 options. If any of the SYN flags do not have the MPTCP options, the session must continue automatically on a regular TCP connection. This scenario occurs when the host does not process MPTCP options or when intermediate devices prohibit the use of options. In the case where the data is not contiguous, which could happen when a single TCP connection retransmits data from another recently closed TCP connection, the recipient must close the TCP connection with the RST flag and the MP_FAIL option. The recipient must reject all data that follow the specified DSN sequence number. The source may try to restart the TCP connection. Bibliography General Documentation [3GPP TS 23.402] Architecture enhancements for non-3GPP accesses - 2016. [3GPP TS 24.302] Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access networks - 2016. [3GPP TS 24.234] WLAN User Equipment (WLAN UE) to network protocols - 2015. [3GPP TS 33.234] Wireless Local Area Network (WLAN) interworking security - 2016. [3GPP TS 33.402] 3GPP System Architecture Evolution (SAE); Security aspects of non-3GPP accesses - 2014. Integration of Cellular and Wi-Fi Networks - 4G Americas - 2013. Wi-Fi Roaming Guidelines - GSMA - IR.61 - 2015. WLAN Traffic Offload in LTE - A. Schumacher, J. Schlienz - Rohde & Schwarz - 2012. Analysis of LTE/Wi-Fi Aggregation Solutions - Netmanias - 2016. Network Architecture for LTE and Wi-Fi Interworking - Netmanias - C. Yoo - 2012. Wi-Fi Integration to the 4G Mobile Network, First Edition. André Perez. C ISTE Ltd 2018. Published by ISTE Ltd and John Wiley & Sons, Inc. Wi-Fi Integration to the 4G Mobile Network Chapter 1: Architecture Based on Wi-Fi Interface [3GPP TS 23.203] Policy and charging control architecture - 2016. [3GPP TS 29.273] Evolved Packet System (EPS); 3GPP EPS AAA interfaces - 2016. Chapter 2: MAC Layer [IEEE 802.11] Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications - 2012. 802.11 Wireless Network: The definitive guide - M. Gast - O'Reilly - 2005. [NIST 800-97] Establishing Wire