Techniques for connected state mobility in a service-based wireless system
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a measurement configuration including trigger conditions for performance of handover procedures within a service-based wireless system. The UE may transmit a message indicating a satisfaction of a trigger condition to a source network entity, a mobility service offered by a service-based network, or both. After performance of a handover decision by the source network entity, the mobility service, or both, the mobility service may select a target network entity for the handover procedure. The mobility service may select a target network entity that supports at least one active core network service at the UE. The UE may then receive a handover command from the mobility service, and may perform a handover procedure to the target network entity.
1. A method for wireless communication at a user equipment (UE), comprising:
communicating a plurality of service messages with a first distributed unit, the plurality of service messages associated with a plurality of core network services that are offered by a service-based network via one or more application programming interfaces and that are active at the UE;
receiving, from a core network mobility service of the plurality of core network services and via the first distributed unit, a measurement configuration indicating one or more trigger conditions associated with a handover procedure at the UE;
transmitting, to the first distributed unit for relay to the core network mobility service, a second message indicating a satisfaction of a trigger condition of the one or more trigger conditions;
receiving a handover command from the core network mobility service via the first distributed unit based at least in part on the satisfaction of the trigger condition, the handover command indicating a second distributed unit that supports at least one core network service of the plurality of core network services that are active at the UE; and
communicating with the second distributed unit based at least in part on receiving the handover command.
2. The method of claim 1 , further comprising:
transmitting capability information associated with the UE to the first distributed unit, the core network mobility service, an additional core network service of the plurality of core network services, or any combination thereof, wherein receiving the handover command is based at least in part on the capability information.
3. The method of claim 1 , further comprising:
receiving, via the handover command, a cell identifier associated with a serving cell supported by the second distributed unit and a set of communication parameters for communicating with the serving cell, wherein communicating with the second distributed unit is based at least in part on the cell identifier and the set of communication parameters.
4. The method of claim 1 , further comprising:
transmitting, to a network address associated with the core network mobility service, a service request for establishing service with the core network mobility service; and
receiving control signaling indicating a service context for communicating with the core network mobility service based at least in part on the service request, wherein transmitting the second message, receiving the handover command, or both, is based at least in part on the service context.
5. The method of claim 1 , further comprising:
performing measurements on signals received from the first distributed unit and one or more candidate distributed units including the second distributed unit, wherein the measurements are performed in accordance with the measurement configuration, and wherein transmitting the second message is based at least in part on performing the measurements.
6. A method for wireless communication at a core network mobility service, comprising:
receiving, from a first distributed unit configured to communicate with a user equipment (UE) and based at least in part on one or more application programming interfaces, a message associated with a satisfaction of a trigger condition for a handover procedure at the UE;
selecting, based at least in part on the message, a second distributed unit from a plurality of candidate distributed units based at least in part on the second distributed unit being configured to support at least one core network service that is active at the UE of a plurality of core network services of a service-based network; and
transmitting, to the first distributed unit for relay to the UE and based at least in part on selecting the second distributed unit, a handover command indicating the second distributed unit and an instruction to perform the handover procedure from the first distributed unit to the second distributed unit.
7. The method of claim 6 , further comprising:
transmitting a handover request to the second distributed unit based at least in part on the message; and
receiving an acknowledgment message from the second distributed unit based at least in part on the handover request, wherein transmitting the handover command is based at least in part on the acknowledgment message.
8. The method of claim 7 , further comprising:
transmitting, via the handover request, an indication of the plurality of core network services that are active at the UE, wherein the acknowledgment message is based at least in part on the plurality of core network services that are active at the UE.
9. The method of claim 7 , further comprising:
receiving, via the acknowledgment message, an indication of the at least one core network service supported by the second distributed unit, wherein transmitting the handover command is based at least in part on receiving the indication of the at least one core network service.
10. The method of claim 6 , further comprising:
receiving capability information associated with the UE, wherein selecting the second distributed unit from the plurality of candidate distributed units is based at least in part on the capability information.
11. The method of claim 10 , wherein the capability information is received from a core network capability service included within the plurality of core network services.
12. The method of claim 6 , wherein selecting the second distributed unit from the plurality of candidate distributed units is based at least in part on a mobility history of the UE, a traffic load associated with the second distributed unit, or both.
13. The method of claim 6 , further comprising:
receiving, via the message, an indication of the plurality of candidate distributed units, wherein selecting the second distributed unit is based at least in part on receiving the indication of the plurality of candidate distributed units.
14. The method of claim 6 , wherein selecting the second distributed unit comprises:
selecting a serving cell supported by the second distributed unit, wherein the handover command comprises a cell identifier associated with the selected serving cell.
15. The method of claim 6 , further comprising:
receiving, from the second distributed unit, a second message indicating a completion of the handover procedure; and
communicating with the UE via the second distributed unit based at least in part on the second message.
16. The method of claim 6 , further comprising:
transmitting, to the first distributed unit for relay to the UE, a measurement configuration indicating one or more trigger conditions including the trigger condition, wherein receiving the message is based at least in part on the measurement configuration.
17. A method for wireless communication at a first distributed unit, comprising:
communicating, using one or more application programming interfaces, a plurality of service messages between a user equipment (UE) and a plurality of core network services of a service-based network that are active at the UE;
transmitting, to a core network mobility service of the plurality of core network services, a message associated with a satisfaction of a trigger condition for a handover procedure at the UE;
receiving, from the core network mobility service based at least in part on the message, a handover command indicating a second distributed unit that supports at least one core network service of a plurality of core network services that are active at the UE; and
transmitting the handover command to the UE, the handover command comprising an instruction for the UE to perform the handover procedure from the first distributed unit to the second distributed unit.
18. The method of claim 17 , further comprising:
transmitting capability information associated with the UE to the core network mobility service, an additional core network service of the plurality of core network services, or both, wherein receiving the handover command is based at least in part on the capability information.
19. The method of claim 17 , further comprising:
transmitting, to the core network mobility service, an additional core network service of the plurality of core network services, or both, an indication of the plurality of core network services that are active at the UE, wherein receiving the handover command is based at least in part on transmitting the indication of the plurality of core network services that are active at the UE.
20. The method of claim 17 , further comprising:
establishing a communication tunnel with the second distributed unit based at least in part on the handover command;
receiving a second message for the UE prior to a completion of the handover procedure; and
transmitting one or more packets to the second distributed unit via the communication tunnel for relay to the UE based at least in part on receiving the second message.
21. The method of claim 17 , further comprising:
transmitting, via the message, an indication of a plurality of candidate distributed units including the second distributed unit and one or more cell identifiers associated with one or more serving cells supported by the second distributed unit, wherein receiving the handover command is based at least in part on transmitting the indication of the plurality of candidate distributed units.
22. The method of claim 17 , further comprising:
receiving, via the handover command, an indication of the at least one core network service supported by the second distributed unit; and
transmitting, to the UE via the handover command, the indication of the at least one core network service supported by the second distributed unit.
23. The method of claim 17 , further comprising:
receiving, from the core network mobility service, a measurement configuration indicating one or more trigger conditions including the trigger condition; and
transmitting the measurement configuration to the UE, wherein transmitting the message associated with the satisfaction of the trigger condition is based at least in part on the measurement configuration.
24. The method of claim 23 , further comprising:
receiving, from the UE based at least in part on the measurement configuration, a measurement report, a second message indicating the trigger condition, or both, wherein transmitting the message associated with the satisfaction of the trigger condition is based at least in part on receiving the measurement report, the second message indicating the trigger condition, or both.
25. An apparatus for wireless communication at a user equipment (UE), comprising:
one or more processors;
one or more memories coupled with the one or more processors; and
instructions stored in the one or more memories memory and executable by the one or more processors to cause the apparatus to:
communicate a plurality of service messages with a first distributed unit, the plurality of service messages associated with a plurality of core network services that are offered by a service-based network via one or more application programming interfaces and that are active at the UE;
receive, from a core network mobility service of the plurality of core network services and via the first distributed unit, a measurement configuration indicating one or more trigger conditions associated with a handover procedure at the UE;
transmit, to the first distributed unit for relay to the core network mobility service, a second message indicating a satisfaction of a trigger condition of the one or more trigger conditions;
receive a handover command from the core network mobility service via the first distributed unit based at least in part on the satisfaction of the trigger condition, the handover command indicating a second distributed unit that supports at least one core network service of the plurality of core network services that are active at the UE; and
communicate with the second distributed unit based at least in part on receiving the handover command.
26. The apparatus of claim 25 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
transmit capability information associated with the UE to the first distributed unit, the core network mobility service, an additional core network service of the plurality of core network services, or any combination thereof, wherein receiving the handover command is based at least in part on the capability information.
27. The apparatus of claim 25 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
receive, via the handover command, a cell identifier associated with a serving cell supported by the second distributed unit and a set of communication parameters for communicating with the serving cell, wherein communicating with the second distributed unit is based at least in part on the cell identifier and the set of communication parameters.
28. The apparatus of claim 25 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
transmit, to a network address associated with the core network mobility service, a service request for establishing service with the core network mobility service; and
receive control signaling indicating a service context for communicating with the core network mobility service based at least in part on the service request, wherein transmitting the second message, receiving the handover command, or both, is based at least in part on the service context.
29. The apparatus of claim 25 , wherein the instructions are further executable by the one or more processors to cause the apparatus to:
perform measurements on signals received from the first distributed unit and one or more candidate distributed units including the second distributed unit, wherein the measurements are performed in accordance with the measurement configuration, and wherein transmitting the second message is based at least in part on performing the measurements.