IEEE 802.11P VS LTE-A for vehicular communication

Why to use LTE-A for vehicular communication ? Here we provide a brief IEEE 802.11P VS LTE-A comparision.

There are several reasons to choose LTE-A for vehicular communication.

Licensed communication: LTE-A communication is based on the licensed band as compared to IEEE 802.11p, so there will be a control for interference on V2V in LTE-A networks that can easily be manageable, either by the operator or the vehicles.

Coverage: LTE-A relies on the deployment of eNBs, which have coverage of approximately 1000 m, which solves the problem of poor, intermittent, and short-lived connectivity in IEEE 802.11p. For instance, in IEEE 802.11p connection performance suffers severely in non-line of sight (NLOS) environments such as metropolitan city areas where big skyscrapers prevent (shadow or scatter) signals frequently, which brings out fading scenarios. On the contrary, the eNBs in LTE-A networks provide much better performance in NLOS environments due to their position in higher stature.

Scalability: LTE-A networks are accessible for a large number of cellular devices, thanks to its scalable bandwidth, as compared to IEEE 802.11p, which is not scalable for high vehicle density scenarios and also lacks a mechanism to quickly disseminate messages over an increased coverage range.

CAPEX/OPEX: LTE-A uses only one Enb for coverage, which saves CAPEX/OPEX as compared to IEEE 802.11p, which needs many road side units (RSUs) for coverage and to communicating with the Internet.

Capacity: LTE-A offers high downlink and uplink data rates (up to 1 Gps and 500 Mpbs), applying advanced antenna techniques, which eventually supports a higher number of vehicles inside a cell compared to IEEE802.11p, which only supports data rates up to 27 Mb/s.

Infotainment streaming: Future modern vehicles will be capable of exchanging infotainment content (i.e. audio/video streaming, email, software updates) between them, and this will be possible by using D2D communication over the LTE-A band. Delay: One of the major concerns when considering LTE-A for vehicular communication is delay. LTE-A traffic always crosses infrastructure nodes, even though devices are close to each other. Recent advances in D2D communication in LTE-A mode will solve this problem and offload traffic from infrastructure nodes.

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