Systems and methods for handling protocol data unit sets
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 processing a protocol data unit (PDU) set for a data network, comprising the steps of:
receiving a first PDU packet of the PDU set, wherein the first PDU packet includes a first congestion flag;
receiving, subsequent to reception of the first PDU packet, a second PDU packet of the PDU set, wherein the second PDU packet includes a second congestion flag different from the first congestion flag;
determining, after receiving the first and second PDU packets, a congestion status of the data network for the PDU set;
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
transmitting the first PDU packet and the controlled second PDU packet to a destination receiver of the data network.
2. The method of claim 1 , wherein the steps of receiving the first and second PDU packets are performed by at least one of an access node, a base station, a gateway function, and a user plane function (UPF).
3. The method of claim 1 , wherein the step of controlling comprises a substep of setting (i) a first explicit congestion notification (ECN) state on the first PDU packet, and (ii) a second ECN state on the second PDU packet to match the first ECN state.
4. The method of claim 1 , wherein the step of controlling comprises a substep of selecting, from a plurality of queues available to the first and second PDU packets, a first queue for the PDU set including both of the first and second PDU packets.
5. The method of claim 1 , wherein the step of controlling comprises a substep of changing a first internet protocol (IP) header of the first PDU packet to a first value.
6. The method of claim 5 , further comprising a substep of changing a second IP header of the second PDU packet to a second value equal to the first value.
7. The method of claim 1 , wherein the step of controlling comprises a substep of setting (i) a first congestion level on the first PDU packet, and (ii) a second congestion level on the second PDU packet to match the first congestion level.
8. A method of processing a protocol data unit (PDU) set for a data network, comprising the steps of:
receiving a first PDU packet of the PDU set, wherein the first PDU packet includes a first congestion flag;
receiving, subsequent to reception of the first PDU packet, a second PDU packet of the PDU set, wherein the second PDU packet includes a second congestion flag different from the first congestion flag;
identifying that the first PDU packet is the first PDU packet of the PDU set in time;
determining a congestion status for the PDU set based on the received first PDU packet;
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
transmitting the first PDU packet and the controlled second PDU packet to a destination receiver of the data network.
9. The method of claim 8 , wherein the steps of receiving the first and second PDU packets are performed by at least one of an access node, a base station, a gateway function, and a user plane function (UPF).
10. The method of claim 8 , wherein the step of controlling comprises a substep of setting an explicit congestion notification (ECN) state on the second PDU packet to match an ECN state of the first PDU packet.
11. The method of claim 10 , further comprising a substep of setting an ECN state of all subsequent PDU packets of the PDU set to match the ECN state of the first PDU packet.
12. The method of claim 8 , wherein the step of controlling comprises a substep of selecting, from a plurality of queues available to the first and second PDU packets, a first queue for the PDU set based on the first PDU packet.
13. The method of claim 8 , wherein the step of controlling comprises a substep of changing at least one bit of an internet protocol (IP) header of the second PDU packet to match a respective IP header bit of the first PDU packet.
14. The method of claim 13 , further comprising a substep of managing the respective IP header bits of all subsequent PDU packets of the PDU set to match the respective IP header bit of the first PDU packet.
15. The method of claim 8 , wherein the step of controlling comprises a substep of setting a congestion level on the second PDU packet to match a congestion level on the first PDU packet.
16. The method of claim 15 , further comprising a substep of setting the congestion level of all subsequent PDU packets of the PDU set to match the congestion level on the first PDU packet.
17. An access node for a data network, comprising:
a processor; and
a memory having computer-executable instructions stored therein, which, when executed by the processor, cause the access node to:
receive (i) a first protocol data unit (PDU) packet of a first PDU set, and (ii) a second PDU packet of the first PDU set subsequent to reception of the first PDU packet, wherein the first PDU packet includes a first congestion flag, and wherein the second PDU packet includes a second congestion flag different from the first congestion flag;
establish a distinct PDU session for the first PDU set;
determine a congestion status of the data network for the first PDU set;
control, 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
transmit the first PDU packet and the controlled second PDU packet to a destination receiver of the data network.
18. The access node of claim 17 , further comprising at least one of an access node, a base station, a gateway function, and a user plane function (UPF).
19. The access node of claim 17 , further comprising a classification module configured to classify, for the PDU set, at least one of a protocol, a priority, and a traffic queue.
20. The access node of claim 17 , further comprising a scheduling unit configured to schedule all PDU packets of the PDU set to have the same handling state as the first and second PDU packets.