Handling power overshooting
The network node employs dynamic power reduction strategies based on channel priorities and SINR to manage power overshooting, ensuring reliable transmission and efficient resource use in wireless communication systems.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- Filing Date
- 2024-10-28
- Publication Date
- 2026-05-07
AI Technical Summary
Existing methods for handling power overshooting in wireless communication systems, such as power overbooking and selective power reduction, often result in reduced channel capacity, interference, and unreliable transmission of low-priority channels, particularly in scenarios with high load or mixed priority channels.
A network node dynamically selects power reduction strategies based on channel priorities, modulation type, PRB usage, and SINR, employing techniques like selective PSD reduction, clipping, and transmission abandonment to manage power overshoot effectively.
Ensures robust quality of service for critical applications, maintains cell edge coverage, and maximizes resource utilization efficiency by adaptively handling power overshooting.
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Figure CN2024127635_07052026_PF_FP_ABST
Abstract
Description
HANDLING POWER OVERSHOOTINGTECHNICAL FIELD
[0001] The invention relates to a method for handling power overshooting of one or more scheduled channels performed by a network node. The invention further relates to a network node, a computer program, and a computer program product.BACKGROUND
[0002] In the landscape of wireless communication systems, the optimization of Radio Unit (RU) efficiency and cost reduction are paramount objectives, particularly in telecommunication scenarios characterized by multi-carrier configurations. The network services may experience relatively low traffic volume, resulting in low overall utilization and the power amplifier (PA) operating continuously in inefficient zones. To improve the current situation, a practice known as power overbooking (PoB) is often embraced. PoB involves allowing the cumulative maximum power of each carrier configuration to exceed the total power available for the RU. However, in certain high-load scenarios, it is possible for individual slots to consume more power than the total RU capability of max transmission power, power overshoot is another saying. When such instances arise, it becomes essential to explore effective strategies for managing this phenomenon. A common method to manage power overshoot is the reduction of the power spectral density (PSD) by the RU. This approach entails lowering the PSD of the RU, resulting in a decrease of channel capacity. While this adjustment significantly impacts users at the cell edge, those closer to the cell center, who receive ample power, are less affected. Therefore, this method is typically suitable for interference-limited small cells in densely populated urban areas. However, its application may negatively affect the coverage of large cells with limited interference.
[0003] Another approach entails selectively choosing low-priority channels and then reducing their transmission power or even refraining from transmitting them altogether to ensure that the total transmission power meets the specified hardware (HW) capability. This approach is designed to minimize disruptions to high-priority channels, ensuring that critical services maintain their quality of service without interruption. While this approach effectively manages power allocation and preserves the quality of service for high-priority channels, it can have significant implications for the transmission of low-priority channels. In some instances, reducing the transmission power or omitting low-priority channels altogether may lead to a 100%Block Error Rate (BLER) for these channels, impacting their reliability and performance. However, the effectiveness of this method is contingent upon the availability of an adequate number of low-priority channels within a given time slot. It is crucial to note that when a time slot predominantly comprises high-priority channels or low-priority channels with minimal power consumption, implementing this approach becomes impractical. Furthermore, just blindly through this way, the inappropriate division rule of channels into high and low priority categories may render the approach impracticable in certain scenarios as well.
[0004] WO2024010499A1 further discusses some of the challenges described above.SUMMARY
[0005] It is an object of the invention to further facilitate the handling of power overshooting. A first aspect of the invention relates to a method performed by a network node for handling power overshooting of one or more scheduled channels. The method comprises obtaining at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels; modulation type and physical resource block, PRB, usage of one or more scheduled channels; signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels. The method further comprises performing at least one power reduction method. The at least one power reduction method being based on the at least one indication. Hereby is achieve the enabling of the network node to reduce the power of one or more scheduled channels.
[0006] According to an embodiment, the at least one power reduction method is performed until the target power reduction has been achieved.
[0007] According to an embodiment, performing the at least one power reduction method, comprises: in response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels, selectively decreasing a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities. Hereby is achieved the enabling of the network node to reduce the power of one or more scheduled channels with low priority.
[0008] According to an embodiment, selectively decreasing a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities, comprises selectively decreasing the PSD of the one or more scheduled channels with low priority to zero, in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction.
[0009] According to an embodiment updating the target power reduction by subtracting an accumulative decreased power of the one or more scheduled channels with low priority, from the target power reduction.
[0010] According to an embodiment, performing the at least one power reduction method, comprises, in response to the target power reduction being not achieved or in response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels; and in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINRs of the one or more scheduled channels, being equal or larger than a SINR threshold, or in response to a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type; clipping a peak of transmission power of the one or more physical channels. Hereby is achieved the enabling of the network node to reduce the power of one or more scheduled channels while taking into account characteristics of the channel.
[0011] According to an embodiment, clipping is performed until the target power reduction has been achieved.
[0012] According to an embodiment, performing the at least one power reduction method, comprises, in response to the target power reduction being not achieved or in response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels; and in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINR of the one or more scheduled channels with non-zero power, being smaller than a SINR threshold; and in response to a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type; decreasing PSD of the one or more scheduled channels. Hereby is achieved the enabling of the network node to reduce the power of one or more scheduled channels while taking into account characteristics of the channel.
[0013] According to an embodiment, the decreasing is performed until the target power reduction has been achieved.
[0014] According to an embodiment, the SINR threshold is based on the target power reduction, and / or obtained by the network node.
[0015] According to an embodiment, a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold. Further, according to an embodiment, a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.
[0016] According to an embodiment, the one or more scheduled channels are one or more scheduled channels with non-zero power.
[0017] According to an embodiment, the one or more scheduled channels are one or more scheduled physical channels.
[0018] According to an embodiment, a scheduled channel with low priority excludes at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a physical downlink control channel, PDCCH; a physical reference signal.
[0019] According to an embodiment, wherein the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.
[0020] According to an embodiment, the priority threshold is obtained by the network node.
[0021] A second aspect of the invention relates to a network node for handling power overshooting of one or more scheduled channels comprising processing circuitry and a memory. The network node configured to obtain at least one indication related to a target power reduction and wherein the at least one indication further relates to at least one of: priority of one or more scheduled channels; modulation type and physical resource block usage of one or more scheduled channels; signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels. The network node further configured to perform at least one power reduction method, the at least one power reduction method being based on the at least one indication.
[0022] According to an embodiment the network node is, adapted to perform the method for handling power overshooting of one or more scheduled channels, and any one of the related embodiments.
[0023] A third aspect of the invention relates to a network node, adapted to perform the method for handling power overshooting of one or more scheduled channels, and any one of the related embodiments.
[0024] A fourth aspect of the invention relates to a computer program, comprising instructions that, when executed by processing circuitry, cause the processing circuitry to carry out the method for handling power overshooting of one or more scheduled channels, and any one of the related embodiments.
[0025] A fifth aspect of the invention relates to a computer program product, comprising a computer-readable medium, comprising instruction that, when executed by processing circuitry, cause the processing circuitry to carry out the method for handling power overshooting of one or more scheduled channels, and any one of the related embodiments.
[0026] A sixth aspect of the invention relates to a tangible, non-transient computer-readable medium comprising instructions. The instructions, when executed by processing circuitry, cause the network node to perform operations comprising obtaining at least one indication related to a target power reduction and wherein the at least one indication further relates to at least one of: priority of one or more scheduled channels; modulation type and physical resource block, PRB, usage of one or more scheduled channels; signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels. The instructions, when executed by processing circuitry, cause the network node to perform operations further comprising performing at least one power reduction method. The at least one power reduction method being based on the at least one indication.BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 illustrates a first embodiment of a method for handling power overshooting of one or more scheduled channels.
[0028] Figure 2 illustrates a second embodiment of a method for handling power overshooting of one or more scheduled channels.
[0029] Figure 3 illustrates a third embodiment of a method for handling power overshooting of one or more scheduled channels.
[0030] Figure 4 illustrates a fourth embodiment of a method for handling power overshooting of one or more scheduled channels.
[0031] Figure 5 illustrates a fifth embodiment of a method for handling power overshooting of one or more scheduled channels.
[0032] Figure 6 illustrates a sixth embodiment of a method for handling power overshooting of one or more scheduled channels.
[0033] Figure 7 illustrates a seventh embodiment of a method for handling power overshooting of one or more scheduled channels.
[0034] Figure 8 illustrates an example of a communication system in accordance with some embodiments. Figure 9 illustrates a network node in accordance with some embodiments.
[0035] Figure 10 is a block diagram illustrating a virtualization environment in which functions implemented by some embodiments may be virtualized.
[0036] Figure 11 illustrates a computer program product in accordance with some embodiments.DETAILED DESCRIPTION
[0037] Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.
[0038] The present invention proposes solutions for handling of power overshooting of scheduled channels, wherein a network node utilizes information (scheduled channels priorities, modulation type, physical resource block usage, Signal to Interference and Noise Ratio, SINR, etc. ) to dynamically select appropriate power overshoot handling strategies from several candidate strategies. The power overshoot handling strategies may include clipping technologies, digital power backoff, selective power spectral density (PSD) reduction and selective abandoning transmissions. The proposed solutions may provide at least one of the following technical advantages: guaranteeing robust quality of service for critical applications and / or signaling; ensuring coverage for users located at the cell edge; maximizing resource utilization efficiency. In summary, the adaptive and flexible nature of the described solutions herein for handling of power overshooting allows dynamic selection of power overshooting handling strategies based on the consideration of channel priorities, coverage requirements, and resource utilization, etc.
[0039] Figure 1 illustrates a first embodiment of a method 1000 for handling power overshooting of one or more scheduled channels.
[0040] According to the first embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0041] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0042] As an example of obtaining 1100, the network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0043] An indication refers to information obtained by the network node, or refer to a signal obtained, or received, or monitored, or procured by the network node containing information.
[0044] The information stated above is related to a target power reduction, a priority of one or more scheduled channels, a modulation type and physical resource block (PRB) usage of one or more scheduled channels, SINR of one or more scheduled channels.
[0045] A target power reduction refers to an amount of power to be removed from a transmission so that the cumulative transmission power of one or more scheduled channels is equal or below the maximum transmission power. The maximum transmission power refers to the maximum amount of power that a transmitter can allocate to a transmission, as an example the maximum emission power at the transmitter antenna connector.
[0046] A priority of one or more scheduled channels refers to the level of importance assigned to a channel (as example a communication channel, a physical channel, etc. ) over which data is transmitted. The priority influences how resources are allocated and managed, particularly in scenarios where multiple channels or data streams compete for limited resources, as example bandwidth, maximum number of concurrent channel transmissions, maximum cumulative transmission power of the multiple channels, etc. As an example, a priority is a value e.g., between 0 and 255, between -10 and 10, between –15 and -5, etc.
[0047] A scheduled channel with low priority or with high priority, is a scheduled channel with an assigned low priority, or high priority, respectively.
[0048] As an example, a scheduled channel is a scheduled channel with low priority if a priority of the scheduled channel is below a priority threshold. As an example, a priority threshold is a determined, and / or fixed value between 0 and 255, when the priority is a value between 0 and 255. According to the example, if the priority of the scheduled channel e.g., 0, 15, 50, 100, 130, 255, etc., is below a determined priority threshold e.g., 0, 15, 55, 76, 100, 111, 130, 300, 255, etc., the scheduled channel is a scheduled channel with low priority.
[0049] As another example, a scheduled channel is a scheduled channel with low priority if a priority of the scheduled channel is below a priority threshold. As an example, a priority threshold is a value between -15 and 10, when the priority is a value between -15 and 10. According to the example, if the priority of the scheduled channel e.g., 0, 10, -1, -10, -15, etc., is below the priority threshold e.g., 0, 5, 10, -5, -11, -15, etc., the scheduled channel is a scheduled channel with low priority.
[0050] A modulation type, or modulation scheme, refers to the specific method used to modify the carrier wave, or signal, to encode data for transmission over that channel. The choice of modulation technique can affect the efficiency, bandwidth usage, data rate, and robustness of the communication. Examples of modulation types are quadrature amplitude modulation (QAM) (4-QAM, 16-QAM, 64-QAM, 256-QAM, etc. ) , phase shift keying (PSK) (binary PSK, 4-PSK, quadrature PSK, 8-PSK, etc. ) , orthogonal frequency division multiplexing (OFDM) , single carrier frequency division multiplexing (SC-FDM) , etc.
[0051] A physical resource block (PRB) refers to a unit of resource allocation in the time and frequency domains. It is used to allocate resources such as bandwidth and time for transmitting and receiving data, control signals, and other communication purposed in communication networks. A scheduled channel will use one or more PRBs.
[0052] A signal-to-interference plus noise ratio (SINR) refers to the ratio between the power of a signal, and the power of interference summed with the power of noise. A higher SINR value of the one or more scheduled channels indicates a better quality of those channels.
[0053] The method 1000 further comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. As an example, the at least one power reduction method is performed until the target power reduction has been achieved.
[0054] A power reduction method refers to a method for reducing the power of each of the one or more scheduled channels, e.g., the transmission power of one or more scheduled channel. Power reduction methods are, for example, reducing the power spectral density (PSD) of the one or more scheduled channels, reducing the PSD of one or more scheduled channels with a lower priority, clipping the one or more scheduled channels, etc. Each of the power reduction methods has its own advantages and disadvantages.
[0055] A power spectral density (PSD) refers to a measurement of a signal / channel power intensity in the frequency domain.
[0056] A PSD reduction of one or more scheduled channels refers to a reduction of the PSD allowed to the one or more scheduled channel, this causes a reduction in the cumulative transmission power of the one or more scheduled channel and decrease the SINR of the one or more scheduled channels. In a cell-edge of a communication system, the SINR of a scheduled channel is usually low and thus a further reduction of the SINR of the scheduled channel caused by the PSD reduction of the one or more scheduled channels may cause a reduction of the coverage of the communication system.
[0057] A clipping of one or more scheduled channel refers to a reduction of the peak transmission power of one or more scheduled channels, in this way a peak-to-average power ratio (PAPR) of the one or more scheduled channels is reduced. The clipping of one or more scheduled channel may lead to an increase in error vector magnitude (EVM) of the one or more scheduled channels, particularly affecting scheduled channels utilizing higher order modulation types, e.g., 64-QAM, 256-QAM, 1024-QAM, etc. Further, the clipping of one or more scheduled channels has minimal effect on the scheduled channel utilizing lower order modulation types, e.g., binary PSK (BPSK) , quadrature PSK (QPSK) , etc. Lower order modulation types are mostly used in the cell-edge of a communication system, the clipping of one or more scheduled channels has a limited impact to the coverage of a communication system.
[0058] Figure 2 illustrates a second embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0059] According to the second embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0060] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0061] The network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0062] The method 1000 further comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. The at least one power reduction method is performed until the target power reduction has been achieved.
[0063] The performing 1200 comprises, in response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels: selectively decreasing 1210 a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities.
[0064] The network node performs at least one power reduction method based on the at least one indication. In response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels, the network node selectively decreases a PSD of the one or more scheduled channels with low priority among the different priorities.
[0065] Selectively decreasing a PSD of the one or more scheduled channels refers to decreasing, or reducing, or dropping the PSD of the one or more scheduled channel that met a condition, e.g., having a low priority among the different priorities. In this way the SINR of high priority scheduled channel is not impacted by the PSD reduction as the target power reduction can be achieved without reducing the PSD, or clipping, the high priority channels. As an example, scheduled channels in the cell-edge of a communication system may be classified as high priority and thus will not experience the SINR reduction, and consequent reduction of coverage of the communication system.
[0066] Figure 3 illustrates a third embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0067] According to the third embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0068] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0069] As an example of obtaining 1100, the network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0070] The method 1000 further comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. The at least one power reduction method is performed until the target power reduction has been achieved.
[0071] The performing 1200 comprises, in response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels: selectively decreasing 1210 a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities.
[0072] In an example, a scheduled channel with low priority excludes at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a physical downlink control channel (PDDCH) ; a physical reference signal.
[0073] In another example, the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.
[0074] In another example, the priority threshold is obtained by the network node. As another example, a scheduled channel has a high priority when comprising at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a PDDCH; a physical reference signal.
[0075] The selectively decreasing 1210 a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities comprises selectively decreasing 1211 the PSD of the one or more scheduled channels with low priority to zero, in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction.
[0076] The network node performs at least one power reduction method based on the at least one indication. In response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels and in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction, the network node selectively decreases a PSD of the one or more scheduled channels with low priority among the different priorities to zero.
[0077] The method 1000 comprises updating 1220 the target power reduction by subtracting an accumulative decreased power of the one or more scheduled channels with low priority, from the target power reduction.
[0078] The performing 1200 comprises, in response to the target power reduction being not achieved and, a minimum SINR, being equal or larger than a SINR threshold, or, in response to the target power reduction being not achieved and, a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type: clipping 1230 a peak of transmission power of the one or more scheduled channels. The clipping 1230 is performed until the target power reduction has been achieved.
[0079] The minimum SINR refers to a lowest value SINR among SINRs of the one or more scheduled channels.
[0080] In response to the target power reduction being not achieved, and a minimum SINR being equal or larger than a SINR threshold, the network node clips a peak of transmission power of the one or more scheduled channels. The clipping is performed until the target power reduction has been achieved.
[0081] In response to the target power reduction being not achieved, and a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type, the network node clips a peak of transmission power of the one or more physical channels. The clipping is performed until the target power reduction has been achieved.
[0082] In an example, the SINR threshold is based on the target power reduction and / or obtained by the network node.
[0083] An SINR threshold refers to an SINR value of a scheduled channel that is required for a communication system to maintain a certain level of performance, or quality, after a PSD decreasing is performed. If the SINR of a scheduled channel falls below this threshold, a PSD reduction would most likely render the quality of the scheduled channel too poor.
[0084] As an example, the SINR threshold may be obtained from the following formula: SINRthreshold=SINRcall_drop+PSD reduction target+Margin
[0085] SINRcall_drop, refers a SINR value below which, a scheduled channel would most likely fail.
[0086] PSD reduction target refers to the updated target power reduction.
[0087] Margin refers to an arbitrary value that may be used to represent scheduled channels affecting phenoms.
[0088] In another example, a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold and, a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.
[0089] In another example, one or more scheduled channels are one or more scheduled channels with non-zero power.
[0090] In another example, the one or more scheduled channels are one or more scheduled physical channels.
[0091] As another example, a scheduled channels may have four modulation types, QPSK, 16-QAM, 64-QAM, 256-QAM, the modulation threshold may be between the 16-QAM and the 64-QAM modulation types. According to the example, the QPSK and the 16-QAM are lower order modulation types and the 64-QAM and 256-QAM are higher order modulation types.
[0092] As another example, a scheduled channels may have three modulation types, QPSK, 16-QAM, 64-QAM, and the modulation threshold may be between the 16-QAM and the 64-QAM modulation types. According to the example, the QPSK and the 16-QAM are lower order modulation types and the 64-QAM is a higher order modulation type.
[0093] As another example, a scheduled channels may have three modulation types, QPSK, 16-QAM, 64-QAM, and the modulation threshold may be between the QPSK and the 16-QAM modulation types. According to the example, the QPSK is a lower order modulation type and the 16-QAM and 64-QAM are higher order modulation types.
[0094] As another example, one or more scheduled channels are one or more scheduled channels with non-zero power.
[0095] As another example, the one or more scheduled channels are one or more scheduled physical channels.
[0096] Figure 4 illustrates a fourth embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0097] According to the fourth embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0098] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, SINR of one or more scheduled channels.
[0099] As an example of obtaining 1100, the network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0100] The method 1000 comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. The at least one power reduction method is performed until the target power reduction has been achieved.
[0101] The performing 1200 comprises, in response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels: selectively decreasing 1210 a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities.
[0102] The selectively decreasing 1210 a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities comprises selectively decreasing 1211 the PSD of the one or more scheduled channels with low priority to zero, in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction.
[0103] The network node performs at least one power reduction method based on the at least one indication. In response to the at least one indication indicating that there are at least two different priorities of the one or more scheduled channels and in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction, the network node selectively decreases a PSD of the one or more scheduled channels with low priority among the different priorities to zero.
[0104] The method 1000 comprises updating 1220 the target power reduction by subtracting an accumulative decreased power of the one or more scheduled channels with low priority, from the target power reduction.
[0105] The performing 1200 comprises, in response to the target power reduction being not achieved, and in response to a minimum SINR being smaller than a SINR threshold, and in response to a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type: decreasing 1240 PSD of the one or more scheduled channels.
[0106] The minimum SINR refers to a lowest value SINR among SINRs of the one or more scheduled channels.
[0107] In response to the target power reduction being not achieved, and a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type, the network node decreases PSD of the one or more scheduled channels.
[0108] In an example, the decreasing is performed until the target power reduction has been achieved.
[0109] In another example, a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold and, a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.
[0110] In another example, one or more scheduled channels are one or more scheduled channels with non-zero power.
[0111] In another example, the one or more scheduled channels are one or more scheduled physical channels.
[0112] In another example, a scheduled channel with low priority excludes at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a PDDCH; a physical reference signal.
[0113] In another example, the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.
[0114] In another example, the priority threshold is obtained by the network node.
[0115] Figure 5 illustrates a fifth embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0116] According to the fifth embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0117] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0118] As an example of obtaining 1100, the network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0119] The method 1000 further comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. The at least one power reduction method is performed until the target power reduction has been achieved.
[0120] The performing 1200 comprises, in response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINRs of the one or more scheduled channels, being equal or larger than a SINR threshold, or in response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type: clipping 1230 a peak of transmission power of the one or more physical channels.
[0121] The minimum SINR refers to lowest value SINR among SINRs of the one or more scheduled channels.
[0122] In response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINRs of the one or more scheduled channels, being equal or larger than a SINR threshold, the network node clips a peak of transmission power of the one or more physical channels.
[0123] In response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type, the network node clips a peak of transmission power of the one or more physical channels.
[0124] The clipping is performed until the target power reduction has been achieved.
[0125] In an example, the SINR threshold is based on the target power reduction and / or obtained by the network node.
[0126] In another example, a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold and, a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.
[0127] In another example, one or more scheduled channels are one or more scheduled channels with non-zero power.
[0128] In another example, the one or more scheduled channels are one or more scheduled physical channels.
[0129] In another example, a scheduled channel with low priority excludes at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a PDDCH; a physical reference signal.
[0130] In another example, the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.
[0131] In another example, the priority threshold is obtained by the network node.
[0132] Figure 6 illustrates a sixth embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0133] According to the sixth embodiment, a method 1000 for handling power overshooting of one or more scheduled channels is presented. The method 1000 is performed by a network node.
[0134] The method 1000 comprises obtaining 1100 at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0135] As an example of obtaining 1100, the network node obtains, procures, receives, monitors at least one indication related to a target power reduction. The at least one indication further relates to at least one of: priority of one or more scheduled channels, modulation type and physical resource block, PRB, usage of one or more scheduled channels, signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels.
[0136] The method 1000 further comprises performing 1200 at least one power reduction method, the at least one power reduction method being based on the at least one indication. The at least one power reduction method is performed until the target power reduction has been achieved.
[0137] The performing 1200 comprises, in response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINR of the one or more scheduled channels with non-zero power, being smaller than a SINR threshold, and in response to a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type: decreasing 1240 PSD of the one or more scheduled channels.
[0138] The minimum SINR refers to a lowest value SINR among SINRs of the one or more scheduled channels.
[0139] In response to the at least one first indication indicating that there is no differentiation of the priorities for the one or more scheduled channels, and in response to a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type, the network node decreases the PSD of the one or more scheduled channels.
[0140] As an example, the decreasing is performed until the target power reduction has been achieved. In another example, a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold and, a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.
[0141] As another example, one or more scheduled channels are one or more scheduled channels with non-zero power.
[0142] As another example, the one or more scheduled channels are one or more scheduled physical channels.
[0143] As another example, a scheduled channel with low priority excludes at least one of the following: a scheduled channel for retransmission; a latency-sensitive scheduled channel; a PDDCH; a physical reference signal.
[0144] As another example, the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.
[0145] As another example, the priority threshold is obtained by the network node.
[0146] Figure 7 illustrates a seventh embodiment of the method 1000 for handling power overshooting of one or more scheduled channels.
[0147] According to the seventh embodiment, a network node identifies 702 the occurring of a power overshooting in one or more scheduled channels. In response to identifying 702 the occurring of a power overshooting, the network node obtains 704 an indication related to a target power reduction to avoid the power overshooting.
[0148] If the one or more scheduled channels are of different priorities, i.e., there is a mixture of high and low priority channels (706) , and the total power of the low priority channels is equal or larger than the target power reduction (708) , the power spectral density (PSD) of the low priority channels is reduced until the target power reduction is achieved (710) .
[0149] If the one or more scheduled channels are of different priorities, i.e., there is a mixture of high and low priority channels (706) , and the total power of the low priority channels is smaller than the target power reduction (708) , the PSD of the low priority channels is reduced to zero, i.e., the transmission of low priority channels is abandoned (712) . The network node determines an updated target power reduction by removing the power of the abandoned low priority channels from the original target power reduction.
[0150] If the target power reduction is not met, e.g., the updated target power reduction is not zero, or if the one or more scheduled channels have no difference in priorities, e.g. have the same priority or all of the scheduled channels have high priority, the network node obtains the minimum SINR of the scheduled channels. If the minimum SINR is smaller than a SINR threshold, which is obtained by the network node, the network node uses a clipping algorithm on the scheduled channels to achieve the target power reduction (720) . If the minimum SINR is equal or larger than the SINR threshold and the PRBs of the scheduled channels have a low modulation order (722) , the network node will reduce the PSD of the scheduled channels to achieve the target power reduction (724) . If the minimum SINR is equal or larger than the SINR threshold and the PRBs of the scheduled channels don’t have a low modulation order (722) , the network node uses a clipping algorithm on the scheduled channels to achieve the target power reduction (720) .
[0151] Figure 8 illustrates an example of a communication system 200 in accordance with some embodiments.
[0152] In the example, the communication system 200 includes a telecommunication network 210 that includes an access network 220, such as a radio access network (RAN) , and a core network 230, which includes one or more core network nodes 232. The access network 220 includes one or more access network nodes, such as network nodes 100A and 100B (one or more of which may be generally referred to as network nodes 100) , or any other similar 3rd Generation Partnership Project (3GPP) access nodes or non-3GPP access points. Moreover, as will be appreciated by those of skill in the art, a network node is not necessarily limited to an implementation in which a radio portion and a baseband portion are supplied and integrated by a single vendor. Thus, it will be understood that network nodes include disaggregated implementations or portions thereof. For example, in some embodiments, the telecommunication network 210 includes one or more Open-RAN (ORAN) network nodes. An ORAN network node is a node in the telecommunication network 210 that supports an ORAN specification (e.g., a specification published by the O-RAN Alliance, or any similar organization) and may operate alone or together with other nodes to implement one or more functionalities of any node in the telecommunication network 210, including one or more network nodes 100 and / or core network nodes 232.
[0153] Examples of an ORAN network node include an open radio unit (O-RU) , an open distributed unit (O-DU) , an open central unit (O-CU) , including an O-CU control plane (O-CU-CP) or an O-CU user plane (O-CU-UP) , a RAN intelligent controller (near-real time or non-real time) hosting software or software plug-ins, such as a near-real time control application (e.g., xApp) or a non-real time control application (e.g., rApp) , or any combination thereof (the adjective “open” designating support of an ORAN specification) . The network node may support a specification by, for example, supporting an interface defined by the ORAN specification, such as an A1, F1, W1, E1, E2, X2, Xn interface, an open fronthaul user plane interface, or an open fronthaul management plane interface. Moreover, an ORAN access node may be a logical node in a physical node. Furthermore, an ORAN network node may be implemented in a virtualization environment (described further below) in which one or more network functions are virtualized. For example, the virtualization environment may include an O-Cloud computing platform orchestrated by a Service Management and Orchestration Framework via an O-2 interface defined by the O-RAN Alliance or comparable technologies. The network nodes 100 facilitate direct or indirect connection of user equipment (UE) , such as by connecting UEs 240A, 240B, 240C, and 240B (one or more of which may be generally referred to as UEs 240) to the core network 230 over one or more wireless connections.
[0154] Example wireless communications over a wireless connection include transmitting and / or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and / or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors. Moreover, in different embodiments, the communication system 200 may include any number of wired or wireless networks, network nodes, UEs, and / or any other components or systems that may facilitate or participate in the communication of data and / or signals whether via wired or wireless connections. The communication system 200 may include and / or interface with any type of communication, telecommunication, data, cellular, radio network, and / or other similar type of system.
[0155] The UEs 240 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and / or operable to communicate wirelessly with the network nodes 100 and other communication devices. Similarly, the network nodes 100 are arranged, capable, configured, and / or operable to communicate directly or indirectly with the UEs 240 and / or with other network nodes or equipment in the telecommunication network 210 to enable and / or provide network access, such as wireless network access, and / or to perform other functions, such as administration in the telecommunication network 210.
[0156] In the depicted example, the core network 230 connects the network nodes 100 to one or more host computing systems, such as host 250. These connections may be direct or indirect via one or more intermediary networks or devices. In other examples, network nodes may be directly coupled to hosts. The core network 230 includes one or more core network nodes (e.g., core network node 232) that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and / or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node 232. Example core network nodes include functions of one or more of a Mobile Switching Center (MSC) , Mobility Management Entity (MME) , Home Subscriber Server (HSS) , Access and Mobility Management Function (AMF) , Session Management Function (SMF) , Authentication Server Function (AUSF) , Subscription Identifier De-concealing function (SIDF) , Unified Data Management (UDM) , Security Edge Protection Proxy (SEPP) , Network Exposure Function (NEF) , and / or a User Plane Function (UPF) .
[0157] The host 250 may be under the ownership or control of a service provider other than an operator or provider of the access network 220 and / or the telecommunication network 210. The host 250 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio / video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server.
[0158] As a whole, the communication system 200 of Figure 8 enables connectivity between the UEs, network nodes, and hosts. In that sense, the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM) ; Universal Mobile Telecommunications System (UMTS) ; Long Term Evolution (LTE) , and / or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G) ; wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi) ; and / or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax) , Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, and / or any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox.
[0159] In some examples, the telecommunication network 210 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network 210 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network 210. For example, the telecommunications network 210 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and / or Massive Machine Type Communication (mMTC) / Massive IoT services to yet further UEs.
[0160] In some examples, the UEs 240 are configured to transmit and / or receive information without direct human interaction. For instance, a UE may be designed to transmit information to the access network 220 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the access network 220. Additionally, a UE may be configured for operating in single-or multi-RAT or multi-standard mode. For example, a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e. being configured for multi-radio dual connectivity (MR-DC) , such as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) New Radio –Dual Connectivity (EN-DC) .
[0161] In the example, the hub 260 communicates with the access network 220 to facilitate indirect communication between one or more UEs (e.g., UE 240C and / or 240D) and network nodes (e.g., network node 100B) . In some examples, the hub 260 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs. For example, the hub 260 may be a broadband router enabling access to the core network 230 for the UEs. As another example, the hub 260 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes 100, or by executable code, script, process, or other instructions in the hub 260. As another example, the hub 260 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data. As another example, the hub 260 may be a content source. For example, for a UE that is a VR device, display, loudspeaker, or other media delivery device, the hub 260 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub 260 then provides to the UE either directly, after performing local processing, and / or after adding additional local content. In still another example, the hub 260 acts as a proxy server or orchestrator for the UEs, in particular if one or more of the UEs are low energy IoT devices.
[0162] The hub 260 may have a constant / persistent or intermittent connection to the network node 100B. The hub 260 may also allow for a different communication scheme and / or schedule between the hub 260 and UEs (e.g., UE 240C and / or 240D) , and between the hub 260 and the core network 230. In other examples, the hub 260 is connected to the core network 230 and / or one or more UEs via a wired connection. Moreover, the hub 260 may be configured to connect to an M2M service provider over the access network 220 and / or to another UE over a direct connection. In some scenarios, UEs may establish a wireless connection with the network nodes 100 while still connected via the hub 260 via a wired or wireless connection. In some embodiments, the hub 260 may be a dedicated hub –that is, a hub whose primary function is to route communications to / from the UEs from / to the network node 100B. In other embodiments, the hub 260 may be a non-dedicated hub –that is, a device which is capable of operating to route communications between the UEs and network node 100B, but which is additionally capable of operating as a communication start and / or end point for certain data channels.
[0163] Figure 9 illustrates a network node 100 in accordance with some embodiments.
[0164] As used herein, network node refers to equipment capable, configured, arranged and / or operable to communicate directly or indirectly with a UE and / or with other network nodes or equipment, in a telecommunication network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points) , base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs) ) , O-RAN nodes or components of an O-RAN node (e.g., O-RU, O-DU, O-CU) .
[0165] Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and so, depending on the provided amount of coverage, may be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units, distributed units (e.g., in an O-RAN access node) and / or remote radio units (RRUs) , sometimes referred to as Remote Radio Heads (RRHs) . Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS) . Other examples of network nodes include multiple transmission point (multi-TRP) 5G access nodes, multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs) , base transceiver stations (BTSs) , transmission points, transmission nodes, multi-cell / multicast coordination entities (MCEs) , Operation and Maintenance (O&M) nodes, Operations Support System (OSS) nodes, Self-Organizing Network (SON) nodes, positioning nodes (e.g., Evolved Serving Mobile Location Centers (E-SMLCs) ) , and / or Minimization of Drive Tests (MDTs) .
[0166] The network node 100 includes a processing circuitry 110, a memory 120, a communication interface 130, and a power source 140. The network node 100 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc. ) , which may each have their own respective components. In certain scenarios in which the network node 100 comprises multiple separate components (e.g., BTS and BSC components) , one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeBs. In such a scenario, each unique NodeB and RNC pair, may in some instances be considered a single separate network node. In some embodiments, the network node 100 may be configured to support multiple radio access technologies (RATs) . In such embodiments, some components may be duplicated (e.g., separate memory 120 for different RATs) and some components may be reused (e.g., a same antenna 150 may be shared by different RATs) . The network node 100 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node 100, for example GSM, WCDMA, LTE, NR, WiFi, Zigbee, Z-wave, LoRaWAN, Radio Frequency Identification (RFID) or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node 100.
[0167] The processing circuitry 110 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and / or encoded logic operable to provide, either alone or in conjunction with other network node 100 components, such as the memory 120, to provide network node 100 functionality.
[0168] In some embodiments, the processing circuitry 110 includes a system on a chip (SOC) . In some embodiments, the processing circuitry 110 includes one or more of radio frequency (RF) transceiver circuitry 112 and baseband processing circuitry 114. In some embodiments, the radio frequency (RF) transceiver circuitry 112 and the baseband processing circuitry 114 may be on separate chips (or sets of chips) , boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry 112 and baseband processing circuitry 114 may be on the same chip or set of chips, boards, or units.
[0169] The memory 120 may comprise any form of volatile or non-volatile computer-readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM) , read-only memory (ROM) , mass storage media (for example, a hard disk) , removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD) ) , and / or any other volatile or non-volatile, non-transitory device-readable and / or computer-executable memory devices that store information, data, and / or instructions that may be used by the processing circuitry 110. The memory 120 may store any suitable instructions, data, or information, including a computer program, software, an application including one or more of logic, rules, code, tables, and / or other instructions capable of being executed by the processing circuitry 110 and utilized by the network node 100. The memory 120 may be used to store any calculations made by the processing circuitry 110 and / or any data received via the communication interface 130. In some embodiments, the processing circuitry 110 and memory 120 is integrated.
[0170] The communication interface 130 is used in wired or wireless communication of signaling and / or data between a network node, access network, and / or UE. As illustrated, the communication interface 130 comprises port (s) / terminal (s) 132 to send and receive data, for example to and from a network over a wired connection. The communication interface 130 also includes radio front-end circuitry 134 that may be coupled to, or in certain embodiments a part of, the antenna 150. Radio front-end circuitry 134 comprises filters 136 and amplifiers 138. The radio front-end circuitry 134 may be connected to an antenna 150 and processing circuitry 110. The radio front-end circuitry may be configured to condition signals communicated between antenna 150 and processing circuitry 110. The radio front-end circuitry 134 may receive digital data that is to be sent out to other network nodes or UEs via a wireless connection. The radio front-end circuitry 134 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 136 and / or amplifiers 138. The radio signal may then be transmitted via the antenna 150. Similarly, when receiving data, the antenna 150 may collect radio signals which are then converted into digital data by the radio front-end circuitry 134. The digital data may be passed to the processing circuitry 110. In other embodiments, the communication interface may comprise different components and / or different combinations of components.
[0171] In certain alternative embodiments, the network node 100 does not include separate radio front-end circuitry 134, instead, the processing circuitry 110 includes radio front-end circuitry and is connected to the antenna 150. Similarly, in some embodiments, all, or some of the RF transceiver circuitry 112 is part of the communication interface 130. In still other embodiments, the communication interface 130 includes one or more ports or terminals 132, the radio front-end circuitry 134, and the RF transceiver circuitry 112, as part of a radio unit (not shown) , and the communication interface 130 communicates with the baseband processing circuitry 114, which is part of a digital unit (not shown) .
[0172] The antenna 150 may include one or more antennas, or antenna arrays, configured to send and / or receive wireless signals. The antenna 150 may be coupled to the radio front-end circuitry 134 and may be any type of antenna capable of transmitting and receiving data and / or signals wirelessly. In certain embodiments, the antenna 150 is separate from the network node 100 and connectable to the network node 100 through an interface or port.
[0173] The antenna 150, communication interface 130, and / or the processing circuitry 110 may be configured to perform any receiving operations and / or certain obtaining operations described herein as being performed by the network node. Any information, data and / or signals may be received from a UE, another network node and / or any other network equipment. Similarly, the antenna 150, the communication interface 130, and / or the processing circuitry 110 may be configured to perform any transmitting operations described herein as being performed by the network node. Any information, data and / or signals may be transmitted to a UE, another network node and / or any other network equipment.
[0174] The power source 140 provides power to the various components of network node 100 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component) . The power source 140 may further comprise, or be coupled to, power management circuitry to supply the components of the network node 100 with power for performing the functionality described herein. For example, the network node 100 may be connectable to an external power source (e.g., the power grid, an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry of the power source 140. As a further example, the power source 140 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry. The battery may provide backup power should the external power source fail.
[0175] Embodiments of the network node 100 may include additional components beyond those shown in Figure 10 for providing certain aspects of the network node’s functionality, including any of the functionality described herein and / or any functionality necessary to support the subject matter described herein. For example, the network node 100 may include user interface equipment to allow input of information into the network node 100 and to allow output of information from the network node 100. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for the network node 100. In some embodiments providing a core network node, such as core network node 108 of FIG. 8, some components, such as the radio front-end circuitry 134 and the RF transceiver circuitry 112 may be omitted.
[0176] Figure 10 is a block diagram illustrating a virtualization environment 400 in which functions implemented by some embodiments may be virtualized.
[0177] In the present context, virtualizing means creating virtual versions of apparatuses or devices which may include virtualizing hardware platforms, storage devices and networking resources. As used herein, virtualization can be applied to any device described herein, or components thereof, and relates to an implementation in which at least a portion of the functionality is implemented as one or more virtual components. Some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines (VMs) implemented in one or more virtual environments 400 hosted by one or more of hardware nodes, such as a hardware computing device that operates as a network node, UE, core network node, or host. Further, in embodiments in which the virtual node does not require radio connectivity (e.g., a core network node or host) , then the node may be entirely virtualized. In some embodiments, the virtualization environment 400 includes components defined by the O-RAN Alliance, such as an O-Cloud environment orchestrated by a Service Management and Orchestration Framework via an O-2 interface. Virtualization may facilitate distributed implementations of a network node, UE, core network node, or host.
[0178] Applications 410 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc. ) are run in the virtualization environment 400 to implement some of the features, functions, and / or benefits of some of the embodiments disclosed herein.
[0179] Hardware 420 includes processing circuitry, memory that stores software and / or instructions executable by hardware processing circuitry, and / or other hardware devices as described herein, such as a network interface, input / output interface, and so forth. Software may be executed by the processing circuitry to instantiate one or more virtualization layers 430 (also referred to as hypervisors or virtual machine monitors (VMMs) ) , provide VMs 440A and 440B (one or more of which may be generally referred to as VMs 440) , and / or perform any of the functions, features and / or benefits described in relation with some embodiments described herein. The virtualization layer 430 may present a virtual operating platform that appears like networking hardware to the VMs 440.
[0180] The VMs 440 comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer 430. Different embodiments of the instance of a virtual appliance 410 may be implemented on one or more of VMs 440, and the implementations may be made in different ways. Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV) . NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment.
[0181] In the context of NFV, a VM 440 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of the VMs 440, and that part of hardware 420 that executes that VM, be it hardware dedicated to that VM and / or hardware shared by that VM with others of the VMs, forms separate virtual network elements. Still in the context of NFV, a virtual network function is responsible for handling specific network functions that run in one or more VMs 440 on top of the hardware 420 and corresponds to the application 410.
[0182] Hardware 420 may be implemented in a standalone network node with generic or specific components. Hardware 420 may implement some functions via virtualization. Alternatively, hardware 420 may be part of a larger cluster of hardware (e.g. such as in a data center or CPE) where many hardware nodes work together and are managed via management and orchestration 450, which, among others, oversees lifecycle management of applications 410. In some embodiments, hardware 420 is coupled to one or more radio units that each include one or more transmitters and one or more receivers that may be coupled to one or more antennas. Radio units may communicate directly with other hardware nodes via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station. In some embodiments, some signaling can be provided with the use of a control system 460 which may alternatively be used for communication between hardware nodes and radio units.
[0183] Figure 11 illustrates a computer program product 500 in accordance with some embodiments. The computer program product 500 comprises a computer-readable medium 510. The computer readable medium comprises instructions 512 that, when executed by processing circuitry or by a network node, cause the processing circuitry or the network node to carry out a method according to some of the previous embodiments.
[0184] The computer program product 500 may comprise a carrier containing instructions 512 that, when executed by processing circuitry or by a network node, cause the processing circuitry or the network node to carry out a method according to some of the previous embodiments.
[0185] The carrier may be any one of an electronic signal, an optical signal, an electromagnetic signal, an electrical signal, a radio signal, a microwave signal, or a computer-readable storage medium 512. A computer program comprises instructions 512 that, when executed by processing circuitry or by a network node, cause the processing circuitry or the network node to carry out a method according to some of the previous embodiments.
[0186] Although the computing devices described herein (e.g., UEs, network nodes) may include the illustrated combination of hardware components, other embodiments may comprise computing devices with different combinations of components. It is to be understood that these computing devices may comprise any suitable combination of hardware and / or software needed to perform the tasks, features, functions, and methods disclosed herein. Determining, calculating, obtaining or similar operations described herein may be performed by processing circuitry, which may process information by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and / or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination. Moreover, while components are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, computing devices may comprise multiple different physical components that make up a single illustrated component, and functionality may be partitioned between separate components. For example, a communication interface may be configured to include any of the components described herein, and / or the functionality of the components may be partitioned between the processing circuitry and the communication interface. In another example, non-computationally intensive functions of any of such components may be implemented in software or firmware and computationally intensive functions may be implemented in hardware.
[0187] In certain embodiments, some or all of the functionality described herein may be provided by processing circuitry executing instructions stored on in memory, which in certain embodiments may be a computer program product in the form of a non-transitory computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by the processing circuitry without executing instructions stored on a separate or discrete device-readable storage medium, such as in a hard-wired manner. In any of those particular embodiments, whether executing instructions stored on a non-transitory computer-readable storage medium or not, the processing circuitry can be configured to perform the described functionality. The benefits provided by such functionality are not limited to the processing circuitry alone or to other components of the computing device, but are enjoyed by the computing device as a whole, and / or by end users and a wireless network generally.
Claims
1.A method (1000) for handling power overshooting of one or more scheduled channels performed by a network node (100) , the method comprising:obtaining (1100) at least one indication (10) related to a target power reduction and wherein the at least one indication further relates to at least one of:priority of one or more scheduled channels,modulation type and physical resource block, PRB, usage of one or more scheduled channels,signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels;performing (1200) at least one power reduction method, the at least one power reduction method being based on the at least one indication (10) .2.The method (1000) of claim 1, wherein the at least one power reduction method is performed until the target power reduction has been achieved.3.The method (1000) of any of the claims 1 or 2, wherein performing (1200) the at least one power reduction method, comprises:in response to the at least one indication (10) indicating that there are at least two different priorities of the one or more scheduled channels, selectively decreasing (1210) a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities.4.The method (1000) of claim 3, wherein the selectively decreasing (1210) a power spectrum density, PSD, of the one or more scheduled channels with low priority among the different priorities, comprises selectively decreasing (1211) the PSD of the one or more scheduled channels with low priority to zero, in response to a cumulative power of the one or more scheduled channels with low priority being smaller than the target power reduction.5.The method (1000) of claim 3 or 4, comprising: updating (1220) the target power reduction by subtracting an accumulative decreased power of the one or more scheduled channels with low priority, from the target power reduction.6.The method (1000) of any of the claims 1 to 5, wherein performing (1200) the at least one power reduction method, comprises:in response to the target power reduction being not achieved or in response to the at least one first indication (10) indicating that there is no differentiation of the priorities for the one or more scheduled channels:in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINRs of the one or more scheduled channels, being equal or larger than a SINR threshold, or in response to a number of PRBs having higher order modulation type being equal or smaller than a number of PRBs having lower order modulation type:clipping (1230) a peak of transmission power of the one or more physical channels.7.The method (1000) of claim 6, wherein clipping (1230) is performed until the target power reduction has been achieved.8.The method (1000) of any of the claims 1 to 5, wherein performing (1200) the at least one power reduction method, comprises:in response to the target power reduction being not achieved or in response to the at least one first indication (10) indicating that there is no differentiation of the priorities for the one or more scheduled channels:in response to a minimum SINR, the minimum SINR being a lowest value SINR among SINR of the one or more scheduled channels with non-zero power, being smaller than a SINR threshold:in response to a number of PRBs having higher order modulation type being larger than a number of PRBs having lower order modulation type:decreasing (1240) PSD of the one or more scheduled channels.9.The method (1000) of claim 8, wherein the decreasing (1240) is performed until the target power reduction has been achieved.10.The method (1000) of any of the claims 6 to 9, wherein the SINR threshold is based on the target power reduction, and / or obtained by the network node (100) .11.The method (1000) of any of the claims 6 to 10, wherein:a PRB has a higher order modulation type if the modulation type of the PRB is above or equal to a modulation threshold;a PRB has a lower order modulation type if the modulation type of the PRB is below the modulation threshold.12.The method (1000) of any of the claims 1 to 11, wherein the one or more scheduled channels are one or more scheduled channels with non-zero power.13.The method (1000) of any of the claims 1 to 12, wherein the one or more scheduled channels are one or more scheduled physical channels.14.The method (1000) of any of the claims 3 to 13, wherein a scheduled channel with low priority excludes at least one of the following:a scheduled channel for retransmission;a latency-sensitive scheduled channel;a physical downlink control channel, PDDCH;a physical reference signal.15.The method (1000) of any of the claim 1 to 14, wherein the at least one indication indicates more than two different priorities of the one or more scheduled channels, if a priority of a scheduled channel is below a priority threshold, the scheduled channel is a scheduled channel with low priority.16.The method (1000) of claim 15, wherein the priority threshold is obtained by the network node (100) .17.A network node (100) for handling power overshooting of one or more scheduled channels comprising processing circuitry (110) and a memory (120) , the network node (110) configured to:obtain (1100) at least one indication (10) related to a target power reduction and wherein the at least one indication further relates to at least one of:priority of one or more scheduled channels,modulation type and physical resource block, PRB, usage of one or more scheduled channels,signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels;perform (1200) at least one power reduction method, the at least one power reduction method being based on the at least one indication (10) .18.The network node (100) of claim 17, adapted to perform the method of any of claims 2 to 16.19.A network node (100) , adapted to perform the method of any of claims 1 to 16.20.A computer program, comprising instructions (512) that, when executed by processing circuitry (110) , cause the processing circuitry to carry out the method according to any of claims 1 to 16.21.A computer program product (500) , comprising a computer-readable medium (510) , comprising instructions (512) that, when executed by processing circuitry (110) , cause the processing circuitry to carry out the method according to any of claims 1 to 16.22.A tangible, non-transient computer-readable medium comprising instructions that, when executed by processing circuitry (110) , cause the network node to perform operations comprising:obtaining (1100) at least one indication (10) related to a target power reduction and wherein the at least one indication further relates to at least one of:priority of one or more scheduled channels,modulation type and physical resource block, PRB, usage of one or more scheduled channels,signal-to-interference-plus-noise ratio, SINR, of one or more scheduled channels;performing (1200) at least one power reduction method, the at least one power reduction method being based on the at least one indication (10) .
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