RU2801311C2 - Feedback using multiple access signatures - Google Patents

Abstract

FIELD: communications.

SUBSTANCE: invention comprises the following steps: receiving, from another UE, a specific transmission on a specific transmission resource; and transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based, at least in part, on a characteristic of the particular transmission, the feedback resource being associated with a mapping of type many-one control data resources in the feedback resources.

EFFECT: improvement of LTE and NR technologies by achieving a one-to-one mapping between control data resources and feedback resources.

28 cl, 5 dwg

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority from U.S. Provisional Application No. 62/790,805, filed January 10, 2019, entitled "FEEDBACK TRANSMISSION USING MULTIPLE ACCESS SIGNATURES" and U.S. Provisional Application No. 16/737,644, filed 08 January 2020 entitled "FEEDBACK TRANSMISSION USING MULTIPLE ACCESS SIGNATURES", which are expressly incorporated herein by reference.

FIELD OF TECHNOLOGY

[0002] Aspects of the present invention relate generally to wireless communications and to techniques and apparatus for transmitting feedback using multiple access signatures.

BACKGROUND OF THE INVENTION

[0003] Wireless communication systems are widely used to provide various telecommunications services such as telephony, video, data, messaging, and broadcasting. Conventional wireless communication systems may use multiple access technologies capable of providing communication for multiple users by sharing available system resources (eg, bandwidth, transmit power, and/or the like). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA), Synchronous Code Division Multiple Access (TD-SCDMA), and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile communication standard published by the 3rd Generation Partnership Project (3GPP).

[0004] A wireless communications network may include a number of base stations (BS) that may provide communication for a number of user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the link from the BS to the UE, and the uplink (or reverse link) refers to the link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node-B, gNB, access point (AP), radio headunit, transmit-receive point (TRP), New Radio (NR) BS, 5G Node-B, and/or similarly.

[0005] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different user equipments to communicate at a city, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile communications standard published by the 3rd Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, using new spectrum and better integrating with other open standards, using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) ( CP-OFDM) over the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) over the uplink (UL ), as well as support for beamforming, multiple input multiple output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that use these technologies.

SUMMARY OF THE INVENTION

[0006] In some aspects, a wireless communication method that is performed by a user equipment (UE) may include receiving, from another UE, a specific transmission on a specific transmission resource. The method may include transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission.

[0007] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively associated with the memory. The memory and one or more processors may be configured to receive, from another UE, a particular transmission on a particular transmission resource. The memory and one or more processors may be configured to transmit, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission.

[0008] In some aspects, a non-transitory computer-readable storage medium may store one or more instructions for wireless communication. One or more instructions, when executed by one or more UE processors, may cause one or more processors to receive, from another UE, a particular transmission on a particular transmission resource. One or more instructions, when executed by one or more UE processors, may cause one or more processors to transmit, on a feedback resource selected based at least in part on a specific transmission resource, a feedback message using a multiple access signature that is determined based on at least in part characteristics of a particular transmission.

[0009] In some aspects, a device for wireless communication may include means for receiving, from another device, a particular transmission over a particular transmission resource. The apparatus may include means for transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission.

[0010] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable storage medium, user equipment, base station, wireless communication device, and processing system as generally described herein when referred to and as illustrated. through the accompanying drawings and technical description.

[0011] The foregoing has set out the features and technical advantages of the examples according to the invention quite broadly so that the following detailed description can be better understood. Additional features and benefits will be described below. The disclosed concept and specific examples can be easily used as a basis for modification or development of other structures to achieve the same objectives of the present invention. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both their organization and mode of operation, together with the associated benefits, will be better understood from the following description when considered in conjunction with the accompanying figures. Each of the figures is provided for the purpose of illustration and description, and not as a definition of the scope of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to be able to understand in detail the above features of the present invention, a more specific description, summarized above, can be obtained by referring to the aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain exemplary aspects of the present invention and, as such, should not be construed as limiting the scope of the invention, as the description may allow for other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

[0013] FIG. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present invention.

[0014] FIG. 2 is a block diagram conceptually illustrating an example of a base station communicating with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present invention.

[0015] FIG. 3 is a diagram illustrating an example of system wide feedback resources, in accordance with various aspects of the present invention.

[0016] FIG. 4 is a diagram illustrating an example of feedback using multiple access signatures, in accordance with various aspects of the present invention.

[0017] FIG. 5 is a diagram illustrating an exemplary process that is performed by, for example, user equipment, in accordance with various aspects of the present invention.

DETAILED DESCRIPTION

[0018] Various aspects of the invention are described more fully below with reference to the accompanying drawings. However, the invention may be embodied in many other forms and should not be construed as being limited to any particular structure or function presented throughout this disclosure. To the contrary, these aspects are provided so that this disclosure is complete and complete, and fully conveys the scope of the invention to those skilled in the relevant art. Based at least in part on the teachings of this document, one skilled in the art will understand that the scope of the invention is intended to cover any aspect of the invention disclosed herein, whether implemented independently of or in combination with any other aspect of the invention. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the invention is intended to cover such an apparatus or method that is practiced using a different structure, functionality, or structure and functionality in addition to or different from the various aspects of the invention set forth herein. It should be clear that any aspect of the invention disclosed in this document may be embodied by one or more elements of the claims.

[0019] Some aspects of telecommunications systems will now be presented when referring to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by means of various blocks, modules, components, circuits, steps, processes, algorithms and/or the like (collectively referred to as "elements"). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and performance constraints imposed on the overall system.

[0020] It should be noted that while aspects may be described herein using terminology that is commonly associated with 3G and/or 4G wireless technologies, aspects of the present invention may be applied to other generation-based communication systems such as 5G and later, including NR technologies.

[0021] FIG. 1 is a diagram illustrating a wireless network 100 in which aspects of the present invention may be practiced. Wireless network 100 may be an LTE network or some other wireless network such as a 5G or NR network. Wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node-B, gNB, 5G Node-B (NB), access point, transfer point (TRP), and/ or similar. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of a BS and/or a BS subsystem serving that coverage area, depending on the context in which the concept is used.

[0022] The BS may provide communication coverage for a macro cell, pico cell, femto cell, and/or other type of cell. A macro cell may cover a relatively large geographic area (eg, several kilometers in radius) and may provide unrestricted access for a UE with a service subscription. A pico cell may cover a relatively small geographic area and may provide unrestricted access for a UE with a service subscription. A femto cell may cover a relatively small geographic area (eg, a home) and may provide limited access to UEs that have an association with a femto cell (eg, UEs in a Closed Subscriber Group (CSG)). A BS in relation to a macro cell may be referred to as a macro BS. A BS in relation to a pico cell may be referred to as a pico BS. A BS in relation to a femto cell may be referred to as a femto BS or a home BS. In the example shown in FIG. 1, BS 110a may be a macro BS in reference to macro cell 102a, BS 110b may be a pico BS in reference to pico cell 102b, and BS 110c may be a femto BS in reference to femto cell 102c. The BS may provide one or more (eg, three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node-B", "5G NB", and "cell" may be used interchangeably throughout this document.

[0023] In some aspects, the cell may not necessarily be stationary, and the geographic area of the cell may move in accordance with the location of the mobile BS. In some aspects, a BS may be interconnected with one other and/or with one or more other BSs or network nodes (not shown) in the access network 100 via various types of backhaul interfaces such as direct physical connection, virtual network, and/or similar, using any suitable transport network.

[0024] Wireless network 100 may also include relay stations. A relay station is an entity that can receive a data transmission from an upstream station (eg, BS or UE) and send the data transmission to a downstream station (eg, UE or BS). A relay station can also be a UE that can relay transmissions for other UEs. In the example shown in FIG. 1, relay station 110d may communicate with macro BS 110a and UE 120d so as to enable communication between BS 110a and UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.

[0025] The wireless network 100 may be a heterogeneous network that includes BS of different types, such as macro BS, pico BS, femto BS, relay BS, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs may have high transmit power levels (e.g., 5 to 40W), while pico BSs, femto BSs and relay BSs may have lower transmit power levels (eg, 0.1 to 2W).

[0026] The network controller 130 may communicate with a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BS via backhaul. The BSs may also communicate with each other, for example, directly or indirectly via wireless or wired backhaul.

[0027] UE 120 (eg, 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like. The UE may be a cellular phone (e.g., smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local line (WLL) station, a tablet, a camera, a gaming device , netbook, smart laptop, ultrabook, medical device or equipment, biometric sensors/devices, wearable devices (smart wristwatch, smart clothing, smart glasses, smart bracelet, smart jewelry (e.g. smart ring, smart bracelet)), entertainment device ( e.g., music or video device or satellite radio), vehicle component or sensor, smart meters/sensors, industrial manufacturing equipment, global positioning system device, or any other suitable device that is capable of communicating via a wireless or wired medium.

[0028] Some UEs may be considered Machine Type Communications (MTC) or Evolved or Enhanced Machine Type Communications (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, which can communicate with a base station, another device (e.g., a remote device), or some other entity. . A wireless node may provide, for example, connectivity to or with a network (eg, a wide area network such as the Internet or a cellular network) via a wired or wireless link. Some UEs may be considered Internet of Things (IoT) devices and/or may be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs may be considered Customer Installed Equipment (CPE). UE 120 may be enclosed in a housing that houses components of UE 120 such as processor components, memory components, and/or the like.

[0029] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface and/or the like. A frequency may also be referred to as carrier, frequency channel, and/or the like. Each frequency can support one RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0030] In some aspects, two or more UEs 120 (eg, shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (eg, without using base station 110 as an intermediary for communication together). For example, UE 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-various-entity (V2X) communications protocol (e.g., which may include vehicle-to-vehicle communications protocol). means (V2V), vehicle infrastructure communication protocol (V2I) and/or similar), mesh network and/or similar. Here, UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as performed by base station 110. For example, UE 120 may transmit control-data transmissions during control-data resources. , and may send feedback messages as responses to control-data transmissions during feedback resources. In this case, the feedback resources may be periodic system-wide feedback resources with a many-one mapping to control-data resources, as described in more detail herein. For example, the feedback resources may be predefined or preconfigured such that UEs in the network may determine and/or may have stored information identifying the feedback resources to be shared by multiple UEs.

[0031] As noted above, FIG. 1 is provided by way of example only. Other examples may differ from those described with respect to FIG. 1.

[0032] FIG. 2 shows a block diagram of an implementation 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in FIG. 1. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where T≥1 and R≥1 in general.

[0033] At base station 110, transmit processor 220 may receive data from data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs), received from the UE, process (eg, encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (eg, in relation to semi-static resource partitioning information (SRPI) and/or the like) and control information (eg, CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols. and control symbols. TX processor 220 may also generate reference symbols for reference signals (eg, cell-specific reference signal (CRS)) and synchronization signals (eg, primary synchronization signal (PSS) and secondary synchronization signal (SSS)). Multiple input multiple output (MIMO) transmit (TX) processor 230 may perform spatial processing (eg, precoding) on data symbols, control symbols, overhead symbols, and/or reference symbols, if applicable, and may provide T output streams T symbols to modulators 232a to 232t (MOD). Each modulator 232 may process a respective output symbol stream (eg, as applied to OFDM and/or the like) to obtain an output sample stream. Each modulator 232 may further process (eg, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted through T antennas 234a through 234t, respectively. In accordance with various aspects described in more detail below, synchronization signals may be generated with location encoding to carry additional information.

[0034] At UE 120, antennas 252a through 252r may receive downlink signals from base station 110 and/or other base stations and may provide the received signals to demodulators 254a through 254r (DEMOD), respectively. Each demodulator 254 may condition (eg, filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (eg, in the context of OFDM and/or the like) to obtain received symbols. MIMO detector 256 may receive received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols, if applicable, and provide the detected symbols. Receive processor 258 may process (eg, demodulate and decode) the detected symbols, provide decoded data for UE 120 to data receiver 260, and provide decoded control information and system information to controller/processor 280. The channel processor may determine received reference signal strength (RSRP), received signal strength indicator (RSSI), received reference signal quality (RSRQ), signal quality indicator (CQI), and/or the like. In some aspects, one or more components of UE 120 may be enclosed in a housing.

[0035] On the uplink, at UE 120, transmit processor 264 may receive and process data from data source 262 and control information (eg, in relation to reports containing RSRP, RSSI, RSRQ, CQI, and/or the like) from a controller/ processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. Symbols from transmit processor 264 may be precoded by TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (eg, in the context of DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to the base station. 110. At base station 110, uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by MIMO detector 236, if applicable, and further processed by receive processor 238 to obtain decoded data and control information, sent by UE 120. Receive processor 238 may provide decoded data to data receiver 239 and decoded control information to controller/processor 240. Base station 110 may include a communication unit 244 and communicate with network controller 130 via communication unit 244. The network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.

[0036] Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) in FIG. 2 may perform one or more techniques associated with feedback using multiple access signatures, as described in more detail elsewhere in this document. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of FIG. 2 may perform or prescribe operations of, for example, process 500 in FIG. 5 and/or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. Scheduler 246 may schedule the UE for data transmission on the downlink and/or uplink.

[0037] In some aspects, UE 120 may include means for receiving, from another UE, a particular transmission on a particular transmission resource, means for transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message. communications using a multiple access signature that is determined based at least in part on a characteristic of a particular transmission and/or the like. In some aspects, such means may include one or more of the UE components described with respect to FIG. 2.

[0038] As noted above, FIG. 2 is provided as an example only. Other examples may differ from those described with respect to FIG. 2.

[0039] In some communication systems, such as 5G, UEs may communicate with each other using side link communication. For example, in vehicle communication with various entities, the first UE may transmit to the second UE, and the second UE may transmit to the first UE using a distributed channel access mechanism. In a distributed channel access mechanism, UEs may select time resources, frequency resources, and/or the like for communication based at least in part on a decentralized media access control (MAC) protocol and without a central scheduling unit providing scheduling information. When the first UE transmits to the second UE, the second UE may send feedback information such as a hybrid automatic repeat request (HARQ) acknowledgment (ACK) message, a HARQ negative acknowledgment (NACK) message, a channel quality indicator (CQI) message, a a rank indicator (RI), a precoding matrix indicator (PMI) message, and/or the like, as a response for the first UE transmitting to the second UE.

[0040] Feedback resources may be defined to accommodate response messages (eg, HARQ ACK, HARQ NACK, CQI, and/or the like). For example, in one network scenario, a potential feedback resource may be present in each slot. When the potential feedback resource is not required for feedback, the potential feedback resource may be ad hocly used by the UE for control transfer, data transmission, and/or the like. For example, the first UE may determine that the second UEs should not transmit feedback during a particular slot feedback resource (e.g., based at least in part on that no feedback transmissions were transmitted before a particular feedback resource, for which feedback transmission to be transmitted) and may specify the use of a particular feedback resource for non-feedback transmission. Thus, the UE can provide network flexibility and can improve network latency with respect to reserving feedback resources for feedback transmissions only.

[0041] However, the situational use of feedback resources can result in relatively high signaling overhead. For example, frequent switching between transmit and receive modes due to the situational use of feedback resources in each slot can lead to relatively high receiver tuning intervals and problems with signal-to-interference and noise ratio (SINR) variations, which can reduce available resources. Some aspects described herein allow the UE to use system-wide feedback resources that occur periodically, with many-one mapping of control-data resources in the feedback resources based at least in part on the periodicity of the system-wide feedback resources. For example, the UE may use a multiple access scheme to provide a many-one mapping on the feedback resource. Thus, the UE improves the use of the feedback resource with respect to subdivision of the feedback resources and the use of orthogonal low quality of service (QoS) feedback to achieve a one-to-one mapping between the control-data resources and the feedback resources.

[0042] FIG. 3 is a diagram illustrating an example 300 of system-wide feedback resources, in accordance with various aspects of the present invention.

[0043] As shown in FIG. 3, the decentralized MAC scheme may include a channel bandwidth assigned for side link communication between UEs. The channel bandwidth may be divided into a set of channels (eg, channels 1 to 3) such that each includes 10 resource blocks (RBs). Temporary resources may be assigned to a set of slots (eg, slots 1 through 8) with periodic system-wide feedback resources (eg, feedback resources 1 and 2) occurring intermittently between the slot sets.

[0044] If set-to-one mapping is enabled, by way of example, the first set of slots (eg, slots 1 and 2 of channel 1) may be used by the first UE for data transmission (eg, UE-1 Data) and/or transmission controls (for example, c1). In this case, control transmission c1 may initiate a first feedback transmission by another UE using channel 1 feedback resource 1. Also, in slot 3, the second UE may transmit data (e.g., UE-2 Data) and/or control transmission ( e.g., c2) that may initiate a second feedback transmission by another UE using channel 1 feedback resource 1. In this case, the first feedback transmission and the second feedback transmission may be associated with different multiple access signatures, as described in more detail. in this document.

[0045] Similarly, on channel 2, the third UE and the fourth UE may transmit data (eg, UE-3 Data in slot 4 and UE-4 Data in slots 5-7, respectively) and/or control information (eg, c3 and c4, respectively) that can initiate feedback transmissions by other UEs using channel 2 feedback resource 2. 1) in the feedback resources (eg, feedback resource 1 on channel 1), ensure that the UE uses periodic system-wide feedback resources without division of the feedback resources for a one-to-one mapping. Alternatively, the subdivision size can be reduced by using multiple access signatures. For example, feedback resources may be subdivided to map with respect to a subset of control-data resources, and multiple access signatures may allow a subset of control-data resources to be distinguished.

[0046] As noted above, FIG. 3 is provided as an example. Other examples may differ from those described with respect to FIG. 1.

[0047] FIG. 4 is a diagram illustrating an example 400 of feedback using multiple access signatures, in accordance with various aspects of the present invention. As shown in FIG. 4, example 400 includes a first UE 120-1 and a second UE 120-2.

[0048] As further shown in FIG. 4, and through position number 410, the second UE 120-2 may receive a control-data transmission on the first resource from the first UE 120-1. For example, first UE 120-1 may transmit (eg, using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like), and second UE 120-2 may receive a transmission of control- data (eg, using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like). In some aspects, the first UE 120-1 may transmit data transmission in a control-data resource (e.g., one or more channel slots) and may transmit control information in a portion of the control-data resource (e.g., a portion of one or more channel slots that is assigned to transfer control information). In this case, as described above with respect to FIG. 3, the first UE 120-1 may transmit data (eg, UE-1 Data) in slot 1 and slot 2 of channel 1, and may transmit control information (eg, c1) in slot 1 of channel 1.

[0049] As further shown in FIG. 4, and through position number 420, second UE 120-2 may determine the second resource based at least in part on the first resource. For example, second UE 120-2 may determine the second resource using controller/processor 280 and/or the like. For example, second UE 120-2 may determine a feedback resource for transmitting feedback based at least in part on the control-data resource that is used to transmit data and/or control information. In this case, as described above with respect to FIG. 3, the second UE 120-2 may determine that the control information (eg, c1) transmitted in slot 1 of channel 1 is mapped to feedback resource 1 in channel 1. Similarly, the control information (eg, c2) transmitted in slot 3 of channel 1 is mapped to feedback resource 1 in channel 1 (ie, a many-to-one mapping).

[0050] In some aspects, the second UE 120-2 may determine the feedback resource based at least in part on the decoding processing capability of the first UE 120-1, the second UE 120-2, and/or the like. For example, as described above with respect to FIG. 3, based at least in part on the delay in decoding the control-data transmission (e.g., Data UE-3 and c3), the feedback resource for the control-data transmission in channel 2 slot 4 may be channel 2 feedback resource 2, instead of channel 1 feedback resource 1. In other words, the UE may be unable to decode the control-data transmission in a particular slot and transmit the feedback transmission in the feedback resource just after the particular slot. In such a case, the UE may map a control-data transmission in a specific slot to a subsequent feedback resource that occurs a threshold time period after the specific slot to enable decoding.

[0051] In some aspects, the second UE 120-2 may select (eg, using controller/processor 280) a multiple access signature for the feedback message to enable a many-one mapping of control-data resources to feedback resources. For example, the second UE 120-2 may determine the multiple access signature for the feedback message based at least in part on the slot in which the control-data transmission from the first UE 120-1 ends. Thus, the second UE 120-2 is able to distinguish a feedback message sent using a particular feedback resource for a particular control-data transmission from another feedback message sent using the same specific feedback resource but for a different control transfer. -data.

[0052] In other words, as described above with respect to FIG. 3, the UE is able to distinguish the first feedback message using the feedback resource 1 and initiated by the transmission of data and control information in slots 1 and 2 of channel 1 from the second feedback message using the feedback resource 1 and initiated by the transmission of data and control information in the slot. 3 of channel 1. In this case, the first multiple access signature for the first feedback message is determined based at least in part on the slot index y of slot 2, in the second multiple access signature for the second feedback message is determined based at least in part on the slot index y slot 3. In another example, the UE is able to distinguish between control-data resources mapped to a feedback resource division based at least in part on a multiple access signature that is determined.

[0053] In some aspects, the second UE 120-2 may determine the multiple access signature based at least in part on the control-data transmission priority. For example, second UE 120-2 may select a particular multiple access signature to provide higher QoS for high priority control-data transmission feedback over another feedback message from another UE for low priority control-data transmission. In some aspects, the feedback is a one-bit data message (eg, an ACK message or a NACK message). In this case, the multiple access signature may be determined based at least in part on a set of multiple access sequences that are rotated versions of the base sequence, and the rotation may be based at least in part on the slot in which the control transfer ends. data, and frequency of feedback resources.

[0054] As further shown in FIG. 4, and through position number 430, the second UE 120-2 may transmit, using the determined feedback resource, a feedback transmission. For example, second UE 120-2 may transmit a feedback transmission using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like. In some aspects, the second UE 120-2 may transmit a feedback transmission using a selected multiple access signature to encode the feedback transmission (eg, and to identify the control-data transmission that initiated the feedback transmission). Thus, the second UE 120-2 provides a many-one mapping of the control-data resources to the feedback resources, allowing feedback transmissions to be distinguished based on at least partially corresponding initiating control-data transmissions.

[0055] In some aspects, second UE 120-2 may transmit a particular reference signal sequence using a particular subset of time-frequency resources within the feedback resources. For example, second UE 120-2 may determine a particular reference signal sequence and a particular subset of time-frequency resources based on an at least partially selected multiple access signature. In some aspects, the second UE 120-2 may determine a sequence identifier, a time division orthogonal covering code (TD-OCC) parameter, a frequency division orthogonal covering code (FD-OCC) parameter, a cyclic shift, and/or the like for transmitting a reference signal sequence on based at least partially selected multiple access signature. Additionally, or alternatively, second UE 120-2 may determine a sequence identifier (eg, using controller/processor 280), a TD-OCC parameter, an FD-OCC parameter, a cyclic shift, and/or the like based at least in part on the signaling. radio resource control (RRC) configuration (eg, which may be part of a resource pool configuration). In this case, the second UE 120-2 may use the reference signal sequence along with the feedback information modulation (eg, and the first UE 120-1 may use the reference signal sequence to demodulate the feedback information). In some aspects, the second UE 120-2 may transmit the reference signal sequence over resources that are orthogonal to those of the feedback information that is transmitted using the multiple access signature.

[0056] As noted above, FIG. 4 is provided as an example. Other examples may differ from those described with respect to FIG. 4.

[0057] FIG. 5 is a diagram illustrating an exemplary process 500 that is performed by, for example, a UE, in accordance with various aspects of the present invention. Exemplary process 500 is an example in which a UE (eg, UE 120) performs feedback using multiple access signatures.

[0058] As shown in FIG. 5, in some aspects, process 500 may include receiving, from another UE, a particular transmission on a particular transmission resource (block 510). For example, a UE (eg, using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, and/or the like) may receive, from another UE, a particular transmission on a particular transmission resource, as described in more detail above. .

[0059] As shown in FIG. 5, in some aspects, process 500 may include determining a multiple access signature for the feedback message (block 520). For example, the UE (eg, using controller/processor 280 and/or the like) may determine a multiple access signature for the feedback message to enable the feedback message to be identified as corresponding to a particular transmission resource, as described in more detail above.

[0060] As shown in FIG. 5, in some aspects, process 500 may include transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission. (block 530). For example, the UE (eg, using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) may transmit, on a feedback resource selected based at least in part on a specific transmit resource. , a feedback message using a multiple access signature that is determined based at least in part on a characteristic of a particular transmission, as described in more detail above.

[0061] Process 500 may include additional aspects such as any one aspect and/or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

[0062] In a first aspect, the feedback resource is a system-wide periodic feedback resource. In a second aspect, alone or in combination with the first aspect, the feedback may be transmitted using a multiple access signature in a period sub-resource or a system-wide feedback resource. In a third aspect, alone or in combination with one or more of the first and second aspects, a feedback resource is associated with a many-one mapping of control-data resources to feedback resources. In a fourth aspect, alone or in combination with one or more of the first to third aspects, a specific transmission includes control information and payload data. In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the feedback resource is determined based at least in part on the decoding processing capability of the UE. In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, a multiple access signature is determined based at least in part on the slot in which a particular transmission ends and the frequency of the feedback resource.

[0063] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, a multiple access signature is determined based at least in part on a resource pool configuration. In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, a multiple access signature is determined based at least in part on the priority of a particular transmission. In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, a multiple access signature is determined based at least in part on a quality of service parameter. In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, a reference signal sequence and a set of time-frequency resources for the reference signal associated with the feedback message are determined based at least in part on the multiple access signature. In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the UE is configured to determine, for feedback reporting, at least one of a sequence identifier, a time division orthogonal cover code, a frequency division orthogonal cover code separation or cyclic shift. In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, information identifying at least one of candidate sequence identifiers, time division orthogonal cover codes, frequency division orthogonal cover codes, or cyclic shifts is received via signaling. radio resource management resource pool configuration message.

[0064] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, a reference signal is used to demodulate the feedback information of the feedback message. In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the UE may transmit a reference signal for a feedback message using orthogonal resources in parallel with transmitting a feedback message using a multiple access signature. In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the feedback message is a one-bit data message.

[0065] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the feedback message is an acknowledgment message or a negative acknowledgment message. In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the set of possible multiple access sequences is the rotated version of the base sequence. In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the UE is configured to use, for the base sequence cyclic shift version, a cyclic shift determined based at least in part on the slot in which a particular transmission, and feedback resource periodicity.

[0066] Although FIG. 5 shows exemplary blocks of process 500, in some aspects, process 500 may include additional blocks, fewer blocks, different blocks, or differently organized blocks than those depicted in FIG. 5. Additionally, or alternatively, two or more blocks of process 500 may be executed in parallel.

[0067] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be derived from the practice of the aspects.

[0068] For the purposes of this document, the term "component" is understood to be interpreted broadly as hardware, firmware, and/or a combination of hardware and software. For the purposes of this document, a processor is implemented in hardware, firmware, and/or a combination of hardware and software.

[0069] For the purposes of this document, satisfying a threshold may, depending on context, refer to being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to the threshold value and/or similar.

[0070] It will be appreciated that the systems and/or methods described herein may be implemented in various forms of hardware, firmware, and/or a combination of hardware and software. The actual dedicated control hardware or software code that is used to implement these systems and/or methods does not limit the aspects. Thus, the operation and behavior of systems and/or methods have been described herein without reference to specific software code—it is understood that software and hardware may be designed to implement systems and/or methods based at least in part on the description in this document.

[0071] Even though specific combinations of features are listed in the claims and/or disclosed in the technical specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways that, in particular, are not listed in the claims and/or are not disclosed in the technical description. Although each dependent claim below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the set of claims. A phrase that refers to "at least one of" a list of elements refers to any combination of these elements, including individual members. By way of example, "at least one of: a, b, or c" is meant to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiple identical elements (for example, a-a , a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or in any other order a, b and c).

[0072] For the purposes of this document, no element, action, or instruction is to be construed as conclusive or essential unless explicitly described as such. Also, for the purposes of this document, the singular forms are meant to include one or more elements, and may be used interchangeably with the phrase "one or more". In addition, for the purposes of this document, the terms "set" and "group" are meant to include one or more elements (e.g., related elements, unrelated elements, a combination of related and unrelated elements, and/or the like), and can be used interchangeably with the phrase "one or more". Where only one element is implied, the phrase "only one" or similar wording is used. Also, for the purposes of this document, the terms "have", "possess", "possessing" and/or the like are open concepts. In addition, the phrase "based on" is intended to mean "based on at least in part" unless expressly stated otherwise.

Claims (60)

1. A wireless communication method that is performed by a user equipment (UE), comprising the steps of: receive, from another UE, a specific transmission on a specific transmission resource; And transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of a particular transmission, wherein the feedback resource is associated with a many-one mapping of the control data resources to the feedback resources. 2. The method of claim 1, wherein the UE is configured to determine, for the feedback message, at least one of the following: sequence identifier, orthogonal time division covering code, orthogonal frequency division covering code, or cyclic shift. 3. The method of claim 2, wherein information identifying at least one of a candidate sequence identifier, a time division orthogonal cover code, a frequency division orthogonal cover code, or a cyclic shift is received via the radio resource control signaling of the resource pool configuration message. 4. The method of claim 1, wherein the feedback resource is a system-wide periodic feedback resource. 5. The method of claim 1, wherein the particular transmission includes control information and payload data. 6. The method of claim 1, wherein the feedback resource is determined based at least in part on the decoding processing capability of the UE. 7. The method of claim 1, wherein the multiple access signature is determined based at least in part on the slot in which the particular transmission ends and the frequency of the feedback resource. 8. The method of claim 1, wherein the multiple access signature is determined based at least in part on the configuration of the resource pool. 9. The method of claim 1, wherein the multiple access signature is determined based at least in part on the priority of a particular transmission. 10. The method of claim 1, wherein the multiple access signature is determined based at least in part on a quality of service parameter. 11. The method of claim 1, wherein the reference signal sequence and time-frequency resource set for the reference signal associated with the feedback message are determined based at least in part on the multiple access signature. 12. The method of claim 1, wherein the reference signal is used to demodulate the feedback information of the feedback message. 13. The method according to claim 1, further comprising the step of: transmitting a reference signal for the feedback message using the orthogonal resources in parallel with transmitting the feedback message using the multiple access signature. 14. The method of claim 1, wherein the feedback message is a one-bit data message. 15. The method of claim 1, wherein the feedback message is an acknowledgment message or a negative acknowledgment message. 16. The method of claim 1, wherein the set of possible multiple access sequences is the rotated version of the base sequence. 17. The method of claim 16, wherein the UE is configured to use, for the base sequence cyclic shift version, a cyclic shift determined based at least in part on the slot in which the particular transmission ends and the periodicity of the feedback resource. 18. User equipment (UE) for wireless communication, comprising: memory; And one or more processors operatively associated with the memory, wherein the memory and one or more processors are configured to: receiving, from another UE, a specific transmission on a specific transmission resource; And transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of a particular transmission, wherein the feedback resource is associated with a many-one mapping of the control data resources to the feedback resources. 19. The UE of claim 18, wherein the UE is configured to determine, for the feedback message, at least one of the following: sequence identifier, orthogonal time division covering code, orthogonal frequency division covering code, or cyclic shift. 20. The UE of claim 19, wherein information identifying at least one of a candidate sequence identifier, a time division orthogonal cover code, a frequency division orthogonal cover code, or a cyclic shift is received via the radio resource control signaling of the resource pool configuration message. 21. The UE of claim 18, wherein the feedback resource is a system-wide periodic feedback resource. 22. The UE of claim 18, wherein the specific transmission includes control information and payload data. 23. A non-transitory computer-readable storage medium that stores one or more instructions for wireless communication, and one or more instructions containing: one or more instructions which, when executed by one or more user equipment (UE) processors, cause one or more processors to: receive, from the other UE, a specific transmission on a specific transmission resource; And transmit, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission, wherein the feedback resource is associated with a many-one mapping of the control data resources to the feedback resources. 24. The non-transitory computer-readable storage medium of claim 23, wherein the UE is configured to determine, for the feedback message, at least one of the following: sequence identifier, orthogonal time division covering code, orthogonal frequency division covering code, or cyclic shift. 25. The non-temporal computer-readable storage medium of claim 24, wherein information identifying at least one of a candidate sequence identifier, a time division orthogonal cover code, a frequency division orthogonal cover code, or a cyclic shift is received via the radio resource control signaling of the resource pool configuration message. . 26. A device for wireless communication, comprising: means for receiving, from another device, a specific transmission over a specific transmission resource; And means for transmitting, on a feedback resource selected based at least in part on a particular transmission resource, a feedback message using a multiple access signature that is determined based at least in part on a characteristic of the particular transmission, wherein the feedback resource is associated with a many-one mapping of the control data resources to the feedback resources. 27. The apparatus of claim 26, wherein the apparatus is configured to determine, for the feedback message, at least one of the following: sequence identifier, orthogonal time division covering code, orthogonal frequency division covering code, or cyclic shift. 28. The apparatus of claim 27, wherein information identifying at least one of a candidate sequence identifier, a time division orthogonal cover code, a frequency division orthogonal cover code, or a cyclic shift is received via the radio resource control signaling of the resource pool configuration message.