An Effective Wide-Bandwidth Channel Access in Next-Generation WLAN-Based V2X Communications

Abstract

As Intelligent Transport System (ITS) applications are diversified and amount of ITS data increases, high throughput and reliability are required in next-generation V2X communications. In order to meet such increased throughput and reliability requirements, IEEE 802.11bd, the next-generation V2X communication standard, has commenced standard development. One of the main features of IEEE 802.11bd is a 20-MHz bandwidth transmission. In this paper, a novel wide-bandwidth channel access scheme in next-generation Wireless Local Area Network (WLAN)-based vehicular communications is proposed. The proposed scheme is designed to provide fairness with other ITS devices and channel efficiency considering adjacent channel interference. By using the proposed scheme, through extensive simulations, it is verified that, while satisfying the fairness requirement with other ITS devices, the channel access delay of wide-bandwidth packet transmission can be optimized.

A Study of Channel Bonding in IEEE 802.11bd Networks

“…Various aspects of IEEE 802.11bd networks are studied in many papers [28], [37], [43]- [51]. Paper [43] The authors of [37], [46]- [48] compare the performance of IEEE 802.11p and IEEE 802.11bd.…”

“…However, the IEEE 802.11bd channel bonding techniques have not been well investigated in the literature. To the best of our knowledge, only two papers study IEEE 802.11bd channel bonding techniques, namely [28], [52]. However, a substantial drawback of [28] is that the authors compare the channel bonding techniques only in terms of frame transmission delays neglecting the PLR, although V2X applications impose QoS requirements on both transmission delays and the PLR, and the PLR also has a significant impact on the performance.…”

“…To the best of our knowledge, only two papers study IEEE 802.11bd channel bonding techniques, namely [28], [52]. However, a substantial drawback of [28] is that the authors compare the channel bonding techniques only in terms of frame transmission delays neglecting the PLR, although V2X applications impose QoS requirements on both transmission delays and the PLR, and the PLR also has a significant impact on the performance. Moreover, the authors do not consider the effect of hidden nodes, assuming that all the STAs are located in the transmission range of each other, which is unrealistic for vehicular networks.…”

“…In contrast to [28], we examine a more realistic scenario, which includes vehicles moving on a highway and RSUs located on the highway. Moreover, assessing the performance of NGV STAs and their impact on non-NGV STAs, we take into account not only frame transmissions delays but also the PLR.…”

“…• In contrast to the existing studies, using extensive simulations in ns-3 [27], we provide a comparative analysis of the three channel bonding techniques defined in the IEEE 802.11 family of standards and the single-channel access method, taking into account both frame transmission delays and the PLR for both NGV and non-NGV STAs. Moreover, unlike [28], we also consider the effect of hidden nodes by simulating a more realistic highway scenario.…”