Protocol data unit systems and methods
A method of processing a protocol data unit (PDU) set for a data network includes steps of (a) receiving a first PDU packet of the PDU set, (b) receiving, subsequent to reception of the first PDU packet, a second PDU packet of the PDU set, (c) determining, after receiving the first and second PDU packets, a congestion status of the data network for the PDU set, (d) controlling, based on the determined congestion status, a handling state of the second PDU packet to match a handling state of the first PDU packet, and (e) transmitting the first PDU packet and the controlled second PDU packet to a destination receiver of the data network.
1 . A method of managing a congestion indication utilizing a user plane function (UPF) of a data network, comprising the steps of;
establishing, by the UPF, a multi-access protocol data unit (MA-PDU) session for an application, wherein a first PDU session of the MA-PDU session is enabled with an explicit congestion notification (ECN) marking for a low latency low loss scalable throughput (L4S) standard;
receiving, by the UPF from a client of the application, a congestion indication for the first PDU session;
determining, based on at least one of a policy of the MA-PDU session and a first congestion window of the first PDU session, whether to forward the congestion indication to a server of the application; and
executing, based on the step of determining, (a) forwarding of the congestion indication to the application server, or (b) dropping the congestion indication.
2 . The method of claim 1 , further comprising a step of maintaining a second congestion window of the application server.
3 . The method of claim 2 , further comprising a step of updating the second congestion window of the application server based on the step of determining.
4 . The method of claim 2 , wherein the step of determining is further based on a second congestion window of a second PDU session of the MA-PDU session, and wherein the second PDU session different than the first PDU session.
5 . The method of claim 4 , wherein the step of determining is further based the policy of the MA-PDU session being at least one of a replication policy and a splitting policy, and wherein a value of the second congestion window of the application server is greater than a largest value of the first congestion window of the first PDU session and the third congestion window of the second PDU session.
6 . The method of claim 4 , wherein the step of executing drops the congestion indication based the policy of the MA-PDU session being the replication policy.
7 . The method of claim 1 , wherein the step of determining is further based at least in part on the policy of the MA-PDU session being at least one of a switching policy and a steering policy based on a load indicating that the first PDU session is a single active PDU session of the MA-PDU session.
8 . The method of claim 1 , wherein the step of executing drops the congestion indication based a policy of the MA-PDU session including a replication policy.