Dynamic control of measurement threshold based on inter-band dual-connectivity capability
A mechanism for controlling a measurement threshold used for triggering handover of a user equipment device (UE) when the UE is connected with a first access node, the first access node operating on a first frequency band and a second frequency band, and a second access operating on the second frequency band. A determination is made as to whether the UE supports inter-band dual-connectivity service with the UE being connected with the first access node on the first band and with the second access node on the second band. And responsive to the determination being that the UE does not support the inter-band dual-connectivity service, the measurement threshold is adjusted from a default level to an adjusted level to help facilitate handover of the UE from being connected with the first access node on the first band to being connected with the first access node instead on the second band.
1. A method for controlling a measurement threshold used for triggering handover of a user equipment device (UE) when the UE is connected with a first access node, wherein the first access node provides service on a first frequency band and on a second frequency band, and wherein a second access node provides service on the second frequency band, the method comprising:
making a determination of whether the UE supports inter-band dual-connectivity service in which the UE would be concurrently connected with the first access node on the first frequency band and with the second access node on the second frequency band; and
responsive to the determination being that the UE does not support the inter-band dual-connectivity service, adjusting the measurement threshold from a default level to an adjusted level to help facilitate handover of the UE from being connected with the first access node on the first frequency band to being connected with the first access node instead on the second frequency band.
2. The method of claim 1 , wherein the method is carried out by the first access node.
3. The method of claim 1 , wherein the measurement threshold is a threshold-low coverage strength from the first access node on the first frequency band, and wherein the adjusted level is higher than the default level.
4. The method of claim 1 , wherein the measurement threshold is a threshold-high coverage strength from the first access node on the second frequency band, and wherein the adjusted level is lower than the default level.
5. The method of claim 1 , wherein making the determination of whether the UE supports the inter-band dual-connectivity service comprises, based on capability data of the UE, (i) determining that the UE supports dual-connectivity service and (ii) determining whether the UE supports inter-band dual-connectivity service.
6. The method of claim 1 , wherein the making of the determination of whether the UE supports the inter-band dual-connectivity service occurs responsive to at least determining that the first frequency band on which the UE is connected with the first access node is different than the second frequency band on which the second access node provides service.
7. The method of claim 1 ,
wherein the first and second access nodes are collocated, and
wherein the inter-band dual-connectivity service involves the UE being served by the first access node in accordance with a first radio access technology (RAT) concurrently with the UE being served by the second access node in accordance with a second RAT.
8. The method of claim 7 , wherein the first RAT is 4G LTE, the second RAT is 5G NR, and the dual-connectivity is EUTRA-NR Dual Connectivity (EN-DC).
9. A method to facilitate dual-connectivity service of a user equipment device (UE), the method comprising:
making a determination of whether the UE supports inter-band dual-connectivity service in which the UE would be served by a first access node on a first frequency band concurrently with the UE being served by a second access node on a second frequency band; and
based on the determination, controlling what value of a measurement threshold to apply for controlling whether and when the UE should be handed over from being connected with the first access node on the first frequency band to being connected with the first access node instead on the second frequency band, including:
(i) if the determination is that the UE supports the inter-band dual-connectivity service, then applying a default value of the measurement threshold to control whether and when the UE should be handed over from being connected with the first access node on the first frequency band to being connected with the first access node instead on the second frequency band, and
(ii) if the determination is that the UE does not support the inter-band dual-connectivity service, then instead applying an adjusted value of the measurement threshold to control whether and when the UE should be handed over from being connected with the first access node on the first frequency band to being connected with the first access node instead on the second frequency band.
10. The method of claim 9 , wherein the method is carried out by the first access node.
11. The method of claim 9 , wherein the measurement threshold is a threshold-low coverage strength from the first access node on the first frequency band, and wherein the adjusted value is higher than the default value.
12. The method of claim 9 , wherein the measurement threshold is a threshold-high coverage strength from the first access node on the second frequency band, and wherein the adjusted value is lower than the default value.
13. The method of claim 9 , wherein making the determination of whether the UE supports the inter-band dual-connectivity service comprises, based on capability data of the UE, (i) determining that the UE supports dual-connectivity service and (ii) determining whether the UE supports inter-band dual-connectivity service.
14. A first access node configured to control a measurement threshold used for triggering handover of a user equipment device (UE) when the UE is connected with a first access node in a communication system in which the first access node provides service on a first frequency band and on a second frequency band and in which a second access node provides service on the second frequency band, the first access node comprising:
a wireless communication interface through which the first access node is configured to provide the service on the first frequency band and on the second frequency band;
a network communication interface though which the first access node is configured to communicate on a core network; and
a controller for controlling the measurement threshold by carrying out operations including:
making a determination of whether the UE supports inter-band dual-connectivity service in which the UE would be concurrently connected with the first access node on the first frequency band and the second access node on the second frequency band, and
responsive to the determination being that the UE does not support the inter-band dual-connectivity service, adjusting the measurement threshold from a default level to an adjusted level to help facilitate handover of the UE from being connected with the first access node on the first frequency band to being connected with the first access node instead on the second frequency band.
15. The first access node of claim 14 , wherein the controller comprises a processing unit, non-transitory data storage, and program instructions stored in the non-transitory data storage and executable by the processing unit to carry out the operations.
16. The first access node of claim 14 , wherein the measurement threshold is a threshold-low coverage strength from the first access node on the first frequency band, and wherein the adjusted level is higher than the default level.
17. The first access node of claim 14 , wherein the measurement threshold is a threshold-high coverage strength from the first access node on the second frequency band, and wherein the adjusted level is lower than the default level.
18. The first access node of claim 14 , wherein making the determination of whether the UE supports the inter-band dual-connectivity service comprises, based on capability data of the UE, (i) determining that the UE supports dual-connectivity service and (ii) determining whether the UE supports inter-band dual-connectivity service.
19. The first access node of claim 14 , wherein the making of the determination of whether the UE supports the inter-band dual-connectivity service occurs responsive to at least the first access node determining that the first frequency band on which the UE is connected with the first access node is different than the second frequency band on which the second access node provides service.
20. The first access node of claim 14 , wherein the inter-band dual-connectivity service involves the UE being served by the first access node in accordance with a first radio access technology (RAT) concurrently with the UE being served by the second access node in accordance with a second RAT.