Method and system for slice allocation for load shedding to minimize power consumption when gNB is controlled for slice allocation

Abstract

A system and method for adaptive bandwidth (BW) management is provided by: a control unit of a distribution and aggregation unit for monitoring power and traffic loads at a plurality of nodes in a network; and a BW management unit communicating with the control unit to reallocate a set of network slices to a set of smaller bandwidth portions (BWPs), the BW management unit being configured to define smaller BWPs from a slice mapping for slice reallocation during an AC power outage, the slice mapping including network slices associated with the smaller BWPs in the network; and the BW management unit being configured to adapt the BW to users of the node by reallocating at least one network slice at the node to the defined smaller BWP in response to at least one of conditions determined by the BW management unit: an AC power outage and a reduction in traffic load at the node.

Description

[Technical Field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority to related, co-pending U.S. patent application Ser. No. 16 / 891,934, filed June 3, 2020, and to related, co-pending U.S. patent application Ser. No. 16 / 891,991, filed June 3, 2020, all of which are incorporated herein by reference in their entireties.

[0002] [Technical field] The following discussion relates generally to power management in wireless communication systems. More specifically, the following discussion relates to systems, devices, and automated processes that reduce power drawn by radio frequency (RF) radios based on utility power interruptions or failures, such as in 5G data networks, through smart bandwidth adaptation and traffic loading that increases the operating time of switched backup uninterruptible power supplies (UPS). [Background technology]

[0003] 5G data standards and telephone networks are being developed to provide significantly improved bandwidth and quality of service to mobile phones, computers, and Internet of Things (IoT) devices. However, high-bandwidth 5G networks face additional challenges that are now being recognized. In part, due to the high bandwidth, 5G base stations are expected to consume approximately three times the power of conventional 4G base stations during use. Furthermore, many more 5G base stations will be required to cover the same area as conventional 4G base stations. Therefore, not only will each 5G base station consume three times the power of a 4G base station, but many more 5G base stations will be used to cover the same area, resulting in a significant increase in power consumption.

[0004] Furthermore, with the increased power usage, in the event of an AC power outage, 5G base stations will need to be equipped with battery backups to ensure service during the AC power outage. These battery backup units are expensive, and the cost of the battery backup is determined in part by the amount of power required and subsequently consumed by the 5G base station's RF radio transmitters and receivers, which in this case exceeds that of conventional 4G base stations in both number of uses and power required for each 5G base station. In these cases where large amounts of power are required and consumed by a 5G base station, multiple series- or parallel-connected backup power packs are required, which results in a several-fold increase in the cost of the final configured 5G base station per cell site.

[0005] Therefore, it is desirable to provide a solution for smartly changing the operating bandwidth (BW) (i.e., high bandwidth) at a cell site to manage power consumption without causing service interruptions at any cell site, particularly in the case of an AC power outage or interruption to improve the power management efficiency of each cell site, thereby reducing the power requirements of all active carriers at cell sites in the network.

[0006] It is therefore desirable to create systems, devices, and automated processes that can monitor utility power interruptions and failures and enable various configurations of base station components to operate in a desired cell network. It is also desirable to improve connectivity and operating time for base station equipment operating in a backup power mode using backup batteries at cell sites in 5G or similar networks.

[0007] Furthermore, other desirable features and characteristics of the present invention will become apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings and the foregoing technical field and background. [Brief explanation of the drawings]

[0008] Exemplary embodiments are described below with reference to the following drawings, in which like numerals refer to like elements and in which:

[0009] [Figure 1] 1 illustrates an exemplary diagram of components within a base station of a base station power management system in a wireless data networking environment in accordance with various embodiments. [Figure 2] 1 illustrates an example diagram of a feedback communication loop for power management of a base station in response to a utility power interruption or failure of a base station power management system in a wireless data networking environment according to various embodiments. [Figure 3] 1 illustrates an exemplary flow chart for power management of a base station in response to a utility power interruption or failure in a base station power management system according to various embodiments. [Figure 4] 1 illustrates a flowchart of an exemplary automated selection process for reducing slice access failures in accordance with various embodiments. [Figure 5] 1 illustrates a flow diagram of an exemplary slice configuration before and after an AC power outage in accordance with various embodiments. [Figure 6] 10 illustrates an exemplary flowchart for reassigning users to smaller BWPs in response to an AC power outage, power interruption, or network loading in accordance with various embodiments. [Figure 7] 1 illustrates an example flow chart of network slicing in response to or associated with an AC power outage, a power interruption, or a light network load condition, according to various embodiments. [Figure 8] 1 illustrates diagrams of example user equipment (UE) and network architectures, eg, automated processes, for reducing power consumption in accordance with various embodiments. Summary of the Invention

[0010] Systems, devices, and automated processes are provided for providing an adaptive bandwidth solution for reducing power consumption of backup power supplies to cell sites (or nodes) in a network in response to a power loss or light network load at the cell site.

[0011] In an exemplary embodiment, a system for associating network slicing with adaptive bandwidth (BW) management is provided. The system includes: an element management control unit including a distribution and aggregation unit (DU / CU) for monitoring power and traffic load at a plurality of nodes in a network; a BW management unit communicating with the DU / CU to reallocate a set of network slices to a set of smaller bandwidth portions (BWPs) at the node; the BW management unit configured to define a smaller BWP from a set of smaller BWPs from a slice mapping for slice reallocation during an AC power outage, the slice mapping including a set of network slices associated with the set of smaller BWPs in the network; and the BW management unit configured to adapt a BW to a user of the node by reallocating at least one network slice at the node to the defined smaller BWP in response to at least one of a condition determined by the BW management unit, the condition being an AC power outage and a decrease in traffic load at the node.

[0012] In various exemplary embodiments, the system further includes a DU / CU for, in response to at least one of the determined conditions of an AC power loss and a traffic load reduction, transmitting data about the determined condition to a BW management unit to terminate provision of one or more network slices. The system includes a BW management unit configured to automatically initiate a network slice reallocation process at the node in response to data about the power loss and traffic load reduction received from a DU / CU monitoring a node of the network, wherein use of a set of smaller BWPs does not require a carrier change at the node. The system includes a BW management unit configured to block transmission of associated subcarriers of the network at the node to reduce power consumption. The BW management unit is configured to communicate with a radio receiver of the node to exchange messages about requirements of elements of the node based on operation of using a smaller BWP at the node to reduce output power of the radio receiver of the node by taking into account data received by the DU / CU indicating merging of the network slice to the smaller BWP at the node. The system includes a gNB node controlled by a radio network having a DU / CU configured to monitor AC power outages and activate a network slice reallocation process in the gNB node. The DU / CU is configured to send data about the condition to a BW management unit to terminate provision of one or more network slices while enabling provision of higher priority network slices. The system includes a radio controller of the node, instructed by the BW management unit, that monitors users in designated lower BWPs by user traffic data received from the DU / CU to control routing of power from a backup battery and to reduce power consumed by the node via a battery controller for reducing power consumption by the backup battery.

[0013] In yet another exemplary embodiment, a method for adaptive bandwidth (BW) management is provided. The method includes configuring an element management control unit including a distribution and aggregation unit (DU / CU) for monitoring power and traffic load at a plurality of nodes in a network, communicating with the DU / CU by the BW management unit to reallocate a set of network slices to a set of smaller bandwidth portions (BWPs) at the node, configuring the BW management unit to define smaller BWPs from the set of smaller BWPs from a slice mapping for slice reallocation during an AC power outage, the slice mapping including a set of network slices associated with the set of smaller BWPs in the network, and adapting a BW by the BW management unit to a user of the node by reallocating at least one network slice at the node to the defined smaller BWP in response to at least one condition determined by the BW management unit: an AC power outage and a reduction in traffic load at the node.

[0014] In various exemplary embodiments, the method includes, in response to at least one of a determined condition of an AC power loss and a traffic load reduction, transmitting data about the condition by the DU / CU to a BW management unit to terminate provision of one or more network slices. The method further includes, in response to the data about the power loss and traffic load reduction received from a DU / CU monitoring the node of the network, automatically initiating a network slice reallocation process at the node by the BW management unit, wherein use of a smaller set of BWPs does not require a carrier change at the node. The method includes, by the BW management unit, shutting off transmission of associated subcarriers of the network at the node to reduce power consumption. A further method includes, by the BW management unit, communicating with a radio receiver of the node to exchange messages about operating elements at the node using the smaller BWPs at the node to reduce output power of the radio receiver of the node in consideration of the data received by the DU / CU indicating a network slice reallocation at the node. The method further includes controlling access by users of the gNB node via a wireless network by data from the DU / CU monitoring the AC power loss and activating the network slice reallocation process at the gNB node. The system further includes transmitting data about the condition from the DU / CU to a BW management unit to terminate the provision of one or more network slices while enabling the provision of higher priority network slices. The method includes instructing, by the BW management unit monitoring users reallocated by the provision of network slices at the node, via a radio controller of the node to route power from a backup battery to reduce energy consumed by the node via a battery controller and to reduce power drawn by the backup battery.

[0015] In yet another embodiment, a computer program product tangibly embodied in a computer-readable storage device storing a set of instructions that, when executed by a processor, implements a method for a base station operation mode when a power loss or light network load is detected. The method includes configuring an element management control unit including a distribution and aggregation unit (DU / CU) for monitoring power and traffic load at a plurality of nodes in a network, communicating with the DU / CU by a BW management unit to reallocate a set of network slices at the node to a set of smaller Bandwidth Portions (BWPs), configuring the BW management unit to define a smaller BWP from the set of smaller BWPs from a slice mapping for slice reallocation during an AC power outage, the slice mapping including a set of network slices associated with the set of smaller BWPs in the network, and adapting a BW by the BW management unit to a user of the node by reallocating at least one network slice at the node to the defined smaller BWP in response to at least one of conditions determined by the BW management unit: an AC power outage and a reduced traffic load at the node.

[0016] In various exemplary embodiments, the method includes automatically initiating, by a BW management unit, a slice reallocation process at the node in response to data about a power loss and a traffic load reduction received from a DU / CU monitoring the node of the network, where the use of a smaller set of BWPs does not require a carrier change at the node. The method further includes communicating with a radio receiver of the node by the BW management unit to exchange messages about operating elements at the node using the smaller BWPs at the node to reduce the output power of the radio receiver of the node by taking into account the data received by the DU / CU indicating network slice reallocation at the node. The method further includes transmitting data about conditions from the DU / CU to the BW management unit to terminate provision of one or more network slices while enabling provision of a higher priority network slice. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following detailed description is intended to provide some examples that will illustrate the broader concepts described herein, but is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description.

[0018] When connecting 5G base stations to the power grid, power may not always be continuously available and provided to 5G base stations due to numerous environmental and operational reasons, such as accidents, lightning strikes, and planned outages. Therefore, to ensure robust and reliable 5G services from 5G base stations, carriers must build backup power systems. In 5G networks, providing backup power to macrocells is standard, and in many cases, sufficient service is provided at the macro level. However, power-hungry small cell structures require additional power backup that is not typically available in traditional 4G cell tower power deployments. Therefore, additional backup power is essential for the proper functioning of small cell rollouts.

[0019] In 5G networks, RF radio units are required to have battery backups to ensure service during AC power outages. Battery backup units are expensive, and the cost for each battery backup is calculated based on the power consumed by the radio unit, the backup duration, and the number of active carriers in the base station or network.

[0020] Currently, there are many obstacles or drawbacks that prevent the optimization of battery backup capacity in the event of a power interruption or power outage. It would be desirable to be able to optimize the required battery backup capacity as follows:

[0021] (1) Shutting down the active carrier: This is not a recommended option as it will impact user experience, lack of emergency calls such as E911, and will result in users canceling their service and switching to an operator with battery backup service. (2) Reducing the active carrier's bandwidth: Changing the active carrier bandwidth will require a new cell configuration for a lower channel bandwidth on the same radio, which is not easily achieved with current operations. (3) Changing the active bandwidth will require the site to reboot to activate the new channel bandwidth, which will also cause a service interruption.

[0022] The advanced capabilities of 5G small cells mean additional power requirements. Increased data traffic demands more computing power. Massive MIMO can help improve spectral efficiency, but power efficiency is generally low; a typical three-sector small cell can require 200 to 1,000 watts of power.

[0023] They need to be powered by large numbers of small cells in a cost-effective and repeatable manner that supports rapid and efficient deployment. The first step involves recognizing that the traditional model for powering macrocell sites does not apply to small cells.

[0024] The RF radio and antenna use a fixed input power based on full-load RF conditions. If utility power is interrupted, lost, or significantly reduced, the RF radio cannot receive notification to adjust its power consumption accordingly. In other words, the RF radio is not notified, and is not configured to be notified of utility power loss, and cannot change or withdraw its preset input power requirements. The inability to change the input power requirements of the RF radio degrades its operational performance by prematurely depleting its battery backup system.

[0025] 5G New Radio (NR) is a global standard for a unified, capable 5G air interface that may provide a faster broadband experience. It is designed with an initial bandwidth portion (BWP) used by all UEs during initial access and a dedicated BWP for a UE or group of UEs that may apply data allocation. BWP adaptation is controlled by the gNB node (Radio Access Network (RAN) + Distributed Unit (DU) / Centralized Unit (CU) for 5G). There may be multiple smaller BWPs (i.e., RAN slicing architectures with multiple sets of functional division and placement in one cell) that may be predefined by the operator to be used during AC power outages. In an exemplary embodiment, another option is to use a gradual reduction of the BWP during operation (e.g., starting with only a 25% reduction in BW, then moving to gradually lower values ​​if power is not restored). Using this process, a degradation of the user experience may be avoided in the case of a short AC power outage. Network slicing can also be linked to BWPs, minimizing power consumption of gNBs by controlling the interaction of slices and BWPs during AC power outages or light network load operations. For example, an operator may choose to merge all available slices into a smaller BWP. An operator may choose to define a mapping between BWPs and slices during AC power outages when multiple BWPs are defined that are available during AC power outages.

[0026] Radio Access Network (RAN) virtualization in next-generation (5G) wireless systems enables the physical decoupling of applications and services from devices and network infrastructure. This allows for the dynamic deployment of different services by different network operators across the same physical infrastructure. RAN slicing, leveraging virtualization, allows operators to offer dedicated logical networks with customer-specific features without losing the economies of scale of a shared infrastructure. When these virtual networks are implemented, mobile devices and other user equipment can face challenges connecting and operating properly in an environment where each network offers different "slices" of bandwidth for varying quality of service (QoS).

[0027] In reconfigurations for 5G base stations, 4G two-port transceivers are replaced with four-port radios, enabling the use of multiple-input, multiple-output (MIMO) transmission to improve spectral efficiency. MIMO boosts signal strength and helps reduce interference. Eight-port radios take beamforming a step further to provide further efficiency gains. Early 5G technology will take full advantage of beamforming by using 16 or 64 transmit / receive chains (16T / 16R, 64T / 64R) and radio-integrated antennas operating at 2.3 GHz or higher.

[0028] Power amplifier efficiency has improved significantly, primarily due to more sophisticated linearization techniques and higher output power capabilities. However, next-generation "massive MIMO" active antenna unit (AAU) radios will require a large number of low-power amplifiers per AAU radio. Linearizing each small amplifier is costly, marginally effective, and therefore not a viable solution, as the additional circuitry itself consumes much of the power that could be saved. In this case, the potential for power efficiency degradation may be very high.

[0029] It is desirable to achieve cost savings using intelligent solutions to reduce the power consumption of 5G base stations when operating in backup power mode, while still meeting sufficient regulatory operating requirements to prevent radio transmitter shutdown.

[0030] To save component costs and increase current usage and efficiency, it is desirable to limit the number of backup power sources required for use when operating a 5G base station in backup power mode.

[0031] It is desirable to provide a system and method for operational management of base station components that enables smart management of power consumption by implementing adaptive bandwidth control and slicing provisioning at cell sites (i.e., nodes), or by allowing an automated system to reconfigure components based on an examination of the antenna's current traffic load to change the RF radio transmitter's operational mode based on an assessment of whether degraded RF radio service can be implemented under current conditions. Where possible, the RF EMS or orchestration system would execute workflows to lower the input power requirements of the RF radio. This could reduce current power consumption, which could result in an increase in the amount of time the RF radio / antenna can operate in backup UPS power mode and provide service.

[0032] It is desirable to implement a process whereby an operator can choose to terminate the provision of some slices and continue only higher-priority slices. Detection of a wireless AC power outage by the DU / CU, DU / CU, or NFMF can also detect the AC power outage via the FCAP and activate the solution. During an AC power outage, the RAN will notify the control unit (DU: distribution unit or CU: aggregation unit). The DU / CU will begin moving all user traffic to a designated lower BWP (e.g., initial BWP) while shutting down all other BWPs in the currently operating carrier. Based on the configuration, the DU / CU will move all users and / or slices to a smaller BWP during an AC power outage or light network load to minimize gNB power consumption and will notify users of the change in assigned BWP. Users will stop monitoring their current BWP and immediately begin tracking only the lower BWP.

[0033] In multi-carrier operation, the DU / CU may also move all traffic to a single carrier based on BWP or slice prioritization. After full power restoration or increased RAN load, the gNB may reactivate all dedicated BWPs or slices and seamlessly move users to their individual BWPs or slices. Multi-user MIMO (MU-MIMO) operation reduces bandwidth allocation to UEs. When the RAN scheduler operates in MU-MIMO operation and determines that all serving users can be assigned to the same lower-order PRB, the DU / CU may turn off transmissions on other subcarriers, thereby saving power. Lower-order PRB allocations for MU-MIMO may be prioritized based on predefined priorities of BWPs and / or slicing.

[0034] To reduce power consumption of an operating RF radio, it is desirable to change the input power setting of the RF radio to a required level in response to a feedback message by the RF radio of a change or interruption in the input utility power level detected. The operating power setting of the RF radio is reduced based on immediate operating requirements, including a determination of RF service available at the antenna / radio, to provide extended operating time for antenna reception and communication time with the RF radio transmitter.

[0035] It is desirable for an automated system to be able to reconfigure components based on an examination of the antenna's current traffic load to change the RF radio transmitter's operating mode based on an assessment of whether a degraded RF radio service can be implemented under current conditions. If possible, the RF EMS or orchestration system would execute a workflow to lower the input power requirements of the RF radio. This could reduce current power consumption, which could result in an increase in the amount of time the RF radio / antenna can operate in backup UPS power mode and provide service.

[0036] It is desirable to provide a system and method whereby when the RF radio of an operating cell (i.e., a gNB node) experiences a degradation or interruption of the mains power at the input to the base station, the operational system is modified to compensate for the loss of the mains power, thereby reducing the current consumption of the RF radio.

[0037] Wireless mobile communication technologies use various standards and protocols to transmit data between base transceiver stations (BTSs) and wireless mobile devices. The deployment of numerous small cells presents a need for energy-efficient power management solutions in fifth-generation (5G) cellular networks. While massive multiple-input multiple-output (MIMO) will reduce transmit power, the input power requirements for transmission, as well as the computational costs involved, can be a significant factor in the power-energy efficiency of 5G small cell networks (especially when operating in backup mode). In a 3GPP radio access network (RAN) for an LTE system, the BTS may be a combination of an evolved Node B (also commonly referred to as an enhanced Node B, eNodeB, or eNB) and a radio network controller (RNC) in a universal terrestrial radio access network (UTRAN), which communicates with wireless mobile devices known as user equipment (UE). Downlink (DL) transmissions may be communications from the BTS (or eNodeB) to the wireless mobile devices (or UEs), and uplink (UL) transmissions may be communications from the wireless mobile devices to the BTS.

[0038] Base station (BS) power consumption is divided into three categories: transmit power, computational power, and power for base station operation. Transmit power is the power used by the power amplifier (PA) and RF chain, which perform wireless signal conversion, i.e., signal conversion between baseband and wireless radio signals. Computational power represents the energy consumed by the baseband unit (BBU), which contains the BS's digital single processing, management, and control functions, as well as the communication functions between the core network and the BS. All of these operations are performed by software and implemented on semiconductor chips. Additional power represents the power consumed to maintain BS operation. More specifically, additional power includes the power lost in switching from the power grid to the mains power supply, the power lost in switching between different direct current-to-direct current (DC-DC) power sources, and the power consumed for active cooling at the BS.

[0039] Power losses and outages are common in today's networks as a result of natural disasters, rolling blackouts, etc. Base stations include backup power sources (e.g., batteries), and while these forms of backup power may not provide sufficient power during extended AC power outages, the use of commercial wireless communication services may increase due to user needs and / or desires.

[0040] Operating a BS in sleep mode can be a method for reducing energy consumption in cellular networks, but this method focuses on output power and does not consider the loss or interruption of utility power at the input to the BS. Therefore, while queuing decision techniques for BS sleep techniques can maximize energy-efficient utilization of the BS in green communication networks, they are not applicable when utility power to the BS is lost.

[0041] A physical node or network node represents an access node (e.g., a wireless distribution unit) or a non-access node (e.g., a server and a router), while a physical link represents a fiber optic link between two physical nodes. Every physical node is characterized by a set of available resources, namely, computation (CPU), memory (RAM), and storage, which define the load characteristics of the cell. Each physical link is characterized by a bandwidth capacity and a latency value, which is the time required for a flow to traverse the link. Finally, both physical nodes and links have associated utilization power requirements for each type of available resource.

[0042] The power supply to the BS is rectified and regulated to a nominal metered DC voltage of 48 (i.e., direct current (VDC)), which is supplied to a backup battery or set of backup batteries for charging. The rectifier unit includes circuitry to keep the batteries fully charged and ready in case of utility power interruption or failure. When fully charged, the backup batteries are maintained at a voltage near 50 volts. Vendors / operators may also select a DC voltage of -24V or other DC voltage setting rather than the common 48V setting. Typically, battery pack parameters per customer requirements are on the order of 2 hours of operation time under a 100W (in this case, power is calculated per RU power consumption and is a variable amount) AC system, a 48.1V / 65Ah battery that can last approximately 150 minutes at full load, or other operator backup time setting (e.g., an operator may select 2 hours of battery backup, 4 hours, or 8 hours, depending on their desires or operational needs).

[0043] Base stations typically use a 48V input power supply that is stepped down to 24V or 12V by a DC / DC converter, which can be scaled down to match the DC voltage level of each module.

[0044] In 3GPP specifications, the UE's receive and transmit bandwidth may be adjusted to a subset of the total cell bandwidth, referred to as the BWP. The bandwidth may be configured to shrink during periods of low activity to reduce power, and the location of the bandwidth may also be changed to allow different services. In an exemplary embodiment, bandwidth adaptation may be achieved by configuring the UE with a BWP, informing the UE which of the configured BWPs is the currently active BWP.

[0045] 1 shows a graphical representation of a 5G or other data network 100 including multiple cells 121, 122, 123 that provide access to a network 105 for any number of UE devices 110. For simplicity, FIG. 1 shows only one user equipment (UE) device 110, but in practice, the concepts described herein may be scaled to support an environment 100 including any number of devices 110 and / or cells 121-123, as well as any type of network architecture for allocating bandwidth to different slices and performing other tasks as needed.

[0046] 1, a mobile phone or other user equipment (UE) device 110 suitably attempts to connect to the network 105 via an appropriate access cell 121, 122, 123. In the illustrated example, each cell 121 includes components for transmission, such as a base station controller 131, a base station transceiver 138, a node 140, an RF radio 135, a radio network controller 142, an antenna interface 132 and an antenna 133, as well as power components, such as a mains power interface 150, a battery circuit 154, and a backup power source 152, such as a UPS or battery 156.

[0047] The utility power interface 150 may receive AC power from a utility or other source. The antenna 133 and antenna interface 132 control signals to the UE 110. The radio network controller 142 may control RF transmit power via the RF radio 135 to conserve power usage to reduce the power consumption of the UPS 156. By reducing the communication bit rate, RF power may be reduced in decibels (“dB”). Step reduction may also be implemented. The battery circuit 154 may be configured as a rectifier-type switch that can switch the output power from the UPS 156 between multiple levels. The base station controller 138 may include a power control mechanism for controlling the power drawn by the base station 138. The base station controller 138 may also wirelessly communicate with a power management system 170 that may identify AC power outages or interruptions at the front end to change the power input power levels of the multiple small cells 121, 122, and 123, as well as the number of UEs 110 connected to the node 140 and resources within the slice of the node (gNB).

[0048] In an exemplary embodiment, the UE 110 may be configured with up to four BWPs for the downlink and uplink, but only one BWP for the downlink and one BWP for the uplink are active at a given time. The BWPs may be configured so that each UE 110 can operate at a narrow bandwidth and may notify the gNB to activate the full bandwidth if the user requests more data (bursty traffic). When the gNB configures a BWP, it includes the following parameters: BWP Numerology (u), BWP Bandwidth Size, Frequency Location (NR-ARFCN), and CORESET (Control Resource Set). For the downlink, the UE is not expected to receive PDSCH, PDCCH, CSI-RS, or TRS outside the active bandwidth portion. Each DL BWP includes at least one CORESET with a UE-specific search space (USS), while at least one of the configured DL BWPs for the primary carrier includes one CORESET with a common search space (CSS). For the uplink, the UE 110 should not transmit a PUSCH or PUCCH outside the active bandwidth portion. The UE 110 is expected to receive and transmit only within the frequency range configured for the active BWP with the associated numerology. However, there is an exception: the UE may perform radio resource management (RRM) measurements and may transmit a sounding reference signal (SRS) outside its active BWP via measurement gaps.

[0049] In an exemplary embodiment, the radio network controller 131 may implement logic implemented in computer-executable instructions stored in the device's memory, hard drive, or other non-transitory storage for execution by a processor included therein. The radio network controller 131 may also be configured with a remote radio unit (RRU) 160 for downlink and uplink channel processing. The RRU 160 may be configured to communicate with the baseband unit (BBU) 139 of the base station controller 131 over a physical communication link and with wireless mobile devices over an air interface.

[0050] In various alternative embodiments, the base station 138 may be separated into two parts, a baseband unit (BBU) 139 and a remote radio head (RRH) 141, allowing the network operator to maintain or increase the number of network access points (RRHs) to a node (gNB) while centralizing baseband processing functions in the master base station 175. Using the master C-RAN base station 175, the power management system 170 may be directed to coordinate the operation of the power levels of the multiple cells (121, 122, and 123) at the same time.

[0051] 2 is an exemplary flow diagram of a smart bandwidth (BW) adapter controller smart bandwidth adaptation call flow according to various embodiments. In FIG. 2, initially in step 5, smart BW control is enabled or set to always monitor for AC power outages or light network loads. In step 10, detection by the BW adapter controller is performed regarding whether a state change of AC power outage or light network load occurs. For example, a feedback communication loop for base station power management in response to a utility power interruption or failure in a base station power management system in a wireless data networking environment. Wireless AC power outage detection by a distribution unit (DU) or aggregation unit (CU) connected to a 5G network.

[0052] The Distributed Unit (DU) or Aggregation Unit (CU) or Management Function (NFMF) may also detect AC power outages by using the Fault, Configuration, Accounting, Per Formance, and Security (FCAPS) network model and activate appropriate solutions. For example, during an AC power outage, the RF radio will notify the Control Unit (DU / CU), and the DU / CU unit will begin moving all or nearly all user traffic to a designated subordinate BWP (e.g., the initial BWP) while shutting down all or nearly all other BWPs of the currently operating carrier.

[0053] Next, if it is determined that there is an AC power outage or light network load at the node, a small BWP will be initialized in step 15. The initial active small BWP is for the UE during initial access until the UE is explicitly configured with a BWP during or after RRC connection establishment. The initial active BWP is the default BWP unless otherwise configured.

[0054] In step 20, users are moved or assigned to smaller BWPs. For example, based on network configuration, the DU / CU may move all or nearly all users and / or slices to smaller BWPs during AC power outages or light network loads to minimize power consumption. The gNB will notify the UE of any change in the assigned BWP. The UE will stop monitoring the current BWP and will immediately switch to monitoring only the lower BWP. In multi-carrier operation, the DU / CU may also move all traffic to a single carrier based on BWP and / or slice priority settings.

[0055] The reduction from the wider bandwidth directly impacts the peak and data rate the user experiences. Operating the UE at a smaller BW than the configured CBW may enable support for wideband operation while reducing power. In step 25, the adaptive bandwidth module continues to monitor for AC power outages or light network loads, and if utility power resumes, in step 35, BWPs are restored for the entire channel. After full power is restored or the RAN load increases, the gNB may reactivate all dedicated BWPs and / or slices and seamlessly move users to their individual BWPs and / or slices.

[0056] Normal operation is again resumed and the power consumption level increased in step 40. Alternatively, if step 25 still determines that there is an AC power outage or light network load, feedback action occurs to delay the restoration of normal operation in all BWPs for the entire channel BW in step 30. The node remains in a limited operating state configured with a small BWP, and the BW adaptation unit continues to wait for the utility power to resume or the load to increase.

[0057] Bandwidth reduction operations and corresponding allocations to UEs may also occur in multi-user MIMO (MU-MIMO) operation if the RAN scheduler determines that all or nearly all currently serving users can be assigned to the same lower-level physical resource block (PRB). In this case, the DU / CU units may block current transmissions occurring on other subcarriers (i.e., each PRB may consist of up to 12 subcarriers), which may also result in power savings for the BS. Lower-level PRB allocations for MU-MIMO may also be prioritized based on the active BWP and / or predefined slice priorities.

[0058] FIG. 3 is an example flow diagram of a smart bandwidth (BW) adapter controller smart bandwidth adaptation call flow according to various embodiments. In FIG. 3, in step 305, the BW adapter controller is initiated in the smart BW adaptation call flow, similar to FIG. 2, and in step 310, it is determined whether an AC power outage or a light network load state change occurs in the node. If the determination is affirmative, in step 315, an initialization slice reallocation process is performed. In step 320, various slices are reallocated from their current slice allocation to smaller BWPs. Network slicing is configured such that each active slice is associated with a separate BWP, which enables the UE to systematically automatically transfer each active slice to a BWP in a scheduled order during an AC power outage or light network load to reduce power consumption by accessing the gNB through pre-configured slice control and BWP association.

[0059] For example, an operator may choose to merge all active slices in a network or at a node into a smaller BW. The operator may choose to define profiles, settings, etc. for each BW that constitutes the BW, and may also select alternative slice mappings for allocation during power interruptions, AC power outages, light network loads, etc. This may be useful when there are multiple BWs that can be defined for use in such conditions when the full BW is not needed or power conservation is desired. Provisioning or selection may be incrementally allocated all at once and re-allocated in a similar manner for normal operation. The operator may also choose to terminate provisioning of some slices as needed, and continue to enable only certain higher-priority slices for premium use or both premium and non-premium access. Furthermore, usage may be selected for an entire preset period or configured for a given period to select a set of users. As step 325, the BW controller adapter, as in FIG. 2, continues to check whether utility power has been restored, and if not, continues with the configured and mapped slices selected for reduced power or load operation, via step 330. In step 335, if the mains power is restored or the load increases beyond a certain threshold, all previous slices, or all slices that could be enabled without the previous restriction, will be restored and normal operation will be restored to all UEs given access.

[0060] FIG. 4 illustrates a functional diagram of the BWP portion of an exemplary smart BW adaptation call flow before and after AC power outage, according to various exemplary embodiments. In FIG. 4, an operational carrier (e.g., 20 MHz) is shown with a BWP configuration 410 before AC power outage, including a four-part configuration set including (a) an initial BWP, (b) a BWP assigned number 1, (c) a BWP assigned number 2, and (d) a BWP assigned number 3, which constitute the overall BWP used by all UEs during initial access and a dedicated BWP for a UE or group of UEs used for data allocation by the gNB (i.e., RAN+DU / CU). Additionally, each of BWPs 1-3 and the initial BWP may include multiple smaller BWPs (not shown). In various alternative embodiments, multiple smaller BWPs may be predefined by the operator for use in configuration during AC power outage (420). Alternatively, BWPs 1-3 may gradually decrease in the operational BWP. For example, a stepwise approach to reduction may be used, where the BW reduction (i.e., converting certain BWPs to an inactive state) is increased in 25% increments corresponding to a progressively fewer number of BWPs in use. By gradually or incrementally reducing the number of active BWPs, the BW adapter attempts to maintain a certain threshold of cell site quality of service (QoS) in the event of a brief AC power outage.

[0061] FIG. 5 illustrates an example slice arrangement flow diagram before and after an AC power outage, according to various embodiments. FIG. 5 shows a slice arrangement 510 with an active carrier (e.g., 20 MHz) that is an arrangement of four slices in a gNB node before an AC power outage 510. In this case, the slice arrangement consists of a set of four slices: (a) a slice assigned number 0, (b) a slice assigned number 1, (c) a slice assigned number 2, and (d) a slice assigned number 3. After an AC power outage 520, the slice arrangement 530 is reconfigured into two slices: (a) a slice assigned number 0 and (b) a slice assigned number 1. In this case, slices numbered 1-2 correspond to the reconfigured BWP, specifically the active carrier (e.g., 20 MHz) of the BWP portion of (a) the initial BP, and the remaining slices are assigned to “all subcarriers TX with Pwr=0,” i.e., inactive mode. As illustrated in 540, the network slicing of the exemplary embodiment of slice #0 and slice #1 can be associated with the initial BWP. This would allow slice #0 and slice #1 to remain enabled in the initial BWP. Thus, power is saved twice by the selected slice (i.e., slice #0 and slice #1) and by using only the initial BWP for the selected slice. That is, all other subcarrier BWPs are shut off and Tx Pwr=0. The operating carrier frequency remains at 20 MHz in this case. Therefore, during an AC power outage or light network load, power consumption is minimized first by the enabled slice and then by the assigned BWP (initial BWP) (i.e., the process of merging all slices into smaller BWPs). Operators may define other BWPs and different slice mappings as needed. The depicted implementation of merging slices into the initial BWP is considered to be one of various ways in which moving users to smaller BWPs and allocating slice provisioning associated with BWPs can be implemented to achieve power savings.

[0062] In an exemplary embodiment, from a network perspective, a mixed deployment may be implemented. For example, an exemplary deployment may be: i) some cells support slices numbered (0 and 1) for premium users with higher power usage and higher transmission rates, which are assigned to different frequencies than slices 2 and 3 of a macro / public cell with lower transmission rates and subsequent lower power usage; and ii) some cells would continue as normal in the event of an AC power outage not supporting both sets of slices (0 and 1) and (2 and 3). Thus, due to an AC power outage, some cells that would normally be fully active for premium and non-premium slice access for slices (0 and 1) and (2 and 3), respectively, are not enabled. In other words, there would be no fully slice-enabled cells, and all available cells would have reduced functionality with not all slices enabled, resulting in reduced power consumption and limited slice access in favor of premium users.

[0063] In an exemplary embodiment, a premium user is camped on a cell that is not a macrocell, but does not offer slices 2 and 3 due to a reduction in the number of available slices caused by an AC power outage (normally slices 2 and 3 are accessible). In this case, the user's UE would normally not frequently attempt to access slices 0 and 1, but if slices 2 and 3 are unavailable in another cell due to an AC power outage, the UE's capability to reselect another cell would be changed, and the UE would begin attempting to access slices 0 and 1, which are available in the current cell on which the UE is camped.

[0064] FIG. 6 illustrates an exemplary flowchart for reassigning users to smaller BWPs in response to an AC power outage, power interruption, or light network load in accordance with various embodiments. In FIG. 6 , at task 610, an AC power outage is detected or determined in response to various methods, such as via feedback (i.e., a message) communicated and received by the base station controller of an impending AC power interruption or AC power outage detected in another part of the network or from monitoring the input current to the current base station. Consequently, at task 620, an adaptive bandwidth solution is performed to change the current BWP configuration to a new, smaller BWP configuration. For example, the base station may currently operate over a carrier on a selected frequency (e.g., 20 MHz) with a complementary BWP arrangement of four BWP portions: an initial BWP and other BWPs (1-3) that currently constitute the entire BWP in use by the initial access and connected UEs (i.e., essentially all UEs in use), or a dedicated BWP for the UE or group of UEs currently being used for data allocation by the gNB (i.e., RAN+DU / CU). Additionally, each of the initial BWP and BWPs 1-3 may include multiple smaller BWPs. In task 630, multiple sets of smaller BWPs may be pre-configured for use during AC power outages, light network loads, or power interruption-type conditions that occur. The number of BWPs 1-3 in use may also be incrementally decreased. Each time the number of BWPs in use is incrementally decreased, in task 640, the input power, load, and communications of the network power interruption may also be monitored by the BWP adapter to adjust the number of BWPs in use (i.e., to continue increasing or decreasing the number of active BWPs) and to maintain certain thresholds of cell site QoS during changed power or load conditions.

[0065] FIG. 7 illustrates an example flowchart of network slicing in response to or associated with an AC power outage, a power interruption, or a light network load condition, according to various embodiments.

[0066] In the flowchart of FIG. 7, an AC power outage is detected at task 710. Lower input power or load consumption (i.e., light network load) may also be detected or determined in the network, and a network slice management algorithm is executed by a BW adapter to reduce slice allocations in gNB nodes connected to the base station. For example, at task 720, slice allocations may be assigned to a default setting for essential services or a subsequent allocation to reduce non-essential services. At task 730, access to the reduced number of slices used and allocated at the gNB may be balanced for access between premium enterprise users and non-premium enterprise users, with premium enterprise users being given priority for non-essential services as long as QoS can be met. For example, in one scenario, with two sets of available slices, each set may be one of slices that may have a default setting for essential services (and only one set with access to non-essential services), where premium enterprise users may be assigned access to both sets of slices. The sets of available slices for both essential and non-essential services are then restricted by a priority scheme that allocates access to premium users. Non-premium users may be given only lower priority access and therefore may only access essential services, which may be restricted by a different priority scheme, while maintaining an appropriate level of QoS. At task 740, premium and non-premium user access and power usage may be reconfigured to minimize power consumption gNBs from slice control and BWP association. An operator may choose to merge all slices available at a gNB node into a smaller BWP. In another example, an operator may choose to define a mapping between BWPs and slicing during an AC power outage when there are multiple BWPs defined for use during an AC power outage. An operator may also choose to terminate the provision of some slices and continue only higher priority slices.

[0067] In task 750, after full power restoration or increased RAN load, the gNB may reactivate all dedicated BWPs and / or slices and seamlessly reassign users to their individual BWPs and / or slices. The reduced bandwidth allocation at the UE may occur in multi-user MIMO (MU-MIMO) operation. That is, if the RAN scheduler operates in MU-MIMO operation and determines that all serving users can be assigned to the same lower-order PRB, the DU / CU may turn off transmissions on other subcarriers, thereby resulting in power savings. The allocation of lower-order PRBs for MU-MIMO may be prioritized based on predefined priorities of BWPs and / or slicing.

[0068] 8 is an example diagram of a UE and network configuration according to one embodiment. A UE 810 includes a processor 815 for implementing various logical solution functions for registering and receiving broadcast system information, initiating PDU sessions for implementing cell selection and reselection, ranking neighboring cells, configuring different operating modes of the UE, etc. The UE 810 may include a cell reselection module 825, an input / output interface 805, a memory 830 for storing measurement reports, neighboring cell ranking data, and a measurement module 835 for calculating neighboring cell distances and other criteria through various solutions and for accessing nearby cells for premium and non-premium users. A network 840 may include a base station 875, a processor 845 for registering the UE for slice access, a cell ID module 855, a broadcast module 848 for broadcasting slice IDs, slice offset values ​​for neighboring cells, and other system information, an authentication module 850 for authenticating the UE, a network slice 870, etc., and a BW adaptation module 860. The UE 810 communicates with the network and reads system information broadcasted in the cell 910 in which the UE 810 is camped in idle mode. For example, if the UE 810 is camped on cell A, the UE 810 will receive slice IDs and slice offset values ​​for neighboring cells of cell A via the transceiver 820 and will process the information via the processor 815 to perform and calculate measurements using a cell reselection equation of the cell reselection module 825 (e.g., using cell reselection logic or process) to select the next cell if the cell reselection process is based on the rankings of the neighboring cells.

[0069] The BW adaptation module 860 (i.e., BW management unit) may communicate through an element management system (EMS) 890 (i.e., control unit) to direct various logical components of the cell 910 (shown in FIG. 1 ) through automated workflows, such as the radio receiver, UPS, battery circuit (i.e., DC power supply), cell site (i.e., node) call / dropped call / operating throughput, and server components. The EMS 890 monitors the various nodes and cells in the network via the distribution unit (DU) 930 and aggregation unit (CU) 940, and controls or sends instructions to the various components of the cell 910 to maintain the cell site's quality of service (QoS). The automated workflows maintain network availability and monitor the status of network devices, including the utility power supply that supplies the network. The EMS 890 may also be connected to multiple eNodeBs for power management. In the event of an AC power outage in the network, the automated workflow monitoring the network will instruct the EMS 890 through various logic components to reduce the output power of the radio receivers, and will also take other factors into account by communicating with the radio receivers, cell sites through a router (or another communication link) connected to the server 920 while reducing the output power for transmission, thereby reducing DC power and UPS consumption.

[0070] In an exemplary embodiment, the server 920 may be configured as an NB-IoT server, which is software for data collection and monitoring and communication through routers to activate automated workflows via the EMS 890, and may display log messages for each base station and the live status of all sessions (including information on signal, power, etc.).

[0071] After detecting a utility power interruption, power failure, power loss, and / or loss of AC power to the network, automated workflows monitoring components and networks detect the change and power loss. The automated workflows responsive to the detected power loss implement slice allocation and configuration management functions for available BWPs in the cell 910 via the BW Adaptation Module 860. The EMS 890 communicates with the radio receiver, server 920, and other components associated with the cell site to collect cell statistics and perform appropriate base station radio receiver plug-and-play functions via the cell site router to the receiver. The automated workflows perform various functions for the element management system based on the determinations from the BW Adaptation Module 860 and data from the cell site and base stations.

[0072] As described, the power management system includes several data processing components, each of which may be patentable and / or have patentable aspects, or has processing hardware capable of performing patentable automated processes. This document is not intended to limit the scope of the claims or the invention in any way, and various components and aspects of the system described herein may be implemented separately and apart from other aspects.

Claims

1. an element management control unit including a distribution and aggregation unit (DU / CU) for monitoring power and traffic loads at a plurality of nodes in the network; a BW management unit communicating with the DU / CU to reallocate a set of network slices to a set of smaller Bandwidth Portions (BWPs) at a node; the BW management unit configured to define a smaller BWP from the set of smaller BWPs from a slice mapping for slice reallocation during an AC power outage, the slice mapping including the set of network slices associated with the set of smaller BWPs in the network; the BW management unit configured to adapt a BW to a user of the node by reallocating at least one network slice at the node to a defined smaller BWP in response to at least one of the conditions determined by the BW management unit: an AC power outage; and a traffic load reduction at the node. A system for relating network slicing to adaptive bandwidth (BW) management, comprising:

2. and the DU / CU for transmitting data about the determined condition to the BW management unit in response to at least one of the determined conditions of an AC power outage and a traffic load reduction to terminate provision of one or more network slices. The system of claim 1 further comprising:

3. the BW management unit configured to automatically initiate a network slice re-allocation process at the node in response to data about a power loss and a decrease in the traffic load received from the DU / CU monitoring a node of the network, wherein the use of the set of smaller BWPs does not require a change of carrier at the node; The system of claim 1 further comprising:

4. the BW management unit configured to shut off transmission of associated subcarriers of the network at the node in order to reduce power consumption; The system of claim 2 further comprising:

5. the BW management unit configured to communicate with the radio receiver of the node to exchange messages about requirements of elements of the node based on an operation to use a smaller BWP at the node to reduce an output power of the radio receiver of the node by taking into account data received by the DU / CU indicating merging of the network slice at the node to the smaller BWP; The system of claim 4 further comprising:

6. The gNB controlled by the radio network has the DU / CU configured to monitor AC power outages and to activate a network slice re-allocation process at the gNB node. The system of claim 5 further comprising:

7. The DU / CU is configured to transmit data about the condition to the BW management unit to terminate provision of one or more network slices while enabling provision of higher priority network slices. The system of claim 5 further comprising:

8. a wireless controller of the node instructed by the BW management unit to monitor users in designated subordinate BWPs according to user traffic data received from the DU / CU to control routing of power from the backup battery and to reduce power consumed by the node via a battery controller to reduce power drawn by the backup battery; The system of claim 7 further comprising:

9. configuring an element management control unit including a distribution and centralization unit (DU / CU) for monitoring power and traffic loads at a plurality of nodes in the network; Communicating with the DU / CU by a BW management unit to reallocate a set of network slices to a set of smaller bandwidth portions (BWPs) at a node; configuring the BW management unit to define smaller BWPs from the set of smaller BWPs from a slice mapping for slice reassignment during an AC power outage, the slice mapping including the set of network slices associated with a set of smaller BWPs in the network; adapting, by the BW management unit, a BW for a user of the node by reallocating at least one network slice at the node to a defined smaller BWP in response to at least one of the conditions determined by the BW management unit, the condition being an AC power outage and a decrease in traffic load at the node. A method for adaptive bandwidth (BW) management, comprising:

10. In response to at least one of the determined conditions of an AC power outage and a traffic load reduction, transmitting data about the condition by the DU / CU to the BW management unit to terminate provision of one or more network slices. The method of claim 9 further comprising:

11. In response to data about a power loss and a decrease in the traffic load received from the DU / CU monitoring a node of the network, automatically initiating a network slice reassignment process at the node by the BW management unit, wherein using the set of smaller BWPs does not require a change of carrier at the node. The method of claim 10 further comprising:

12. and shutting off transmission of associated subcarriers of the network at the node by the BW management unit to reduce power consumption. The method of claim 11 further comprising:

13. By taking into account data received by the DU / CU indicating network slice reallocation at the node, communicating with the radio receiver of the node by the BW management unit to exchange messages about operating elements at the node using a smaller BWP at the node to reduce the output power of the radio receiver of the node. The method of claim 11 further comprising:

14. Controlling access by the user of the gNB node via the wireless network using data from the DU / CU that monitors AC power outages, and activating the network slice reassignment process at the gNB node. The method of claim 13 further comprising:

15. Sending data about the condition from the DU / CU to the BW management unit to terminate provision of one or more network slices while enabling provision of higher priority network slices. The method of claim 14 further comprising:

16. directing, by the wireless controller of the node by the BW management unit monitoring the users reallocated by provision of a network slice at the node, routing of power from a backup battery to reduce the power consumed by the node via a battery controller and to reduce power drawn by the backup battery; 16. The method of claim 15, further comprising:

17. an element management control unit including a set of distribution and centralization units (DU / CU) for monitoring power and traffic loads at multiple cell sites in the network; a BW management unit that adapts BW to users of cell sites in the network by moving users to a set of smaller bandwidth portions (BWPs) at cell sites in response to a set of conditions determined by the BW management unit, the set of conditions including at least one of an AC power outage and a reduction in traffic load at one or more cell sites of the network; the BW management unit responding to at least one of the conditions of an AC power outage and a traffic load reduction based on data about the condition received by the DU / CU to move user traffic to a designated subordinate BWP while shutting down other BWPs at the cell site to conserve power at the cell site; A system for adaptive bandwidth (BW) management, comprising:

18. the BW management unit configured to automatically initialize a set of smaller BWPs at a cell site in response to data about a power loss and a reduction in the traffic load received from the DU / CU monitoring a cell site of the network, wherein use of the set of smaller BWPs does not require a change of carrier at the cell site; The system of claim 17 further comprising:

19. The designated subordinate BWP is configured as a single carrier based on the carrier of the previous BWP; Transmission of the associated subcarrier of the network at the cell site is also shut off to reduce power consumption.

20. The system of claim 18.

20. the BW management unit configured to communicate with the radio receiver of the cell site to exchange messages regarding requirements of elements of the cell site based on operation using the smaller BWP at the cell site, to reduce the output power of the radio receiver of the cell site by taking into account data received by the DU / CU indicating a smaller BWP to operate at the cell site; 20. The system of claim 19, further comprising:

21. The cell site including the gNB node controlled by a wireless network having the DU / CU configured to monitor AC power outages and to activate an adaptive BW process at the gNB node.

21. The system of claim 20, further comprising:

22. the DU / CU configured to initiate migration of user traffic to the designated subordinate BWP while shutting down other BWPs of the carrier operating at the cell site.

22. The system of claim 21 further comprising:

23. a wireless controller at the cell site instructed by the BW management unit to monitor the users in the designated subordinate BWPs according to user traffic data received from the DU / CU to control routing of power from a backup battery and to reduce power consumed by the cell by a battery controller at the cell site to reduce power drawn by the backup battery; 23. The system of claim 22, further comprising:

24. configuring an element management control unit including a set of distribution (DU) and aggregation units (DU / CU) for monitoring power and traffic loads at a plurality of cell sites in the network; by a BW management unit coupled to the element management control unit, adapting BW for the users at cell sites in the network by moving the users to a set of smaller bandwidth portions (BWPs) at the cell sites in response to a set of conditions determined by the BW management unit, the set of conditions including at least one of an AC power outage and a reduction in traffic load at one or more cell sites of the network; and in response to at least one of the determined conditions of an AC power outage and a traffic load reduction, moving the user to a designated lower BWP of the set of smaller BWPs at the cell site based on data received from the DU / CU to the BW management unit while shutting down other BWPs at the cell site to conserve power at the cell site. A method for adaptive bandwidth (BW) management, comprising:

25. and automatically initializing, by the BW management unit, the set of smaller BWPs at the cell site in response to data about a power loss and a decrease in the traffic load received from the DU / CU, wherein use of the set of smaller BWPs does not require a change of carrier at the cell site.

25. The method of claim 24, further comprising:

26. The designated subordinate BWP is configured as a single carrier based on the carrier of the previous BWP; Transmissions on associated subcarriers at the cell site are also shut off to reduce power consumption.

26. The method of claim 25.

27. exchanging messages with the radio receiver at the cell site by the BW management unit for operating components at the cell site to reduce output power of the radio receiver at the cell site by taking into account data indicating the set of smaller BWPs operating at the cell site; 27. The method of claim 26, further comprising:

28. Controlling the gNB node by a wireless network based on data from the DU / CU of the AC power outage and traffic load at the gNB node, and initializing an adaptive BW process.

28. The method of claim 27, further comprising:

29. Initiating the adaptive BW process based on data from the DU / CU to move user traffic to the designated subordinate BWP while shutting down other BWPs operating carriers at the cell site.

30. The method of claim 28, further comprising:

30. monitoring, by a wireless controller at the cell site, the users in the designated subordinate BWPs according to traffic load data received from the DU / CU to control routing of power from a backup battery and to reduce power consumption at the cell site; 30. The method of claim 29, further comprising:

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