes functioning differently, e.g., normal nodes and infrastructure nodes.

Ning Lu, Xuemin (Sherman) Shen

Chapter 3. Unicast Capacity of Vehicular Networks with Socialized Mobility

Abstract

In this chapter, we investigate the throughput capacity of social-proximity vehicular networks. The considered network consists of N vehicles moving and communicating on a scalable grid-like street layout following the social-proximity model: each vehicle has a restricted mobility region around a specific social spot, and transmits via a unicast flow to a destination vehicle which is associated with the same social spot. Furthermore, the spatial distribution of the vehicle decays following a power-law distribution from the central social spot towards the border of the mobility region. With vehicles communicating using a variant of the two-hop relay scheme, the asymptotic bounds of throughput capacity are derived in terms of the number of social spots, the size of the mobility region, and the decay factor of the power-law distribution. By identifying these key impact factors of performance mathematically, we find three possible regimes for the throughput capacity and show that inherent mobility patterns of vehicles have considerable impact on network performance.

Ning Lu, Xuemin (Sherman) Shen

Chapter 4. Downlink Capacity of Vehicular Networks with Access Infrastructure

Abstract

Wireless access infrastructure, such as Wi-Fi access points and cellular base stations, plays a vital role in offering pervasive Internet services to vehicles. However, the deployment costs of different access infrastructure are highly variable. In this chapter, we analyze the downlink capacity of vehicles and investigate the capacity-cost tradeoffs for the network in which access infrastructure is deployed to provide a downlink data pipe to all vehicles. Three alternatives of wireless access infrastructure are considered, i.e., cellular base stations (BSs), wireless mesh backbones (WMBs), and roadside access points (RAPs). We first derive a lower bound of downlink capacity for each type of access infrastructure. We then present a case study based on a ideal city grid of 400 km² with 0.4 million vehicles, in which we examine the capacity-cost tradeoffs for different deployment solutions in terms of both capital expenditures (CAPEX) and operational expenditures (OPEX). Rich implications from the results provide fundamental guidance on the choice of cost-effective wireless access infrastructure for the emerging vehicular networking.

Ning Lu, Xuemin (Sherman) Shen

Chapter 5. Conclusions and Future Directions

Abstract

In this chapter, we summarize the main concepts and results presented in this monograph and highlight future research directions.

Ning Lu, Xuemin (Sherman) Shen

Backmatter

Titel: Capacity Analysis of Vehicular Communication Networks
verfasst von: Ning Lu
Xuemin (Sherman) Shen
Verlag: Springer New York
Electronic ISBN: 978-1-4614-8397-7
Print ISBN: 978-1-4614-8396-0
DOI: https://doi.org/10.1007/978-1-4614-8397-7

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Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Chapter 2. Capacity Scaling Laws of Wireless Networks

Chapter 3. Unicast Capacity of Vehicular Networks with Socialized Mobility

Chapter 4. Downlink Capacity of Vehicular Networks with Access Infrastructure

Chapter 5. Conclusions and Future Directions

Backmatter

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