CN113630858B

CN113630858B - Power management reporting

Info

Publication number: CN113630858B
Application number: CN202110497236.0A
Authority: CN
Inventors: T·恩托南; S·图尔蒂南; 吴春丽; S·阿科拉
Original assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Current assignee: Nokia Shanghai Bell Co Ltd; Nokia Solutions and Networks Oy
Priority date: 2020-05-08
Filing date: 2021-05-07
Publication date: 2023-12-01
Anticipated expiration: 2041-05-07
Also published as: CN113630858A; WO2021223246A1

Abstract

Example embodiments of the present disclosure relate to power management reports, and apparatus, methods, devices, and computer-readable storage media for enhancing reports for power reduction. The method comprises the following steps: determining, at the first device, a reporting scheme for at least one of the serving cells of the first device based on at least one parameter related to power reduction if a need for reporting the power reduction to be applied to the at least one of the serving cells is determined; and transmitting a power management report to the second device based on the reporting scheme, the power management report containing information about the power reduction. In this way, the terminal device may report output power reduction to the network device in a timely and reliable manner, and the power reduction report may be transmitted based on different reporting schemes depending on the power reduction level. In this way, radio link failure can be avoided and transmission of the terminal device can be improved.

Description

Power management reporting

Technical Field

Embodiments of the present disclosure relate generally to the field of telecommunications and, more particularly, relate to an apparatus, method, device, and computer-readable storage medium for reporting power reduction.

Background

As the number of online services has grown dramatically year by year, bandwidth cravings have been endless. Millimeter wave (mmW) spectrum offers the possibility to use most of the continuous bandwidth to address high throughput applications. Thus, the 5 th generation (5G) New Radio (NR) spectrum ranges far beyond the previous 4 th generation (4G) spectrum, which ranges from 400MHz to 6GHz, a well known frequency range 1 (FR 1). In millimeter wave 5G NR, the frequency range 2 (FR 2) includes frequencies between 24GHz and 52.6GHz, and the expansion of NR operation into the range of 52.6 to 114GHz is currently being discussed. However, operating with high gain antennas at such high frequencies has raised concerns about user health.

There is a standard regarding millimeter wave system that specifies and prescribes maximum power for User Equipment (UE). Since frequencies below 100GHz are non-ionized, health concerns are limited to heating body tissue heat while it absorbs electromagnetic millimeter wave energy. Millimeter wave frequencies produce penetration depths below 1mm, and thus possible thermal damage is limited to the skin surface and eyes. Most of the energy is absorbed within the first 0.4mm of the human skin at 42 GHz.

Disclosure of Invention

In general, example embodiments of the present disclosure provide solutions for reporting output power reduction.

In a first aspect, a first device is provided. The first device includes: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to at least: determining a reporting scheme for at least one of the serving cells of the first device based on at least one parameter related to power reduction if a need for reporting the power reduction to be applied to the at least one serving cell is determined; and transmitting a power management report to the second device based on the reporting scheme, the power management report containing information about the power reduction.

In a second aspect, a second device is provided. The second device includes: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to at least: receiving a power management report from the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and controlling transmission on the second serving cell of the first device based on the information.

In a third aspect, a method is provided. The method comprises the following steps: determining, at the first device, a reporting scheme for at least one of the serving cells for which reporting is to be applied, based on at least one parameter related to power reduction, if a need for the power reduction is determined for the at least one serving cell; and transmitting a power management report to the second device based on the reporting scheme, the power management report containing information about the power reduction.

In a fourth aspect, a method is provided. The method comprises the following steps: receiving, at the second device, a power management report from the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and controlling transmission on the second serving cell of the first device based on the information.

In a fifth aspect, there is provided an apparatus comprising: means for determining a reporting scheme for at least one of the serving cells of the first device based on at least one parameter related to power reduction if it is determined a need for reporting power reduction to be applied to the at least one serving cell; and means for transmitting a power management report containing information about the power reduction to the second device based on the reporting scheme.

In a sixth aspect, there is provided an apparatus comprising: means for receiving a power management report from the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and means for controlling transmissions on the second serving cell of the first device based on the information.

In a seventh aspect, there is provided a computer readable medium having stored thereon a computer program which, when executed by at least one processor of a device, causes the device to perform the method according to the third aspect.

In an eighth aspect, there is provided a computer readable medium having stored thereon a computer program which, when executed by at least one processor of a device, causes the device to perform a method according to the fourth aspect.

Other features and advantages of embodiments of the present disclosure will be apparent from the following description of the particular embodiments, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the embodiments of the disclosure.

Drawings

Embodiments of the present disclosure are presented below in an exemplary sense with reference to the drawings and their advantages are explained in more detail, wherein

FIG. 1 illustrates an example environment in which example embodiments of the present disclosure may be implemented;

fig. 2 illustrates a maximum allowed EIRP, depending on a separation distance between a terminal device and a user, according to some example embodiments of the present disclosure;

fig. 3 illustrates a signaling diagram for reporting power reduction, according to some example embodiments of the present disclosure;

FIG. 4 illustrates a flowchart of an example method for reporting power reduction, according to some example embodiments of the present disclosure;

fig. 5 shows a signaling diagram illustrating a process for reporting output power reduction according to some example embodiments of the present disclosure;

fig. 6 shows a signaling diagram illustrating a process for reporting output power reduction according to some example embodiments of the present disclosure;

FIG. 7 illustrates a flowchart of an example method for reporting power reduction, according to some example embodiments of the present disclosure;

FIG. 8 illustrates a simplified block diagram of a device suitable for implementing exemplary embodiments of the present disclosure; and

fig. 9 illustrates a block diagram of an example computer-readable medium, according to some embodiments of the disclosure.

The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements.

Detailed Description

Principles of the present disclosure will now be described with reference to some example embodiments. It should be understood that these embodiments are described for illustrative purposes only and to assist those skilled in the art in understanding and practicing the present disclosure without implying any limitation on the scope of the present disclosure. The disclosure described herein may be implemented in various ways other than those described below.

In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

In this disclosure, references to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an example embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It will be understood that, although the terms "first" and "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish between functions of the various elements. As used herein, the term "and/or" includes any and all combinations of one or more of the listed terms.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used herein, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

As used in this disclosure, the term "circuit" may refer to one or more or all of the following:

(a) Hardware-only circuit implementations (such as in analog-only and/or digital-circuit implementations) and

(b) A combination of hardware circuitry and software, such as (as applicable):

(i) Combination of analog and/or digital hardware circuit(s) and software/firmware

(ii) Any portion of the hardware processor(s) with software, including the digital signal processor(s), software and memory(s), working together to cause a device such as a mobile phone or server to perform various functions) and

(c) Hardware circuit(s) and/or processor(s) such as microprocessor(s) or a portion of microprocessor(s) that require software (e.g., firmware) to operate, but software may not exist when software is not required to operate.

This definition of circuit applies to all uses of this term in this application, including in any claims. As another example, as used in this disclosure, the term circuitry also encompasses hardware-only circuitry or processor (or processors) or a portion of hardware circuitry or processor and its (or their) accompanying software and/or firmware implementations. The term circuitry also encompasses, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit or server for a mobile device, a cellular network device, or a similar integrated circuit in another computing or network device.

As used herein, the term "communication network" refers to a network that conforms to any suitable communication standard, such as a fifth generation (5G) system, long Term Evolution (LTE), LTE-advanced (LTE-a), wideband Code Division Multiple Access (WCDMA), high Speed Packet Access (HSPA), narrowband internet of things (NB-IoT), and so forth. Furthermore, the communication between the terminal device and the network devices in the communication network may be performed according to any suitable generation communication protocol including, but not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, future fifth generation (5G) New Radio (NR) communication protocols and/or any other protocol currently known or to be developed in the future. Embodiments of the present disclosure may be applied to various communication systems. In view of the rapid development of the communication field, there will of course be future types of communication technologies and systems that can be used to implement the present disclosure. It should not be taken as limiting the scope of the present disclosure to only the foregoing systems.

As used herein, the term "network device" refers to a node in a communication network via which a terminal device accesses the network and receives services therefrom. Depending on the terminology and technology applied, a network device may refer to a Base Station (BS) or an Access Point (AP), e.g., a node B (NodeB or NB), an evolved NodeB (eNodeB or eNB), an NR next generation NodeB (gNB), a Remote Radio Unit (RRU), a Radio Head (RH), a Remote Radio Head (RRH), a relay, a low power node such as a femto, pico, etc. The network device is allowed to be defined as part of the gNB, such as, for example, in the case of CU/DU separation, the network device is defined as a gNB-CU or gNB-DU.

The term "terminal device" refers to any terminal device capable of wireless communication. By way of example, and not limitation, a terminal device may also be referred to as a communication device, user Equipment (UE), subscriber Station (SS), portable subscriber station, mobile Station (MS), or Access Terminal (AT). The terminal devices may include, but are not limited to, mobile phones, cellular phones, smart phones, voice over IP (VoIP) phones, wireless local loop phones, tablet computers, wearable terminal devices, personal Digital Assistants (PDAs), portable computers, desktop computers, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback devices, in-vehicle wireless terminal devices, wireless endpoints, mobile stations, laptop embedded devices (LEEs), laptop mounted devices (LMEs), USB dongles, smart devices, wireless Customer Premises Equipment (CPE), internet of things (IoT) devices, watches or other wearable devices, head Mounted Displays (HMDs), vehicles, drones, medical devices and applications (e.g., tele-surgery), industrial devices and applications (e.g., robots and/or other wireless devices operating in an industrial and/or automated processing chain environment), consumer electronic devices, devices operating on commercial and/or industrial wireless networks, and the like. The terminal device may also correspond to a Mobile Terminal (MT) part of an Integrated Access and Backhaul (IAB) node (also known as a relay node). In the following description, the terms "terminal device", "communication device", "terminal", "user equipment" and "UE" may be used interchangeably.

Although the functionality described herein may be performed in fixed and/or wireless network nodes in various example embodiments, in other example embodiments, the functionality may be implemented in a user equipment device (such as a cellular phone or tablet or laptop or desktop or mobile IoT device or fixed IoT device). For example, the user equipment device may be equipped with the respective capabilities described in connection with the fixed and/or wireless network node(s), where appropriate. The user equipment device may be a user equipment and/or a control device such as a chipset or processor configured to control the user equipment when installed in the user equipment. Examples of such functions include a bootstrapping server function and/or a home subscriber server, which from the point of view of these functions/nodes may be implemented in a user equipment device by providing the user equipment device with software configured to cause the user equipment device to execute.

As described above, in the wireless communication network, there are two frequency ranges, i.e., a frequency range 1 (FR 1) from 400MHz to 6GHz and a frequency range 2 (FR 2) from 24GHz to 114 GHz. For serving cells operating at relatively high frequencies (e.g., at FR2 and above), they require high gain antennas to maintain the link budget. However, high gain antennas direct a significant amount of energy that may be brought to the user. Current government exposure guidelines are used to prevent health problems caused by thermal effects. For frequencies below 6GHz (e.g., LTE), specific absorption rate (Specific Absorption Rate, SAR) has been used to determine exposure thresholds. SAR levels measure the energy absorbed by the human body when exposed to electromagnetic fields. According to the Federal Communications Commission (FCC) in the united states, SAR limits to 1g of 1.6W/kg on average on tissue, whereas in europe SAR limits to 10g of 2W/kg on average on tissue. 1g averaging provides finer resolution for human energy absorption studies. Even 1g of tissue is actually a considerable volume under millimeter wave mechanisms with penetration depths less than 1 mm. It is difficult to define meaningful volumes for SAR evaluation, and it is currently generally accepted to use Power Density (PD) instead of SAR to set exposure limits at millimeter wave frequencies. Thus, it is a planar energy distribution, not a volumetric energy distribution.

To protect user health, the Maximum Permissible Exposure (MPE) specification specifies MPE thresholds and the end devices must always adhere to MPE. Thus, if the user is close to the antenna or the user is exposed to the radiation beam, the terminal device must reduce its output power. The allowable maximum EIRP of the terminal device is related to the separation distance between the terminal device and the user's body. The Maximum Permissible Exposure (MPE) is a regulation for PD for the millimeter wave regime. The FCC and International non-ionizing radiation protection Commission (ICNIRP) have set thresholds for MPE of 10W/m2 (1 mW/cm 2) for the public, between 6GHz or 10GHz and 100GHz, respectively. The energy absorbed by the human body increases as a function of the distance to the terminal device. Thus, in order to meet MPE constraints, the terminal device may have to reduce its output power if the user is close to the antenna. Fig. 2 shows the allowed maximum EIRP according to the separation distance between the terminal device and the user. As shown in fig. 2, when the user almost touches the antenna, the peak EIRP is allowed to decrease by more than 20dBm for PC3 UE.

On the other hand, the decrease in maximum allowed EIRP greatly affects the range of the UE, degrading the signal quality (e.g., CQI, RSRP, RSRQ, etc.) received from the serving cell 130. It is alarming that a significant decrease in output power (at least 20dB for PC3 users) may result in losing the connection with the base station (gNB) and that Radio Link Failure (RLF) will eventually trigger RLF at the UE or network side, but will typically take more than 1 second, since the UE hardly successfully sends any information to the network via the link. Currently, the terminal device may trigger a power management maximum power reduction (P-MPR) event and send a report based on the reporting procedure of the Power Headroom Report (PHR), but only including an indication to apply the P-MPR and not reporting the exact P-MPR value to the network. However, the required power reduction may be too high to maintain the current link, or the power reduction may be applied before the network knows about the power reduction event. Thus, if signals are transmitted using a link requiring a P-MPR application, signals from the terminal device including reports may not reach the network device. Even in some cases, power reduction events may reach the network device, which may only be transmitted in a delayed manner. This is because only PHR events do not trigger buffer status request reporting at the UE and therefore do not trigger scheduling requests for reporting events. In this case, the report cannot be reported until a data transmission occurs at the terminal device. After transmitting the report, the terminal device may still disconnect from the network due to the reduced power.

Accordingly, embodiments of the present invention propose a method for fast reporting of power reduction events occurring at a terminal device. The power reduction report may be in the form of a power management maximum power reduction (P-MPR) report in existing signaling or in entirely new signaling. When the power reduction event is triggered, the terminal device may select a reporting scheme based on at least one of the power reduction level, the configuration parameters of the terminal device, and the network conditions, and transmit a power management report including information about the power reduction event to the network device based on the reporting scheme. In this way, the terminal device may report output power reduction to the network in a timely and reliable manner, which in turn may assist the terminal device in scheduling transmissions on different serving cells. In this way, radio link failure can be avoided and transmission of the terminal device can be improved.

Fig. 1 illustrates an example communication network 100 in which embodiments of the present disclosure may be implemented. As shown in fig. 1, communication network 100 includes terminal devices 110-1 and 110-2 (collectively referred to as first devices 110, or also referred to as first devices 110-1 and 110-2). The communication network 100 also includes second devices 120-1 and 120-2 (which may also be collectively referred to below as second device 120 or second device 120-1 and third device 120-2, respectively). The first device 110 may communicate with the second device 120. For example, the first device 110 may be served by at least one of the serving cells 130-1 through 130-4 (collectively serving cells 130) managed by the second device 120. The second device 120-1 and the second device 120-2 may communicate with each other.

In a carrier aggregation scenario, the first device 110 may be served simultaneously by more than one serving cell, including one primary cell and at least one secondary cell. In this case, the serving cells 130-1 to 130-4 may be controlled by different second devices 120-1 and 120-2, respectively. For example, serving cells 130-1 and 130-2 may be controlled by second device 120-1, while serving cells 130-3 and 130-4 may be controlled by second device 120-2. In a dual connectivity scenario, the serving cells 130-1 and 130-2 may be grouped into a primary cell group (MCG), where the serving cell 130-1 acts as a primary cell, and the serving cells 130-3 and 130-4 may be grouped into a Secondary Cell Group (SCG). In another case, the serving cells 130-1 to 130-4 may operate over a frequency range. For example, the serving cells 130-1 and 130-2 may be FR2 type serving cells, and the serving cells 130-3 and 130-4 may be FR1 type serving cells.

It should also be understood that the number of network devices, terminal devices and serving cells shown in fig. 1 is given for illustration purposes and does not imply any limitation.

Depending on the communication technology, network 100 may be a Code Division Multiple Access (CDMA) network, a Time Division Multiple Access (TDMA) network, a Frequency Division Multiple Access (FDMA) network, an Orthogonal Frequency Division Multiple Access (OFDMA) network, a single carrier frequency division multiple access (SC-FDMA) network, or any other network. The communications discussed in network 100 may conform to any suitable standard including, but not limited to, new radio access (NR), long Term Evolution (LTE), LTE-evolution, LTE-advanced (LTE-A), wideband Code Division Multiple Access (WCDMA), code Division Multiple Access (CDMA), CDMA2000, global System for Mobile communications (GSM), and the like. Furthermore, the communication may be performed according to any generation communication protocol currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols. The techniques described herein may be used for the wireless networks and radio technologies described above and other wireless networks and radio technologies. For clarity, certain aspects of the technology are described below for LTE, and LTE terminology is used in much of the description below.

In the network 100, the first device 110 and the second device 120 may communicate with each other via beams transmitted along unobstructed paths. For example, the first device 110-1 may communicate with the second device 120-2 via a beam transmitted via a line-of-sight (LOS) path, and in this case, the peak of the effective omni-directional radiated power (EIRP) of the first device 110 is approximately +34dBm. In some cases, the user's body of the first device 110 may be exposed to the radiation beam. For example, the user of the first device 110-2 blocks the path of the beam transmitted to the second device 120 and the user's body is exposed to the beam of radiation.

The principles and implementations of the present disclosure will be described in detail below with reference to fig. 3 through 7. Fig. 3 illustrates a signaling diagram of a process for reporting power reduction according to some example embodiments of the present disclosure. For discussion purposes, the process 300 will be described with reference to FIG. 1. The process 300 may involve the first device 110 and the second device 120.

As described above in connection with fig. 1 and 2, in the event that the first device 110 is required to reduce its output power, the first device 110 may trigger a power reduction event, including immediately reducing the output power or about to reduce the output power. Depending on the level of power reduction of the output power, the first device 110 determines 310 that there is a need to report the power reduction to the second device 120. In some embodiments, the first device may determine a value Δp of the power reduction and compare the value Δp to a preconfigured threshold (e.g., a first threshold P ₁ ) Comparison. For example, a first threshold value P ₁ May be configured by the second device 120. If the value DeltaP exceeds the first threshold value P ₁ The first device 110 may determine that the power reduction event may cause degradation of the transmit power on the serving cell 130 of the first device 110 and that there is a power reduction event to the second device120 report the need for power reduction.

To transmit the power management report, the first device 110 determines 320 a reporting scheme based on at least one parameter related to power reduction. In some embodiments, the reporting scheme may be determined based on a random access procedure or a scheduling request procedure, which will be discussed in detail below. The first device 110 transmits 330 a power management report to the second device 120 based on the reporting scheme. Upon receiving the power management report from the first device 110, the second device 120 obtains information included in the report. The information relates to power reduction to be applied to at least one of the serving cells 130. The second device 120 then controls 340 transmissions on the serving cell 130 of the first device 110 based on the information.

Fig. 4 illustrates a flowchart of an example method for reporting power reduction according to some example embodiments of the present disclosure. The method 400 may be implemented at a terminal device, such as the first device 110 described with reference to fig. 1.

At 410, if the first device 110 determines that there is a need for a power reduction to be applied to the at least one serving cell 130 for the report, the first device 110 determines a reporting scheme for the at least one serving cell based on at least one parameter related to the power reduction.

As described above, the first device 110 may determine whether the reporting scheme is based on a random access procedure or a scheduling request procedure according to one or more parameters. For a serving cell 130 managed by the second device 120, if the power reduction level (such as the value of the power reduction) of the first device 110 exceeds a threshold level of power reduction associated with the serving cell 130, the transmit power on the respective serving cell may degrade, resulting in a radio link failure.

In some embodiments, the parameters used in 410 to determine the reporting scheme may include a value Δp of the power reduction of the first device 110. The first device 110 may compare the value Δp with a threshold (e.g., a second threshold P) for triggering a random access procedure ₂ ) Comparison. Second threshold value P ₂ Above a first threshold P ₁ . If the value DeltaP exceeds the second threshold value P ₂ The first device 110 determining that the reporting scheme is based on a random access procedure. If the value DeltaP does not exceed the second threshold value P ₂ The first device 110 determines that the reporting scheme is based on the scheduling request procedure.

In some embodiments, the parameter may indicate a power reduction level (e.g., a small amount or several dB) associated with the serving cells 130-1 through 130-4 of the first device 110. The first device 110 may determine that power reduction is to be applied to all serving cells 130-1 through 130-4. In this case, the first device 110 may determine the reporting scheme based on the random access procedure, as the transmit power requirement of the random access procedure may be lower than or less stringent than the scheduling request procedure. In another case, the first device 110 may associate the respective power reduction levels associated with the respective serving cells 130-1 through 130-4 with a first threshold level (e.g., L ₁ ) Comparison. If the first device 110 determines that all of the serving cells 130-1 through 13-4 are above the first threshold level L ₁ Is associated with a corresponding power reduction level of the first device 110, the reporting scheme is determined based on a random access procedure.

In some embodiments, the parameters used to determine the reporting scheme in 410 may include a power reduction level (e.g., a small amount or a few dB) associated with the serving cell 130. As described above, power management maximum power reduction can be performed mainly on FR2 type serving cells because of their high operating frequency. The first device 110 may determine to transmit a power reduction report on the FR1 type serving cell 130. Alternatively, the first device 110 may determine to transmit power reduction reports on the FR2 type serving cells 130 if the power reduction levels associated with those FR2 type serving cells do not exceed a threshold level. For example, the serving cell 130-2 is preconfigured to perform a scheduling request procedure between the first device 110 and the second device 120-1, and power reduction is to be applied to the serving cell 130-2. In this case, if the first device 110 determines that the power reduction level of the serving cell 130-2 does not exceed the second threshold level L ₂ The first device 110 may determine that the transmit power on the serving cell 130-2 may not be degraded due to the power reduction and may thus successfully performA row scheduling request procedure. The first device 110 may then determine a reporting scheme based on the scheduling request procedure.

The first device 110 may prioritize and select a beam to transmit for performing a random access procedure and another beam to transmit for performing a scheduling request procedure. If power reduction is not performed on the beam sent to the serving cell 130, or alternatively, if the direction of the beam is not affected by the power reduction, the transmit power on the corresponding serving cell 130 may not be degraded by the power reduction.

In some embodiments, the parameters used to determine the reporting scheme in 410 may indicate the beam selected for performing the random access procedure, e.g., an index of the first beam prioritized by the first device 110. The first device 110 may determine to perform a power reduction on the first beam or, alternatively, the power reduction level of the first beam is too large to report a power reduction event. For example, the first device 110 may determine a power reduction level (e.g., a small amount or several dB) of the first beam and compare it to a first predetermined threshold level P _1’ Comparison. If the power reduction level does not exceed the first predetermined threshold level P _1’ The first device 110 determines that the first beam is preferred for performing the random access procedure and may also be used to report power reduction events. Alternatively, the first device 110 may determine whether the direction of the first beam is affected by the power reduction. If the first device 110 determines that the direction of the first beam is not affected by the power reduction, the terminal device 110 may determine a reporting scheme based on a random access procedure.

In some embodiments, the parameters used to determine the reporting scheme in 410 may indicate the beam selected for performing the scheduling request procedure, e.g., an index of the second beam prioritized by the first device 110. The first device 110 may determine to perform a power reduction on the second beam (e.g., a small amount or several dB) or, alternatively, the power reduction level of the second beam is too large to report a power reduction event. For example, the first device 110 may determine and compare the power reduction level of the second beam to a second predetermined threshold level P _2’ Comparison. If the power reduction level does not exceed the second predetermined threshold level P _2’ The first device 110 determines that the second beam is prioritized for performing the scheduling request procedure and may also be used to report a power reduction event. Alternatively, the first device 110 may determine whether the direction of the second beam is affected by the power reduction. If the first device 110 determines that the direction of the second beam is not affected by the power reduction, the first device 110 may determine a reporting scheme based on the scheduling request procedure. First predetermined threshold level P _1’ And a second predetermined threshold level P _2’ May be preconfigured by the second device 120.

In wireless communication, the number of scheduling requests transmitted between the first device 110 and the second device 120 to initiate a scheduling request procedure is limited. In some embodiments, the parameter used to determine the reporting scheme in 410 may indicate the number of scheduling requests transmitted by the first device 110. If the first device 110 determines that the number of scheduling requests being transmitted exceeds the maximum number for transmitting scheduling requests, the first device 110 may not continue to attempt to initiate the scheduling request procedure. In this case, the first device 110 may determine the reporting scheme based on the random access procedure.

The dedicated resources (e.g., dedicated resources on PUCCH) may be preconfigured by the network (such as the second device 120) for performing the power reduction reporting. In some embodiments, the parameters used to determine the reporting scheme in 410 may indicate whether there are dedicated resources available for reporting power reduction. If the first device 110 determines that dedicated resources dedicated to the random access procedure reporting the power reduction are available, the first device 110 may determine a reporting scheme based on the random access procedure. Similarly, if the first device 110 determines that dedicated resources dedicated to the scheduling request procedure for reporting power reduction are available, the first device 110 may determine a reporting scheme based on the scheduling request procedure.

At 420, the first device 110 transmits a power management report containing information about the power reduction to the second device 120 based on the reporting scheme. The information about the power reduction may include a value of the power reduction to be applied. In some embodiments, the power management report may be a power management power reduction (P-MPR) report transmitted via higher layer signaling (e.g., MAC Control Element (CE)). The MAC CE may be a common MAC CE for PHR, or a dedicated or enhanced MAC CE dedicated to P-MPR.

In the event that more than one second device 120 is serving the first device 110, for example, the first device 110-1 is served by both the second devices 120-1 and 120-2, and the transmission between the first device 110-1 and the second device 120-1 is degraded due to the reduced power, the first device 110-1 may transmit a power management report to the second device 120-2 in addition to the report to the second device 120-1. Specifically, the first device 110 may determine that at least one of the serving cells 130 (such as serving cells 130-3 and 130-4) is managed by the second device 120-2 and transmit a power reduction report to the second device 120-2. Although the transmit power on the serving cells 130-3 and 130-4 does not necessarily degrade due to the reduced output power, the second device 120-2 may adjust the transmissions to be scheduled on the serving cells 130-3 and 130-4 accordingly. Knowing the transmit power degradation between the first device 110-1 and the second device 120-1, the second device 120-2 can increase data transmission on the serving cells 130-3 and 130-4, with the uplink being relatively stable on the serving cells 130-3 and 130-4, and the transmit power not degraded due to the power management maximum power reduction.

Fig. 5 illustrates a signaling diagram of a process of reporting output power reduction based on a random access procedure according to some example embodiments of the present disclosure. For discussion purposes, the process 500 will be described with reference to fig. 1. It should be understood that process 500 may include additional acts not shown and/or may omit some acts shown, and the scope of the present disclosure is not limited in this respect. Further, it is to be appreciated that although primarily presented herein as being performed serially, at least a portion of the acts of process 500 may be performed contemporaneously, or in a different order than presented in fig. 5.

Similar to the process 300 shown in fig. 3, in process 500, the first device 110 determines 505 that there is a need to report a power reduction to the second device 120. The first device 110 determines 510 a reporting scheme based on parameters related to power reduction between the first device 110 and the second device 120. In this case, the first device 110 determines a reporting scheme based on the random access procedure. Or alternatively, the random access procedure is predetermined for reporting the power reduction to be applied. The random access procedure may be a contention-based random access (CBRA) or a contention-free random access (CFRA). The present disclosure is not limited in this respect.

The random access procedure may include 2-step random access or 4-step random access. Both types of random access procedures support CBRA and CFRA. In the 4-step random access procedure, the first device 110 may start the RACH procedure by transmitting a Random Access (RA) preamble to the second device 120. The message for transmitting the random access preamble may be referred to as "MSG1". If the second device 120 successfully receives the RA preamble, the network device may respond with a Random Access Response (RAR) containing, for example, an identifier of the detected preamble, a time advance, a temporary cell-radio network temporary identifier (C-RNTI), and an uplink grant to schedule a Physical Uplink Shared Channel (PUSCH) transmission by the first device 110. The message for transmitting the RAR may be referred to as "MSG2". The first device 110 may then transmit the scheduled transmission, which may be referred to as "MSG3", to the network device. If the scheduled transmission is successfully received, the second device 120 may send a contention resolution message to indicate whether there is contention or whether the transmission by the first device 110 was successful, which may be referred to as "MSG4".

In the 2-step random procedure, the number of round trips required for the RACH procedure is reduced from 2 round trips to 1. This is achieved by transmitting both "MSG1" and "MSG3" in a message called "MSGA", and further by combining "MSG2" and "MSG4" into a message called "MSGB". In some embodiments, if the first device 110 determines a reporting scheme based on a 2-step random access procedure, the terminal device transmits a power management report on a preconfigured resource on PUCCH, e.g. in MSG a.

In case the reporting scheme is based on a 4-step random access procedure, the first device 110 transmits 515 the RA preamble to the second device 120, i.e. in MSG 1. In this case, the RA preamble may indicate a power reduction to be applied. For example, the RA preamble may include an indicator for indicating a power reduction of the first device 110, such as a bit in the RA preamble set to indicate a power reduction event occurring at the first device 110. The first device 110 may receive 520 a message, e.g., MSG2, from the second device 120 indicating the resources allocated for transmission.

In this case, the first device 110 may determine when to transmit the RA preamble to request resources for reporting power reduction. In embodiments where the parameter indicates a reduced power value Δp, the first device 110 may compare the reduced power value Δp to a threshold (such as a third threshold P) for triggering a random access preamble ₃ ) Comparison. Third threshold value P ₃ May be above a first threshold P for triggering a power reduction report ₁ . If the first device 110 determines that the value ΔP exceeds the third threshold P ₃ I.e. ΔP>P ₃ The first device 110 may determine that an immediate reporting of the power down event is required so that the random access preamble needs to be transmitted. In other words, the first device 1 determines to transmit the random access preamble to the second device 120 immediately after determining the need for reporting the power reduction. Otherwise, if the first device 110 determines that the value ΔP does not exceed the third threshold P ₃ Delta P.ltoreq.P ₃ The first device 110 determines to transmit a random access preamble to the second device 120 when data to be scheduled is present at the first device 110. The first device 110 may then transmit a power reduction report during the random access procedure.

The indicator included in the RA preamble may indicate that the second device 120 allocates resources on the serving cell 130 on which the transmit power is not degraded due to the power reduction. For example, the second device 120 may select an FR 1 serving cell, serving cell 130-2, for providing resources for transmission knowing a power reduction event that occurs at the first device 110 that may lead to a radio link failure. The first device 110 may transmit 525 a power management report to the second device 120 on the allocated resources, such as in MSG 3. Upon receiving the power management report, the second device 120 may transmit 530 the MSG4 to the first device 110. The second device 120 may control 535 transmissions on the serving cell 130 based on the information.

Fig. 6 illustrates a signaling diagram of a process for reporting output power reduction according to some example embodiments of the present disclosure. For discussion purposes, process 600 will be described with reference to FIG. 1. Process 600 may involve first device 110 and second device 120. It should be understood that process 600 may include additional acts not shown and/or may omit some acts shown, and the scope of the present disclosure is not limited in this respect. Further, it will be appreciated that although presented herein primarily in a sequential execution, at least a portion of the actions of process 600 may be performed concurrently or in a different order than presented in FIG. 6.

Similar to the process 300 shown in fig. 3, in process 600, the first device 110 determines 605 that there is a need to report a power reduction to the second device 120. The first device 110 determines 610 a reporting scheme based on parameters related to the power reduction to be applied. In this case, the first device 110 determines a reporting scheme based on the scheduling request procedure. Or alternatively, the scheduling request procedure is predetermined for reporting the power reduction to be applied.

To obtain resources for performing scheduled transmissions on a Physical Uplink Control Channel (PUCCH), the first device 110 transmits 615 a request for resource allocation to the second device 120. In this case, the request may be, for example, a scheduling request, and optionally, the scheduling request may indicate a power reduction event occurring at the first device 110. The second device 120 may transmit 620 a response indicating the allocated resources for transmission. For example, the second device 120 may transmit an uplink grant to the first device 110. The response may indicate that the second device 120 allocates resources on the serving cell 130 on which the transmit power is not degraded due to the power reduction. For example, the second device 120 may select an FR 1 serving cell, serving cell 130-2, for providing resources for transmission knowing a power reduction event that occurs at the first device 110 that may lead to a radio link failure. Upon receiving the response, the first device 110 may transmit 625 a power management report to the second device 120 on the allocated resources. The second device 120 may control 630 transmissions on the serving cell 130 based on the information.

In some embodiments, the first device 110 may transmit a request for allocation of resources for power management reporting immediately after determining the need for reporting power reduction. Alternatively, in other embodiments, when data transmission is to be scheduled between the first device 110 and the second device 120, the first device 110 may transmit a request for allocation of resources for power management reporting.

To determine when to transmit a scheduling request for resources allocated for reporting power reduction, the first device 110 may compare the value Δp of the power reduction of the first device 110 with a threshold (e.g., a fourth threshold P ₄ ) Comparison. In this case, the fourth threshold value P ₄ May be above a first threshold P for triggering a power reduction report ₁ . If the first device 110 determines that the value ΔP exceeds the fourth threshold P ₄ I.e. ΔP>P ₄ The first device 110 may determine that the power down event needs to be reported immediately so that the scheduling request needs to be transmitted. In other words, the first device 110 determines the transmission scheduling request as a request for resource allocation immediately after determining the need for reporting power reduction. Otherwise, if the first device 110 determines that the value ΔP does not exceed the fourth threshold P ₄ Delta P.ltoreq.P ₄ The first device 110 determines to transmit a scheduling request to the second device 120 when data to be scheduled is present at the first device 110.

Fig. 7 illustrates a flowchart of an example method for reporting power reduction according to some example embodiments of the present disclosure. The method 700 may be implemented at a network device, such as the second device 120 described with reference to fig. 1.

At 710, the second device 120 receives a power management report from the first device 110. The power management report may contain information about power reduction to be applied to at least one of the serving cells 130-1 to 130-4.

At 720, the second device 120 controls transmission on the serving cell 130 of the first device 110 based on the information. The serving cell 130 may be managed by the second device 120-1 or 120-2.

In some embodiments, the second device 120 may obtain the reduced power value Δp from this information and selectively obtain the cell identifier of the serving cell 130 on which the transmit power was degraded due to the reduced power. The second device 120 may then determine whether the transmit power on at least one of its serving cells 130-1 and 130-2 is degraded due to power reduction based on the value Δp and the FR type of the serving cell 130.

For example, the second device 120 may compare the value Δp to a threshold of a respective power reduction associated with the serving cells 130-1 and 130-2, and if the value Δp exceeds the threshold, the respective serving cell 130 may be determined to be affected by the power reduction, e.g., a transmit power degradation on the serving cell 130. As another example, with the value Δp, the second device 120 may directly determine that the transmission on the serving cell 130-1 is degraded, while the transmission on the serving cell 130-2 is not affected by the power reduction, because the serving cell 130-1 is of the FR 1 type and the serving cell 130-2 is of the FR 2 type.

In some embodiments, the second device 120 may receive the power management report during a random access procedure or a scheduling request procedure with the first device 110. In the case of the 2-step random access procedure, the second device 120 may receive a power management report (i.e., MSGA) together with the random access preamble. In the case of the 4-step random access procedure, the second device 120 may receive a random access preamble from the first device 110 in the MSG1, and the random access preamble may include an indicator indicating a power reduction of the first device 110. The second device 120 may transmit a message, e.g., MSG2, to the first device 110 indicating the resources allocated for the transmission to be scheduled between the first device 110 and the second device 120. The second device 120 may then receive the power management report in MSG3 on the allocated resources.

In some embodiments, the second device 120 may receive the power management report during the scheduling request procedure. The second device 120 may receive a scheduling request from the first device 110 and the scheduling request may include an indicator for indicating a power reduction of the first device 110. The second device 120 may transmit a response indicating the allocated resources for transmission between the first device 110 and the second device 120.

In some embodiments, the resources allocated for the transmission between the first device 110 and the second device 120 are determined taking into account the power reduction. For example, the second device 120 may select resources on the serving cell on which the transmit power is not degraded due to the power reduction. The second device 120 may receive the power management report on the allocated resources.

In some embodiments, the second device 120 may release or deactivate the serving cell 130 if the second device 120 determines that the transmit power on the serving cell 130 is degraded due to the power reduction. Alternatively, if the second device 120 determines that the transmit power on the serving cell 130 is degraded due to the power reduction, the second device 120 may reduce the data transmission to be scheduled on the serving cell 130.

In some embodiments, the second device 120 may transmit a power management report to another device serving the first device 110. For example, the second device 120-1 may transmit a power management report to the second device 120-2 to enable the second device 120-2 to control transmissions on the serving cells 130-3 and 130-4.

In some example embodiments, an apparatus (e.g., first device 110) capable of performing method 400 may include means for performing the various steps of method 400. These components may be implemented in any suitable form. For example, these components may be implemented in circuits or software modules. The apparatus may be implemented as the first device 110 or included in the first device 110. In some embodiments, these components may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause execution of the apparatus.

In some example embodiments, the apparatus includes: means for determining a reporting scheme for at least one of the serving cells of the first device based on at least one parameter related to power reduction if it is determined a need for reporting power reduction to be applied to the at least one serving cell; and means for transmitting a power management report to the second device based on the reporting scheme, the power management report containing information about the power reduction.

In some example embodiments, the apparatus further comprises: means for determining a value of power reduction; means for comparing the value with a first threshold value, the first threshold value being used to trigger reporting of power reduction; and means for determining that there is a need for reporting a power reduction to be applied to the at least one service area if the value is determined to exceed the first threshold.

In some example embodiments, the apparatus further comprises: means for transmitting a power management report to a third device if it is determined that at least one of the serving cells of the first device is managed by the third device that is different from the second device.

In some example embodiments, the parameter is indicative of at least one of: a value of power reduction; a power reduction level associated with at least one of the serving cells of the first device; selecting, by a first device, a first beam for performing a random access procedure; selecting, by the first device, a second beam for performing a scheduling request procedure; the number of scheduling requests transmitted by the first device; and dedicated resources that may be used to report power reduction.

In some example embodiments, the parameter is indicative of a value of power reduction, and the means for determining the reporting scheme based on the at least one parameter comprises: means for comparing the value with a second threshold, the second threshold being used to trigger a random access procedure, the second threshold being higher than the first threshold used to trigger a power reduction report; means for determining a reporting scheme based on a random access procedure if it is determined that the value exceeds a second threshold; and means for determining a reporting scheme based on the scheduling request procedure if it is determined that the value does not exceed the second threshold.

In some example embodiments, the parameter indicates a power reduction level associated with at least one of the serving cells of the first device, and the means for determining the reporting scheme based on the parameter comprises: means for determining that power reduction is to be applied to all serving cells of the first device; means for comparing a power reduction level associated with a respective serving cell of the first device with a first threshold level; and means for determining a reporting scheme based on the random access procedure if it is determined that all serving cells of the first device are associated with respective power reduction levels exceeding a first threshold level.

In some example embodiments, the parameter indicates a first beam selected for performing a random access procedure, and the means for determining the reporting scheme based on the parameter comprises: means for determining a power reduction level of the first beam; and means for determining a reporting scheme based on the random access procedure if it is determined that the power reduction level does not exceed the first predetermined threshold level.

In some example embodiments, the at least one parameter is indicative of a value of power reduction, and the means for determining the reporting scheme based on the at least one parameter comprises: means for comparing the value with a third threshold, the third threshold being for triggering a random access preamble for initiating a random access procedure, the third threshold being higher than the first threshold for triggering reporting of power reduction; means for determining to transmit the random access preamble to the second device immediately after determining the need for reporting power reduction if the value is determined to exceed the third threshold; means for determining to transmit the random access preamble to the second device when the data to be scheduled occurs at the first device if it is determined that the value does not exceed the third threshold.

In some example embodiments, the means for transmitting the power management report comprises: means for transmitting a power management report during the random processing.

In some example embodiments, the random access procedure is a 4-step random access procedure, and the means for transmitting the power management report comprises: means for transmitting a random access preamble to a second device; means for receiving a message from the second device indicating resources allocated for transmission; and means for transmitting the power management report to the second device on the allocated resources.

In some example embodiments, the random access preamble indicates a power reduction of the first device and the second device is caused to allocate resources on a serving cell of the first device on which the transmit power is not degraded due to the power reduction.

In some example embodiments, the random access procedure is a 2-step random access procedure, and the means for transmitting the power management report comprises: means for transmitting a power management report on the preconfigured resources.

In some example embodiments, the parameter indicates a power reduction level associated with at least one of the serving cells of the first device, the at least one of the serving cells including the first serving cell managed by the second device, and the scheduling request procedure between the first device and the second device is performed on the first serving cell, and the means for determining the reporting scheme based on the parameter comprises: means for determining a reporting scheme based on the scheduling request procedure if it is determined that the power reduction level of the first serving cell does not exceed the second threshold level.

In some example embodiments, the parameter indicates a second beam selected for performing the scheduling request procedure, and the means for determining the reporting scheme based on the parameter comprises: means for determining a power reduction level of the second beam; and means for determining a reporting scheme based on the scheduling request procedure if it is determined that the power reduction level does not exceed the second predetermined threshold level.

In some example embodiments, the means for transmitting the power management report according to a reporting scheme determined based on a scheduling request procedure comprises: means for transmitting a scheduling request for resource allocation to the second device; means for receiving a response from the second device indicating the allocated resources for transmission; and means for transmitting the power management report to the second device on the allocated resources.

In some example embodiments, the scheduling request indicates a power reduction of the first device, and the means for receiving the response comprises: means for receiving a response from the second device, the response indicating that the transmit power thereon is not degraded by the power reduction of the allocated resources on the serving cell of the first device.

In some example embodiments, the at least one parameter is indicative of a value of power reduction, and the means for determining the reporting scheme based on the at least one parameter comprises: means for comparing the value with a fourth threshold, the fourth threshold being for triggering a scheduling request for initiating a scheduling request procedure, the fourth threshold being higher than the first threshold for triggering a power reduction report; means for determining to transmit a scheduling request for resource allocation to the second device immediately after determining to report the need to reduce power if the value is determined to exceed the fourth threshold; and means for determining to transmit a scheduling request for resource allocation to the second device if it is determined that the value does not exceed the fourth threshold value when data to be scheduled occurs at the first device.

In some example embodiments, the means for transmitting the power management report comprises: means for transmitting a power management report during a scheduling request procedure.

In some example embodiments, the parameter indicates a number of scheduling requests transmitted by the first device, the scheduling requests are configured to initiate a scheduling request procedure between the first device and the second device, and the means for determining the reporting scheme based on the parameter comprises: means for determining a reporting scheme based on a random access procedure if it is determined that the number of scheduling requests transmitted by the first device exceeds a maximum number for transmitting scheduling requests.

In some example embodiments, the parameter indicates a dedicated resource available for reporting power reduction, and the dedicated resource is preconfigured by the second device, and the means for determining the reporting scheme based on the at least one parameter comprises: means for determining a reporting scheme based on the random access procedure if it is determined that dedicated resources for the random access procedure are available for reporting the power reduction.

In some example embodiments, the parameter indicates a dedicated resource available for reporting power reduction, and the dedicated resource is preconfigured by the second device, and the means for determining the reporting scheme based on the at least one parameter comprises: means for determining a reporting scheme based on the scheduling request procedure if it is determined that dedicated resources for the scheduling request procedure are available for reporting the power reduction.

In some example embodiments, the means for transmitting a power management report containing information about power reduction comprises: means for transmitting a power management report containing the value of the power reduction.

In some example embodiments, the power reduction to be applied comprises a power management maximum power reduction of the first device, and the power management report comprises a power management maximum power reduction report, and the means for transmitting the power management report comprises: means for transmitting a power management maximum power reduction report via or with a dedicated MAC control element.

In some example embodiments, the first device comprises a terminal device and the second device comprises a network device.

In some example embodiments, an apparatus (e.g., second device 120) capable of performing method 700 may include means for performing the various steps of method 700. These components may be implemented in any suitable form. For example, these components may be implemented in circuits or software modules. In some embodiments, these components may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to, with the at least one processor, cause execution of the apparatus. The apparatus may be implemented as the second device 120 or included in the second device 120.

In some example embodiments, the apparatus includes: means for receiving a power management report from the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and means for controlling transmissions on the second serving cell of the first device based on the information.

In some example embodiments, at least one of the serving cells is managed by the second device or the third device, and the means for controlling the transmission comprises: means for obtaining a reduced power value from the information; and means for controlling transmission on at least one of the serving cells managed by the second device if it is determined based on the value of the power reduction and the type of the serving cell that the transmit power on the at least one serving cell is degraded due to the power reduction.

In some example embodiments, the means for receiving a power management report comprises: means for receiving a power management report during a random access procedure or a scheduling request procedure with a first device.

In some example embodiments, the random access procedure comprises a 2-step random access procedure, and the means for receiving a power management report comprises: means for receiving a power management report on a preconfigured resource.

In some example embodiments, the random access procedure comprises a 4-step random access procedure, and the apparatus further comprises: means for receiving a random access preamble from a first device; and means for transmitting a message to the first device indicating the allocated resources for transmission to be scheduled between the first device and the second device. The means for receiving a power management report comprises: means for receiving a power management report on the allocated resources.

In some example embodiments, the random access preamble indicates a power reduction of the first device, and the means for transmitting a message indicating resources allocated for transmission comprises: means for transmitting a message indicating that the transmit power thereon has not degraded due to the power reduction for resources on a serving cell managed by the second device.

In some example embodiments, the power management report is received during a scheduling request procedure, and the apparatus further comprises: means for receiving a scheduling request from a first device; and means for transmitting, to the first device, a response indicating the allocated resources for transmission between the first device and the second device. The means for receiving a power management report comprises: means for receiving a power management report on the allocated resources.

In some example embodiments, the scheduling request indicates a power reduction of the first device, and the means for transmitting a response indicating the allocated resources for transmission comprises: means for transmitting a message indicating that the transmit power thereon has not degraded due to the power reduction for resources on a serving cell managed by the second device.

In some example embodiments, the means for receiving a power management report comprises: means for receiving a power management report via a dedicated MAC control element or together with a MAC control element for a power headroom report.

In some example embodiments, the means for controlling transmission comprises: means for releasing the second serving cell; and means for disabling the second serving cell.

In some examples, the apparatus further comprises: means for transmitting a power management report to a third device managing at least one of the serving cells of the first device.

In some example embodiments, the third device comprises a network device.

Fig. 8 is a simplified block diagram of a device 800 suitable for implementing embodiments of the present disclosure. Device 800 may be provided to implement communication devices such as first device 110 and second device 120 shown in fig. 1. As shown, device 800 includes one or more processors 810, one or more memories 840 coupled to processor 810, and one or more transmitters and/or receivers (TX/RX) 840 coupled to processor 810.

TX/RX 840 is used for two-way communication. TX/RX 840 has at least one antenna to facilitate communication. The communication interface may represent any interface required to communicate with other network elements.

The processor 810 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock that is synchronized to the master processor.

Memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memory include, but are not limited to, read-only memory (ROM) 824, electrically programmable read-only memory (EPROM), flash memory, a hard disk, a Compact Disk (CD), a Digital Video Disk (DVD), and other magnetic and/or optical storage devices. Examples of volatile memory include, but are not limited to, random Access Memory (RAM) 822 and other volatile memory that will not persist during power failure.

The computer program 830 includes computer-executable instructions that are executed by an associated processor 810. Program 830 may be stored in ROM 820. Processor 810 may perform any suitable actions and processes by loading program 830 into RAM 820.

Embodiments of the present disclosure may be implemented by means of program 830, enabling device 800 to perform any of the processes of the present disclosure discussed with reference to fig. 3-7. Embodiments of the present disclosure may also be implemented in hardware or by a combination of software and hardware.

In some embodiments, program 830 may be tangibly embodied in a computer-readable medium, which may be included in device 800 (such as in memory 820) or other storage device accessible to device 800. Device 800 may load program 830 from a computer readable medium into RAM 822 for execution. The computer readable medium may include any type of tangible, non-volatile memory, such as ROM, EPROM, flash memory, hard disk, CD, DVD, and the like. Fig. 9 shows an example of a computer readable medium 900 in the form of a CD or DVD. The computer readable medium has stored thereon a program 830.

In general, the various embodiments of the disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of the embodiments of the disclosure are illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.

The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, that are executed in a device on a target real or virtual processor to perform the methods 400 and 700 described above with reference to fig. 4 and 7. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functionality of the program modules may be combined or split between program modules as desired. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed device, program modules may be located in both local and remote memory storage media.

Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of this disclosure, computer program code or related data may be carried by any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of carriers include signals, computer readable media, and the like.

The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a computer-readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

Furthermore, although operations are described in a particular order, this should not be construed as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Also, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A first device, comprising:

at least one processor; and

at least one memory storing computer program code;

the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device at least to:

determining, if there is a need for reporting power reduction to be applied to at least one of the serving cells of the first device, whether a reporting scheme for the at least one of the serving cells is based on a random access procedure or a scheduling request procedure based on at least one parameter related to the power reduction; and

transmitting a power management report to a second device during the random access procedure, the power management report containing information about the power reduction, if the reporting scheme is determined to be based on the random access procedure; or alternatively

Transmitting the power management report to the second device during the scheduling request procedure, the power management report including information about the power reduction, if the reporting scheme is determined to be based on the scheduling request procedure.

2. The first device of claim 1, wherein the first device is further caused to:

determining a value of the power reduction;

comparing the value to a first threshold for triggering reporting of the power reduction; and

if it is determined that the value exceeds the first threshold, it is determined that there is the need to be applied to the at least one of the serving cells for reporting the power reduction.

3. The first device of claim 1, wherein the first device is further caused to:

transmitting the power management report to a third device if it is determined that at least one of the serving cells of the first device is managed by the third device that is different from the second device.

4. The first device of claim 1, wherein the at least one parameter is indicative of at least one of:

a value of the power reduction;

a power reduction level associated with the at least one of the serving cells of the first device;

Selecting, by the first device, a first beam for performing the random access procedure;

selecting, by the first device, a second beam for performing the scheduling request procedure;

a number of scheduling requests transmitted by the first device, the scheduling requests configured to initiate the scheduling request procedure; and

dedicated resources that can be used to report the power reduction.

5. The first device of claim 1, wherein the at least one parameter indicates a value of the power reduction, and

wherein the first device is caused to determine whether the reporting scheme is based on the random access procedure or the scheduling request procedure based on the at least one parameter by:

comparing the value with a second threshold for triggering the random access procedure, the second threshold being higher than a first threshold for triggering reporting of the power reduction; and

determining the reporting scheme is based on the random access procedure if the value is determined to exceed the second threshold; or alternatively

If it is determined that the value does not exceed the second threshold, determining the reporting scheme is based on the scheduling request procedure.

6. The first device of claim 1, wherein the at least one parameter indicates a power reduction level associated with the at least one of the serving cells of the first device, and

determining that the power reduction is to be applied to all serving cells of the first device;

comparing a power reduction level associated with a respective serving cell of the first device to a first threshold level; and

the determining of the reporting scheme is based on the random access procedure if it is determined that all serving cells of the first device are associated with corresponding power reduction levels exceeding the first threshold level.

7. The first device of claim 1, wherein the at least one parameter indicates a first beam selected for performing the random access procedure, and

Determining a power reduction level of the first beam; and

if it is determined that the power reduction level does not exceed a first predetermined threshold level, determining the reporting scheme is based on the random access procedure.

8. The first device of claim 1, wherein the at least one parameter indicates a value of the power reduction, and

comparing the value with a third threshold for triggering a random access preamble for initiating the random access procedure, the third threshold being higher than a first threshold for triggering reporting of the power reduction; and

determining to transmit the random access preamble to the second device immediately after determining that there is a need to report the power reduction if the value is determined to exceed the third threshold; or alternatively

And if it is determined that the value does not exceed the third threshold, determining to transmit the random access preamble to the second device when data to be scheduled occurs at the first device.

9. The first device of claim 1, wherein the random access procedure is a 4-step random access procedure, and

wherein the first device is caused to transmit the power management report during the random access procedure by:

transmitting a random access preamble to the second device;

receiving a message from the second device indicating the allocated resources for transmission; and

transmitting the power management report to the second device on the allocated resources.

10. The first device of claim 9, wherein the random access preamble indicates a power reduction of the first device, and the random access preamble causes the second device to allocate resources on a serving cell of the first device on which transmit power is not degraded due to the power reduction.

11. The first device of claim 1, wherein the random access procedure is a 2-step random access procedure, and

the power management report is transmitted on a preconfigured resource.

12. The first device of claim 1, wherein the at least one parameter indicates a power reduction level associated with the at least one of the serving cells of the first device, the at least one of the serving cells including a first serving cell managed by the second device, and the scheduling request procedure between the first device and the second device is performed on the first serving cell, and

if it is determined that the power reduction level of the first serving cell does not exceed a second threshold level, determining the reporting scheme is based on the scheduling request procedure.

13. The first device of claim 1, wherein the at least one parameter indicates a second beam selected for performing the scheduling request procedure, and

Determining a power reduction level of the second beam; and

if it is determined that the power reduction level does not exceed a second predetermined threshold level, determining the reporting scheme is based on the scheduling request procedure.

14. The first device of claim 1, wherein the first device is caused to transmit the power management report during the scheduling request procedure by:

transmitting a scheduling request for resource allocation to the second device;

receiving a response from the second device indicating the allocated resources for transmission; and

15. The first device of claim 14, wherein the scheduling request indicates a power reduction of the first device, and

wherein the first device is caused to receive the response by:

the response is received from the second device, the response indicating the resources allocated on a serving cell of the first device on which transmit power is not degraded due to the power reduction.

16. The first device of claim 1, wherein the at least one parameter indicates a value of the power reduction, and

comparing the value with a fourth threshold for triggering a scheduling request for initiating the scheduling request procedure, the fourth threshold being higher than a first threshold for triggering reporting of the power reduction; and

determining to transmit the scheduling request for resource allocation to the second device immediately after determining that there is a need to report the power reduction if the value is determined to exceed the fourth threshold; or alternatively

If it is determined that the value does not exceed the fourth threshold, determining to transmit the scheduling request for resource allocation to a second device when data to be scheduled occurs at the first device.

17. The first device of claim 1, wherein the at least one parameter indicates a number of scheduling requests transmitted by the first device, the scheduling requests configured to initiate the scheduling request procedure between the first device and the second device, and

If it is determined that the number of scheduling requests transmitted by the first device exceeds a maximum number for transmitting the scheduling requests, determining the reporting scheme is based on the random access procedure.

18. The first device of claim 1, wherein the at least one parameter indicates a dedicated resource available for reporting the power reduction, and the dedicated resource is preconfigured by the second device, and

the determining of the reporting scheme is based on the random access procedure if it is determined that dedicated resources for the random access procedure are available for reporting the power reduction.

19. The first device of claim 1, wherein the at least one parameter indicates a dedicated resource available for reporting the power reduction, and the dedicated resource is preconfigured by the second device, and

If it is determined that dedicated resources for the scheduling request procedure are available for reporting the power reduction, determining the reporting scheme is based on the scheduling request procedure.

20. The first device of claim 1, wherein the first device is caused to transmit the power management report containing information regarding the power reduction by:

the power management report including the value of the power reduction is transmitted.

21. The first device of any of claims 1-20, wherein the first device comprises a terminal device and the second device comprises a network device.

22. A second device, comprising:

at least one processor; and

at least one memory storing computer program code;

the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to at least:

receiving, from a first device, a power management report during a random access procedure or a scheduling request procedure of the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and

Controlling transmissions on a second serving cell of the first device based on the information,

wherein the reporting scheme of the power management report is determined by the first device based on at least one parameter related to the power reduction based on the random access procedure or the scheduling request procedure.

23. The second device of claim 22, wherein the at least one of the serving cells is managed by the second device or a third device, and

wherein the second device is caused to control the transmission by:

obtaining the value of the power reduction from the information; and

if it is determined that the transmit power on at least one of the serving cells is degraded due to the power reduction based on the value of the power reduction and a type of the at least one of the serving cells managed by the second device, controlling transmission on the at least one of the serving cells.

24. The second device of claim 22, wherein the random access procedure comprises a 2-step random access procedure, and

wherein the second device is caused to receive the power management report by:

The power management report is received on a preconfigured resource.

25. The second device of claim 22, wherein the random access procedure comprises a 4-step random access procedure, and

wherein the second device is further caused to:

receiving a random access preamble from the first device; and

transmitting a message to the first device indicating allocated resources for transmission to be scheduled between the first device and the second device, and

wherein the second device is caused to receive the power management report by:

the power management report is received on the allocated resources.

26. The second device of claim 25, wherein the random access preamble indicates the power reduction of the first device, and

wherein the second device is caused to transmit the message indicating the allocated resources for the transmission by:

a message is transmitted indicating resources on a serving cell managed by the second device on which transmit power was not degraded due to the power reduction.

27. The second device of claim 22, wherein the power management report is received during the scheduling request procedure, and

Wherein the second device is further caused to:

receiving a scheduling request from the first device; and

transmitting a response to the first device indicating resources allocated for transmission between the first device and the second device, and

wherein the second device is caused to receive the power management report by:

the power management report is received on the allocated resources.

28. The second device of claim 27, wherein the scheduling request indicates the power reduction of the first device, and

wherein the second device is caused to transmit the response indicating the allocated resources for the transmission by:

the response is transmitted indicating resources on a serving cell managed by the second device on which transmit power was not degraded due to the power reduction.

29. The second device of claim 22, wherein the second device is caused to control the transmission by:

if it is determined that the transmit power on the second serving cell is degraded due to the power reduction, performing at least one of:

releasing the second serving cell; and

And disabling the second serving cell.

30. A second device as claimed in claim 22, wherein the second device is further caused to:

the power management report is transmitted to a third device that manages the at least one of the serving cells of the first device.

31. The second device of any of claims 22 to 30, wherein the first device comprises a terminal device and the second device comprises a network device.

32. The second device of claim 23 or 30, wherein the third device comprises a network device.

33. A method for communication, comprising:

determining, at a first device, a reporting scheme for at least one of the serving cells based on at least one parameter related to power reduction, if there is a need for reporting power reduction to be applied to the at least one of the serving cells of the first device, the reporting scheme being based on a random access procedure or a scheduling request procedure; and

34. The method of claim 33, further comprising:

determining a value of the power reduction;

35. The method of claim 33, further comprising:

transmitting the power management report to a third device different from the second device if it is determined that the at least one of the serving cells of the first device is managed by the third device.

36. The method of claim 33, wherein the at least one parameter is indicative of at least one of:

a value of the power reduction;

the number of scheduling requests transmitted by the first device; and

dedicated resources that can be used to report the power reduction.

37. The method of claim 33, wherein the at least one parameter indicates a value of the power reduction, and

wherein determining whether the reporting scheme is based on the random access procedure or the scheduling request procedure based on the at least one parameter comprises:

38. The method of claim 33, wherein the at least one parameter indicates a power reduction level associated with the at least one of the serving cells of the first device, and

39. The method of claim 33, wherein the at least one parameter indicates a first beam selected for performing the random access procedure, and

determining a power reduction level of the first beam; and

40. The method of claim 33, wherein the at least one parameter indicates a value of the power reduction, and

determining to transmit the random access preamble to the second device immediately after determining that the need exists to report the power reduction if the value is determined to exceed the third threshold; or alternatively

41. The method of claim 33, wherein the random access procedure is a 4-step random access procedure, and

wherein transmitting the power management report during the random access procedure comprises:

transmitting a random access preamble to the second device;

42. The method of claim 41, wherein the random access preamble indicates the power reduction of the first device, and the random access preamble causes the second device to allocate resources on a serving cell of the first device on which transmit power is not degraded due to the power reduction.

43. The method of claim 33, wherein the random access procedure is a 2-step random access procedure, and

the power management report is transmitted on a preconfigured resource.

44. The method of claim 33, wherein the at least one parameter indicates a power reduction level associated with the at least one of the serving cells of the first device, the at least one of the serving cells comprising a first serving cell managed by the second device, and the scheduling request procedure between the first device and the second device is performed on the first serving cell, and

45. The method of claim 33, wherein the at least one parameter indicates a second beam selected for performing the scheduling request procedure, and

determining a power reduction level of the second beam; and

46. The method of claim 33, wherein transmitting the power management report during the scheduling request procedure comprises:

transmitting a scheduling request for resource allocation to the second device;

47. The method of claim 46, wherein the scheduling request indicates the power reduction of the first device, and

wherein receiving the response comprises:

the response is received from the second device indicating the resources allocated on the serving cell of the first device on which transmit power was not degraded by the power reduction.

48. The method of claim 33, wherein the at least one parameter indicates a value of the power reduction, and

comparing the value with a fourth threshold for triggering a scheduling request for initiating the scheduling request procedure, the fourth threshold being higher than a first threshold for triggering the power reduction report; and

determining to transmit the scheduling request for resource allocation to the second device immediately after determining that the need to report the power reduction exists if the value is determined to exceed the fourth threshold; or alternatively

49. The method of claim 33, wherein the at least one parameter indicates a number of scheduling requests transmitted by the first device, the scheduling requests configured to initiate the scheduling request procedure between the first device and the second device, and

if it is determined that the number of the scheduling requests transmitted by the first device exceeds a maximum number for transmitting the scheduling requests, determining the reporting scheme is based on the random access procedure.

50. The method of claim 33, wherein the at least one parameter indicates dedicated resources available for reporting the power reduction, and the dedicated resources are preconfigured by the second device,

51. The method of claim 33, wherein the at least one parameter indicates a dedicated resource available for reporting the power reduction, and the dedicated resource is preconfigured by the second device, and

52. The method of claim 33, wherein transmitting the power management report containing information regarding the power reduction comprises:

53. The method of any of claims 33 to 52, wherein the first device comprises a terminal device and the second device comprises a network device.

54. A method for communication, comprising:

Receiving, at a second device from a first device, a power management report during a random access procedure or a scheduling request procedure of the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and

55. The method of claim 54, wherein the at least one of the serving cells is managed by the second device or a third device, and

wherein controlling the transmission comprises:

obtaining the value of the power reduction from the information; and

56. The method of claim 54, wherein the random access procedure comprises a 2-step random access procedure, and

wherein receiving the power management report comprises:

the power management report is received on a preconfigured resource.

57. The method of claim 54, wherein the random access procedure comprises a 4-step random access procedure, and wherein the method further comprises:

receiving a random access preamble from the first device; and

wherein receiving the power management report comprises:

the power management report is received on the allocated resources.

58. The method of claim 57, wherein the random access preamble indicates the power reduction of the first device, and

wherein transmitting a message indicating resources allocated to the transmission comprises:

a message is transmitted indicating that the transmit power thereon is not degraded by the power reduction by resources on a serving cell managed by the second device.

59. The method of claim 54, wherein the power management report is received during the scheduling request procedure, and

Wherein the method further comprises:

receiving a scheduling request from the first device; and

wherein receiving the power management report comprises:

the power management report is received on the allocated resources.

60. The method of claim 59, wherein the scheduling request indicates the power reduction of the first device, and

wherein transmitting the response indicating the allocated resources for the transmission comprises:

the response is transmitted indicating that the transmit power thereon is not degraded by the power reduction for resources on a serving cell managed by the second device.

61. The method of claim 54, wherein controlling the transmission comprises:

releasing the second serving cell; and

and disabling the second serving cell.

62. The method of claim 54, further comprising:

63. A method as claimed in any of claims 54 to 62, wherein the first device comprises a terminal device and the second device comprises a network device.

64. The method of claim 55 or 62, wherein the third device comprises a network device.

65. A communication apparatus, comprising:

means for determining, if there is a need for reporting power reduction to be applied to at least one of the serving cells of the first device, whether a reporting scheme for the at least one of the serving cells is based on a random access procedure or a scheduling request procedure based on at least one parameter related to the power reduction; and

transmitting a power management report to a second device during the random access procedure, the power management report containing information about the power reduction, if it is determined that the reporting scheme is based on the random access procedure; or alternatively

Means for transmitting the power management report to a second device during the scheduling request procedure, the power management report containing information about the power reduction, if it is determined that the reporting scheme is based on the scheduling request procedure.

66. A communication apparatus, comprising:

means for receiving, from a first device, a power management report during a random access procedure or a scheduling request procedure of the first device, the power management report containing information about power reduction to be applied to at least one of the serving cells of the first device; and

means for controlling transmissions on a second serving cell of the first device based on the information,

67. A non-transitory computer readable medium having stored thereon program instructions for causing an apparatus to perform at least the method of any one of claims 33 to 53.

68. A non-transitory computer readable medium having stored thereon program instructions for causing an apparatus to perform at least the method of any one of claims 54 to 64.