Systems and methods for intelligent differentiated retransmissions
Systems and methods described herein provide for intelligent differentiated retransmissions in Radio Access Networks (RANs), such as Fifth Generation New Radio (5G-NR) networks, to provide consistent low latency for different service requirements. A network device determines if consistent low latency is required for a communication session requested by a user equipment (UE) device. The network device selects, based on the determining, retransmission settings for the communication session and sends the retransmission settings to an access station of a radio access network (RAN).
1. A method, comprising:
determining, by a network device, if consistent low latency is required for a communication session requested by a user equipment (UE) device;
selecting, by the network device and based on the determining, retransmission settings for the communication session, wherein, when it is determined that consistent low latency is not required for the communication session, the retransmission settings include Packet Data Convergence Protocol (PDCP) instructions for a PDCP layer; and
sending, by the network device and to an access station of a radio access network (RAN), the retransmission settings.
2. The method of claim 1 , wherein, when consistent low latency is required for the communication session, the retransmission settings include:
a maximal hybrid automatic repeat request (HARQ) value for the communication session.
3. The method of claim 1 , wherein the retransmission settings include slot aggregation instructions for a physical layer, and
wherein sending the retransmission settings further includes sending the slot aggregation instructions to a distributed unit (DU) of the access station.
4. The method of claim 1 ,
wherein sending the retransmission settings further includes sending the PDCP instructions to a control unit (CU) of the access station.
5. The method of claim 1 , wherein selecting the retransmission settings includes:
selecting the retransmission settings based on a frequency band for the communication session.
6. The method of claim 1 , wherein selecting the retransmission settings includes:
selecting the retransmission settings based on historical data for a location of the UE device.
7. The method of claim 1 , wherein the network device includes a RAN intelligent controller.
8. The method of claim 1 , further comprising:
receiving, from a device in a core network, a service level indication, wherein the selecting is based on the service level indication.
9. The method of claim 8 , wherein the service level indication includes:
a network slice identifier,
a quality of service (QoS) identifier;
a flow identifier; or
a user identifier.
10. A network device, comprising:
one or more processors configured to:
determine if consistent low latency is required for a communication session requested by a user equipment (UE) device;
select, based on the determining, retransmission settings for the communication session, wherein, when it is determined that consistent low latency is not required for the communication session, the retransmission settings include Packet Data Convergence Protocol (PDCP) instructions for a PDCP layer; and
send, to an access station of a radio access network (RAN), the retransmission settings.
11. The network device of claim 10 , wherein the network device includes a RAN intelligent controller.
12. The network device of claim 10 , wherein, when consistent low latency is required for the communication session, the retransmission settings include:
a maximal hybrid automatic repeat request (HARQ) value for the communication session.
13. The network device of claim 10 , wherein the retransmission settings include slot aggregation instructions for a physical layer.
14. The network device of claim 10 , wherein sending the retransmission settings further includes sending the PDCP instructions to a control unit (CU) of the access station.
15. The network device of claim 10 , wherein, when selecting the retransmission settings, the one or more processers are further configured to:
select the retransmission settings based on a frequency band for the communication session, or
select the retransmission settings based on historical data for a location of the UE device.
16. The network device of claim 10 , wherein the one or more processers are further configured to:
receive, from a device in a core network, a service level indication; and
identify a multi-access edge compute (MEC) resource for the communication session, wherein the selecting is based on the service level indication and a capacity of the MEC resource.
17. A non-transitory computer-readable medium containing instructions executable by at least one processor, the computer-readable medium comprising one or more instructions to cause the at least one processor to:
determine if consistent low latency is required for a communication session requested by a user equipment (UE) device;
select, based on the determining, retransmission settings for the communication session, wherein, when it is determined that consistent low latency is not required for the communication session, the retransmission settings include Packet Data Convergence Protocol (PDCP) instructions for a PDCP layer; and
send, to an access station of a radio access network (RAN), the retransmission settings.
18. The non-transitory computer-readable medium of claim 17 , wherein, when consistent low latency is required for the communication session, the retransmission settings include:
a maximal hybrid automatic repeat request (HARQ) value for the communication session.
19. The non-transitory computer-readable medium of claim 18 , wherein the retransmission settings further include slot aggregation instructions for a physical layer.
20. The non-transitory computer-readable medium of claim 17 , wherein sending the retransmission settings further includes sending the PDCP instructions to a control unit (CU) of the access station.