Techniques for user equipment-based relaying for coverage enhancement

Abstract

Methods, systems, and devices for wireless communication are described. A base station can transmit one or more transmissions to a first user equipment (UE) and a second UE, and the one or more transmissions can include a first grant for the first UE and a second grant for the second UE. The first grant can allocate first uplink resources for a source data transmission and first downlink resources for feedback of the base station associated with the source data transmission. The second grant can allocate second uplink resources for a relay data transmission and second downlink resources for feedback of the base station associated with the relay data transmission. The first UE and the relay UE can communicate with the other of the first UE and the second UE, or the base station, or both, based on the first and second grants.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to U.S. Patent Application No. 17 / 480,068, filed September 20, 2021, entitled “TECHNIQUES TO SUPPORT USER EQUIPMENT BASED RELAYING FOR COVERAGE ENHANCEMENT”, which claims the benefit of U.S. Provisional Patent Application No. 63 / 081,450, filed September 22, 2020, entitled “TECHNIQUES TO SUPPORT USER EQUIPMENT BASED RELAYING FOR COVERAGE ENHANCEMENT”, assigned to the assignee of this application, each of which is expressly incorporated herein by reference. Technical Field

[0003] The following relates to wireless communications, including technologies that support user equipment-based relays for coverage enhancement. Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems, such as Long Term Evolution (LTE), LTE-A Advanced (LTE-A), or LTE-A Pro systems, and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication with multiple communication devices, also referred to as User Equipment (UE). Summary of the Invention

[0005] The described technology relates to improved methods, systems, devices, and apparatuses that support techniques for user equipment-based relaying for coverage enhancement. Typically, the described technology provides a base station with resource configuration for a source user equipment (UE) (e.g., a first UE) and a relay UE (e.g., a second UE) to relay communication from the source UE to the base station, for example, via the relay UE. The base station can send one or more transmissions to the relay UE and the source UE, and the one or more transmissions can include a first grant for a first uplink resource set for the source UE and a second grant for a second uplink resource set for the relay UE. The first grant can allocate the first resource set for source data transmission of the source UE. The second grant can allocate the second resource set for relay data transmission of the relay UE. The source UE and the relay UE can communicate with the other of the source UE or relay UEs, or the base station, at least in part based on the first grant or the second grant or both.

[0006] A method for wireless communication at a first UE is described. The method may include receiving from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE, determining that the first grant allocates the first resource set for source data transmission of the first UE, allocating the second resource set for the second UE to relay the source data transmission from the first UE to the base station, and using the first resource set to transmit the source data transmission to the second UE and the base station.

[0007] An apparatus for performing wireless communication at a first UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions, executable by the processor, cause the apparatus to receive from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE; determine that the first grant allocates the first resource set for source data transmission of the first UE; allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and transmit the source data transmission to the second UE and the base station using the first resource set.

[0008] Another apparatus for performing wireless communication at a first UE is described. The apparatus may include components for receiving from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE; components for determining the first grant to allocate the first resource set for source data transmission of the first UE and to allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and components for transmitting the source data transmission to the second UE and the base station using the first resource set.

[0009] A non-transitory computer-readable medium is described, storing code for wireless communication at a first UE. The code may include processor-executable instructions to: receive from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE; determine that the first grant allocates the first resource set for source data transmission of the first UE; allocate the second resource set for the second UE to relay the source data transmission from the first UE to the base station; and transmit the source data transmission to the second UE and the base station using the first resource set.

[0010] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, receiving a transmission may include operations, features, components or instructions for receiving a packet addressed to a first UE that includes downlink control information indicating a first grant and a second grant, wherein determining the first grant and allocating a first resource set and a second resource set may be based on the downlink control information.

[0011] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, receiving a transmission may include operations, features, components or instructions for receiving a first authorized set of resources including sidelink resources and uplink resources, wherein a first UE uses the sidelink resources to communicate with a second UE and uses the uplink resources to communicate with a base station.

[0012] In some examples of the methods, apparatuses and nontransitory computer-readable media described herein, receiving a transmission may include operations, features, components or instructions for receiving a downlink control information message that allocates resources for a second UE to send feedback associated with source data transmission of the first UE or to indicate that the second UE may not be able to participate in communication under a second authorization, wherein communication may be performed based on a transmission by the second UE using the feedback resources.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving from a second UE an instruction that the second UE may not be able to participate in communication under a second authorization, using resources configured by the transmission.

[0014] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving from a second UE an indication of the duration for which the second UE may not be able to participate in relay communication, using resources configured by the transmission.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving feedback associated with source data transmission from a second UE using resources configured by the transmission.

[0016] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving channel information from a second UE using resources configured by transmission, the channel information including indications of transmission precoding matrix indicators, channel state information indications, or combinations thereof.

[0017] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, receiving channel information may include operations, features, components or instructions for receiving channel information having an indication that a second UE may not be able to participate in communication under a second authorization or having feedback associated with source data transmission.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving channel information may include operations, features, components, or instructions for receiving channel information in response to receiving a transmission including a second authorized transmission.

[0019] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for monitoring feedback associated with source data transmission of a first UE using resources configured by the transmission for a base station.

[0020] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include control messages for receiving feedback from a base station activating a first UE to communicate using a first resource set, and operations, features, components, or instructions for monitoring feedback associated with the received control messages and the first downlink resources configured by the transmission for use by the base station for source data transmission with the first UE.

[0021] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein also include operations, features, components, or instructions for receiving control messages for feedback of active source data transmission from a base station, wherein first downlink resources can be monitored based on the received control messages.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving from a base station a downlink control information message indicating that the UE may retransmit source data transmitted to the base station via a second UE or via a first UE, and retransmitting the source data based on the downlink control information message.

[0023] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining that a second UE retransmits source data using a second resource set and for monitoring based on the determination of the second UE retransmitting source data for feedback associated with the source data transmission.

[0024] A method for wireless communication at a second UE is described. The method may include receiving from a base station a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE, determining that the first grant allocates the first resource set for source data transmission of the first UE, allocating the second resource set for the second UE to relay the source data transmission from the first UE to the base station, and communicating with one or more of the first UE or base stations based on the received transmission.

[0025] An apparatus for wireless communication at a second UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions, executable by the processor, cause the apparatus to receive from a base station a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for the second UE; determine that the first grant allocates the first resource set for source data transmission of the first UE; allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and communicate with one or more of the first UE or base stations based on the received transmissions.

[0026] Another apparatus for wireless communication at a second UE is described. The apparatus may include components for receiving from a base station a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE; components for determining the first grant to allocate the first resource set for source data transmission of the first UE and to allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and components for communicating with one or more of the first UE or the base station based on the received transmission.

[0027] A non-transitory computer-readable medium is described, storing code for wireless communication at a second UE. The code may include processor-executable instructions to: receive from a base station a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for the second UE; determine that the first grant allocates the first resource set for source data transmission of the first UE; allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and communicate with one or more of the first UE or base stations based on the received transmission.

[0028] In some examples of the methods, apparatuses, and nontransitory computer-readable media described herein, receiving a transmission includes operations, features, components, or instructions for receiving a packet addressed to a first UE, comprising downlink control information indicating a first grant and a second grant, wherein the second UE determines the second grant and allocates a first resource set and a second resource set based on the downlink control information.

[0029] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, receiving a transmission may include operations, features, components or instructions for receiving a first authorized set of resources including sidelink resources and uplink resources, wherein a second UE uses sidelink resources to receive source data transmission from a first UE, the second UE uses uplink resources to communicate with a base station, or both.

[0030] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving transmission includes operations, features, components, or instructions for receiving a downlink control information message that allocates resources for a second UE to send feedback associated with source data transmission of a first UE or to indicate that the second UE may not be able to participate in communication under a second authorization, wherein the second UE communicates with the first UE or a base station based on the downlink control information message.

[0031] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for using resources configured by the transmission to send instructions that a second UE may not be able to participate in communication under a second authorization.

[0032] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for using resources configured by the transmission to send an indication of the duration for which a second UE may not be able to participate in relay communication.

[0033] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving source data transmission from a first UE using a first resource set and for sending feedback associated with the source data transmission using resources configured by the transmission.

[0034] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for transmitting channel information using resources configured by transmission, including indications of transmission precoding matrix indicators, indications of channel state information, or combinations thereof.

[0035] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, transmitting channel information may include operations, features, components or instructions for transmitting channel information having an indication that a second UE may not be able to participate in communication under a second authorization or having feedback associated with source data transmission.

[0036] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting channel information may include operations, features, components, or instructions for transmitting channel information in response to receiving a transmission including a second license.

[0037] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving feedback associated with source data transmission of a first UE from a base station via resources configured by the transmission, wherein communication may be performed based on the feedback sent by the base station.

[0038] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for suppressing communication under a second license based on feedback indicating that a base station is capable of successfully decoding source data transmission.

[0039] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for communicating under a second authorization based on feedback indicating that a base station cannot successfully decode source data transmission.

[0040] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving source data transmission from a first UE using a first resource set and sending the source data transmission to a base station using a second resource set.

[0041] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for monitoring feedback associated with source data transmission transmitted by a second UE and resources configured by that transmission for a base station, based on the transmission of source data.

[0042] A method for wireless communication is described. The method may include generating a first grant for allocating a first resource set to source data transmission for a first UE, generating a second grant for allocating a second resource set to a second UE, transmitting a transmission including the first and second grants to the first and second UEs, and communicating with one or more of the first or second UEs based on transmitting packets including the first and second grants.

[0043] An apparatus for wireless communication is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to generate a first grant allocating a first resource set for source data transmission of a first UE, generate a second grant allocating a second resource set for a second UE, transmit a transmission including the first and second grants to the first and second UEs, and communicate with one or more of the first or second UEs based on transmitting packets including the first and second grants.

[0044] Another apparatus for wireless communication is described. This apparatus may include components for generating a first grant for allocating a first resource set to source data transmission for a first UE, components for generating a second grant for allocating a second resource set to a second UE, components for transmitting transmissions including the first and second grants to the first and second UEs, and components for communicating with one or more of the first or second UEs based on transmitting packets including the first and second grants.

[0045] A non-transitory computer-readable medium is described, storing code for wireless communication. The code may include processor-executable instructions to generate a first grant allocating a first resource set for source data transmission of a first UE, generate a second grant allocating a second resource set for a second UE, transmit a transmission including the first and second grants to the first and second UEs, and communicate with one or more of the first or second UEs based on transmitting packets including the first and second grants. Attached Figure Description

[0046] Figure 1 An example of a system for wireless communication according to aspects of this disclosure is illustrated, which supports techniques for user equipment-based relays for coverage enhancement.

[0047] Figure 2 An example of a wireless communication system according to aspects of this disclosure is illustrated, which supports techniques for user equipment-based relays for coverage enhancement.

[0048] Figure 3A and Figure 3B The illustration shows an example of resource allocation that supports technologies for coverage enhancement based on user equipment relays, according to aspects of this disclosure.

[0049] Figure 4 An example of a process flowchart illustrating a technology that supports user equipment-based relays for coverage enhancement, according to aspects of this disclosure, is shown.

[0050] Figure 5 and Figure 6A block diagram of an apparatus supporting technologies for coverage enhancement based on user equipment relays is shown, according to aspects of this disclosure.

[0051] Figure 7 A block diagram of a communication manager according to aspects of this disclosure is shown, which supports technologies for user equipment-based relays for coverage enhancement.

[0052] Figure 8 A schematic diagram of a system including devices that support technologies for user equipment-based relays for coverage enhancement, according to aspects of this disclosure, is shown.

[0053] Figure 9 and Figure 10 A block diagram of an apparatus supporting technologies for coverage enhancement based on user equipment relays is shown, according to aspects of this disclosure.

[0054] Figure 11 A block diagram of a communication manager according to aspects of this disclosure is shown, which supports technologies for user equipment-based relays for coverage enhancement.

[0055] Figure 12 A schematic diagram of a system including a device that supports technologies for user equipment-based relays for coverage enhancement, according to aspects of this disclosure, is shown.

[0056] Figures 13 to 15 A flowchart is shown illustrating a method for supporting technologies for coverage enhancement based on user equipment relays, according to aspects of this disclosure. Detailed Implementation

[0057] In some wireless communication scenarios, a base station can send downlink communication to a group of UEs, but one or more UEs may be unable to communicate with the base station due to power limitations, radio link fading, or other constraints. In such cases, a UE can act as a relay UE, relaying uplink communication from the affected UE (which may be called the source UE) to the base station. In this situation, when the source UE cannot effectively communicate with the base station, the relay UE and the source UE can coordinate to configure a dedicated uplink channel to relay data from the source UE to the base station.

[0058] The implementation described herein supports the coordination of resources for relaying. A base station can send a first grant to a source UE and allocate a first resource set, which may include uplink resources of the source UE in addition to corresponding downlink resources used by the base station for feedback of uplink transmissions of the source UE. Furthermore, the base station can send a second grant to a relay UE and allocate a second resource set, which may include uplink resources used by the relay for relaying source uplink transmissions, in addition to downlink resources used by the base station for feedback of uplink transmissions of the relay. Resources can also be allocated to the relay UE for feedback of source transmissions or to indicate that the relay cannot participate in relaying according to the grant. The first and second grants may be sent in the same downlink control information (DCI) message (e.g., group common DCI) or in separate DCI messages.

[0059] Resource configuration allows a base station to receive source transmissions without a relay. In such cases, the base station can send an acknowledgment (ACK), and the resources allocated to the relay UE can be used for other purposes, such as new data. When the relay UE sends a negative acknowledgment (NACK) or the base station sends an ACK associated with the original transmission from the source UE, the resources allocated to the relay grant may not be used. In such cases, the source UE can use the relay grant to send retransmissions or new transmissions, or the base station can use the uplink grant to communicate with other UEs. These options can be configured via control signaling such as Radio Resource Control (RRC) signaling, Medium Access Control-CE (MAC-CE) signaling, or DCI signaling, and the base station can switch between these options via control signaling.

[0060] Specific aspects of the subject matter described herein can be implemented to achieve one or more advantages. The described techniques can support improvements to the uplink communication framework through advantages such as enhanced uplink coverage, reduced signaling overhead, and improved reliability. Therefore, supported techniques can include improved network operation, and in some examples, improved network efficiency, among other benefits.

[0061] The aspects of this disclosure are initially described in the context of wireless communication systems. The aspects of this disclosure are also described with respect to wireless communication systems illustrating relay communication, resource allocation diagrams illustrating relay communication, and process flowcharts. The aspects of this disclosure are shown and described with reference to schematic diagrams of apparatus, system diagrams, and flowcharts related to technologies supporting user equipment-based relays for coverage enhancement.

[0062] Figure 1An example of a wireless communication system 100 according to aspects of this disclosure is illustrated, which supports technologies supporting user equipment-based relay for coverage enhancement. The wireless communication system 100 may include one or more base stations 105, one or more user equipment (UE) 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0063] Base stations 105 can be distributed throughout a geographic area to form a wireless communication system 100, and can be devices of different forms or with different capabilities. Base stations 105 and UE 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110, and UE 115 and base station 105 can establish one or more communication links 125 on the coverage area 110. The coverage area 110 can be an example of a geographic area on which base station 105 and UE 115 can support signal communication according to one or more radio access technologies.

[0064] UE 115 can be distributed throughout the entire coverage area 110 of the wireless communication system 100, and each UE 115 can be fixed or mobile, or both at different times. UE 115 can be devices of different forms or with different capabilities. Figure 1 The diagram illustrates some example UE 115. For example... Figure 1 As shown, the UE 115 described herein may be able to communicate with various types of devices, such as other UE 115s, base station 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices).

[0065] Base station 105 may communicate with core network 130, or with each other, or both. For example, base station 105 may interface with core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). Base station 105 may communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) or both via backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, backhaul link 120 may be or include one or more radio links.

[0066] One or more base stations 105 described herein may include, or may be referred to by those skilled in the art as, base station, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next-generation NodeB or gigabit NodeB (any of which may be referred to as gNB), home NodeB, home eNodeB or other suitable terms.

[0067] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, wherein, among other examples, "device" may also be referred to as a cell, station, terminal, or client. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, etc., which may be implemented in various objects such as equipment, vehicles, and meters.

[0068] like Figure 1 As shown, the UE 115 described herein may be able to communicate with various types of devices, such as other UE 115s that may sometimes act as relays, as well as base station 105 and network devices including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations.

[0069] UE 115 and base station 105 can wirelessly communicate with each other via one or more carriers through one or more communication links 125. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels of a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 can use carrier aggregation or multi-carrier operation to support communication with UE 115. UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation can be used with frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0070] In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. The carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and can be located according to a channel grating for discovery by UE115. The carrier can operate in standalone mode, where UE115 can perform initial acquisition and connection via the carrier, or the carrier can operate in non-standalone mode, where different carriers (e.g., the same or different radio access technologies) are used to anchor the connection.

[0071] The communication link 125 shown in the wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or downlink transmission from base station 105 to UE 115. The carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0072] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth can be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth can be one of several defined bandwidths for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) can have a hardware configuration that supports communication on a specific carrier bandwidth, or can be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured to operate on a portion (e.g., a sub-band, BWP) or the entire carrier bandwidth.

[0073] The signal waveform transmitted on a carrier can consist of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element can consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are negatively correlated. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 may achieve. Wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0074] One or more digital schemes for a carrier can be supported, where the digital scheme may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier can be divided into one or more BWPs with the same or different digital schemes. In some examples, the UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and the communication of the UE 115 can be limited to one or more active BWPs.

[0075] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, which may refer to, for example, the following sampling period: T s =1 / (Δf) max ·N f ) seconds, where Δf max This can represent the maximum supported subcarrier spacing, and N f This can represent the maximum supported Discrete Fourier Transform (DFT) size. The time intervals for communication resources can be organized based on each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0076] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may also be divided into multiple time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include multiple symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, time slots may also be divided into multiple micro-time slots containing one or more symbols. In addition to the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f (Number) sampling periods. The duration of a symbol period can depend on the subcarrier spacing or frequency band of the operation.

[0077] A subframe, time slot, micro-time slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0078] Physical channels can be multiplexed on a carrier using various techniques. For example, one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. The control region of a physical control channel (e.g., a control resource set (CORESET)) can be defined by multiple symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) can be configured for a group of UEs 115. For example, one or more UEs 115 can monitor or search for control regions to obtain control information based on one or more search space sets, and each search space set can include one or more control channel candidates from one or more aggregation levels arranged in a cascaded manner. The aggregation level of control channel candidates can refer to multiple control channel resources (e.g., control channel elements (CCEs)) associated with encoded information having a control information format with a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending information to a particular UE 115.

[0079] Each base station 105 may provide communication coverage via one or more cells, such as macro cells, small cells, hotspots, or other types of cells, or any combination thereof. The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., via a carrier) and may be associated with an identifier used to distinguish neighboring cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors such as the capabilities of base station 105, such cells can range from small areas (e.g., structures, subsets of structures) to large areas. For example, among other examples, a cell may be or include buildings, subsets of buildings, or external space between or overlapping with geographic coverage area 110.

[0080] Macro cells typically cover a relatively large geographical area (e.g., a radius of several kilometers) and can allow UE 115 to have unrestricted access via a service subscription with a network provider that supports macro cells. In contrast, small cells can be associated with a lower-power base station 105 and can operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells can provide unrestricted access to UE 115 with a service subscription with a network provider, or restricted access to UE 115 associated with a small cell (e.g., UE 115 in a Closed Subscriber Group (CSG), or UE 115 associated with a user in a home or office). Base station 105 can support one or more cells and can also support communication on one or more cells using one or more component carriers.

[0081] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access to different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0082] In some examples, base station 105 may be mobile, thus providing communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network, in which different types of base stations 105 use the same or different radio access technologies to provide coverage for various geographic coverage areas 110.

[0083] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and in some examples, transmissions from different base stations 105 can be time-disaligned. The techniques described herein can be used for both synchronous and asynchronous operation.

[0084] Some UE 115 devices, such as MTC or IoT devices, can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices with integrated sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents it to people interacting with the application. Some UE 115 devices can be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

[0085] Some UE 115s can be configured to operate in a power-saving mode, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but not simultaneous transmission and reception). In some examples, half-duplex communication can be performed at a reduced peak rate. Other power-saving techniques for UE 115s include entering a power-efficient deep sleep mode when not engaged in active communication, operating on limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UE 115s can be configured to operate using a narrowband protocol type associated with a defined portion or range (e.g., a subcarrier set or resource block (RB)) within the carrier, within the carrier's guard band, or outside the carrier.

[0086] Wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UE 115 can be designed to support ultra-reliable, low-latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include dedicated communication or group communication and may be supported by one or more mission-critical services, such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include service prioritization, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency are used interchangeably herein.

[0087] In some examples, UE 115 is also able to communicate directly with other UE 115 via device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, a group of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates resource scheduling for D2D communication. In other cases, D2D communication is performed between UE 115s without involving base station 105.

[0088] In some systems, the D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a sidelink communication channel. In some examples, vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles may transmit information related to traffic conditions, signal control, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate via vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105) with roadside infrastructure (such as roadside units), or with the network, or with both.

[0089] Core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity managing access and mobility (e.g., a Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) and at least one user plane entity routing packets or interconnections to external networks (e.g., a Serving Gateway (S-GW), a Packet Data Network (PDN) Gateway (P-GW), or a User Plane Function (UPF)). The control plane entity can manage non-access stratum (NAS) functions of UE 115 served by base station 105 associated with core network 130, such as mobility, authentication, and bearer management. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can connect to one or more network operator IP services 150. IP services 150 may include access to the Internet, intranet(s), IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0090] Some network devices, such as base station 105, may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 through one or more other access network transport entities 145, which may be referred to as a radio head, smart radio head, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., base station 105).

[0091] Wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. The region from 300 MHz to 3 GHz is generally referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength ranges from approximately one decimeter to one meter. UHF waves can be blocked or redirected by buildings and environmental features, but the wave can penetrate structures sufficiently to allow macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the lower frequencies (HF) or very high frequencies (VHF) portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter distances (e.g., less than 100 km).

[0092] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band), or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to greater atmospheric attenuation and shorter distances than SHF or UHF transmissions. The techniques disclosed herein can be used for transmissions across one or more different frequency regions, and the designated use of frequency bands across these frequency regions may vary by country or regulatory body.

[0093] Wireless communication system 100 can utilize licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 can use licensed assisted access (LAA), unlicensed LTE (LTE-U) radio access technology, or NR technology in unlicensed bands such as the 5 GHz Industrial, Scientific, and Medical (ISM) band. When operating in unlicensed radio spectrum bands, devices such as base station 105 and UE 115 can use carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed bands can be based on carrier aggregation configuration and component carriers operating in licensed bands (e.g., LAA). Operation in unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0094] Base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels, which can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be located together at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with multiple rows and columns of antenna ports, which base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, antenna panels may support radio frequency beamforming of signals transmitted via antenna ports.

[0095] Base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such a technique can be called spatial multiplexing. For example, a transmitting device can transmit multiple signals via different antennas or different combinations of antennas. Similarly, a receiving device can receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers can be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) in which multiple spatial layers are transmitted to the same receiving device and multi-user MIMO (MU-MIMO) in which multiple spatial layers are transmitted to multiple devices.

[0096] Beamforming, also known as spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array, such that some signals propagating in a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements can include the transmitting or receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element can be defined by a beamforming weight set associated with a particular orientation (e.g., relative to the antenna array of the transmitting or receiving device, or relative to some other orientation).

[0097] Base station 105 or UE 115 may use beam scanning technology as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by base station 105 in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device such as base station 105 or a receiving device such as UE 115) the beam direction for later transmission or reception by base station 105.

[0098] Some signals, such as data signals associated with a specific receiving device, may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with a receiving device such as UE 115). In some examples, the beam direction associated with transmission along a single beam direction may be determined based on the signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication that UE 115 received a signal with the highest signal quality or other acceptable signal quality.

[0099] In some examples, multiple beam directions can be used to perform transmissions by devices (e.g., base station 105 or UE 115), and the devices can use a combination of digital precoding or radio frequency beamforming to generate combined beams for transmissions (e.g., from base station 105 to UE 115). UE 115 can report feedback indicating precoding weights for one or more beam directions, and this feedback can correspond to the number of beam configurations across the system bandwidth or one or more sub-bands. Base station 105 can transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS)), which can be precoded or unprecoded. UE 115 can provide feedback for beam selection, which can be a precoded matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, or port selection type codebook). Although these techniques are described in reference to the signals transmitted by the base station 105 in one or more directions, the UE 115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to identify the beam direction for subsequent transmission or reception by the UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0100] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105, the receiving device (e.g., UE 115) can attempt multiple receiving configurations (e.g., directional listening). For example, the receiving device can attempt multiple receiving directions by: receiving via different antenna subarrays, processing signals received according to different antenna subarrays, receiving or processing signals received according to different sets of receiving beamforming weights applied to signals received at multiple antenna elements of the antenna array (e.g., different directional listening weight sets), any of which can be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device can use a single receiving configuration to receive along a single beam direction (e.g., when receiving data signals). The single receiving configuration can be aligned in beam directions determined based on listening according to different receiving configuration directions (e.g., based on listening according to multiple beam directions being determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality).

[0101] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer can perform packet segmentation and reassembly for communication over logical channels. The Medium Access Control (MAC) layer can perform priority processing and multiplex logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of RRC connections between the UE 115 and the base station 105 or core network 130 supporting user plane data radio bearers. At the physical layer, transport channels can be mapped to physical channels.

[0102] UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. Hybrid Automatic Repeat Request (HARQ) feedback is a technique used to increase the likelihood of correct data reception over communication link 125. HARQ can include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve MAC layer throughput under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device can support same-slot HARQ feedback, where the device can provide HARQ feedback in a specific time slot for data received in a previous symbol within that time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0103] In some scenarios, base station 105 can transmit downlink communication to a group of UEs 115, but due to power limitations, radio link fading, or certain other constraints, one or more of the UEs may be unable to transmit uplink communication to base station 105. For example, base station 105 may be able to transmit downlink communication to UE 115, which is located further away from the base station relative to other UEs 115 within coverage area 110. However, due to power limitations of UE 115 (e.g., base station 105 can support higher transmit power), and other conditions or constraints, UE 115 may be unable to transmit uplink communication to base station 105, preventing base station 105 from receiving uplink transmissions with sufficient receive power. In some examples, another UE 115 can act as a relay UE, relaying uplink communication from the affected UE 115 to base station 115. In such cases, the relay UE 115 and the affected UE (e.g., the source UE) can coordinate to identify resources for relaying. However, relay coordination between UEs 115 may lead to inefficient resource utilization, channel congestion, etc.

[0104] The implementation described herein supports the coordination of relay communication. A base station can send a first grant and a second grant to one or more UEs 115. The first grant can be assigned to a source UE 115 and can allocate a set of resources (e.g., uplink resources and / or sidelink resources) for source data transmission to the source UE 115. The first grant can also allocate corresponding downlink resources that the base station 105 can use for feedback corresponding to the source data transmission. The second grant can be assigned to a relay UE 115 and can allocate a second set of resources (e.g., uplink and / or sidelink resources) that the relay will use to relay source data transmission from the source UE 115 to the base station 105. The second grant can also allocate corresponding downlink resources that the base station 105 can use for feedback corresponding to the relay data transmission. The second grant can also authorize the relay UE 115 for feedback on the source data transmission or for indicating that the relay UE 115 cannot participate in relay communication according to the second grant. UE 115 and base station 105 can communicate based on the grants.

[0105] Figure 2 An example of a wireless communication system 200 according to aspects of this disclosure is illustrated, which supports techniques for user equipment-based relay for coverage enhancement. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100 or may be implemented by aspects of the wireless communication system 100. The wireless communication system 200 includes UE 115-a, UE 115-b, UE 11-5c and base station 105-a, which may be Figure 1 Example of a corresponding device. Base station 105-a can support communication 205 with UE 115.

[0106] As described herein, base station 105-a can transmit various downlink communications to UE 115. In some scenarios, base station 105-a may be able to transmit downlink communications to UE 115, but UE 115 may not be able to transmit uplink communications to base station 105-a. These scenarios may be due to power constraints or limitations at UE 115, radio link fading, or some other limiting conditions. For example, base station 105-a may be able to transmit downlink transmissions to UE 115-a, but UE 115-a may not be able to transmit uplink communications to base station 105-a due to the distance between UE 115-a and the base station and limitations on the transmit power at UE 115-a. In such cases, another UE (e.g., UE 115-b) can act as a relay UE to relay data transmissions from the affected UE 115-a (e.g., the source UE 115-a) to relay data transmission 210 from the source UE 115-a to base station 105-a. In this scenario, participating UEs 115-a and UE 115-b can coordinate to determine resources for relay data transmission, such as data transmission 210-a from source UE 115-a to base station 105-a via relay UE 115-b. However, coordination of UE 115 may lead to interference with other UEs 115, potentially resulting in inefficient resource utilization.

[0107] The embodiments described herein provide more efficient relay coordination for various devices such as base station 105-a. Base station 105-a can identify relay coordination that can aid uplink communication for UE 115. For example, base station 105-a can determine to coordinate relay communication based on failure to receive feedback associated with downlink communication, failure to decode uplink communication, a reference signal received power (RSRP) below a threshold for uplink communication, a request from UE 115, or any combination thereof. Thus, base station 105-a can generate and send grants to relay UE 115 and source UE 115 that allocates resources for relay communication. In the scenario described herein, the base station can generate and send a first grant for source UE 115-c and a second grant for relay UE 115-b. The grants can specify the appropriate resources (e.g., uplink and / or sidelink resources) that each UE 115 will use for relay communication, and in some cases, specify downlink resources that base station 105-a will use for feedback corresponding to the uplink resources. Authorization (e.g., first authorization, second authorization, or both) may also specify resources (e.g., feedback resources) for relay UE 115-b to provide feedback on source data transmission of source UE 115-a, or indicate that relay UE 115-b cannot participate in relay communication.

[0108] The first and second grants can be indicated in the same downlink control signal. For example, base station 105-a can transmit a physical downlink control channel (PDCCH) with downlink control information (DCI) indicating the first and second grants. Thus, as described further in detail herein, UE 115-a may be able to identify appropriate resources for transmission, monitor feedback resources, and act based on feedback resources. In such a case, the DCI can be a group of common DCIs. In some examples, base station 105-a can use the corresponding grants to transmit individual DCIs. For example, base station 105-a can transmit a first DCI including the first grant to source UE 115-a and a second DCI including the second grant to relay UE 115-b.

[0109] Upon receiving the first grant, source UE 115-b may transmit uplink data transmission 210-a (e.g., source data transmission) in the uplink resources of the first resource set configured by the uplink grant. Source UE 115-b may also transmit source data transmission in the sidelink resources configured by the uplink grant. Relay UE 115-b and base station 105-b may attempt to decode the transmission and send corresponding HARQ-ACK feedback in the appropriate resources. In some cases, base station 105-a may be able to decode source data transmission 210-a without relaying by relay UE 115-b. In other cases, base station 105-a sends a NACK, and relay UE 115-b decodes the source data transmission (e.g., relay data transmission) and retransmits it to the base station as data transmission 210-b. In the event of decoding failure, one or both of relay UE 115-b and source UE 115-a may monitor the feedback from base station 105-a corresponding to the relay data transmission.

[0110] In some cases, relay UE 115-b may be unable to participate in relaying or may otherwise participate in relaying ineffectively. This could be due to low battery status, inability to perform processing because relay UE 115-b is participating in other uplink communications, downlink communications, or relay tasks, or due to channel conditions. In such cases, relay UE 115-b may indicate that it cannot participate in relaying using Hybrid Automatic Repeat Request (HARQ)-ACK Physical Uplink Control Channel (PUCCH) signaling in the feedback resources configured for relay UE 115-a. For example, relay UE 115-b may broadcast a "noParticipation" or "skipRelaying" signal (e.g., indicated by bits or fields in the PUCCH).

[0111] As described in further detail with reference to Figure 3, when relay UE 115-b indicates that it cannot participate, the second uplink grant configured for relay UE 115-b can be used for other purposes. For example, source UE 115-a can use the relay grant to send uplink transmissions, such as new transmissions or retransmissions. In other cases, base station 105-a can cancel the uplink grant and use the resources for other UEs 115. These options can be configured by the base station via RRC, MAC-CE, or in DCI. These options can also be used when the relay UE sends a NACK (instead of an indication that it cannot participate) corresponding to data transmission in the feedback resources, or when base station 105-a indicates that it can decode the source data transmission of source UE 115-b without relaying. In any of these scenarios, the second uplink resources configured by the second grant for relay UE 115-b may not be used for relaying and can therefore be used for other purposes, such as transmissions / retransmissions performed by source UE 115-b or used by other UEs 115.

[0112] It should be understood that the implementation methods described herein can be used to configure relay communication between multiple UEs, such as... Figure 2 As shown, and in other examples. For example, base station 105-a can configure UE 115-a as a source UE for transmitting data transmission 210-a, and UE 115-b as a relay UE for transmitting data transmission 210-b to UE 115-c. Therefore, base station 105-a can also configure UE 115-b as a source UE for transmitting data transmission 210-b (which can be a retransmission of data transmission 210-a), and UE 115-c as a relay UE for transmitting data transmission 210-c. In various examples, UE 115-b can be considered both a relay UE and a source UE, as described herein.

[0113] Figure 3A and Figure 3B An example of resource allocation 300 supporting technologies for coverage enhancement based on user equipment relay, according to aspects of this disclosure, is illustrated. In some examples, resource allocation 300 may be implemented through aspects of wireless communication system 100 and wireless communication system 200. Base station 105 may configure resource allocation in response to determining that the relay UE will relay the uplink transmission of the source UE.

[0114] exist- Figure 3AIn resource allocation 300-a, the base station can send a DCI message 305, which may be an example of a common uplink DCI. The DCI message 305 can be sent using a single UE packet and, in some examples, may include two grants. The DCI message 305 may indicate a grant for a first resource set 310 (e.g., a first uplink resource), which may be an uplink grant for the source UE 115. In some cases, the first grant may be a base station feedback (e.g., a HARQ-ACK feedback) configured with a corresponding downlink resource 315, which corresponds to the source data transmission to be sent in the first uplink resource of the first resource set 310. The DCI may also indicate a feedback resource 320 that the relay UE 115 can use to send feedback on the source data transmission in the first uplink resource, or indicate that the relay UE 115 cannot participate in relaying according to a DCI (e.g., a first or second grant). The second authorization included in DCI message 305 may indicate that the relay UE can use a second resource set 325 (e.g., uplink resources) to relay source data to base station 105 (e.g., relay UE uplink authorization). The second authorization may include an indication that base station 105 can use a second downlink resource corresponding to the second resource set 325 to send feedback.

[0115] In some examples, in addition to uplink resources, the first resource set 310 configured by the first uplink grant may also include sidelink resources. Sidelink resources can be used for source data transmission between the source UE and the relay UE. Therefore, the first resource set may include uplink resources for source data transmission from the source UE to the base station and sidelink resources for source data transmission from the source UE to the relay UE. Depending on the first grant, the uplink and sidelink resources may be overlapping, non-overlapping, consecutive, or configured in other time-domain and / or frequency-domain settings.

[0116] Additionally or alternatively, the second resource set 325 configured by the second grant of DCI message 305 may include sidelink resources in addition to uplink resources. Sidelink resources can be used when a relay UE needs to relay communication with another relay UE to relay communication with a base station. Therefore, the second resource set may include uplink resources for relaying source data transmission from the source UE base station by the relay UE and sidelink resources for relaying source data transmission from the source UE to another relay UE. Depending on the first grant, the uplink and sidelink resources may be overlapping, non-overlapping, consecutive, or in other time-domain and / or frequency-domain configurations.

[0117] DCI message 305 may indicate an offset corresponding to the start of each corresponding resource, an offset between each corresponding resource, or a combination thereof. The offset to the start of each corresponding resource may be relative to DCI message 305. For example, DCI may indicate N1, which indicates an offset from DCI to a first uplink resource of the first resource set, N2, which indicates an offset from DCI to a first downlink resource 315, and so on. Similarly, DCI may indicate a gap between resources. Each offset or N may be a slot duration, a symbol duration, or some other transmission time interval duration.

[0118] Resource configuration can support efficient resource utilization and feedback indication. After receiving DCI message 305, the source UE can transmit source data in t uplink resources of the first resource set 310. As described above, the source UE can also transmit source data in the first sidelink resources of the first resource set 310. The relay UE and base station 105 can attempt to decode the source data and generate feedback corresponding to the source data transmission. The source UE and relay UE can further monitor the first downlink resource 315 for HARQ-ACK feedback from the base station. In some cases, the base station may be able to decode the source data without the relay UE performing relaying. However, in some cases, the base station may send NACK or an indication that it cannot decode the source data. The source UE and base station can monitor feedback resource 320 for feedback from the relay UE or an indication that the relay UE cannot participate in relaying. If the relay UE is able to decode the source data (e.g., the relay UE sends ACK in feedback resource 320), the relay UE can retransmit the source data in the second resource set 325. The relay UE and the source UE can then monitor the second downlink resource 330 for feedback from the base station.

[0119] In some scenarios, relay uplink grants (e.g., second resource set 325) may not be used for relaying. As described herein, if the relay UE cannot participate in relaying, the relay can broadcast a "noParticipation" signal, a "skipRelaying" signal, etc., using HARQ-ACK PUCCH signaling in feedback resource 320. The relay UE may be unable to participate due to low battery status, inability to perform processing, or because the relay UE is busy performing other uplink, downlink, or relay tasks. If the relay cannot participate or sends a NACK in feedback resource 320 (e.g., in the case of decode and forward (DF) relay), or if the base station sends an ACK in first downlink resource 315, the relay UE uplink grant (e.g., second resource set 325) may not be used for relaying. In such cases, the source UE can utilize the relay grant (e.g., second resource set 325) to transmit data. For example, if the base station is able to decode the source data transmission of the first resource set 310 (e.g., cyclic redundancy check (CRC) passes), the source UE can transmit new data. If the base station sends a NACK in the first downlink resource 315, and the relay UE cannot participate or also sends a NACK, the source UE can use the relay UE uplink grant to retransmit the source data transmission. However, in some cases, the base station can cancel the relay UE uplink grant (e.g., the second resource set 325) and reuse these resources for other UEs (e.g., for other communications involving one or more other UEs).

[0120] A relay UE can perform decode-and-forward (DF) relay or amplify-and-forward (AF) relay. As described herein, if the relay UE is performing DF relay and is able to correctly decode the source data transmission (CRC pass), the relay UE can send an ACK in feedback resource 320. If the relay UE is performing DF relay and cannot decode the source data transmission of the first resource set 310 (CRC failure), the relay UE can send a NACK in feedback resource 320. In such a case, as described herein, the source UE can cancel or use a second uplink grant (e.g., second resource set 325) to retransmit the source data transmission (e.g., if the base station sends a NACK in downlink resource 315) or send new data (e.g., the base station sends an ACK in downlink source 315). For AF relay, the base station and the source UE can consider whether the relay UE sends an inability-to-participate indication in feedback resource 320.

[0121] When the second uplink resources may be unused due to the relay UE's inability to participate, the relay UE sending a NACK, and / or the base station sending an ACK, the base station can configure the UE's behavior. When one of these scenarios occurs, the base station can send control signaling to instruct the UE's behavior. For example, the base station can send an RRC or MAC-CE message configuring the source UE's behavior based on one or more of the above scenarios. In other cases, the source UE's behavior is configured in DCI message 305. Furthermore, the base station can dynamically switch UE behavior using RRC or MAC-CE message delivery or by including an indication in the DCI message configuring uplink communication.

[0122] In some examples, HARQ-ACK feedback for relays can be optional to reduce signaling volume. For example, the base station can indicate (e.g., via MAC-CE or RRC signaling) whether the base station and / or relay UE should provide feedback for source data transmission. Thus, if activated, the base station and / or relay UE can provide feedback in configured resources, such as base station feedback resources (e.g., downlink resource 315), base station feedback resources (e.g., second downlink resource 330), and relay UE feedback resources 320.

[0123] As described herein, feedback resource 320 may be used by the relay UE to send feedback associated with source data transmission from the source UE, or to indicate that the relay UE cannot participate in relaying according to the second authorization of DCI message 305. In some cases, the relay UE may include additional information associated with these transmissions. For example, if the relay UE cannot participate, the relay may include a period or duration during which the relay UE cannot participate in relaying to prevent the source UE and the base station from requesting relay transmissions during that period. Additionally or alternatively, the relay UE may include channel information associated with the link between the relay UE and the source UE in feedback resource 320. For example, the relay UE may send a CSI report (e.g., TCQI), a Transport Precoding Matrix Indicator (TPMI), etc. In some cases, the relay UE may generate this report before receiving relay configuration (e.g., DCI message 305) and send it after receiving relay configuration (e.g., DCI information 305). The relay UE may include the duration of non-participation, channel quality information, or both. Channel quality information may also be sent along with feedback on the source data transmission from the source UE.

[0124] exist Figure 3BIn this configuration, resource allocation 300-b includes separate DCIs for the source UE and the relay UE. The first DCI 335 for the source UE includes a first grant allocating a first uplink resource 340 for the source UE to transmit source data transmission and a corresponding first downlink resource 345 for the base station to transmit feedback for the source data transmission. The second DCI 350 for the relay UE includes a second grant allocating a second uplink resource 355 for the relay UE to transmit relay data transmission and a corresponding second downlink resource 360 ​​for the base station to transmit feedback for the relay data transmission. In some examples, using separate DCIs to indicate the first and second grants can provide additional scheduling flexibility compared to including both grants in the DCI. For example, due to channel conditions or other conditions associated with the relay UE, the first DCI can grant resources to the source UE, and then the second DCI can grant resources to the relay UE at a later time. In one example, if the base station has identified that it does not have a direct or appropriate link with the source UE, the first grant indicated by the first DCI may not include the grant for the first downlink resource 345 for feedback. Furthermore, using a single DCI or a separate DCI can support various UE behaviors as described herein. In one example, using a separate DCI can allow a relay UE to avoid the transmission of feedback data from the source data. That is, as... Figure 3B As shown, when using a separate DCI, it is not necessary to allocate [a specific function / method]. Figure 3A The feedback resource shown is 320.

[0125] Figure 4 An example of a process flowchart 400 supporting techniques for coverage enhancement based on user equipment relays according to aspects of this disclosure is illustrated. In some examples, process flowchart 400 may be implemented by aspects of wireless communication system 100. Process flowchart 400 includes base station 105-b, UE 115-d, and UE 115-c, which may be related to... Figure 1 Examples of the corresponding devices shown and described in Figure 3.

[0126] At 405, base station 105-b can determine the relay configuration with one or more UEs 115. For example, base station 105-b can determine the relay configuration based on the inability to decode the transmission of UE 115-c, based on the RSRP of the transmission of UE 115-c, or based on some other condition. The base station can generate a first grant for UE 115-c, which may be an example of a source UE, and a second grant for UE 115d, which may be an example of a relay UE.

[0127] At 410, source UE 115-c can receive one or more transmissions from base station 105-b, which include a first grant of the source UE associated with a first uplink resource and a second grant of the relay UE associated with a second uplink resource. The first grant may include a first resource set (e.g., uplink and / or sidelink resources), and the second grant may include a second resource set (e.g., uplink and / or sidelink resources). Similarly, at 415, relay UE 115-d can receive one or more transmissions from base station 105-b that include a first grant of the source UE and a second grant of the relay UE associated with a second uplink resource. In some cases, the first and second grants are indicated by a common DCI included in packet or PDCCH transmissions at base station 105-b. In other examples, the first grant is sent via a first DCI, and the second grant is indicated via a separate second DCI.

[0128] At 415, source UE 115-c may determine that a first grant allocates a first resource set for source data transmission of the source UE, and in some cases, allocates a first downlink resource for feedback associated with the source data transmission of the base station. At 420, relay UE 115-d may determine that a second grant allocates a second resource set for relay data transmission of the relay UE, and in some cases, allocates a second downlink resource for feedback associated with the relay data transmission of the base station. In some cases, source UE 115-c may identify second uplink resources and second downlink resources configured for relay data transmission and feedback, and relay UE 115-d may identify first uplink resources and first downlink resources configured for source data transmission and feedback. In some examples, the first grant, the second grant, or both may configure relay UE 115-d to use for sending feedback corresponding to the source data transmission, or indicate that relay UE 115-d cannot participate in relay communication feedback resources according to the grant.

[0129] After receiving the grant allocation, source UE 115-c, relay UE 115-d, and base station 105-b can communicate according to the corresponding grant. For example, at 425, source UE 115-c can use the first uplink resource configured by the first grant to send source data transmission. The source data transmission can be received by relay UE 115-d and base station 105-b. At 430, base station 105-b can use the first downlink resource to send feedback associated with the source data transmission. In some examples, base station 105-b can indicate that it can decode the source data transmission by sending an ACK using the first downlink resource. In some examples, among other options, base station 105-b can indicate that it cannot decode the source data transmission by sending a NACK using the first downlink resource.

[0130] If the relay UE is performing DF relay, at 435, the relay UE 115-d can use feedback resources to send feedback corresponding to the source data transmission. In some cases, the relay UE 115-d may include an indication of channel information (e.g., CSI report and / or TPMI) along with the feedback. At 440, the relay UE 115-d may send relay data transmission to the base station 105-b, and the relay data transmission may be a relay of the source data transmission of the source UE 115-e.

[0131] In some examples, a relay UE 115-d may indicate (e.g., in a feedback resource) that it cannot participate in relaying under a second authorization. The relay UE 115-d may also indicate the duration of the inability to participate and channel information (e.g., CSI reports and / or TPMI).

[0132] As described herein, in some cases, the second uplink resources configured by the second authorization may not be used for relay purposes. For example, if relay UE 115-d indicates that it cannot participate in relaying, the second uplink resources may not be used for relay purposes. Similarly, relay UE 115-b may indicate at 435 that it cannot decode the source data transmission, so the second uplink resources may not be used for relay purposes. As another example, the base station may send an ACK at 430, indicating that base station 105-b can successfully decode the source data transmission. Therefore, the second uplink resources may not be used for relay purposes. As described herein, when the second uplink resources may not be used, the source UE may retransmit the source data transmission (based on a NACK from base station 105-b or relay UE 115-d) or send new data (based on an ACK from base station 105-b) among other options. However, in some cases, base station 105-b may use the second uplink resources (and corresponding feedback resources) for other UEs 115, so the source UE 115-e may not use these resources. The behavior of the source UE 115-e can be configured via control signaling from the base station 105-b.

[0133] Figure 5 A block diagram 500 of device 505 according to an aspect of this disclosure is shown. Device 505 supports techniques for supporting user equipment-based relays for coverage enhancement. Device 505 may be an example of an aspect of UE 115 as described herein. Device 505 may include receiver 510, communication manager 515, and transmitter 520. Device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0134] Receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to technologies supporting user equipment-based relays for coverage enhancement). This information can be transmitted to other components of device 505. Receiver 510 can be a reference. Figure 8 Examples of aspects of the transceiver 820 described. The receiver 510 may utilize a single antenna or a set of antennas.

[0135] Communication manager 515 can receive from a base station one or more transmissions including a first grant of a first UE associated with a first uplink resource and a second grant of a second UE associated with a second uplink resource. Communication manager 515 can determine that the first grant allocates a first uplink resource for source data transmission of the first UE and allocates a first downlink resource for feedback of the base station associated with the source data transmission. Communication manager 515 can communicate with one or more of the second UE or base stations based on the first grant of the first UE. Communication manager 515 can also receive from a base station one or more transmissions including a first grant of the first UE associated with a first uplink resource and a second grant of the second UE associated with a second uplink resource. Communication manager 515 can determine that the second grant allocates a second uplink resource for relay data transmission of the second UE and a second downlink resource for feedback of the base station associated with relay data transmission. Communication manager 515 can communicate with one or more of the first UE or base stations based on the second grant. Communication manager 515 may be an example of an aspect of communication manager 810 described herein.

[0136] According to the examples disclosed herein, the communication manager (communication manager) 515 can support wireless communication at the first UE. For example, the communication manager 515 can be configured or otherwise supported to support components for receiving from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE. The communication manager 515 can be configured or otherwise supported to determine the allocation of the first resource set for source data transmission of the first UE and to allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station. The communication manager 515 can be configured or otherwise supported to support components for transmitting source data transmission to the second UE and the base station using the first resource set.

[0137] Additionally or alternatively, according to the examples disclosed herein, the communication manager 515 may support wireless communication at the second UE. For example, the communication manager 515 may be configured or otherwise supported to support components for receiving from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for the second UE. The communication manager 515 may be configured or otherwise supported to determine the allocation of the first resource set for source data transmission of the first UE and to allocate the second resource set for the second UE for relaying the source data transmission from the first UE to the base station. The communication manager (communication manager) 515 may be configured or otherwise supported to support components for communicating with one or more of the first UE or base stations based on received transmissions.

[0138] The communication manager 515 or its sub-components may be implemented as hardware, code (e.g., software or firmware) or any combination thereof executed by a processor. If implemented as code executed by a processor, the functionality of the communication manager 515 or its sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0139] The communication manager 515 or its subcomponents may be physically located in various locations, including being distributed such that a portion of the functionality is implemented by one or more physical components in different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 515 or its subcomponents may be separate and distinct components. In some examples, the communication manager 515 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0140] Transmitter 520 can transmit signals generated by other components of device 505. In some examples, transmitter 520 can be co-located with receiver 510 in a transceiver module. For example, transmitter 520 can be a reference. Figure 8 Examples of aspects of the transceiver 820 described. The transmitter 520 may utilize a single antenna or a set of antennas.

[0141] In some examples, the communication manager 515 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 510 and transmitter 520 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the mobile device modem to enable wireless transmission and reception over one or more frequency bands.

[0142] The communication manager 515 described herein can be implemented to achieve one or more potential advantages. One implementation may allow device 505 to more efficiently transmit uplink communication between device 505 and one or more other devices, and more specifically coordinate relay communication. For example, device 505 may receive one or more authorizations and identify resources for relay communication based on received downlink control signaling.

[0143] Based on the relay mechanism technology described herein, the processor of UE 115 (e.g., as referenced) Figure 8 The control receiver 510, transmitter 520, or transceiver 820 can increase reliability and reduce signaling overhead in relay communication because relay communication can be configured by the base station 105 rather than coordinated between UEs 115.

[0144] Figure 6 A block diagram 600 of device 605 according to an aspect of this disclosure is shown, which supports techniques for supporting user equipment-based relays for coverage enhancement. Device 605 may be an example of an aspect of device 505 or UE 115 as described herein. Device 605 may include receiver 610, communication manager 615, and transmitter 635. Device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0145] Receiver 610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to technologies supporting user equipment-based relays for coverage enhancement). This information can be transmitted to other components of device 605. Receiver 610 can be a reference. Figure 8 Examples of aspects of the transceiver 820 described. The receiver 610 may utilize a single antenna or a set of antennas.

[0146] Communication manager 615 may be an example of an aspect of communication manager 515 as described herein. Communication manager 615 may include authorization interface 620, authorization allocation component 625, and communication interface 630. Communication manager 615 may be an example of an aspect of communication manager 810 described herein.

[0147] The authorization interface 620 can receive from the base station one or more transmissions including a first authorization for a first UE associated with a first uplink resource and a second authorization for a second UE associated with a second uplink resource.

[0148] The authorization allocation component 625 can determine that the first authorization allocates the first uplink resources for the source data transmission of the first UE, and allocates the first downlink resources for the feedback of the base station associated with the source data transmission.

[0149] The communication interface 630 can communicate with one or more of the second UE or base stations based on the first authorization of the first UE.

[0150] The authorization interface 620 can receive from the base station one or more transmissions including a first authorization for a first UE associated with a first uplink resource and a second authorization for a second UE associated with a second uplink resource.

[0151] The authorization allocation component 625 can determine the second authorization allocation for second uplink resources for relay data transmission of the second UE and for second downlink resources for feedback associated with relay data transmission of the base station.

[0152] The communication interface 630 can communicate with one or more of the first UE or base stations based on the second license.

[0153] Transmitter 635 can transmit signals generated by other components of device 605. In some examples, transmitter 635 can be co-located with receiver 610 in a transceiver module. For example, transmitter 635 can be a reference. Figure 8 Examples of aspects of the transceiver 820 described. The transmitter 635 can utilize a single antenna or a set of antennas.

[0154] According to the examples disclosed herein, the communication manager 615 may support wireless communication at the first UE. The licensing interface 620 may be configured or otherwise supported for receiving from the base station a transmission including a first license for a first resource set for the first UE and a second license for a second resource set for the second UE. The license allocation component 625 may be configured or otherwise supported for determining the first license as the source data transmission allocation for the first UE, allocating the first resource set, and allocating the second resource set for the second UE for relaying the source data transmission from the first UE to the base station. The communication interface 630 may be configured or otherwise supported for sending the source data transmission to the second UE and the base station using the first resource set.

[0155] Additionally or alternatively, according to the examples disclosed herein, the communication manager 615 may support wireless communication at the second UE. The licensing interface 620 may be configured or otherwise supported for receiving from the base station a transmission comprising a first license for a first resource set for the first UE and a second license for a second resource set for the second UE. The license allocation component 625 may be configured or otherwise supported for determining the first license as the source data transmission allocation for the first UE, allocating the first resource set, and allocating the second resource set for the second UE for relaying the source data transmission from the first UE to the base station. The communication interface 630 may be configured or otherwise supported for communicating with one or more of the first UE or the base station based on received transmissions.

[0156] Figure 7 A block diagram 700 of a communication manager 705 according to an aspect of this disclosure is shown. The communication manager 705 supports technologies supporting user equipment-based relay for coverage enhancement. The communication manager 705 may be an example of an aspect of the communication manager 515, communication manager 615, or communication manager 810 described herein. The communication manager 705 may include an authorization interface 710, an authorization allocation component 715, a communication interface 720, a packet interface 725, a DCI interface 730, a data transmission component 735, a feedback monitoring component 740, a feedback component 745, a second UE interface 750, a control interface 755, a decoding component 760, and a participation component 765. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0157] The authorization interface 710 can receive from the base station one or more transmissions including a first authorization for a first UE associated with a first uplink resource and a second authorization for a second UE associated with a second uplink resource.

[0158] In some examples, the authorization interface 710 can receive from the base station one or more transmissions including a first authorization of a first UE associated with a first uplink resource and a second authorization of a second UE associated with a second uplink resource.

[0159] The authorization allocation component 715 can determine that the first authorization allocates the first uplink resources for the source data transmission of the first UE, and allocates the first downlink resources for the feedback of the base station associated with the source data transmission.

[0160] In some examples, the authorization allocation component 715 can determine a second authorization allocation for a second uplink resource for relay data transmission of a second UE and a second downlink resource for feedback associated with relay data transmission of a base station.

[0161] In some examples, the authorization allocation component 715 can determine that the second authorization allocates a second uplink resource for the relay data transmission of the second UE and allocates a second downlink resource for the feedback of the base station associated with the relay data transmission, wherein the communication is based on determining that the second authorization allocates the second uplink resource for the relay data transmission of the second UE and allocates the second downlink resource for the feedback of the base station associated with the relay data transmission.

[0162] In some examples, the authorization allocation component 715 may determine that the packet allocation second UE will be used to send feedback associated with the source data transmission, or to indicate that the second UE cannot participate in communication under the second authorization, wherein the communication is performed based on the transmission made by the second UE using the feedback resources.

[0163] In some examples, the authorization allocation component 715 may determine a first authorization allocation for a first uplink resource for source data transmission of a first UE and a first downlink resource for feedback associated with the source data transmission of a base station, wherein communication is based on determining the first authorization allocation for the first uplink resource for source data transmission of the first UE and the first downlink resource for feedback associated with the source data transmission of a base station.

[0164] In some examples, the authorization allocation component 715 may determine that the second authorization allocation will be used by the second UE to send feedback associated with source data transmission or to indicate that the second UE cannot participate in communication according to the second authorization, wherein the communication is based on determining that the second authorization allocation will be used by the second UE to send feedback associated with source data transmission or to indicate that the second UE cannot participate in communication according to the second authorization.

[0165] The communication interface 720 can communicate with one or more of the second UE or base stations based on the first authorization of the first UE.

[0166] In some examples, the communication interface 720 can communicate with one or more of the first UE or base stations based on a second license.

[0167] In some examples, the communication interface 720 can monitor the first uplink resource of the source data transmission sent by the first UE.

[0168] The packet interface 725 can receive packets addressed to a first UE, the packets including downlink control information indicating a first grant and a second grant, wherein the first grant is determined to allocate a first uplink resource, and the first downlink resource is based on the downlink control information.

[0169] In some examples, packet interface 725 can receive packets addressed to a first UE, the packets including downlink control information indicating a first grant and a second grant, wherein the second UE determines the second grant and allocates a second uplink resource and a second downlink resource based on the downlink control information.

[0170] The DCI interface 730 can receive a first downlink control information message indicating a first authorization and a second downlink control information message indicating a second authorization.

[0171] In some examples, the DCI interface 730 can receive a first downlink control information message indicating a first grant and a second downlink control information message indicating a second grant.

[0172] The data transmission component 735 can use the first uplink resource to send source data transmission.

[0173] In some examples, the data transmission component 735 may transmit data using the second uplink resources configured by the second authorization of the second UE based at least in part on the following: feedback sent by the base station using the first downlink resources, an instruction sent by the second UE that the second UE cannot participate in communication according to the second authorization, or any combination thereof.

[0174] In some examples, the data transmission component 735 can retransmit source data transmission based on the base station sending a negative acknowledgment message using first downlink resources.

[0175] In some examples, the data transmission component 735 can send new source data transmission based on the base station sending an acknowledgment message using first downlink resources.

[0176] In some examples, the data transmission component 735 can retransmit the source data transmission by sending a negative acknowledgment message using the first downlink resources based on the second UE.

[0177] In some examples, the data transmission component 735 may suppress the transmission of data transmission using uplink resources configured by the second authorization of the second UE based on: feedback sent by the base station using the first downlink resources, an indication sent by the second UE that the second UE cannot participate in communication according to the second authorization, feedback sent by the second UE and associated with the source data transmission, or any combination thereof.

[0178] In some examples, the data transmission component 735 can use a second uplink resource to retransmit the source data transmission to the base station as relay data transmission by decoding the source data transmission based on the second license.

[0179] The feedback monitoring component 740 can monitor the first downlink resources for feedback from the base station associated with source data transmission based on the first license.

[0180] In some examples, the feedback monitoring component 740 can monitor feedback resources configured by the second authorization for use with feedback associated with the source transmission or for indications that the second UE cannot participate in communication according to the second authorization sent by the second UE.

[0181] Feedback component 745 can use first downlink resources to receive feedback associated with source data transmission from base station, wherein data transmission using second uplink resources is based on the received feedback.

[0182] In some examples, the feedback component 745 can use feedback resources configured by the second authorization to receive feedback associated with the source data transmission from the second UE, wherein the data transmission using the second uplink resources is based on the received feedback.

[0183] In some examples, the feedback component 745 can monitor downlink resources configured by the first authorization for feedback from the base station associated with source data transmission, wherein communication is performed based on the feedback sent by the base station.

[0184] In some examples, the feedback component 745 may use a feedback resource indicated by a second authorization to send feedback, wherein the feedback indicates an attempt to decode the result of the source data transmission.

[0185] The second UE interface 750 can use the feedback resources configured by the second authorization to receive from the second UE an indication that the second UE cannot participate in communication according to the second authorization, wherein the transmission of data using the second uplink resources is based on the received indication.

[0186] The control interface 755 can receive control messages from the base station, which include an indication of whether the first UE will use resources configured by the second authorization for data transmission based on feedback sent by the base station using the first downlink resources, an indication sent by the second UE that the second UE cannot participate in communication according to the second authorization, feedback sent by the second UE, or any combination thereof, wherein communication is based on receiving the control messages.

[0187] In some cases, control messages include Media Access Control (MAC) layer control element messages and Radio Resource Control (RRC) messages.

[0188] In some cases, the indication is included in one or more transmissions of downlink control information.

[0189] The decoding component 760 can suppress attempts to decode the source data transmission based on feedback indicating that the base station can successfully decode the source data transmission.

[0190] In some examples, the decoding component 760 may attempt to decode the source data transmission based on feedback indicating that the base station cannot successfully decode the source data transmission.

[0191] In some examples, the decoding component 760 may attempt to decode the source data transmission based on monitoring.

[0192] The participating component 765 can use the feedback resources configured by the second authorization to send an indication to the base station and the first UE that the second UE cannot participate in communication according to the second authorization.

[0193] Figure 8 A schematic diagram of a system 800 including device 805 according to aspects of this disclosure is shown. Device 805 supports technologies supporting user equipment-based relay for coverage enhancement. Device 805 may be an example of or include components of device 505, device 605, or UE 115 as described herein. Device 805 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 810, an I / O controller 815, a transceiver 820, an antenna 825, a memory 830, and a processor 840. These components may communicate electronically via one or more buses (e.g., bus 845).

[0194] Communication manager 810 can receive from a base station one or more transmissions including a first grant of a first UE associated with a first uplink resource and a second grant of a second UE associated with a second uplink resource. Communication manager 810 can determine that the first grant allocates first uplink resources for source data transmission of the first UE and allocates first downlink resources for feedback of the base station associated with the source data transmission. Communication manager 810 can communicate with one or more of the second UE or base stations based on the first grant of the first UE. Communication manager 810 can also receive from a base station one or more transmissions including a first grant of a first UE associated with a first uplink resource and a second grant of a second UE associated with a second uplink resource. Communication manager 810 can determine that the second grant allocates second uplink resources for relay data transmission of the second UE and second downlink resources for feedback of the base station associated with relay data transmission. Communication manager 810 can communicate with one or more of the first UE or base stations based on the second grant.

[0195] The I / O controller 815 can manage the input and output signals of the device 805. The I / O controller 815 can also manage peripheral devices not integrated into the device 805. In some cases, the I / O controller 815 can represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 815 can utilize, for example... Or other known operating systems. In other cases, I / O controller 815 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, I / O controller 815 may be implemented as part of a processor. In some cases, a user may interact with device 805 via I / O controller 815 or hardware components controlled by I / O controller 815.

[0196] Transceiver 820 can communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, transceiver 820 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 820 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0197] In some cases, a wireless device may include a single antenna 825. However, in other cases, a device may have more than one antenna 825, which may be able to transmit or receive multiple wireless transmissions simultaneously.

[0198] Memory 830 may include RAM and ROM. Memory 830 may store computer-readable, computer-executable code 835, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, among others, memory 830 may include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0199] Processor 840 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 840 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 840. Processor 840 may be configured to execute computer-readable instructions stored in memory (e.g., memory 830) to cause device 805 to perform various functions (e.g., supporting functions or tasks that support technologies for overlay-enhanced user equipment-based relays).

[0200] Code 835 may include instructions for implementing aspects of this disclosure, including instructions for supporting wireless communication. Code 835 may be stored in a non-transitory computer-readable medium such as system memory or other types of memory. In some cases, code 835 may not be executed directly by processor 840, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0201] Figure 9 A block diagram 900 of a device 905 according to an aspect of this disclosure is shown. Device 905 supports techniques for user equipment-based relays for coverage enhancement. Device 905 may be an example of an aspect of base station 105 as described herein. Device 905 may include a receiver 910, a communication manager 915, and a transmitter 920. Device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0202] Receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to technologies supporting user equipment-based relays for coverage enhancement). This information can be transmitted to other components of device 905. Receiver 910 can be a reference. Figure 12 Examples of aspects of the transceiver 1220 described. The receiver 910 may utilize a single antenna or a set of antennas.

[0203] Communication manager 915 can generate a first grant that allocates a first uplink resource for source data transmission of a first UE and allocates a first downlink resource for feedback from a base station associated with the source data transmission. Communication manager 915 can generate a second grant that allocates a second uplink resource for relay data transmission of a second UE and allocates a second downlink resource for feedback from a base station associated with the relay data transmission. Communication manager 915 can send the first grant to the first UE and the second grant to the second UE. Communication manager 915 can communicate with one or more of the first or second UE by sending packets including the first and second grants. Communication manager 915 may be an example of an aspect of communication manager 1210 described herein.

[0204] The communication manager 915 may support wireless communications according to the examples disclosed herein. For example, the communication manager 915 may be configured or otherwise support components for generating a first grant that allocates a first resource set for source data transmission of a first UE. The communication manager 915 may be configured or otherwise support components for generating a second grant that allocates a second resource set for a second UE. The communication manager 915 may be configured or otherwise support components for transmitting transmissions including the first and second grants to the first and second UEs. The communication manager 915 may be configured or otherwise support components for communicating with one or more of the first or second UEs based on transmitting packets including the first and second grants.

[0205] The communication manager 915 or its sub-components may be implemented in hardware, code (e.g., software or firmware), or any combination thereof executed by a processor. If implemented in code executed by a processor, the functionality of the communication manager 915 or its sub-components may be performed by a general-purpose processor, DSP, application-specific integrated circuit (ASIC), FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0206] The communication manager 915 or its subcomponents may be physically located in various locations, including being distributed such that a portion of the functionality is implemented by one or more physical components in different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 915 or its subcomponents may be separate and distinct components. In some examples, the communication manager 915 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0207] Transmitter 920 can transmit signals generated by other components of device 905. In some examples, transmitter 920 can be co-located with receiver 910 in a transceiver module. For example, transmitter 920 can be a reference. Figure 12 Examples of aspects of the transceiver 1220 described. The transmitter 920 may utilize a single antenna or a set of antennas.

[0208] Figure 10 A block diagram 1000 of device 1005 according to an aspect of this disclosure is shown. Device 1005 supports techniques for user equipment-based relays for coverage enhancement. Device 1005 may be an example of an aspect of device 905 or base station 105 described herein. Device 1005 may include receiver 1010, communication manager 1015, and transmitter 1040. Device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0209] Receiver 1010 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to technologies supporting user equipment-based relays for coverage enhancement). Receiver 1010 can be a reference. Figure 12 Examples of aspects of the transceiver 1220 described. The receiver 1010 may utilize a single antenna or a set of antennas.

[0210] Communication manager 1015 may be an example of an aspect of communication manager 915 as described herein. Communication manager 1015 may include source authorization component 1020, relay authorization component 1025, authorization interface 1030, and communication interface 1035. Communication manager 1015 may be an example of an aspect of communication manager 1210 described herein.

[0211] The source granting component 1020 can generate a first grant for allocating a first uplink resource for the source data transmission of the first UE and for allocating a first downlink resource for the feedback of the base station associated with the source data transmission.

[0212] The relay granting component 1025 can generate a second grant that allocates a second uplink resource for relay data transmission of the second UE and allocates a second downlink resource for feedback of the base station associated with relay data transmission.

[0213] The authorization interface 1030 can send a first authorization to the first UE and a second authorization to the second UE.

[0214] The communication interface 1035 can communicate with one or more of the first UE or the second UE by sending packets including a first authorization and a second authorization.

[0215] Transmitter 1040 can transmit signals generated by other components of device 1005. In some examples, transmitter 1040 can be co-located with receiver 1010 in a transceiver module. For example, transmitter 1040 can be a reference... Figure 12 Examples of aspects of the transceiver 1220 described. The transmitter 1040 may utilize a single antenna or a set of antennas.

[0216] Figure 11 A block diagram 1100 of a communication manager 1105 according to an aspect of this disclosure is shown. The communication manager 1105 supports techniques for user equipment-based relays for coverage enhancement. The communication manager 1105 may be an example of an aspect of the communication manager 915, communication manager 1015, or communication manager 1210 described herein. The communication manager 1105 may include a source granting component 1110, a relay granting component 1115, a granting interface 1120, a communication interface 1125, a second UE interface 1130, a packet interface 1135, a DCI interface 1140, a resource monitoring component 1145, a control interface 1150, and a participation component 1155. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses). The source granting component 1110 may generate a first grant to allocate a first uplink resource for source data transmission of a first UE and to allocate a first downlink resource for feedback from a base station associated with the source data transmission.

[0217] The relay granting component 1115 can allocate a second uplink resource for the relay data transmission of the second UE and allocate a second grant of a second downlink resource for the feedback of the base station associated with the relay data transmission.

[0218] The authorization interface 1120 can send a first authorization to the first UE and a second authorization to the second UE.

[0219] The communication interface 1125 can communicate with one or more of the first UE or the second UE by sending packets including a first authorization and a second authorization.

[0220] In some cases, data transmission is a retransmission of the source data based on feedback indicating that the base station cannot decode the source data.

[0221] In some cases, data transmission is based on a new source data transmission that is sent in response to a feedback indicating that the base station is able to decode the source data transmission.

[0222] The second UE interface 1130 can generate a second authorization that allocates resources to the second UE for sending feedback associated with source data transmission or for indicating that the second UE cannot participate in communication according to the second authorization, wherein communication is performed based on transmissions made by the second UE using the feedback resources.

[0223] In some examples, the second UE interface 1130 can use feedback resources configured by the second authorization to receive from the second UE an indication that the second UE cannot participate in communication based on the second authorization.

[0224] Packet interface 1135 can send packets addressed to the first UE and including downlink control information indicating the first and second authorizations.

[0225] DCI interface 1140 can send a first downlink control information message, including a first authorization, to the first UE.

[0226] In some examples, the DCI interface 1140 can send a second downlink control information message, including a second authorization, to the second UE.

[0227] In some examples, DCI interface 1140 can send a third grant to a third UE, which allocates a second uplink resource to the third UE based on receiving the instruction.

[0228] Resource monitoring component 1145 can monitor the transmission of source data transmitted by the first UE using the first uplink resource based on the first authorization.

[0229] In some examples, the resource monitoring component 1145 can send feedback associated with source data transmission by using the first downlink resources based on first authorized monitoring.

[0230] In some examples, the resource monitoring component 1145 can monitor the second uplink resources used for retransmission of source data by the second UE based on feedback indicating that the base station cannot decode the source data transmission.

[0231] In some examples, the resource monitoring component 1145 can monitor the second uplink resources used for data transmission of the first UE based on the feedback sent.

[0232] In some examples, the resource monitoring component 1145 can monitor a second uplink resource for data transmission for a first UE based on a received indication.

[0233] The control interface 1150 can send a control message to the first UE, which includes the following: an indication of whether the first UE will use the second uplink resources configured by the second authorization to transmit data based on feedback sent by the base station using the first downlink resources; an indication sent by the second UE that the second UE cannot participate in communication according to the second authorization; feedback sent by the second UE; or any combination thereof.

[0234] In some cases, control messages include Media Access Control (MAC) layer control element messages and Radio Resource Control (RRC) messages. In other cases, this indication is included in the downlink control information of the packet.

[0235] Participating component 1155 can receive from the second UE an indication that the second UE cannot participate in communication according to the second authorization or feedback that the second UE cannot decode the source data transmission.

[0236] Figure 12 A schematic diagram of a system 1200 including device 1205 according to aspects of this disclosure is shown. Device 1205 supports technologies supporting user equipment-based relay for coverage enhancement. Device 1205 may be an example of or include components of device 905, device 1005, or base station 105 as described herein. Device 1205 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 1210, a network communication manager 1215, a transceiver 1220, an antenna 1225, a memory 1230, a processor 1240, and an inter-site communication manager 1245. These components may communicate electronically via one or more buses (e.g., bus 1250).

[0237] Communication manager 1210 can generate a first grant to allocate a first uplink resource for source data transmission of a first UE and to allocate a first downlink resource for feedback of the base station associated with the source data transmission. Communication manager 1210 can generate a second grant to allocate a second uplink resource for relay data transmission of a second UE and to allocate a second downlink resource for feedback of the base station associated with the relay data transmission. Communication manager 1210 can send the first grant to the first UE and the second grant to the second UE. Communication manager 1210 can communicate with one or more of the first or second UE by sending packets including the first and second grants.

[0238] The network communication manager 1215 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1215 can manage the transmission of data communication by client devices (such as one or more UEs 115).

[0239] Transceiver 1220 can communicate bidirectionally via one or more antennas, wired or wireless links, as described herein. For example, transceiver 1220 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1220 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0240] In some cases, a wireless device may include a single antenna 1225. However, in other cases, the device may have more than one antenna 1225, which may be able to transmit or receive multiple wireless transmissions simultaneously.

[0241] Memory 1230 may include RAM, ROM, or a combination thereof. Memory 1230 may store computer-readable code 1235 including instructions that, when executed by a processor (e.g., processor 1240), cause the device to perform the various functions described herein. In some cases, memory 1230 may include a BIOS or similar component that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0242] Processor 1240 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1240 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1240. Processor 1240 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1230) to cause device 1205 to perform various functions (e.g., supporting functions or tasks for technologies used to cover enhanced user equipment-based relays).

[0243] Inter-site communication manager 1245 can manage communication with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 1245 can coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, inter-site communication manager 1245 may provide an X2 interface within LTE / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0244] Code 1235 may include instructions for implementing aspects of this disclosure, including instructions for supporting wireless communication. Code 1235 may be stored in a non-transitory computer-readable medium such as system memory or other types of memory. In some cases, code 1235 may not be executed directly by processor 1240, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0245] Figure 13 A flowchart illustrating method 1300 according to an aspect of this disclosure is shown, which supports techniques for user equipment-based relays for coverage enhancement. Operation of method 1300 can be implemented by UE 115 or its components, as described herein. For example, operation of method 1300 can be performed by a communications manager, as referenced... Figures 5 to 8 As described herein. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0246] At 1305, the method may include receiving a transmission from a base station, the transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE. Operation of 1305 may be performed according to the examples disclosed herein. In some examples, aspects of operation of 1305 may be provided by reference to [reference needed]. Figure 7The described authorization interface 710 is used for execution.

[0247] At 1310, the method may include determining that a first resource set is allocated for source data transmission of the first UE, and allocating a second resource set for the second UE to relay the source data transmission from the first UE to the base station. The operation of 1310 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1310 may be as described in the references... Figure 7 The described authorization allocation component 715 is executed.

[0248] At 1315, the method may include sending source data transmission to the second UE and the base station using a first resource set. The operation of 1315 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1315 may be as described in the references... Figure 7 The described communication interface 720 is used for execution.

[0249] Figure 14 A flowchart illustrating method 1400 according to an aspect of this disclosure is shown. Method 1400 supports techniques for user equipment-based relays for coverage enhancement. Operation of method 1400 can be implemented by UE 115 or its components, as described herein. For example, operation of method 1400 can be performed by a communications manager, as referenced... Figures 5 to 8 As described herein. In some examples, the UE can execute a set of instructions to control the UE's functional elements to perform the functions described herein. Additionally or alternatively, the UE can use dedicated hardware to perform aspects of the functions described herein.

[0250] At 1405, the method may include receiving from the base station a transmission comprising a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE. Operation at 1405 may be performed according to the examples disclosed herein. In some examples, aspects of operation at 1405 may be provided by reference to [reference needed]. Figure 7 The described authorization interface 710 is used for execution.

[0251] At 1410, the method may include determining that a first resource set is allocated for source data transmission of the first UE, and allocating a second resource set for the second UE to relay the source data transmission from the first UE to the base station. The operation of 1410 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1410 may be as described in reference... Figure 7 The authorization allocation component 715 is executed.

[0252] At 1415, the method may include communicating with one or more of the first UE or base stations based on the received transmission. Operation at 1415 can be performed according to the examples disclosed herein. In some examples, aspects of operation at 1415 may be provided by reference to [reference needed]. Figure 7 The described communication interface 720 is executed.

[0253] Figure 15 A flowchart illustrating method 1500 according to an aspect of this disclosure is shown. Method 1500 supports techniques for user equipment-based relay for coverage enhancement. Operation of method 1500 may be implemented by base station 105 or its components, as described herein. For example, operation of method 1500 may be performed by a communication manager, as referenced... Figures 9 to 12 As described herein. In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the functions described herein. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the functions described herein.

[0254] At 1505, the method may include generating a first grant for allocating a first resource set for source data transmission of the first UE. The operation of 1505 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1505 may be derived from references... Figure 11 The source authorization component 1110 described is executed.

[0255] At 1510, the method may include generating a second authorization to allocate a second set of resources for the second UE. The operation of 1510 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1510 may be derived from, as referenced... Figure 11 The described relay authorization component 1130 is executed.

[0256] At point 1515, the method may include sending a transmission including a first grant and a second grant to a first UE and a second UE. The operation of point 1515 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of point 1515 may be as described in the references... Figure 11 The described authorization interface 1120 is executed.

[0257] At 1520, the method may include communicating with one or more of the first UE or the second UE based on sending a packet including a first authorization and a second authorization. The operation of 1520 can be performed according to the examples disclosed herein. In some examples, aspects of the operation of 1520 may be as described in the references... Figure 11 The communication interface 1125 is executed.

[0258] Aspect 1: A method for performing wireless communication at a first UE, comprising: receiving from a base station a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for a second UE; determining that the first grant allocates the first resource set for source data transmission of the first UE, and allocating the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and transmitting the source data transmission to the second UE and the base station using the first resource set.

[0259] Aspect 2: According to the method of aspect 1, receiving the transmission includes: receiving a packet addressed to a first UE including downlink control information indicating a first grant and a second grant, wherein determining the first grant allocation of a first resource set and a second resource set is at least partially based on the downlink control information.

[0260] Aspect 3: The method according to any one of Aspects 1 to 2, wherein receiving the transmission includes: receiving a first grant for a first resource set including sidelink resources and uplink resources, wherein the first UE uses the sidelink resources to communicate with the second UE and uses the uplink resources to communicate with the base station.

[0261] Aspect 4: The method according to any one of Aspects 1 to 3, wherein receiving the transmission includes: receiving a downlink control information message, the downlink control information message allocating resources for the second UE to send feedback associated with the source data transmission of the first UE or to indicate that the second UE cannot participate in communication under the second authorization, wherein the communication is performed at least in part based on the transmission of the second UE using the feedback resources.

[0262] Aspect 5: The method according to any one of aspects 1 to 4 further includes: using resources configured by transmission to receive from the second UE an indication that the second UE cannot participate in communication under the second authorization.

[0263] Aspect 6: The method according to any one of aspects 1 to 5 further includes: receiving from the second UE an indication of the duration during which the second UE cannot participate in relay communication using resources configured by the transmission.

[0264] Aspect 7: The method according to any one of aspects 1 to 4 further includes: receiving feedback associated with the source data transmission from the second UE using resources configured by the transmission.

[0265] Aspect 8: The method according to any one of aspects 1 to 7 further includes: receiving channel information from a second UE using resources configured by transmission, the channel information including an indication of a transmission precoding matrix indicator, an indication of channel state information, or a combination thereof.

[0266] Aspect 9: According to the method of aspect 8, receiving the channel information includes: receiving channel information having an indication that a second UE cannot participate in communication under a second authorization or having feedback associated with source data transmission.

[0267] Aspect 10: The method according to any one of aspects 8 to 9, wherein receiving the channel information includes: receiving the channel information in response to receiving a transmission including a second authorization.

[0268] Aspect 11: The method according to any one of aspects 1 to 10 further includes: monitoring feedback associated with resources configured by transmission for source data transmission of the base station with the first UE.

[0269] Aspect 12: The method according to any one of aspects 1 to 11 further includes: receiving a control message from a base station, the control message activating feedback of communication performed by the first UE using a first resource set; and monitoring first downlink resources associated with the feedback of source data transmission of the first UE configured by the transmission for the base station based at least in part on the received control message.

[0270] Aspect 13: The method according to any one of aspects 1 to 12 further includes: receiving from the base station a downlink control information message instructing the UE to retransmit source data transmitted to the base station via a second UE or via a first UE; and retransmitting the source data at least in part based on the downlink control information message.

[0271] Aspect 14: The method according to any one of aspects 1 to 4 and 7 to 12 further includes: determining that the second UE retransmits source data using the second resource set; and monitoring feedback associated with the source data transmission for the base station based at least in part on determining that the second UE retransmits source data.

[0272] Aspect 15: A method for wireless communication at a second UE, comprising: receiving from a base station a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE; determining that the first grant allocates the first resource set for source data transmission of the first UE, and allocating the second resource set for the second UE for relaying the source data transmission from the first UE to the base station; and communicating with one or more of the first UE or the base station based at least in part on the received transmission.

[0273] Aspect 16: The method according to aspect 15, wherein receiving the transmission includes: receiving a packet addressed to a first UE including downlink control information indicating a first grant and a second grant, wherein the second UE determines the second grant allocation of a first resource set and a second resource set at least in part based on the downlink control information.

[0274] Aspect 17: The method according to any one of aspects 15 to 16, wherein receiving the transmission includes: receiving a first grant for a second resource set including sidelink resources and uplink resources, wherein the second UE uses the sidelink resources to receive source data transmission from the first UE, the second UE uses the uplink resources to communicate with the base station, or both.

[0275] Aspect 18: The method according to any one of aspects 15 to 17, wherein receiving the transmission includes: receiving a downlink control information message, the downlink control information message allocating resources for the second UE to send feedback associated with the source data transmission of the first UE or to indicate that the second UE cannot participate in communication under a second authorization, wherein the second UE communicates with the first UE or the base station (base station) at least in part based on the downlink control information message.

[0276] Aspect 19: The method according to any one of aspects 15 to 18 further includes: using resources configured by transmission to send an indication that the second UE cannot participate in communication under the second authorization.

[0277] Aspect 20: The method according to any one of aspects 15 to 19 further includes: using resources configured by transmission to send an indication of the duration during which the second UE cannot participate in relay communication.

[0278] Aspect 21: The method according to any one of aspects 15 to 18 further includes: receiving source data transmission from the first UE using a first resource set; and using resources configured by the transmission to send feedback associated with the source data transmission.

[0279] Aspect 22: The method according to any one of aspects 15 to 21 further includes: using resources configured by transmission to transmit channel information, the channel information including an indication of a transmission precoding matrix indicator, an indication of channel state information, or a combination thereof.

[0280] Aspect 23: According to the method of aspect 22, sending the channel information includes: sending channel information having an indication that the second UE cannot participate in communication under the second authorization or having feedback associated with the source data transmission.

[0281] Aspect 24: The method according to any one of aspects 22 to 23, wherein sending the channel information includes: sending the channel information in response to receiving a transmission including a second grant.

[0282] Aspect 25: The method according to any one of aspects 15 to 24 further includes: receiving feedback associated with source data transmission of the first UE from a base station via resources configured by transmission, wherein communication is performed at least in part based on the feedback sent by the base station.

[0283] Aspect 26: The method according to aspect 25 further includes: suppressing communication under the second authorization based at least in part on feedback indicating that the base station is able to successfully decode the source data transmission.

[0284] Aspect 27: The method according to any one of aspects 25 to 26 further includes: communicating under the second authorization based at least in part on feedback indicating that the base station cannot successfully decode the source data transmission.

[0285] Aspect 28: The method according to any one of aspects 15 to 18 and 21 to 27 further includes: receiving source data transmission from a first UE using a first resource set; and sending source data transmission to a base station using a second resource set.

[0286] Aspect 29: The method according to aspect 28 further includes: monitoring, at least in part, feedback of resources configured by transmission for use in relation to source data transmission sent by the second UE, based on the transmission of source data.

[0287] Aspect 30: A method for wireless communication at a base station, comprising: generating a first grant for allocating a first resource set for source data transmission of a first UE; generating a second grant for allocating a second resource set for a second UE; transmitting a transmission including the first grant and the second grant to the first UE and the second UE; and communicating with one or more of the first UE or the second UE at least in part based on transmitting packets including the first grant and the second grant.

[0288] Aspect 31: An apparatus for wireless communication at a first UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the methods of any one of aspects 1 to 14.

[0289] Aspect 32: An apparatus for wireless communication at a first UE, comprising at least one component for performing the method of any one of aspects 1 to 14.

[0290] Aspect 33: A non-transitory computer-readable medium storing code for wireless communication at a first UE, the code including instructions executable by a processor to perform the methods of any one of aspects 1 to 14.

[0291] Aspect 34: An apparatus for wireless communication at a second UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the methods of any one of aspects 15 to 29.

[0292] Aspect 35: An apparatus for wireless communication at a second UE, comprising at least one component for performing the method of any one of aspects 15 to 29.

[0293] Aspect 36: A non-transitory computer-readable medium storing code for wireless communication at a second UE, said code including instructions executable by a processor to perform the methods of any one of aspects 15 to 29.

[0294] Aspect 37: An apparatus for wireless communication, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the methods of any one of aspects 30 to 30.

[0295] Aspect 38: An apparatus for wireless communication, comprising at least one component for performing the method of any one of aspects 30 to 30.

[0296] Aspect 39: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods of any one of aspects 30 to 30.

[0297] It should be noted that the methods described herein depict possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0298] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used extensively in the description, the techniques described herein are applicable to networks beyond LTE, LTE-A, LTE-A-Pro, or NR networks. For example, the described techniques can be applied to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0299] The information and signals described herein can be represented using any of a variety of different technologies and processes. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0300] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or executed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware component or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any processor, controller, microcontroller or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0301] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features implementing the functions can also be physically located in various locations, including being distributed such that a portion of the functions is implemented in different physical locations.

[0302] Computer-readable media include non-transitory computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one place to another. Non-transitory storage media can be any available medium accessible by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other means of carrying or storing desired program code in the form of instructions or data structures and accessible by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Furthermore, any connection is properly referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used herein, disks and optical discs include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of these are also included within the scope of computer-readable media.

[0303] As used herein, the word "or" used in a list of items, including in the claims (e.g., a list of items beginning with phrases such as "at least one of..." or "one or more of..."), signifies a list of inclusions, for example, a list of at least one of A, B, or C signifies A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on..." should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" may be based on conditions A and B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on..." should be interpreted in the same manner as the phrase "at least partially based on...".

[0304] In the accompanying drawings, similar parts or features may have the same reference label. Furthermore, various components of the same type can be distinguished by a dash following the reference label and a second label distinguishing them from similar components. If only the first reference label is used in the specification, the description applies to any similar component having the same first reference label, regardless of the second or other subsequent reference labels.

[0305] The description herein, illustrated with reference to the accompanying drawings, describes an example configuration and does not represent all examples that can be implemented or that are within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," and not "preferred" or "superior to other examples." The detailed description includes specific details used to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some cases, known structures and devices are shown in the form of block diagrams to avoid obscuring the concepts of the described examples.

[0306] The description herein is provided to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and other variations may be applied without departing from the scope of this disclosure, as the general principles defined herein may be applied. Therefore, this disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication at a first user equipment (UE), comprising: Receive from network device a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for the second UE; The received transmission allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization; as well as The source data transmission is sent to the second UE and the network device using the first resource set.

2. The method according to claim 1, wherein, Receiving the transmission includes: A packet addressed to the first UE is received, the packet including downlink control information indicating the first grant and the second grant, wherein the determination of the first grant allocation of the first resource set and the second resource set is based at least in part on the downlink control information.

3. The method according to claim 1, wherein, Receiving the transmission includes: The first UE receives a first grant for a first resource set including sidelink resources and uplink resources, wherein the first UE uses the sidelink resources to communicate with the second UE and uses the uplink resources to communicate with the network device.

4. The method according to claim 1, wherein, Receiving the transmission includes: The second UE receives a downlink control information message, which allocates resources for the second UE to send feedback associated with the source data transmission of the first UE or to indicate that the second UE cannot participate in communication under the second authorization, wherein the communication is performed at least in part based on the second UE using the feedback resources.

5. The method according to claim 1, further comprising: Using the resources configured by the transmission, receive from the second UE an indication that the second UE cannot participate in communication according to the second authorization.

6. The method according to claim 1, further comprising: Using the resources configured by the transmission, receive from the second UE an indication of the duration during which the second UE cannot participate in relay communication.

7. The method according to claim 1, further comprising: The second UE receives feedback associated with the source data transmission using the resources configured by the transmission.

8. The method according to claim 1, further comprising: Using resources configured by the transmission, the second UE receives channel information, which includes an indication of a transmission precoding matrix indicator, an indication of channel state information, or a combination thereof.

9. The method according to claim 1, further comprising: Monitor the resources configured by the transmission for feedback associated with the source data transmission of the first UE by the network device.

10. The method according to claim 1, further comprising: The network device receives a control message that activates feedback for communication performed by the first UE using the first resource set. as well as The first downlink resources are monitored, at least in part, based on the reception of the control messages, to monitor the feedback of the source data transmission of the network device associated with the first UE, configured by the transmission.

11. The method according to claim 1, further comprising: The UE receives a downlink control information message from the network device, the downlink control information message instructing the UE to retransmit the source data transmitted to the network device via the second UE or via the first UE; as well as The source data transmission is retransmitted at least in part based on the downlink control information message.

12. The method according to claim 1, further comprising: It is determined that the second UE uses the second resource set to retransmit the source data transmission; as well as The network device monitors feedback associated with the source data transmission, at least in part, based on determining that the second UE retransmits the source data transmission.

13. A method for performing wireless communication at a second user equipment (UE), comprising: Receive from network equipment a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE; The first authorization allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization; as well as The communication with the first UE or one or more of the network devices is based at least in part on the received transmissions.

14. The method according to claim 13, wherein, Receiving the transmission includes: The UE receives a packet addressed to the first UE, the packet including downlink control information indicating the first grant and the second grant, wherein the second UE determines the allocation of the second grant to the first resource set and the second resource set based at least in part on the downlink control information.

15. The method according to claim 13, wherein, Receiving the transmission includes: The second UE receives a first grant for a second resource set including sidelink resources and uplink resources, wherein the second UE uses the sidelink resources to receive the source data transmission from the first UE, the second UE uses the uplink resources to communicate with the network device, or both.

16. The method according to claim 13, wherein, Receiving the transmission includes: The second UE receives a downlink control information message, which allocates resources for the second UE to send feedback associated with the source data transmission of the first UE or to indicate that the second UE cannot participate in communication according to the second authorization, wherein the second UE communicates with the first UE or the network device at least in part based on the downlink control information message.

17. The method of claim 13, further comprising: The resources configured by the transmission are used to send an indication that the second UE cannot participate in communication according to the second authorization.

18. The method of claim 13, further comprising: The resources configured by the transmission are used to send an indication of the duration during which the second UE cannot participate in relay communication.

19. The method of claim 13, further comprising: The source data transmission is received from the first UE using the first resource set; as well as Use the resources configured by the transmission to send feedback associated with the source data transmission.

20. The method of claim 13, further comprising: Channel information is transmitted using resources configured by the transmission, the channel information including indications of transmission precoding matrix indicators, indications of channel state information, or a combination thereof.

21. The method of claim 13, further comprising: Feedback associated with the source data transmission of the first UE is received from the network device via resources configured by the transmission, wherein the communication is performed at least in part based on the feedback sent by the network device.

22. The method of claim 21, further comprising: Communication under the second authorization is suppressed, at least in part, based on the feedback indicating that the network device is able to successfully decode the source data transmission.

23. The method of claim 21, further comprising: Communication is performed in accordance with the second authorization, at least in part based on the feedback indicating that the network device cannot successfully decode the source data transmission.

24. The method of claim 13, further comprising: The source data transmission is received from the first UE using the first resource set; as well as The source data transmission is sent to the network device using the second resource set.

25. An apparatus for performing wireless communication at a source user equipment (UE), comprising: processor; Memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor, to cause the device to: Receive from network device a transmission including a first grant for a first resource set for the first UE and a second grant for a second resource set for the second UE; The received transmission allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization; as well as The source data transmission is sent to the second UE and the network device using the first resource set.

26. An apparatus for performing wireless communication at a relay user equipment (UE), comprising: processor; Memory coupled to the processor; as well as Instructions stored in the memory and executable by the processor to cause the device to perform the following operations: Receive from network equipment a transmission including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE; The received transmission allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization; as well as The communication is conducted with the first UE or one or more of the network devices, at least in part, based on the received transmissions.

27. An apparatus for performing wireless communication at a source user equipment (UE), comprising: A component that receives transmissions from a network device including a first grant for a first resource set for the first UE and a second grant for a second resource set for the second UE; The received transmission allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization. as well as The component that uses the first resource set to send the source data transmission to the second UE and the network device.

28. An apparatus for performing wireless communication at a relay user equipment (UE), comprising: A component that receives transmissions from a network device including a first grant for a first resource set for a first UE and a second grant for a second resource set for a second UE; The received transmission allocates the first resource set for the source data transmission of the first UE and allocates the second resource set for the second UE, for relaying the source data transmission from the first UE to the network device, and for sending feedback associated with the source data transmission of the first UE or for indicating that the second UE cannot participate in communication according to the second authorization. as well as The component that communicates with the first UE or one or more of the network devices, at least in part, based on the received transmissions.

29. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a user equipment (UE) to cause the processor to perform a computer-implemented method according to any one of claims 1 to 14.

30. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a user equipment (UE) to cause the processors to perform a computer-implemented method according to any one of claims 13 to 24.

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