Node ECU Direct OTA Download for Master ECU Storage Relief

The patent extracts the software package buffering function from the master ECU and relocates it to the node ECUs themselves. Each node ECU directly downloads and buffers its own software package from the OTA server, eliminating the need for the master ECU to store large software packages. This resolves the storage space contradiction while maintaining upgrade coordination through the master ECU's management of the download process.

The patent implements self-service by enabling node ECUs to independently download and buffer their own software packages directly from the OTA server. Each node ECU checks its own storage capacity and manages its own package reception, reducing the processing burden on the master ECU while ensuring reliable coordinated upgrades through centralized download initiation and sequencing.

The patent extracts the software package buffering and forwarding functions from the master ECU and assigns them to individual node ECUs. The master ECU retains only the coordination functions (initiating downloads, managing sequences), while node ECUs handle the computationally intensive tasks of downloading, buffering, and managing their own packages, thus reducing the processing performance burden on the master ECU.

Node ECUs perform self-service by independently checking their storage capacity, downloading their own software packages, and managing their upgrade processes. This distributes the processing workload from the master ECU to individual node ECUs, maintaining reliable centralized management through the master ECU's coordination role while significantly reducing its processing performance requirements.

The patent extracts the package forwarding function from the master ECU and eliminates it entirely. Instead of the master ECU acting as an intermediary that receives and forwards packages (creating a bottleneck), node ECUs directly communicate with the OTA server to download their packages. This removes the master ECU as a transmission bottleneck while maintaining sequence control through centralized download initiation and coordination.

The patent changes the communication topology from a hierarchical structure (OTA server → master ECU → node ECUs) to a more distributed structure (OTA server ↔ node ECUs, with master ECU coordinating). This dimensional change in the data flow architecture eliminates the single-point bottleneck at the master ECU, enabling parallel downloads while maintaining controlled sequencing through the master ECU's coordination role.

The patent extracts the package buffering requirement from the master ECU and relocates it to individual node ECUs. Each node ECU only needs to buffer its own software package, dramatically reducing the storage space requirement for the master ECU. This redistribution of buffering responsibilities maintains reliable package management while significantly reducing the storage capacity needed at the master ECU level.

The patent applies local quality by enabling each node ECU to have its own localized buffering capability for its specific package, rather than requiring centralized buffering at the master ECU. This localized approach ensures that each node has the necessary storage for its upgrade while the master ECU maintains only minimal coordination data, optimizing the storage distribution across the system and reducing overall costs.