Combining Cooperative Relaying and Analog Network Coding to Improve Network Connectivity and Capacity in Vehicular Networks

Abstract

Vehicular networks are a promising field in wireless networks enabling connection vehicles among themselves or between a vehicle and an infrastructure. These networks aim to offer several potential applications ranging from road safety applications and driver assistance to infotainment. However, these networks have limited coverage and capacity. Among the options that may help overcome these limitations, we can quote cooperative communications and analog network coding (ANC). The idea of this paper is to combine these two concepts in order to improve the vehicular network connectivity and capacity. The proposed solution is divided into three stages. The first stage aims at identifying the coding and relaying opportunities. The second stage uses a distributed scheme to select the Best Vehicular Relay among potential candidates when relaying is required, while the last stage performs our joint relaying and coding strategy on the received signals. In order to validate our approach, numerical analysis is performed to evaluate the performances in terms of raw Bit Error Rate (BER) and throughput. This confirmed our expectation showing that cooperative relaying achieves better performance than the direct transmission in terms of raw BER but decreases the throughput. However, by deploying analog network coding on the Best Vehicular Relay, the throughput is improved considerably at the price of a slight deterioration of the raw BER.

Improved Data Transmission Scheme of Network Coding Based on Access Point Optimization in VANET

“…The access points will adopt different relaying strategies to facilitate the information transmission between source nodes and destination nodes according to actual scenarios, such as information forwarding after the signal amplification or information forwarding after decoding [8]. Cooperative relaying can be realized through self-adaptation or fixed modes.…”

Distributed relay selection with network coding for data dissemination in vehicular ad hoc networks

“…The problem of multi-hop data dissemination in VANETs was considered in Wu et al, 33 where the authors proposed a lightweight protocol which employs dynamically generated backbone vehicles to multicast packets so as to reduce the MAC-layer contention time at each node while maintaining a high packet dissemination ratio. Khlass et al 34 proposed using cooperative relaying of vehicle for the poor channel quality between the nodes and the RSU to improve the connectivity of the network. For the bidirectional communication between the vehicle and RSU, it further uses analog network coding in relay node to improve the communication efficiency.…”

“…7,[30][31][32][33][34] Wang and Yin 30 studied the network-coding-based retransmission scheme on RSU and proposed an IDNC multicast retransmission algorithm that considers multiple vehicular communication characteristics. Simulation results that approved the algorithm are efficient in improving the data dissemination delay and download rate in VANETs.…”