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CN-122029774-A - MAC-CE CSI reporting control for SP reporting on PUCCH

CN122029774ACN 122029774 ACN122029774 ACN 122029774ACN-122029774-A

Abstract

Methods, network nodes, and Wireless Devices (WD) for Medium Access Control (MAC) Network Energy Saving (NES) Channel State Information (CSI) reporting control for semi-persistent (SP) reporting on a Physical Uplink Control Channel (PUCCH) are disclosed. According to one aspect, a method in WD includes configuring a MAC CE for disabling and/or enabling semi-persistent reporting on PUCCH. The method includes transmitting the MAC CE to the wireless device.

Inventors

  • A. nadyr
  • A Nimes balke
  • H-l. matanin
  • S. grant

Assignees

  • 瑞典爱立信有限公司

Dates

Publication Date
20260512
Application Date
20240726
Priority Date
20230802

Claims (20)

  1. 1. A method implemented in a wireless device configured to communicate with a network node, the method comprising: Receiving (270) a medium access control, MAC, control element, CE, from the network node, the MAC CE being for disabling and/or activating a semi-persistent report on a physical uplink control channel, PUCCH, wherein the MAC CE indicates at least one sub-configuration of activating and/or disabling a semi-persistent channel state information, CSI, reporting configuration, and Semi-persistent reporting on the PUCCH is activated and/or deactivated according to the MAC CE (272).
  2. 2. The method of claim 1, wherein the MAC CE comprises a field indicating the at least one sub-configuration of the semi-persistent CSI reporting configuration.
  3. 3. The method of claim 1 or 2, wherein the MAC CE comprises a field indicating an activation/deactivation status of the at least one sub-configuration of the semi-persistent CSI reporting configuration.
  4. 4. A method according to claim 2 or 3, wherein the field comprises a set of bits, each bit of the set of bits indicating an activation/deactivation status of a respective sub-configuration of the semi-persistent CSI reporting configuration.
  5. 5. The method of any preceding claim, wherein the MAC CE comprises a further field indicating an activation/deactivation status of the semi-persistent CSI reporting configuration.
  6. 6. The method of any preceding claim, wherein the MAC CE indicates at least one sub-configuration of each of a plurality of semi-persistent CSI reporting configurations to be activated and/or deactivated.
  7. 7. The method of claim 6, wherein the MAC CE comprises a plurality of fields, each field of the plurality of fields indicating an activation/deactivation status of at least one sub-configuration of a corresponding one of the plurality of semi-persistent CSI reporting configurations.
  8. 8. The method of claim 7, wherein each field of the plurality of fields comprises a set of bits, each bit of the set of bits indicating an activation/deactivation status of a respective sub-configuration of the respective semi-persistent CSI reporting configuration.
  9. 9. The method of any of claims 6-8, wherein the MAC CE comprises a plurality of additional fields, each additional field of the plurality of additional fields indicating an activation/deactivation condition of a respective one of the plurality of semi-persistent CSI reporting configurations.
  10. 10. The method of any preceding claim, wherein the MAC CE has a variable size.
  11. 11. The method of any preceding claim, wherein activating and/or deactivating semi-persistent reporting (272) on the PUCCH according to the MAC CE comprises reporting CSI on PUCCH according to the MAC CE.
  12. 12. The method of any preceding claim, wherein the MAC CE indicates to activate the at least one sub-configuration of the semi-persistent channel state information, CSI, reporting configuration, and wherein activating and/or deactivating semi-persistent reporting on the PUCCH according to the MAC CE comprises reporting CSI on PUCCH according to the at least one sub-configuration of the semi-persistent CSI reporting.
  13. 13. The method of any preceding claim, further comprising receiving the semi-persistent CSI report configuration comprising the at least one sub-configuration via radio resource control, RRC, signaling.
  14. 14. The method of any preceding claim, wherein each of the at least one sub-configuration comprises at least one of a spatial domain adaptation parameter and a power domain adaptation parameter.
  15. 15. The method of any preceding claim, further comprising resetting the state of the at least one sub-configuration of the semi-persistent CSI reporting configuration as inactive upon configuration update via radio resource control, RRC, signaling.
  16. 16. A method implemented in a network node configured to communicate with a wireless device, the method comprising: Configuring (280) a medium access control, MAC, control element, CE, for disabling and/or activating semi-persistent reporting on a physical uplink control channel, PUCCH, wherein the MAC CE is configured to indicate at least one sub-configuration of activating and/or disabling semi-persistent channel state information, CSI, reporting configuration, and The MAC CE is transmitted 282 to the wireless device.
  17. 17. The method of claim 16, wherein the MAC CE is configured to include a field indicating the at least one sub-configuration of the semi-persistent CSI reporting configuration.
  18. 18. The method of claim 16 or 17, wherein the MAC CE is configured to include a field indicating an activation/deactivation status of the at least one sub-configuration of the semi-persistent CSI reporting configuration.
  19. 19. The method of claim 18, wherein the field comprises a set of bits, each bit in the set of bits indicating an activation/deactivation status of a respective sub-configuration of the semi-persistent CSI reporting configuration.
  20. 20. The method of any of claims 16-19, wherein the MAC CE is configured to include a further field indicating an activation/deactivation status of the semi-persistent CSI reporting configuration.

Description

MAC-CE CSI reporting control for SP reporting on PUCCH Technical Field The present disclosure relates to wireless communications, and in particular to Medium Access Control (MAC) Channel State Information (CSI) reporting control for semi-persistent (SP) reporting on a Physical Uplink Control Channel (PUCCH). Background The third generation partnership project (3 GPP) has developed and is developing standards for fourth generation (4G) (also known as Long Term Evolution (LTE)) and fifth generation (5G) (also known as new air interface (NR)) wireless communication systems. Such systems provide, among other features, broadband communication between network nodes, such as base stations, and mobile Wireless Devices (WDs), as well as communication between network nodes and between WDs. WD may also be referred to as user equipment UE. The 3GPP is also developing standards for sixth generation (6G) wireless communication networks. NW energy consumption Network (NW) power consumption of NR is said to be lower than LTE due to the reduced design of NR. However, in current implementations, NR will most likely consume more power than LTE, for example, due to higher bandwidth and due to the introduction of additional elements, such as 64 transmit/receive (TX/RX) ports and associated digital Radio Frequency (RF) chains. Because it is desirable for the NW to be able to support the WD at its maximum capability (e.g., throughput, coverage, etc.), the NW may need to use a full configuration even when the WD actually rarely requires maximum NW support. Further, the increased number of TX/RX ports also results in an increased number of reference signals (e.g., CSI-RS) that need to be transmitted by the NW (and measured by the WD) for proper signal detection. Thus, the additional TX/RX ports may result in another additional power consumption, i.e., to transmit a greater number of channel state information reference signals (CSI-RS) to the WD. Further, it should also be noted that a larger number of CSI-RS transmissions may also consume valuable NW resources. NW energy saving by applying antenna muting To provide high rate cell edge coverage and high spatial resolution, NR gNB (network node) can deploy a large antenna array with hundreds of antenna elements and often up to 32 (or more) digital ports. The energy costs associated with RF (power amplifier (PA) and Low Noise Amplifier (LNA)), digital processing (beam forming (BF)) and baseband processing associated with such arrays are high. Fig. 1 shows an example of an active antenna array arranged in sub-arrays, where 4 antenna elements per sub-array have two different polarizations: +45 degrees and-45 degrees. This example consists of 4×8=32 subarrays. The total number of antenna elements is 32×4=128. Each sub-array is typically connected to two transceiver chains, one for each polarization, as shown in fig. 2. In this example, each transceiver chain corresponds to a digital antenna port. The antenna ports are "seen" by the baseband (L1 processing) in the sense that digital beamforming weights can be applied across multiple ports in the baseband to steer the beam to the scheduled user. In this example, there are two antenna ports for each sub-array for both polarizations. It is quite common for such network nodes to be equipped with 64 transceiver chains, and more is expected in the future, especially at higher frequencies. The large amount of energy consumed by these transceiver chains occupies a major portion of the total consumed network energy. In some scenarios (few users, low load, reduced user TP or latency requirements), maintaining sufficient user and system performance may not require an array of all-antenna network nodes. Then the network node may deactivate or silence portions of the antenna panel and transmit with a subset of antenna elements to reduce energy consumption, as shown in the example of fig. 3. There is a tradeoff between energy saving gain and WD performance penalty. In order to avoid repeated reconfiguration and excessive WD performance loss caused by transceiver silence, it is necessary for the network node to learn what performance will be caused by the different silence modes before the actual transceiver silence decision. This requires that WD may report CSI of not only the current transceiver configuration (e.g., 64 transceivers (64 ports)) but also other candidate configuration(s) (e.g., 32, 16, or 8 transceivers). Notably, the current 3GPP specifications only define up to 32 CSI-RS ports for obtaining CSI feedback, however, extending this to 64 is currently being discussed. In 3gpp ran1#112, two antenna muting types have been defined according to the following agreement: For the purpose of further discussing Network Energy Saving (NES) spatial domain adaptation in RAN1, consider the following scenario: type 1 disabling/enabling all antenna elements associated to a logical antenna port Type 2, disable/enable portions/subsets of antenna elements as