BS ISO 10681-2:2010 - Page 3

Road vehicles. Communication on FlexRay. Communication layer services | Status: Confirmed, Current

1 Scope This part of ISO 10681 specifies the requirements for a communication protocol tailored to meet the requirements of FlexRay-based vehicle network systems as specified in the FlexRay Communications Systems Protocol Specification. As the communication protocol combines the network layer and transport layer functionality (OSI layers 3 and 4), this part of ISO 10681 does not explicitly distinguish between these layer services. The technical features of this communication protocol are as follows:

• — transmit messages with known data length;
• — transmit messages with unknown but finite data length;
• — additional acknowledgement with retry mechanism;
• — routing data on the fly;
• — support of dynamic frame length.