WO2022193114A1 - Techniques de construction de livre de codes de rétroaction au niveau de relais dans des systèmes de communication sans fil - Google Patents

Techniques de construction de livre de codes de rétroaction au niveau de relais dans des systèmes de communication sans fil Download PDF

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Publication number
WO2022193114A1
WO2022193114A1 PCT/CN2021/080963 CN2021080963W WO2022193114A1 WO 2022193114 A1 WO2022193114 A1 WO 2022193114A1 CN 2021080963 W CN2021080963 W CN 2021080963W WO 2022193114 A1 WO2022193114 A1 WO 2022193114A1
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WIPO (PCT)
Prior art keywords
feedback
feedback messages
transmitting
receiving
messages
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PCT/CN2021/080963
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English (en)
Inventor
Luanxia YANG
Changlong Xu
Jing Sun
Shaozhen GUO
Xiaoxia Zhang
Rajat Prakash
Siyi Chen
Original Assignee
Qualcomm Incorporated
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Priority to PCT/CN2021/080963 priority Critical patent/WO2022193114A1/fr
Publication of WO2022193114A1 publication Critical patent/WO2022193114A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Definitions

  • the following relates to wireless communication, including techniques for feedback codebook construction at relays in wireless communications systems.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the 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) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • Some wireless communications systems may support devices operating as relays to extend coverage areas. For example, a relay device operating within a coverage area associated with a base station and may establish a connection with a UE operating outside of the coverage area associated with the base station such that UE may communicate with the base station via the relay device.
  • a wireless communications system may support multi-relay configurations in which multiple relays are used by a UE to communicate with a base station. It may be beneficial to provide feedback techniques in wireless communications systems using multi-relay configurations.
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for feedback codebook construction at relays in wireless communications systems.
  • the described techniques provide for a first device to receive control signaling from a second device indicating a first set of resources for receiving a first set of feedback messages from additional devices and a second set of resources for forwarding a second set of feedback messages to the second device.
  • the first device may receive and forward feedback messages accordingly.
  • the first device may separately forward feedback messages received from different additional devices.
  • a method for wireless communication at a first device may include receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages, receiving the first set of feedback messages from the set of additional devices using the first set of resources, and transmitting the second set of feedback messages to the second device using the second set of resources.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to receive control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages, receive the first set of feedback messages from the set of additional devices using the first set of resources, and transmit the second set of feedback messages to the second device using the second set of resources.
  • the apparatus may include means for receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages, means for receiving the first set of feedback messages from the set of additional devices using the first set of resources, and means for transmitting the second set of feedback messages to the second device using the second set of resources.
  • a non-transitory computer-readable medium storing code for wireless communication at a first device is described.
  • the code may include instructions executable by a processor to receive control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages, receive the first set of feedback messages from the set of additional devices using the first set of resources, and transmit the second set of feedback messages to the second device using the second set of resources.
  • transmitting the second set of feedback messages may include operations, features, means, or instructions for transmitting the first set of feedback messages to the second device using the second set of resources, where the second set of feedback messages includes the first set of feedback messages.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a first feedback message based on concatenating one or more feedback messages of the first set of feedback messages in an order based on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the first feedback message.
  • transmitting the second set of feedback messages may include operations, features, means, or instructions for determining a second feedback message including one or more feedback messages of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the second feedback message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a third feedback message based on one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the third feedback message.
  • determining the third feedback message may include operations, features, means, or instructions for determining the third feedback message based on concatenating the one or more feedback messages of the first set of feedback messages.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an indication of one or more identifiers associated with the one or more devices of the set of additional devices to the base station, where the third feedback message includes the indication.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting an indication of one or more lengths associated with the one or more feedback messages of the first set of feedback messages to the second device, where the third feedback message includes the indication.
  • determining the third feedback message may include operations, features, means, or instructions for determining one or more feedback indicators included in the one or more feedback messages based on deconstructing the one or more feedback messages and determining the third feedback message based on combining the one or more feedback indicators.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving an indication of one or more feedback parameters from the second device, the feedback parameters configured to indicate a location of each of the one or more feedback indicators included in the third feedback message, where the one or more feedback parameters include one or more counter downlink assignment indices and one or more total downlink assignment indices.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving one or more downlink transmissions from the second device and determining a fourth feedback message based on receiving the one or more downlink transmissions, where transmitting the second set of feedback messages includes transmitting the fourth feedback message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining one or more modified feedback messages based on padding each of the one or more feedback messages of the first set of feedback messages with zeros, where a length of each of the one or more modified feedback messages includes a maximum length associated with feedback messages and transmitting an indication of the maximum length to the second device, where the second set of feedback message includes the indication.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining a set of timing delays for transmitting the second set of feedback messages relative to a set of system frame numbers associated with the first set of feedback messages, where transmitting the second set of feedback messages may be based on the set of timing delays.
  • the set of timing delays may be associated with a set of timing thresholds preconfigured at the user equipment (UE) and each timing delay of the set of timing delays may be greater than each associated timing threshold of the set of timing thresholds.
  • UE user equipment
  • receiving the control signaling may include operations, features, means, or instructions for receiving a timing parameter from the second device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, where transmitting the second set of feedback messages may be based on receiving the timing parameter.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a grant scheduling a third set of resources for transmitting the control signaling to one or more devices of the set of additional devices, where the control signaling includes the grant and transmitting the control signaling to the one or more devices using the third set of resources.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a grant scheduling a fourth set of resources for receiving one or more downlink transmissions from the second devices and a fifth set of resources for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, where the control signaling includes the grant, receiving the one or more downlink transmissions from the second device using the fourth set of resources, and transmitting the control signaling and the one or more downlink transmissions to the one or more devices of the set of additional devices using the fifth set of resources, where receiving the first set of feedback messages includes receiving the first set of feedback messages in response to transmitting the control signaling and the one or more downlink transmissions.
  • the second device includes a base station and the second device includes a UE.
  • a method for wireless communication at a base station may include transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages and receiving the second set of feedback messages from the first device using the second set of resources.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to transmit control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages and receive the second set of feedback messages from the first device using the second set of resources.
  • the apparatus may include means for transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages and means for receiving the second set of feedback messages from the first device using the second set of resources.
  • a non-transitory computer-readable medium storing code for wireless communication at a base station is described.
  • the code may include instructions executable by a processor to transmit control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages and receive the second set of feedback messages from the first device using the second set of resources.
  • receiving the second set of feedback messages may include operations, features, means, or instructions for receiving the first set of feedback messages from the first device using the second set of resources, where the second set of feedback messages includes the first set of feedback messages.
  • receiving the second set of feedback messages may include operations, features, means, or instructions for receiving a first feedback message from the first device, the first feedback message including a concatenation of one or more feedback messages of the first set of feedback messages in an order based on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a second feedback message from the first device, the second feedback message including one or more feedback messages associated of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • receiving the second set of feedback messages may include operations, features, means, or instructions for receiving a third feedback message from the first device, the third feedback message including a concatenation of one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a first indication of one or more identifiers associated with the one or more devices of the set of additional devices from the first device and a second indication of one or more lengths associated with the one or more feedback messages, where the third feedback message includes the first indication and the second indication.
  • receiving the second set of feedback messages may include operations, features, means, or instructions for receiving a fourth feedback message from the first device, the fourth feedback message including a combination of one or more feedback indicators included in one or more feedback messages of the first set of feedback messages.
  • transmitting the control signaling may include operations, features, means, or instructions for transmitting a timing parameter to the first device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, where receiving the second set of feedback messages may be based on transmitting the timing parameter.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a grant scheduling a third set of resources for the first device to use for transmitting the control signaling to one or more devices of the set of additional devices, where the control signaling includes the grant.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a grant scheduling a fourth set of resources for the first device to use for receiving one or more downlink transmissions from the base station and a fifth set of resources for the first device to use for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, where the control signaling includes the grant and transmitting the one or more downlink transmissions to the first device, where receiving the second set of feedback messages includes receiving the second set of feedback messages based on transmitting the one or more downlink transmissions.
  • FIG. 1 illustrates an example of a wireless communications system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 2 illustrates an example of a wireless communications system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a process flow in a system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 4A–C illustrate examples of joint feedback codebooks in a system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 5 illustrates an example of a process flow in a system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIGs. 6 and 7 show block diagrams of devices that support techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 8 shows a block diagram of a communications manager that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 9 shows a diagram of a system including a device that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIGs. 10 and 11 show block diagrams of devices that support techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 12 shows a block diagram of a communications manager that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIG. 13 shows a diagram of a system including a device that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • FIGs. 14 through 18 show flowcharts illustrating methods that support techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • Some wireless communications systems support devices establishing both an access link with a base station (e.g., a Uu interface) and sidelinks with other devices (e.g., a PC5 interface) .
  • a user equipment UE
  • sidelinks may be used to extend a coverage area associated with a base station.
  • a first UE that is operating outside of the coverage area may establish a sidelink with a second UE that is operating within the coverage area.
  • the second UE may operate as a relay UE such that the first UE may communicate with the base station via the relay UE.
  • the relay UE may forward signals from the base station to the first UE and from the first UE to the base station, thereby extending the coverage area associated with the base station.
  • Some wireless communications which support using relays to extend coverage areas may support multi-relay configurations such that a UE may use multiple relays to communicate with a base station (e.g., communications between a base station and a UE may pass through multiple relays) .
  • feedback e.g., hybrid automatic repeat request (HARQ) feedback
  • HARQ hybrid automatic repeat request
  • One such method may include a base station scheduling resources for a relay to receive feedback messages (e.g., HARQ codebooks) from additional devices and for the relay to forward the feedback messages to the base station.
  • a relay may receive control signaling from a base station scheduling the resources, may receive feedback messages from the additional devices, and may transmit the feedback messages to the base station using the scheduled resources.
  • a relay may separately forward each feedback message received from a different device. If the relay receives multiple feedback messages from a same device, then the relay may, in some examples, concatenate the feedback messages (e.g., in chronological order) and transmit them to the base station. In some such examples, the relay may pad the feedback messages to a maximum length and transmit an indication of the maximum length to the base station. In some examples, the relay may transmit the feedback messages to the base station based on a transmission timing relative to receiving the feedback messages from the other devices. For example, the relay may receive a timing parameter (e.g., a HARQ timing field) from the base station indicating a transmission timing.
  • a timing parameter e.g., a HARQ timing field
  • the relay may determine a timing delay relative to receiving feedback messages based on timing thresholds configured by the base station and may forward feedback messages upon fulfilment of the timing delay.
  • the transmission timing may be based on one or more system frame numbers associated with the feedback messages received from other devices and the relay may transmit an indication of the system frame numbers to the base station (e.g., using the last four bits of each system frame number) .
  • the relay may jointly report feedback messages from multiple devices. For example, the relay may receive feedback messages from multiple devices and may concatenate or otherwise combine the feedback messages before transmitting them to the base station. In some examples, the relay may transmit device identifiers associated with feedback messages from different devices to the base station. If the relay receives feedback messages having different lengths (e.g., if operating in a dynamic feedback configuration) the relay may, in some examples, transmit indications of lengths associated with the feedback messages to the base station. In some examples, the relay may deconstruct the feedback messages or otherwise extract acknowledgement (ACK) /negative acknowledgement (NACK) indications from the feedback messages and may combine the indications to construct a joint feedback message.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • the relay may use configured counter and total downlink assignment indicators (DAI) to indicate locations of the ACK/NACK indications in the joint feedback message.
  • DAI downlink assignment indicators
  • aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further described in the context of process flows and joint feedback codebooks. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for feedback codebook construction at relays in wireless communications systems.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface) .
  • the base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) , or indirectly (e.g., via core network 130) , or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., the number of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions) .
  • Ultra-reliable communications may include private 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) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, 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 may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to IP services 150 for one or more network operators.
  • the IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • 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 consolidated into a single network device (e.g., a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands, for example in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with an orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • HARQ feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the wireless communications system 100 may support devices establishing both an access link (e.g., a Uu interface) and a sidelink (e.g., a PC5 interface) .
  • a UE 115 may establish an access link with a base station 105 and a sidelink with a second UE 115.
  • devices may use sidelink communications to extend coverage areas 110 associated with base stations 105 or to reduce processing or communications loads of the base stations 105.
  • a first UE 115 operating outside of a coverage area 110 associated with a base station 105 may establish a sidelink with a second UE 115 operating within the coverage area 110.
  • the second UE 115 may operate as a relay such that the second UE 115 forwards signaling and enabling communications between and the first UE 115 and the base station 105.
  • the wireless communications system 100 may support multi-relay configurations such that multiple devices may be used to relay signaling between a UE 115 and a base station 105.
  • relays may operate at a physical layer, such that control and scheduling for all devices connected via the relays is managed by a base station 105.
  • the base station 105 may perform collision avoidance by not scheduling multiple devices to transmit simultaneously. Accordingly, it may be beneficial to enable feedback in multi-relay systems such that a base station 105 may know a status associated with each transmission (e.g., each transport block) at each device.
  • One such method may include a base station 105 scheduling resources for a relay (e.g., a UE 115) to receive feedback messages from additional devices (e.g., other UEs 115) and for the relay to forward the feedback messages to the base station 105.
  • a relay may receive control signaling from the base station 105 scheduling the resources, may receive feedback messages from the additional devices, and may transmit the feedback messages to the base station 105 using the scheduled resources.
  • the relay may separately forward each feedback message received from different devices.
  • the relay may concatenate or otherwise combine feedback messages from different devices and transmit a joint feedback message to the base station 105.
  • the relay may concatenate a set of feedback messages received from other devices and may use device identifiers or codebook lengths to distinguish between feedback messages from different devices.
  • the relay may combine individual ACK/NACK indications included in feedback messages from different devices to form the joint feedback message.
  • the relay may use counter and total DAI values configured by the base station 105 to indicate locations of the ACK/NACK indications associated with different devices in the joint feedback message. Implementing aspects of the wireless communications system 100 in accordance with various aspects of the present disclosure may enable feedback transmission in multi-relay configurations and may lead to an increased reliability of communications, a reduced latency, an improved user experience, or an efficient resource utilization, among other benefits.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with various aspects of the present disclosure.
  • the wireless communications system 200 may implement aspects of the wireless communications system 100 as described with reference to FIG. 1.
  • the wireless communications system 200 may include a relay 215-a and a relay 215-b which may be examples of a UE 115, a base station 105, or other devices as described with reference to FIG. 1.
  • the wireless communications system 200 may also include a UE 220-a, a UE 220-b, and a UE 220-c which may be examples of a UE 115 as described with reference to FIG. 1.
  • the wireless communications system 200 may also include a base station 305 which may be an example of a base station 105 as described with reference to FIG. 1.
  • the base station 205 may be associated with a cell providing wireless communications services within a coverage area 210.
  • the relay 215-a and the relay 215-b may operate within the coverage area 210 and the UE 220-a, the UE 220-b, and the UE 220-c may operate outside of the coverage area 210. Accordingly, the relay 215-a and the relay 215-b may extend services associated with the base station 205 such that the UE 220-a, the UE 220-b, and the UE 220-c may communicate with the base station 205 via the relay 215-a and the relay 215-b.
  • the relay 215-a may establish a communication link 225-a with the base station 205 and may establish a communication link 225-d with the UE 220-a such that the UE 220-a may communicate with the base station 205 via the communication link 225-d.
  • the relay 215-b may establish a communication link 225-b with the base station 205, a communication link 225-e with the UE 220-b, and a communication link 225-f with the UE 220-c such that the UE 220-b and the UE 220-c may communication with the base station 205 via the relay 215-b.
  • the relay 215-a may establish a communication link 225-c with the relay 215-b such that the relay 215-b may communicate with the base station 205 via the communication link 225-b (e.g., if the communication link 225-b is lost) .
  • the UE 220-b or the UE 220-c may communication with the base station 205 via both the relay 215-b and the relay 215-a. It may be beneficial to implement a method whereby the UE 220-c, the UE 220-b, the UE 220-a, the relay 215-a, and the relay 215-b may transmit feedback to the base station 205.
  • the base station 205 may transmit control signaling to the relay 215-a scheduling resources for the relay 215-a to forward downlink messages (e.g., a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) ) to the UE 220-a.
  • the relay 215-a may receive the downlink messages from the base station 205 and transmit the downlink messages to the UE 220-a.
  • the base station 205 may schedule the relay 215-b to forward downlink messages to the UE 220-b and the UE 220-c. The base station 205 may then schedule resources for each device to receive or transmit feedback associated with the downlink messages.
  • the base station 205 may schedule resources for the UE 220-a, the UE 220-b, and the UE 220-c to transmit feedback to the relay 215-a or the relay 215-b and may schedule resources for the relay 215-a and the relay 215-b to transmit feedback to the base station 205.
  • the base station 205 may schedule resources for each transmission such that the base station 205 may perform collision avoidance (e.g., by not scheduling, for example, the UE 220-a and the UE 220-b to transmit feedback simultaneously) .
  • the base station 205 may schedule devices to forward feedback messages separately for each connected device. For example, the base station 205 may transmit control signaling to the relay 215-a scheduling a first set of resources for the relay 215-a to forward the control signaling to the UE 220-a, a second set of resources for receiving a feedback message from the UE 220-a, and a third set of resources for forwarding the feedback message from the UE 220-a to the base station 205. Accordingly, the relay 215-a may forward the control signaling to the UE 220-aand may, in response, receive a feedback message from the UE 220-a associated with downlink messages forwarded to the UE 220-a.
  • the UE 220-a may transmit the feedback message to the relay 215-a according to a feedback timing relative to receiving the downlink messages.
  • the feedback timing may be based on a feedback timing parameter (e.g., a PDSCH-to-HARQ_feedback timing indicator K1) indicated in the control signaling.
  • the relay 215-a may transmit an indication to the base station 205 that the relay 215-a successfully received the feedback message from the UE 220-a. The relay 215-a may then forward the feedback message to the base station 205.
  • the base station 205 may transmit downlink messages to the relay 215-a such that the relay 215-a may transmit feedback associated with the downlink messages separate from the feedback message received from the UE 220-a. Similarly, the base station 205 may schedule resources for the relay 215-b to separately forward feedback messages from the UE 220-b and the UE 220-c.
  • the relay 215-a or the relay 215-b may forward feedback messages according to a transmission timing (e.g., relative to receiving the feedback messages from the UE 220-a, the UE 220-b, or the UE 220-c) based on a timing field included in control signaling received from the base station 205.
  • the timing field may include a number of bits equal to three times the number of devices used as a relay for a given device.
  • the relay 215-a or the relay 215-b may forward feedback messages according to a configured transmission matching rule (e.g., such that a timing gap between receiving the feedback messages and forwarding the feedback messages is larger than a configured threshold) . In such examples, the relay 215-a or the relay 215-b may be configured with a different threshold for each connected device.
  • the relay 215-a or the relay 215-b may receive multiple feedback messages (e.g., from the UE 220-a, the UE 220-b, or the UE 220-c) before forwarding the feedback messages.
  • the relay 215-a may receive a first feedback message from the UE 220-a and may receive a second feedback message from the UE 220-a before forwarding the first feedback message to the base station 205.
  • the relay 215-a or the relay 215-b may transmit multiple feedback messages from one device to the base station 205 using a same set of resources.
  • the relay 215-a or the relay 215-b may transmit, with feedback messages, an indication (e.g., received from the UE 220-a, the UE 220-b, or the UE 220-c) of a system frame number associated with each feedback message.
  • the relay 215-a or the relay 215-b may forward the last four bits of each system frame number to the base station 205.
  • the relay 215-a or the relay 215-b may aggregate feedback messages from one device in a chronological order (e.g., in an order in which the feedback messages were received by the relay 215-a or the relay 215-b.
  • the relay 215-a or the relay 215-b may pad feedback messages with zeros such that each feedback message has a same length and may transmit an indication of the length to the base station 205.
  • the base station 205 may schedule devices to jointly report (e.g., using feedback codebook multiplexing) feedback for each connected device. For example, the base station may schedule the relay 215-b to jointly forward feedback messages from the UE 220-b and the UE 220-c. Accordingly, the base station 205 may schedule a first set of resources for the relay 215-b to receive feedback messages from the UE 220-b and the UE 220-c and a second set of resources for the relay 215-b to jointly report the feedback messages.
  • the base station 205 may schedule devices to jointly report (e.g., using feedback codebook multiplexing) feedback for each connected device. For example, the base station may schedule the relay 215-b to jointly forward feedback messages from the UE 220-b and the UE 220-c. Accordingly, the base station 205 may schedule a first set of resources for the relay 215-b to receive feedback messages from the UE 220-b and the UE 220-c and a second set of resources for the relay 215-b to jointly report the feedback
  • the relay 215-b may receive feedback messages from the UE 220-b and the UE 220-c and may determine a joint feedback message for transmitting to the base station 205 based on encoding information from each received feedback message and any feedback associated with the relay 215-b.
  • the relay may transmit the joint feedback message to the base station 205.
  • the relay 215-a or the relay 215-b may determine the joint feedback message by combining feedback messages received from each connected device. For example, the relay 215-a may receive a feedback message from the UE 220-b associated with a transport block received by the UE 220-b and a feedback message from the UE 220-c associated with a transport block received by the UE 220-c and may concatenate the feedback messages with a feedback message associated with a transport block received by the relay 215-b to determine a joint feedback message. In some examples, the relay 215-a or the relay 215-b may include a device identifier (e.g., a UE ID) to distinguish feedback messages associated with different devices.
  • a device identifier e.g., a UE ID
  • the relay 215-a or the relay 215-b may transmit an indication of a length associated with each feedback message included in the joint feedback message. In some example, the relay 215-a or the relay 215-b may determine a maximum length of the feedback messages and pad each feedback message with zeros to the maximum length.
  • the relay 215-a or the relay 215-b may determine a joint feedback message for all transport blocks received by the relay 215-a or the relay 215-b and all ACK/NACK indications included in feedback messages received from each connected nodes (e.g., on a per PDSCH basis) .
  • the relay 215-a may receive a feedback message from the UE 220-b and a feedback message from the UE 220-c and may determine a feedback message associated with the relay 215-a.
  • the relay 215-a may deconstruct each feedback message to obtain the ACK/NACK indications included in each feedback message and construct a joint feedback message using the indications.
  • the base station 205 may define one or more DAI values that the relay 215-a or the relay 215-b may use to indicate locations of each ACK/NACK indication in the joint feedback message.
  • the base station 205 may indicate a counter DAI (c-DAI) and a total DAI (t-DAI) for each device on a per PDSCH basis.
  • the base station 205 may indicate a c-DAI and a t-DAI for the UE 220-b, a c-DAI and a t-DAI (e.g., a r1c-DAI and a r1t-DAI) for the relay 215-b and a c-DAI and a t-DAI (e.g., a r2c-DAI and a r2t-DAI) for the relay 215-a which the relay 215-a or the relay 215-b may use to construct the joint feedback message.
  • a c-DAI and a t-DAI e.g., a r1c-DAI and a r1t-DAI
  • a c-DAI and a t-DAI e.g., a r2c-DAI and a r2t-DAI
  • the base station 205 may indicate different c-DAI and t-DAI pairs for each PDSCH transmissions associated with the UE 220-b. In some implementations, the base station 205 may indicate a number of c-DAI and t-DAI pairs may be equal to one plus the number of relays 215 between the UE 220-b and the base station 205. Implementing aspects of the wireless communications system 200 may enable feedback transmission and forwarding in systems utilizing multi-relay configurations.
  • FIG. 3 illustrates an example of a process flow 300 in a system that supports techniques for feedback codebook constructions at relays in wireless communications systems in accordance with various aspects of the present disclosure.
  • the process flow 300 may be implemented in accordance with one or more aspects of wireless communications systems 100 or 200 as described with reference to FIGs. 1 and 2.
  • the process flow 300 may include a UE 315, a relay 310, and a base station 305 which may be examples of the corresponding devices described herein.
  • the UE 315 may communicate with the base station 305 via the relay 310.
  • Alternative examples of the following may be implemented in which some processes are performed in a different order than described or are not performed at all.
  • the processes may include additional features not mentioned below, or further processes may be added.
  • the base station 305 may transmit control signaling (e.g., a PDCCH) to the relay 310 scheduling resources for the relay 310 to forward the control signaling and one or more downlink transmissions to the UE 315.
  • control signaling e.g., a PDCCH
  • the base station 305 may transmit the downlink transmissions to the relay 310 and, at 330, the relay 310 may forward the control signaling and the downlink transmissions to the UE 315.
  • the base station 305 may transmit additional control signaling to the relay 310 scheduling a first set of resources for the relay 310 to forward the control signaling to the UE 315, a second set of resources for receiving feedback messages from the UE 315, and a third set of resources for forwarding the feedback messages to the base station 305.
  • the relay 310 may, at 340, forward the control signaling to the UE 315.
  • the relay 310 may receive downlink transmissions (e.g., a PDCCH and a PDSCH) from the base station 305.
  • downlink transmissions e.g., a PDCCH and a PDSCH
  • the UE 315 may transmit, and the relay 310 may receive, a feedback message associated with the downlink transmissions forwarded to the UE 315 by the relay 310.
  • the relay 310 may transmit the feedback message to the base station 305.
  • the relay 310 may relay the feedback message based on a transmission timing indicated by the base station 305.
  • the relay 310 may transmit the feedback message based on a pre-configured timing (e.g., a timing gap larger than a threshold) .
  • the relay 310 may transmit a feedback message associated with downlink transmission received from the base station 305 separate from the feedback message received from the UE 315.
  • Implementing aspects of the process flow 300 may enable feedback transmission in wireless communications systems using multi-relay configurations.
  • FIG. 4A-C illustrate examples of a joint feedback codebook 400-a, a joint feedback codebook 400-b, and a joint feedback codebook 400-c in a system that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with various aspects of the present disclosure.
  • the joint feedback codebook 400-a, the joint feedback codebook 400-b, and the joint feedback codebook 400-c may be implemented in accordance with one or more aspects of wireless communications systems 100 or 200 or the process flow 300.
  • nodes in a wireless communications system may jointly report, to one or more parent nodes, feedback received from child nodes using one or more of the joint feedback codebook 400-a, the joint feedback codebook 400-b, or the joint feedback code 400-c.
  • a first node may (e.g., if operating in a semi-static feedback configuration) concatenate feedback messages from each child node to determine a feedback message based on the joint feedback codebook 400-a.
  • the first node may include a node identifier 305-a, a time index 310-a and a codebook 315-a associated with a feedback message for the first node.
  • the first node may also concatenate feedback messages associated with child nodes, including a node identifier 305-b, a time index 310-b, and a codebook 315-b associated with a feedback message for a child node. In this way, the first node may jointly report feedback for each child node such that each feedback message is distinguished by the included node identifier 305.
  • a first node may (e.g., if operating in a dynamic feedback configuration) concatenate feedback messages from each child node to determine a joint feedback message based on the joint feedback codebook 400-b.
  • a first node may receive feedback messages of different lengths from child nodes.
  • the first node may include an indication of a length for each codebook included in the joint feedback message.
  • the first node may include a node identifier 320-a, a codebook length 325-a, a time index 330-a, and a codebook 335-a for a feedback message associated with the first node.
  • the first node may construct the feedback message including a node identifier 320-b, a codebook length 325-b, a time index 330-b and a codebook 335-b associated with a feedback message for a child node.
  • the first node may jointly report feedback for each child node such that each feedback message is distinguished by the included node identifier 305 and codebook length 325.
  • a first node may (e.g., if operating in a dynamic feedback configuration) concatenate feedback messages from each child node to determine a joint feedback message based on the joint feedback codebook 400-c.
  • first node may receive feedback messages of different lengths from child nodes. Accordingly, the first node may determine a maximum length of the received feedback messages and pad each feedback message to the maximum length.
  • the first node may transmit an indication of the maximum length with the joint feedback message.
  • the first node may include a codebook length 340 indicating the maximum length.
  • the first node may then construct the codebook and may include a node identifier 345-a, a time index 350-a, and a codebook 355-a for a feedback message associated with the first node and a node identifier 345-b, a time index 350-b, and a codebook 355-b for a feedback message associated with a child node.
  • the first node may jointly report feedback for each child node and may indicate the maximum codebook length such that each feedback message is distinguished by the included node identifier 305.
  • Implementing aspects of the joint feedback codebook 400-a, the joint feedback codebook 400-b, and the joint feedback codebook 400-c may enable feedback in wireless communications systems using multi-relay configurations.
  • FIG. 5 illustrates an example of a process flow 500 in a system that supports techniques for feedback codebook constructions at relays in wireless communications systems in accordance with various aspects of the present disclosure.
  • the process flow 500 may be implemented in accordance with one or more aspects of wireless communications systems 100 or 200, the process flow 300, or the joint feedback codebooks 400 as described with reference to FIGs. 1–4.
  • the process flow 500 may include a UE 515, a relay 510, and a base station 505 which may be examples of the corresponding devices described herein.
  • the UE 515 may communicate with the base station 505 via the relay 510.
  • Alternative examples of the following may be implemented in which some processes are performed in a different order than described or are not performed at all.
  • the processes may include additional features not mentioned below, or further processes may be added.
  • the base station 505 may transmit control signaling (e.g., a PDCCH) to the relay 510 scheduling resources for the relay 510 to forward the control signaling and one or more downlink transmissions to the UE 515.
  • control signaling e.g., a PDCCH
  • the base station 305 may transmit the downlink transmissions to the relay 310 and, at 530, the relay 510 may forward the control signaling and the downlink transmissions to the UE 515.
  • the base station 505 may transmit additional control signaling to the relay 510 scheduling a first set of resources for the relay 510 to forward the control signaling to the UE 515, a second set of resources for receiving feedback messages from the UE 515, and a third set of resources for forwarding the feedback messages to the base station 505.
  • the relay 510 may, at 540, forward the control signaling to the UE 515.
  • the relay 510 may receive downlink transmissions (e.g., a PDCCH and a PDSCH) from the base station 505.
  • downlink transmissions e.g., a PDCCH and a PDSCH
  • the UE 515 may transmit, and the relay 510 may receive, a feedback message associated with the downlink transmissions forwarded to the UE 515 by the relay 510.
  • the relay 510 may transmit a joint feedback message to the base station 505.
  • the relay 510 may concatenate a feedback message associated with the downlink transmissions received from the base station 505 and the feedback message received from the UE 515 to construct the joint feedback message.
  • the relay 510 may construct the joint feedback message using ACK/NACK indications included in the feedback message received from the UE 515 and the feedback message associated with the downlink transmissions received from the base station 505.
  • the relay 510 may use c-DAI and t-DAI pairs to indicate locations of the ACK/NACK indications in the joint feedback message. Implementing aspects of the process flow 500 may enable feedback in wireless communications systems using multi-relay configurations.
  • FIG. 6 shows a block diagram 600 of a device 605 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a UE 115 as described herein.
  • the device 605 may include a receiver 610, a transmitter 615, and a communications manager 620.
  • the device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 610 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) . Information may be passed on to other components of the device 605.
  • the receiver 610 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 615 may provide a means for transmitting signals generated by other components of the device 605.
  • the transmitter 615 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) .
  • the transmitter 615 may be co-located with a receiver 610 in a transceiver component.
  • the transmitter 615 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 620, the receiver 610, the transmitter 615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
  • the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory) .
  • the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU) , an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the functions of the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU) , an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting
  • the communications manager 620 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both.
  • the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 620 may support wireless communication at a first device in accordance with examples as disclosed herein.
  • the communications manager 620 may be configured as or otherwise support a means for receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the communications manager 620 may be configured as or otherwise support a means for receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the communications manager 620 may be configured as or otherwise support a means for transmitting the second set of feedback messages to the second device using the second set of resources.
  • the device 605 may support techniques for feedback construction in wireless communications systems such that the device 605 may exhibit an improved communication reliability, a reduced latency, an efficient resource utilization or improved coordination, among other benefits.
  • FIG. 7 shows a block diagram 700 of a device 705 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 705 may be an example of aspects of a device 605 or a UE 115 as described herein.
  • the device 705 may include a receiver 710, a transmitter 715, and a communications manager 720.
  • the device 705 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 710 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) . Information may be passed on to other components of the device 705.
  • the receiver 710 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 715 may provide a means for transmitting signals generated by other components of the device 705.
  • the transmitter 715 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) .
  • the transmitter 715 may be co-located with a receiver 710 in a transceiver component.
  • the transmitter 715 may utilize a single antenna or a set of multiple antennas.
  • the device 705, or various components thereof may be an example of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 720 may include a control receiver 725, a feedback component 730, a feedback transmitter 735, or any combination thereof.
  • the communications manager 720 may be an example of aspects of a communications manager 620 as described herein.
  • the communications manager 720, or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 710, the transmitter 715, or both.
  • the communications manager 720 may receive information from the receiver 710, send information to the transmitter 715, or be integrated in combination with the receiver 710, the transmitter 715, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 720 may support wireless communication at a first device in accordance with examples as disclosed herein.
  • the control receiver 725 may be configured as or otherwise support a means for receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the feedback component 730 may be configured as or otherwise support a means for receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the feedback transmitter 735 may be configured as or otherwise support a means for transmitting the second set of feedback messages to the second device using the second set of resources.
  • FIG. 8 shows a block diagram 800 of a communications manager 820 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the communications manager 820 may be an example of aspects of a communications manager 620, a communications manager 720, or both, as described herein.
  • the communications manager 820, or various components thereof, may be an example of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 820 may include a control receiver 825, a feedback component 830, a feedback transmitter 835, a feedback manager 840, a downlink receiver 845, a feedback modifier 850, a length transmitter 855, a delay manager 860, a timing receiver 865, a control transmitter 870, a node manager 875, an identifier transmitter 880, a parameter receiver 885, or any combination thereof.
  • Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the communications manager 820 may support wireless communication at a first device in accordance with examples as disclosed herein.
  • the control receiver 825 may be configured as or otherwise support a means for receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the feedback component 830 may be configured as or otherwise support a means for receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the feedback transmitter 835 may be configured as or otherwise support a means for transmitting the second set of feedback messages to the second device using the second set of resources.
  • the feedback transmitter 835 may be configured as or otherwise support a means for transmitting the first set of feedback messages to the second device using the second set of resources, where the second set of feedback messages includes the first set of feedback messages.
  • the feedback manager 840 may be configured as or otherwise support a means for determining a first feedback message based on concatenating one or more feedback messages of the first set of feedback messages in an order based on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the first feedback message.
  • the feedback manager 840 may be configured as or otherwise support a means for determining a second feedback message including one or more feedback messages of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the second feedback message.
  • the feedback manager 840 may be configured as or otherwise support a means for determining a third feedback message based on one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices, where transmitting the second set of feedback messages includes transmitting the third feedback message.
  • the feedback manager 840 may be configured as or otherwise support a means for determining the third feedback message based on concatenating the one or more feedback messages of the first set of feedback messages.
  • the identifier transmitter 880 may be configured as or otherwise support a means for transmitting an indication of one or more identifiers associated with the one or more devices of the set of additional devices to the base station, where the third feedback message includes the indication.
  • the length transmitter 855 may be configured as or otherwise support a means for transmitting an indication of one or more lengths associated with the one or more feedback messages of the first set of feedback messages to the second device, where the third feedback message includes the indication.
  • the feedback manager 840 may be configured as or otherwise support a means for determining one or more feedback indicators included in the one or more feedback messages based on deconstructing the one or more feedback messages. In some examples, to support determining the third feedback message, the feedback manager 840 may be configured as or otherwise support a means for determining the third feedback message based on combining the one or more feedback indicators.
  • the parameter receiver 885 may be configured as or otherwise support a means for receiving an indication of one or more feedback parameters from the second device, the feedback parameters configured to indicate a location of each of the one or more feedback indicators included in the third feedback message, where the one or more feedback parameters include one or more counter downlink assignment indices and one or more total downlink assignment indices.
  • the downlink receiver 845 may be configured as or otherwise support a means for receiving one or more downlink transmissions from the second device.
  • the feedback manager 840 may be configured as or otherwise support a means for determining a fourth feedback message based on receiving the one or more downlink transmissions, where transmitting the second set of feedback messages includes transmitting the fourth feedback message.
  • the feedback modifier 850 may be configured as or otherwise support a means for determining one or more modified feedback messages based on padding each of the one or more feedback messages of the first set of feedback messages with zeros, where a length of each of the one or more modified feedback messages includes a maximum length associated with feedback messages.
  • the length transmitter 855 may be configured as or otherwise support a means for transmitting an indication of the maximum length to the second device, where the second set of feedback message includes the indication.
  • the delay manager 860 may be configured as or otherwise support a means for determining a set of timing delays for transmitting the second set of feedback messages relative to a set of system frame numbers associated with the first set of feedback messages, where transmitting the second set of feedback messages is based on the set of timing delays.
  • the set of timing delays is associated with a set of timing thresholds preconfigured at the UE. In some examples, each timing delay of the set of timing delays is greater than each associated timing threshold of the set of timing thresholds.
  • the timing receiver 865 may be configured as or otherwise support a means for receiving a timing parameter from the second device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, where transmitting the second set of feedback messages is based on receiving the timing parameter.
  • control receiver 825 may be configured as or otherwise support a means for receiving a grant scheduling a third set of resources for transmitting the control signaling to one or more devices of the set of additional devices, where the control signaling includes the grant.
  • control transmitter 870 may be configured as or otherwise support a means for transmitting the control signaling to the one or more devices using the third set of resources.
  • control receiver 825 may be configured as or otherwise support a means for receiving a grant scheduling a fourth set of resources for receiving one or more downlink transmissions from the second device and a fifth set of resources for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, where the control signaling includes the grant.
  • the downlink receiver 845 may be configured as or otherwise support a means for receiving the one or more downlink transmissions from the second device using the fourth set of resources.
  • control transmitter 870 may be configured as or otherwise support a means for transmitting the control signaling and the one or more downlink transmissions to the one or more devices of the set of additional devices using the fifth set of resources, where receiving the first set of feedback messages includes receiving the first set of feedback messages in response to transmitting the control signaling and the one or more downlink transmissions.
  • the second device includes a base station. In some examples, the second device includes a UE.
  • FIG. 9 shows a diagram of a system 900 including a device 905 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 905 may be an example of or include the components of a device 605, a device 705, or a UE 115 as described herein.
  • the device 905 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof.
  • the device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 920, an input/output (I/O) controller 910, a transceiver 915, an antenna 925, a memory 930, code 935, and a processor 940.
  • These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 945) .
  • the I/O controller 910 may manage input and output signals for the device 905.
  • the I/O controller 910 may also manage peripherals not integrated into the device 905.
  • the I/O controller 910 may represent a physical connection or port to an external peripheral.
  • the I/O controller 910 may utilize an operating system such as or another known operating system.
  • the I/O controller 910 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 910 may be implemented as part of a processor, such as the processor 940.
  • a user may interact with the device 905 via the I/O controller 910 or via hardware components controlled by the I/O controller 910.
  • the device 905 may include a single antenna 925. However, in some other cases, the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the transceiver 915 may communicate bi-directionally, via the one or more antennas 925, wired, or wireless links as described herein.
  • the transceiver 915 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 915 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 925 for transmission, and to demodulate packets received from the one or more antennas 925.
  • the transceiver 915 may be an example of a transmitter 615, a transmitter 715, a receiver 610, a receiver 710, or any combination thereof or component thereof, as described herein.
  • the memory 930 may include random access memory (RAM) and read-only memory (ROM) .
  • the memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed by the processor 940, cause the device 905 to perform various functions described herein.
  • the code 935 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 935 may not be directly executable by the processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the memory 930 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic I/O system
  • the processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 940 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 940.
  • the processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting techniques for feedback codebook construction at relays in wireless communications systems) .
  • the device 905 or a component of the device 905 may include a processor 940 and memory 930 coupled to the processor 940, the processor 940 and memory 930 configured to perform various functions described herein.
  • the communications manager 920 may support wireless communication at a first device in accordance with examples as disclosed herein.
  • the communications manager 920 may be configured as or otherwise support a means for receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the communications manager 920 may be configured as or otherwise support a means for receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the communications manager 920 may be configured as or otherwise support a means for transmitting the second set of feedback messages to the second device using the second set of resources.
  • the device 905 may support techniques for feedback construction in wireless communications systems, such that the device 905 may exhibit an improved communication reliability, a reduced latency, an efficient resource utilization or improved coordination, among other benefits.
  • the communications manager 920 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 915, the one or more antennas 925, or any combination thereof.
  • the communications manager 920 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 920 may be supported by or performed by the processor 940, the memory 930, the code 935, or any combination thereof.
  • the code 935 may include instructions executable by the processor 940 to cause the device 905 to perform various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein, or the processor 940 and the memory 930 may be otherwise configured to perform or support such operations.
  • FIG. 10 shows a block diagram 1000 of a device 1005 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a base station 105 as described herein.
  • the device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020.
  • the device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1010 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 1015 may provide a means for transmitting signals generated by other components of the device 1005.
  • the transmitter 1015 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) .
  • the transmitter 1015 may be co-located with a receiver 1010 in a transceiver component.
  • the transmitter 1015 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
  • the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include a processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
  • a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory) .
  • the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the functions of the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure)
  • the communications manager 1020 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 1010, the transmitter 1015, or both.
  • the communications manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated in combination with the receiver 1010, the transmitter 1015, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 1020 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the communications manager 1020 may be configured as or otherwise support a means for transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the communications manager 1020 may be configured as or otherwise support a means for receiving the second set of feedback messages from the first device using the second set of resources.
  • the device 1005 may support techniques for feedback in wireless communications systems such that the device 1005 may exhibit an improved communication reliability, a reduced latency, an efficient resource utilization or improved coordination, among other benefits.
  • FIG. 11 shows a block diagram 1100 of a device 1105 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 1105 may be an example of aspects of a device 1005 or a base station 105 as described herein.
  • the device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120.
  • the device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1110 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) . Information may be passed on to other components of the device 1105.
  • the receiver 1110 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 1115 may provide a means for transmitting signals generated by other components of the device 1105.
  • the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for feedback codebook construction at relays in wireless communications systems) .
  • the transmitter 1115 may be co-located with a receiver 1110 in a transceiver component.
  • the transmitter 1115 may utilize a single antenna or a set of multiple antennas.
  • the device 1105 may be an example of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 1120 may include a control component 1125 a feedback receiver 1130, or any combination thereof.
  • the communications manager 1120 may be an example of aspects of a communications manager 1020 as described herein.
  • the communications manager 1120, or various components thereof may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver 1110, the transmitter 1115, or both.
  • the communications manager 1120 may receive information from the receiver 1110, send information to the transmitter 1115, or be integrated in combination with the receiver 1110, the transmitter 1115, or both to receive information, transmit information, or perform various other operations as described herein.
  • the communications manager 1120 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the control component 1125 may be configured as or otherwise support a means for transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the feedback receiver 1130 may be configured as or otherwise support a means for receiving the second set of feedback messages from the first device using the second set of resources.
  • FIG. 12 shows a block diagram 1200 of a communications manager 1220 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the communications manager 1220 may be an example of aspects of a communications manager 1020, a communications manager 1120, or both, as described herein.
  • the communications manager 1220, or various components thereof may be an example of means for performing various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein.
  • the communications manager 1220 may include a control component 1225, a feedback receiver 1230, a timing transmitter 1235, a downlink transmitter 1240, an identifier receiver 1245, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the communications manager 1220 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the control component 1225 may be configured as or otherwise support a means for transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving the second set of feedback messages from the first device using the second set of resources.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving the first set of feedback messages from the first device using the second set of resources, where the second set of feedback messages includes the first set of feedback messages.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving a first feedback message from the first device, the first feedback message including a concatenation of one or more feedback messages of the first set of feedback messages in an order based on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving a second feedback message from the first device, the second feedback message including one or more feedback messages associated of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving a third feedback message from the first device, the third feedback message including a concatenation of one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices.
  • the identifier receiver 1245 may be configured as or otherwise support a means for receiving a first indication of one or more identifiers associated with the one or more devices of the set of additional devices from the first device and a second indication of one or more lengths associated with the one or more feedback messages, where the third feedback message includes the first indication and the second indication.
  • the feedback receiver 1230 may be configured as or otherwise support a means for receiving a fourth feedback message from the first device, the fourth feedback message including a combination of one or more feedback indicators included in one or more feedback messages of the first set of feedback messages.
  • the timing transmitter 1235 may be configured as or otherwise support a means for transmitting a timing parameter to the first device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, where receiving the second set of feedback messages is based on transmitting the timing parameter.
  • control component 1225 may be configured as or otherwise support a means for transmitting a grant scheduling a third set of resources for the first device to use for transmitting the control signaling to one or more devices of the set of additional devices, where the control signaling includes the grant.
  • control component 1225 may be configured as or otherwise support a means for transmitting a grant scheduling a fourth set of resources for the first device to use for receiving one or more downlink transmissions from the base station and a fifth set of resources for the first device to use for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, where the control signaling includes the grant.
  • the downlink transmitter 1240 may be configured as or otherwise support a means for transmitting the one or more downlink transmissions to the first device, where receiving the second set of feedback messages includes receiving the second set of feedback messages based on transmitting the one or more downlink transmissions.
  • FIG. 13 shows a diagram of a system 1300 including a device 1305 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the device 1305 may be an example of or include the components of a device 1005, a device 1105, or a base station 105 as described herein.
  • the device 1305 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof.
  • the device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1320, a network communications manager 1310, a transceiver 1315, an antenna 1325, a memory 1330, code 1335, a processor 1340, and an inter-station communications manager 1345.
  • These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1350) .
  • the network communications manager 1310 may manage communications with a core network 130 (e.g., via one or more wired backhaul links) .
  • the network communications manager 1310 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the device 1305 may include a single antenna 1325. However, in some other cases the device 1305 may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the transceiver 1315 may communicate bi-directionally, via the one or more antennas 1325, wired, or wireless links as described herein.
  • the transceiver 1315 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1315 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1325 for transmission, and to demodulate packets received from the one or more antennas 1325.
  • the transceiver 1315 may be an example of a transmitter 1015, a transmitter 1115, a receiver 1010, a receiver 1110, or any combination thereof or component thereof, as described herein.
  • the memory 1330 may include RAM and ROM.
  • the memory 1330 may store computer-readable, computer-executable code 1335 including instructions that, when executed by the processor 1340, cause the device 1305 to perform various functions described herein.
  • the code 1335 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the memory 1330 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 1340 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 1340.
  • the processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting techniques for feedback codebook construction at relays in wireless communications systems) .
  • the device 1305 or a component of the device 1305 may include a processor 1340 and memory 1330 coupled to the processor 1340, the processor 1340 and memory 1330 configured to perform various functions described herein.
  • the inter-station communications manager 1345 may manage communications with other base stations 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1345 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1345 may provide an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between base stations 105.
  • the communications manager 1320 may support wireless communication at a base station in accordance with examples as disclosed herein.
  • the communications manager 1320 may be configured as or otherwise support a means for transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the communications manager 1320 may be configured as or otherwise support a means for receiving the second set of feedback messages from the first device using the second set of resources.
  • the device 1305 may support techniques for feedback codebook construction in wireless communications systems such that the device 1305 may exhibit an improved communication reliability, a reduced latency, an efficient resource utilization or improved coordination, among other benefits.
  • the communications manager 1320 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1315, the one or more antennas 1325, or any combination thereof.
  • the communications manager 1320 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1320 may be supported by or performed by the processor 1340, the memory 1330, the code 1335, or any combination thereof.
  • the code 1335 may include instructions executable by the processor 1340 to cause the device 1305 to perform various aspects of techniques for feedback codebook construction at relays in wireless communications systems as described herein, or the processor 1340 and the memory 1330 may be otherwise configured to perform or support such operations.
  • FIG. 14 shows a flowchart illustrating a method 1400 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the operations of the method 1400 may be implemented by a UE or its components as described herein.
  • the operations of the method 1400 may be performed by a UE 115 as described with reference to FIGs. 1 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the operations of 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed by a control receiver 825 as described with reference to FIG. 8.
  • the method may include receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the operations of 1410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed by a feedback component 830 as described with reference to FIG. 8.
  • the method may include transmitting the second set of feedback messages to the second device using the second set of resources.
  • the operations of 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed by a feedback transmitter 835 as described with reference to FIG. 8.
  • FIG. 15 shows a flowchart illustrating a method 1500 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the operations of the method 1500 may be implemented by a UE or its components as described herein.
  • the operations of the method 1500 may be performed by a UE 115 as described with reference to FIGs. 1 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the operations of 1505 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed by a control receiver 825 as described with reference to FIG. 8.
  • the method may include receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the operations of 1510 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed by a feedback component 830 as described with reference to FIG. 8.
  • the method may include transmitting the first set of feedback messages to the second device using the second set of resources, where the second set of feedback messages includes the first set of feedback messages.
  • the operations of 1515 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed by a feedback transmitter 835 as described with reference to FIG. 8.
  • FIG. 16 shows a flowchart illustrating a method 1600 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the operations of the method 1600 may be implemented by a UE or its components as described herein.
  • the operations of the method 1600 may be performed by a UE 115 as described with reference to FIGs. 1 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the operations of 1605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed by a control receiver 825 as described with reference to FIG. 8.
  • the method may include receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the operations of 1610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a feedback component 830 as described with reference to FIG. 8.
  • the method may include determining a third feedback message based on one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices.
  • the operations of 1615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed by a feedback manager 840 as described with reference to FIG. 8.
  • the method may include transmitting the third feedback message using the second set of resources, where the second set of feedback messages includes the third feedback message.
  • the operations of 1620 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1620 may be performed by a feedback transmitter 835 as described with reference to FIG. 8.
  • FIG. 17 shows a flowchart illustrating a method 1700 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the operations of the method 1700 may be implemented by a UE or its components as described herein.
  • the operations of the method 1700 may be performed by a UE 115 as described with reference to FIGs. 1 through 9.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the operations of 1705 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed by a control receiver 825 as described with reference to FIG. 8.
  • the method may include receiving the first set of feedback messages from the set of additional devices using the first set of resources.
  • the operations of 1710 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by a feedback component 830 as described with reference to FIG. 8.
  • the method may include determining one or more feedback indicators included in one or more feedback messages of the first set of feedback messages based on deconstructing the one or more feedback messages.
  • the operations of 1715 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed by a feedback manager 840 as described with reference to FIG. 8.
  • the method may include determining a third feedback message based on combining the one or more feedback indicators.
  • the operations of 1720 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1720 may be performed by a feedback manager 840 as described with reference to FIG. 8.
  • the method may include transmitting the third feedback message using the second set of resources, where the second set of feedback messages includes the third feedback message.
  • the operations of 1725 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1725 may be performed by a feedback transmitter 835 as described with reference to FIG. 8.
  • FIG. 18 shows a flowchart illustrating a method 1800 that supports techniques for feedback codebook construction at relays in wireless communications systems in accordance with aspects of the present disclosure.
  • the operations of the method 1800 may be implemented by a base station or its components as described herein.
  • the operations of the method 1800 may be performed by a base station 105 as described with reference to FIGs. 1 through 5 and 10 through 13.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages.
  • the operations of 1805 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed by a control component 1225 as described with reference to FIG. 12.
  • the method may include receiving the second set of feedback messages from the first device using the second set of resources.
  • the operations of 1810 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed by a feedback receiver 1230 as described with reference to FIG. 12.
  • a method for wireless communication at a first device comprising: receiving control signaling from a second device, the control signaling scheduling a first set of resources for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages; receiving the first set of feedback messages from the set of additional devices using the first set of resources; and transmitting the second set of feedback messages to the second device using the second set of resources.
  • Aspect 2 The method of aspect 1, wherein transmitting the second set of feedback messages comprises: transmitting the first set of feedback messages to the second device using the second set of resources, wherein the second set of feedback messages comprises the first set of feedback messages.
  • Aspect 3 The method of aspect 1, further comprising: determining a first feedback message based at least in part on concatenating one or more feedback messages of the first set of feedback messages in an order based at least in part on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, wherein transmitting the second set of feedback messages comprises transmitting the first feedback message.
  • Aspect 4 The method of aspect 1, wherein transmitting the second set of feedback messages comprises: determining a second feedback message comprising one or more feedback messages of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a third device of the set of additional devices, wherein transmitting the second set of feedback messages comprises transmitting the second feedback message.
  • Aspect 5 The method of aspect 1, further comprising: determining a third feedback message based at least in part on one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices, wherein transmitting the second set of feedback messages comprises transmitting the third feedback message.
  • Aspect 6 The method of aspect 5, wherein determining the third feedback message comprises: determining the third feedback message based at least in part on concatenating the one or more feedback messages of the first set of feedback messages.
  • Aspect 7 The method of aspect 6, further comprising: transmitting an indication of one or more identifiers associated with the one or more devices of the set of additional devices to the base station, wherein the third feedback message comprises the indication.
  • Aspect 8 The method of any of aspects 6 through 7, further comprising: transmitting an indication of one or more lengths associated with the one or more feedback messages of the first set of feedback messages to the second device, wherein the third feedback message comprises the indication.
  • Aspect 9 The method of aspect 5, wherein determining the third feedback message comprises: determining one or more feedback indicators included in the one or more feedback messages based at least in part on deconstructing the one or more feedback messages; and determining the third feedback message based at least in part on combining the one or more feedback indicators.
  • Aspect 10 The method of aspect 9, further comprising: receiving an indication of one or more feedback parameters from the second device, the feedback parameters configured to indicate a location of each of the one or more feedback indicators included in the third feedback message, wherein the one or more feedback parameters comprise one or more counter downlink assignment indices and one or more total downlink assignment indices.
  • Aspect 11 The method of any of aspects 1 through 10, further comprising: receiving one or more downlink transmissions from the second device; and determining a fourth feedback message based at least in part on receiving the one or more downlink transmissions, wherein transmitting the second set of feedback messages comprises transmitting the fourth feedback message.
  • Aspect 12 The method of any of aspects 1 through 11, further comprising: determining one or more modified feedback messages based at least in part on padding each of the one or more feedback messages of the first set of feedback messages with zeros, wherein a length of each of the one or more modified feedback messages comprises a maximum length associated with feedback messages; and transmitting an indication of the maximum length to the second device, wherein the second set of feedback message comprises the indication.
  • Aspect 13 The method of any of aspects 1 through 12, further comprising: determining a set of timing delays for transmitting the second set of feedback messages relative to a set of system frame numbers associated with the first set of feedback messages, wherein transmitting the second set of feedback messages is based at least in part on the set of timing delays.
  • Aspect 14 The method of aspect 13, wherein the set of timing delays is associated with a set of timing thresholds preconfigured at the UE; and each timing delay of the set of timing delays is greater than each associated timing threshold of the set of timing thresholds.
  • Aspect 15 The method of any of aspects 1 through 14, wherein receiving the control signaling comprises: receiving a timing parameter from the second device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, wherein transmitting the second set of feedback messages is based at least in part on receiving the timing parameter.
  • Aspect 16 The method of any of aspects 1 through 15, further comprising: receiving a grant scheduling a third set of resources for transmitting the control signaling to one or more devices of the set of additional devices, wherein the control signaling comprises the grant; and transmitting the control signaling to the one or more devices using the third set of resources.
  • Aspect 17 The method of any of aspects 1 through 16, further comprising: receiving a grant scheduling a fourth set of resources for receiving one or more downlink transmissions from the second devices and a fifth set of resources for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, wherein the control signaling comprises the grant; receiving the one or more downlink transmissions from the second device using the fourth set of resources; and transmitting the control signaling and the one or more downlink transmissions to the one or more devices of the set of additional devices using the fifth set of resources, wherein receiving the first set of feedback messages comprises receiving the first set of feedback messages in response to transmitting the control signaling and the one or more downlink transmissions.
  • Aspect 18 The method of any of aspects 1 through 17, wherein the second device comprises a base station; or the second device comprises a UE.
  • a method for wireless communication at a base station comprising: transmitting control signaling to a first device, the control signaling scheduling a first set of resources for the first device to use for receiving a first set of feedback messages from a set of additional devices and a second set of resources for transmitting a second set of feedback messages to the base station, the second set of feedback messages associated with the first set of feedback messages; receiving the second set of feedback messages from the first device using the second set of resources.
  • Aspect 20 The method of aspect 19, wherein receiving the second set of feedback messages comprises: receiving the first set of feedback messages from the first device using the second set of resources, wherein the second set of feedback messages comprises the first set of feedback messages.
  • Aspect 21 The method of aspect 19, wherein receiving the second set of feedback messages comprises: receiving a first feedback message from the first device, the first feedback message comprising a concatenation of one or more feedback messages of the first set of feedback messages in an order based at least in part on a timing associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • Aspect 22 The method of aspect 19, further receiving the second set of feedback messages comprises: receiving a second feedback message from the first device, the second feedback message comprising one or more feedback messages associated of the first set of feedback messages and one or more indications of system frame numbers associated with the one or more feedback messages, the one or more feedback messages associated with a second device of the set of additional devices.
  • Aspect 23 The method of aspect 19, wherein receiving the second set of feedback messages comprises: receiving a third feedback message from the first device, the third feedback message comprising a concatenation of one or more feedback messages of the first set of feedback messages, the one or more feedback messages associated with one or more devices of the set of additional devices.
  • Aspect 24 The method of aspect 23, further comprising: receiving a first indication of one or more identifiers associated with the one or more devices of the set of additional devices from the first device and a second indication of one or more lengths associated with the one or more feedback messages, wherein the third feedback message comprises the first indication and the second indication.
  • Aspect 25 The method of aspect 19, wherein receiving the second set of feedback messages comprises: receiving a fourth feedback message from the first device, the fourth feedback message comprising a combination of one or more feedback indicators included in one or more feedback messages of the first set of feedback messages.
  • Aspect 26 The method of any of aspects 19 through 25, wherein transmitting the control signaling comprises: transmitting a timing parameter to the first device indicating a timing for transmitting the second set of feedback messages relative to receiving the first set of feedback messages, wherein receiving the second set of feedback messages is based at least in part on transmitting the timing parameter.
  • Aspect 27 The method of any of aspects 19 through 26, further comprising: transmitting a grant scheduling a third set of resources for the first device to use for transmitting the control signaling to one or more devices of the set of additional devices, wherein the control signaling comprises the grant.
  • Aspect 28 The method of any of aspects 19 through 27, further comprising: transmitting a grant scheduling a fourth set of resources for the first device to use for receiving one or more downlink transmissions from the base station and a fifth set of resources for the first device to use for transmitting the control signaling and the one or more downlink transmissions to one or more devices of the set of additional devices, wherein the control signaling comprises the grant; and transmitting the one or more downlink transmissions to the first device, wherein receiving the second set of feedback messages comprises receiving the second set of feedback messages based at least in part on transmitting the one or more downlink transmissions.
  • Aspect 29 An apparatus for wireless communication at a first device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 18.
  • Aspect 30 An apparatus for wireless communication at a first device, comprising at least one means for performing a method of any of aspects 1 through 18.
  • Aspect 31 A non-transitory computer-readable medium storing code for wireless communication at a first device, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 18.
  • Aspect 32 An apparatus for wireless communication at a base station, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 19 through 28.
  • Aspect 33 An apparatus for wireless communication at a base station, comprising at least one means for performing a method of any of aspects 19 through 28.
  • Aspect 34 A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform a method of any of aspects 19 through 28.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a 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 in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the 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 medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
  • determining encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data in a memory) and the like. Also, “determining” can include resolving, selecting, choosing, establishing and other such similar actions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs de communication sans fil. Les techniques décrites permettent à un premier dispositif de recevoir une signalisation de commande en provenance d'un second dispositif indiquant un premier ensemble de ressources pour recevoir un premier ensemble de messages de rétroaction provenant de dispositifs supplémentaires et un second ensemble de ressources pour transmettre un second ensemble de messages de rétroaction au second dispositif. Le premier dispositif peut recevoir et transmettre en conséquence des messages de rétroaction. Dans certains exemples, le premier dispositif peut transmettre séparément des messages de rétroaction reçus de différents dispositifs supplémentaires. Dans certains exemples, le premier dispositif peut communiquer conjointement des messages de rétroaction reçus de dispositifs supplémentaires. La mise en œuvre de certains aspects de la présente divulgation peut fournir des techniques de rétroaction dans des systèmes de communication sans fil qui prennent en charge des configurations multi-relais.
PCT/CN2021/080963 2021-03-16 2021-03-16 Techniques de construction de livre de codes de rétroaction au niveau de relais dans des systèmes de communication sans fil WO2022193114A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020067728A1 (fr) * 2018-09-28 2020-04-02 엘지전자 주식회사 Procédé de renvoi d'informations dans un système de communication sans fil et terminal utilisant ledit procédé
WO2020125990A1 (fr) * 2018-12-20 2020-06-25 Huawei Technologies Co., Ltd. Dispositif et procédé de prise en charge d'un mécanisme de rétroaction
WO2021016997A1 (fr) * 2019-08-01 2021-02-04 Lenovo (Beijing) Limited Appareil et procédé de rétroaction harq-ack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020067728A1 (fr) * 2018-09-28 2020-04-02 엘지전자 주식회사 Procédé de renvoi d'informations dans un système de communication sans fil et terminal utilisant ledit procédé
WO2020125990A1 (fr) * 2018-12-20 2020-06-25 Huawei Technologies Co., Ltd. Dispositif et procédé de prise en charge d'un mécanisme de rétroaction
WO2021016997A1 (fr) * 2019-08-01 2021-02-04 Lenovo (Beijing) Limited Appareil et procédé de rétroaction harq-ack

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Sidelink UE-to-NW Relaying for Wearable and IoT Use Cases", 3GPP DRAFT; R1-1707332 INTEL - FED2D UE-TO-NW, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Hangzhou; 20170515 - 20170519, 14 May 2017 (2017-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051272545 *
ZTE: "Considerations on the UE-to-Network Relays", 3GPP DRAFT; R2-151169 - CONSIDERATIONS ON THE UE-TO-NETWORK RELAYS, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Bratislava, Slovakia; 20150420 - 20150424, 19 April 2015 (2015-04-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP050936143 *

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