JP2022537626A - Communication method - Google Patents

Abstract

Embodiments of the present disclosure relate to methods, devices, and computer-readable media for HARQ feedback in sidelink transmissions. A communication method includes, at a receiving device in a sidelink transmission, receiving information from a transmitting device in a sidelink transmission; determining a mode of HARQ feedback for receiving the information; determining resources for sending the feedback from the set of resources for. The communication method further includes receiving HARQ feedback at a transmitting device. Embodiments of the present disclosure can improve resource allocation for HARQ feedback in sidelink transmissions. [Selection drawing] Fig. 2

Description

TECHNICAL FIELD Embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to methods, devices and computer storage media for hybrid automatic repeat request (HARQ) feedback in sidelink transmissions.

5G NR (New Radio) enables D2D (Device to Device)/V2X (Vehicle to Everything) communication. In order to enable communication between terminal devices, sidelink transmission via a physical sidelink control channel (PSCCH) or a physical sidelink share channel (PSSCH) is under consideration. The latest development defines a physical sidelink feedback channel (PSFCH) for conveying unicast and groupcast sidelink feedback control information (SFCI). In HARQ-based sidelink transmission, how to allocate resources for conveying HARQ feedback over PSFCH is very important.

Generally, exemplary embodiments of the present disclosure provide methods, devices, and computer storage media for HARQ transmission in sidelink transmission.

In a first aspect, a communication method is provided. The method comprises, at a receiving device in a sidelink transmission, receiving information from a transmitting device in the sidelink transmission; determining a HARQ feedback mode for receiving the information; and based on the HARQ feedback mode, , determining resources for transmission of said feedback from a set of resources for HARQ feedback.

In a second aspect, a communication method is provided. The method includes, at a transmitting device in a sidelink transmission, transmitting information to a receiving device in the sidelink transmission, and receiving HARQ feedback from the receiving device on receipt of the information, wherein the HARQ Feedback is sent on resources determined from the set of resources for the HARQ feedback based on the mode of the HARQ feedback.

In a third aspect, a receiving device is provided. The receiving device comprises a processor and memory coupled to the processor. The memory stores instructions which, when executed by the processor, cause the receiving device to perform the method according to the first aspect of the present disclosure.

In a fourth aspect, a transmitting device is provided. The transmitting device comprises a processor and memory coupled to the processor. The memory stores instructions that, when executed by the processor, cause the transmitting device to perform the method according to the second aspect of the disclosure.

In a fifth aspect, a computer-readable medium having instructions stored thereon is provided. The instructions, when executed by at least one processor, cause the at least one processor to perform the method according to the first aspect of the present disclosure.

In a sixth aspect, a computer-readable medium having instructions stored thereon is provided. The instructions, when executed by at least one processor, cause the at least one processor to perform the method according to the second aspect of the disclosure.

Other features of the present disclosure will become readily apparent from the discussion that follows.

The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of some embodiments of the present disclosure with reference to the accompanying drawings.

FIG. 1 illustrates an exemplary communication network in which some embodiments of the disclosure may be implemented.

FIG. 2 illustrates an exemplary communication method implemented in a receiving device according to some embodiments of the disclosure.

FIG. 3 shows a schematic diagram illustrating example time-frequency resources for transmission of HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 4 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 5 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 6 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 7 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 8 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 9 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 10 illustrates an example method of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure.

FIG. 11 illustrates an exemplary communication method implemented in a transmitting device according to some embodiments of the disclosure.

FIG. 12 is a simplified block diagram of a device suitable for implementing embodiments of the present disclosure;

Throughout the drawings, same or similar reference numbers represent same or similar elements.

The principles of the present disclosure will be explained with reference to several exemplary embodiments. It should be understood that these embodiments are described for illustrative purposes only, and do not imply any limitation as to the scope of the disclosure, and to aid those skilled in the art in understanding and practicing the present disclosure. The disclosure described herein can be embodied in various ways other than those described below.

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

As used herein, the term "terminal device" refers to any device with wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), mobile phones, computers, personal digital assistants (PDA), game machines, wearable devices, in-vehicle communication devices, MTC (Machine Type Communication) devices, D2D (Device to Device) communication devices, V2X (Vehicle to Everything) communication devices, sensors, etc., but not limited to these. The term "terminal device" is used interchangeably with UE, mobile station, subscriber station, mobile terminal, user terminal, or wireless device. Further, the term "network device" refers to a device capable of providing or hosting a cell or coverage with which terminal devices can communicate. Examples of network devices include Node B (NodeB or NB), Evolved NodeB (eNodeB or eNB), Next Generation NodeB (gNB), Transmission Reception Point (TRP), Remote Radio Unit (RRU), Examples include, but are not limited to, radio heads (RH), remote radio heads (RRH), and low power nodes such as femtonodes and piconodes.

As used herein, the singular forms "a," "an," and "the" are used unless the context clearly indicates otherwise. It is meant to include plural forms as well. The term "including" and variations thereof should be read as an open term meaning "including but not limited to." The term "based on" is read as "based at least in part on". The terms "one embodiment" and "embodiment" should be read as "at least one embodiment." The term "another embodiment" is read as "at least one other embodiment". Terms such as "first", "second" can refer to different objects or the same object. The following may contain other definitions, both explicit and implicit.

In some instances, values, procedures, or devices are referred to as "best," "lowest," "highest," "minimum," "maximum," and the like. Such statements are intended to indicate that there are many possible functional options to choose from, where such options are better, smaller, more expensive, or more favorable than other options. It should be understood that it is not necessary.

As mentioned above, in HARQ-based sidelink transmission, how to allocate resources for conveying HARQ feedback over PSFCH is very important. In some existing schemes, it is proposed that PSSCH/PSCCH in multiple slots can be associated with PSFCH in one slot, whereby PSFCH resources are associated with PSSCH/PSCCH resources. there is In addition, in some other existing schemes, the frequency domain resources of the PSFCH carrying HARQ-ACK are pre-configured to be associated with the corresponding PSSCH/PSCCH resources, and the PSFCH resource pool is the PSSCH/PSCCH resource pool. It is proposed to be pre-configured on specific sub-channels within the resource pool. In the context of this application, a subchannel is the smallest granularity of time-frequency resources used for information (eg PSSCH/PSCCH data) transmission. However, these schemes do not consider the situation where one PSSCH/PSCCH transmission needs to be fed back from multiple terminal devices via multiple PSFCH resources, and the same physical resource block (PRB : physical resource block) or interference between PSFCHs in adjacent PRBs.

Embodiments of the present disclosure provide a solution for sending HARQ feedback over the PSFCH so as to solve the problems mentioned above and one or more other potential problems. This solution can determine respective resources for HARQ feedback transmission for different HARQ feedback modes so as to improve PSFCH resource allocation and reduce interference between PSFCHs. The principles and embodiments of the present disclosure will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic diagram of an exemplary communication system 100 in which embodiments of the present disclosure may be implemented. As shown in FIG. 1, communication system 100 may include terminal devices 110 and 120 and a network device 130 that serves terminal devices 110 and 120 . It should be understood that the number of devices in FIG. 1 is given for illustration without implying any limitation on the present disclosure. Communication network 100 may include any suitable number of synchronization sources and/or terminal devices suitable for implementing the present disclosure.

As shown in FIG. 1, network device 130 may communicate with terminal devices 110 and 120 via channels (eg, wireless communication channels) 111 and 121, respectively. For example, network device 130 may send a configuration for SFCI to terminal devices 110 and 120 via channels 111 and 121, respectively. During the sidelink transmission, terminal devices 110 and 120, when acting as receiving devices, may transmit HARQ feedback for the PSSCH/PSCCH based on the received configuration.

Terminal devices 110 and 120 are shown in FIG. 1 as vehicles enabling D2D/V2X communication. It should be understood that embodiments of the present disclosure are also applicable to other terminal devices besides vehicles, such as mobile phones, sensors, and the like. In some embodiments, terminal device 110 may communicate with terminal device 120 via a sidelink. For example, terminal device 110 may transmit information to terminal device 120 via PSSCH/PSCCH 141 and receive HARQ feedback for receipt of information from terminal device 120 via PSFCH 142 .

Some embodiments are described below with reference to terminal device 110 as an example of a transmitting device (also called a source device) and terminal device 120 as an example of a receiving device (also called a destination device). For example, terminal device 110 may also be referred to as "transmitting device 110" and terminal device 120 may also be referred to as "receiving device 120." It should be understood that this is for illustrative purposes only, without suggesting any limitation on the scope of the disclosure.

Communications in communication system 100 may conform to any suitable standard, where standards include Global System for Mobile Communications (GSM), Long Term Evolution (LTE). , LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), GSM Including, but not limited to, EDGE Radio Access Network (GERAN), Machine Type Communication (MTC), and the like. Further, communication may be performed according to any generation of communication protocols now known or developed in the future. Examples of communication protocols include first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation ( 5G) communication protocols, but are not limited to these.

FIG. 2 illustrates an exemplary communication method 200 implemented at a receiving device according to some embodiments of the present disclosure. For example, method 200 may be performed at a communication device acting as a receiving device, such as terminal device 120 . For purposes of explanation, method 200 is described below with reference to FIG. It should be understood that the method 200 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 210, terminal device 120 receives information from a transmitting device (eg, terminal device 110). For example, terminal device 120 may receive information via PSCCH/PSSCH 141 in slots (denoted at 310 in FIG. 3, described below).

In some embodiments, information may be transmitted from transmitting device 110 via at least one of unicast, groupcast, and broadcast. In some embodiments, information transmitted from transmitting device 110 may include PSCCH and/or PSSCH data.
At block 220, terminal device 120 determines the mode of HARQ feedback for receiving information. In the context of the present application, feedback information is conveyed over PSFCH 142 in the format of a sequence. In some embodiments, the HARQ feedback modes are divided into a first mode in which only negative acknowledgments (NACKs) for receipt of information are fed back to the transmitting device, and a first mode in which only acknowledgments (ACKs) for receipt of information are fed back to the transmitting device. A second mode in which a frequency resource is fed back to the transmitting device or a negative acknowledgment (NACK) for receipt of information is fed back to the transmitting device on that frequency resource, and a first mode in which a positive acknowledgment (ACK) for receipt of information is fed back to the transmitting device on that frequency resource. a third mode in which frequency resources are fed back to the transmitting device, or negative acknowledgments (NACKs) for receipt of information are fed back to the transmitting device on a second frequency resource different from the first frequency resource. may be selected. Note that the HARQ feedback mode is not limited to the formats listed above, but may include other suitable formats.

In some embodiments, terminal device 120 may receive an indication of HARQ feedback mode from a transmitting device (eg, terminal device 110). For example, transmitting device 110 may determine the HARQ feedback mode based on the configuration of resources for transmission of feedback configured at network device 130, and may provide an indication of the HARQ feedback mode to the terminal, e.g., via PSCCH or PSSCH. It may be sent to device 120 . In some embodiments, the indication may be represented by a single bit, eg, 1 or 0. In alternate embodiments, the indication may be represented by more than one bit. Note that the instructions may be presented in any suitable format, and the scope of the disclosure is not limited in this respect.

In an alternative embodiment, terminal device 120 may receive an indication of the HARQ feedback mode from a network device (eg, network device 130) serving the receiving device. For example, the HARQ feedback mode may be configured by network device 130 and signaled to terminal device 120 via channel 121 .

In another alternative embodiment, terminal device 120 may determine the HARQ feedback mode itself depending on the cast type of the sidelink transmission. In some embodiments, the cast type may be one of unicast, groupcast, and broadcast. In some embodiments, terminal device 120 may receive configuration information regarding HARQ feedback mode selection from network device 130 in advance. For example, the configuration information is a mapping between HARQ feedback modes (eg, modes 1-3 above) and cast types for sidelink transmission (eg, unicast, groupcast and/or broadcast above). may include Upon receiving the information from terminal device 110, terminal device 120 may determine the HARQ feedback mode for the information depending on the configuration information and the cast type of sidelink transmission for the information.

At block 230, terminal device 120 may determine resources for HARQ feedback transmission from the set of resources for HARQ feedback based on the HARQ feedback mode. In some embodiments, the set of resources for HARQ feedback may be configured by network device 130 . More details will be described below with reference to FIG.

FIG. 3 shows a schematic diagram 300 illustrating example time-frequency resources for transmission of HARQ feedback in accordance with some embodiments of the present disclosure. For example, for information received over subchannel #1 in slot 310 (eg, PSCCH/PSSCH data), HARQ feedback for receipt of that information is sent over PSFCH in slot 330 after slot 310. may be Slot 330 is the first slot of the PSFCH resource and is a distance greater than A from slot 310 . The value of A is configured or specified by network device 130, for example. The frequency resources associated with slot 330 are thereby provided as a set of resources for HARQ feedback. It should be noted that, in addition to the examples given above, the determination of the set of resources may be implemented by any other suitable scheme, and the scope of the present disclosure is not limited in this respect.

According to various embodiments of the present disclosure, the allocation of PSFCH resources is improved because the respective resources for feedback transmission are determined according to different feedback modes. The details of resource determination will be described below.

Having determined the set of resources associated with a particular slot for HARQ feedback (eg, slot 330 in FIG. 3), a PRB from the set of resources (eg, PRB 331 in FIG. 3) is determined for transmission of HARQ feedback. and correspondingly determine the sequence for HARQ feedback indication. In some embodiments, an index of PRBs in a set of resources may be determined. In some embodiments, a cyclic shift may be determined for the base sequence configured in the receiving device.

In embodiments of the present disclosure, resources such as PRB indices and cyclic shifts are determined by HARQ feedback modes, resources associated with transmission of information, cast types for sidelink transmissions, transmit power of receiving devices, single It may be determined based on at least one of the number of devices that can be multiplexed in one PRB and the data type of the information. In some embodiments, resources associated with transmitting information may include at least subchannels or PRBs associated with transmitting information. In some embodiments, cast types for sidelink transmissions may include unicast, groupcast, or broadcast. In some embodiments, the data type of information may include at least one of PSCCH and PSSCH.

More specific embodiments of resource determination will now be described with reference to the first to third modes, respectively. It should be noted that the following description will be made with reference to FIG. 1 for convenience.

First Mode (Feedback Only NACKs)

In this case, assume that PSCCH/PSSCH information was received by terminal device 120 from terminal device 110 in slot c, and the index of the determined PRB in slot f is n.

Embodiment 1

In this embodiment, the PRB index n for HARQ feedback is configured or pre-configured. In this case, the resource is determined based on the index.

In some embodiments, n may be configured by network device 130, eg, in scheduled resource selection mode. In some embodiments, the configuration for n may be transferred by terminal device 110 to terminal device 120 . In an alternative embodiment, the configuration for n may be sent by network device 130 directly to terminal device 120 . In some embodiments, n may be determined by terminal device 120 according to a pre-configuration.

Embodiment 2

In this embodiment, at block 220, the first mode is determined as the HARQ feedback mode, and the resource determination for HARQ feedback is performed with reference to FIG. FIG. 4 illustrates an example method 400 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be understood that the method 400 may include additional blocks not shown and/or may omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 410, terminal device 120 may determine the index of the subchannel associated with the received information, eg, the index may be n_PSCCH or n_PSSCH, as described below. In the context of this application, a subchannel is the smallest granularity of time-frequency resources used for transmission of information (eg PSSCH/PSCCH data).

At block 420, terminal device 120 may determine resources for HARQ feedback based on the reference starting points configured for the resources and the indices of the subchannels. In some embodiments, the reference starting point may be configured by network device 130 . In some embodiments, the reference starting point may be determined by terminal device 120 according to a pre-configuration. In some embodiments, the reference starting point may be determined by terminal device 120 itself. In some embodiments, a reference starting point (eg, that shown at 332 in FIG. 3) may be predetermined per carrier, per set of resources, or per Groupcast session.

In some embodiments, n may be determined by the formula below.
n = n_2_0 + n_PSCCH (1)
or n=n_2_0+n_PSSCH (2)
where n_2_0 is the reference starting point configured for the resource. n_PSCCH is the index of the subchannel of the associated PSCCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is It is the number of the slot in which the PSFCH is allocated, and the values of a and b are predetermined. n_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or pre-configured.

In some embodiments, if receiving device 120 has multiple associated PSFCH PRBs in slot f, receiving device 120 may transmit the PSFCH in only one of the associated PRBs. For example, receiving device 120 may transmit the PSFCH on the PSFCH PRB associated with the most recently received PSCCH/PSSCH within range [fa, fb]. where f is the number of the slot in which the PSFCH is placed, and the values of a and b are configured by the network device 130, preconfigured by the terminal device 120, or determined by the terminal device 120. It should be understood that the above examples are merely illustrative without suggesting any limitation on the scope of the present disclosure.

At block 430, terminal device 120 may determine a sequence for feedback based on the configured or pre-configured cyclic shift values. In some embodiments, the cyclic shift value may be configured by network device 130 . In some embodiments, the cyclic shift value may be determined by terminal device 120 according to a pre-configuration. In some embodiments, the cyclic shift value may be configured by terminal device 110 . In some embodiments, the cyclic shift value may be determined by terminal device 120 itself.

In some embodiments, the cyclic shift of the PSFCH sequence is configured or pre-configured per carrier. In some embodiments, the cyclic shift of the PSFCH sequence is configured or pre-configured for each set of resources. In some embodiments, the cyclic shift of the PSFCH sequence is configured or pre-configured for each Groupcast session. In some embodiments, the cyclic shift of the PSFCH sequence is configured or pre-configured for each source device. In some embodiments, the cyclic shift of the PSFCH sequence is configured or pre-configured for each destination device.

At block 440, terminal device 120 may transmit HARQ feedback to terminal device 110 using the determined sequence on the frequency resources. It should be understood that the above examples are merely illustrative without suggesting any limitation on the scope of the present disclosure.

In this embodiment, the resource allocation for HARQ feedback is improved considering the HARQ feedback mode.

Embodiment 3

In this embodiment, the first mode is determined as the HARQ feedback mode, and determination of resources for HARQ feedback is performed with reference to FIG. FIG. 5 illustrates an exemplary method 500 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be understood that the method 500 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 510, terminal device 120 may determine whether information is to be sent via the groupcast session. If the information is sent via a groupcast session, at block 520 terminal device 120 may determine the index of the groupcast session associated with the information. In some embodiments, the groupcast session index may be configured by a network device (eg, network device 130) serving a destination device (eg, terminal device 120). In some embodiments, the groupcast session index may be determined by the source device (eg, terminal device 110).

At block 530, terminal device 120 may determine resources for HARQ feedback based on the reference starting point configured for resources and the index of the groupcast session. In some embodiments, the reference starting point may be configured by network device 130 . In some embodiments, the reference starting point may be determined by terminal device 120 according to a pre-configuration. In some embodiments, the reference starting point may be determined by terminal device 120 itself. In some embodiments, a reference starting point (eg, that shown at 332 in FIG. 3) may be predetermined per carrier, per set of resources, or per Groupcast session.

In some embodiments, n may be determined by the formula below.
n=n_3_0+n_session (3)
where n_3_0 is the reference starting point configured for the resource and n_Gsession is the index of the groupcast session.

In some embodiments, terminal device 120 may select resources from a subset of the set of resources sharable among multiple terminal devices to feed back NACKs only. In some embodiments, terminal device 120 may select resources such that the PRBs used for the first mode do not overlap with PRBs used for other HARQ modes. In some embodiments, terminal device 120 may transmit the PSFCH on only R resource elements (REs) located in the center of the PRB, where R<12, such that Transmissions on 12−R REs are punctured to reduce in-band emission (IBE) interference to neighboring PRBs.

In this embodiment, terminal device 120 may determine the sequence for feedback based on configured or pre-configured cyclic shift values. This process is similar to that described with reference to block 430 of FIG. 4 and will not be repeated here.

In this embodiment, resource allocation for HARQ feedback is done considering group cast, so that IBE interference between PSFCHs transmitted in adjacent PRBs can be reduced and resource allocation can be improved. .

Second mode (feedback ACK and NACK on the same frequency resource)

In this case, assume that PSCCH/PSSCH information was received by terminal device 120 from terminal device 110 in slot c, and the index of the determined PRB in slot f is m.

Embodiment 4

In this embodiment, the PRB index m for HARQ feedback is configured or pre-configured. In this case, the resource is determined based on that index. The determination of m in this embodiment is similar to the determination of n in Embodiment 1, except that the value of m may be configured to be different than n. Determining the cyclic shift of the PSFCH sequence for ACK and NACK feedback is also similar to embodiment 1, except that the values may be configured differently than in embodiment 1. In some embodiments, those values may be configured in the same manner as in the first mode. Other details are not repeated here for the sake of brevity.

Embodiment 5

In this embodiment, the second mode is determined as the HARQ feedback mode, and the determination of resources for HARQ feedback is as shown in FIG. This is the same as the second embodiment described with reference. In some embodiments, the reference starting point value in the second mode may be configured to be the same as the reference starting point value in the first mode. Other details are not repeated here for the sake of brevity.

Determining the cyclic shift of the PSFCH sequence for ACK and NACK feedback is also similar to embodiment 2, except that the value may be configured differently than in embodiment 2. In some embodiments, those values may be configured in the same manner as in the first mode. Other details are not repeated here for the sake of brevity.

Further, in some embodiments, terminal device 120 may select resources from a subset of the set of resources that can be used by dedicated terminal devices to transmit NACKs or ACKs using different sequences. good. In this way, intra-PRB interference between different PSFCHs and in-band emission (IBE) interference to neighboring PRBs is reduced.

Embodiment 6

In this embodiment, the second mode is determined as the HARQ feedback mode and the number of devices that can be multiplexed in a single PRB for HARQ feedback is configured or pre-configured. In this case, determination of resources for HARQ feedback is performed with reference to FIG. FIG. 6 illustrates an example method 600 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be understood that the method 600 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 610, terminal device 120 may determine the index of the subchannel associated with the received information, eg, the index may be m_PSCCH or m_PSSCH, as described below. In the context of this application, a subchannel is the smallest granularity of time-frequency resources used for information (eg PSSCH/PSCCH data) transmission.

At block 620, terminal device 120 determines resource for HARQ feedback based on the configured or preconfigured reference starting point, the number of devices that can be multiplexed in a single PRB for HARQ feedback, and the subchannel index. may be determined. In some embodiments, the reference starting point may be configured by network device 130 . In some embodiments, the reference starting point may be determined by terminal device 120 according to a pre-configuration. In some embodiments, the reference starting point may be determined by terminal device 120 itself. In some embodiments, a reference starting point (eg, that shown at 332 in FIG. 3) may be predetermined per carrier, per set of resources, or per Groupcast session.

In some embodiments, the number of devices that can be multiplexed in a single PRB for HARQ feedback is the maximum number of devices that can be multiplexed in a single PRB for HARQ feedback. In some embodiments, the number of devices may be configured by network device 130 . In some embodiments, the number of devices may be determined according to preconfiguration by the terminal device 120 . In some embodiments, the number of devices may be determined by terminal device 120 itself. In some embodiments, the number of devices may be predetermined per carrier, per set of resources, or per groupcast session. For example, the number of devices can be predetermined to be 2 or 6 per set of resources. Note that this is an illustrative example only, and the scope of the disclosure is not limited in this respect.

In some embodiments, m may be determined by the following formula.
m=m_3_0+floor(m_PSCCH/M3) (4)
or m=m_3_0+floor(m_PSSCH/M3) (5)
where m_3_0 is a configured or pre-configured reference starting point. m_PSCCH is the index of the subchannel of the associated PSCCH in subchannel set S, where S is all subchannels belonging to the PSSCH resource within the time range [f−a, f−b], and f is The number of the slot in which the PSFCH is placed, and the values of a and b are configured or specified. m_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or specified. M3 is the number of terminal devices that can be multiplexed with one PRB.

In this embodiment, terminal device 120 may select resources from a subset of the set of resources sharable among multiple terminal devices to transmit NACKs or ACKs using different sequences. In this way, intra-PRB interference between PSFCHs and in-band emission (IBE) interference to adjacent PRBs is reduced.

At block 630, terminal device 120 may determine the first sequence for one of ACK and NACK in HARQ feedback based on the receiving device index and the number of devices that can be multiplexed in a single PRB for HARQ feedback. may decide. In some embodiments, the cyclic shift of the PSFCH sequence for ACK and NACK feedback may be a function of m_PSCCH or m_PSSCH. For example, the cyclic shift for ACK may be equal to mod(x6*mod(m_PSCCH,M3)+y6,12), where the values of x6 and y6 are configured, preconfigured, or specified. , x6 can be 1 and y6 can be 0. Note that this is an illustrative example only and the cyclic shift for ACK or NACK can be determined by m_PSCCH or any other suitable function of m_PSSCH.

At block 640, terminal device 120 may determine a second sequence for the other of the ACKs and NACKs in the feedback based on the first sequence and the predetermined value. In some embodiments, the predetermined value may be determined according to a pre-configuration by the device. In some embodiments, the predetermined value may be determined by terminal device 120 . Corresponding to the example above, the cyclic shift for NACK may be equal to mod(x6*mod(m_PSCCH,M3)+y6+6,12). Note that this is just an illustrative example, and the predetermined value may be any other suitable integer.

At block 650, terminal device 120 may send HARQ feedback to the transmitting device using the first or second sequence on the resource. Thereby, resource allocation for HARQ feedback is made considering the number of devices that can be multiplexed in a single PRB for HARQ feedback, interference between PSFCHs in the same PRB can be reduced, and resource Allocation can be improved.

Embodiment 7

In this embodiment, the second mode is determined as the HARQ feedback mode, taking into account the transmit power of the receiving device. In this case, determination of resources for HARQ feedback is performed with reference to FIG. FIG. 7 illustrates an example method 700 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be appreciated that the method 700 may include additional blocks not shown and/or may omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 710, terminal device 120 may determine whether the transmit power of a receiving device (e.g., terminal device 120) is in a first range or in a second range different from the first range. good. If the terminal device 120 determines that the transmit power of the terminal device 120 is in the first range, then at block 720 the terminal device 120 is configured for the physical resource block (PRB) index for HARQ feedback. Based on the value of 1, resources may be determined. If the terminal device 120 determines that the transmit power of the terminal device 120 is in the second range, then at block 730 the terminal device 120 is different from the first value configured for the PRB index for HARQ feedback. A resource may be determined based on the second value.

In some embodiments, the first and second values may be configured by network device 130 . In some embodiments, the first and second values may be determined by terminal device 120 according to a pre-configuration. It should be noted that the first and second range divisions are merely illustrative and exemplary, and third or more range divisions for the transmit power of the receiving device and corresponding settings of the third or more values are also possible. , are within the scope of the present invention.

In some embodiments, if receiving device 120 has multiple associated PSFCH PRBs in slot f, receiving device 120 may transmit the PSFCH in only one of the associated PRBs. For example, receiving device 120 may transmit the PSFCH in the PSFCH PRB associated with the most recently received PSCCH/PSSCH in the range [fa, fb], where f is the number of the slot in which the PSFCH is located. and the values of a and b are configured by the network device 130, pre-configured by the device manufacturer, or determined by the terminal device 120.

In this embodiment, the sequence determination for HARQ feedback is similar to that described with reference to block 430 of FIG. 4, so the details are not repeated here. This allows resource allocation for HARQ feedback to take into account the transmit power of the receiving device, reduce IBE interference between PSFCHs transmitted in adjacent PRBs, and improve resource allocation.

Embodiment 8

In this embodiment, the second mode is determined as the HARQ feedback mode, the number of devices that can be multiplexed in a single PRB for HARQ feedback is configured or pre-configured, and the transmit power of the receiving devices is considered. In this case, determination of resources for HARQ feedback is performed with reference to FIG. FIG. 8 illustrates an example method 800 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be appreciated that the method 800 may include additional blocks not shown and/or may omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 810, terminal device 120 may determine whether the transmit power of a receiving device (e.g., terminal device 120) is within a first range or within a second range different from the first range. good. If terminal device 120 determines that the transmit power of terminal device 120 is in the first range, at block 820 terminal device 120 may determine the subchannel index associated with the information. At block 830, terminal device 120 determines the resource based on the first reference starting point configured for the resource, the index, and the number of devices that can be multiplexed in a single PRB for HARQ feedback. good too.

In some embodiments, m may be determined according to the following formula.
m = m_6_0 + floor (m_PSCCH/M6) (6)
or m=m_6_0+floor(m_PSSCH/M6) (7)
where m_6_0 is the first reference starting point configured for the resource. m_PSCCH is the index of the subchannel of the associated PSCCH in subchannel set S, where S is all subchannels belonging to the PSSCH resource within the time range [f−a, f−b], and f is The number of the slot in which the PSFCH is placed, and the values of a and b are configured or specified. m_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or specified. M3 is the number of terminal devices that can be multiplexed with one PRB.

If terminal device 120 determines that the transmit power of terminal device 120 is in the second range, at block 840 terminal device 120 may determine the subchannel index associated with the received information, e.g., The index can be m_PSCCH or m_PSSCH, as described below. The processing of block 840 is similar to that of block 820 . At block 850, terminal device 120 may configure a second reference starting point different from the first starting point configured for the resource, the index, and the number of devices that can be multiplexed in a single PRB for HARQ feedback. may be used to determine resources.

In some embodiments, m may be determined according to the following formula.
m = m_6_1 + floor (m_PSCCH/M6) (8)
or
m = m_6_1 + floor (m_PSSCH/M6) (9)
where m_6_1 is the second reference starting point configured for the resource. m_PSCCH is the index of the subchannel of the associated PSCCH in subchannel set S, where S is all subchannels belonging to the PSSCH resource within the time range [f−a, f−b], and f is The number of the slot in which the PSFCH is placed, and the values of a and b are configured or specified. m_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or specified. M6 is the number of terminal devices that can be multiplexed with one PRB.

In some embodiments, the first and second reference starting points may be configured by network device 130 in association with the first and second ranges, respectively. In some embodiments, the first and second reference starting points may be determined by terminal device 120 according to a pre-configuration. It should be noted that the first and second range divisions are merely illustrative examples, and the third or more range divisions for the transmit power of the receiving device and the corresponding settings for the third or more reference starting points. is also within the scope of the present invention.

Other details regarding the determination of the sub-channel index, the determination of the first and second reference starting points are similar to those described with reference to FIG. 6, for example, and will not be repeated here.

In this embodiment, terminal device 120 may select resources from a subset of the set of resources sharable among multiple terminal devices to transmit NACKs or ACKs using different sequences. In this way, IBE interference to adjacent PRBs is reduced.

In some embodiments, if receiving device 120 has multiple associated PSFCH PRBs in slot f, receiving device 120 may transmit the PSFCH in only one of the associated PRBs. For example, receiving device 120 may transmit the PSFCH in the PSFCH PRB associated with the most recently received PSCCH/PSSCH in the range [fa, fb], where f is the number of the slot in which the PSFCH is located. and the values of a and b are configured by the network device 130, pre-configured by the device manufacturer, or determined by the terminal device 120.

In this embodiment, the sequence determination for HARQ feedback is similar to that described with reference to blocks 630 and 640 of FIG. In some embodiments, the cyclic shift of the PSFCH sequence for ACK and NACK feedback may be a function of m_PSCCH or m_PSSCH. For example, the cyclic shift for ACK may be equal to mod(m_PSCCH,M6) and the cyclic shift for NACK may be equal to mod(m_PSCCH,M6)+6. Other details are not repeated here.

Accordingly, resource allocation for HARQ feedback is performed in consideration of the number of devices that can be multiplexed in one PRB for HARQ feedback and the transmission power of the receiving device. , and interference between PSFCHs transmitted on the same PRB can be reduced, and resource allocation can be further improved.

Embodiment 9

In this embodiment, the second mode is determined as the HARQ feedback mode and the information is sent over the groupcast session. In this case, determination of resources for HARQ feedback is performed with reference to FIG. FIG. 9 illustrates an example method 900 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be understood that the method 900 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 910, terminal device 120 may determine whether information is to be sent via the groupcast session. If the information is sent via a groupcast session, at block 920 terminal device 120 may determine the index of the groupcast session associated with the information.

At block 930, the terminal device 120 may determine resources for HARQ feedback based on the reference starting point configured for resources, the index of the groupcast session, and a predetermined value. In some embodiments, the predetermined value may be configured by a service provider (eg, network device 130) to a destination device (eg, terminal device 120). In some embodiments, the predetermined value may be determined by a source device (eg, terminal device 110). For example, the predetermined value may be one. Alternatively, the predetermined value may be 0. Note that this is an illustrative example only, and the scope of the disclosure is not limited in this respect.

In some embodiments, m may be determined by the following formula.
m = m_4_0 + m_session + delta (10)
where m_4_0 is the reference starting point, and m_4_0 may be equal to n_3_0. n_Gsession is the groupcast session index. delta is a predetermined value. Note that this is an illustrative example only, and the scope of the disclosure is not limited in this respect.

Other details regarding determining the groupcast session index and determining the reference starting point are similar to those described with reference to FIG. 5, for example, and will not be repeated here.

In this embodiment, terminal device 120 may determine the sequence for feedback based on configured or pre-configured cyclic shift values. The sequence determination for HARQ feedback is similar to that described with reference to block 430 of FIG. 4, so the details are not repeated here.

Thereby, resource allocation for HARQ feedback is made considering group cast, IBE interference between PSFCHs transmitted in adjacent PRBs can be reduced, and resource allocation can be improved.

Embodiment 10

In this embodiment, the second mode is determined as the HARQ feedback mode, the information is transmitted via a Groupcast session, and the number of devices that can be multiplexed in a single PRB for HARQ feedback is configured or preconfigured. be. In this case, determination of resources for HARQ feedback is performed with reference to FIG. FIG. 10 illustrates an example method 1000 of determining resources for HARQ feedback in accordance with some embodiments of the present disclosure. It should be understood that the method 1000 may include additional blocks not shown and/or omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 1010, terminal device 120 may determine the index of the groupcast session associated with the information. Determining the groupcast session index is similar to that described with reference to block 520 of FIG.

At block 1020, terminal device 120 may determine the index of the receiving device (eg, terminal device 120) in the groupcast session. In some embodiments, the index of receiving devices may be constructed by a network device (eg, network device 130) serving a destination device (eg, terminal device 120). In some embodiments, the index of the receiving device may be determined by the source device (eg, terminal device 110).

At block 1030, the terminal device 120 sets the reference starting point configured for the resource, the groupcast session index, the receiving device index, the number of devices that can be multiplexed in a single PRB for HARQ feedback, and the first A resource may be determined based on a predetermined value of . Determination of the reference starting point and number of devices is similar to that described with reference to block 620 of FIG. Determining the first predetermined value is similar to determining the predetermined value described with reference to block 930 of FIG.

In some embodiments, m may be determined by the following formula.
m=m_7_0+m_Gsession+delta+d_UE (11)
Here, m_7_0 is the reference starting point, and m_7_0 may be equal to n_3_0. n_Gsession is the groupcast session index. delta is a predetermined value. d_UE=floor(i_UE/M7), where i_UE is the index of the receiving device in the groupcast session and M7 is the number of devices that can be multiplexed in one PRB for HARQ feedback. Note that this is an illustrative example only, and the scope of the present disclosure is not limited in this respect.

In this embodiment, terminal device 120 may select resources from a subset of the set of resources sharable among multiple terminal devices to transmit NACKs or ACKs using different sequences. In this way, IBE interference to adjacent PRBs is reduced.

At block 1040, terminal device 120 selects the first sequence for one of ACK and NACK in HARQ feedback based on the index of the receiving device and the number of devices that can be multiplexed in a single PRB for HARQ feedback. may decide. In some embodiments, the cyclic shift of the PSFCH sequence for ACK and NACK feedback may be a function of i_UE and M7. For example, the cyclic shift for ACK may be equal to mod(x10*mod(i_UE,M7)+y10,12), where the values of x10 and y10 are configured, preconfigured, or specified , x10 can be 1 and y10 can be 0. Note that this is only an illustrative example and the cyclic shift for ACK or NACK can be determined with any other suitable function of i_UE and M7.

At block 1050, terminal device 120 may determine a second sequence for the other of the ACKs and NACKs in the feedback based on the first sequence and the second predetermined value. In some embodiments, the second predetermined value may be determined by terminal device 120 according to a pre-configuration. In some embodiments, the second predetermined value may be determined by terminal device 120 . Corresponding to the example above, the cyclic shift for NACK may be equal to mod(x10*mod(i_UE,M7)+y10+6,12). Note that this is an illustrative example only, and the second predetermined value may be any other suitable integer.

At block 1060, terminal device 120 may send HARQ feedback to the transmitting device using the first or second sequence on the resource. Thereby, the resource allocation for HARQ feedback is made considering the group cast and the number of devices that can be multiplexed in one PRB for HARQ feedback, and the IBE interference between PSFCHs transmitted in adjacent PRBs, and IBE interference between PSFCHs transmitted in the same PRB can be reduced, further improving resource allocation.

Embodiment 11

In this embodiment, the second mode is determined as the HARQ feedback mode, the information is transmitted via the groupcast session, and the PRB index m for feedback is configured or pre-configured. In this embodiment, terminal device 120 determines a sequence for HARQ feedback based on the index of the receiving device in the groupcast session, and uses the sequence on resources corresponding to the PRB index for HARQ feedback. , may send HARQ feedback to terminal device 110 .

In some embodiments, the cyclic shift of PSFCH resources for ACK and NACK feedback may be a function of the receiving device's index i_UE in the groupcast session.

In some embodiments, if receiving device 120 has multiple associated PSFCH PRBs in slot f, receiving device 120 may transmit the PSFCH in only one of the associated PRBs. For example, receiving device 120 may transmit the PSFCH in the PSFCH PRB associated with the most recently received PSCCH/PSSCH in the range [fa, fb], where f is the number of the slot in which the PSFCH is located. and the values of a and b are configured by the network device 130, pre-configured by the device manufacturer, or determined by the terminal device 120. It should be understood that the above examples are merely illustrative without suggesting any limitation on the scope of the present disclosure.

Embodiment 12

In this embodiment, the second mode is determined as the HARQ feedback mode and the information is sent over the groupcast session. In this embodiment, terminal device 120 may determine the index of the subchannel associated with the received information, eg, the index may be m_PSCCH or m_PSSCH, as described below. Terminal device 120 may also determine resources based on reference starting points configured for the resources and subchannel indices. This process is similar to that described with reference to block 420 of FIG.

In some embodiments, m may be determined by the following formula.
m = m_9_0 + m_PSCCH (12)
or m=m_9_0+m_PSSCH (13)
where m_9_0 is the reference starting point configured for the resource. m_PSCCH is the index of the subchannel of the associated PSCCH in subchannel set S, where S is all subchannels belonging to the PSSCH resource within the time range [f−a, f−b], and f is The number of the slot in which the PSFCH is allocated, and the values of a and b are pre-configured. m_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or pre-configured.

In some embodiments, terminal device 120 may select resources from a subset of the set of resources available to dedicated terminal devices to transmit NACKs or ACKs using different sequences. In this way, in-band emission (IBE) interference to neighboring PRBs is reduced.

In this embodiment, terminal device 120 determines a sequence for HARQ feedback based on the index of the receiving device in the groupcast session, and uses the sequence on resources corresponding to the PRB index for HARQ feedback. , may send HARQ feedback to the transmitting device. In some embodiments, the cyclic shift of PSFCH resources for ACK and NACK feedback may be a function of the receiving device's index i_UE in the groupcast session. This point is the same as the eleventh embodiment.

Third mode (feedback ACK and NACK on different frequency resources)

In this case, assume that PSCCH/PSSCH information was received by terminal device 120 from terminal device 110 in slot c, and the index of the determined PRB in slot f is r.

In this mode, terminal device 120 may determine a first frequency resource for transmission of ACKs in feedback and a second frequency resource for transmission of NACKs in feedback. Further embodiments are described below for determining resources for feedback of ACKs, assuming that the second frequency resources for NACKs are determined according to the first mode described above. Note that this is an illustrative example only, and the scope of the disclosure is not limited in this respect.

Embodiment 13

In this embodiment, the third mode is determined as the HARQ feedback mode, the information is transmitted over the groupcast session, and the number of devices that can be multiplexed in a single PRB for HARQ feedback is configured or preconfigured. be done.

In this embodiment, the terminal device 120 determines the index of the groupcast session associated with the information, determines the index of the receiving device in the groupcast session, the reference starting point configured for the resource, the groupcast session The first frequency resource may be determined based on the index, the index of the receiving device, the number of devices that can be multiplexed in a single physical resource block for HARQ feedback, and a first predetermined value. This process is similar to that described with reference to blocks 1010-1030 of FIG.

In some embodiments, r may be determined by the following formula.
r=r_1_0+m_Gsession+delta+d_UE (14)
where r_1_0 is the reference starting point and r_1_0 may be equal to n_3_0. m_Gsession is the groupcast session index. delta is a first predetermined value. d_UE=floor(i_UE/R1), where i_UE is the index of the receiving device in the groupcast session and R1 is the number of devices that can be multiplexed in one PRB for ACK feedback. Note that this is an illustrative example only, and the scope of the present disclosure is not limited in this respect.

In this embodiment, terminal device 120 may select resources from a subset of the set of resources sharable among multiple terminal devices to transmit NACKs or ACKs using different sequences. In this way, IBE interference to adjacent PRBs is reduced.

In this embodiment, terminal device 120 determines the sequence for ACK in feedback based on the index of the receiving device and the number of devices that can be multiplexed in a single PRB for HARQ feedback, and The ACK may be sent to the transmitting device using the sequence above. In some embodiments, the cyclic shift of the PSFCH sequence for ACK feedback may be a function of i_UE and R1. For example, the cyclic shift for ACK may be equal to mod(x13*mod(i_UE,R1)+y13,12), where the values of x13 and y13 are configured, preconfigured, or specified , x13 can be 1 and y13 can be 0. Note that this is just an illustrative example and the cyclic shift for ACK can be determined by any other suitable function of i_UE and R1.

Thus, resource allocation for HARQ feedback is made considering HARQ feedback mode, group cast, and the number of devices that can be multiplexed in one PRB for HARQ feedback, and between PSFCHs transmitted in adjacent PRBs. Both IBE interference between PSFCHs transmitted in the same PRB and IBE interference between PSFCHs transmitted in the same PRB can be reduced, and resource allocation can be further improved.

Embodiment 14

In this embodiment, the third mode is determined as HARQ feedback mode and the information is transmitted over the groupcast session. In this case, the determination of resources for ACK feedback is similar to that described with reference to FIG.

In this embodiment, the terminal device 120 determines the groupcast session index associated with the information, and based on the reference starting point configured for the resource, the groupcast session index, and the first predetermined value: A first frequency resource for ACK feedback may be determined. In some embodiments, the predetermined value may be configured by a network device (eg, network device 130) serving the destination device (eg, terminal device 120). In some embodiments, the predetermined value may be determined by a source device (eg, terminal device 110). For example, the predetermined value may be one. Alternatively, the predetermined value may be 0. Note that this is an illustrative example only, and the scope of the disclosure is not limited in this respect.

In some embodiments, m may be determined by the following formula.
r=r_2_0+m_session+delta (15)
where r_2_0 is the reference starting point, and r_2_0 may be equal to n_3_0. m_Gsession is the groupcast session index. delta is a predetermined value. Note that this is an illustrative example only, and the scope of the present disclosure is not limited in this respect.

Other details regarding determining the groupcast session index and determining the reference starting point and predetermined value are similar to those described with reference to FIG. 9, for example, and will not be repeated here.

In this embodiment, terminal device 120 may determine the sequence for ACK feedback based on a configured or pre-configured cyclic shift value. Determining the sequence for ACK feedback is similar to that described with reference to block 430 of FIG. 4, so the details are not repeated here.

Thereby, resource allocation for HARQ feedback is made considering group cast, IBE interference between PSFCHs transmitted in adjacent PRBs can be reduced, and resource allocation can be improved.

Embodiment 15

In this embodiment, the third mode is determined as the HARQ feedback mode, the information is transmitted via the groupcast session, and the PRB index r for feedback is configured or pre-configured. In this embodiment, terminal device 120 determines the sequence for ACK feedback based on the index of the receiving device in the groupcast session, and uses the sequence on resources corresponding to the PRB index for HARQ feedback. , may send ACK feedback to terminal device 110 .

In some embodiments, the cyclic shift of PSFCH resources for ACK feedback may be a function of the receiving device's index i_UE in the groupcast session.

In some embodiments, if receiving device 120 has multiple associated PSFCH PRBs in slot f, receiving device 120 may transmit the PSFCH in only one of the associated PRBs. For example, receiving device 120 may transmit the PSFCH in the PSFCH PRB associated with the most recently received PSCCH/PSSCH in the range [fa, fb], where f is the number of the slot in which the PSFCH is located. and the values of a and b are configured by the network device 130, pre-configured by the device manufacturer, or determined by the terminal device 120. It should be understood that the above examples are merely illustrative without suggesting any limitation on the scope of the present disclosure.

Embodiment 16

In this embodiment, the third mode is determined as HARQ feedback mode and the information is transmitted over the groupcast session. In this embodiment, terminal device 120 may determine the index of the subchannel associated with the received information, eg, the index may be r_PSCCH or r_PSSCH as described below. Terminal device 120 may also determine the first frequency resource based on a reference starting point configured for the resource and the index of the subchannel. This process is similar to that described with reference to block 420 of FIG.

In some embodiments, r may be determined by the following formula.
r=r_4_0+r_PSCCH (16)
or r=r_4_0+r_PSSCH (17)
where r_4_0 is the reference starting point configured for the resource. r_PSCCH is the index of the associated PSCCH sub-channel in sub-channel set S, where S is all sub-channels belonging to the PSSCH resource within the time range [fa, fb]; f is the slot number in which the PSFCH is allocated, and the values of a and b are pre-configured. r_PSSCH is the index of the smallest subchannel of the associated PSSCH in subchannel set S, S is all subchannels belonging to the PSSCH resource within the time range [fa, fb], and f is the number of the slot in which the PSFCH is located, and the values of a and b are configured or pre-configured.

In some embodiments, terminal device 120 may select resources from a subset of a set of resources shareable among multiple terminal devices to transmit NACKs or ACKs using different sequences. In this way, in-band emission (IBE) interference to neighboring PRBs is reduced.

In this embodiment, terminal device 120 determines the sequence for ACK feedback based on the index of the receiving device in the groupcast session, and uses the sequence on resources corresponding to the PRB index for HARQ feedback. , may send ACK feedback to the transmitting device. In some embodiments, the cyclic shift of PSFCH resources for ACK feedback may be a function of the receiving device's index i_UE in the groupcast session. This point is the same as the eleventh embodiment.

According to various embodiments of the present disclosure, if a receiving device needs to feed back HARQ to multiple transmitting devices in a given slot, and the receiving device does not have the ability to feed back all of them, the receiving device A device may prioritize one of them. In some embodiments, the priority may be the one with the highest quality of service (QoS) requirements. In some embodiments, the preferred one may be the one with the highest priority. Thereby, transmission performance can be further improved.

According to various embodiments of the present disclosure, in slots where both PSFCH resources for the first mode and PSFCH resources for the second or third modes are configured, The reference starting points for the PSFCH frequency resources may be separately configured or pre-configured. In some embodiments, a common reference starting point may be configured or pre-configured for those feedback modes, but offsets to the common reference starting point for each feedback mode may be separately configured or Preconfigured.

at least of the HARQ feedback mode, the resources associated with the transmission of the information, the cast type of the sidelink transmission, the transmit power of the receiving device, the number of devices that can be multiplexed in a single PRB for HARQ feedback, and the data type of the information. By considering one, it can be seen that interference between PSFCHs in the same or adjacent PRBs is reduced and resource allocation for HARQ feedback in sidelink transmissions is improved.

Correspondingly, embodiments of the present disclosure also provide a communication method implemented at a transmitting device. FIG. 11 illustrates an exemplary communication method 1100 implemented at a transmitting device according to some embodiments of the present disclosure. For example, method 1100 may be performed at a communication device acting as a transmitting device, such as terminal device 110 . For purposes of explanation, method 1100 is described below with reference to FIG. It should be appreciated that the method 1100 may include additional blocks not shown and/or may omit some blocks shown, and the scope of the disclosure is not limited in this respect.

At block 1110, terminal device 110 may transmit information to a receiving device (eg, terminal device 120). In some embodiments, the information includes PSCCH and/or PSSCH data. In some embodiments, information may be transmitted from transmitting device 110 via at least one of unicast, groupcast, and broadcast. For example, terminal device 110 may transmit information over PSCCH/PSSCH 141 in slot 310, as shown in FIG.

At block 1120, terminal device 110 may receive HARQ feedback for receipt of information from a receiving device (eg, terminal device 120), where the HARQ feedback determines the allocation of resources for HARQ feedback based on the mode of HARQ feedback. Sent on resources determined from the set.
In some embodiments, feedback information is conveyed over PSFCH 142 in the format of a sequence. In some embodiments, the HARQ feedback modes are a first mode in which only NACKs for receipt of information are fed back to the transmitting device, and acknowledgments (ACKs) for receipt of information are fed back to the transmitting device on frequency resources, or a second mode in which a negative acknowledgment (NACK) for receipt of the information is fed back to the transmitting device on the frequency resource and a positive acknowledgment (ACK) for receipt of the information is fed back to the transmitting device on the first frequency resource, or and a third mode in which a negative acknowledgment (NACK) for receipt of information is fed back to the transmitting device on a second frequency resource different from the first frequency resource. Note that the HARQ feedback mode is not limited to the formats described above and may include any other suitable format.

In some embodiments, terminal device 110 may determine the HARQ feedback mode and send an indication of the HARQ feedback mode to terminal device 120 . In some embodiments, terminal device 110 may obtain a set of resources from a network device servicing the transmitting device. In some embodiments, terminal device 110 may divide resources for HARQ feedback into three types.

Type 1 resources are shared by multiple terminal devices to feed back NACKs only. Type 2 resources are shared by multiple terminal devices to send ACKs or NACKs using different sequences. Type 3 resources are used by dedicated terminal devices to send ACKs or NACKs using different sequences.

In some embodiments, terminal device 110 determines the number of resources in a set of resources (i.e., type 2 or 3 resources) that can send ACKs and NACKs in feedback using different sequences, and determines If the number of assigned resources is zero, the HARQ feedback mode may be determined as the first mode. In some embodiments, if the determined number of resources is greater than zero, the HARQ feedback mode can be determined as any of the first to third modes.

In some embodiments, terminal device 110 may determine the HARQ feedback mode for terminal device 120 as the second mode or the third mode if the receiving device is configured with an index within the groupcast session. In some embodiments, terminal device 110 may determine the HARQ feedback mode for terminal device 120 as the first mode if the receiving device is not configured with an index within the groupcast session.

It can be seen that the type of PSFCH frequency resource is taken into account during the HARQ feedback mode decision. In this way, improved resource allocation for HARQ feedback is facilitated.

FIG. 12 is a simplified block diagram of a device 1200 suitable for implementing some embodiments of the present disclosure. Device 1200 may be considered a further exemplary embodiment of terminal device 110 or 120 shown in FIG. Accordingly, device 1200 may be implemented in or as at least part of terminal device 110 or 120 .

As shown, the device 1200 includes a processor 1210, a memory 1220 connected to the processor 1210, a suitable transmitter (TX) and receiver (RX) 1240 connected to the processor 1210, a TX/ and a communication interface connected to the RX1240. Memory 1210 stores at least part of program 1230 . TX/RX 1240 is for two-way communication. TX/RX 1240 has at least one antenna to facilitate communication, but in practice the access nodes referred to herein may have multiple antennas. The communication interface is an X2 interface for bi-directional communication between eNBs, a mobility management entity (MME: Mobility Management Entity) / serving gateway (S-GW: Serving Gateway) S1 interface for communication between the eNB and the eNB Represents any interface required for communication with other network elements, such as the Un interface for communication with a relay node (RN) or the Uu interface for communication between an eNB and a terminal device. good too.

Program 1230 is a program that, when executed by associated processor 1210, enables device 1200 to operate in accordance with embodiments of the present disclosure, as described herein with reference to FIGS. It is assumed to contain instructions. Embodiments herein may be implemented by computer software executable by processor 1210 of device 1200, by hardware, or by a combination of software and hardware. Processor 1210 may be configured to implement various embodiments of the present disclosure. Further, the combination of processor 1210 and memory 1220 may form processing means 1250 suitable for implementing various embodiments of the present disclosure.

Memory 1220 may be of any type suitable for local technology networks, non-limiting examples include non-transitory computer readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, It may be implemented using any suitable data storage technology such as optical memory devices and systems, fixed memory devices and removable memory. Although only one memory 1220 is shown in device 1200, device 1200 may have multiple memory modules that are physically separate. Processor 1210 may be of any type suitable for local technology networks, non-limiting examples include general purpose computers, special purpose computers, microprocessors, DSPs (Digital Signal Processors), and based on multi-core processor architectures. It may include one or more of the processors. Device 1200 may have multiple processors, such as application specific integrated circuit chips that are temporally dependent on a clock that synchronizes the main processor.

In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuitry, 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. Although various aspects of the embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or some other pictorial representations, these blocks, devices, systems, techniques, or techniques described herein. It is understood that the methods may be implemented in hardware, software, firmware, dedicated circuitry or logic, general purpose hardware or controllers or other computing devices, or some combination thereof, as non-limiting examples. want to be

The present disclosure further provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. A computer program product may be a computer-executable device running on a device on a real or virtual processor of interest, such as those contained in program modules, to perform the processes or methods described above with reference to FIGS. Contains possible instructions. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules described in various embodiments. 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 storage media.

Program code to implement the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes 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 the program code is executed by the processor or controller, the flowcharts and/or Alternatively, the functions/operations defined in the block diagram are implemented. The program code may be executed entirely on a machine, partly on a machine, as a stand-alone software package, partly on a machine and partly on a remote machine. , or may run entirely on a remote machine or server.

The program code is embodied in a machine-readable medium, which can be any tangible medium capable of containing or storing a program for use by or in connection with an instruction execution system, apparatus, or device. may be A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections through one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optics, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

Further, although acts have been drawn in a particular order, this does not mean that such acts are performed in the particular order shown, or in any sequential order, or that all depicted actions are performed in order to achieve a desired result. It should not be understood as requiring that an action be performed. Multitasking and parallel processing may be advantageous in certain situations. Similarly, although the above description contains details of certain specific embodiments, these should not be construed as limiting the scope of the disclosure, but rather features specific to the specific embodiments. should be construed as an explanation of Certain features that are described in the context of separate embodiments may 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.

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

Communications in communication system 100 may conform to any suitable standard, where standards include Global System for Mobile Communications (GSM), Long Term Evolution (LTE). , LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA ) , Code Division Multiple Access (CDMA) Access), GSM EDGE Radio Access Network (GERAN), Machine Type Communication (MTC), etc. Further, communication may be performed according to any generation of communication protocols now known or developed in the future. Examples of communication protocols include first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation ( 5G) communication protocols, but are not limited to these.

Claims (38)

A communication method comprising:
receiving, at a receiving device in a sidelink transmission, information from a transmitting device in the sidelink transmission;
determining a mode of hybrid automatic repeat request (HARQ) feedback for receipt of the information;
determining resources for transmission of the feedback from a set of resources for HARQ feedback based on the HARQ feedback mode;
method including. Determining the mode of HARQ feedback includes:
receiving an indication of the HARQ feedback mode from the transmitting device;
receiving an indication of the mode of HARQ feedback from a network device serving the receiving device; and determining as a function of a cast type of the sidelink transmission.
The method of claim 1. Determining the resource includes:
resources associated with the transmission of the information, the cast type of the sidelink transmission, the transmit power of the receiving device, the number of devices that can be multiplexed in a single physical resource block (PRB) for the HARQ feedback; and determining the resource based on at least one of a data type of the information;
The method of claim 1. The HARQ feedback mode is
a first mode in which only negative acknowledgments (NACKs) for receipt of the information are fed back to the transmitting device;
A second mode in which an acknowledgment (ACK) for receipt of the information is fed back to the transmitting device on frequency resources, or a negative acknowledgment (NACK) for receipt of the information is fed back to the transmitting device on the frequency resources. When,
A positive acknowledgment (ACK) for receipt of the information is fed back to the transmitting device on a first frequency resource, or a negative acknowledgment (NACK) for receipt of the information is provided on a second frequency resource different from the first frequency resource. a third mode that is fed back to the transmitting device;
The method of claim 1. Determining the resource includes:
When the first mode is determined as the HARQ feedback mode,
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the resource based on a reference starting point configured for the resource and the index of the subchannel;
5. The method of claim 4. Determining the resource includes:
when the first mode is determined as the mode and the information is transmitted from the transmitting device to the receiving device via a groupcast session;
determining an index of the groupcast session associated with the information;
determining the resource based on a reference starting point configured for the resource and the index of the groupcast session;
5. The method of claim 4. Determining the resource includes:
if an index of physical resource blocks (PRBs) for HARQ feedback is configured or preconfigured, determining the resource based on the index;
The method of claim 1. Determining the resource includes:
When the second mode is determined as the HARQ feedback mode,
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the resource based on a reference starting point configured for the resource and the index;
5. The method of claim 4. Determining the resource includes:
If the second mode is determined as the mode of the HARQ feedback and the transmit power of the receiving device is in a first range, configured for the physical resource block (PRB) index for the HARQ feedback. determining the resource based on a first value; and/or determining the second mode as the mode of the HARQ feedback, and transmitting power of the receiving device different from the first range; if in range, determining the resource based on a second value different from the first value configured for the index of the PRB for the HARQ feedback;
5. The method of claim 4. Determining the resource includes:
when the second mode is determined as the mode of HARQ feedback and the information is transmitted from the transmitting device to the receiving device via a groupcast session;
determining an index of the groupcast session associated with the information;
determining the resource based on a reference starting point configured for the resource, the index of the groupcast session, and a predetermined value;
5. The method of claim 4. determining a sequence for the HARQ feedback based on a configured or pre-configured cyclic shift value;
transmitting the HARQ feedback to the transmitting device using the sequence on the resource;
11. A method according to any one of claims 5-10. Determining the resource includes:
When the second mode is determined as the mode of the HARQ feedback and the number of devices that can be multiplexed in a single physical resource block (PRB) for the HARQ feedback is configured or preconfigured,
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the resource based on a reference starting point configured for the resource, the number of devices that can be multiplexed in a single PRB for HARQ feedback, and the index of the subchannel;
5. The method of claim 4. Determining the resource includes:
the second mode is determined as the mode of the HARQ feedback, the number of devices that can be multiplexed in a single physical resource block (PRB) for HARQ feedback is configured or preconfigured, and the transmit power of the receiving device is in the first range,
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the resource based on a first reference starting point configured for the resource, the index, and the number of devices that can be multiplexed in a single PRB for HARQ feedback; and /or the second mode is determined as the mode of the HARQ feedback, the number of devices that can be multiplexed in a single physical resource block (PRB) for HARQ feedback is configured or preconfigured, and the receiving device when the transmission power is in a second range different from the first range,
Determining a subchannel index associated with the information and being the smallest granularity of time-frequency resources used for transmission of the information;
Determine the resource based on a second reference starting point different from the first starting point configured for the resource, the index, and the number of devices that can be multiplexed in a single PRB for HARQ feedback. to, including
5. The method of claim 4. Based on the index of the subchannel and the number of devices that can be multiplexed in a single PRB for HARQ feedback, a first determining a sequence;
determining a second sequence for the other of ACKs and NACKs in the feedback based on the first sequence and a second predetermined value;
transmitting the HARQ feedback to the transmitting device using the first or second sequence on the resource;
14. A method according to claim 12 or 13. Determining the resource includes:
The second mode is determined as the mode of the HARQ feedback, the number of devices that can be multiplexed in a single physical resource block (PRB) for HARQ feedback is configured or preconfigured, and the information is a groupcast session when transmitted from the transmitting device to the receiving device via
determining an index of the groupcast session associated with the information;
determining an index of the receiving device in the groupcast session;
a reference starting point configured for the resource, the index of the Groupcast session, the index of the receiving device, the number of devices that can be multiplexed in a single PRB for HARQ feedback, and a first predetermined value. determining the resource based on
5. The method of claim 4. A first sequence for one of an acknowledgment (ACK) and a negative acknowledgment (NACK) in the HARQ feedback based on the index of the receiving device and the number of devices that can be multiplexed in a single PRB for HARQ feedback. and
determining a second sequence for the other of ACKs and NACKs in the feedback based on the first sequence and a second predetermined value;
transmitting the HARQ feedback to the transmitting device using the first or second sequence on the resource;
16. The method of claim 15. The second mode is determined as the mode of the HARQ feedback, the physical resource block (PRB) index for the feedback is configured or preconfigured, and the information is received from the transmitting device via a groupcast session. when sent to the receiving device,
determining a sequence for the HARQ feedback based on the index of the receiving device in the groupcast session;
transmitting the HARQ feedback to the transmitting device using the sequence on resources corresponding to the PRB index for the HARQ feedback;
5. The method of claim 4. Determining the resource includes:
when the second mode is determined as the mode of HARQ feedback and the information is transmitted from the transmitting device to the receiving device via a groupcast session;
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the resource based on a reference starting point configured for the resource and the index of the subchannel;
5. The method of claim 4. determining a sequence for the feedback based on the index of the receiving device in the groupcast session;
transmitting the feedback to the transmitting device using the sequence on the resource;
19. The method of claim 18. Determining the resource includes:
When the third mode is determined as the HARQ feedback mode,
determining the first frequency resource for transmission of an acknowledgment (ACK) in the feedback;
determining the second frequency resource for transmission of a negative acknowledgment (NACK) in the feedback;
5. The method of claim 4. Determining the first frequency resource includes:
The third mode is determined as the mode of the HARQ feedback, the number of devices that can be multiplexed in a single physical resource block (PRB) for HARQ feedback is configured or preconfigured, and the information is a groupcast session when transmitted from the transmitting device to the receiving device via
determining an index of the groupcast session associated with the information;
determining an index of the receiving device in the groupcast session;
a reference starting point configured for the resource; the index of the Groupcast session; the index of the receiving device; the number of devices that can be multiplexed in a single physical resource block for HARQ feedback; determining the first frequency resource based on the value;
21. The method of claim 20. determining a sequence for the ACKs in the feedback based on the index of the receiving device and the number of devices that can be multiplexed in a single physical resource block (PRB) for HARQ feedback;
transmitting the ACK to the transmitting device using the sequence on the first frequency resource;
22. The method of claim 21. Determining the first frequency resource includes:
when the third mode is determined as the mode of HARQ feedback and the information is transmitted from the transmitting device to the receiving device via a groupcast session;
determining an index of the groupcast session associated with the information;
determining the first frequency resource based on a reference starting point configured for the resource, the index of the groupcast session, and a predetermined value;
21. The method of claim 20. determining a sequence for the ACKs in the feedback based on a configured or preconfigured cyclic shift value;
transmitting the ACK to the transmitting device using the sequence on the first frequency resource;
24. The method of claim 23. wherein the third mode is determined as the mode of the HARQ feedback, the physical resource block (PRB) index for the feedback is configured or preconfigured, and the information is transmitted from the transmitting device to the receiving device via a groupcast session; when sent to
determining a sequence for the ACK based on the index of the receiving device in the groupcast session;
transmitting the ACK to the transmitting device using the sequence on the first frequency resource corresponding to the index of the PRB for the HARQ feedback;
21. The method of claim 20. Determining the first frequency resource includes:
when the third mode is determined as the mode of HARQ feedback and the information is transmitted from the transmitting device to the receiving device via a groupcast session;
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the first frequency resource based on a reference starting point configured for the resource and the index of the subchannel;
21. The method of claim 20. determining a sequence for the ACK in the feedback based on the index of the receiving device in the groupcast session;
transmitting the ACK to the transmitting device using the sequence on the first frequency resource;
27. The method of claim 26. Determining the second frequency resource includes:
Determining a subchannel index associated with the received information and being the smallest granularity of time-frequency resources used to transmit the information;
determining the second frequency resource based on a reference starting point configured for the resource and the index of the subchannel;
21. The method of claim 20. Determining the second frequency resource includes:
when the information is transmitted from the transmitting device to the receiving device via a groupcast session;
determining an index of the groupcast session associated with the information;
determining the second frequency resource based on a reference starting point configured for the resource and the index of the groupcast session;
21. The method of claim 20. determining a sequence for the NACKs in the feedback based on a configured or preconfigured cyclic shift value;
transmitting the NACK to the transmitting device using the sequence on the second frequency resource;
30. A method according to claim 28 or 29. A communication method comprising:
transmitting information with a transmitting device in a sidelink transmission to a receiving device in the sidelink transmission;
receiving hybrid automatic repeat request (HARQ) feedback for receipt of the information from the receiving device;
the HARQ feedback is transmitted on resources determined from a set of resources for the HARQ feedback based on the HARQ feedback mode;
Method. The HARQ feedback mode is
a first mode in which only negative acknowledgments (NACKs) for receipt of the information are fed back to the transmitting device;
A second mode in which an acknowledgment (ACK) for receipt of the information is fed back to the transmitting device on frequency resources, or a negative acknowledgment (NACK) for receipt of the information is fed back to the transmitting device on the frequency resources. When,
A positive acknowledgment (ACK) for receipt of the information is fed back to the transmitting device on a first frequency resource, or a negative acknowledgment (NACK) for receipt of the information is provided on a second frequency resource different from the first frequency resource. a third mode that is fed back to the transmitting device;
32. The method of claim 31. determining a mode of the HARQ feedback at the transmitting device;
transmitting an indication of the HARQ feedback mode to the receiving device;
33. The method of claim 32. Determining the mode of HARQ feedback includes:
obtaining the set of resources from a network device serving the transmitting device;
determining a number of resources in the set of resources that can transmit positive acknowledgments (ACKs) and negative acknowledgments (NACKs) in the feedback using different sequences;
determining the HARQ feedback mode as the first mode if the determined number of resources is zero;
34. The method of claim 33. a receiving device,
a processor;
a memory coupled to said processor and containing instructions which, when executed by said processor, cause said receiving device to perform the method of any one of claims 1 to 30;
a receiving device. a sending device,
a processor;
a memory coupled to said processor and containing instructions which, when executed by said processor, cause said sending device to perform the method of any one of claims 31 to 34;
A transmitting device, comprising: A computer readable medium storing instructions which, when executed by at least one processor, cause said at least one processor to perform the method of any one of claims 1 to 30. A computer readable medium storing instructions which, when executed by at least one processor, cause said at least one processor to perform the method of any one of claims 31 to 34.

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