Prioritization of paired versus un-paired spectrum selection in carrier aggregation scenarios
According to aspects herein, methods and systems for prioritizing paired versus un-paired spectrum selection in carrier aggregation scenarios are provided. More particularly, after determining a node comprises at least one time division duplex (TDD) layer and a frequency division duplex (FDD) layer, a FDD bandwidth is compared to a TDD effective bandwidth. The TDD effective bandwidth considers the slot pattern on the TDD layer. Based on the comparison and capabilities of user equipment (UE), a TDD layer or the FDD layer is selected for carrier aggregation. In this way, priority can be given to the TDD layer or the FDD layer to provide the highest effective bandwidth or to accommodate various load balancing scenarios.
1 . A method for prioritizing paired vs un-paired spectrum selection in carrier aggregation scenarios, the method comprising:
determining a node comprises at least one time division duplex (TDD) layer and at least one frequency division duplex (FDD) layer that are both available for carrier aggregation;
receiving, from a user equipment (UE), capabilities of the UE to support the at least one TDD layer and the at least one FDD layer;
determining, for the at least one TDD layer, a slot format defining proportions of downlink and uplink subframes within a frame;
determining a TDD effective bandwidth by multiplying an original bandwidth of the TDD layer by a ratio derived from the slot format corresponding to either a downlink carrier aggregation configuration or an uplink carrier aggregation configuration;
comparing a FDD bandwidth to a TDD effective bandwidth as part of selecting between a TDD/TDD carrier aggregation composition and a TDD/FDD carrier aggregation composition; and
based on the comparison and the capabilities of the UE, selecting the TDD layer or the FDD layer for inclusion in a carrier aggregation set and configuring the node to perform carrier aggregation using the selected layer.
2 . The method of claim 1 , further comprising determining capabilities of the UE.
3 . The method of claim 1 , further comprising determining a downlink slot format or an uplink slot format of the at least one TDD layer.
4 . The method of claim 3 , further comprising determining the node is configured with downlink standalone new radio carrier aggregation or downlink E-UTRAN New Radio—Dual Connectivity.
5 . The method of claim 4 , further comprising determining the TDD effective bandwidth of the at least one TDD layer by multiplying a TDD original bandwidth by the downlink slot format.
6 . The method of claim 5 , wherein the TDD layer of the at least one TDD layer is selected if the TDD effective bandwidth is greater than the FDD bandwidth and the capabilities of the UE support the TDD layer.
7 . The method of claim 5 , wherein the FDD layer is selected if the FDD bandwidth is greater than the TDD effective bandwidth and the capabilities of the UE support the FDD layer.
8 . The method of claim 3 , further comprising determining the node is configured with uplink standalone new radio carrier aggregation or uplink E-UTRAN New Radio—Dual Connectivity.
9 . The method of claim 8 , further comprising determining the TDD effective bandwidth of the at least one TDD layer by multiplying a TDD original bandwidth by the uplink slot format.
10 . The method of claim 9 , wherein the TDD layer of the at least one TDD layer is selected if the TDD effective bandwidth is greater than the FDD bandwidth and the UE supports the TDD layer.
11 . The method of claim 9 , wherein the FDD layer is selected if the FDD bandwidth is greater than the TDD effective bandwidth and the UE supports the FDD layer.
12 . One or more non-transitory computer-readable media having computer-executable instructions embodied thereon that, when executed by at least one computing device, cause the computing device to perform operations for prioritizing paired vs un-paired spectrum selection in carrier aggregation scenarios, the operations comprising:
determining a node comprises at least one time division duplex (TDD) layer and at least one frequency division duplex (FDD) layer for carrier aggregation;
receiving, from a user equipment (UE), capabilities of the UE to support the at least one TDD layer and the at least one FDD layer;
determining, for the TDD layer, a slot format defining downlink and uplink proportions within a frame;
determining a TDD effective bandwidth by multiplying an original bandwidth of the TDD layer by a ratio derived from the slot format corresponding to a selected carrier aggregation direction;
comparing a FDD bandwidth to a TDD effective bandwidth as part of selecting between a TDD/TDD carrier aggregation composition and a TDD/FDD carrier aggregation composition; and
based on the comparison and the capabilities of the UE, selecting the TDD layer or the FDD layer for inclusion in a carrier aggregation set and configuring the node to perform carrier aggregation using the selected layer.
13 . The one or more computer-readable media of claim 12 , further comprising:
determining capabilities of the UE; and
determining a downlink slot format or an uplink slot format of the at least one TDD layer.
14 . The one or more computer-readable media of claim 13 , further comprising:
determining the node is configured with downlink standalone new radio carrier aggregation or downlink E-UTRAN New Radio—Dual Connectivity; and
determining the TDD effective bandwidth of the at least one TDD layer by multiplying a TDD original bandwidth by the downlink slot format.
15 . The one or more computer-readable media of claim 14 , wherein the TDD layer of the at least one TDD layer is selected if the TDD effective bandwidth is greater than the FDD bandwidth and the capabilities of the UE support the TDD layer.
16 . The one or more computer-readable media of claim 14 , wherein the FDD layer is selected if the FDD bandwidth is greater than the TDD effective bandwidth and the capabilities of the UE support the FDD layer.
17 . The one or more computer-readable media of claim 13 , further comprising:
determining the node is configured with uplink standalone new radio carrier aggregation or uplink E-UTRAN New Radio—Dual Connectivity; and
determining the TDD effective bandwidth of the at least one TDD layer by multiplying a TDD original bandwidth by the uplink slot format.
18 . The one or more computer-readable media of claim 17 , wherein the TDD layer of the at least one TDD layer is selected if the TDD effective bandwidth is greater than the FDD bandwidth and the UE supports the TDD layer.
19 . The one or more computer-readable media of claim 17 , wherein the FDD layer is selected if the FDD bandwidth is greater than the TDD effective bandwidth and the UE supports the FDD layer.
20 . A system for prioritizing paired vs un-paired spectrum selection in carrier aggregation scenarios, the system comprising:
user equipment (UE); and
a node configured to wirelessly communicate with the UE, wherein the node is configured to:
provide at least one time division duplex (TDD) layer and at least one frequency division duplex (FDD) layer for carrier aggregation;
receive, from a user equipment (UE), capabilities of the UE to support the at least one TDD layer and the at least one FDD layer;
determine a slot format of the TDD layer defining downlink and uplink proportions within a frame;
determine a TDD effective bandwidth by multiplying an original bandwidth of the TDD layer by a ratio derived from the slot format corresponding to a selected carrier aggregation direction;
compare a FDD bandwidth to a TDD effective bandwidth for selecting between TDD/TDD and TDD/FDD carrier aggregation compositions; and
based on the comparison and the capabilities of the UE, select the TDD layer or the FDD layer for inclusion in a carrier aggregation set and configuring the node to perform carrier aggregation using the selected layer.