UE capability coordination for NE-DC
Embodiments described herein relate to methods and apparatuses for signalling band combinations allowed to be used by a second base station. A method performed by a first base station, wherein the first base station is acting as a Master Node in Dual Connectivity, wherein there exists a first band combination list and a second band combination list, and wherein the first band combination list and the second band combination list each contain supported band combinations, comprises: signalling to a second base station to indicate band combinations allowed to be used by the second base station, wherein the second base station is acting as a Secondary Node in Dual Connectivity, wherein the indicated band combinations comprise band combinations from the first band combination list and/or the second band combination list.
1 . A method performed by a first base station, wherein the first base station is acting as a Master Node in Dual Connectivity, wherein a second base station is acting as a Secondary Node in Dual Connectivity, and, wherein the first base station and the second base station are acting in New Radio (NR) Evolved Universal Terrestrial Radio Access (E-UTRA) Dual Connectivity (NE-DC), wherein there exist a first band combination list and a second band combination list which are visible in the first and second base station, and wherein the first band combination list and the second band combination list each contain supported band combinations, wherein the first band combination list comprises a list of band combinations supported by a wireless device for NE-DC and for E-UTRA NR Dual Connectivity (EN-DC), and wherein the second band combination list comprises a list of band combinations supported by the wireless device for NE-DC only, the method comprising:
transmitting signaling to the second base station, the signaling being configured to indicate band combinations allowed to be used by the second base station,
characterized in that the indicated band combinations comprise band combinations from the first band combination list and the second band combination list.
2 . The method of claim 1 , wherein the supported band combinations are reported to said first base station by a wireless device.
3 . The method of claim 1 , comprising referring in said signaling to any indicated band combination from the first band combination list by means of an index identifying said indicated band combination within the first band combination list.
4 . The method of claim 3 wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list.
5 . The method of claim 3 , comprising referring in said signaling to any indicated band combination from the second band combination list by means of an index corresponding to a sum of (a) an index identifying said indicated band combination within the second band combination list, and (b) a number of band combinations in the first band combination list.
6 . The method of claim 5 , wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
7 . The method of claim 1 , comprising referring in said signaling to any indicated band combination from the first band combination list by means of an index selected from a first list of indexes identifying said indicated band combination within the first band combination list, and referring in said signaling to any indicated band combination from the second band combination list by means of an index selected from a second list of indexes identifying said indicated band combination within the second band combination list.
8 . The method of claim 7 , wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list, and wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
9 . The method of claim 7 , comprising indicating that no band combination from the first band combination list is allowed to be used by the second base station by omitting the indexes of the first list of indexes from said signaling.
10 . The method of claim 7 , comprising indicating that no band combination from the second band combination list is allowed to be used by the second base station by omitting the indexes of the second list of indexes in said signaling.
11 . The method of claim 1 , comprising receiving signaling from the second base station, wherein said received signaling indicates a band combination selected by the second base station from among said indicated band combinations allowed to be used by the second base station.
12 . The method of claim 1 , comprising receiving signaling from the second base station, wherein said received signaling indicates a band combination requested by the second base station that was not among said indicated band combinations allowed to be used by the second base station.
13 . A method performed by a second base station, wherein a first base station is acting as a Master Node in Dual Connectivity, wherein the second base station is acting as a Secondary Node in Dual Connectivity, wherein the first base station and the second base station are acting in New Radio (NR) Evolved Universal Terrestrial Radio Access (E-UTRA) Dual Connectivity (NE-DC), wherein there exist a first band combination list and a second band combination list, which are visible in the first and second base station, and wherein the first band combination list and the second band combination list each contain supported band combinations, wherein the first band combination list comprises a list of band combinations supported by a wireless device for NE-DC and for E-UTRA NR Dual Connectivity (EN-DC), and wherein the second band combination list comprises a list of band combinations supported by the wireless device for NE-DC only, the method comprising:
receiving signaling from the first base station, the signaling being configured to indicate band combinations allowed to be used by the second base station,
characterized in that the indicated band combinations comprise band combinations from the first band combination list and the second band combination list.
14 . The method of claim 13 , wherein said signaling refers to any indicated band combination from the first band combination list by means of an index identifying said indicated band combination within the first band combination list.
15 . The method of claim 14 , wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list.
16 . The method of claim 14 , wherein said signaling refers to any indicated band combination from the second band combination list by means of an index corresponding to a sum of (a) an index identifying said indicated band combination within the second band combination list, and (b) a number of band combinations in the first band combination list.
17 . The method of claim 16 , wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
18 . The method of claim 13 , wherein said signaling refers to any indicated band combination from the first band combination list by means of an index selected from a first list of indexes, identifying said indicated band combination within the first band combination list, and refers to any indicated band combination from the second band combination list by means of an index selected from a second list of indexes, identifying said indicated band combination within the second band combination list.
19 . The method of claim 18 , wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list, and wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
20 . The method of claim 18 , comprising determining that no band combination from the first band combination list is allowed to be used by the second base station if the indexes of the first list of indexes are omitted from said signaling.
21 . The method of claim 20 , comprising determining that no band combination from the second band combination list is allowed to be used by the second base station if the indexes of the second list of indexes are omitted from said signaling.
22 . The method of claim 21 , wherein said selected band combination is selected from among said indicated band combinations allowed to be used by the second base station.
23 . The method of claim 21 , wherein said selected band combination was not among said indicated band combinations allowed to be used by the second base station.
24 . The method of claim 13 , comprising selecting a band combination, and transmitting signaling to the first base station, wherein said signaling indicates the band combination selected by the second base station.
25 . The method of claim 24 , wherein said signaling transmitted to the first base station refers to any indicated band combination from the first band combination list by means of an index identifying said indicated band combination within the first band combination list.
26 . The method of claim 25 wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list.
27 . The method of claim 24 , wherein said signaling transmitted to the first base station refers to any indicated band combination from the second band combination list by means of an index corresponding to a sum of (a) an index identifying said indicated band combination within the second band combination list, and (b) a number of band combinations in the first band combination list.
28 . The method of claim 27 , wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
29 . The method of claim 24 , wherein said signaling transmitted to the first base station refers to any indicated band combination from the first band combination list by means of an index selected from a first list of indexes identifying said indicated band combination within the first band combination list, and refers to any indicated band combination from the second band combination list by means of an index selected from a second list of indexes identifying said indicated band combination within the second band combination list.
30 . The method of claim 29 , wherein said index identifying said indicated band combination within the first band combination list corresponds to a position of said indicated band combination within the first band combination list, and wherein said index identifying said indicated band combination within the second band combination list corresponds to a position of said indicated band combination within the second band combination list.
31 . A first base station acting as a Master Node in Dual Connectivity, wherein a second base station is acting as a Secondary Node in Dual Connectivity, wherein the first base station and the second base station are acting in New Radio (NR) Evolved Universal Terrestrial Radio Access (E-UTRA) Dual Connectivity (NE-DC), and wherein there exists a first band combination list and a second band combination list which are visible in the first and second base station, and wherein the first band combination list and the second band combination list each contain supported band combinations, wherein the first band combination list comprises a list of band combinations supported by a wireless device for NE-DC and for E-UTRA NR Dual Connectivity (EN-DC), and wherein the second band combination list comprises a list of band combinations supported by the wireless device for NE-DC only, the first base station comprising radio circuitry configured to communicate with one or more wireless devices;
interface circuitry configured to communicate with one or more other base stations; and
processing circuitry configured to cause the first base station to:
signal to the second base station to indicate band combinations allowed to be used by the second base station, wherein the second base station is acting as a Secondary Node in Dual Connectivity,
wherein the indicated band combinations comprise band combinations from the first band combination list and the second band combination list.
32 . A second base station acting as a Secondary Node in Dual Connectivity, wherein a first base station is acting as a Master Node in Dual Connectivity, wherein the first base station and the second base station are acting in New Radio (NR) Evolved Universal Terrestrial Radio Access (E-UTRA) Dual Connectivity (NE-DC), and wherein there exists a first band combination list and a second band combination list which are visible in the first and second base station, and wherein the first band combination list and the second band combination list each contain supported band combinations, wherein the first band combination list comprises a list of band combinations supported by a wireless device for NE-DC and for E-UTRA NR Dual Connectivity (EN-DC), and wherein the second band combination list comprises a list of band combinations supported by the wireless device for NE-DC only, the second base station comprising
radio circuitry configured to communicate with one or more wireless devices;
interface circuitry configured to communicate with one or more other base stations; and
processing circuitry configured to cause the second base station to:
receive signaling from the first base station to indicate band combinations allowed to be used by the second base station,
characterized in that the indicated band combinations comprise band combinations from the first band combination list and the second band combination list.