Analysis of Medium Access Protocols for Power Line Communication Realizing In-Car Networks

Worst-Case Access Delay of HomePlug Green PHY (HPGP) for Delay-Critical In-Vehicle Applications

“…In Fig. 6, the modified HPGP [18] is adopted to cope with more nodes, i.e., 10 nodes, the HPGP based solution performs even better than the standard CAN and thus can better cope with a large node scenarios. It is worth noting that the number of contending nodes over a single bus in vehicle should be properly designed in order to satisfy the hard delay requirement.…”

“…It is clear that when collision happens, i.e., BPC >= 1, the worst delay performance cannot satisfy the hard requirement of in-vehicle control and safety applications, which is largely because of the beacon periods incurred by the retransmission. For the cases when more nodes need to access the channel, our work [20] and [18] have proposed modified HPGP solutions to achieve collision free transmission for in-vehicle networks, which is out of scope of this paper. Compared with Table I, the worst delay bounds obtained show that it is not recommended to use HPGP in a direct manner for delay-critical in-vehicle communications, particularly when the number of nodes and priorities are not properly configured to avoid collision.…”

Delay Analysis and Time-Critical Protocol Design for In-Vehicle Power Line Communication Systems

“…The adoption of HomePlug into vehicle communications has been considered until recently [26]- [28], in which the authors proposed modified HomePlug and IEEE 1901 protocols for in-car PLC. However, it is not clear what is the fundamental limit of the solution in handling time-critical invehicle data transmission.…”

“…The CAN bus, which is used in powertrain and driver assistant control domains, can support up to 8 byte data but with stringent delay and transmission rate requirements. Therefore, given a typical invehicle frame length of up to 8 byte, we consider the same case [26] where the short MAC protocol Data Unit (MPDU) with only frame control (128 bits) is employed by HPGP for in-vehicle communications purposes. Therefore, the equivalent total frame length of short MPDU can be derived as as L s = 2500 bits, which includes the aforementioned protocol overhead and data frame.…”

Performance Evaluation of Networking Protocols for Connected Vehicles

“…PLCs are designed to transfer high level of data rate that is undesirable in-vehicle field because it causes somewhat high protocol overhead. However, according to (T. Gehrsitz, 2014), it is possible to optimize HomePlug GP protocol to meet in-vehicular communication requirements. In this paper, it has been shown that optimized HomePlug GP could be a valid candidate for in-vehicular communication because it provides prioritization according to importance of each message as CAN does.…”