Methods and network apparatus for saving network energy in wireless network

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.

Description

METHODS AND NETWORK APPARATUS FOR SAVING NETWORK ENERGY IN WIRELESS NETWORK

[0001] 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.

[0002] 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.

[0003] 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.

[0004] 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.

[0005] 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.

[0006] 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.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using Orbital Angular Momentum (OAM), and Reconfigurable Intelligent Surface (RIS), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] Within the 3rdGeneration Partnership Project (3GPP) Technical Specification Group Radio Access Network (TSG RAN), the RAN WG1 (Working Group 1) aka RAN1 is responsible for the development of specifications of physical layers of radio Interfaces for a user equipment (UE) to deal with RAT (Radio Access Technology), namely fourth generation Long Term Evolution (4G LTE), fifth generation new radio (5G NR) and beyond. The work in the RAN1 includes especially:

[0009] a) Specification of physical channels and modulation.

[0010] b) Specification of physical layer multiplexing, channel coding, and error detection.

[0011] c) Specification of physical layer procedures (both control and data).

[0012] d) Specification of the definition of measurements and their provision by the physical layer to the upper layers.

[0013] In the current RAN1, RAN -1 agreements for spatial and power domains allow for m-CSI (multi-Channel State Information) reporting for separate spatial-domain (SD) and power-domain (PD) antenna sub-configurations. Embodiments here consider the case of joint SD and PD operation. For example, suppose a network apparatus (e.g., gNB or the like) requests the UE to provide CSI feedback for every (sj, pk)-tuple in a set of joint SD-PD sub-configurations, where sj(for 1≤j≤S) is an SD sub-configuration and pk(for 1≤k≤P) is a PD sub-configuration, then the embodiments here will allow such CSI reporting by configuring such SD or / and PD sub-configurations.

[0014] Further, in the current RAN1 discussions, both spatial-domain and power-domain adaptations are being discussed wherein sub-configurations for both SD and PD adaptations are indicated via a Radio Resource Control (RRC) in the following manner:

[0015] a) Type 1 SD sub-configurations are indicated using port bitmaps.

[0016] b) Type 2 SD sub-configurations are indicated via CSI resource ID.

[0017] c) PD sub-configurations are indicated via the powerControlOffset value.

[0018] Further, currently, in a wireless network, significant amounts of network energy is expended at a base station (e.g., gNB), and a User Equipment (UE) ends in terms of both transmission and reception. Most of the energy in the UE and network equipment's has been spend on a radio frequency (RF) chain (around 60%) and (around 20%) on baseband processing which indicate that adaptation of RF chains and associated baseband processing are key drivers to maximize energy saving at the UE and at the network. hence, there is a need to minimize energy consumptions by adapting RF chains and associated baseband processing in a wireless network.

[0019] The above information is presented as background information only to help the reader to understand the present invention. Applicants have made no determination and make no assertion as to whether any of the above might be applicable as prior art with regard to the present application.

[0020] An object of the embodiments of the present disclosure is to provide methods and a network apparatus for saving network energy in a wireless network.

[0021] Another object of the embodiments herein is to provide network energy saving using various combinations of spatial-domain (SD) and power-domain (PD) antenna adaptation in the wireless network.

[0022] Another object of the embodiments herein is to save network energy in multi-TRP scenarios in the wireless networks using port muting.

[0023] Another object of the embodiments herein is to save network energy in the multi-TRP scenarios using port power adaptation.

[0024] Another object of the embodiments herein is to save network energy in the multi-TRP scenarios using beam adaptation.

[0025] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating at least one embodiment and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the scope thereof, and the embodiments herein include all such modifications.

[0026] Accordingly, the embodiments of the present disclosure provide a method for saving network energy in a wireless network. The method includes providing, by a network apparatus, 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. Further, the method includes saving, by the network apparatus, the network energy in the wireless network based on at least one of: the SD sub-configuration and the PD sub-configuration.

[0027] In an embodiment, the powerControlOffsetSS value is a ratio of Channel-state information Reference signal (CSI-RS) power to a Synchronization Signal Block　(SSB) power.

[0028] In an embodiment, the powerControlOffset value is a ratio of Physical Data Shared Channel (PDSCH) power to CSI-RS power.

[0029] In an embodiment, 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.

[0030] In an embodiment, at least one of: the powerControlOffset and the powerControlOffsetSS is differentially indicated in at least one of: a CSI report configuration and a CSI resource configuration for the PD sub-configurations.

[0031] In an embodiment, each SD sub-configuration and the powerControlOffsetSS is associated with its own set of a PD sub-configuration or differential powerControlOffset.

[0032] In an embodiment, a CSI resource is reported per SD-PD combination, where the SD sub-configuration shares a set of PD sub-configurations.

[0033] In an embodiment, the SD sub-configurations shares a set of PD sub-configuration values.

[0034] In an embodiment, the method includes sending, by the network apparatus, 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. The configuration information includes any sub-configuration information that is sent via a radio resource control (RRC) message. Further, the method includes receiving, by the network apparatus, 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. Further, the method includes determining, by the network apparatus, 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. Further, the method includes indicating, by the network apparatus, 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. The first CSI measurement report includes the SD sub-configuration, PD sub-configurations and SD-PD sub-configurations.

[0035] In an embodiment, further, the method includes indicating, by the network apparatus, 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. Further, the method includes receiving, by the network apparatus, a second CSI measurement report for a second measurement and preference information associated with the at least one UE from the plurality of UEs. The at least one UE from the plurality of UEs performs measurement on a CSI-RS signal. Further, the method includes determining, by the network apparatus, 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. Further, the method includes triggering, by the network apparatus, a CSI-RS re-configuration for the at least one UE from the plurality of UEs based on the determination.

[0036] In an embodiment, the first CSI measurement report includes at least one of: a Reference Signal Received Power (RSRP) measurement report, a Signal to Interference Noise Ratio (SINR) measurement report, a Reference Signal Received Quality (RSRQ) measurement report, a CSI-RS Resource Indicator (CRI), a Ranking Indicator (RI), a Layer Indicator (LI), a Pre-coding Matrix Indicator (PMI), and a Channel Quality Indicator (CQI).

[0037] In an embodiment, the second CSI measurement report includes at least one of: a RSRP measurement report, a SINR measurement report, a RSRQ measurement report, a CRI, a RI, a LI, a PMI, and a CQI.

[0038] In an embodiment, the CSI measurement report includes 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, where the CSI-RS port, group of ports & multiple groups of ports can be associated with the one or more TRP(s).

[0039] In an embodiment, each CSI resource in a CSI resource-set corresponds to the port from one or more TRPs in the first CSI measurement report.

[0040] In an embodiment, each CSI resource in a CSI resource-set corresponds to the port from one or more TRPs in the second CSI measurement report.

[0041] In an embodiment, the method includes sending, by a network apparatus, a CSI-RS configuration information for at least one CSI-RS port power scaling factor to at least one UE from a plurality of UEs. Further, the method includes receiving, by the network apparatus, a CSI measurement report for a measurement and preference information from the at least one UE based on the configuration information. Further, the method includes determining, by the network apparatus, to select at least one CSI-RS port that is power adapted by considering the feedback from the at least one UE from the plurality of UEs. Further, the method includes indicating, by the network apparatus, to the at least one UE for adapted CSI-RS port.

[0042] In an embodiment, the CSI measurement report includes 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, where 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 TRPs.

[0043] In an embodiment, the network apparatus provides a power-adaptation information as part of the CSI-RS configuration information. The CSI-RS configuration information includes at least one of: a CSI-RS resource configuration and a CSI-RS report configuration on per BWP and per CC basis.

[0044] In an embodiment, the network apparatus 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.

[0045] In an embodiment, further, the method includes indicating, by the network apparatus, a candidate list of CSI-RS ports and CSI-RS resources for beam parameter adaptation for the at least one UE from a plurality of UEs. Further, the method includes receiving, by the network apparatus, 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. The UE performs a measurement on a CSI-RS signal based on the indication. Further, the method includes determining, by the network apparatus, 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. Further, the method includes indicating, by the network apparatus, 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.

[0046] In an embodiment, the CSI measurement report indicates a preference on the CSI-RS port and TRP beam parameter adaptation.

[0047] In an embodiment, the beam parameter adaptation candidate is determined based on at least one beam parameter, where the at least one beam parameter includes at least one of: a beam width, a beam angle, a beam tilt, a beam radiation pattern, and CSI-RS port power.

[0048] In an embodiment, 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.

[0049] In an embodiment, 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, where 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.

[0050] In an embodiment, 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, where the CSI-RS configuration includes a CSI-RS resource configuration and a CSI-RS report configuration.

[0051] In an embodiment, the power scaling information is indicated to the UE by adapting a transmit power of the CSI-RS ports themselves using a powerControlOffsetSS value or an offset value, where the powerControlOffsetSS value is a ratio of CSI-RS power to a Synchronization Signal Block (SSB) power.

[0052] In an embodiment, the power scaling information is indicated to the UE 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 (e.g., combination of powerControlOffsetSS and offset value or the like), where the powerControlOffset value is a ratio of PDSCH power to CSI-RS power.

[0053] In an embodiment, each CSI resource in a CSI resource-set corresponds to the port from one or more TRPs in the CSI measurement report.

[0054] Accordingly, the embodiments herein provide a network apparatus including a network energy saving controller coupled with a processor and a memory. The network energy saving controller is 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. Further, the network energy saving controller is configured to save the network energy in the wireless network based on at least one of: the SD sub-configuration and the PD sub-configuration.

[0055] In an embodiment, the network energy saving controller is configured to send a configuration information for at least one of: a CSI-RS and a TRP muting to at least one UE from a plurality of UEs. Further, the network energy saving controller is configured to 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. Further, the network energy saving controller is configured to 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. Further, the network energy saving controller is configured to 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.

[0056] In an embodiment, the network energy saving controller is configured to send a CSI-RS configuration information for at least one CSI-RS port power scaling factor to at least one UE from a plurality of UEs. Further, the network energy saving controller is configured to receive a CSI measurement report for a measurement and preference information from the at least one UE based on the configuration information. Further, the network energy saving controller is configured to determine to select at least one CSI-RS port that is power adapted by considering the feedback from the at least one UE from the plurality of UEs. Further, the network energy saving controller is configured to indicate to the at least one UE for adapted CSI-RS port.

[0057] In an embodiment, the network energy saving controller is configured to the network energy saving controller is configured to indicate a candidate list of CSI-RS ports and CSI-RS resources for beam parameter adaptation for at least one UE from a plurality of UEs. Further, the network energy saving controller is configured to receive 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. The UE performs a measurement on a CSI-RS signal based on the indication. Further, the network energy saving controller is configured to determine 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. Further, the network energy saving controller is configured to indicate 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.

[0058] The embodiments disclosed herein are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:

[0059] FIG. 1 illustrates joint SD-PD sub-configurations, according to an example embodiment of the present disclosure;

[0060] FIG. 2 illustrates a joint operation of SD adaptations, according to an example embodiment of the present disclosure;

[0061] FIG. 3A illustrates a generic framework for associating CSI resources in a CSI resource set with SD and PD sub-configurations to produce one or more CSI reports, according to an embodiment of the present disclosure;

[0062] FIG. 3B illustrates a generic framework for associating CSI resources in a CSI resource set with SD and PD sub-configurations to produce one or more CSI reports, according to an embodiment of the present disclosure;

[0063] FIG. 4 depicts a process for saving network energy in multi-TRP scenarios in a wireless network using port / TRP muting, according to an embodiment of the present disclosure;

[0064] FIG. 5 depicts an example scenario, wherein the network energy is saved in the multi-TRP scenario in the wireless network using the TRP muting, according to an embodiment of the present disclosure;

[0065] FIG. 6 depicts the process of adapting port power for CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0066] FIG. 7A depicts an example process of adapting port power for CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0067] FIG. 7B depicts an example process of adapting port power for CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0068] FIG. 8 depicts the process for adapting beam parameters for certain CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0069] FIG. 9A depicts an example process for adapting beam parameters for certain CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0070] FIG. 9B depicts an example process for adapting beam parameters for certain CSI-RS / antenna ports and TRPs, according to an embodiment of the present disclosure;

[0071] FIG. 10 shows various hardware components of a network apparatus, according to an embodiment of the present disclosure;

[0072] FIG. 11 is a flow chart illustrating a method for saving network energy in the wireless network using various combinations of spatial-domain (SD) and power-domain (PD) antenna adaptation, according to an embodiment of the present disclosure;

[0073] FIG. 12 is a flow chart illustrating a method for saving network energy in the wireless network using port muting, according to an embodiment of the present disclosure;

[0074] FIG. 13 is a flow chart illustrating a method for saving network energy in the wireless network using port power adaptation, according to an embodiment of the present disclosure; and

[0075] FIG. 14 is a flow chart illustrating a method for saving network energy in the wireless network using beam adaptation, according to an embodiment of the present disclosure.

[0076] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein can be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.

[0077] In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0078] While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0079] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a device or system or apparatus proceeded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the device or system or apparatus.

[0080] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.

[0081] For the purposes of interpreting this specification, the definitions (as defined herein) will apply and whenever appropriate the terms used in singular will also include the plural and vice versa. It is to be understood that the terminology used herein is for the purposes of describing particular embodiments only and is not intended to be limiting. The terms "comprising", "having" and "including" are to be construed as open-ended terms unless otherwise noted.

[0082] The words / phrases "exemplary", "example", "illustration", "in an instance", "and the like", "and so on", "etc.", "etcetera", "e.g.," , "i.e.," are merely used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein using the words / phrases "exemplary", "example", "illustration", "in an instance", "and the like", "and so on", "etc.", "etcetera", "e.g.," , "i.e.," is not necessarily to be construed as preferred or advantageous over other embodiments.

[0083] Embodiments herein may be described and illustrated in terms of blocks which carry out a described function or functions.　These blocks, which may be referred to herein as managers, units, modules, hardware components or the like, are physically implemented by analog and / or digital circuits such as logic gates, integrated circuits, microprocessors, microcontrollers, memory circuits, passive electronic components, active electronic components, optical components, hardwired circuits and the like, and may optionally be driven by a firmware. The circuits may, for example, be embodied in one or more semiconductor chips, or on substrate supports such as printed circuit boards and the like.　The circuits constituting a block may be implemented by dedicated hardware, or by a processor (e.g., one or more programmed microprocessors and associated circuitry), or by a combination of dedicated hardware to perform some functions of the block and a processor to perform other functions of the block.　Each block of the embodiments may be physically separated into two or more interacting and discrete blocks without departing from the scope of the disclosure.　Likewise, the blocks of the embodiments may be physically combined into more complex blocks without departing from the scope of the disclosure.

[0084] It should be noted that elements in the drawings are illustrated for the purposes of this description and ease of understanding and may not have necessarily been drawn to scale. For example, the flowcharts / sequence diagrams illustrate the method in terms of the steps required for understanding of aspects of the embodiments as disclosed herein. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the present embodiments so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. Furthermore, in terms of the system, one or more components / modules which comprise the system may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the present embodiments so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

[0085] The accompanying drawings are used to help easily understand various technical features and it should be understood that the embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any modifications, equivalents, and substitutes in addition to those which are particularly set out in the accompanying drawings and the corresponding description. Usage of words such as first, second, third etc., to describe components / elements / steps is for the purposes of this description and should not be construed as sequential ordering / placement / occurrence unless specified otherwise.

[0086] Embodiments herein disclose methods and a network apparatus for saving network energy in a wireless network. The method includes providing, by a network apparatus, 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, by the network apparatus, the network energy in the wireless network based on at least one of: the SD sub-configuration and PD sub-configuration.

[0087] The methods and the network apparatus can be used for saving network energy in the multi-TRP scenarios in the wireless networks using a port muting, a port power adaptation, and a beam adaptation. 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. Additionally providing more combinations of SD and PD with multiple simultaneous SD configurations and multiples PD configurations associated with each SD configuration will offer more knobs to save energy per TRP and jointly by multiple TRPs.

[0088] Embodiments herein define a base station energy consumption model [e.g., first radio access network (RAN) model]. Embodiments herein adapt the framework of the power consumption modelling and evaluation methodology of TR 38.840 to a base station side, including relative energy consumption for downlink (DL) and uplink (UL) (considering factors like power amplifier (PA) efficiency, number of TxRU, base station load, etc.), sleep states and the associated transition times, and one or more reference parameters / configurations.

[0089] Embodiments herein define an evaluation methodology and key performance indicators (KPIs) [at the first RAN]. Embodiments herein evaluate system-level network energy consumption and energy savings gains, as well as assess / balance impact to network and user performance (e.g. spectral efficiency, capacity, User Perceived Throughput (UPT), latency, handover performance, call drop rate, initial access performance, service level agreement (SLA) assurance related KPIs), energy efficiency, and UE power consumption, complexity. Embodiments herein do not focus on a single KPI, and reuse existing KPIs whenever applicable, where existing KPIs are found to be insufficient new KPIs may be developed as needed. Work groups (WGs) will decide KPIs to evaluate and how.

[0090] Embodiments herein study and identify techniques on the gNB and UE side to improve network energy savings in terms of both base station (BS) transmission and reception, which may include:

[0091] a. How to achieve more efficient operation dynamically and / or semi-statically and finer granularity adaptation of transmissions and / or receptions in one or more of network energy saving techniques in time, frequency, spatial, and power domains, with potential support / feedback from UE, and potential UE assistance information [RAN1, RAN2].

[0092] b. Information exchange / coordination over network interfaces [RAN3]

[0093] Embodiments herein prioritize idle / empty and low / medium load scenarios (the exact definition of such loads is left to the study), and different loads among carriers and neighbor cells are allowed.

[0094] Embodiments herein disclose study techniques and enhancements for the adaptation of number of spatial elements of the gNB, including (but not limited to) the following aspects:

[0095] 1. Spatial elements may include antenna element(s), TxRU(s) (with sub-array / full-connection), antenna panel(s), TRxP(s) (co-located or geographically separated from each other), logical antenna port(s) (corresponding to specific signals and channels).

[0096] 2. Impact to UE operations from dynamic adaptation of spatial elements, e.g., measurements, CSI feedback, power control, Physical Uplink Shared Channel (PUSCH) / Physical Downlink Shared Channel (PDSCH) repetition, SRS transmission, Transmission Configuration Index (TCI) configuration, beam management, beam failure recovery, radio link monitoring, cell (re)selection, handover, initial access, etc.

[0097] 3. Feedback / assistance information from the UE required for support dynamic spatial element adaptation. For example, CSI measurement and reports, scheduling request　(SR), etc.

[0098] 4. Signaling methods, including reduced signaling, for enabling dynamic spatial element adaptation. For example, group-common L1 signaling, broadcast signaling, Medium Access Control control-element (MAC CE), etc.

[0099] 5. Dynamic TRxP adaptation;

[0100] a. triggering on / off conditions for TRxP(s). This may not have specification impact and could potentially be up to network implementation.

[0101] b. SSB, PL-RS, TRS, and CSI-RS re-configuration and its impact to initial access procedure, synchronization and measurements performed by the idle / inactive / connected UEs.

[0102] 6. Dynamic logical port adaptation and efficient port reconfigurations:

[0103] I. details of signaling the port (e.g., NZP CSI-RS ports) (if required to be known by the UE).

[0104] II. dynamic adaptation (including activation / deactivation) of CSI measurement or report configuration for port adaptation.

[0105] 7. Joint adaptation of spatial-domain, frequency-domain and / or power-domain configurations to avoid coverage loss

[0106] 8. Grouping of UEs to reduce transmission and reception footprint at the gNB; including but not limited to the grouping of users in the spatial domain.

[0107] CSI-RS port muting can involve using UE feedback CSI measurements to identify which CSI-RS port(s), and in which TRP(s), can be muted.

[0108] SSB beams, in general, are considered to have wider beam-width. CSI-RS beams are narrower compared to SSB beams.

[0109] The UE performs measurements on SSB(s) and CSI-RS port(s) corresponding to one or more TRP(s). If the gNB does not receive reporting quantity (for example, RSRP, SINR, etc.) on a (non-empty) set of SSB / CSI-RS beams, then those will become candidate for muting.

[0110] Embodiments herein use the UE feedback CSI measurements to identify which CSI-RS / antenna port(s) and TRP(s) can have their power boosted / de-boosted. The gNB receives RSRP measurements for all CSI-RS resources:

[0111] 1. If minimum RSRP received from all UEs for certain port(s) is above a configured threshold, the port(s) can be candidate(s) for de-boosting power.

[0112] 2. If maximum RSRP received from all UEs for certain port(s) is below a configured threshold, the port(s) can be candidate(s) for boosting power.

[0113] Measurements received on the aforementioned (non-empty) set of CSI-RS resources are monitored for a pre-configured period to add hysteresis. The gNB identifies a candidate set of CSI-RS ports on which power boosting / de-boosting can be performed. The gNB receives CSI measurements (PMI, RI, etc.) for all CSI-RS resources before downlink data transmission:

[0114] a. If RI received from a UE for a resource is above a certain threshold, the antenna port(s) can be candidate(s) for de-boosting power.

[0115] b. If RI received from a UE for a resource is below a certain threshold, the antenna port(s) can be candidate(s) for boosting power.

[0116] Referring now to the drawings, and more particularly to FIGS. 1 through 14, where similar reference characters denote corresponding features consistently throughout the figures, there are shown at least one embodiment.

[0117] FIG. 1 illustrates an exemplary embodiment (S100) of joint SD-PD sub-configurations, according to an embodiment of the present disclosure.

[0118] In an embodiment, various joint SD-PD adaptation combinations are based on the present RAN1 agreements. The various joint SD-PD adaptation combinations reuse the legacy powerControlOffset and powerControlOffsetSS fields present in the CSI resources themselves. The powerControlOffsetSS value is a ratio of CSI-RS power to the SSB power. The powerControlOffset value is a ratio of PDSCH power to CSI-RS power.

[0119] The joint operation of Type1 / Type2 SD along with PD adaptations with a sub-configuration indication via CSI report configuration has the following options: wherein, Type-1 is sub configuration of antenna ports in a TRP and Type 2 is sub configurations of antenna elements in an antenna ports in a TRP.

[0120] - Option 1: For PD sub-configurations, additional powerControlOffset values are indicated in a CSI report configuration.

[0121] - Option 2: For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration.

[0122] a. Option 2A: Differential value of zero is allowed (for example, powerControlOffset + ZERO = OK).

[0123] b. Option 2B: Differential value of zero is not supported (for example, powerControlOffset + ZERO = Not OK).

[0124] c. All PD sub-configurations are applicable to each SD sub-configuration.

[0125] - Option 3: For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration.

[0126] a. Option 3A: Differential value of zero is allowed.

[0127] b. Option 3B: Differential value of zero is not supported.

[0128] c. Each SD sub-configuration is associated with its own set of PD sub-configurations (or differential powerControlOffset values) and CSI is reported per SD-PD combination. One or more SD sub-configurations may share a set of PD sub-configurations.

[0129] - Option 4: (Only applicable for Type 1 SD) For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration. Differential values of zero are not precluded. Each SD sub-configuration is associated with a set of differential powerControlOffset values (i.e. each group of CSI ports uses a particular differential powerControlOffset value from the PD sub-configuration associated with the said SD sub-configuration) and CSI is reported per SD sub-configuration. One or more SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0130] According to an embodiment, the joint operation of Type1 / Type2 SD along with PD adaptations with the sub-configuration indication via a CSI resource configuration has the following options:

[0131] - Option 1: For PD sub-configurations, additional powerControlOffset values are indicated within the CSI within the CSI resource configuration.

[0132] - Option 2: For PD sub-configurations, additional powerControlOffset values are differentially indicated within the CSI resource configuration.

[0133] a. Option 2A: Differential value of zero is allowed.

[0134] b. Option 2B': Differential value of zero is not supported.

[0135] c. All PD sub-configurations are applicable to each SD sub-configuration.

[0136] - Option 3: For PD sub-configurations, additional powerControlOffset values are differentially indicated within the CSI resource configuration.

[0137] a. Option 3A: Differential value of zero is allowed.

[0138] b. Option 3B': Differential value of zero is not supported.

[0139] c. Each SD sub-configuration is associated with its own set of PD sub-configurations (or differential powerControlOffset values) and CSI is reported per SD-PD combination. One or more SD sub-configurations may share a set of PD sub-configurations.

[0140] - Option 4: (Only applicable for Type 1 SD) For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI resource configuration. Differential values of zero are not precluded. Each SD sub-configuration is associated with a set of differential powerControlOffset values (i.e. each group of CSI ports uses a particular differential powerControlOffset value from the PD sub-configuration associated with the said SD sub-configuration) and CSI is reported per SD sub-configuration. One or more SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0141] Further, legacy CSI resources contain the powerControlOffset field already, which can be used as a baseline power-offset value. Since each PD sub-configuration corresponds to a different powerControlOffset value, these values are needed to be indicated (differentially) either within the CSI resource / resource-set itself or the CSI report configuration. Indication via the CSI report configuration may be more appropriate since it allows for a more flexible configuration of these hypothetical power-offset values. Further, the option 2 is preferable over the option 1, since a differential configuration would be more efficient. Also, the option 2B is better since a differential value of zero is implicitly indicated using the powerControlOffset value present in the CSI resources themselves and does not require separate explicit indications in the CSI report configuration. Further, each Type1 / Type2 SD sub-configuration is associated with all PD sub-configurations (or differential powerControlOffset values) in the option 2, which implies that with K Type1 / Type2 SD sub-configurations and L PD sub-configurations, the UE (200a-200c) would need to report K*L report quantities. Where K is the number of SD sub configurations and L is PD sub configurations. This can be quite prohibitive in terms of the feedback overhead but is relatively simpler to configure as compared to the option 3. The option 3 is quite similar to the option 2. Unlike the option 2, however, each Type1 / Type2 SD sub-configuration in the option 3 is associated with its own set of PD sub-configurations (or differential powerControlOffset values), which implies that with K Type1 / Type2 SD sub-configurations and a total of L PD sub-configurations, the UE (200a-200c) might need to report fewer than K*L report quantities, if each SD sub-configuration is not associated with all L PD sub-configurations. Although the CSI report configuration may become more complicated when compared with the option 2, the option 3B will be preferred since it can provide a significant reduction of CSI feedback overhead. The option 4 is largely targeted towards more fine-grained control of CSI port powers and allows groups of CSI ports in a Type 1 SD sub-configuration to be configured with individual powerControlOffset values (or PD sub-configurations). Each Type 1 SD sub-configuration is associated with the set of PD sub-configuration values and produces a single PMI (or other report quantity) in this case. Also, multiple Type 1 SD sub-configurations can share a set of PD sub-configuration values. The aforesaid is applicable in the case where the sub-configuration indication is performed via CSI resource configuration, despite more complications from the RAN1 specification effort perspective.

[0142] FIG. 2 illustrates an exemplary embodiment (S200) of the joint operation of SD adaptations, according to an embodiment of the present disclosure.

[0143] The joint operation of Type 2 SD along with Type 1 SD is expected to be supported based on present RAN1 agreements. A basic version of this can already be supported at present. For example, the Type 2 SD sub-configuration associated with all M CSI resources in the CSI resource set and N Type 1 SD sub-configurations will produce N CSI report quantities within the m-CSI report. In the general case, with K Type 2 SD sub-configurations, each associated with M1, M2, ... , MKCSI resources from a CSI resource set, and N Type 1 SD sub-configurations, we will have a total of K*N CSI report quantities within the m-CSI report. M1, M2, ... , MK is CSI resources from the CSI resource set. Each CSI report will contain the CRI for the corresponding CSI resource in the joint Type 2 and Type 1 SD sub-configuration.

[0144] For the joint operation of Type 1 SD, Type 2 SD, and PD adaptations with a sub-configuration indication via CSI report configuration has the following options:

[0145] - Option 1: For PD sub-configurations, additional powerControlOffset values are indicated in the CSI report configuration.

[0146] - Option 2: For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration.

[0147] a. Option 2A: Differential value of zero is allowed.

[0148] b. Option 2B: Differential value of zero is not supported.

[0149] c. All PD sub-configurations are applicable to each combination of Type 1 and Type 2 SD sub-configurations.

[0150] - Option 3: For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration.

[0151] a. Option 3A: Differential value of zero is allowed.

[0152] b. Option 3B: Differential value of zero is not supported.

[0153] c. Each combination of Type 1 and Type 2 SD sub-configurations is associated with its own set of PD sub-configurations (or differential powerControlOffset values) and CSI is reported per combination of Type 1 SD, Type 2 SD and PD sub-configurations. One or more Type 1 SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0154] - Option 4: For PD sub-configurations, additional powerControlOffset values are differentially indicated in the CSI report configuration. Differential values of zero are not precluded. Each combination of Type 1 and Type 2 SD sub-configurations is associated with a set of differential powerControlOffset values and CSI is reported per combination of Type 1 SD and Type 2 SD sub-configuration. One or more Type 1 SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0155] According to an embodiment, the joint operation of Type 1 SD, Type 2 SD, and PD adaptations with the sub-configuration indication via the CSI resource configuration has the following options:

[0156] - Option 1': For PD sub-configurations, additional powerControlOffset values are indicated within the CSI resource configuration.

[0157] - Option 2': For PD sub-configurations, additional powerControlOffset values aredifferentiallyindicated within the CSI resource configuration.

[0158] a. Option 2A': Differential value of zero is allowed.

[0159] b. Option 2B': Differential value of zero is not supported.

[0160] c. All PD sub-configurations are applicable to each combination of Type 1 and Type 2 SD sub-configurations.

[0161] - Option 3': For PD sub-configurations, additional powerControlOffset values aredifferentiallyindicated within the CSI resource configuration.

[0162] a. Option 3A': Differential value of zero is allowed.

[0163] b. Option 3B': Differential value of zero is not supported.

[0164] c. Each combination of Type 1 and Type 2 SD sub-configurations is associated with its own set of PD sub-configurations (or differential powerControlOffset values) and CSI is reported per combination of Type 1 SD, Type 2 SD and PD sub-configurations. One or more Type 1 SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0165] - Option 4': For PD sub-configurations, additional powerControlOffset values aredifferentiallyindicated in CSI resource configuration. Differential values of zero are not precluded. Each combination of Type 1 and Type 2 SD sub-configurations is associated with a set of differential powerControlOffset values and CSI is reported per combination of Type 1 SD and Type 2 SD sub-configuration. One or more Type 1 SD sub-configurations may share a set of PD sub-configurations (or differential powerControlOffset values).

[0166] For joint Type 1 SD, Type 1 SD, and PD adaptation operation, considerations are almost similar as for joint Type1 / Type2 SD and PD adaptation operation. Option 3B is preferable since it may provide a significant reduction of CSI feedback overhead while complicating the CSI report configuration only marginally compared to option 2. Similar to the previous joint Type1 / Type2 SD and PD adaptation operation scenario, option 4 is targeted towards more fine-grained control of CSI port powers and operates in a similar manner. Additionally, the aforesaid applies to the case where a sub-configuration indication is performed via the CSI resource configuration, despite a greater RAN1 specification effort.

[0167] FIG. 3A and FIG. 3B illustrate a generic framework (300a, 300b) for associating CSI resources in the CSI resource set with the SD and PD sub-configurations to produce one or more CSI reports, according to an embodiment of the present disclosure. FIG. 3A and FIG. 3B describe the generic framework for associating CSI resources in the CSI resource set with SD and PD sub-configurations to produce the one or more CSI reports. Examples at blocks 301 of the FIG. 3A show Type 1 SD operation with the single SD sub-configuration and two PD sub-configurations to produce two respective CSI reports. Examples at blocks 302 of FIG. 3B show Type 2 SD operation with the single SD sub-configuration and two PD sub-configurations to produce two respective CSI reports. In FIG. 3A and FIG. 3B, PD sub-configurations are denoted as PO (power-offset) values. Further, the differential powerControlOffset value is denoted as powerControlOffsetDelta.

[0168] In an embodiment of the present disclosure, clauses as described in: i) for the joint operation of Type1 / Type2 SD along with PD adaptations with the sub-configuration indication via the CSI report and CSI resource configuration with various options; ii) for the joint operation of Type 1 SD, Type 2 SD, and PD adaptations with the sub-configuration indication via CSI report and CSI resource configuration, along with other mentioned clauses, describes joint SD-PD sub-configurations by considering the powerControlOffset field. Further, the PD sub-configurations may comprise of (differential) powerControlOffsetSS values as well, such differential values being denoted aspowerControlOffsetSSDelta. Similar methods as described in clauses as described in: i) for the joint operation of Type1 / Type2 SD along with PD adaptations with a sub-configuration indication via CSI report and CSI resource configuration with various options; ii) for the joint operation of Type 1 SD, Type 2 SD, and PD adaptations with a sub-configuration indication via CSI report and CSI resource configuration, along with other mentioned clauses, can be considered for joint SD-PD sub-configurations using the powerControlOffsetSS field, or any combination of powerControlOffsetSS and powerControlOffset fields.

[0169] FIG. 4 depicts a process for saving network energy in multi-TRP scenarios in a wireless network (1000) using port muting according to an embodiment of the present disclosure.

[0170] The wireless network (1000) can be, for example, but not limited to a fourth generation (4G) network, a fifth generation (5G) network, an Open Radio Access Network　(ORAN), and a sixth generation (6G) network. In step 1, the network apparatus (100) can provide configuration information for CSI-RS port / TRP muting to at least one UE from a plurality of UEs (200a-200c). The configuration information includes any sub-configuration information that is sent via a radio resource control (RRC) message. In step 2, the UEs (200a-200c) provide feedback for measurements and preference information. In step 3, the network apparatus (100) can make a decision on ports and TRPs that can be muted by considering feedback / measurements from all UEs (200a-200c). In step 4, the network apparatus (100) can accordingly provide an indication to the UEs (200a-200c) for port(s) / TRP(s) to be muted.

[0171] FIG. 5 depicts an example scenario, wherein network energy is saved in the multi-TRP scenario in the wireless network (1000) using the port / TRP muting, wherein TRP3 is switched off as TRP1 and TRP2 are able to serve the users quite well.

[0172] Embodiments herein can provide an indication to the UEs (200a-200c) to measure all muting CSI-RS port / TRP candidates. The CSI-RS port muting candidates can be one of: enabling at least one antenna element, at least one antenna sub-array and at least one TRP associated to a logical CSI-RS / antenna port; and disabling the at least one antenna element, the at least one antenna sub-array and the at least one TRP associated to the logical CSI-RS / antenna port.

[0173] Embodiments herein disclose a method to report CSI measurements to the network apparatus (100) (e.g., gNB or the like). The CSI measurement report includes a preference and measurement information for each of the port / TRP muting candidates in one of: the CSI-RS port, the single group of CSI-RS ports, and the multiple groups of CSI-RS ports, wherein the CSI-RS port and the group of ports & multiple groups of ports can be associated with the one or more TRP(s). The CSI measurement report includes at least one of: a RSRP measurement report, a SINR measurement report, a RSRQ measurement report, a CRI, a RI, a LI, a PMI, and a CQI.

[0174] Before muting certain CSI-RS ports / TRPs, the network apparatus (100) (e.g., gNB) can indicate the list of CSI-RS ports and CSI-RS resources / resource-sets for muting to all (or a group of) UEs (200a-200c). In step 1, the network apparatus (100) (e.g., gNB) may transmit, to UEs (200a-200c), configuration information for CSI-RS port / TRP muting. The UE (200a-200c) can perform measurements on the CSI-RS signals (based on the indication received in step 1 from the network apparatus (100)). Based on that, it then reports back preference and other measurement information related to the port-muting candidates, in step 2. The network apparatus (100) (e.g., gNB or the like) will receive the measurement reports from the indicated UEs (200a-200c) and their respective preferences on CSI-RS port and TRP muting. In step 3, the network apparatus (100) (e.g., gNB) decides upon which ports / TRPs to mute and triggers CSI-RS re-configuration for all (or a group of) UEs (200a-200c). For example, the network apparatus (100) may determine to switch off (mute) TRP3 based on the measurement report of UEs (200a-200c). In step 4, the network apparatus (100) may transmit an indication to the UEs (200a-200c) for muting of ports / TRPs (e.g., TRP3).

[0175] Embodiments herein report the CSI measurement results using the following methods:

[0176] a. Each CSI resource in the CSI resource-set corresponds to port(s) from only one TRP:

[0177] I. Impact of port-muting is measured by the UE (200a-200c) on the per-TRP basis. Each resource in the resource-set corresponds to only one TRP. However, there may be one or more resources in the resource-set corresponding to the same TRP.

[0178] b. Each CSI resource in a CSI resource-set corresponds to port(s) from one or more TRPs:

[0179] I. Impact of port-muting is measured by the UE (200a-200c) across TRPs. Some or all resources in the resource-set corresponds to more than one TRP. However, there may be one or more resources in the resource-set corresponding to only one TRP.

[0180] The network apparatus (100) identifies the candidate set of CSI-RS ports on which power boosting / de-boosting can be performed.

[0181] FIG. 6 depicts the process of adapting port power for CSI-RS / antenna ports and TRPs in the wireless network (1000), according to an embodiment of the present disclosure.

[0182] The network apparatus (100) indicates the candidate list of CSI-RS ports and CSI-RS resources / resource-sets for port power-adaptation (boosting / de-boosting) to all (or a group of) UEs (at step 1). The UE (200a-200c) performs measurements on the CSI-RS signals (based on the indication received in step 1 from the network apparatus (100)). Based on that, it then reports back preference and other measurement information related to the port power-adaptation candidates (at step 2). The network apparatus (100) will receive the measurement reports from the indicated UEs (200a-200c) and their respective preferences on port / TRP power-adaptation. The network apparatus (100) decides upon which port(s), and on which TRP(s), are to be power-adapted and triggers CSI-RS re-configuration for all (or a group of) UEs (at step 3). The network apparatus (100) may transmit an indication to the UEs (200a-200c) for adapted CSI-RS ports power scaling.

[0183] FIGS. 7A and 7B depict an example process of adapting port power for CSI-RS / antenna ports in the 2-TRP scenario, according to an embodiment of the present disclosure.

[0184] Embodiments herein provide an indication to the UEs (200a-200c) to measure all CSI-RS port and TRP power adaptation candidates. The at least one power adaptation candidate indicates at least one of: at least one power offset value for at least one of the configured CSI-RS resource set, and at least one configured CSI-RS resource in the configured CSI-RS resource set, where the CSI-RS resource set and the CSI-RS resource can be associated with the one or more TRP(s).

[0185] Embodiments herein disclose a method to report the CSI measurements to the network apparatus (100). The CSI measurement report includes the preference and measurement information for each of the port / TRP power adaptation candidates in one of: the CSI-RS port, the single group of CSI-RS ports, and the multiple groups of CSI-RS ports. The CSI-RS port, the group of ports and the multiple groups of ports can be associated with the one or more TRP(s). The CSI measurement report includes at least one of a RSRP measurement, a SINR measurement, a RSRQ measurement, a CRI, a RI, a LI, a PMI, and a CQI. The first CSI measurement report includes the SD sub-configuration, PD sub-configurations and SD-PD sub-configurations.

[0186] Embodiments herein can provide the power-adaptation information as part of CSI-RS configuration, including but not limited to, CSI-RS resource configuration and CSI-RS report configuration, in one of following formats on a per BWP and per CC basis:

[0187] a. The network apparatus (100) should de-boost / boost all CSI-RS ports / TRPs with same power scaling factor.

[0188] b. The network apparatus (100) should de-boost / boost the power on each of the CSI-RS port(s) on each of the TRPs with different scaling factors.

[0189] c. The network apparatus (100) should boost the power on a subset of the CSI-RS port(s) on some TRPs and de-boost the power on the rest of the CSI-RS port(s) on other TRPs, both with different scaling factors.

[0190] d. In order to reset the port powers quickly, the network apparatus (100) could set all CSI-RS ports to the same reference power.

[0191] Embodiments herein provide an indication to the UEs (200a-200c) to measure all CSI-RS port / TRP power adaptation candidates. The power adaptation candidate (or power scaling value, as mentioned above) is indicated to the at least one UE (200a) by one of:

[0192] 1. adapting a transmit power of the CSI-RS ports themselves using at least one powerControlOffsetSS value or a value update associated with the at least one powerControlOffsetSS value, and

[0193] 2. adapting the transmit power of a PDSCH that is quasi-co-located with the CSI-RS ports using at least one powerControlOffset value or a value update associated with the at least one powerControlOffset value.

[0194] Embodiments herein can report the CSI measurement results using one of the following methods:

[0195] 1. Each CSI resource in the CSI resource-set corresponds to port(s) from only one TRP, reporting configuration is per TRP:

[0196] a. Impact of port-power adaptation is measured by the UE on a per-TRP basis. Each resource in the resource-set corresponds to only one TRP. However, there may be one or more resources in the resource-set corresponding to the same TRP.

[0197] b. Power adaptation candidates are considered per TRP.

[0198] 2. Each CSI resource in a CSI resource-set corresponds to port(s) from one or more TRPs, reporting configuration is per TRP:

[0199] a. Impact of port-power adaptation is measured by UE across TRPs. Some or all resources in the resource-set corresponds to more than one TRP. However, there may be one or more resources in the resource-set corresponding to only one TRP. The power adaptation candidates are considered per TRP.

[0200] 3. Each CSI resource in a CSI resource-set corresponds to port(s) from only one TRP, reporting configuration is per one or more TRP(s):

[0201] a. Impact of port-power adaptation is measured by UE on a per-TRP basis. Each resource in the resource-set corresponds to only one TRP. However, there may be one or more resources in the resource-set corresponding to the same TRP.

[0202] b. Power adaptation candidates are considered across one or more groups of TRP(s).

[0203] 4. Each CSI resource in a CSI resource-set corresponds to port(s) from one or more TRPs, reporting configuration is per one or more TRP(s):

[0204] a. Impact of port-power adaptation is measured by UE across TRPs. Some or all resources in the resource-set corresponds to more than one TRP. However, there may be one or more resources in the resource-set corresponding to only one TRP.

[0205] b. Power adaptation candidates are considered across one or more groups of TRP(s).

[0206] FIG. 8 depicts the process for adapting beam parameter for certain CSI-RS ports / TRPs in the wireless network (1000), according to an embodiment fo the present disclosure.

[0207] In step 1, the network apparatus (100) (e.g., gNB or the like) indicates the candidate list of CSI-RS ports and CSI-RS resources / resource-sets for beam parameter adaptation (widening / shrinking) to all (or a group of) UEs (200a-200c). In step 2, the UE (200a) performs measurements on the CSI-RS signals (based on the indication received in step 1 from network apparatus (100)). Based on that, it then reports back preference and other measurement information related to the beam adaptation candidates. In step 3, the network apparatus (100) will receive the measurement reports from the indicated UEs and their respective preferences on CSI-RS port and TRP beam parameter adaptation. In step 4, the network apparatus (100) decides upon which CSI-RS / antenna port(s), and on which TRP(s), to perform beam parameter adaptation and triggers CSI-RS re-configuration for all (or a group of) UEs (200a-200c). The network apparatus (100) may transmit, to UEs, indication information for beam parameters adapted for subsets of CSI-RS port with power scaling.

[0208] FIGS. 9A and 9B depict an example process for adapting beam-width for certain CSI-RS / antenna ports in a 2-TRP scenario according to an embodiment of the present disclosure, where the network apparatus (100) makes decision on ports that can be beam adapted by considering feedback / measurements from all UEs (200a-200c). Here the grey beams are used to serve the users, instead of the white or black beams.

[0209] Embodiments herein provide an indication to the UEs (200a-200c) to measure all CSI-RS port / TRP beam adaptation candidates. The beam parameter adaptation candidates involve changing one of the beam parameters, where the beam parameters includes at least one of a beam width, a beam angle, a beam tilt, a beam radiation pattern, and a CSI-RS port power. 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 the at least one antenna element, the at least one antenna sub-array and the at least one TRP associated to a logical antenna port.

[0210] Embodiments herein disclose a method to report CSI measurements to the network apparatus (100). The CSI measurement report includes a preference and measurement information for each of the beam parameter adaptation candidates in one of: the CSI-RS port, the single group of CSI-RS ports, and the multiple groups of CSI-RS ports. The CSI-RS port, the group of ports and the multiple groups of ports can be associated with the one or more TRP(s). The CSI measurement report includes at least one of: a RSRP measurement report, a SINR measurement report, a RSRQ measurement report, a CRI, a RI, a LI, a PMI, and a CQI.

[0211] Embodiments herein disclose providing the beam parameter adaptation information as part of CSI-RS configuration, including but not limited to CSI-RS resource configuration and CSI-RS report configuration, in one of the following formats on a per BWP and per CC basis:

[0212] a. The network apparatus (100) can widen / shrink the beam parameter for the chosen set of CSI-RS ports and TRPs with same beam parameter scaling factor.

[0213] b. The network apparatus (100) can widen / shrink the beam parameter, along with power-scaling (power boosting or de-boosting), for the chosen set of CSI-RS port(s) on each TRP with different beam parameter scaling factors.

[0214] c. The network apparatus (100) can widen the beam parameter on a subset of the CSI-RS port(s), along with power-scaling (power boosting or de-boosting), on some TRP(s) and shrink the beam parameter on the remaining CSI-RS port(s), along with power-scaling (power boosting or de-boosting), on other TRP(s), both with different beam parameter scaling factors.

[0215] d. In order to reset the port beam parameters quickly, the network apparatus (100) could set all CSI-RS ports to the same default beam parameter and default power scaling value.

[0216] Embodiments herein disclose providing beam parameter adaptation information and power scaling to the UE. In an embodiment, the power scaling information is indicated to the UE by adapting a transmit power of the CSI-RS ports themselves using a powerControlOffsetSS value or a value update. The powerControlOffsetSS value is a ratio of CSI-RS power to the SSB power. In another embodiment, the power scaling information is indicated to the UE by adapting the transmit power of a PDSCH that is quasi-co-located with the CSI-RS ports using a powerControlOffset value or a value update. The powerControlOffset value is a ratio of PDSCH power to CSI-RS power.

[0217] Embodiments herein report the CSI measurement results using of the following methods:

[0218] 1. Each CSI resource in a CSI resource-set corresponds to port(s) from only one TRP:

[0219] a) Impact of beam adaptation is measured by UE on a per-TRP basis. Each resource in the resource-set corresponds to only one TRP. However, there may be one or more resources in the resource-set corresponding to the same TRP.

[0220] 2. Each CSI resource in a CSI resource-set corresponds to port(s) from one or more TRPs:

[0221] a) Impact of beam adaptation is measured by UE across TRPs. Some or all resources in the resource-set corresponds to more than one TRP. However, there may be one or more resources in the resource-set corresponding to only one TRP.

[0222] FIG. 10 shows various hardware components of the network apparatus (100), according to the embodiments of the present disclosure.

[0223] In an embodiment, the network apparatus (100) includes a processor (110), a communicator (120), a memory (130) and a network energy saving controller (140). The processor (110) is coupled with the communicator (120), the memory (130) and the network energy saving controller (140).

[0224] In an embodiment, the network energy saving controller (140) provides the spatial-domain (SD) sub-configurations and power-domain (PD) sub-configurations by reusing at least one of: the legacy powerControlOffset field and the legacy powerControlOffsetSS field present in the CSI resource. Further, the network energy saving controller (140) saves the network energy in the wireless network (1000) based on the SD and PD sub-configurations.

[0225] In an embodiment, the powerControlOffsetSS value is the ratio of CSI-RS power to the SSB power, and wherein the powerControlOffset value is a ratio of PDSCH power to the CSI-RS power. In an embodiment, the powerControlOffset is indicated in at least one of: the CSI report configuration and the CSI resource configuration for the PD sub-configurations. In an embodiment, the powerControlOffset is differentially indicated in at least one of: the CSI report configuration and the CSI resource configuration for the PD sub-configurations.

[0226] In an embodiment, each SD sub-configuration is associated with its own set of the PD sub-configuration or differential powerControlOffset. The CSI resource is reported per SD-PD combination, where the SD sub-configuration shares a set of PD sub-configurations. In an embodiment, the SD sub-configurations shares the set of PD sub-configuration values.

[0227] In another embodiment, the network energy saving controller (140) sends the configuration information for at least one of: the CSI-RS and the TRP muting to at least one UE from the plurality of UEs (200a-200c). The configuration information includes candidate antenna ports to be muted or adapted. Further, the network energy saving controller (140) receives the first CSI measurement report for the first measurement and preference information associated with the at least one UE from the plurality of UEs (200a-200c) based on the configuration information. The first CSI measurement report can be, for example, but not limited to the RSRP measurement report, the SINR measurement report, the RSRQ measurement report, the CRI, the RI, the LI, the PMI, and the CQI. The CSI measurement report includes the preference and measurement information for each of the port and TRP muting candidate in one of: the CSI-RS port, the 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).

[0228] The network energy saving controller (140) determines 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 (200a-200c) based on the first CSI measurement report. The network energy saving controller (140) indicates to the at least one UE from the plurality of UEs (200a-200c) for the CSI-RS port and the TRP to be muted based on the determination.

[0229] In an embodiment, the network energy saving controller (140) indicates the list of CSI-RS ports and CSI-RS resources for muting to the at least one UE from the plurality of UEs (200a-200c). Further, the network energy saving controller (140) receives a second CSI measurement report for a second measurement and preference information associated with the at least one UE from the plurality of UEs (200a-200c). The second CSI measurement report can be, for example, but not limited to the RSRP measurement report, the SINR measurement report, the RSRQ measurement report, the CRI, the RI, the LI, the PMI, and the CQI. The at least one UE from the plurality of UEs (200a-200c) performs measurement on the CSI-RS signal. Further, the network energy saving controller (140) determines the 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 (200a-200c) based on the second CSI measurement report. Further, the network energy saving controller (140) triggers the CSI-RS re-configuration for the at least one UE from the plurality of UEs (200a-200c) based on the determination.

[0230] In an embodiment, each CSI resource in the CSI resource-set corresponds to the port from one or more TRPs in the first CSI measurement report or the second CSI measurement report.

[0231] In another embodiment, the network energy saving controller (140) sends the CSI-RS configuration information for at least one CSI-RS port power scaling factor to at least one UE from the plurality of UEs (200a-200c). Further, the network energy saving controller (140) receives the CSI measurement report for the measurement and preference information from the at least one UE based on the configuration information. In an embodiment, the CSI measurement report includes the preference and measurement information for each of a port power adaptation candidate in one of: the CSI-RS port, the single group of the CSI-RS port, and multiple groups of the CSI-RS port. 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 TRP. In an embodiment, the CSI measurement report includes at least one of the RSRP measurement, the SINR measurement, the RSRQ measurement, the CRI, the RI, the LI, the PMI, and the CQI.

[0232] Further, the network energy saving controller (140) determines to select at least one CSI-RS port that is power adapted by considering the feedback from the at least one UE from the plurality of UEs. Further, the network energy saving controller (140) indicates to the at least one UE for adapted CSI-RS port.

[0233] Further, the network energy saving controller (140) provides the power-adaptation information as part of the CSI-RS configuration information. The CSI-RS configuration information includes at least one of: the CSI-RS resource configuration and the CSI-RS report configuration on per BWP and per CC basis.

[0234] Further, the network energy saving controller (140) 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 the 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.

[0235] In another embodiment, the network energy saving controller (140) indicates the candidate list of CSI-RS ports and CSI-RS resources for beam parameter adaptation for at least one UE from the plurality of UEs (200a-200c). Further, the network energy saving controller (140) receives the CSI measurement report for measurement and preference information associated with the at least one UE from the plurality of UEs (200a-200c) for the beam parameter adaptation candidate. The CSI measurement report indicates the preference on the CSI-RS port and TRP beam parameter adaptation. The CSI measurement report includes the preference and measurement information for each of the beam parameter adaptation candidates in one of: the CSI-RS port, the single group of CSI-RS ports, and the multiple groups of CSI-RS ports. 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. The CSI measurement report includes at least one of: the RSRP measurement report, the SINR measurement report, the RSRQ measurement report, the CRI, the RI, the LI, the PMI, and the CQI. The UE performs a measurement on the CSI-RS signal based on the indication. The beam parameter adaptation candidate is determined based on at least one beam parameter. The at least one beam parameter comprise at least one of: the beam width, the beam angle, the beam tilt, the beam radiation pattern, and the CSI-RS port power.

[0236] 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. 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.

[0237] Further, the network energy saving controller (140) determines the 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 (200a-200c). Further, the network energy saving controller (140) indicates 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. The power scaling information is indicated to the UE by adapting a transmit power of the CSI-RS ports themselves using the powerControlOffsetSS value or the offset value update (e.g., powerControlOffsetSS + offset value). The powerControlOffsetSS value is a ratio of CSI-RS power to the SSB power. The power scaling information is indicated to the UE by adapting the transmit power of the PDSCH that is quasi-co-located with the CSI-RS ports using the powerControlOffset value or the value update. The powerControlOffset value is a ratio of PDSCH power to CSI-RS power.

[0238] The network energy saving controller (140) is implemented by analog and / or digital circuits such as logic gates, integrated circuits, microprocessors, microcontrollers, memory circuits, passive electronic components, active electronic components, optical components, hardwired circuits and the like, and may optionally be driven by firmware.

[0239] The processor (110) may include one or a plurality of processors. The one or the plurality of processors may be a general-purpose processor, such as a central processing unit (CPU), an application processor (AP), or the like, a graphics-only processing unit such as a graphics processing unit (GPU), a visual processing unit (VPU), and / or an AI-dedicated processor such as a neural processing unit (NPU). The processor (110) may include multiple cores and is configured to execute the instructions stored in the memory (130).

[0240] Further, the processor (110) is configured to execute instructions stored in the memory (130) and to perform various processes. The communicator(120) is configured for communicating internally between internal hardware components and with external devices via one or more networks. The memory (130) also stores instructions to be executed by the processor (110). The memory (130) may include non-volatile storage elements. Examples of such non-volatile storage elements may include magnetic hard discs, optical discs, floppy discs, flash memories, or forms of electrically programmable memories (EPROM) or electrically erasable and programmable (EEPROM) memories. In addition, the memory (130) may, in some examples, be considered a non-transitory storage medium. The term "non-transitory" may indicate that the storage medium is not embodied in a carrier wave or a propagated signal. However, the term "non-transitory" should not be interpreted that the memory (130) is non-movable. In certain examples, a non-transitory storage medium may store data that can, over time, change (e.g., in Random Access Memory (RAM) or cache).

[0241] Although FIG. 10 shows various hardware components of the network apparatus (100) but it is to be understood that other embodiments are not limited thereon. In other embodiments, the network apparatus (100) may include less or more number of components. Further, the labels or names of the components are used only for illustrative purposes and does not limit the scope of the invention. One or more components can be combined together to perform the same or substantially similar function in the network apparatus (100).

[0242] FIG. 11 is a flow chart (S1100) illustrating a method for saving network energy in the wireless network (1000) using various combinations of SD and PD antenna adaptation, according to an embodiment of the present disclosure. The operations (S1102-S1104) are handled by the network energy saving controller (140).

[0243] At step S1102, the method includes providing the SD and PD sub-configurations by reusing at least one of: the legacy powerControlOffset field and the legacy powerControlOffsetSS field present in the CSI resource. At step S1104, the method includes saving the network energy in the wireless network (1000) based on the SD and PD sub-configurations.

[0244] FIG. 12 is a flow chart (S1200) illustrating a method for saving network energy in the wireless network (1000) using port muting, according to an embodiment of the present disclosure. The operations (S1202-S1208) are handled by the network energy saving controller (140).

[0245] At S1202, the method includes sending the configuration information for at least one of: the CSI-RS and the TRP muting to the at least one UE from the plurality of UEs (200a-200c). At S1204, the method includes receiving the first CSI measurement report for the first measurement and preference information associated with the at least one UE from the plurality of UEs (200a-200c) based on the configuration information. At S1206, the method includes determining the 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 (200a-200c) based on the first CSI measurement report. At S1208, the method includes indicating to the at least one UE from the plurality of UEs (200a-200c) for the CSI-RS port and the TRP to be muted based on the determination.

[0246] FIG. 13 is a flow chart (S1300) illustrating a method for saving network energy in the wireless network (1000) using port power adaptation, according to an embodiment of the present disclosure. The operations (S1302-S1308) are handled by the network energy saving controller (140).

[0247] At S1302, the method includes sending the CSI-RS configuration information for the at least one CSI-RS port power scaling factor to the at least one User Equipment (UE) from the plurality of UEs. At S1304, the method includes receiving the CSI measurement report for the measurement and preference information from the at least one UE based on the configuration information. At S1306, the method includes 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. At S1308, the method includes indicating to the at least one UE for adapted CSI-RS port.

[0248] FIG. 14 is a flow chart (S1400) illustrating a method for saving network energy in the wireless network (1000) using beam adaptation, according to an embodiment of the present disclosure. The operations (S1402-S1408) are handled by the network energy saving controller (140).

[0249] At S1402, the method includes indicating the candidate list of CSI-RS ports and the CSI-RS resources for beam parameter adaptation for at least one UE from the plurality of UEs (200a-200c). At S1404, the method includes receiving the CSI measurement report for measurement and preference information associated with the at least one UE from the plurality of UEs (200a-200c) for the beam parameter adaptation candidate. At S1406, the method includes determining the 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 (200a-200c). At S1408, the method includes indicating to the at least one UE from the plurality of UEs for the beam parameter adaptation for the subsets of CSI-RS port with a power scaling information based on the determined first action.

[0250] The network apparatus (100) can be, for example, but not limited to an eNB, an gNB, a 5G transceiver, a base station, or the like. The UE (200a-200c) can be, for example, but not limited to a laptop, a desktop computer, a notebook, a Device-to-Device (D2D) device, a vehicle to everything (V2X) device, a smartphone, a foldable phone, a smart TV, a tablet, a server, an IoT device, an Augmented Reality (AR) device, a Mixed Reality (MR) device, a Virtual Reality (VR) device, an immersive device, an XR device, a metaverse device or the like.

[0251] The various actions, acts, blocks, steps, or the like in the flow charts (S1100-S1400) may be performed in the order presented, in a different order or simultaneously. Further, in some embodiments, some of the actions, acts, blocks, steps, or the like may be omitted, added, modified, skipped, or the like without departing from the scope of the invention.

[0252] The embodiments disclosed herein can be implemented through at least one software program running on at least one hardware device and performing network management functions to control the elements. The elements can be at least one of a hardware device, or a combination of hardware device and software module.

[0253] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and / or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of at least one embodiment, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the embodiments as described herein.

Claims

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; andsaving 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, andwherein 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; andindicating 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; andtriggering 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, andwherein 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; andindicating 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), andwherein 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; andindicating 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, andwherein 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, andwherein 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, andwherein 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); anda 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.

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