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EP-4736545-A1 - METHODS AND NETWORK APPARATUS FOR SAVING NETWORK ENERGY IN WIRELESS NETWORK

EP4736545A1EP 4736545 A1EP4736545 A1EP 4736545A1EP-4736545-A1

Abstract

Embodiments herein disclose a method for saving network energy in a wireless network (1000) by a network apparatus (100). The method includes providing at least one of: a spatial-domain (SD) sub-configuration and a power-domain (PD) sub-configuration by reusing at least one of: a legacy powerControlOffset field and a legacy powerControlOffsetSS field present in a CSI resource. Further, the method includes saving the network energy in the wireless network (1000) based on the SD sub-configuration and PD sub-configuration. The methods and the network apparatus can be used for network energy saving using various combinations of SD and PD antenna adaptation in the wireless network. Moreover, extending SD and PD adaptation to multiple TRP will offer more knobs for SD and PD adaptation across m-TRP. The multiple TRPs may jointly serve active users as per Quality of service and jointly save energy at the TRP.

Inventors

  • MONDAL, Santanu
  • SHARMA, DIWAKAR
  • MULGAONKAR, DATTARAJ DILEEP RAUT
  • MURALIDHAR, KARTHIK

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240802

Claims (15)

  1. A method performed by a network apparatus (100) for saving network energy in a wireless network (1000), the method comprising: providing at least one of: a spatial-domain (SD) sub-configuration and a power-domain (PD) sub-configuration by reusing at least one of: a legacy powerControlOffset field and a legacy powerControlOffsetSS field present in a Channel-state information (CSI) resource; and saving the network energy in the wireless network (1000) based on at least one of the SD sub-configuration and the PD sub-configurations.
  2. The method as claimed in claim 1, wherein the powerControlOffsetSS value is a ratio of Channel-state information Reference signal (CSI-RS) power to a Synchronization Signal Block (SSB) power, wherein the powerControlOffset value is a ratio of Physical Data Shared Channel (PDSCH) power to CSI-RS power, and wherein at least one of the powerControlOffset and the powerControlOffsetSS is indicated in at least one of: a CSI report configuration and a CSI resource configuration for the PD sub-configurations.
  3. The method as claimed in claim 1, wherein each SD sub-configuration and the powerControlOffsetSS is associated with its own set of a PD sub-configuration or differential powerControlOffset, wherein a CSI resource is reported per SD-PD combination, wherein the SD sub-configuration shares a set of PD sub-configurations.
  4. The method as claimed in claim 1, further comprising: sending a configuration information for at least one of: a Channel State Information Reference Signal (CSI-RS) and a Transmission and Reception Point (TRP) muting to at least one User Equipment (UE) from a plurality of UEs; receiving a first CSI measurement report for a first measurement and preference information associated with the at least one UE from the plurality of UEs based on the configuration information; determining, by the network apparatus (100), a first action to mute at least one of: the CSI-RS port and the TRP associated with the at least one UE from the plurality of UEs based on the first CSI measurement report; and indicating to the at least one UE from the plurality of UEs for the CSI-RS port and the TRP to be muted based on the determination.
  5. The method as claimed in claim 4, further comprising: indicating a list of CSI-RS ports and CSI-RS resources from one or more resource set for muting to the at least one UE from the plurality of UEs; receiving a second CSI measurement report for a second measurement and preference information associated with the at least one UE from the plurality of UEs, wherein the at least one UE from the plurality of UEs performs measurement on a CSI-RS signal; determining, by the network apparatus (100), a second action to mute at least one of: the CSI-RS port and the TRP to the at least one UE from the plurality of UEs based on the second CSI measurement report; and triggering a CSI-RS re-configuration for the at least one UE from the plurality of UEs based on the determination.
  6. The method as claimed in claim 4, wherein the CSI measurement report comprises a preference and measurement information for each of a port and TRP muting candidate in one of: a CSI-RS port, a single group of CSI-RS port, and the multiple groups of CSI-RS ports, wherein the CSI-RS port, group of ports & multiple groups of ports can be associated with the one or more TRP(s), wherein first CSI measurement report comprises at least one of: the SD sub-configuration, the PD sub-configurations and SD-PD sub-configurations, and wherein each CSI resource in a CSI resource-set corresponds to the port from one or more TRPs in the first CSI measurement report or in the second CSI measurement report.
  7. The method as claimed in claim 1, further comprising: sending a CSI-RS configuration information for at least one CSI-RS port power scaling factor to at least one User Equipment (UE) from a plurality of UEs; receiving a CSI measurement report for a measurement and preference information from the at least one UE based on the configuration information; determining to select at least one CSI-RS port that is power adapted by considering the CSI measurement report from the at least one UE from the plurality of UEs; and indicating to the at least one UE for adapted CSI-RS port.
  8. The method as claimed in claim 7, wherein the CSI measurement report comprises a preference and measurement information for each of a port power adaptation candidate in one of: a CSI-RS port, a single group of the CSI-RS port, and multiple groups of the CSI-RS port, wherein the CSI-RS port, the single group of the CSI-RS port and the multiple groups of the CSI-RS port is associated with one or more Transmission and Reception Points (TRPs), and wherein the network apparatus (100) provides a power-adaptation information as part of the CSI-RS configuration information, wherein the CSI-RS configuration information comprises at least one of: a CSI-RS resource configuration and a CSI-RS report configuration on a per BWP and per CC basis.
  9. The method as claimed in claim 7, wherein the network apparatus (100) performs at least one of: de-boosts all CSI-RS ports with same power scaling factor, boosts all CSI-RS ports with same power scaling factor, de-boosts a power on each of the CSI-RS port on each of the TRPs with different scaling factors, boosts the power on each of the CSI-RS port on each of the TRPs with different scaling factors, and boosts a power on a subset of the CSI-RS port on a TRPs, and de-boosts the power on a rest of the CSI-RS port on other TRPs, both with different scaling factors.
  10. The method as claimed in claim 1, further comprising: indicating a candidate list of Channel State Information Reference Signal (CSI-RS) ports and CSI-RS resources for beam parameter adaptation for at least one User Equipment (UE) from a plurality of UEs; receiving a CSI measurement report for measurement and preference information associated with the at least one UE from the plurality of UEs for a beam parameter adaptation candidate, wherein the UE performs a measurement on a CSI-RS signal based on the indication; determining an action on at least one CSI-RS port that is to beam adapted based on the CSI measurement report received from the plurality of UEs; and indicating to the at least one UE from the plurality of UEs for the beam parameter adaption for a subsets of CSI-RS port with a power scaling information based on the determined first action.
  11. The method as claimed in claim 10, wherein the CSI measurement report indicates a preference on the CSI-RS port and TRP beam parameter adaptation, and wherein the beam parameter adaptation candidate is determined based on at least one beam parameter, wherein the at least one beam parameter comprise at least one of: a beam width, a beam angle, a beam tilt, a beam radiation pattern, and CSI-RS port power.
  12. The method as claimed in claim 10, wherein the beam parameter adaptation involves at least one of: enabling at least one antenna element, at least one antenna sub-array, and at least one TRP associated to a logical antenna port, and disabling at least one antenna element, at least one antenna sub-array, and at least one TRP associated to the logical antenna port, and wherein the CSI measurement report includes a preference and measurement information for each of the beam parameter adaptation candidates in one of: a CSI-RS port, a single group of CSI-RS ports, and a multiple groups of CSI-RS ports, wherein the CSI-RS port, the single group of CSI-RS ports, and the multiple groups of CSI-RS ports is associated with one or more TRPs.
  13. The method as claimed in claim 10, wherein the beam parameter adaptation information is provided as a part of a CSI-RS configuration on per Bandwidth Part (BWP) and per component carrier (CC) basis, wherein the CSI-RS configuration comprises a CSI-RS resource configuration and a CSI-RS report configuration, wherein the power scaling information is indicated to the UE (i) by adapting a transmit power of the CSI-RS ports themselves using a powerControlOffsetSS value or a value update, wherein the powerControlOffsetSS value is a ratio of CSI-RS power to a Synchronization Signal Block (SSB) power, or (ii) by adapting the transmit power of a Physical Downlink Shared Channel (PDSCH) that is quasi-co-located with the CSI-RS ports using a powerControlOffset value or a value update, wherein the powerControlOffset value is a ratio of PDSCH power to CSI-RS power, and wherein each CSI resource in a CSI resource-set corresponds to the port from one or more TRPs in the CSI measurement report.
  14. A network apparatus (100), comprising: a processor (110); a memory (130); and a network energy saving controller (140), coupled with the processor (110) and the memory (130), and configured to: provide at least one of: a spatial-domain (SD) sub-configuration and a power-domain (PD) sub-configuration by reusing at least one of: a legacy powerControlOffset field and a legacy powerControlOffsetSS field present in a CSI resource; and save the network energy in the wireless network (1000) based on at least one of: the SD sub-configuration and the PD sub-configuration.
  15. The network apparatus (100) as claimed in claim 14, wherein the network energy saving controller (140) is further configured to: send a configuration information for at least one of: a Channel State Information Reference Signal (CSI-RS) and a Transmission and Reception Point (TRP) muting to at least one User Equipment (UE) from a plurality of UEs; receive a first CSI measurement report for a first measurement and preference information associated with the at least one UE from the plurality of UEs based on the configuration information; determine a first action to mute at least one of: the CSI-RS port and the TRP associated with the at least one UE from the plurality of UEs based on the first CSI measurement report; and indicate to the at least one UE from the plurality of UEs for the CSI-RS port and the TRP to be muted based on the determination.

Description

METHODS AND NETWORK APPARATUS FOR SAVING NETWORK ENERGY IN WIRELESS NETWORK The present disclosure generally relates to the field of wireless communication, and more particularly relates to network energy saving using various combinations of spatial-domain (SD) and power-domain (PD) antenna adaptation in a wireless communication network (or wireless network), and more particularly to saving network energy in multi Transmission and Reception Point (mTRP) scenarios in the wireless network using at least one of: a port muting, a port power adaptation, and a beam adaptation. 5th generation (5G) mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6GHz" bands such as 3.5 GHz, but also in "Above 6 GHz" bands referred to as mmWave including 28 GHz and 39 GHz. In addition, it has been considered to implement 6th generation (6G) mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95 GHz to 3 THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine-type communications (mMTC), there has been ongoing standardization regarding beamforming and massive multi input multi output (MIMO) for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of bandwidth part (BWP), new channel coding methods such as a low density parity check (LDPC) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service. Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as vehicle-to-everything (V2X) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, new radio unlicensed (NR-U) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE power saving, non-terrestrial network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning. Moreover, there has been ongoing standardization in air interface architecture/protocol regarding technologies such as industrial internet of things (IIoT) for supporting new services through interworking and convergence with other industries, integrated access and backhaul (IAB) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and dual active protocol stack (DAPS) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture/service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions. As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting Augmented Reality (AR), Virtual Reality (VR), Mixed Reality (MR) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication. Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for p