Methods and Apparatus for Detecting and Indicating Uplink (UL) Congestion at a Non-3GPP Access Point

Abstract: methods and apparatus for providing l4s support with regard to non-3gpp untrusted/trusted accesses in which a non-3gpp access point, e.g., a wlan ap or a tnap, is enabled to monitor for uplink congestion with regard to l4s uplink data traffic flows at the non-3gpp ap, detect congestion, and perform explicit congestion notification (ecn) markings is described. in some embodiments, an innermost ip header field corresponding to an uplink l4s data packet, which typically conveys ecn information, in unavailable to the non-3gpp ap, due to ipsec encapsulation. the non-3gpp ap indicates detected congestion, at the non-3gpp ap, in an uplink (ul) traffic flow via setting bits in an outer ip header ecn field. the ap detected ul congestion information is communicated via the outer ip header ecn field to a core network interface device, e.g., a n3iwf or tngf, and subsequently communicated to the inner-most ip header field.

Inventor(s): Paul L. Russell, JR., Yildirim Sahin, Imtiyaz Shaikh, Maulik Vaidya

CPC Classification: H04L43/0882 (Utilisation of link capacity)

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