HS-TTP bus design and implementation
Yanbao Ma, Xiaodong Tu, Yiming Du, Jun Xie, Yan Ming · Journal of Physics Conference Series · 2025
Abstract With the escalating demand for QoS (Quality of Service) in safety-critical domains such as automotive electronics and aerospace, establishing communication infrastructures that integrate strict determinism with high bandwidth has emerged as a common industry-wide challenge. While the TTP (Time-Triggered Protocol) provides deterministic communication guarantees for safety-critical systems through its rigorous time synchronization and fault-tolerant design, traditional TTP architectures struggle to meet modern high-bandwidth requirements. Addressing the limitations of existing solutions, this paper proposes an HS-TTP (High-Speed Time-Triggered Protocol) bus architecture. At the physical layer, it adopts an MLVDS driver circuit, while at the coding layer, it incorporates 4B5B encoding with NRZI modulation, a multi-phase oversampling architecture, and an error-checking mechanism, thereby enabling a deterministic 100 Mbps communication system. Experimental results demonstrate that the HS-TTP architecture retains TTP’s inherent temporal determinism while significantly improving bus bandwidth, offering a viable pathway for next-generation real-time systems in high-throughput scenarios.