US-12627362-B2 - Apparatus and method for inter-cell beam management

Abstract

Various example embodiments relate to apparatuses and methods for inter-cell beam management. An apparatus may be configured to support a first control resource set and a second control resource set for a serving cell, receive a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell, and ignore, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set is configured to follow a transmission configuration indicator state indication for the serving cell.

Inventors

• Timo KOSKELA
• Sami-Jukka Hakola
• Keeth Saliya Jayasinghe LADDU
• Juha Pekka Karjalainen
• Mihai Enescu

Assignees

• NOKIA TECHNOLOGIES OY

Dates

Publication Date

20260512

Application Date

20221223

Priority Date

20220105

Claims (20)

1. 1 . An apparatus comprising at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to: support a first control resource set of a first control resource set type and a second control resource set of a second control resource set type for a serving cell; receive a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell; and ignore, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set of the second control resource set type is configured to follow a transmission configuration indicator state indication for the serving cell.
2. 2 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: apply a previously indicated transmission configuration indicator state for the serving cell for the second control resource set.
3. 3 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: apply a synchronization signal block that is a quasi-colocation source reference signal of a previously indicated transmission configuration indicator state as the quasi-colocation source reference signal for the second control resource set.
4. 4 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: apply a default transmission configuration indicator state for the second control resource set, the default transmission configuration indicator state being selected from one or more transmission configuration indicator states for the serving cell configured and/or activated for the apparatus.
5. 5 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: monitor on the serving cell for a transmission configuration indicator state indication designated for the second control resource set.
6. 6 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: receive a transmission configuration indicator state indication for the second control resource set; and apply the received transmission configuration indicator state indication for the second control resource set to one or more control resource sets of the second control resource set type including the second control resource set.
7. 7 . The apparatus of claim 1 , wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to: receive a transmission configuration indicator state indication for the second control resource set, the second control resource set being associated with a common control resource set search space; and apply the received transmission configuration indicator state indication for the second control resource set to the common control resource set search space for one or more control resource sets including the second control resource set.
8. 8 . The apparatus of claim 1 , wherein a type of the first control resource set of the first control resource set type is associated with an apparatus-specific control resource set search space, and a type of the second control resource set of the second control resource set type is associated with a common control resource set search space.
9. 9 . A method comprising, by a terminal device: supporting a first control resource set of a first control resource set type and a second control resource set of a second control resource set type for a serving cell; receiving a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell; and ignoring, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set of the second control resource set type is configured to follow a transmission configuration indicator state indication for the serving cell.
10. 10 . The method of claim 9 , further comprising, by the terminal device: applying a previously indicated transmission configuration indicator state for the serving cell for the second control resource set.
11. 11 . The method of claim 9 , further comprising, by the terminal device: applying a synchronization signal block that is a quasi-colocation source reference signal of a previously indicated transmission configuration indicator state as the quasi-colocation source reference signal for the second control resource set.
12. 12 . The method of claim 9 , further comprising, by the terminal device: applying a default transmission configuration indicator state for the second control resource set, the default transmission configuration indicator state being selected from one or more transmission configuration indicator states for the serving cell configured and/or activated for the terminal device.
13. 13 . The method of claim 9 , further comprising, by the terminal device: monitoring on the serving cell for a transmission configuration indicator state indication designated for the second control resource set.
14. 14 . The method of claim 9 , further comprising, by the terminal device: receiving a transmission configuration indicator state indication for the second control resource set; and applying the received transmission configuration indicator state indication for the second control resource set to one or more control resource sets of the second control resource set type including the second control resource set.
15. 15 . The method of claim 9 , further comprising, by the terminal device: receiving a transmission configuration indicator state indication for the second control resource set, the second control resource set being associated with a common control resource set search space; and applying the received transmission configuration indicator state indication for the second control resource set to the common control resource set search space for one or more control resource sets including the second control resource set.
16. 16 . The method of claim 9 , wherein the first control resource set of the first control resource set type is associated with an apparatus-specific control resource set search space, and the second control resource set of the second control resource set type is associated with a common control resource set search space.
17. 17 . A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least the following: supporting at an apparatus a first control resource set of a first control resource set type and a second control resource set of a second control resource set type for a serving cell; receiving, at the apparatus, a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell; and ignoring, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set of the second control resource set type is configured to follow a transmission configuration indicator state indication for the serving cell.
18. 18 . The non-transitory computer readable medium of claim 17 , wherein the program instructions, when executed by an apparatus, further cause the apparatus at least to: apply a previously indicated transmission configuration indicator state for the serving cell for the second control resource set.
19. 19 . The non-transitory computer readable medium of claim 17 , wherein the program instructions, when executed by an apparatus, further cause the apparatus at least to: apply a synchronization signal block that is a quasi-colocation source reference signal of a previously indicated transmission configuration indicator state as the quasi-colocation source reference signal for the second control resource set.
20. 20 . The non-transitory computer readable medium of claim 17 , wherein the program instructions, when executed by an apparatus, further cause the apparatus at least to: apply a default transmission configuration indicator state for the second control resource set, the default transmission configuration indicator state being selected from one or more transmission configuration indicator states for the serving cell configured and/or activated for the apparatus.

Description

RELATED APPLICATION This application was originally filed as PCT Application No. PCT/EP2022/087753 on Dec. 23, 2022, which claims priority from Finnish Application No. 20225006, filed on Jan. 5, 2022, each of which is incorporated herein by reference in its entirety. TECHNICAL FIELD Various example embodiments described herein generally relate to communication technologies, and more particularly, to apparatuses and methods supporting inter-cell beam management. BACKGROUND In 5G New Radio (NR), further enhancement of multiple input multiple output (MIMO) includes support for inter-cell beam management. With inter-cell beam management, a user equipment (UE) can be configured to communicate with one or more additional cells with physical cell identities (PCIs) different from the serving cell, while the serving cell does not change. SUMMARY A brief summary of exemplary embodiments is provided below to provide basic understanding of some aspects of various embodiments. It should be noted that this summary is not intended to identify key features of essential elements or define scopes of the embodiments, and its sole purpose is to introduce some concepts in a simplified form as a preamble for a more detailed description provided below. In a first aspect, an example embodiment of an apparatus is provided. The apparatus may comprise at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus at least to support a first control resource set and a second control resource set for a serving cell, to receive a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell, and to ignore, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set is configured to follow a transmission configuration indicator state indication for the serving cell. In a second aspect, an example embodiment of an apparatus is provided. The apparatus may comprise at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus at least to receive a transmission configuration indicator state indication for a cell other than a serving cell, to apply the transmission configuration indicator state indication to an apparatus-specific control resource set search space associated with a first control resource set configured for the apparatus, the first control resource set further being associated with a common control resource set search space, and to ignore the transmission configuration indicator state indication for the common control resource set search space associated with the first control resource set. In a third aspect, an example embodiment of an apparatus is provided. The apparatus may comprise at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus at least to receive a transmission configuration indicator state indication, to apply the transmission configuration indicator state indication to a common control resource set search space for one or more control resource sets configured for the apparatus when the transmission configuration indicator state indication is provided for a serving cell and indicates a synchronization signal block as a quasi-colocation source reference signal, and to apply the transmission configuration indicator state indication to an apparatus-specific control resource set search space for the one or more control resource sets configured for the apparatus when the transmission configuration indicator state indication is provided for a cell other than the serving cell and indicates a quasi-colocation source reference signal other than a synchronization signal block. In a fourth aspect, an example embodiment of a method is provided. The method may comprise supporting at an apparatus a first control resource set and a second control resource set for a serving cell, receiving at the apparatus a transmission configuration indicator state indication for the first control resource set for a cell other than the serving cell, and ignoring, for the second control resource set, the received transmission configuration indicator state indication when the second control resource set is configured to follow a transmission configuration indicator state indication for the serving cell. In a fifth aspect, an example embodiment of a method is provided. The method may comprise receiving at an apparatus a transmission configuration indicator state indication for a cell other than a serving cell, applying the transmission configuration indicator state