Power control for physical sidelink feedback channel

Abstract

Embodiments of the present disclosure relate to apparatus, methods, and computer readable media for power control for a physical sidelink feedback channel. In the method, an apparatus determines that a power required for a transmission on a physical sidelink feedback channel exceeds a configured power for the apparatus, the power required for the transmission including a first power for a first set of resource blocks and a second power for a second set of resource blocks. The apparatus then performs the transmission on the physical sidelink feedback channel, thereby reducing the first power for the first set of resource blocks based on the configured power. In this way, unnecessary power consumption can be reduced, and unwanted interference can be avoided.

Description

Technical Field

[0001] Various exemplary embodiments disclosed herein relate generally to the telecommunications field, and particularly to methods, apparatus, devices, and computer-readable storage media for power control of physical side link feedback channels. Background Technology

[0002] With the development of communication technology, sidelink (SL) communication has been studied, and various improvements have been proposed. For example, feedback mechanisms associated with SL communication are being investigated to improve performance on unlicensed spectrum in sidelinks. Other aspects, such as power control, also require further research to further enhance the performance of unlicensed spectrum in sidelinks. Summary of the Invention

[0003] In a first aspect of this disclosure, an apparatus is provided. The apparatus includes: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to at least: determine that the power required for a transmission on a physical side link feedback channel exceeds a configured power for the apparatus, the required power including a first power for a first set of resource blocks and a second power for a second set of resource blocks; and perform the transmission on the physical side link feedback channel, wherein the first power for the first set of resource blocks is reduced based on the configured power.

[0004] In a second aspect of this disclosure, a method is provided. The method includes: determining that the power required for transmission on a physical side-link feedback channel exceeds a configured power for the device, the required power including a first power for a first set of resource blocks and a second power for a second set of resource blocks; and performing the transmission on the physical side-link feedback channel, wherein the first power for the first set of resource blocks is reduced based on the configured power.

[0005] In a third aspect of this disclosure, an apparatus is provided. The apparatus includes: means for determining that the power required for transmission on a physical side link feedback channel exceeds a configured power for the apparatus, the power required for transmission including a first power of a first set of resource blocks and a second power of a second set of resource blocks; and means for performing the transmission on the physical side link feedback channel, wherein the first power of the first set of resource blocks is reduced based on the configured power.

[0006] In a fourth aspect of this disclosure, a computer-readable medium is provided. The computer-readable medium includes instructions stored thereon for causing the apparatus to perform at least the method according to the second aspect.

[0007] It should be understood that the "Summary of the Invention" section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0008] Some exemplary embodiments will now be described with reference to the accompanying drawings, in which:

[0009] Figure 1 An example communication environment in which various example embodiments of this disclosure may be implemented is shown;

[0010] Figure 2 An interleaved frequency division multiplexing scheme for the new air interface uplink is shown;

[0011] Figure 3 Examples of power on different RBs are shown;

[0012] Figure 4 An example signaling diagram of physical side link feedback channel (PSFCH) power control according to some example embodiments of this disclosure is shown;

[0013] Figure 5 A flowchart of a process for PSFCH power control according to some example embodiments of the present disclosure is shown;

[0014] Figure 6 A flowchart of another process for PSFCH power control according to some example embodiments of this disclosure is shown;

[0015] Figure 7 A flowchart illustrating further processes for PSFCH power control according to some example embodiments of the present disclosure is shown;

[0016] Figure 8 A simplified block diagram of a device suitable for implementing various example embodiments of the present disclosure is shown; and

[0017] Figure 9 A block diagram of an example computer-readable medium according to some example embodiments of the present disclosure is shown.

[0018] Throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. Detailed Implementation

[0019] The principles of this disclosure will now be described with reference to some exemplary 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 implementing this disclosure, and do not impose any limitation on the scope of this disclosure. The embodiments described herein can be implemented in various ways other than those described below.

[0020] In the following description and claims, unless otherwise defined, 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 pertains.

[0021] In this disclosure, references to "an embodiment," "embodiment," and "example embodiment" indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is believed that in conjunction with other embodiments (whether explicitly described or not) affecting such a feature, structure, or characteristic is within the knowledge of those skilled in the art.

[0022] It should be understood that although terms such as "first" and "second" preceding nouns may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish elements from one another and they do not restrict the order of the nouns. For example, without departing from the scope of the various example embodiments, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0023] As used herein, “at least one of the following: ” and “at least one of ” and similar wording (where the list of two or more elements is connected by “and” or “or”) refers to at least any one element, or at least any two or more elements, or at least all elements.

[0024] As used herein, unless explicitly stated otherwise, performing a “responding to A” step does not mean that the step is performed immediately after “A” occurs, and may include one or more intermediate steps.

[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the various example embodiments. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well. It will be further understood that, when used herein, the terms “comprising,” “including,” “having,” “containing,” and / or “comprising” specify the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0026] As used in this application, the term "circuit" may refer to one or more of the following:

[0027] (a) Hardware-only implementations (such as implementations in analog and / or digital-only circuits) and

[0028] (b) A combination of hardware circuitry and software, such as (if applicable):

[0029] (i) A combination of analog and / or digital hardware circuitry with software / firmware, and

[0030] (ii) Any part of the hardware processor, together with software (including digital signal processors), software and memory, works together to enable a device (such as a mobile phone or server) to perform various functions, and

[0031] (c) Hardware circuitry and / or processors, such as microprocessors or parts thereof, that require software (e.g. firmware) to operate, but may be absent when no software is required for operation.

[0032] This definition of "circuit" applies to all uses of the term in this application, including in any of the claims. As a further example, as used herein, the term "circuit" also covers implementations of hardware circuitry or processors (or processors in general) or a portion thereof and their accompanying software and / or firmware. The term "circuit" also covers, for example and if applicable to a particular claim element, baseband integrated circuits or processor integrated circuits for mobile devices or similar integrated circuits in servers, cellular network devices, or other computing or networking devices.

[0033] As used herein, the term "communication network" refers to a network that conforms to any suitable communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-A Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), Narrowband Internet of Things (NB-IoT), etc. Furthermore, communication between terminal devices and network devices in a communication network can be performed according to any suitable generation of 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, fifth-generation (5G), sixth-generation (6G) communication protocols and / or any other currently known or future-developed protocols. The embodiments of this disclosure can be applied to various communication systems. Given the rapid development of communications, there will naturally be communication technologies and systems that embody future types of this disclosure. This disclosure should not be construed as limiting its scope to the systems described above.

[0034] As used herein, the term "network device" refers to a node in a communication network through which terminal devices access the network and receive services. Depending on the terminology and technology applied, a network device may refer to a base station (BS) or access point (AP), such as a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), an NR NB (also known as a gNB), a Remote Radio Unit (RRU), a Radio Header (RH), a Remote Radio Header (RRH), a repeater, an Integrated Access and Backhaul (IAB) node, low-power nodes such as femtoseconds or picoseconds, non-terrestrial network (NTN) or non-terrestrial network equipment such as satellite network equipment, low Earth orbit (LEO) satellites and geostationary orbit (GEO) satellites, aircraft network equipment, and so on. In some example embodiments, the Radio Access Network (RAN) separation architecture includes a centralized unit (CU) and a distributed unit (DU) at the IAB donor node. The IAB node includes a mobile terminal (IAB-MT) portion that behaves as a UE to the parent node, and the DU portion of the IAB node behaves as a base station to the next-hop IAB node.

[0035] The term "terminal device" refers to any end 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). Terminal devices may include, but are not limited to, mobile phones, cellular phones, smartphones, VoIP phones, wireless local loop phones, tablets, 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 equipment (LEE), laptop-mounted equipment (LME), 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., remote surgery), industrial equipment and application software (e.g., robots and / or other wireless devices operating in industrial and / or automated processing chain environments), consumer electronics devices, and devices operating on commercial and / or industrial wireless networks. Terminal devices may also correspond to the mobile terminal (MT) portion of an IAB node (e.g., a relay node). In the following description, the terms “terminal equipment”, “communication equipment”, “terminal”, “user equipment” and “UE” are used interchangeably.

[0036] As used herein, the terms “resource,” “transmission resource,” “resource block,” “physical resource block (PRB),” “uplink resource,” or “downlink resource” can refer to any resource used to perform communication, such as communication between a terminal device and a network device, including resources in the time domain, frequency domain, spatial domain, code domain, or any other combination of time-domain, frequency-domain, spatial-domain, and code-domain resources capable of communication. In the following, unless explicitly stated otherwise, resources in both the frequency and time domains will be used as examples of transmission resources to describe some exemplary embodiments of this disclosure. It should be noted that the exemplary embodiments of this disclosure are equally applicable to other resources in other domains.

[0037] Figure 1 An example communication environment 100 in which various exemplary embodiments of the present disclosure may be implemented is illustrated. In the communication environment 100, network device 130 has a certain coverage area, which may be referred to as a service area. One or more terminal devices may be located within or outside the service area. As shown, a first device (e.g., terminal device) 110 and a second device (e.g., another terminal device) 120 are located within the service area of ​​network device 130 and can communicate with network device 130. In other words, the first device 110 and the second device 120 are served by network device 130.

[0038] As mentioned above, in Figure 1 In the example embodiment, both the first device 110 and the second device 120 are terminal devices. Different terminal devices 110 can establish communication connections with each other. For example, the first device 110 and the second device 120 can establish communication connections with each other. Communication between the terminal devices 110 can be referred to as sidelink (SL) communication.

[0039] During SL communication, the first device 110 may communicate data and / or control information with the second device 120. In SL communication, the terminal device performing the transmission (also referred to as an SL transmission) is called a transmitting (TX) device (or transmitter), and other terminal devices receiving the transmission are called receiving (RX) devices (or receivers). In some example embodiments, the RX device may provide feedback on the received SL transmission to the TX device. In some example embodiments of this disclosure, the first device 110 may receive the SL transmission from the second device 120 and transmit feedback to the second device 120 on the PSFCH. For the purposes of discussion, in the following example embodiments, the device performing the transmission on the PSFCH may be discussed together with the first device 110, which in some cases is also referred to as a UE.

[0040] It should be understood that Figure 1The number of devices shown and their connections are for illustrative purposes only and do not imply any limitation. Environment 100 may include any suitable number of devices suitable for implementing the various embodiments of this disclosure. Although not shown, it should be understood that one or more additional devices may be located in the service area of ​​network device 130, and one or more additional cells may be deployed in environment 100.

[0041] Communication in communication environment 100 can be implemented according to any suitable communication protocol, including but not limited to cellular communication protocols such as first-generation (1G), second-generation (2G), third-generation (3G), fourth-generation (4G), fifth-generation (5G), and sixth-generation (6G), wireless local area network communication protocols such as IEEE 802.11, and / or any other protocol currently known or to be developed in the future. Furthermore, communication can utilize any suitable wireless communication technology, including but not limited to: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Frequency Division Duplex (FDD), Time Division Duplex (TDD), Multiple-Input Multiple-Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM), and / or any other technology currently known or to be developed in the future.

[0042] Support for both Mode 1 and Mode 2 sidelinks on unlicensed spectrum has been studied in 3GPP, where Mode 1 Uu operations are limited to licensed spectrum. For example, by evaluating the applicability of sidelink resource reservations from 3GPP Release (Rel)-16 / Rel-17 to unlicensed sidelink operations within the boundaries of unlicensed channel access mechanisms and operations, channel access mechanisms from NR-U can be reused for unlicensed sidelink operations. If the existing NR-U channel access framework does not support the required SL-U functionality, appropriate recommendations can be made for approval by the 3GPP TSG RAN plenary meeting.

[0043] The physical channel design framework is also being studied as part of the work within 3GPP. For example, changes are needed to the physical channel structure and procedures of NR sidelinks to operate on unlicensed spectrum. Existing NR sidelink and NR-U channel structures can be reused as baselines.

[0044] In unlicensed frequency bands below 7 GHz, the Listen-Before-Tell (LBT) channel access mechanism ensures the coexistence of 5G New Radio (NR) with other systems such as IEEE 802.11. User equipment (UE) wishing to perform sidelink (SL) transmissions must successfully complete an LBT check before initiating a transmission.

[0045] For a UE to pass the LBT check, it must observe whether the channel is available for multiple consecutive Free Channel Assessment (CCA) slots. In the spectrum below 7 GHz, these slots last for 9 µs. If the measured power (i.e., the energy collected during the CCA slots) is below a regulatory threshold (which can vary depending on the operating band and geographic region), the UE considers the channel available in the CCA slots.

[0046] The NR range in unlicensed spectrum is limited to frequency bands below 7 GHz. For this frequency range, the following spectrum regulatory requirements for UL physical channel design are provided.

[0047] The occupied channel bandwidth (OCB) should be between 80% and 100% of the declared nominal channel bandwidth.

[0048] Occupied channel bandwidth is the bandwidth containing 99% of the signal power.

[0049] During the Channel Occupied Time (COT), the device may temporarily operate with a channel bandwidth occupied of less than 80% of its nominal channel bandwidth and a minimum of 2 MHz.

[0050] Regulation of maximum power spectral density is typically expressed in 1 MHz resolution bandwidth. The maximum power spectral density (PSD) requirement for 5150–5350 MHz is 10 dBm / MHz. Testing the 1 MHz PSD constraint requires 10 kHz resolution, and therefore, the maximum PSD constraint should be met within any occupied 1 MHz bandwidth.

[0051] In addition, these regulations specify the band-specific total maximum transmit power based on the effective isotropic radiated power (EIRP), for example, the EIRP is limited to 23 dBm for 5150–5350 MHz.

[0052] Restrictions on OCB and PSD can affect the design choices of UL channels for NR unlicensed systems, such as Figure 2 The diagram illustrates an interleaved frequency division multiplexing (FDM) scheme. In this interleaved FDM (e.g., UL resource allocation type 2), UL resources can be allocated by interleaving 10 equidistant PRBs. For a 15 kHz subcarrier spacing (SCS), the number of interleavings can be 10, and for a 30 kHz SCS, the number of interleavings can be 5. The same interleaved RB resource allocation principle can also be used for unlicensed sidelinks.

[0053] When the receiver is the intended receiver, HARQ feedback can be transmitted on the PSFCH in response to the reception of PSCCH / PSSCH transmissions. As described above, the required transmit power can be calculated according to the PSFCH power control procedure. However, similar to all transmissions on the n46 (i.e., 5200 MHz), n96 (i.e., 6000 MHz), and n102 (i.e., 6200 MHz) bands, PSFCH transmissions can also comply with OCB and PSD regulations, as described above.

[0054] Various options can influence PSFCH transmission, such as PSFCH transmission with 15kHz and 30kHz SCS. For example, a first option could require each PSFCH transmission to occupy a common interleaving and a dedicated PRB, which addresses the issues that arise with PSFCH when applying interleaved FDM in SL-U to meet OCB and PSD requirements. This technique can use common interleaving with any (virtual) information to meet OCB requirements and transmit HARQ feedback in one or more dedicated RBs.

[0055] The PSFCH is transmitted in response to the reception of a PSCCH / PSSCH transmission (when the receiver is the intended receiver), and therefore it has an associated PSFCH power control procedure. The UE can perform multiple PSFCH transmissions in the same time slot, and each transmission is a narrowband transmission.

[0056] A close examination of PSFCH power control reveals that when the UE operates within network coverage and provides dl-P0-PSFCH, power control is applied to the serving cell and is based on the number of PSFCH transmissions in the same time slot, not on the power required for the intended receiver. When the UE operates outside network coverage or does not provide dl-P0-PSFCH (e.g., when the sidelink resource pool occurs in resources not shared with the UL of the Uu), power control depends only on the number of PSFCH transmissions in the same time slot, unaffected by path loss to the gNB and associated interference to UL reception at the gNB. In other words, if the UE only needs to perform one PSFCH transmission and does not provide dl-P0-PSFCH (i.e., no power control is required for the serving cell), the UE will impose power on the serving cell by P... CMAX The given maximum transmit power.

[0057] In response to the reception of PSCCH / PSSCH transmissions (when the receiver is the intended receiver), HARQ feedback is transmitted via PSFCH. The required transmit power is calculated according to the PSFCH power control procedure. However, similar to all transmissions occurring in the n46 and n96 / n102 bands, PSFCH transmissions must also comply with OCB and PSD regulations.

[0058] To comply with OCB requirements, an agreement has been reached to use a combination of dedicated and general PRBs to transmit the PSFCH. A dedicated PRB is a collection of one or more PRBs that carry the actual PSFCH payload bits, while the general PRBs are interleaved to ensure that the transmission has sufficient bandwidth to meet OCB requirements.

[0059] The fact that each UE uses a common interleaving or common RB and one or more dedicated RBs for PSFCH transmission means that the common interleaving / RB can be used by multiple UEs. As a result, the power in this common interleaving can increase linearly with the number of UEs that need to transmit HARQ feedback, while the power of the dedicated RBs can be lower. This can lead to additional, unwanted interference that disrupts the operation of other devices on the same spectrum and unnecessarily increases power consumption. Furthermore, common interleaving can also cause interference with in-band transmission of dedicated RBs. Therefore, it is preferable to avoid using more TX power for common interleaving / RBs than is required.

[0060] Figure 3 An example of a 20MHz bandwidth with a 15kHz subcarrier spacing is shown, where interleaving 1 (i.e., RB 1, 11, 21, ..., 91) can be used as a common interleaving by multiple UEs (e.g., 5 UEs), and RB 4, 15, 83, 94, and 97 can be used as dedicated RBs for each UE. Figure 3 As shown, if each UE transmits its dedicated and common RBs at the same power, the total power transmitted on the common RB can be five times the power on the dedicated RB. This large power imbalance between the dedicated and common RBs can interfere with other nearby UEs and / or affect the decoding of information transmitted on the dedicated RB.

[0061] In side-link operations on unlicensed spectrum, dedicated and public PRBs are used to transmit PSFCH carrying HARQ-ACKs corresponding to data packets. The dedicated PRB carries the actual payload bits, while the public PRB is transmitted to ensure that the PSFCH signal has sufficient bandwidth to meet relevant regulatory requirements.

[0062] The embodiments of this disclosure provide a solution for determining the transmit power of common interleaving / RB such that, under power constraints, common interleaving does not affect the transmit power of dedicated interleaving. Exemplary embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0063] Figure 4 Example signaling diagram 400 illustrates power control of the Physical Side Link Feedback Channel (PSFCH) according to some exemplary embodiments of this disclosure. For the purposes of discussion, reference will be made, for example, using a first device 110 and a second device 120. Figure 1 Discuss signaling diagram 400.

[0064] Figure 4 The example embodiments relate to side-link operation on unlicensed spectrum. In these embodiments, a first set of RBs (e.g., a public PRB) and a second set of RBs (e.g., a dedicated PRB) are used to transmit the PSFCH carrying HARQ-ACKs corresponding to data packets. The dedicated PRB may carry the actual payload bits, while the public PRB is transmitted to ensure that the PSFCH signal has sufficient bandwidth to meet regulatory requirements.

[0065] like Figure 4 As shown, the first device 110 determines (405) that the power required for transmission on the Physical Side Link Feedback Channel (PSFCH) exceeds the configured power for the first device 110, wherein the determined power includes a first power of a first set of resource blocks and a second power of a second set of resource blocks.

[0066] The configured power can be a power configured or predetermined by network device 130. For example, the configured power may include, for instance, the maximum output power configured for the PSFCH, denoted as Pcmax. It should be noted that the maximum output power configured for the PSFCH may only be one example of the configured power. In other example embodiments of this disclosure, the configured power may have other values.

[0067] In some exemplary embodiments, the first resource block set may include at least one public physical resource block, and the second resource block set may include at least one private physical resource block.

[0068] Alternatively or additionally, in some example embodiments, the first set of resource blocks may include a subset of the first interleaved public physical resource blocks, and the second set of resource blocks may include a subset of the second interleaved private physical resource blocks.

[0069] The first device 110 may first determine a first power and a second power, and then determine the power required for transmission on the (405) PSFCH based on the first and second powers. In some example embodiments, the first power may be calculated based on the power of each resource block (e.g., PRB) in the first set and the number of PRBs in the first set. The second power may be calculated based on the power of each resource block (e.g., PRB) in the second set and the number of PRBs in the second set.

[0070] If the power required for PSFCH transmission exceeds the configured power, the first device 110 performs (410) transmission on the physical side link feedback channel, wherein the first power of the first resource block set can be reduced based on the configured power.

[0071] In some embodiments, the first power of the first set of resource blocks can be reduced to a target power, wherein the sum of the target power and the second power is less than or equal to the configured power. In some embodiments, the first device 110 can reduce the first power for each resource block. That is, the reduction of the first power is achieved by controlling the power of one or more resource blocks (e.g., PRBs).

[0072] In some example embodiments, the power allocated to the first set of PRBs may be reduced until the sum of the power of the first set and the second set of PRBs no longer exceeds the configured power for the first device 110, such as the maximum power of the UE.

[0073] Furthermore, after the first power reduction, the first device 110 can determine whether the Occupied Channel Bandwidth (OCB) requirement is met, for example, by checking specifications regarding bandwidth and / or signal power. If the Occupied Channel Bandwidth requirement is not met after the first power reduction, the first device 110 can omit the transmission of at least one resource block in the first set located at a certain distance from the outermost resource block of the physical side link feedback channel. That is, the transmission of some PRBs in the first set can be omitted, for example, the transmission of PRBs that are not the outermost ones.

[0074] Optionally, after omitting the transmission of at least one resource block from the first set, the first device 110 may determine whether the OCB requirement is met. If not, the first device 110 may reduce the second power of the second resource block set.

[0075] As an alternative to the power reduction method described above, in some example embodiments, the first power of the first resource block set can be reduced by omitting the transmission of at least one resource block in the first resource block set, i.e., setting the power of these resource blocks to zero. In this case, at least one resource block can be determined from the first resource block set based on at least one of configured power or occupied channel bandwidth requirements.

[0076] In some example embodiments, the at least one resource block determined from the first set may be located at a distance from the outermost resource block of the physical side link feedback channel. For example, the transmission of some PRBs in the first set may be omitted, e.g., the transmission of the outermost PRB. In some cases, the first device 110 may determine not to transmit some PRBs in the first set if the OCB requirement can be satisfied without transmitting those PRBs.

[0077] In this way, even if the power on a public PRB is as high as that on a dedicated PRB in some cases, the dedicated PRB can still transmit at the highest possible power. Therefore, unnecessary interference and power consumption can be reduced.

[0078] Figure 5A flowchart of a process 500 for PSFCH power control according to some example embodiments of the present disclosure is shown. Process 500 can be performed by a first device 110 that performs PSFCH transmission as described above. For the purposes of discussion, [the following will be discussed]. Figure 1 The process 500 is described from the angle of the first device 110 in the middle.

[0079] In block 510, the first device 110 determines that the power required for transmission on the physical side link feedback channel exceeds the configured power for the first device 110, wherein the power required for transmission includes a first power of a first resource block set and a second power of a second resource block set. That is, the power required for transmission may include both the first power and the second power.

[0080] In block 520, the first device 110 performs a transmission on the physical side link feedback channel, wherein the first power of the first resource block set is reduced based on the configured power.

[0081] In some example embodiments, the first device 110 reduces the first power such that the power required for transmission does not exceed the configured power of the first device 110. Various examples of how the first power can be reduced are discussed herein, but may include, for example, reducing the power of each resource block in the first resource block set and / or omitting transmissions of one or more of the second resource block set.

[0082] In some example embodiments, the first power of the first resource block set is reduced to a target power, wherein the sum of the target power and the second power is less than or equal to the configured power.

[0083] In some example embodiments, the device reduces the first power for each resource block.

[0084] In some example embodiments, method 500 further includes: determining a first number of resource blocks in a first set and a second number of resource blocks in a second set; and determining a third power for each resource block in the first set based on at least one of a configuration power or power threshold, the first number, the second number, and a fourth power for each resource block in the second set.

[0085] In some example embodiments, method 500 further includes: determining whether the occupied channel bandwidth requirement is met after reducing the first power; and omitting the transmission of at least one resource block of a first set located at a certain distance from the outermost resource block of the physical side link feedback channel, based on the determination that the occupied channel bandwidth requirement is not met after reducing the first power.

[0086] In some example embodiments, method 500 further includes: determining whether the occupied channel bandwidth requirement is met after the transmission of at least one resource block of the first set is omitted; and reducing the second power of the second resource block set based on the determination that the occupied channel bandwidth requirement is not met after the transmission of at least one resource block of the first set is omitted.

[0087] In some example embodiments, the first power of the first resource block set is reduced by omitting the transmission of at least one resource block from the first resource block set, the at least one resource block being determined from the first resource block set based on at least one of configured power or occupied channel bandwidth requirements.

[0088] In some example embodiments, the at least one resource block of the first set is located at a certain distance from the outermost resource block of the physical side link feedback channel.

[0089] In some example embodiments, the configured power includes a maximum configured power, such as the maximum output power configured for the physical sidelink feedback channel. The maximum output power can be configured, for example, via the RRC parameter sl-MaxTransPower, which indicates the maximum value of the UE's sidelink transmit power on that resource pool, in dBm.

[0090] In some exemplary embodiments, the first resource block set includes at least one public physical resource block, and the second resource block set includes at least one private physical resource block.

[0091] In some example embodiments, the first resource block set includes a subset of the first interleaved public physical resource blocks, and the second resource block set includes a subset of the second interleaved private physical resource blocks.

[0092] The core idea is to scale the transmit power on the common interleaving based on the UE's total transmit power and the UE's maximum transmit power P_CMAX.

[0093] If the UE has no power limit when transmitting a dedicated PRB (the UE can transmit a PRB with the maximum PSD allowed by regulation, or transmit at a TX power level calculated based on path loss), then the common PRB is transmitted at a predefined power level relative to the power level of the dedicated PRB (e.g., each common PRB has a power level P_(PSFCH, offset) lower than the power of the dedicated PRB).

[0094] If the UE is power-limited, i.e., the dedicated PRB cannot transmit at the highest permissible PSD or TX power level calculated based on path loss, the UE should reduce the transmit power allocated to the public PRB while keeping the power on the dedicated PRB at the maximum level allowed by regulations (e.g., 10 or 11 dBm / MHz).

[0095] This could further involve omitting the transmission of some common PRBs, such as those that are not the outermost PRBs (i.e., those closest to the channel edge).

[0096] This could further involve limiting the reduction of transmit power allocated to the public PRB (so that the power on each of the public RBs should be greater than x% of the total Tx power) (to ensure that 99% of the total PSFCH energy (dedicated + public PSFCH RBs) is allocated to RBs spanning at least 80% of the nominal channel bandwidth), where x can be configured or fixed in the specification (e.g., x=1 or 5%).

[0097] To ensure that non-zero power is still allocated to the common PSFCH RB, the reduction of power in the common PSFCH RB can be limited to a minimum absolute value of power or a fraction of the total power.

[0098] This method reduces unnecessary power consumption and avoids unwanted interference.

[0099] Figure 6 A flowchart of an example process 600 for PSFCH power control according to some example embodiments of the present disclosure is shown. It should be understood that process 600 is an implementation of process 500. In process 600, the transmit power (also referred to as "first power") of the first RB set is reduced by reducing the power of each RB in the first set. Process 600 can also be performed by a first device 110 that performs PSFCH transmission as described above.

[0100] At 610, the first device 110 determines that the power required for transmission on the PSFCH exceeds the configured power for the device, the power required for transmission including a first power of a first set of resource blocks and a second power of a second set of resource blocks.

[0101] In the various example embodiments of this embodiment, (First) can represent the public PRB, while (Second) can represent a dedicated PRB. Therefore, the first resource block set can refer to the public PRB set, and the second resource block set can refer to the dedicated PRB set.

[0102] In some example embodiments, the first power may be determined based on the following:

[0103] , (1)

[0104] in, It is the number of PRBs in the first RB set, for example, a subset of the first interwoven PRBs, and This represents the power of each resource block in the first set.

[0105] Similarly, the second power can be determined based on the following:

[0106] , (2)

[0107] in, It is the number of PRBs in the second RB set, for example, a subset of the second interwoven PRBs, and This represents the power of each resource block in the second set.

[0108] Regarding the first power and the second power, the first device 110 determines the power required for PSFCH transmission by calculating the sum of the first power and the second power.

[0109] In some embodiments, the first device 110 can compare the required power with the configured maximum power (e.g., denoted as P). CMAX The comparison is made, and it is determined, for example, based on the following formula, whether the required power exceeds the maximum power:

[0110] (3)

[0111] At 620, the first device 110 reduces the first power of the first resource block set (e.g., public PRB) based on the configured power. In some example embodiments, if the first device 110 determines at 610 that the power required for transmission on the PSFCH exceeds P... CMAX Then it can set the power of each PRB in the common PRB set to a new value, as shown in formula (4) below. This makes the total power of the common PRB less than P. CMAX And thus, the power requirements can be met.

[0112] In the example implementation, the first device 110 can Set to:

[0113] (4)

[0114] in, It is the number of PRBs in the first interwoven PRB subset, and It is the number of PRBs in the PRB subset of the second interweaving.

[0115] Table 1 below provides more details on this matter.

[0116] Table 1

[0117]

[0118] It should be understood that power control can also be formulated using a logarithmic scale, which can be similarly reflected in the specifications, for example, as follows:

[0119] Table 2

[0120]

[0121] At 630, the first device 110 determines whether the OCB requirement is met after reducing the first power.

[0122] OCB requirements can be implemented in various ways. For example, it may be necessary to allocate transmit power to the common PRBs such that the power on each of the common RBs is greater than x% of the total Tx power, ensuring that 99% of the total PSFCH energy (dedicated + common PSFCH RBs) is allocated to RBs spanning at least 80% of the nominal channel bandwidth. In the various example embodiments of this disclosure, the actual implementation of this aspect can be quite diverse.

[0123] If the first device 110 determines at 630 that the OCB requirement is met, then process 600 proceeds to step 670 to perform PSFCH transmission. Otherwise, process 600 proceeds to step 640, wherein the first device 110 omits the transmission of at least one resource block of the first set located at a certain distance from the outermost resource block of the physical side link feedback channel.

[0124] Then, at 650, the first device 110 further determines whether the OCB requirement is met after the omission of the transmission at 640. If yes, process 600 proceeds to step 670 to perform PSFCH transmission. If no, process 600 proceeds to step 660, where the first device 110 reduces the second power of the second RB set (e.g., a dedicated PRB).

[0125] Figure 7 A flowchart of another example process 700 for PSFCH power control according to some example embodiments of the present disclosure is shown. It should be understood that, similar to process 600, process 700 is also an implementation of process 500. Unlike process 600, in process 700, the transmit power of the first RB set is reduced by omitting some transmits on the first RB set. Process 700 can also be performed by the first device 110 that performs PSFCH transmission as described above.

[0126] At 710, the first device 110 determines that the power required for transmission on the physical side link feedback channel exceeds the configured power for the device, the power required for transmission including a first power of a first resource block set and a second power of a second resource block set.

[0127] At 720, the first device 110 determines at least one resource block from the first resource block set based on the configuration power and / or occupied channel bandwidth requirements.

[0128] At 730, the first device 110 performs the transmission on the physical side link feedback channel by omitting the transmission of the at least one resource block.

[0129] In some example embodiments, a device capable of performing any of the methods 500 (e.g., Figure 1 The first device 110 may include means for performing various operations of method 500. The means may be implemented in any suitable form. For example, it may be implemented in a circuit or software module. The device may be implemented as or included in... Figure 1 In the first device 110.

[0130] In some example embodiments, the device includes: means for determining that the power required for transmission on a physical side link feedback channel exceeds the configured power for the device, the power required for transmission including a first power of a first set of resource blocks and a second power of a second set of resource blocks; and means for performing the transmission on the physical side link feedback channel, wherein the first power of the first set of resource blocks is reduced based on the configured power.

[0131] In some example embodiments, the first power of the first resource block set is reduced to a target power, wherein the sum of the target power and the second power is less than or equal to the configured power.

[0132] In some example embodiments, the device reduces the first power for each resource block.

[0133] In some example embodiments, the device further includes: means for determining a first number of resource blocks in the first set and a second number of resource modules in the second set; and means for determining a third power for each resource block in the first set based on at least one of the configuration power or power threshold, the first number, the second number, and a fourth power for each resource block in the second set.

[0134] In some example embodiments, the device further includes: means for determining whether the occupied channel bandwidth requirement is met after reducing the first power; and means for omitting the transmission of at least one resource block of the first set located at a certain distance from the outermost resource block of the physical side link feedback channel based on the determination that the occupied channel bandwidth requirement is not met after reducing the first power.

[0135] In some example embodiments, the device further includes: means for determining whether an occupied channel bandwidth requirement is met after the transmission of at least one resource block of the first set is omitted; and means for reducing the second power of the second resource block set based on the determination that the occupied channel bandwidth requirement is not met after the transmission of at least one resource block of the first set is omitted.

[0136] In some example embodiments, the first power of the first resource block set is reduced by omitting the transmission of at least one of the resources in the first set, the at least one resource block being determined from the first resource block set based on at least one of the configured power or occupied channel bandwidth requirements.

[0137] In some example embodiments, the at least one resource block of the first set is located at a certain distance from the outermost resource block of the physical side link feedback channel.

[0138] In some example embodiments, the configured power includes the maximum output power configured for the physical side link feedback channel.

[0139] In some exemplary embodiments, the first resource block set includes at least one public physical resource block, and the second resource block set includes at least one private physical resource block.

[0140] In some example embodiments, the first resource block set includes a subset of the first interleaved public physical resource blocks, and the second resource block set includes a subset of the second interleaved private physical resource blocks.

[0141] In some example embodiments, the device further includes means for performing other operations in some example embodiments of method 500 or first means 110. In some example embodiments, the device includes: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, trigger the performance of the device.

[0142] Figure 8 This is a simplified block diagram of a device 800 applicable to various example embodiments of the present disclosure. The device 800 may be provided to implement a communication device, for example, such as... Figure 1 The first device 110 or the second device 120 shown. As shown, the device 800 includes one or more processors 810, one or more memories 820 coupled to the processors 810, and one or more communication modules 840 coupled to the processors 810.

[0143] Communication module 840 is used for bidirectional communication. Communication module 840 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interface may represent any interface required for communication with other network elements. In some example embodiments, communication module 840 may include at least one antenna.

[0144] Processor 810 can be of any type suitable for a local technology network, and as a non-limiting example, may include one or more of the following: general-purpose computer, special-purpose computer, microprocessor, digital signal processor (DSP), and processor based on a multi-core processor architecture. Device 800 may have multiple processors, such as application-specific integrated circuit chips that are time-dependent on a clock of a synchronous main processor.

[0145] Memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, read-only memory (ROM) 824, electrically programmable read-only memory (EPROM), flash memory, hard disk, optical disc (CD), digital video disc (DVD), optical disc, laser disc, and other magnetic and / or optical memories. Examples of the volatile memories include, but are not limited to, random access memory (RAM) 822 and other volatile memories that do not persist during power-off periods.

[0146] Computer program 830 includes computer-executable instructions that are executed by an associated processor 810. The instructions of program 830 may include instructions for performing operations / actions of some example embodiments of this disclosure. Program 830 may be stored in memory such as ROM 824. Processor 810 may perform any suitable actions and processes by loading program 830 into RAM 822.

[0147] The various example embodiments of this disclosure can be implemented by means of program 830, such that device 800 can execute the reference. Figures 4 to 7 Any process discussed in this disclosure. The various example embodiments of this disclosure may also be implemented in hardware or a combination of software and hardware.

[0148] In some example embodiments, program 830 may be tangibly contained 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 the computer-readable medium into RAM 822 for execution. In some example embodiments, the computer-readable medium may include any type of non-transitory storage medium, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. As used herein, the term "non-transitory" refers to a limitation on the medium itself (i.e., tangible, not tactile), rather than a limitation on the persistence of data storage (e.g., RAM versus ROM).

[0149] Figure 9 An example of a computer-readable medium 900, which may be in the form of a CD, DVD, or other optical storage disc, is shown. The computer-readable medium 900 has a program 830 stored thereon.

[0150] Generally, the various embodiments of this disclosure can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects can be implemented in hardware, while others can be implemented in firmware or software executable by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of this disclosure are shown and described as block diagrams, flowcharts, or using some other graphical representation, it should be understood that, as non-limiting examples, the blocks, apparatuses, systems, techniques, or methods described herein can be implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0151] Some exemplary embodiments of this disclosure also provide at least one computer program product tangibly stored on a computer-readable medium, such as a non-transitory computer-readable medium. The computer program product includes computer-executable instructions, such as instructions contained in a program module, that execute in a device on a target physical or virtual processor to perform any of the methods described above. Typically, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc., that perform a particular task or implement a particular abstract data type. In various embodiments, the functionality of the program modules can be combined or divided among the program modules as needed. The machine-executable instructions of the program module can execute within a local or distributed device. In a distributed device, the program module can reside on both local and remote storage media.

[0152] The program code used to perform the methods of this disclosure may be written in any combination of one or more programming languages. This 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 when executed by the processor or controller, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The program code may be executed entirely on the machine, partially on the machine as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote computer or server.

[0153] 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, etc.

[0154] Computer-readable media can be computer-readable reference signal media or computer-readable storage media. Computer-readable media can include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any suitable combination thereof. More specific examples of computer-readable storage media will include electrical connections having one or more wires, portable computer floppy disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable optical disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0155] Furthermore, while the operations are described in a specific order, this should not be construed as requiring such operations to be performed in the specific order or sequence shown, or requiring all shown operations to be performed to obtain the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the foregoing discussion, these details should not be construed as limiting the scope of this disclosure, but rather as descriptions of features specific to particular embodiments. Unless explicitly stated otherwise, certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated otherwise, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0156] Although this disclosure has been described in language specific to structural features and / or methodological behavior, it should be understood that this disclosure as defined in the appended claims is not necessarily limited to the specific features or behaviors described above. Rather, the specific features and behaviors discussed above are disclosed as examples of implementing the claims.

Claims

1. An apparatus comprising: At least one processor; as well as At least one memory storing instructions that, when executed by the at least one processor, cause the device to at least: It is determined that the power required for transmission on the physical side link feedback channel exceeds the configured power for the device, wherein the power required for transmission includes a first power of a first resource block set and a second power of a second resource block set; as well as The transmission is performed on the physical side link feedback channel, wherein the first power of the first resource block set is reduced based on the configured power.

2. The apparatus of claim 1, wherein, The first power of the first resource block set is reduced to a target power, wherein the sum of the target power and the second power is less than or equal to the configured power.

3. The apparatus of claim 1, wherein, The device reduces the first power for each resource block.

4. The apparatus according to any one of claims 1 to 3, wherein, Make the device: Determine a first number of resource blocks in the first set and a second number of resource blocks in the second set; as well as A third power is determined for each resource block in the first set based on at least one of the configured power or power threshold, the first quantity, the second quantity, and a fourth power for each resource block in the second set.

5. The apparatus of claim 4, wherein, Make the device: Determine whether the occupied channel bandwidth requirement is met after reducing the first power; and Based on the determination that the occupied channel bandwidth requirement is not met after reducing the first power, the transmission of at least one resource block of the first set located at a certain distance from the outermost resource block of the physical side link feedback channel is omitted.

6. The apparatus of claim 5, wherein, Make the device: After omitting the transmission of at least one resource block of the first set, determine whether the occupied channel bandwidth requirement is met; as well as Based on the determination that the occupied channel bandwidth requirement is not met after omitting the transmission of at least one resource block of the first set, the second power of the second resource block set is reduced.

7. The apparatus as claimed in any one of claims 1 to 3, wherein, The first power of the first batch of resource blocks is reduced by omitting the transmission of at least one resource block from the first resource block set, the at least one resource block being determined from the first resource block set based on at least one of the configured power or occupied channel bandwidth requirements.

8. The apparatus of claim 7, wherein, The first set of at least one resource block is located at a certain distance from the outermost resource block of the physical side link feedback channel.

9. The apparatus according to any one of claims 1 to 8, wherein, The configured power includes the maximum output power configured for the physical side link feedback channel.

10. The apparatus according to any one of claims 1 to 9, wherein, The first set of resource blocks includes at least one public physical resource block, and the second set of resource blocks includes at least one private physical resource block.

11. The apparatus according to any one of claims 1 to 9, wherein, The first set of resource blocks includes a subset of the first interleaved public physical resource blocks, and the second set of resource blocks includes a subset of the second interleaved private physical resource blocks.

12. A method comprising: It is determined that the power required for transmission on the physical side link feedback channel exceeds the configured power for the device, wherein the power required for transmission includes a first power of a first resource block set and a second power of a second resource block set; as well as The transmission is performed on the physical side link feedback channel, wherein the first power of the first resource block set is reduced based on the configured power.

13. The method of claim 12, wherein, The first power of the first resource block set is reduced to a target power, wherein the sum of the target power and the second power is less than or equal to the configured power.

14. The method of claim 12, wherein, The device reduces the first power for each resource block.

15. The method of any one of claims 12 to 14, further comprising: Determine a first number of resource blocks in the first set and a second number of resource blocks in the second set; as well as A third power is determined for each resource block in the first set based on at least one of the configured power or power threshold, the first quantity, the second quantity, and a fourth power for each resource block in the second set.

16. The method of claim 15, further comprising: After reducing the first power, determine whether the occupied channel bandwidth requirement is met; as well as Based on the determination that the occupied channel bandwidth requirement is not met after reducing the first power, the transmission of at least one resource block of the first set located at a certain distance from the outermost resource block of the physical side link feedback channel is omitted.

17. The method of claim 15, further comprising: After omitting the transmission of at least one resource block of the first set, determine whether the occupied channel bandwidth requirement is met; as well as Based on the determination that the occupied channel bandwidth requirement is not met after omitting the transmission of at least one resource block of the first set, the second power of the second resource block set is reduced.

18. The method according to any one of claims 12 to 14, wherein, The first power of the first resource block set is reduced by omitting the transmission of at least one of the resource blocks in the first set, the at least one resource block being determined from the first resource block set based on at least one of the configured power or occupied channel bandwidth requirements.

19. The method of claim 18, wherein, The first set of at least one resource block is located at a certain distance from the outermost resource block of the physical side link feedback channel.

20. The method of any one of claims 12 to 19, wherein, The configured power includes the maximum output power configured for the physical side link feedback channel.

21. The method according to any one of claims 12 to 20, wherein, The first set of resource blocks includes at least one public physical resource block, and the second set of resource blocks includes at least one private physical resource block.

22. The method according to any one of claims 12 to 20, wherein, The first set of resource blocks includes a subset of the first interleaved public physical resource blocks, and the second set of resource blocks includes a subset of the second interleaved private physical resource blocks.

23. An apparatus comprising: A means for determining that the power required for transmission on the physical side link feedback channel exceeds the configured power for the device, wherein the power required for transmission includes a first power of a first set of resource blocks and a second power of a second set of resource blocks; as well as A means for performing the transmission on the physical side link feedback channel, wherein the first power of the first resource block set is reduced based on the configured power.

24. A computer-readable medium comprising instructions stored thereon for causing a device to perform at least the method as claimed in any one of claims 12-22.

Images