Joint antenna adaptation in energy saving networks

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive information from a network node indicating a periodic sequence of network energy saving (NES) states, each NES state associated with an antenna configuration of the network node. The UE may receive one or more downlink transmissions from the network node during the current time period using a maximum number of multiple input multiple output (MIMO) layers associated with an active NES state identified for the current time period based at least in part on the periodic sequence of NES states. Additionally or alternatively, the UE may transmit one or more sounding reference signal (SRS) transmissions to the network node during the current time period using a sounding reference signal (SRS) antenna sounding configuration associated with the active NES state for the current time period. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. patent application No. 17 / 936,245, filed on September 28, 2022, entitled “JOINT ANTENNA ADAPTATION INENERGY SAVING NETWORKS,” which is hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and more particularly to techniques and apparatus associated with joint antenna adaptation in energy-efficient networks. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth or transmit power). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment (UE) to communicate at a city, country, region or global level. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with a cyclic prefix (CP) on the downlink, using CP-OFDM or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) on the uplink, and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful.

[0006] Energy conservation and / or energy efficiency measures are expected to have increasing importance in wireless network operations for a variety of reasons, including climate change mitigation, environmental sustainability, and network cost reduction. For example, although NR generally provides significant energy efficiency improvements per gigabyte over previous generations (e.g., LTE), the adoption of new NR use cases and / or millimeter wave frequencies may require more network sites, more network antennas, greater bandwidth, and / or more frequency bands, which may potentially lead to more efficient wireless networks that still have higher energy requirements and / or cause more emissions than previous generations of wireless networks. In addition, energy accounts for a significant proportion of wireless network operating costs. For example, it is estimated that energy costs account for about a quarter of the total cost of wireless network operations, and more than 90% of network operating costs are spent on energy (e.g., fuel and electricity). The largest share of energy consumption and / or energy costs is the radio access network (RAN), which accounts for about half of the energy consumption of wireless networks, while data centers and fiber optic transmission account for a smaller proportion. Therefore, measures to increase network energy conservation and / or improve network energy efficiency are important factors that may drive the adoption and / or expansion of wireless networks.

[0007] One way to increase energy efficiency in the RAN may be to use dynamic antenna adaptation in network nodes that communicate using massive MIMO technology that tends to consume a lot of power. For example, in an LTE network, a network node that supports massive MIMO technology may communicate using a baseband unit (BBU) that processes baseband signals and communicates with the core network through a physical interface and a remote radio unit (RRU) that performs transmit and receive radio frequency (RF) functions. In an LTE network, the power consumption per cell of the RRU (e.g., in watts) is slightly larger than that of the BBU, and the power consumption per cell does not vary significantly with cell load. However, in an NR network, a network node that supports massive MIMO technology may communicate using a BBU and an active antenna unit (AAU) that consumes significantly more power (e.g., because NR operates at a higher data rate and / or higher bandwidth than LTE). Therefore, a network node that supports massive MIMO communication may enable dynamic antenna adaptation based on current and / or predicted cell loads to improve energy efficiency. For example, when the cell load is high, the network node may turn on all (or most) antenna panels, sub-panels and / or ports to increase capacity, and when the cell load is low, the network node may turn off one or more antenna panels, sub-panels and / or ports to reduce energy consumption. However, in the case where the network node supports dynamic antenna adaptation (e.g., to use energy more efficiently based on cell load or other factors), changes in antenna configuration parameters may need to be adaptive to the antenna configuration used by the served UE to receive downlink signals from the network node and / or send uplink signals to the network node. Summary of the invention

[0008] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include at least one processor and at least one memory communicatively coupled to the at least one processor, the at least one memory storing processor-readable code. The processor-readable code, when executed by the at least one processor, may be configured to cause the UE to receive information from a network node, the information indicating a periodic sequence of network energy saving (NES) states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The processor-readable code, when executed by the at least one processor, may be configured to cause the UE to receive one or more downlink transmissions from the network node during a current time period using a maximum number of multiple-input multiple-output (MIMO) layers associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0009] Some aspects described herein relate to a UE for wireless communication. The UE may include at least one processor and at least one memory communicatively coupled to the at least one processor, the at least one memory storing processor-readable code. When the processor-readable code is executed by the at least one processor, it may be configured to cause the UE to receive information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. When the processor-readable code is executed by the at least one processor, it may be configured to cause the UE to send one or more SRS transmissions to the network node using a sounding reference signal (SRS) antenna sounding configuration associated with an active NES state for the current time period during a current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0010] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The method may include receiving one or more downlink transmissions from the network node during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

[0011] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The method may include sending one or more SRS transmissions to the network node during a current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a UE. The instruction set, when executed by one or more processors of the UE, may cause the UE to receive information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The instruction set, when executed by one or more processors of the UE, may cause the UE to receive one or more downlink transmissions from the network node during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0013] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication. The instruction set, when executed by one or more processors of a UE, may cause the UE to receive information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The instruction set, when executed by one or more processors of the UE, may cause the UE to send one or more SRS transmissions to the network node during a current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The apparatus may include means for receiving one or more downlink transmissions from the network node during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

[0015] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The apparatus may include means for sending one or more SRS transmissions to the network node during a current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0016] Aspects collectively include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network nodes, network entities, wireless communication devices, or processing systems as fully described with reference to the accompanying drawings and the specification and as illustrated in the accompanying drawings and the specification.

[0017] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following specific embodiments better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of the limitations of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to be able to understand the above features of the present disclosure in detail, a more specific description briefly summarized above may be obtained by reference to various aspects (some of which are illustrated in the accompanying drawings). However, it should be noted that the accompanying drawings illustrate only some typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating communication between an example network node and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of dynamic network-side antenna adaptation according to the present disclosure.

[0022] Figure 4 is a diagram illustrating an example of MIMO layer adaptation according to the present disclosure.

[0023] Figures 5 and 6 is a diagram illustrating an example associated with joint antenna adaptation in an energy-efficient network according to the present disclosure.

[0024] Figures 7 and 8 is a flow chart illustrating an example process performed, for example, by a UE according to the present disclosure.

[0025] Fig. 9 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0026] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. It will be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently or in combination with any other aspect of the present disclosure. For example, the aspect of any amount set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method that is practiced using other structures, functionality, or structure and functionality other than the various aspects of the disclosure set forth herein or different from the various aspects of the disclosure set forth herein. Any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.

[0027] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0028] Various aspects are generally related to using a periodic sequence of network energy saving (NES) states to achieve joint antenna adaptation in energy-saving networks. Some aspects are more specifically related to enabling a network node to operate in different NES states over time based on a periodic sequence of NES states (e.g., a default or normal mode, and one or more sleep or low power modes associated with a configuration for saving power and maintaining network operation), wherein each NES state may be associated with an antenna configuration of the network node. For example, in some aspects, at a network node, the number of antenna panels, antenna sub-panels, and / or antenna ports used at any particular time may depend on the NES state that the network node is in at that time. Therefore, in some aspects, a network node may configure a periodic sequence of NES states for one or more served UEs, which enables the served UE to adjust the local antenna configuration for receiving downlink signals from the network node or sending uplink signals to the network node based on the antenna configuration used at the network node. For example, in some aspects, a served UE may adjust the maximum number of downlink multiple-input multiple-output (MIMO) layers for receiving downlink transmissions from the network node in the current time interval based on the NES state that the network node is in during the current time interval. Additionally or alternatively, the served UE may adapt a sounding reference signal (SRS) configuration (e.g., SRS antenna sounding configuration, and / or SRS resource or SRS resource set) for performing SRS transmission in a current time interval based on the NES state in which the network node operates.

[0029] Certain aspects of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques may enable a semi-static approach to reduce network energy consumption by associating each NES state in a periodic sequence of NES states with a corresponding antenna configuration for a network node. In addition, in some examples, the described techniques may be used to dynamically adjust the maximum number of downlink MIMO layers and / or SRS configuration used at a UE based on the current antenna configuration for the network node, which may achieve power savings at the UE when the network node communicates using an antenna configuration that disables one or more antenna panels, sub-panels, and / or ports (e.g., during time intervals associated with low downlink traffic), and / or achieve improved performance when the network node communicates using an antenna configuration that turns on one or more antenna panels, sub-panels, and / or ports (e.g., during time intervals when the cell load is high).

[0030] Figure 11 is a diagram illustrating an example of a wireless network according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network or elements of a 4G (e.g., Long Term Evolution (LTE)) network, as well as other examples. The wireless network 100 may include one or more network nodes 110 (shown as network node (NN) 110a, network node 110b, network node 110c, and network node 110d), one UE 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. The network node 110 is an entity that communicates with the UE 120. As shown in the figure, the network node 110 may include one or more network nodes. For example, the network node 110 may be a converged network node, which means that the converged network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, the network node 110 may be a decomposed network node (sometimes referred to as a decomposed base station), which means that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed between two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0031] In some examples, the network node 110 is or includes a network node that communicates with the UE 120 via a radio access link, such as an RU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, the network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or communicates with the core network via a backhaul link, such as a CU. In some examples, the network node 110 (such as an aggregated network node 110 or a decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, or one or more DUs. For example, the network node 110 may include an NR network node, an LTE network node, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmit receive point (TRP), a DU, a RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, and / or a RAN node. In some examples, network nodes 110 may be interconnected to each other or to one or more other network nodes 110 in wireless network 100 via various types of fronthaul interfaces, midhaul interfaces, or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks) using any suitable transport network.

[0032] Each network node 110 may provide communication coverage for a particular geographic area. In the 3rd Generation Partnership Project (3GPP), the term "cell" may refer to a coverage area of ​​a network node 110 or a network node subsystem serving the coverage area, depending on the context in which the term is used.

[0033] The network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by a UE 120 associated with the femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or a home network node.

[0034] The wireless network 100 may be a heterogeneous network that includes different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, or relay network nodes. These different types of network nodes 110 may have different transmit power levels, different coverage areas, or different effects on interference in the wireless network 100. For example, a macro network node may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico network node, a femto network node, and a relay network node may have a lower transmit power level (e.g., 0.1 watt to 2 watts). Figure 1 In the example shown in , network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. A network node may support one or more (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile network node 110 (e.g., a mobile network node).

[0035] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, a "base station" or "network node" may refer to a CU, a DU, a RU, a near real-time (near RT) RAN intelligent controller (RIC), and / or a non-real-time (non-RT) RIC. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with the network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of a plurality of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeatedly perform at least a portion of the function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one of the base station functions, but not another base station function. In this way, a single device may include more than one base station.

[0036] The network controller 130 may be coupled to or in communication with a set of network nodes 110 and may provide coordination and control for the network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link. The network nodes 110 may also communicate directly with each other or indirectly via a wireless or wired backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or the network controller 130 may include a CU or a core network device.

[0037] In some examples, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile network nodes 110 (e.g., mobile network nodes). In some examples, the network nodes 110 may be interconnected with each other or to one or more other network nodes 110 or network nodes (not shown) in the wireless network 100 using any suitable transport network through various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0038] The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a network node 110 or a UE 120) and transmit the data transmissions to a downstream station (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown in , a network node 110d (e.g., a relay network node) may communicate with a network node 110a (e.g., a macro network node) and a UE 120d to facilitate communications between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay network node, or a relay.

[0039] UE 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, an access terminal, a terminal, a mobile station, or a subscriber unit. UE 120 may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, a UE function of a network node, or any other suitable device configured to communicate via a wireless medium.

[0040] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, or location tags, which may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices, or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. UE 120 may be included inside a housing that houses components of UE 120, such as a processor component or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, or electrically coupled.

[0041] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as a radio technology or air interface. Frequency may also be referred to as a carrier or frequency channel. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0042] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as being performed by network node 110.

[0043] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, or channels by frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency ranges designated FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. Similar naming issues sometimes arise in conjunction with FR2, which is often (interchangeably) referred to as the "millimeter wave" band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0044] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz–24.25GHz). The bands falling within FR3 can inherit FR1 characteristics or FR2 characteristics, and thus the features of FR1 or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0045] Considering the above examples, unless otherwise specifically stated, if the term "sub-6 GHz" is used herein, it may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, if the term "millimeter wave" is used herein, it may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a, FR4-1, or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, or FR5) may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0046] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive information from the network node 110 indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node 110; and receive one or more downlink transmissions from the network node 110 during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states. Additionally or alternatively, the communication manager 140 may receive information from the network node 110 indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node 110; and send one or more SRS transmissions to the network node 110 during the current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states. Additionally or alternatively, the communications manager 140 may perform one or more other operations described herein.

[0047] Figure 2 200 is a diagram illustrating an example of a network node communicating with a UE in a wireless network according to the present disclosure. The network node may correspond to Figure 1 Similarly, the UE may correspond to a network node 110. Figure 1 UE 120. Network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T ≥ 1). UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R ≥ 1). Figure 2 The network node 110 depicted in FIG. 1 includes one or more radio frequency components, such as an antenna 234 and a modem 254. In some examples, the network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0048] At the network node 110, the transmit processor 220 may receive data intended for the UE 120 (or a set of UEs 120) from the data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQI) received from the UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and may provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) MIMO processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, overhead symbols, or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may also process (e.g., convert to analog, amplify, filter, or up-convert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a to 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0049] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the network node 110 or other network nodes 110, and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers and / or one or more processors. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0050] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0051] One or more antennas (e.g., antennas 234a to 234t or antennas 252a to 252r) may include or may be included in one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, etc. An antenna panel, antenna group, set of antenna elements, or antenna array may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, or coupled to one or more transmit or receive components (such as Figure 2 One or more antenna elements of one or more components).

[0052] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and sent to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the methods described herein.

[0053] At the network node 110, uplink signals from the UE 120 or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component of the modem 232, shown as DEMOD), detected by the MIMO detector 236 where applicable, and further processed by the receive processor 238 to obtain decoded data and control information transmitted via the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and provide the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink or uplink communication. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of an antenna 234, a modem 232, a MIMO detector 236, a receive processor 238, a transmit processor 220, or a TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein.

[0054] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or Figure 2Any other components of the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, or the like may perform one or more techniques associated with joint antenna adaptation in energy-efficient networks, as described in more detail elsewhere herein. Figure 2 Any other component of the Figure 7 The process 700 Figure 8 800 or other processes as described herein. Memory 242 and memory 282 may store data and program codes for network node 110 and UE 120, respectively. In some examples, memory 242 or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code or program code) for wireless communication. For example, the one or more instructions, when executed by one or more processors of network node 110 or UE 120 (e.g., directly executed, or executed after compilation, conversion, and / or interpretation), may cause the one or more processors, UE 120, or network node 110 to perform or direct, for example, Figure 7 The process 700 Figure 8 The operations of the process 800 or other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, or interpreting instructions, etc.

[0055] In some aspects, the UE 120 includes means for receiving information from the network node 110, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; and / or means for receiving one or more downlink transmissions from the network node 110 during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states. Additionally or alternatively, the UE 120 includes means for receiving information from the network node 110, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node 110; and / or means for sending one or more SRS transmissions to the network node 110 during the current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states. Means for UE 120 to perform operations described herein may include, for example, one or more of communications manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0056] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or components in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station or network equipment can be implemented in an aggregated or decomposed architecture. For example, a base station (such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a TRP or a cell, etc.) or one or more units (or one or more components) that perform base station functionality can be implemented as an aggregated base station (also called an independent base station or a monolithic base station) or a decomposed base station. "Network entity" or "network node" may refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, and / or one or more RUs).

[0057] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A decomposed base station (e.g., a decomposed network node) may be configured to utilize a protocol stack that is physically or logically distributed between two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), and the like.

[0058] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a decomposed base station may be utilized in an IAB network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate the scaling of a communication system by separating base station functionality into one or more units that can be deployed separately. A decomposed base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented virtually for at least one unit, which may enable flexibility in network design. Individual units of a decomposed base station may be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0059] Figure 3300 is a diagram illustrating an example of dynamic network-side antenna adaptation according to the present disclosure. For various reasons, including climate change mitigation, environmental sustainability, and network cost reduction, it is expected that energy saving and / or energy efficiency measures will have increasing importance in wireless network operations. For example, although NR generally provides significant energy efficiency improvements per gigabyte over previous generations (e.g., LTE), the adoption of new NR use cases and / or millimeter wave frequencies may require more network sites, more network antennas, greater bandwidth, and / or more frequency bands, which may potentially lead to more efficient wireless networks that still have higher energy requirements and / or cause more emissions than previous generations of wireless networks. In addition, energy accounts for a significant proportion of wireless network operating costs. For example, it is estimated that energy costs account for about a quarter of the total cost of wireless network operations, and more than 90% of network operating costs are used for energy (e.g., fuel and electricity consumption). The largest proportion of energy consumption and / or energy costs is RAN, which accounts for about half of the energy consumption of wireless networks, while data centers and fiber optic transmission account for a smaller proportion. Therefore, measures to increase network energy saving and / or improve network energy efficiency are important factors that may drive the adoption and / or expansion of wireless networks.

[0060] One way to increase energy efficiency in a RAN may be to use dynamic antenna adaptation in network nodes that communicate using massive MIMO technology that tends to consume a lot of power. For example, in an LTE network, a network node that supports massive MIMO technology may communicate using a baseband unit (BBU) that processes baseband signals and communicates with the core network through a physical interface and a remote radio unit (RRU) that performs transmit and receive radio frequency (RF) functions. In an LTE network, the per-cell power consumption (e.g., in watts) of the RRU is slightly larger than that of the BBU, and the per-cell power consumption does not vary significantly with cell load. However, in an NR network, a network node that supports massive MIMO technology may communicate using a BBU and an active antenna unit (AAU) that consumes significantly more power than the BBU and RU associated with the network node in an LTE network (e.g., because NR operates at a higher data rate and / or a higher bandwidth than LTE).

[0061] For example, when the cell load is low (e.g., 0%), the BBU and AAU of a network node in an NR network may consume 2.4 times the power consumed by the BBU and RRU in an LTE network node, when the cell load is medium (e.g., 50%), the BBU and AAU of a network node in an NR network may consume 2.6 times the power consumed by the BBU and RRU in an LTE network node, or when the cell load is high (e.g., 100%), the BBU and AAU of a network node in an NR network may consume 3 times the power consumed by the BBU and RRU in an LTE network node, where "cell load" in this context generally refers to the proportion of frequency resources being utilized within a carrier at a given time. In addition, in an NR network node, the AAU generally consumes significantly more power than the BBU, and the proportion of power consumption attributable to the AAU increases as the cell load increases (e.g., the power consumption of the BBU is relatively static regardless of the cell load, while the power consumption of the AAU increases as the cell load increases). Therefore, because the AAU represents the most power-hungry component in an NR network node supporting massive MIMO technology, improving the energy efficiency of the AAU can have a significant impact on the overall network energy consumption.

[0062] Therefore, if Figure 3 As shown, in operation 310, a network node supporting massive MIMO communication may enable dynamic antenna adaptation based on current and / or predicted cell loads to improve energy efficiency. For example, to enable massive MIMO communication, a network node may typically need to have multiple co-located antenna panels, each antenna panel including multiple antenna ports. For example, Figure 3 An example antenna panel 320 is shown that includes four (4) sub-panels, each of which includes a number of antenna ports (shown as intersecting dashed and solid lines) that are each mapped to one or more physical antennas. Figure 3 , each diagonal line included in the antenna panel 320 corresponds to one (1) antenna port, and the color of the diagonal line indicates the polarization of the antenna port (e.g., a solid diagonal line may correspond to an antenna port with horizontal polarization, a dashed diagonal line may correspond to an antenna port with vertical polarization, and vice versa). In general, each antenna panel 320 is equipped with various power amplifiers and antenna subsystems that consume a large amount of power. Therefore, in order to save power or otherwise utilize energy more efficiently, the network node may dynamically adjust the antenna configuration based on current and / or predicted cell load. For example, when the cell load is low or predicted to be low, the network node may turn off one or more antenna panels, sub-panels, transceiver units (TxRUs) and / or antenna ports to reduce energy consumption, and when the cell load is high or predicted to be high, the network node may turn on most or all antenna panels, sub-panels, TxRUs and / or antenna ports to increase capacity.

[0063] Figure 4 4 is a diagram illustrating an example 400 of MIMO layer adaptation according to the present disclosure. Specifically, Figure 4 An example 410 of downlink MIMO layer adaptation that may be performed at a UE and an example 420 of uplink MIMO layer adaptation that may be performed at a UE in a wireless network are shown.

[0064] Specifically, as described herein, a UE may be configured to perform downlink MIMO layer adaptation, wherein the maximum number of downlink MIMO layers that the UE is to use to receive downlink transmissions from a network node is adjusted to achieve energy saving at the UE. For example, in some cases, the network node may send one or more RRC messages to the UE to indicate the maximum number of MIMO layers for each cell used for downlink transmissions (e.g., using a maxMIMO-Layers parameter included in a PDSCH-ServingCellConfig information element (IE)). Thus, in order to control energy consumption and / or downlink performance at the UE, the network node may indicate the maximum number of downlink MIMO layers, which is typically related to the number of antennas that the UE is to use to receive downlink transmissions from the network node. In this way, the network node may dynamically configure the maximum number of downlink MIMO layers to adapt to dynamic traffic patterns and enable corresponding power savings at the UE (e.g., increasing the maximum number of downlink MIMO layers to improve downlink performance when there is a large amount of downlink traffic, and / or reducing the maximum number of downlink MIMO layers to save power at the UE when the downlink traffic has low capacity).

[0065] In addition, in some cases, the network node and / or UE may support enhancements for adjusting the maximum number of downlink MIMO layers, such as supporting a maximum number of downlink MIMO layers per downlink bandwidth part (BWP). In this case, the network node may configure the maximum number of downlink MIMO layers per downlink BWP so that the UE can operate with a reduced number of antennas and / or a reduced number of receiver chains to save power in certain scenarios (e.g., a small amount of downlink traffic). For example, in Figure 4 In the example 410, a network node configures two (2) downlink BWPs (shown as DL BWP#1 and DL BWP#2) for a UE to accommodate different traffic patterns and / or UE power saving requirements. Figure 4, a first downlink BWP may be associated with a wideband configuration having up to four (4) downlink MIMO layers (e.g., four (4) receive (Rx) antennas for receiving downlink traffic), which may be appropriate when the UE requires a high downlink data rate. As further shown, a second downlink BWP may be associated with a narrowband configuration having up to two (2) downlink MIMO layers (e.g., using two (2) or more Rx antennas to receive downlink traffic), which may be appropriate when the downlink traffic is low and / or to reduce power consumption or increase power savings at the UE. In addition, BWP switching may be used to facilitate switching between different scenarios (e.g., the network node may indicate a BWP switch to indicate a change in the maximum number of downlink MIMO layers used at the UE).

[0066] Additionally or alternatively, the UE may be configured to perform uplink MIMO layer adaptation, wherein the maximum number of uplink MIMO layers to be used by the UE on the uplink may be adjusted to improve uplink reliability and / or to achieve energy saving at the UE. For example, in some cases, the network node may configure the maximum number of uplink MIMO layers per BWP for codebook-based physical uplink shared channel (PUSCH) transmissions (e.g., using the maxRank field included in the pusch-Config IE). However, for non-codebook-based PUSCH transmissions, the network node may configure the maximum number of uplink MIMO layers on a per-cell level (e.g., using the maxMIMO-Layers field included in the PUSCH-ServingCellConfig IE). For example, in Figure 4 In the example 420, a scenario is depicted in which a network node configures two (2) uplink BWPs (shown as UL BWP #1 and UL BWP #2) for a UE to enable implicit non-codebook based MIMO configuration for each uplink BWP. For example, for non-codebook based uplink transmission, when the network node indicates multiple SRS resources, the number of uplink ports used by the UE for transmission may be determined based on an SRS resource indicator (SRI) or based on one or more SRIs. In general, the SRI may depend on the maximum number of uplink MIMO layers per cell, L. max , which may be indicated by the maxMIMO-Layers parameter in the PUSCH-ServingCellConfig IE, or determined by the UE's capabilities if the maxMIMO-Layers parameter is not provided in the PUSCH-ServingCellConfig IE. In addition, the SRI may depend on the number of SRS resources N in the SRS resource set associated with the SRI. SRSTherefore, in some cases, the number of SRS resources associated with non-codebook usage may be configured for each BWP, which may implicitly limit the maximum scheduled uplink rank. Figure 4 In the example, up to four (4) uplink MIMO layers (L max =4), and the first uplink BWP is configured with four (4) SRS resources (N SRS =4), whereby the maximum scheduling rank in the first uplink BWP is 4, and the UE can use up to 4 transmit (Tx) antennas to perform uplink transmission in the first uplink BWP. In addition, the second uplink BWP is configured with two (2) SRS resources (N SRS =2), whereby the maximum scheduling rank in the second uplink BWP is 2, and the UE can perform uplink transmission using two or more Tx antennas. In addition, in a similar manner to downlink MIMO adaptation, BWP switching can be used to switch between different scenarios.

[0067] Therefore, as described herein, the UE may be configured to adjust the maximum number of downlink MIMO layers and / or the maximum number of uplink MIMO layers to adapt to different traffic patterns and / or to achieve energy saving in different scenarios. However, in the case where the network node supports dynamic antenna adaptation (e.g., to use energy more efficiently based on cell load or other factors), the change of antenna configuration parameters may need to be adaptive to the antenna configuration used by the UE to receive downlink signals from the network node and / or to send uplink signals to the network node. For example, as described herein, the network node may support dynamic antenna adaptation technology that allows the network node to efficiently and dynamically turn off one or more antenna ports, TxRUs, antenna panels, and / or TRPs when there is no downlink traffic or low downlink traffic. Therefore, as the number of Tx antenna ports and / or TRPs used by the network node decreases, the maximum number of downlink MIMO layers for the UE being served may be reduced accordingly. Although the network node may implement dynamic BWP switching to dynamically adjust the maximum number of downlink MIMO layers, or otherwise dynamically notify the UE about the updated maximum number of downlink MIMO layers, this relies on some shortcomings and limitations suffered by the BWP switching framework. For example, in the case where the network node and / or UE only supports one BWP (e.g., the UE only supports basic BWP operation with associated limitations), dynamically adjusting the maximum number of downlink MIMO layers via BWP switching will not work. In addition, while dynamically adjusting the maximum number of downlink MIMO layers may be useful when dynamic BWP switching is possible, the network node may have to configure BWP switching relatively frequently to achieve optimal network energy savings, which may introduce delays and / or additional power consumption at the UE (e.g., due to the need to perform frequent BWP switching). In addition, adjusting the uplink MIMO configuration may present similar challenges.

[0068] Various aspects are generally related to using a periodic sequence of NES states to achieve joint antenna adaptation in energy-saving networks. Some aspects are more specifically related to enabling a network node to operate in different NES states over time based on a periodic sequence of NES states (e.g., a default or normal mode, and one or more sleep or low-power modes associated with a configuration for saving power and maintaining network operation), wherein each NES state may be associated with an antenna configuration of the network node. For example, in some aspects, at a network node, the number of antenna panels, antenna sub-panels, and / or antenna ports used at any particular time may depend on the NES state that the network node is in at that time. Therefore, in some aspects, a network node may configure a periodic sequence of NES states for one or more served UEs, which enables the served UE to adjust the local antenna configuration for receiving downlink signals from the network node or sending uplink signals to the network node based on the antenna configuration used at the network node. For example, in some aspects, a served UE may adjust the maximum number of downlink MIMO layers for receiving downlink transmissions from the network node in the current time interval based on the NES state that the network node is in during the current time interval. Additionally or alternatively, the served UE may adapt an SRS configuration (eg, SRS antenna sounding configuration, and / or SRS resource or SRS resource set) for performing SRS transmission in the current time interval based on the NES state in which the network node operates.

[0069] Certain aspects of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages. In some examples, the described techniques may enable a semi-static approach to reduce network energy consumption by associating each NES state in a periodic sequence of NES states with a corresponding antenna configuration for a network node. In addition, in some examples, the described techniques may be used to dynamically adjust the maximum number of downlink MIMO layers and / or SRS configuration used at a UE based on the current antenna configuration for the network node, which may achieve power savings at the UE when the network node communicates using an antenna configuration that disables one or more antenna panels, sub-panels, and / or ports (e.g., during time intervals associated with low downlink traffic), and / or achieve improved performance when the network node communicates using an antenna configuration that turns on one or more antenna panels, sub-panels, and / or ports (e.g., during time intervals when the cell load is high).

[0070] Figure 5 is a diagram illustrating an example 500 associated with joint antenna adaptation in an energy-efficient network according to the present disclosure. Figure 5As shown, example 500 includes communications between a network node (e.g., network node 110) and a UE (e.g., UE 120). In some aspects, the network node and the UE may communicate in a wireless network, such as wireless network 100. The network node and the UE may communicate via a wireless access link, which may include an uplink and a downlink.

[0071] like Figure 5 As shown, in a first operation 510, the network node may send and the UE may receive information indicating a periodic sequence of NES states, wherein each NES state may be associated with an antenna configuration of the network node. For example, as described herein, a potential approach to increasing energy efficiency in the RAN may be to adjust the network energy consumption model to achieve more efficient operation dynamically and / or semi-statically. For example, power consumption in the RAN may generally be divided into a dynamic part and a static part, in which power is consumed only when data transmission and / or reception is ongoing, and in which power is always consumed to maintain the operation of the radio access device even if data transmission and / or reception is not ongoing. Therefore, a potential approach to improving network energy conservation may be to adjust the power consumption model from a network perspective by reducing the relative energy consumption of downlink and / or uplink communications (e.g., taking into account factors such as power amplification (PA) efficacy, number of TxRUs, and / or network load), enabling network sleep states and associated transition times, and / or defining appropriate benchmark parameters and / or configurations. For example, different NES states may be configured to enable granular adjustments to transmission and / or reception to reduce energy consumption using techniques in the time, frequency, spatial and / or power domains along with potential support and / or feedback from the UE and / or potential UE assistance information.

[0072] Therefore, if Figure 5As shown, the network node can be configured to operate in different NES states over time, wherein each NES state can use one or more techniques to adjust transmission and / or reception in the time domain, frequency domain, air domain and / or power domain. For example, in some aspects, the NES state may include a normal operating mode (also referred to as a legacy mode or a default mode), and one or more sleep modes associated with power consumption lower than the normal operating mode. In general, the network node can be transformed between different NES states to save power and maintain network operation (e.g., to minimize the impact on key performance indicators (KPIs) such as spectrum efficiency, capacity, user perceived throughput (UPT), delay, UE power consumption, complexity, handover performance, call drop rate and / or initial access performance). In addition, the network node can be transformed between different sleep modes based on traffic demand (e.g., when the traffic demand is slightly lower than usual, enter a shallow sleep mode, and / or when the traffic demand is much lower than usual, enter a deep sleep mode), and different sleep modes can be associated with different energy-saving technologies (e.g., one or more antenna panels, antenna ports and / or radio frequency (RF) chains can be turned off in a deep sleep mode but remain connected in a shallow sleep mode). Thus, in some aspects, normal operating modes and different sleep modes may differ in power consumption and may be associated with different transition times (e.g., the time to transition to or from a deep sleep mode may be longer than the time to transition to or from a light sleep mode).

[0073] In some cases, as described herein, a NES state may generally correspond to a specific set of configurations, communication parameters, and / or UE behaviors. For example, a NES state may include a set of configurations, communication parameters, and / or UE behaviors associated with one or more energy-saving techniques implemented in the time domain, frequency domain, spatial domain, and / or power domain to reduce energy consumption. For example, a network node may be configured to not send synchronization signal blocks (SSBs) in a first NES state (e.g., a NES state without SSBs) to reduce energy consumption, and may be configured to employ other energy-saving techniques in a second NES state, such as shutting down one or more antenna ports and / or antenna panels. In addition, in some cases, a NES state may be associated with a set of configurations, communication parameters, and / or UE behaviors associated with a normal or legacy network operating mode. Therefore, because one design goal of energy-saving wireless networks is to achieve more efficient operations dynamically and / or semi-statically, a network node may configure a semi-static mode to achieve network energy saving. For example, as Figure 5 As shown, a semi-static mode (e.g., a mode configured via RRC signaling) may include a sequence of NES states that a network node follows according to a given periodicity (e.g., Figure 5In the embodiment of the present invention, the network node operates according to a first NES state shown as NES1 for a first time period, then operates in a flexible mode for a second time period, then operates according to a second NES state shown as NES2 for a third time period, and then the pattern repeats). In addition, in the case where the semi-static pattern (or periodic NES state sequence) includes a time period associated with the flexible mode, the network node may operate according to any suitable NES state during the time period corresponding to the flexible mode (for example, depending on the current traffic situation), and the NES state selected by the network node for the time period corresponding to the flexible mode may be dynamically indicated to the UE.

[0074] In some aspects, as described herein, each NES state in the sequence may be associated with a set of configurations, communication parameters, and / or UE behaviors, which may include at least an antenna configuration used by the network node in the corresponding NES state. For example, in a first NES state, the network node may operate using an antenna configuration in which thirty-two (32) antenna ports are active (e.g., to provide maximum throughput), and a second NES state may be associated with an antenna configuration in which eight (8) antenna ports are active (e.g., to save energy relative to the first NES state). In addition, it should be understood that specific antenna configurations may be shared between different NES states. For example, in some aspects, the network node may use 32 antenna ports in a first NES state and a second NES state, and may avoid sending SSBs in the second NES state to save energy relative to the first NES state (e.g., each NES state may be associated with one or more energy saving techniques that may be implemented in the time domain, frequency domain, spatial domain, and / or power domain). Therefore, as described herein, each NES state in a periodic sequence of NES states may be associated with a corresponding antenna configuration of the network node, but the same antenna configuration may be used in more than one NES state.

[0075] like Figure 5 As further shown in FIG. 5 , in a second operation 520, the UE may adjust the downlink antenna configuration to be used in the current time interval based on the maximum number of MIMO layers associated with the active (or current) NES state. For example, based on a periodic NES state sequence configured by the network node, the UE may be able to determine the NES state of the network node when operating at various time intervals, and the UE may adjust the downlink antenna configuration (e.g., the number of Rx antennas used at the UE) in each time interval based on the maximum number of downlink MIMO layers associated with the NES state that is active in each time interval. For example, given Figure 5, the UE may determine the maximum number of MIMO layers associated with the first NES state. Then, for the duration that the first NES state is active, the UE may adjust the downlink antenna configuration based on the maximum number of downlink MIMO layers associated with the first NES state. In addition, the UE may employ a similar approach to adjust the downlink antenna configuration during subsequent time periods associated with the flexible mode (e.g., depending on which NES state is dynamically indicated to be active during the time period associated with the flexible mode) and subsequent time periods when the second NES state is active. Therefore, in a third operation 530, the UE may receive downlink transmissions from the network node during different time periods using the maximum number of downlink MIMO layers associated with the corresponding NES states that are active during the different time periods. In other words, the maximum number of downlink MIMO layers (or Rx antennas) used by the UE to receive downlink transmissions from the network node may change dynamically over time depending on a periodic NES state sequence that defines which NES state is active at any particular time (e.g., so that the maximum number of downlink MIMO layers used at the UE appropriately captures the dynamic adaptation of the number of antennas or antenna ports used by the network node in each NES state).

[0076] In some aspects, the network node and the UE may support one or more techniques to indicate or otherwise define the maximum number of downlink MIMO layers associated with each NES state. For example, in some aspects, the network node may send RRC signaling or other suitable information to the UE to configure each NES state supported by the network node (e.g., each NES state included in a periodic NES state sequence, and any other NES state that the network node may support to improve performance or save energy), and the NES configuration associated with each NES state may include an IE or another suitable parameter to indicate the maximum number of downlink MIMO layers associated with the corresponding NES state. For example, Figure 5 An example 540 is depicted in which a maximum number of downlink MIMO layers is indicated in an NES configuration associated with an NES state. Figure 5 , a first NES state (shown as NES1) is associated with a first maximum number x of downlink MIMO layers; a second NES state (shown as NES2) is associated with the same maximum number of downlink MIMO layers as the first NES state (e.g., when the network node switches from the first NES state to the second NES state, the maximum number of downlink MIMO layers remains unchanged, and vice versa); and a third NES state (shown as NES3) is associated with a different maximum number y of downlink MIMO layers. Thus, in some aspects, the maximum number of downlink MIMO layers may be independently configured for each NES state.

[0077] Additionally or alternatively, the network node may send RRC signaling or other suitable information to the UE to configure a mapping between different numbers of antenna ports used at the network node and the maximum number of downlink MIMO layers associated with each corresponding number of antenna ports used at the network node. In this case, the NES configuration associated with each NES state may indicate the number of antenna ports used by the network node when operating in the corresponding NES state, and the UE may refer to the mapping to identify the maximum number of downlink MIMO layers associated with the active NES state. For example, Figure 5 An example 550 is depicted in which a network node configures a mapping between different numbers of antenna ports used at the network node and a maximum number of downlink MIMO layers associated with each corresponding number of antenna ports. Figure 5 , the mapping indicates that a network node antenna configuration including thirty-two (32) antenna ports is mapped to a maximum of x downlink MIMO layers, a network node antenna configuration including sixteen (16) antenna ports is mapped to a maximum of y downlink MIMO layers, and a network node antenna configuration including eight (8) antenna ports is mapped to a maximum of z downlink MIMO layers. Thus, during a time interval when the current active NES state is a first NES state or a second NES state, each of which is associated with an antenna configuration including 32 antenna ports, the UE may adjust the downlink antenna configuration to use a maximum of x downlink MIMO layers. Additionally or alternatively, during a time interval when the current active NES state is a third NES state associated with 16 antenna ports, the UE may adjust the downlink antenna configuration to use a maximum of y downlink MIMO layers. Additionally or alternatively, during a time interval when the current active NES state is associated with 8 antenna ports, the UE may adjust the downlink antenna configuration to use a maximum of z downlink MIMO layers. Thus, in some aspects, the network node may generally configure a mapping between different numbers of antenna ports and corresponding maximum numbers of downlink MIMO layers, and the UE may refer to the mapping to identify the maximum number of downlink MIMO layers to be used in the time interval based on the number of antenna ports associated with the NES state that is active during the time interval.

[0078] In some aspects, the maximum number of downlink MIMO layers may be configured per cell configuration and / or in a BWP configuration (e.g., the maximum number of downlink MIMO layers may be configured per cell or per BWP, as described above with reference to Figure 4Detailed description thereof). Thus, when periodic NES states are configured and the maximum number of downlink MIMO layers that the UE is using to communicate with the network node is configured in the cell and / or BWP, the UE may use one or more techniques to identify which configuration to use to identify the maximum number of downlink MIMO layers. For example, where a periodic NES state sequence is defined per BWP, the maximum number of downlink MIMO layers associated with the configured NES state may override any maximum number of downlink MIMO layers that may be indicated in the BWP configuration, which also overrides any maximum number of downlink MIMO layers that may be indicated in the cell configuration (e.g., where a periodic NES state sequence is defined per BWP, the maximum number of downlink MIMO layers may be determined by the NES state configuration). Alternatively, where a periodic NES state sequence is defined per cell, the UE may use the maximum number of downlink MIMO layers associated with the NES configuration when the network node is operating in a mode other than the legacy (e.g., default or normal) mode. Otherwise, in the case where the periodic NES state sequence is defined per cell and the network node operates in the legacy mode, the UE may use the maximum number of downlink MIMO layers associated with the active BWP configuration. Alternatively, in the case where the periodic NES state sequence is configured to operate in a group of one or more BWPs, the UE may apply the maximum number of downlink MIMO layers associated with the NES state configuration when communicating using a BWP associated with the periodic NES state sequence in the group of BWPs, and may otherwise use the maximum number of downlink MIMO layers associated with the active BWP configuration in other BWPs. Additionally or alternatively, in the case where the network node operates in the flexible mode, the UE may use the maximum number of downlink MIMO layers associated with the active BWP configuration, and if the maximum number of downlink MIMO layers is not configured for the active BWP, the maximum number of downlink MIMO layers associated with the cell configuration may be used.

[0079] Figure 6 6 is a diagram illustrating an example 600 associated with joint antenna adaptation in an energy-efficient network according to the present disclosure. Figure 6 As shown, example 600 includes communications between a network node (e.g., network node 110) and a UE (e.g., UE 120). In some aspects, the network node and the UE may communicate in a wireless network, such as wireless network 100. The network node and the UE may communicate via a wireless access link, which may include an uplink and a downlink.

[0080] like Figure 6As shown, in a first operation 610, the network node may send and the UE may receive information indicating a periodic sequence of NES states, wherein each NES state may be associated with an antenna configuration of the network node. For example, as described elsewhere herein, the network node may be configured to operate in different NES states over time, wherein each NES state may use one or more techniques to adjust transmission and / or reception in the time domain, frequency domain, spatial domain, and / or power domain. In some aspects, each NES state in the periodic sequence of NES states may be associated with a set of configurations, communication parameters, and / or UE behaviors, which may include at least the antenna configuration used by the network node in the corresponding NES state. For example, in a first NES state, the network node may operate using an antenna configuration in which thirty-two (32) antenna ports are active, and a second NES state may be associated with an antenna configuration in which eight (8) antenna ports are active (e.g., to save energy relative to the first NES state). In addition, in some aspects, specific antenna configurations may be shared between different NES states. For example, the network node may use the same number of antenna ports in the first NES state and the second NES state (e.g., the network node does not perform dynamic antenna adaptation when switching between the first NES state and the second NES state), and the network node may employ one or more other energy-saving techniques in the time domain, frequency domain, spatial domain, and / or power domain to save energy in the first NES state and / or the second NES state. Thus, as described herein, each NES state in a periodic sequence of NES states may generally be associated with a corresponding antenna configuration of the network node, but the same antenna configuration may be used in more than one NES state.

[0081] like Figure 6 As further shown in FIG. 6 , in a second operation 620, the UE may adjust the uplink antenna configuration to be used in the current time interval based on the active (or current) NES state. For example, based on a periodic NES state sequence configured by the network node, the UE may be able to determine the NES state of the network node when operating at various time intervals, and the UE may adjust the uplink antenna configuration in each time interval based on the NES state active in each time interval. For example, given Figure 6, the UE may determine the number of SRS resources, SRS configuration and / or SRS antenna ports associated with the first NES state. Then, during the duration that the first NES state is active, the UE may adjust the uplink antenna configuration based on the number of SRS resources, SRS configuration and / or SRS antenna ports associated with the first NES state. In addition, the UE may adopt a similar method to adjust the uplink antenna configuration during subsequent time periods associated with the flexible mode (e.g., depending on which NES state is dynamically indicated to be active during the time period associated with the flexible mode) and subsequent time periods when the second NES state is active. Therefore, in the third operation 630, the UE may perform one or more SRS transmissions to the network node during different time periods using the number of SRS resources, SRS configuration and / or SRS antenna ports associated with the corresponding NES states that are active during different time periods. In other words, the number of SRS resources, SRS configuration, and / or SRS antenna ports used by the UE to perform SRS transmission may change dynamically over time depending on a periodic NES state sequence that defines NES states that are active in different time intervals.

[0082] Thus, in some aspects, a UE may generally adjust one or more parameters related to how the UE sends an SRS, which a network node measures to estimate an uplink channel and receives uplink transmissions (e.g., PUSCH and / or physical uplink control channel (PUCCH) transmissions) from the UE. For example, as described herein, one or more parameters related to how the UE sends an SRS in a given time interval may be adjusted based on an antenna configuration associated with a NES state when the network node is operating during the time interval. For example, the UE may send UE capability information to the network node, which indicates an antenna switching capability represented as xTyR, indicating that the UE is capable of sending SRS on x antenna ports on a total of y antennas (e.g., an antenna switching capability of 4T8R means that the UE is capable of sending SRS on 4 antenna ports on a total of 8 antennas; other possible values ​​may include 4T4R and / or 2T2R, etc.).

[0083] Thus, in some aspects, each NES state associated with a given number of antenna ports may be mapped to an SRS antenna sounding configuration xTyR and to a set of SRS resources and / or a collection of SRS resources. Figure 6An example 640 mapping is depicted for NES states associated with an antenna configuration having 32 antenna ports and NES states associated with an antenna configuration having 16 antenna ports (note that other mappings are possible, such as for NES states associated with 8 antenna ports or another suitable number of antenna ports). As shown in example 640, UE capability information may indicate antenna switching capabilities including certain values ​​for x and y, which may be represented as (x, y), the NES state associated with 32 antenna ports may be mapped to the (x, y) indicated in the UE capability information, and the NES state associated with 16 antenna ports may be mapped to a reduced (x, y) value relative to the (x, y) value indicated in the UE capability information. For example, if the UE capability information indicates an antenna switching capability of 4T8R, the NES state associated with 32 antenna ports may be mapped to an SRS antenna detection configuration of 4T8R, and the NES state associated with 16 antenna ports may be mapped to an SRS antenna detection configuration of 2T4R, which is a reduced or downgraded configuration relative to the indicated 4T8R antenna switching capability.

[0084] In addition, each antenna port number may be associated with an SRS resource or a set of SRS resources. Figure 6 In some aspects, a NES state associated with 32 antenna ports is associated with a first set of SRS resources, and a NES state associated with 16 antenna ports is associated with a second set of SRS resources, where the second set of SRS resources may be a subset of the first set of SRS resources or a separate set of SRS resources. For example, in some aspects, a network node may define an SRS resource configuration based on one or more NES states associated with a maximum number of SRS antenna ports, and when the network node operates in the NES state associated with the maximum number of SRS antenna ports, the UE may use the SRS resource configuration during any time interval (e.g., a legacy, default, or normal mode when the network node uses the maximum number of antenna ports). Otherwise, when the network node switches to a different NES state associated with fewer antenna ports, the UE may be configured to silence one or more SRS resources in the SRS resource configuration to accommodate a reduced or degraded number of UE antenna ports for SRS sounding. Alternatively, in some aspects, each SRS resource or set of SRS resources may be mapped to one or more NES states, whereby the UE may send SRS in a given time interval using the SRS resource or set of SRS resources mapped to an active NES state.

[0085] Figure 7is a flow chart illustrating an example process 700, performed, for example, by a UE, to support joint antenna adaptation in accordance with the present disclosure. The example process 700 is an example in which a UE (eg, UE 120) performs operations associated with joint antenna adaptation in an energy efficient network.

[0086] like Figure 7 As shown in FIG. 7 , in some aspects, process 700 may include receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node (block 710). For example, a UE (such as by using Fig. 9 The communication manager 140 or receiving component 902 depicted in may receive information from a network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node, as described above.

[0087] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include receiving, during a current time period, one or more downlink transmissions from the network node using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states (block 720). For example, a UE (such as by using Fig. 9 The communication manager 140 or receiving component 902 depicted in the figure may receive one or more downlink transmissions from the network node during a current time period using the maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states, as described above.

[0088] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes described elsewhere herein.

[0089] In a first additional aspect, process 700 includes receiving information from a network node indicating a maximum number of MIMO layers for each NES state included in a periodic sequence of NES states in a corresponding NES configuration associated with the NES state, and identifying the maximum number of MIMO layers associated with an active NES state for a current time period based at least in part on the NES configuration associated with the active NES state for the current time period.

[0090] In a second additional aspect, alone or in combination with the first aspect, process 700 includes: receiving information from a network node indicating a mapping between a number of antenna ports and a value of a maximum number of MIMO layers; receiving information from the network node indicating a number of antenna ports for each NES state included in a periodic sequence of NES states; and identifying a maximum number of MIMO layers associated with an active NES state for a current time period based at least in part on the number of antenna ports associated with the active NES state for the current time period.

[0091] In a third additional aspect, alone or in combination with one or more of the first and second aspects, process 700 includes identifying a maximum number of MIMO layers to be used during the current time period from an NES configuration associated with the active NES state based at least in part on a periodic sequence of NES states configured for an active bandwidth portion associated with the current time period.

[0092] In a fourth additional aspect, alone or in combination with one or more of the first to third aspects, process 700 includes identifying, based at least in part on a periodic sequence of NES states configured for a cell, a maximum number of MIMO layers to be used during a current time period from a NES configuration associated with an active NES state.

[0093] In a fifth additional aspect, either alone or in combination with one or more of the first to fourth aspects, process 700 includes associating a normal mode with a current time period based at least in part on a periodic sequence of NES states, identifying a maximum number of MIMO layers to be used during the current time period from a bandwidth portion configuration for the current time period.

[0094] In a sixth additional aspect, alone or in combination with one or more of the first to fifth aspects, process 700 includes identifying a maximum number of MIMO layers to be used during the current time period from a bandwidth portion configuration for the current time period based at least in part on a periodic sequence of NES states not being configured for an active bandwidth portion associated with the current time period.

[0095] In a seventh additional aspect, either alone or in combination with one or more of the first to sixth aspects, process 700 includes associating a flexible mode with a current time period based at least in part on a periodic sequence of NES states, identifying a maximum number of MIMO layers to be used during the current time period from a bandwidth portion configuration of the current time period.

[0096] In an eighth additional aspect, either alone or in combination with one or more of the first to seventh aspects, process 700 includes associating a flexible mode with a current time period based at least in part on a periodic sequence of NES states, identifying a maximum number of MIMO layers to be used during the current time period from a cell configuration.

[0097] Although Figure 7 An example block diagram of process 700 is shown, but in some aspects, the same Figure 7 The process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. Additionally or alternatively, two or more of the blocks in the process 700 may be executed in parallel.

[0098] Figure 8 is a flow chart illustrating an example process 800, performed, for example, by a UE, to support joint antenna adaptation in accordance with the present disclosure. The example process 800 is an example in which a UE (eg, UE 120) performs operations associated with joint antenna adaptation in an energy efficient network.

[0099] like Figure 8 As shown in FIG. 8 , in some aspects, process 800 may include receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node (block 810). For example, a UE (such as by using Fig. 9 The communication manager 140 or receiving component 902 depicted in may receive information from a network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node, as described above.

[0100] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include sending one or more SRS transmissions to the network node during a current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states (block 830). For example, a UE (such as by using Fig. 9 The communication manager 140 or the sending component 904 depicted in the figure may send one or more SRS transmissions to the network node during the current time period using the SRS antenna detection configuration associated with the active NES state for the current time period, and the active NES state is identified at least in part based on the periodic sequence of NES states, as described above.

[0101] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes described elsewhere herein.

[0102] In a first additional aspect, process 800 includes sending UE capability information to a network node, the UE capability information indicating an SRS resource configuration for an NES state having a maximum number of SRS antenna ports, wherein an SRS antenna sounding configuration used in a current time period is based at least in part on the UE capability information.

[0103] In a second additional aspect, either alone or in combination with the first aspect, the SRS antenna sounding configuration used in the current time period is an SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being the NES state with the largest number of SRS antenna ports.

[0104] In a third additional aspect, either alone or in combination with one or more of the first and second aspects, the SRS antenna detection configuration used in the current time period silences one or more SRS resources relative to the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being an NES state associated with fewer SRS antenna ports than an NES state having a maximum number of SRS antenna ports.

[0105] In a fourth additional aspect, alone or in combination with one or more of the first to third aspects, an SRS antenna sounding configuration used in a current time period is mapped to a set of NES states including an active NES state for the current time period.

[0106] Although Figure 8 An example block diagram of process 800 is shown, but in some aspects, the same Figure 8 Process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in . Additionally or alternatively, two or more of the blocks in process 800 may be executed in parallel.

[0107] Fig. 9 is a diagram of an example apparatus 900 for wireless communication supporting joint antenna adaptation according to the present disclosure. The apparatus 900 may be a UE, or the UE may include the apparatus 900. In some aspects, the apparatus 900 includes a receiving component 902, a transmitting component 904, and a communication manager 140, which may communicate with each other (e.g., via one or more buses). As shown, the apparatus 900 may communicate with another apparatus 906 (such as a UE, a network node, or another wireless communication device) using the receiving component 902 and the transmitting component 904.

[0108] In some aspects, the apparatus 900 may be configured to perform the Figures 5 and 6 Additionally or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as Figure 7 Course 700 and / or Figure 8 In some aspects, the apparatus 900 may include the above-mentioned process 800. Figure 2 One or more components of the UE.

[0109] The receiving component 902 may receive communications, such as reference signals, control information, and / or data communications, from the device 906. The receiving component 902 may provide the received communications to one or more other components of the device 900, such as the communications manager 140. In some aspects, the receiving component 902 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components. In some aspects, the receiving component 902 may include the above in combination with Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors and / or memories of the UE.

[0110] The transmission component 904 may transmit communications, such as reference signals, control information, and / or data communications, to the device 906. In some aspects, the communication manager 140 may generate communications and may transmit the generated communications to the transmission component 904 for transmission to the device 906. In some aspects, the transmission component 904 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 906. In some aspects, the transmission component 904 may include the above in combination with Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, and / or memories of the UE. In some aspects, the transmit component 904 can be co-located with the receive component 902 in a transceiver.

[0111] The communication manager 140 may receive or cause the receiving component 902 to receive information from the network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The communication manager 140 may receive or cause the receiving component 902 to receive one or more downlink transmissions from the network node using a maximum number of MIMO layers associated with an active NES state for the current time period during the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states. In some aspects, the communication manager 140 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 140.

[0112] The communication manager 140 may receive or cause the receiving component 902 to receive information from the network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The communication manager 140 may transmit or cause the transmitting component 904 to transmit one or more SRS transmissions to the network node using an SRS antenna detection configuration associated with an active NES state for the current time period during the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states. In some aspects, the communication manager 140 may perform one or more operations described elsewhere herein as being performed by one or more components of the communication manager 140.

[0113] The communication manager 140 may include the above combined Figure 2 Controller / processor and / or memory of the UE described. In some aspects, the communication manager 140 includes a component set such as identification component 908. Alternatively, the component set may be separate and distinct from the communication manager 140. In some aspects, one or more components in the component set may include the above-mentioned combination Figure 2 The controller / processor and / or memory of the UE described herein may be implemented in or within the controller / processor and / or memory. Additionally or alternatively, one or more components in the component set may be at least partially implemented as software stored in the memory. For example, a component (or a portion of a component) may be implemented as an instruction or code stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0114] The receiving component 902 can receive information from a network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The receiving component 902 can receive one or more downlink transmissions from the network node during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

[0115] Receiving component 902 can receive information from a network node indicating a maximum number of MIMO layers for each NES state included in the periodic sequence of NES states in a respective NES configuration associated with the respective NES state. Identifying component 908 can identify the maximum number of MIMO layers associated with the active NES state for the current time period based at least in part on the NES configuration associated with the active NES state for the current time period.

[0116] The receiving component 902 can receive information from a network node indicating a mapping between a number of antenna ports and a value for a maximum number of MIMO layers. The receiving component 902 can receive information from a network node indicating a number of antenna ports for each NES state included in a periodic sequence of NES states. The identifying component 908 can identify a maximum number of MIMO layers associated with an active NES state for a current time period based at least in part on the number of antenna ports associated with the active NES state for the current time period.

[0117] Identification component 908 can identify a maximum number of MIMO layers to use during the current time period from a NES configuration associated with the active NES state based at least in part on the periodic sequence of NES states being configured for the active bandwidth portion associated with the current time period.

[0118] Identification component 908 can identify a maximum number of MIMO layers to use during a current time period from a NES configuration associated with an active NES state based at least in part on the periodic sequence of NES states configured for the cell.

[0119] Identification component 908 can associate the normal mode with the current time period based at least in part on the periodic sequence of NES states, identify a maximum number of MIMO layers to use during the current time period from a bandwidth portion configuration for the current time period.

[0120] Identification component 908 can identify a maximum number of MIMO layers to use during the current time period from a bandwidth portion configuration for the current time period based at least in part on the periodic sequence of NES states not being configured for an active bandwidth portion associated with the current time period.

[0121] Identification component 908 can associate a flexible mode with a current time period based at least in part on the periodic sequence of NES states, identifying a maximum number of MIMO layers to use during the current time period from a bandwidth portion configuration for the current time period.

[0122] Identification component 908 can associate a flexible mode with a current time period based at least in part on the periodic sequence of NES states, identifying a maximum number of MIMO layers to be used during the current time period from the cell configuration.

[0123] The receiving component 902 can receive information from a network node indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node. The transmitting component 904 can transmit one or more SRS transmissions to the network node during a current time period using an SRS antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

[0124] Transmitting component 904 can transmit UE capability information indicating an SRS resource configuration for an NES state having a maximum number of SRS antenna ports to a network node, wherein the SRS antenna sounding configuration used in a current time period is based at least in part on the UE capability information.

[0125] Fig. 9 The number and arrangement of components shown in FIG. are provided as examples. In practice, Fig. 9 There may be additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig. 9 Two or more components shown in may be implemented in a single component, or Fig. 9 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Fig. 9 The assembly of (one or more) components shown in the executable is described as being composed of Fig. 9 One or more functions performed by another set of components shown in .

[0126] The following provides an overview of some aspects of the disclosure:

[0127] Aspect 1: A method of wireless communication performed by a UE, the method comprising: receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; and receiving one or more downlink transmissions from the network node during a current time period using a maximum number of MIMO layers associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0128] Aspect 2: The method according to Aspect 1 further includes: receiving information from the network node, the information indicating the maximum number of MIMO layers for the corresponding NES state in the corresponding NES configuration associated with each NES state included in the periodic sequence of NES states; and identifying the maximum number of MIMO layers associated with the active NES state for the current time period based at least in part on the NES configuration associated with the active NES state for the current time period.

[0129] Aspect 3: The method according to Aspect 1 further includes: receiving information from the network node, the information indicating a mapping between the number of antenna ports and the value of the maximum number of MIMO layers; receiving information from the network node, the information indicating the number of antenna ports for each NES state included in the periodic sequence of NES states; and identifying the maximum number of MIMO layers associated with the active NES state for the current time period based at least in part on the number of antenna ports associated with the active NES state for the current time period.

[0130] Aspect 4: The method according to any one of Aspects 1 to 3 further includes: at least partially based on the periodic sequence of NES states being configured for the active bandwidth portion associated with the current time period, identifying the maximum number of MIMO layers to be used during the current time period from the NES configuration associated with the active NES state.

[0131] Aspect 5: The method according to any one of Aspects 1 to 3 further includes: the periodic sequence of NES states is configured for a cell at least in part based on the NES state, and the maximum number of MIMO layers to be used during the current time period is identified from the NES configuration associated with the active NES state.

[0132] Aspect 6: The method according to any one of Aspects 1 to 3 further includes: associating a normal mode with the current time period based at least in part on the periodic sequence of NES states, and identifying the maximum number of MIMO layers to be used during the current time period from the bandwidth portion configuration used for the current time period.

[0133] Aspect 7: The method according to any one of Aspects 1 to 3 further includes: identifying the maximum number of MIMO layers to be used during the current time period from the bandwidth portion configuration used for the current time period, at least in part based on the periodic sequence of NES states not being configured for the active bandwidth portion associated with the current time period.

[0134] Aspect 8: The method according to any one of Aspects 1 to 3 further includes: associating a flexible mode with the current time period based at least in part on the periodic sequence of NES states, and identifying the maximum number of MIMO layers to be used during the current time period from the bandwidth portion configuration used for the current time period.

[0135] Aspect 9: The method according to any one of Aspects 1 to 3 further includes: associating a flexible mode with the current time period based at least in part on the periodic sequence of NES states, and identifying the maximum number of MIMO layers to be used during the current time period from the cell configuration.

[0136] Aspect 10: A method of wireless communication performed by a user equipment (UE), the method comprising: receiving information from a network node, the information indicating a periodic sequence of NES states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; and sending one or more SRS transmissions to the network node during a current time period using an SRS antenna detection configuration associated with an active NES state for the current time period, the active NES state being identified at least in part based on the periodic sequence of NES states.

[0137] Aspect 11: The method according to Aspect 10 further includes: sending UE capability information to the network node, the UE capability information indicating an SRS resource configuration for an NES state with a maximum number of SRS antenna ports, wherein the SRS antenna detection configuration used in the current time period is at least partially based on the UE capability information.

[0138] Aspect 12: A method according to Aspect 11, wherein the SRS antenna detection configuration used in the current time period is the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being the NES state with the maximum number of SRS antenna ports.

[0139] Aspect 13: A method according to any one of Aspects 11 to 12, wherein the SRS antenna detection configuration used in the current time period silences one or more SRS resources relative to the SRS resource configuration indicated in the UE capability information at least in part based on the active NES state used for the current time period being an NES state associated with fewer SRS antenna ports than the NES state having the maximum number of SRS antenna ports.

[0140] Aspect 14: The method according to any one of aspects 10 to 11, wherein the SRS antenna sounding configuration used in the current time period is mapped to a set of NES states including the active NES state for the current time period.

[0141] Aspect 15: An apparatus for performing wireless communications at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 1 to 14.

[0142] Aspect 16: A device for wireless communication, the device comprising: a memory; and one or more processors, the one or more processors coupled to the memory, the one or more processors configured to execute the method according to one or more of aspects 1 to 14.

[0143] Aspect 17: An apparatus for wireless communication, the apparatus comprising at least one component configured to perform the method according to one or more of aspects 1 to 14.

[0144] Aspect 18: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 14.

[0145] Aspect 19: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 14.

[0146] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0147] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware or hardware and software. "Software" should be broadly interpreted as meaning an instruction, an instruction set, a code, a code segment, a program code, a program, a subroutine, a software module, an application, a software application, a software package, a routine, a subroutine, an object, an executable program, a thread of execution, a procedure, or a function, etc., whether it is described in software, firmware, middleware, microcode, hardware description language or other terms. As used herein, a "processor" is implemented with a combination of hardware or hardware and software. It will be obvious that the system or method described herein can be implemented in different forms of hardware or a combination of hardware and software. The actual dedicated control hardware or software code for implementing these systems or methods does not limit various aspects. Therefore, the operation and behavior of these systems or methods are described herein without reference to specific software codes, because those skilled in the art will understand that software and hardware can be designed to implement these systems or methods at least in part based on the description herein.

[0148] As used herein, "satisfying a threshold" may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0149] Although the specific combination of features is stated in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner not specifically described in the claims or not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). As an example, "at least one of the following: a, b or c" is intended to cover a, b, c, a+b, a+c, b+c and a+b+c, and any combination with multiple identical elements (for example, a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c and c+c+c, or any other ordering of a, b and c).

[0150] Any element, action or instruction used herein should not be interpreted as key or necessary unless explicitly described as such. In addition, as used herein, the article "one" is intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more items connected to the article "said", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items, and can be used interchangeably with "one or more". If you only want to refer to an item, the phrase "only one" or similar terms will be used. Moreover, as used herein, the terms "having", "containing", "including" and similar terms are intended to be open terms, which do not limit the elements they modify (for example, the element "including" A can also contain B). In addition, the phrase "based on" is intended to mean "based at least in part", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used consecutively is intended to be inclusive and used interchangeably with "and / or" unless explicitly stated otherwise (e.g., if used in conjunction with "either" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: at least one memory; and at least one processor, the at least one processor being communicatively coupled to the at least one memory, the at least one processor being configured to cause the UE to: receiving information from a network node, the information indicating a periodic sequence of network energy saving (NES) states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; as well as One or more downlink transmissions are received from the network node during a current time period using a maximum number of multiple-input multiple-output (MIMO) layers associated with an active NES state for the current time period, the active NES state identified based at least in part on the periodic sequence of NES states.

2. The UE according to claim 1, wherein the at least one processor is further configured to cause the UE to: receiving from the network node information indicating, in a respective NES configuration associated with each NES state included in the periodic sequence of NES states, the maximum number of MIMO layers for the respective NES state; and The maximum number of MIMO layers associated with the active NES state for the current time period is identified based at least in part on the NES configuration associated with the active NES state for the current time period.

3. The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to: receiving information from the network node, the information indicating a mapping between a number of antenna ports and a value of a maximum number of MIMO layers; receiving information from the network node, the information indicating a number of antenna ports for each NES state included in the periodic sequence of NES states; as well as The maximum number of MIMO layers associated with the active NES state for the current time period is identified based at least in part on the number of antenna ports associated with the active NES state for the current time period.

4. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: Based at least in part on the periodic sequence of NES states being configured for an active bandwidth portion associated with the current time period, identifying the maximum number of MIMO layers to be used during the current time period from an NES configuration associated with the active NES state.

5. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: Based at least in part on the periodic sequence of NES states configured for a cell, the maximum number of MIMO layers to be used during the current time period is identified from a NES configuration associated with the active NES state.

6. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: A normal mode is associated with the current time period based at least in part on the periodic sequence of NES states, and the maximum number of MIMO layers to be used during the current time period is identified from a bandwidth portion configuration for the current time period.

7. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: Based at least in part on the periodic sequence of NES states not being configured for an active bandwidth portion associated with the current time period, identifying the maximum number of MIMO layers to be used during the current time period from a bandwidth portion configuration for the current time period.

8. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: A flexible mode is associated with the current time period based at least in part on the periodic sequence of NES states, and the maximum number of MIMO layers to be used during the current time period is identified from a bandwidth portion configuration for the current time period.

9. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: A flexible mode is associated with the current time period based at least in part on the periodic sequence of NES states, the maximum number of MIMO layers to be used during the current time period being identified from a cell configuration.

10. A UE for wireless communication, the UE comprising: at least one memory; and at least one processor, the at least one processor being communicatively coupled to the at least one memory, the at least one processor being configured to cause the UE to: receiving information from a network node, the information indicating a periodic sequence of network energy saving (NES) states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; as well as One or more sounding reference signal (SRS) transmissions are sent to the network node during a current time period using a sounding reference signal (SRS) antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

11. The UE of claim 10, wherein the at least one processor is further configured to cause the UE to: UE capability information is sent to the network node, the UE capability information indicating an SRS resource configuration for a NES state having a maximum number of SRS antenna ports, wherein the SRS antenna sounding configuration used in the current time period is based at least in part on the UE capability information.

12. The UE of claim 11, wherein the SRS antenna sounding configuration used in the current time period is the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being the NES state with the maximum number of SRS antenna ports.

13. A UE according to claim 11, wherein the SRS antenna detection configuration used in the current time period silences one or more SRS resources relative to the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being an NES state associated with fewer SRS antenna ports than the NES state having the maximum number of SRS antenna ports. 14 . The UE of claim 10 , wherein the SRS antenna sounding configuration used in the current time period is mapped to a set of NES states including the active NES state for the current time period.

15. A method of wireless communication performed by a user equipment (UE), the method comprising: receiving information from a network node, the information indicating a periodic sequence of network energy saving (NES) states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; as well as One or more downlink transmissions are received from the network node during a current time period using a maximum number of multiple-input multiple-output (MIMO) layers associated with an active NES state for the current time period, the active NES state identified based at least in part on the periodic sequence of NES states.

16. The method according to claim 15, further comprising: receiving, from the network node, information indicating, in a respective NES configuration associated with each NES state included in the periodic sequence of NES states, the maximum number of MIMO layers for the respective NES state; as well as The maximum number of MIMO layers associated with the active NES state for the current time period is identified based at least in part on the NES configuration associated with the active NES state for the current time period.

17. The method according to claim 15, further comprising: receiving information from the network node, the information indicating a mapping between a number of antenna ports and a value of a maximum number of MIMO layers; receiving information from the network node, the information indicating a number of antenna ports for each NES state included in the periodic sequence of NES states; as well as The maximum number of MIMO layers associated with the active NES state for the current time period is identified based at least in part on the number of antenna ports associated with the active NES state for the current time period.

18. The method according to claim 15, further comprising: Based at least in part on the periodic sequence of NES states being configured for an active bandwidth portion associated with the current time period, identifying the maximum number of MIMO layers to be used during the current time period from an NES configuration associated with the active NES state.

19. The method according to claim 15, further comprising: Based at least in part on the periodic sequence of NES states configured for a cell, the maximum number of MIMO layers to be used during the current time period is identified from a NES configuration associated with the active NES state.

20. The method according to claim 15, further comprising: A normal mode is associated with the current time period based at least in part on the periodic sequence of NES states, and the maximum number of MIMO layers to be used during the current time period is identified from a bandwidth portion configuration for the current time period.

21. The method according to claim 15, further comprising: Based at least in part on the periodic sequence of NES states not being configured for an active bandwidth portion associated with the current time period, identifying the maximum number of MIMO layers to be used during the current time period from a bandwidth portion configuration for the current time period.

22. The method according to claim 15, further comprising: A flexible mode is associated with the current time period based at least in part on the periodic sequence of NES states, and the maximum number of MIMO layers to be used during the current time period is identified from a bandwidth portion configuration for the current time period.

23. The method according to claim 15, further comprising: A flexible mode is associated with the current time period based at least in part on the periodic sequence of NES states, the maximum number of MIMO layers to be used during the current time period being identified from a cell configuration.

24. A method of wireless communication performed by a user equipment (UE), the method comprising: receiving information from a network node, the information indicating a periodic sequence of network energy saving (NES) states, each NES state in the periodic sequence of NES states being associated with an antenna configuration of the network node; as well as One or more sounding reference signal (SRS) transmissions are sent to the network node during a current time period using a sounding reference signal (SRS) antenna sounding configuration associated with an active NES state for the current time period, the active NES state being identified based at least in part on the periodic sequence of NES states.

25. The method according to claim 24, further comprising: UE capability information is sent to the network node, the UE capability information indicating an SRS resource configuration for a NES state having a maximum number of SRS antenna ports, wherein the SRS antenna sounding configuration used in the current time period is based at least in part on the UE capability information.

26. The method of claim 25, wherein the SRS antenna sounding configuration used in the current time period is the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being the NES state with the maximum number of SRS antenna ports.

27. A method according to claim 25, wherein the SRS antenna detection configuration used in the current time period silences one or more SRS resources relative to the SRS resource configuration indicated in the UE capability information based at least in part on the active NES state for the current time period being an NES state associated with fewer SRS antenna ports than the NES state having the maximum number of SRS antenna ports.

28. The method of claim 24, wherein the SRS antenna sounding configuration used in the current time period is mapped to a set of NES states including the active NES state for the current time period.

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