WO2021203326A1 - Attribution de ressources pour une nouvelle liaison latérale sans licence radio (nr-u) - Google Patents

Attribution de ressources pour une nouvelle liaison latérale sans licence radio (nr-u) Download PDF

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Publication number
WO2021203326A1
WO2021203326A1 PCT/CN2020/083825 CN2020083825W WO2021203326A1 WO 2021203326 A1 WO2021203326 A1 WO 2021203326A1 CN 2020083825 W CN2020083825 W CN 2020083825W WO 2021203326 A1 WO2021203326 A1 WO 2021203326A1
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WIPO (PCT)
Prior art keywords
array
interlace
frequency domain
wireless communication
index number
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PCT/CN2020/083825
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English (en)
Inventor
Changlong Xu
Jing Sun
Xiaoxia Zhang
Chih-Hao Liu
Yisheng Xue
Ozcan Ozturk
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Qualcomm Incorporated
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Priority to PCT/CN2020/083825 priority Critical patent/WO2021203326A1/fr
Publication of WO2021203326A1 publication Critical patent/WO2021203326A1/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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Definitions

  • the technology discussed below relates generally to wireless communication systems, and more particularly, to resource allocation for New Radio -Unlicensed (NR-U) sidelink.
  • NR-U New Radio -Unlicensed
  • Wireless communication devices utilizing NR-U for sidelink communications may allocate frequency domain resources for the sidelink communications without involvement of a network access node.
  • a network access node When operating without the network access node monitoring and controlling allocation of frequency domain resources, collisions between sidelink communications of at least two wireless communication devices may occur.
  • a method of frequency domain resource allocation of a wireless communication device in a wireless communication network includes forming a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain, mapping each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, selecting an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number. and allocating, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • PRB physical resource block
  • a wireless communication device in a wireless communication network may include a wireless transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory.
  • the processor and the memory may be configured to form a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain, map each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, select an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number, and allocate, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • PRB physical resource block
  • the wireless communication device may include means for forming a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain, means for mapping each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, means for selecting an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number, and means for allocating, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • PRB physical resource block
  • an article of manufacture for use by a wireless communication device in a wireless communication network may include a non-transitory computer-readable medium that stores instructions that maybe executable by one or more processors of the wireless communication device.
  • the instructions may include in instructions to form a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain, map each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, select an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number, and allocate, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • PRB physical resource block
  • FIG. 1 is a schematic illustration of a wireless communication system according to some aspects.
  • FIG. 2 is a schematic illustration of an example of a radio access network according to some aspects.
  • FIG. 3 illustrates an example of a wireless communication network 300 configured to support device-to-device (D2D) (e.g., sidelink) communication according to some aspects.
  • D2D device-to-device
  • FIG. 4 is a schematic illustration of an exemplary subframe showing an OFDM resource grid according to some aspects.
  • FIG. 5 depicts two OFDM grid portions according to some aspects.
  • FIG. 6 is an example of a plurality of OFDM symbols arranged in and OFDM time-frequency resource grid according to some aspects.
  • FIGs. 6A, 6B, and 6C constitute FIG. 6.
  • FIG. 7 is an illustration of an OFDM resource grid according to some aspects.
  • FIGs. 7A, 7B, 7C, and 7D constitute FIG. 7.
  • FIG. 8 is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 9 is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 10 is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 11A is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 11B is a series of common resource blocks and physical resource blocks relevant to FIG. 11A according to some aspects.
  • FIG. 12A is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 12B is a series of common resource blocks and physical resource blocks relevant to FIG. 12A according to some aspects.
  • FIG. 13A is an exemplary representation of a two-dimensional array according to some aspects.
  • FIG. 13B is a series of common resource blocks and physical resource blocks relevant to FIG. 13A according to some aspects.
  • FIG. 14 is a block diagram illustrating an example of a hardware implementation of a wireless communication device employing a processing system according to some aspects.
  • FIGs. 15A-15E illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 16A-16C illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 17A-17B illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 18A-18D illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 19A-19C illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 20A-20C illustrate examples of a two-dimensional array according to some aspects.
  • FIGs. 21A-21C illustrate examples of a two-dimensional array according to some aspects.
  • FIG. 22 illustrates one example of a two-dimensional array of frequency resources according to some aspects.
  • FIG. 23 illustrates one example of a two-dimensional array of frequency resources according to some aspects.
  • FIG. 24 illustrates one example of a two-dimensional array of frequency resources according to some aspects.
  • FIG. 25 is a flow chart illustrating an exemplary process of frequency domain resource allocation of a wireless communication device in a wireless communication network according to some aspects.
  • FIG. 26 is a flow chart illustrating an exemplary process of frequency domain resource allocation of a wireless communication device in a wireless communication network according to some aspects.
  • Implementations may range a spectrum from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments.
  • transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor (s) , interleaver, adders/summers, etc. ) .
  • innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
  • the next generation of radio access technology includes provisions that facilitate communication between two wireless communication devices, where the communication does not need to be relayed through a network access device, such as a base station, an access point, an eNode B, a gNode B, or the like. These provisions may be referred to, for example, as sidelink communications. Sidelink communications allows wireless communication devices to interact with each other and with enabled automobiles, infrastructure, and pedestrians, to name a few. In general, the frequency domain resources utilized for 5G NR fall into three categories, licensed spectrum, shared spectrum, and unlicensed spectrum.
  • 5G NR When configured for use in the unlicensed spectrum, 5G NR may be referred to as New Radio-Unlicensed (NR-U) .
  • NR-U communications may be made using sidelink. If NR-U communications are conveyed using sidelink, those communications need not be relayed through a network access node. However, the network access node may still control allocation of frequency domain resources for the sidelink communications. When a network access node allocates frequency domain resources for sidelink communications, the network access node may keep track of all frequency allocations to avoid collisions between sidelink communications of wireless communication devices. Still, there is a mode in which the wireless network devices themselves allocate frequency domain resources for sidelink communications. Wireless communication devices utilizing NR-U for sidelink communications may use this mode.
  • a network access device is not needed as a communications relay and is not needed for frequency domain resource allocation.
  • this mode which does not use a network access device to control frequency domain allocations, there is a potential for collisions between sidelink communications transmitted from at least two wireless communication device.
  • Methods, apparatus, and articles of manufacture for use by wireless communication devices in a wireless communication network, as described herein, may help to avoid collisions of sidelink communications.
  • the various concepts presented throughout this disclosure may be implemented across a broad variety of telecommunication systems, network architectures, and communication standards.
  • the wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and a wireless communication device 106 (e.g., a user equipment (UE) ) .
  • the wireless communication device 106 may be enabled to carry out data communication with an external data network 110, such as (but not limited to) the Internet.
  • the RAN 104 may implement any suitable wireless communication technology or technologies to provide radio access to the wireless communication device 106.
  • the RAN 104 may operate according to 3 rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G NR.
  • 3GPP 3 rd Generation Partnership Project
  • NR New Radio
  • the wireless communication device 106 may communicate with a second wireless communication device 122 via a sidelink 124 communication (e.g. a scheduled-entity-to-scheduled entity communication) .
  • the sidelink 124 communication may be made in an unlicensed frequency domain, using radio resources operating according to NR-U specifications, for example.
  • the RAN 104 may operate under a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE.
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • the 3GPP refers to this hybrid RAN as a next-generation RAN, or NG-RAN.
  • NG-RAN next-generation RAN
  • the RAN 104 includes a plurality of scheduling entities (schematically illustrated as scheduling entity 108) also referred to herein as base stations.
  • a base station is a network element in a radio access network responsible for radio transmission and reception in one or more cells to or from a wireless communication device.
  • a base station may variously be referred to by those skilled in the art as a base transceiver station (BTS) , a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , an access point (AP) , a Node B (NB) , an eNode B (eNB) , a gNode B (gNB) , or some other suitable terminology.
  • BTS basic service set
  • ESS extended service set
  • AP access point
  • NB Node B
  • eNB eNode B
  • gNB gNode B
  • the RAN 104 is further illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus may be referred to as wireless communication devices (e.g., a user equipment (UEs) in 3GPP standards) , but may also be referred to by those skilled in the art as a mobile station (MS) , a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a remote device, a mobile subscriber station, an access terminal (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • a wireless communication device may be an apparatus (e.g., a mobile apparatus) that provides a user with access to network services.
  • a “mobile” apparatus need not necessarily have a capability to move and may be stationary.
  • the term mobile apparatus or mobile device broadly refers to a diverse array of devices and technologies.
  • wireless communication devices may include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. electrically coupled to each other.
  • a mobile apparatus examples include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC) , a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA) , and a broad array of embedded systems, e.g., corresponding to an “Internet of things” (IoT) .
  • IoT Internet of things
  • a mobile apparatus may additionally be an automotive or other transportation vehicle, a remote sensor or actuator, a robot or robotics device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer and/or wearable device, such as eyewear, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.
  • GPS global positioning system
  • a mobile apparatus may additionally be a digital home or smart home device such as a home audio, video, and/or multimedia device, an appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • a mobile apparatus may additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electric power (e.g., a smart grid) , lighting, water, etc.; an industrial automation and enterprise device; a logistics controller; agricultural equipment; military defense equipment, vehicles, aircraft, ships, and weaponry, etc.
  • a mobile apparatus may provide for connected medicine or telemedicine support, e.g., health care at a distance.
  • Telehealth devices may include telehealth monitoring devices and telehealth administration devices, whose communication may be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transport of critical service data, and/or relevant QoS for transport of critical service data.
  • Wireless communication between the RAN 104 and the wireless communication device 106 may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e.g., scheduling entity 108) to one or more wireless communication devices (e.g., similar to wireless communication device 106) may be referred to as downlink (DL) transmission.
  • DL downlink
  • the term downlink may refer to a point-to-multipoint transmission originating at a scheduling entity 108 (described further below; e.g., base station) .
  • Another way to describe this scheme may be to use the term broadcast channel multiplexing.
  • Uplink Transmissions from a wireless communication device (e.g., wireless communication device 106) to a scheduling entity 108 (e.g., a base station) may be referred to as uplink (UL) transmissions.
  • UL uplink
  • the term uplink may refer to a point-to-point transmission originating at a scheduled entity (described further below; e.g., wireless communication device 106) .
  • a scheduling entity 108 e.g., a base station
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communication, a plurality of wireless communication device (e.g., a plurality of wireless communication devices 106) , which may be scheduled entities, may utilize resources allocated by the scheduling entity 108.
  • Base stations represented in both the singular and the plural by scheduling entity 108, are not the only entities that may function as scheduling entities. That is, in some examples, a wireless communication device may function as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other wireless communication devices) .
  • a scheduling entity 108 may broadcast downlink traffic 112 to one or more scheduled entities (e.g. one or more wireless communication devices 106) .
  • the scheduling entity 108 is a node or device responsible for scheduling traffic in a wireless communication network, including the downlink traffic 112 and, in some examples, uplink traffic 116 from one or more scheduled entities (e.g. one or more wireless communication devices 106) to the scheduling entity 108.
  • the scheduled entity e.g.
  • one or more wireless communication device 106) is a node or device that receives downlink control information 114, including but not limited to scheduling information (e.g., a grant) , synchronization or timing information, or other control information from another entity in the wireless communication network such as the scheduling entity 108.
  • scheduling information e.g., a grant
  • synchronization or timing information e.g., synchronization or timing information
  • scheduling entities may include a backhaul interface for communication with a backhaul portion 120 of the wireless communication system 100.
  • the backhaul portion 120 may provide a link between a scheduling entity 108 and the core network 102.
  • a backhaul network may provide interconnection between the respective base stations (each similar to scheduling entity 108) .
  • Various types of backhaul interfaces may be employed, such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • the core network 102 may be a part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104.
  • the core network 102 may be configured according to 5G standards (e.g., 5GC) .
  • the core network 102 may be configured according to a 4G evolved packet core (EPC) , or any other suitable standard or configuration.
  • 5G standards e.g., 5GC
  • EPC 4G evolved packet core
  • the various concepts presented throughout this disclosure may be implemented across a broad variety of telecommunication systems, network architectures, and communication standards.
  • the RAN 200 may implement any suitable wireless communication technology or technologies to provide radio access.
  • the RAN 200 may operate according to 3 rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G or 5G NR.
  • 3GPP 3 rd Generation Partnership Project
  • NR New Radio
  • the RAN 200 may operate under NR-U specifications.
  • the RAN 200 may operate under a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE.
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • Wireless communication devices 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242 may likewise operate according to 5G NR, NR-U, or the hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, among others.
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • the geographic region covered by the RAN 200 may be divided into a number of cellular regions (cells) that can be uniquely identified by a wireless communication device based on an identification broadcasted over a geographical area from one access point or base station.
  • FIG. 2 illustrates cells 202, 204, 206, and 208, each of which may include one or more sectors (not shown) .
  • Cells 202, 204, and 206 may be referred to as macrocells and cell 208 may be referred to as a small cell.
  • a sector is a sub-area of a cell. All sectors within one cell are served by the same base station.
  • a radio link within a sector can be identified by a single logical identification belonging to that sector.
  • the multiple sectors within a cell can be formed by groups of antennas with each antenna responsible for communication with wireless communication devices in a portion of the cell.
  • a respective base station serves each cell.
  • a base station is a network element in a radio access network responsible for radio transmission and reception in one or more cells to or from a wireless communication device.
  • a BS may also be referred to by those skilled in the art as a base transceiver station (BTS) , a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , an access point (AP) , a Node B (NB) , an eNode B (eNB) , a gNode B (gNB) or some other suitable terminology.
  • BTS base transceiver station
  • ESS extended service set
  • AP access point
  • NB Node B
  • eNB eNode B
  • gNB gNode B
  • FIG. 2 two base stations, base station 210 and base station 212 are shown in cells 202 and 204; and a third base station, base station 214, is shown controlling a remote radio head (RRH) 216 in cell 206.
  • a base station can have an integrated antenna or can be connected to an antenna or RRH 216 by feeder cables.
  • cells 202, 204, and 206 may be referred to as macrocells, as the base stations 210, 212, and 214 support cells having a large size.
  • a base station 218 is shown in the cell 208 (e.g., a small cell, a microcell, picocell, femtocell, home base station, home Node B, home eNode B, etc. ) which may overlap with one or more macrocells.
  • the cell 208 may be referred to as a small cell, as the base station 218 supports a cell having a relatively small size. Cell sizing can be done according to system design as well as component constraints.
  • the RAN 200 may include any number of wireless base stations and cells.
  • a relay node may be deployed to extend the size or coverage area of a given cell.
  • the base stations 210, 212, 214, 218 provide wireless access points to a core network for any number of mobile apparatuses.
  • FIG. 2 further includes a quadcopter or drone, which may be configured to function as a base station, or more specifically as a mobile base station 220. That is, in some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station 220 such as a quadcopter or drone. According to some aspects, the quadcopter or drone may be configured to function as a wireless communication device (e.g., a UE) .
  • a wireless communication device e.g., a UE
  • base stations may include a backhaul interface for communication with a backhaul portion (not shown) of the network.
  • the backhaul may provide a link between a base station and a core network (not shown) , and in some examples, the backhaul may provide interconnection between the respective base stations.
  • the core network may be a part of a wireless communication system and may be independent of the radio access technology used in the radio access network.
  • Various types of backhaul interfaces may be employed, such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • the RAN 200 is illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus is commonly referred to as user equipment (UE) in standards and specifications promulgated by the 3rd Generation Partnership Project (3GPP) , but may also be referred to by those skilled in the art as a mobile station (MS) , a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • UE user equipment
  • 3GPP 3rd Generation Partnership Project
  • a mobile apparatus is generally referred to as a wireless communication device.
  • a wireless communication device may be an apparatus that provides a user with access to network services.
  • wireless communication device may also be an apparatus that provides a user with an ability to communicate with other wireless communication devices without having to relay the communications through the network, using, for example, sidelink.
  • a “mobile” apparatus need not necessarily have a capability to move and may be stationary.
  • the term mobile apparatus or mobile device broadly refers to a diverse array of devices and technologies.
  • some non-limiting examples of a mobile apparatus include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC) , a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA) , and a broad array of embedded systems, e.g., corresponding to an “Internet of things” (IoT) .
  • IoT Internet of things
  • a mobile apparatus may additionally be an automotive or other transportation vehicle, a remote sensor or actuator, a robot or robotics device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer and/or wearable device, such as eyewear, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.
  • GPS global positioning system
  • a mobile apparatus may additionally be a digital home or smart home device such as a home audio, video, and/or multimedia device, an appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • a mobile apparatus may additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electric power (e.g., a smart grid) , lighting, water, etc.; an industrial automation and enterprise device; a logistics controller; agricultural equipment; military defense equipment, vehicles, aircraft, ships, and weaponry, etc.
  • a mobile apparatus may provide for connected medicine or telemedicine support, i.e., health care at a distance.
  • Telehealth devices may include telehealth monitoring devices and telehealth administration devices, whose communication may be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transport of critical service data, and/or relevant QoS for transport of critical service data.
  • the cells may include wireless communication devices that may be in communication with one or more sectors of each cell.
  • wireless communication devices 222 and 224 may be in communication with base station 210; wireless communication devices 226 and 228 may be in communication with base station 212; wireless communication devices 230 and 232 may be in communication with base station 214 by way of RRH 216; wireless communication device 234 may be in communication with base station 218; and wireless communication device 236 may be in communication with mobile base station 220.
  • each base station 210, 212, 214, 218, and 220 may be configured to provide an access point to a core network (not shown) for all the wireless communication devices in the respective cells.
  • the mobile base station 220 e.g., the quadcopter
  • the mobile base station 220 may be configured to function as a wireless communication device.
  • the mobile base station 220 may operate within cell 202 by communicating with base station 210.
  • Wireless communication between a RAN 200 and a wireless communication device may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e.g., base station 210) to one or more wireless communication devices (e.g., wireless communication device 222 and 224) may be referred to as downlink (DL) transmission.
  • DL downlink
  • the term downlink may refer to a point-to-multipoint transmission originating at a scheduling entity (described further below; e.g., base station 210) .
  • Another way to describe this scheme may be to use the term broadcast channel multiplexing.
  • Uplink Transmissions from a wireless communication device (e.g., wireless communication device 222) to a base station (e.g., base station 210) may be referred to as uplink (UL) transmissions.
  • UL uplink
  • the term uplink may refer to a point-to-point transmission originating at a scheduled entity (described further below; e.g., wireless communication device 222) .
  • DL transmissions may include unicast or broadcast transmissions of control information and/or traffic information (e.g., user data traffic) from a base station (e.g., base station 210) to one or more wireless communication devices (e.g., wireless communication devices 222 and 224)
  • UL transmissions may include transmissions of control information and/or traffic information originating at a wireless communication device (e.g., wireless communication device 222)
  • the uplink and/or downlink control information and/or traffic information may be time-divided into frames, subframes, slots, and/or symbols.
  • a symbol may refer to a unit of time that, in an orthogonal frequency division multiplexed (OFDM) waveform, carries one resource element (RE) per sub-carrier.
  • a slot may carry 7, 12, or 14 OFDM symbols.
  • a subframe may refer to a duration of 1 ms. Multiple subframes or slots may be grouped together to form a single frame or radio frame.
  • OFDM orthogonal frequency division multiplexed
  • a symbol may refer to a unit of time that, in an orthogonal frequency division multiplexed (OFDM) waveform, carries one resource element (RE) per sub-carrier.
  • a slot may carry 7, 12, or 14 OFDM symbols.
  • a subframe may refer to a duration of 1 ms. Multiple subframes or slots may be grouped together to form a single frame or radio frame.
  • these definitions are not required, and any suitable scheme for organizing waveforms may be utilized, and various time divisions of the waveform may have any suitable duration.
  • the air interface in the RAN 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of the various devices.
  • 5G NR specifications provide multiple access for UL or reverses link transmissions from wireless communication devices 222 and 224 to base station 210, and for multiplexing DL of forward link transmissions from base station 210 to one or more wireless communication devices 222 and 224, utilizing orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) .
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • 5G NR specifications provide support for discrete Fourier transform-spread-OFDM (DFT-s-OFDM) with a CP (also referred to as single-carrier FDMA (SC-FDMA) ) .
  • DFT-s-OFDM discrete Fourier transform-spread-OFDM
  • SC-FDMA single-carrier FDMA
  • multiplexing and multiple access are not limited to the above schemes, and may be provided utilizing time division multiple access (TDMA) , code division multiple access (CDMA) , frequency division multiple access (FDMA) , sparse code multiple access (SCMA) , resource spread multiple access (RSMA) , or other suitable multiple access schemes.
  • multiplexing DL transmissions from the base station 210 to wireless communication devices 222 and 224 may be provided utilizing time division multiplexing (TDM) , code division multiplexing (CDM) , frequency division multiplexing (FDM) , orthogonal frequency division multiplexing (OFDM) , sparse code multiplexing (SCM) , or other suitable multiplexing schemes.
  • the air interface in the RAN 200 may utilize one or more duplexing algorithms.
  • Duplex refers to a point-to-point communication link where both endpoints can communicate with one another in both directions.
  • Full duplex means both endpoints can simultaneously communicate with one another.
  • Half duplex means only one endpoint can send information to the other at a time.
  • a full duplex channel generally relies on physical isolation of a transmitter and receiver, and suitable interference cancellation technologies.
  • Full duplex emulation is frequently implemented for wireless links by utilizing frequency division duplex (FDD) or time division duplex (TDD) .
  • FDD frequency division duplex
  • TDD time division duplex
  • transmissions in different directions operate at different carrier frequencies.
  • TDD transmissions in different directions on a given channel are separated from one another using time division multiplexing. That is, at some times the channel is dedicated for transmissions in one direction, while at other times the channel is dedicated for transmissions in the other direction, where the direction may change very rapidly, e.g., several times
  • a wireless communication device In the RAN 200, the ability for a wireless communication device to communicate while moving, independent of their location, is referred to as mobility.
  • the various physical channels between the wireless communication device and the RAN are generally set up, maintained, and released under the control of an access and mobility management function (AMF) , which may include a security context management function (SCMF) that manages the security context for both the control plane and the user plane functionality and a security anchor function (SEAF) that performs authentication.
  • AMF access and mobility management function
  • SCMF security context management function
  • SEAF security anchor function
  • a RAN 200 may utilize DL-based mobility or UL-based mobility to enable mobility and handovers (i.e., the transfer of a wireless communication device’s connection from one radio channel to another) .
  • a wireless communication device may monitor various parameters of the signal from its serving cell as well as various parameters of neighboring cells. Depending on the quality of these parameters, the wireless communication device may maintain communication with one or more of the neighboring cells. During this time, if the wireless communication device moves from one cell to another, or if signal quality from a neighboring cell exceeds that from the serving cell for a given amount of time, the wireless communication device may undertake a handoff or handover from the serving cell to the neighboring (target) cell. For example, wireless communication device 224 may move from the geographic area corresponding to its serving cell, cell 202, to the geographic area corresponding to a neighbor cell, cell 206.
  • the wireless communication device 224 may transmit a reporting message to its serving base station, base station 210, indicating this condition. In response, the wireless communication device 224 may receive a handover command, and the wireless communication device 224 may undergo a handover to the cell 206.
  • UL reference signals from each wireless communication device may be utilized by the network to select a serving cell for each wireless communication device.
  • the base stations 210, 212, and 214/216 may broadcast unified synchronization signals (e.g., unified Primary Synchronization Signals (PSSs) , unified Secondary Synchronization Signals (SSSs) and unified Physical Broadcast Channels (PBCH) ) .
  • PSSs Primary Synchronization Signals
  • SSSs unified Secondary Synchronization Signals
  • PBCH Physical Broadcast Channels
  • the wireless communication device 222, 224, 226, 228, 230, and 232 may receive the unified synchronization signals, derive the carrier frequency and slot timing from the synchronization signals, and in response to deriving timing, transmit an uplink pilot or reference signal.
  • the uplink pilot signal transmitted by a wireless communication device may be concurrently received by two or more cells (e.g., base stations 210 and 214/216) within the RAN 200.
  • Each of the cells may measure a strength of the pilot signal, and the radio access network (e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network) may determine a serving cell for the wireless communication device 224.
  • the radio access network e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network
  • the RAN 200 may continue to monitor the uplink pilot signal transmitted by the wireless communication device 224.
  • the RAN 200 may handover the wireless communication device 224 from the serving cell to the neighboring cell, with or without informing the wireless communication device 224.
  • the synchronization signal transmitted by the base stations 210, 212, and 214/216 may be unified, the synchronization signal may not identify a particular cell, but rather may identify a zone of multiple cells operating on the same frequency and/or with the same timing.
  • the use of zones in 5G networks or other next generation communication networks enables the uplink-based mobility framework and improves the efficiency of both the wireless communication device and the network, since the number of mobility messages that need to be exchanged between the wireless communication device and the network may be reduced.
  • the air interface in the RAN 200 may utilize licensed spectrum, unlicensed spectrum, or shared spectrum.
  • Licensed spectrum provides for exclusive use of a portion of the spectrum, generally by virtue of a mobile network operator purchasing a license from a government regulatory body.
  • Unlicensed spectrum provides for shared use of a portion of the spectrum without need for a government-granted license. Operation by the RAN 200 or any wireless communication device in the unlicensed spectrum may be specified according to NR-U specifications or the like While compliance with some technical rules is generally still required to access unlicensed spectrum, generally, any operator or device may gain access.
  • Shared spectrum may fall between licensed and unlicensed spectrum, wherein technical rules or limitations may be required to access the spectrum, but the spectrum may still be shared by multiple operators and/or multiple RATs.
  • the holder of a license for a portion of licensed spectrum may provide licensed shared access (LSA) to share that spectrum with other parties, e.g., with suitable licensee-determined conditions to gain access.
  • LSA licensed shared access
  • a scheduling entity e.g., a base station
  • resources e.g., time–frequency resources
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communication, wireless communication devices or scheduled entities utilize resources allocated by the scheduling entity. However, when configured for sidelink communications, wireless communication devices or scheduled entities nay utilize resources allocated by themselves or another scheduled entity.
  • Base stations are not the only entities that may function as a scheduling entity. That is, in some examples, a wireless communication device may function as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other wireless communication devices) .
  • wireless communication device 238 is illustrated communicating with wireless communication devices 240 and 242. In some examples, the wireless communication device 238 is functioning as a scheduling entity, while the wireless communication devices 240 and 242 may function as scheduled entities. In other examples, sidelink or other type of direct link signals may be communicated directly between wireless communication devices without necessarily relying on scheduling or control information from another entity.
  • two or more wireless communication devices may communicate with each other using direct link signals 227 (e.g., sidelink, Bluetooth, and/or other types of direct link signals) without relaying that communication through a base station (e.g., base station 212) .
  • wireless communication devices 238, 240, and 242 may communicate over a direct link in a device-to-device (D2D) , peer-to-peer (P2P) , vehicle-to-vehicle (V2V) network, vehicle-to-everything (V2X) , and/or in a mesh network.
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • V2X vehicle-to-everything
  • wireless communication devices 240 and 242 may optionally communicate directly with one another in addition to communicating with a scheduling entity (e.g., wireless communication device 238) .
  • wireless communication device 238 may be a transmitting sidelink device that reserves resources on a sidelink carrier for the transmission of sidelink signals to wireless communication devices 240 and 242 in a D2D or V2X network.
  • wireless communication devices 240 and 242 are each receiving sidelink devices.
  • wireless communication devices 240 and 242 may, in turn, reserve additional resources on the sidelink carrier for subsequent sidelink transmissions.
  • wireless communication devices 238, 240, and 242 may be P2P devices (e.g., Bluetooth, Zigbee, or Near Field Communication (NFC) devices) communicating over a P2P carrier.
  • P2P devices e.g., Bluetooth, Zigbee, or Near Field Communication (NFC) devices
  • wireless communication devices 238, 240, and 242 may be Bluetooth devices that communicate over a short-wavelength (e.g., 2.45 GHz) carrier.
  • Each Bluetooth device e.g., wireless communication devices 238, 240, and 242 may operate at low power (e.g., 100 mW or less) to communicate over a short-range distance (e.g., 10 meters or less) .
  • the wireless communication devices 238, 240, and 242 may form an ad-hoc piconet and each pair of wireless communication devices (e.g., wireless communication devices 238 and 240; wireless communication devices 238 and 242; and wireless communication devices 240 and 242) may communicate over a different frequency in a frequency-hopping manner.
  • one of the wireless communication devices e.g., wireless communication device 238) may function as the master, while the other wireless communication devices (e.g., wireless communication devices 240 and 242) function as slaves.
  • Each of the wireless communication devices 238, 240, and 242 may automatically detect and connect to one another.
  • two or more wireless communication devices within the coverage area of a serving base, such as base station 212, may communicate with both the base station 212 using cellular signals and with each other using direct link signals 227 (e.g., sidelink, Bluetooth, and/or other types of direct link signals) without relaying that communication through the base station 212.
  • direct link signals 227 e.g., sidelink, Bluetooth, and/or other types of direct link signals
  • the base station 212 and/or one or both of the wireless communication devices 226 and 228 may function as scheduling entities to schedule sidelink communication between wireless communication devices 226 and 228.
  • V2X networks Two primary technologies that may be used by V2X networks include dedicated short-range communication (DSRC) based on IEEE 802.11p standards and cellular V2X based on LTE and/or 5G (New Radio) standards.
  • DSRC dedicated short-range communication
  • cellular V2X based on LTE and/or 5G (New Radio) standards.
  • NR New Radio
  • V2X networks referred to herein as V2X networks, for simplicity.
  • NR New Radio
  • the concepts disclosed herein may not be limited to a particular V2X standard or may be directed to direct link (e.g., sidelink) networks other than V2X networks.
  • FIG. 3 illustrates an example of a wireless communication network 300 configured to support device-to-device (D2D) (e.g., sidelink) communication according to some aspects.
  • sidelink communication may include V2X communication.
  • V2X communication involves the wireless exchange of information directly between not only vehicles (e.g., vehicles 302 and 304) themselves, but also directly between vehicles 302/304 and infrastructure 306, such as streetlights, buildings, traffic cameras, tollbooths or other stationary objects, vehicles 302/304 and mobile devices of pedestrians/cyclists 308, and vehicles 302/304 and wireless communication networks (e.g., base station 310) .
  • V2X communication may be implemented in accordance with the New Radio (NR) cellular V2X standard defined by 3GPP, Release 15, or other suitable standard such as NR-U.
  • NR New Radio
  • a V2X transmissions may include, for example, unicast transmissions, groupcast transmissions, and broadcast transmissions.
  • Unicast describes a transmission, for example, from a vehicle (e.g., vehicle 302) to one other vehicle (e.g., vehicle 304) .
  • Groupcast arises when a group of wireless communication devices (e.g., vehicles 302 and 304) form a cluster. Data may be groupcasted within the cluster.
  • Broadcast describes a transmission from, for example, a wireless communication device (e.g., vehicle 302) to surrounding receivers (e.g., vehicle 304, infrastructure 306 (e.g., an RSU) , mobile devices of pedestrians/cyclists 308, the base station 310 of a network, or any combination thereof) in proximity to the transmitting wireless communication device.
  • a wireless communication device e.g., vehicle 302
  • surrounding receivers e.g., vehicle 304, infrastructure 306 (e.g., an RSU)
  • mobile devices of pedestrians/cyclists 308 the base station 310 of a network, or any combination thereof
  • V2X communication enable vehicles 302 and 304 to obtain information related to the weather, nearby accidents, road conditions, activities of nearby vehicles and pedestrians, objects nearby the vehicle, and other pertinent information that may be utilized to improve the vehicle driving experience and increase vehicle safety.
  • V2X data may enable autonomous driving and improve road safety and traffic efficiency.
  • the exchanged V2X data may be utilized by a V2X connected vehicle 302 and 304 to provide in-vehicle collision warnings, road hazard warnings, approaching emergency vehicle warnings, pre-/post-crash warnings and information, emergency brake warnings, traffic jam ahead warnings, lane change warnings, intelligent navigation services, and other similar information.
  • V2X data received by a V2X connected mobile device of a pedestrian/cyclist 308 may be utilized to trigger a warning sound, vibration, flashing light, etc., in case of imminent danger.
  • the sidelink communication between vehicles 302 and 304 or between a vehicle 302 or 304 and either infrastructure 306 or a pedestrian/cyclist 308 occurs over a proximity service (ProSe) PC5 interface 312.
  • the PC5 interface 312 or other direct interface may further be utilized to support D2D communication in other proximity use cases. Examples of other proximity use cases may include public safety or commercial (e.g., entertainment, education, office, medical, and/or interactive) based proximity services.
  • the term proximity service (ProSe) communication refers to the direct (e.g., D2D) communication between wireless communication devices in proximity use cases other than V2X. In the example shown in FIG.
  • direct (e.g., ProSe) communication may occur between wireless communication devices 314 and 316.
  • Direct (e.g., ProSe) communication may occur between wireless communication devices 314 and 316 utilizing unlicensed spectrum, according to, for example, NR-U standards.
  • ProSe communication may support different operational scenarios, such as in-coverage, out-of-coverage, and partial coverage.
  • Out-of-coverage refers to a scenario in which wireless communication devices 314 and 316 are outside of the coverage area of a base station (e.g., base station 310) , but each are still configured for ProSe communication.
  • Partial coverage refers to a scenario in which one of the wireless communication devices (e.g., wireless communication device 316) is outside of the coverage area of a base station (e.g., base station 310) , while the other wireless communication device (e.g., wireless communication device 314) is in communication with the base station 310.
  • In-coverage refers to a scenario in which wireless communication devices 314 and 316 are in communication with the base station 310 (e.g., gNB) via a Uu (e.g., cellular interface) connection to receive ProSe service authorization and provisioning information to support ProSe operations.
  • the base station 310 e.g., gNB
  • Uu e.g., cellular interface
  • FIG. 4 an expanded view of an exemplary subframe 402 is illustrated, showing an OFDM resource grid.
  • time is in the horizontal direction with units of OFDM symbols; and frequency is in the vertical direction with units of subcarriers of the carrier.
  • the resource grid 404 may be used to schematically represent time–frequency resources for an uplink transmission, a downlink transmission and a given antenna port. That is, in a multiple-input-multiple-output (MIMO) implementation with multiple antenna ports available, a corresponding multiple number of resource grids 404 may be available for communication.
  • the resource grid 404 is divided into multiple resource elements (REs) 406.
  • An RE which is 1 subcarrier ⁇ 1 symbol, is the smallest discrete part of the time–frequency grid, and contains a single complex value representing data from a physical channel or signal.
  • each RE may represent one or more bits of information.
  • a block of REs may be referred to as a physical resource block (PRB) or more simply a resource block (RB) 408, which contains any suitable number of continuous subcarriers in the frequency domain.
  • an RB may include 12 subcarriers, a number independent of the numerology used.
  • an RB may include any suitable number of consecutive or continuous OFDM symbols in the time domain.
  • Scheduling of wireless communication devices or sidelink devices typically involves scheduling one or more resource elements 406 within one or more sub-bands.
  • a wireless communication device generally utilizes only a subset of the resource grid 404.
  • an RB may be the smallest unit of resources that can be allocated to a wireless communication device.
  • the RBs may be scheduled by a base station (e.g., gNB, eNB, etc. ) or may be self-scheduled by a wireless communication device/sidelink device implementing D2D sidelink communication.
  • the RB 408 is shown as occupying less than the entire bandwidth of the subframe 402, with some subcarriers illustrated above and below the RB 408.
  • the subframe 402 may have a bandwidth corresponding to any number of one or more RBs 408.
  • the RB 408 is shown as occupying less than the entire duration of the subframe 402, although this is merely one possible example.
  • a frame may refer to a duration of 10 ms, with each frame sub-divided into 10 subframes 402 of 1 ms each.
  • Each 1 ms subframe may consist of one or multiple adjacent slots.
  • subframe 402 includes four slots 410, as an illustrative example.
  • a slot may be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a slot may include 7 or 14 OFDM symbols with a nominal CP.A slot may include 12 OFDM symbols with an extended CP.
  • CP cyclic prefix
  • Additional examples may include mini-slots, sometimes referred to as shortened transmission time intervals (TTIs) , having a shorter duration (e.g., 1, 2, or 3 OFDM symbols) .
  • TTIs transmission time intervals
  • These mini-slots, or shortened TTIs, may in some cases be transmitted occupying resources scheduled for ongoing slot transmissions for the same or for different wireless communication devices. Any number of resource blocks may be utilized within a subframe or slot.
  • An expanded view of one of the slots 410 illustrates the slot as including a control region 412 and a data region 414.
  • the control region 412 may carry control channels (e.g., PDCCH, PSCCH)
  • the data region 414 may carry data channels (e.g., PDSCH or PUSCH or PSSCH) .
  • a slot may contain all DL, all UL, or at least one DL portion and at least one UL portion.
  • the simple structure illustrated in FIG. 4 is merely exemplary in nature, and different slot structures may be utilized, and may include one or more of each of the control region (s) and data region (s) .
  • the various REs 406 within an RB 408 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc.
  • Other REs 406 within the RB 408 may also carry pilots or reference signals, including but not limited to a demodulation reference signal (DMRS) a control reference signal (CRS) , or a sounding reference signal (SRS) .
  • DMRS demodulation reference signal
  • CRS control reference signal
  • SRS sounding reference signal
  • pilots or reference signals may provide for a receiving device to perform channel estimation of the corresponding channel, which may enable coherent demodulation/detection of the control and/or data channels within the RB 408.
  • the slot 410 may be utilized for broadcast or unicast communication.
  • a broadcast, multicast, or groupcast communication may refer to a point-to-multipoint transmission by one device (e.g., a base station, wireless communication device, or other similar device) to other devices.
  • a broadcast communication is delivered to all devices, whereas a multicast communication is delivered to multiple intended recipient devices.
  • a unicast communication may refer to a point-to-point transmission by a one device to a single other device.
  • the scheduling entity may allocate one or more REs 406 (e.g., within the control region 412) to carry DL control information including one or more DL control channels, such as a PBCH; a PSS; a SSS; a physical control format indicator channel (PCFICH) ; a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) ; and/or a physical downlink control channel (PDCCH) , etc., to one or more scheduled entities (e.g., wireless communication devices) .
  • the PCFICH provides information to assist a receiving device in receiving and decoding the PDCCH.
  • the PDCCH carries downlink control information (DCI) including but not limited to power control commands (e.g., one or more open loop power control parameters and/or one or more closed loop power control parameters) , scheduling information, a grant, and/or an assignment of REs for DL and UL transmissions.
  • DCI downlink control information
  • the PHICH carries HARQ feedback transmissions such as an acknowledgment (ACK) or negative acknowledgment (NACK) .
  • HARQ is a technique well-known to those of ordinary skill in the art, wherein the integrity of packet transmissions may be checked at the receiving side for accuracy, e.g., utilizing any suitable integrity checking mechanism, such as a checksum or a cyclic redundancy check (CRC) .
  • CRC cyclic redundancy check
  • an ACK may be transmitted, whereas if not confirmed, a NACK may be transmitted.
  • the transmitting device may send a HARQ retransmission, which may implement chase combining, incremental redundancy, etc.
  • the scheduled entity may utilize one or more REs 406 to carry UL control information (UCI) including one or more UL control channels, such as a physical uplink control channel (PUCCH) , to the scheduling entity.
  • UCI may include a variety of packet types and categories, including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions.
  • the UCI may include a scheduling request (SR) , i.e., request for the scheduling entity to schedule uplink transmissions.
  • SR scheduling request
  • the scheduling entity may transmit downlink control information (DCI) that may schedule resources for uplink packet transmissions.
  • DCI downlink control information
  • UCI may also include HARQ feedback, channel state feedback (CSF) , or any other suitable UCI.
  • one or more REs 406 may be allocated for user data traffic. Such traffic may be carried on one or more traffic channels, such as, for a DL transmission, a physical downlink shared channel (PDSCH) ; or for an UL transmission, a physical uplink shared channel (PUSCH) , or for sidelink communication a physical sidelink shared channel (PSSCH) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • PSSCH physical sidelink shared channel
  • one or more REs 406 within the data region 414 may be configured to carry system information blocks (SIBs) , carrying information that may enable access to a given cell.
  • SIBs system information blocks
  • the control region 412 of the slot 410 may include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiating (transmitting) sidelink device (e.g., V2X or other sidelink device) towards a set of one or more other receiving sidelink devices.
  • PSCCH may include HARQ feedback information (e.g., ACK/NACK) that may be used to indicate a need, or lack of need, for retransmissions on the sidelink.
  • the data region 414 of the slot 410 may include a physical sidelink shared channel (PSSCH) including the data transmitted by the initiating (transmitting) sidelink device within resources reserved over the sidelink carrier by a scheduling device or the transmitting sidelink device.
  • PSSCH physical sidelink shared channel
  • Transport channels carry blocks of information called transport blocks (TB) .
  • TBS transport block size
  • MCS modulation and coding scheme
  • channels or carriers described above and illustrated in FIGs. 1 and 4 are not necessarily all the channels or carriers that may be utilized between a scheduling entity 108 and scheduled entities (e.g., one of more wireless communication devices 106, 122) , and those of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those illustrated, such as other traffic, control, and feedback channels.
  • a network access node e.g., gNB
  • gNB network access node
  • Mode 2 the wireless communication devices may autonomously select sidelink resources for its own use. Signaling on the sidelink is the same between the two modes.
  • Mode 3 and Mode 4 are generally directed to V2X, with Mode 4 being directed to self-scheduling of resources. Although Modes 3 and 4 are directed to V2X, the disclosures made herein may have applicability to at least Mode 2 and Mode 4. From a receiver’s point of view, there is no difference between the four modes.
  • the network access node may provide resources in at least two ways.
  • a first way may include having the network access node provide resources dynamically (e.g., a dynamic grant) to wireless communication devices, in response to requests for sidelink resources from wireless communication devices.
  • the network access node may activate preconfigured sidelink grants for sidelink communication among wireless communication devices.
  • sidelink feedback may be reported back to the network access node by a transmitting wireless communication device.
  • a wireless communication device may schedule sidelink communication (e.g., PC5) by use of a sidelink control information (SCI) message.
  • SCI may be produced in two stages.
  • the first stage of sidelink control information may be referred to as SCI-1 herein.
  • the second stage of sidelink control information may be referred to as SCI-2 herein.
  • SCI-1 may be transmitted on a physical sidelink control channel (PSCCH) .
  • SCI-1 may include information for resource allocation of a sidelink resource and for decoding of the second stage of sidelink control information (i.e., SCI-2) .
  • SCI-1 may identify a priority level of a payload. For example, ultra-reliable-low-latency communication (URLLC) traffic has a higher priority than text message traffic (e.g., short message service (SMS) traffic) .
  • SCI-1 may also include a physical sidelink shared channel (PSSCH) resource assignment and a resource reservation period (if enabled) .
  • PSSCH physical sidelink shared channel
  • SCI-1 may include a PSSCH demodulation reference signal (DMRS) pattern (if more than one pattern is configured) .
  • DMRS PSSCH demodulation reference signal
  • the DMRS may be used by a receiver for radio channel estimation for demodulation of the associated physical channel.
  • SCI-1 may also include information about the SCI-2 message, for example, SCI-1 may disclose the size of SCI-2 by indicating an amount of time-frequency resources that are allotted for SCI-2, a number of a PSSCH DMRS port (s) , and a modulation and coding scheme (MCS) index.
  • SCI-1 may include other information that is useful for establishing and decoding a PSSCH resource.
  • SCI-2 may also be transmitted on the PSCCH and may contain information for decoding the PSSCH.
  • SCI-2 includes a 16-bit layer 1 (L1) destination identifier (ID) , an 8-bit L1 source ID, a hybrid automatic repeat request (HARQ) process ID, a new data indicator (NDI) , and a redundancy version (RV) .
  • SCI-2 may include other information that is useful for establishing and decoding a PSSCH resource.
  • NR-U sidelink communications may make use of orthogonal frequency division multiplexing (OFDM) .
  • OFDM orthogonal frequency division multiplexing
  • One aspect of NR-U communications is that of utilization of multiple OFDM numerologies.
  • Each OFDM numerology may be identified by the Greek letter ⁇ .
  • One distinction between the numerologies is that of sub-carrier spacing.
  • Each numerology has a different subcarrier spacing (SCS) .
  • SCS subcarrier spacing
  • FIG. 5 depicts two OFDM grid portions.
  • a first numerology e.g., numerology 0
  • the first numerology has a SCS of 15 kHz.
  • the next numerology e.g., numerology 1
  • the second numerology has an SCS of 30 kHz.
  • the number of symbols in the first OFDM grid 502 and the second OFDM grid 504 remain at 14 symbols each; however, due to the scaled numerology, as between the first OFDM grid 502 and the second OFDM grid 504 the symbol duration is halved and the SCS is doubled.
  • a physical resource block (PRB) interlaced waveform is introduced for the uplink (UL) to satisfy an occupied channel bandwidth (OCB) requirement and to boost UL transmit power given a standards imposed power spectral density (PSD) limitation.
  • Power spectral density is a positive real function describing how the power of a signal is distributed with frequency. It provides the amount of energy per unit of frequency (dBm/Hz) and can be computed as the Fourier transform of an autocorrelation process.
  • FIG. 6A is an example of a plurality of OFDM symbols arranged in and OFDM time-frequency resource grid (referred to herein as an OFDM resource grid 602) . Downlink and uplink transmissions may be organized in such a grid. Similar to the illustration of FIG. 4, FIG. 6 depicts two subframes 604 of one frame (not shown) . Each frame (not shown) may have a 10 ms duration. Each frame may be divided into 10 subframes 604, each subframe 604 may thus have a 1 ms duration. Each subframe may be divided into slots 606. In the example of FIG. 6, each subframe 604 is divided into two slots 606 (in contrast, each subframe 402 of FIG. 5 was divided into four slots 404) . The number of slots may change depending on the numerology used.
  • the OFDM grid is subdivided into resource blocks.
  • the resource block may be referred to as common resource blocks.
  • a first common resource block (CRB 0 612) has an index of 0.
  • Each resource block includes 12 resource elements (REs) .
  • Each RE is one subcarrier in the frequency domain and one OFDM symbol in the time domain.
  • REs of the first seven resource blocks, RB 0 612 -RB 6 624, are illustrated with emphasis, compared to the remaining resource blocks in the slot 606.
  • the shading of alternate resource blocks in FIG. 6 is provided as an aid for viewing and has no bearing on the content that may be carried by any resource block.
  • Point A represents the center frequency of a lowest subchannel in the frequency domain. Point A is used as common reference point for other resource blocks.
  • FIGs. 6B and 6C are representations of the same plurality of common resource blocks, where each square in FIGs. 6B and 6C represents 12 subcarriers by one OFDM symbol.
  • CRB 1 614 of FIG. 6A corresponds to CRB 1 626 of FIGs. 6B and 6C.
  • NR-U may use interlaced resource blocks for sidelink communication.
  • the number of interlaces may be set for each numerology, ⁇ .
  • the set of interlaces consists of interlace 0, interlace 1, interlace 2, interlace 3, and interlace 4.
  • the set of interlaces consist of interlace 0, interlace 1, interlace 2, interlace 3, interlace 4, interlace 5, interlace 6, interlace 7, interlace 8, and interlace 9.
  • the resource blocks may be referred to as being “interlaced” because the interlace index number associated with the resource block repeats, over and over again, from the first common resource block CRB 0 612, through to a last common resource block (not shown) .
  • Interlace index numbers wrap around; in other words, interlace 4 and interlace 0 (i.e., ⁇ 4, 0 ⁇ ) may be considered as continuous when there are 5 interlaces as shown in FIG. 6B.
  • Interlace 9 and interlace 0 i.e., ⁇ 9, 0 ⁇
  • interlacing of sets of interlaces is highlighted in FIG. 6B by use of upwardly-left-biased hatching in every fifth common resource block, CRB 0, CRB 5, CRB 10, ...CRB k, CRB k+5, CRB k+10, CRB k+15, ....
  • These highlighted resource blocks emphasize the repetition of interlace 0 at every fifth resource block.
  • interlace 1 follows interlace 0 and also repeats every fifth resource block, and so on, throughout the set of interlaces and resource blocks.
  • interlace 1 follows interlace 0 and repeats every tenth resource block, and so on, throughout the set of interlaces and resource blocks.
  • a set of interlaces may span an entire channel bandwidth,
  • the set of interlaces may span an entire 20 MHz channel bandwidth of an NR-U channel having 30 kHz SCS.
  • a certain PRB-based interlace design is supported for physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) .
  • the same interlace design may be used for physical sidelink shared channel (PSSCH) and physical sidelink control channel (PSCCH) .
  • the PRB-interlace design provides for the same spacing between consecutive PRBs in an interlace set, for all interlaces, regardless of carrier bandwidth. In some examples, the number of PRBs per interlace is dependent on the carrier bandwidth.
  • the PRB-interlace design may further provide for a frequency, identified as “Point A” to be used as a reference point for an interlace definition. For example, a starting PRB may be identified as an offset between Point A and the lowest frequency subcarrier of a first interlaced PRB.
  • the PRB-interlace design also specifies that, for all bandwidths, the number of interlaces, K, is equal to 10 interlaces for 15 kHz SCS and is equal to 5 interlaces for 30 kHz SCS.
  • the following PRB-based interlace design is supported for 20 MHz carrier bandwidth:
  • N 10 or 11 PRBs /interlace
  • N 10 or 11 PRBs /interlace
  • NR-U allocated resources are indicated by a combination of interlace and resource block sets (RB-sets) .
  • one RB-set corresponds to one listen before talk (LBT) subband (normally 200 MHz) .
  • LBT listen before talk
  • RB-sets are allocated in a continuous manner.
  • Interlaces are allocated in either a continuous manner or a discontinuous manner.
  • PRB-based interlace design Similar to 5G NR, NR-U supports the following PRB-based interlace design:
  • N 10 or 11 PRBs /interlace
  • N 10 or 11 PRBs /interlace
  • resource allocation in the frequency domain for sidelink is in units of subchannels and is continuous.
  • the subchannels may be configured, or grouped together, as bandwidth units.
  • a frequency resource may be indicated by specifying a combination of a starting subchannel index and a number of subchannels.
  • a frequency resource is indicated by specifying a combination of interlaces and RB-sets.
  • resource collisions may be avoided when a network access node (e.g., a gNB) handles scheduling,
  • a network access node e.g., a gNB
  • partial collisions are possible when multiple wireless communication devices use overlapping interlace and RB-sets.
  • the partial collisions may be eliminated by allocating frequency resources in an interlace/RB-set frequency domain.
  • Allocations may be indicated as elements of a two-dimensional array that includes rows of RB-set index numbers and columns of interlace index numbers. It is noted that both the rows and the columns of the just-described two-dimensional array are in the frequency domain. In other words, the time domain may not be considered when allocating frequency domain resources according to aspects described herein.
  • a wrap around in interlace index numbers may be treated as a continuous allocation of resource block sets.
  • RB-set 4 and RB-set 0 i.e., ⁇ 4, 0 ⁇ .
  • the two-dimensional array may be a rectangular array.
  • the number of rows of RB-set index numbers would not be equal to the number of columns of interlace index numbers.
  • the number of columns of interlace index numbers may be greater than the number of rows of RB-set index numbers.
  • the number of rows of RB-set index numbers may be greater than the number of columns of interlace index numbers.
  • the number of rows of RB-set index numbers may be equal to the number of columns of interlace index numbers.
  • Columns and rows may be interchanged; that is, interlace index numbers may populate the rows of two-dimensional array and RB-set index numbers may populate the columns of the two-dimensional array.
  • FIG. 7A is an illustration of an OFDM resource grid 702.
  • FIG. 7B is an illustration of a series of common resource blocks 704 (referred to herein as CRBs) of the OFDM resource grid 702.
  • FIG. 7C is an illustration of a series of physical resource blocks 706 (referred to herein as PRBs) , grouped into a plurality of resource block sets (referred to herein as RB-sets 708) separated by a guard band 710 of PRBs, which are all mapped to the series of common resource blocks 704.
  • FIG. 7D is a two-dimensional array referred to herein as an interlace/RB-set array 712.
  • the OFDM resource grid 702 may be similar to the OFDM resource grid 602 of FIG. 6; accordingly, a detailed description is omitted to avoid repetition.
  • the OFDM resource grid 702 illustrates a representative series of common resource blocks, CRB 0 712, CRB 1 714, CRB 5k 718, CRB 5k+1 720, and CRB 5k+2 722, etc. It is understood that the variable k holds a predetermined value representative of a quantity “k” of resource blocks.
  • k 100
  • a first continuous series of resource blocks would run from CRB 0 -CRB 99
  • a second continuous series of resource blocks would run from CRB k -CRB k+99 (i.e., CRB 100 -CRB 199)
  • the fifth continuous series of resource blocks would run from CRB 5k (i.e., CRB 500) -CRB 5k+99 (e.g., CRB 599)
  • CRB 199 is continuous with CRB 200 (i.e., CRB 2k) , and so on.
  • FIG. 7B is an illustration of a series of common resource blocks 704 of the OFDM resource grid 702.
  • the number of interlaces is 5, therefore the interlace index K runs from 0-4 and repeats over and over again.
  • the CRB index of each CRB is shown to the left of each CRB in FIG. 7B.
  • the interlace index is shown to the right of each CRB.
  • CRB 1 714 of FIG. 7A maps to (and is the same as) CRB 1 714 of FIG. 7B;
  • CRB 5k 718 of FIG. 7A maps to (and is the same as) CRB 5k 718 of FIG. 7B;
  • CRB 5k+1, 720 of FIG. 7A maps to (and is the same as) CRB 5k+1 720 of FIG. 7B;
  • CRB 5k+2 722 of FIG. 7A maps to (and is the same as) CRB 5k+2 722 of FIG. 7B; and so on.
  • interlace 0 712 is emphasized to highlight its repetition of every five interlaces (e.g., at CRB 0 712, CRB 5 722, ..., CRB 5k 718, CRB 5k+5 719, and so on) .
  • FIG. 7C is an illustration of a series of physical resource blocks 706, grouped into a plurality of resource block sets (referred to herein as RB-sets 708) separated by a guard band 710 of PRBs.
  • the subcarrier of the lowest PRB, PRB 0 738, is defined as the lowest frequency PRB and may be located by a given offset 730, in frequency, from Point A.
  • Other ways to locate the lowest PRB, or any one or more PRB in resource block set (s) and guard band (s) are within the scope of the disclosure
  • the RB-sets 708 are depicted as RB-set 0 744 and RB-set 1 746.
  • RB-set 0 is continuous with guard band 710.
  • Guard band 710 is continuous with RB-set 1 746.
  • RB-set 0 744, guard band 710, and RB-set 1 form one continuous set of PRBs.
  • the number of PRBs is each of the RB-sets 708 may be equal.
  • a radio resource control (RRC) may set and select the members of each of the RB-sets 708.
  • the RRC may be implemented in a processing device of a wireless communication device (e.g., a scheduled entity) . In the exemplary illustration of FIG.
  • two adjacent RB-sets are assigned.
  • the RBs of an assigned interlace that falls between the two RB-sets, in the guard band between the adjacent RB-sets is also assigned.
  • RB-set 0 744 and RB-set 1 746 are assigned to interlace 0 (which begins with CRB 0 712 and repeats every fifth CRB) .
  • the PRBs of RB-set 0 744 that correspond with interlace 0 are PRB 0 738 (corresponding to CRB 718) and PRB 5 749 (corresponding to CRB 719) ; accordingly, out of RB-set 0 744, PRB 0 738 and PRB 5 749 may be allocated as frequency domain resources by a wireless communication device.
  • the PRBs of RB-set 1 746 that correspond with interlace 0 are PRB m 752 (corresponding to CRB Z 748) and PRB m+5 754 (corresponding to CRB 750) ; accordingly, out of RB-set 1 744, PRB m 752 and PRB m+5 754 may also be allocated as frequency domain resources by the wireless communication device.
  • PRBs n+1, n+2, and n+ 3 fall between RB-set 0 744 and RB-set 1 746 in the guard band 710 between the two RB-sets.
  • PRB n+1 is on the assigned interlace, interlace 0.
  • PRB n+1 752 which falls in the guard band 710 between the two RB-sets (RB-set 0 744 and RB-set 1 746) may also be allocated as a frequency domain resource by the wireless communication device.
  • the allocations are illustrated by solid black squares at each allocated CRB, and the word “Allocate” bridging between the allocated CRB and its corresponding PRB.
  • FIG. 7D is a two-dimensional array referred to herein as an interlace/RB-set array 712.
  • the interlace/RB-set array 712 graphically depicts that the allocated frequency resources are those PRBs of resource block set 0 744 and resource block set 1 746 that overlap with and correspond to interlace 0.
  • the minimum frequency domain resource assignment unit for a PSSCH may be one interlace (e.g., interlace 0 or interlace 1, or interlace 2, ...) over one RB-set (e.g., RB-set 0 744, RB-set 1 746) ; however, according to aspects described herein, the frequency domain resources assigned for one PSSCH may be presented in the form of an interlace/RB-set 2-D domain rectangle (e.g., the two-dimensional array 752 of FIG. 7D) .
  • one PSSCH can be assigned to a set of continuous interlaces (e.g., at least one of interlace 0, interlace 1, interlace 2, interlace 3, or interlace 4) over a set of continuous RB-sets (e.g., at least one of RB-set 0 744, or RB-set 1 746) .
  • the sets or continuous interlaces may be comprised of 5 interlaces or 10 interlaces (depending on the SCS) ; however, other numbers of interlaces are within the scope of this disclosure.
  • the sets of continuous RB-sets may be comprised of two RB-sets (RB-set 0 and RB-set 1) . However, other numbers of RB-sets are within the scope of this disclosure.
  • FIG. 8, FIG. 9, and FIG. 10 are each exemplary representations of two-dimensional arrays, similar to two-dimensional array 752 of FIG. 7D.
  • FIG. 8 is an exemplary representation of a four row by five column array.
  • the rows represent RB-sets.
  • the columns represent interlaces.
  • the two-dimensional array 802 indicates that interlace 0, interlace 1, and interlace 2, in RB-set 1 may be allocated as frequency domain resources by a wireless communication device.
  • the wireless communication device may allocate one frequency domain resource, any combination of frequency domain resources, or all of the frequency domain resources.
  • FIG. 9 is an exemplary representation of another four row by five column two-dimensional array 902.
  • the rows and columns of two-dimensional array 902 are described in the same manner as those of FIG. 8 and their description will be omitted to avoid repetition.
  • the two-dimensional array 902 indicates that interlace 0 in RB-set 0, RB -set 1, and RB-set 2 resource block set 1, and resource block set 2 may be allocated as frequency domain resources by a wireless communication device.
  • the wireless communication device may allocate one frequency domain resource, any combination of frequency domain resources, or all of the frequency domain resources.
  • FIG. 10 is an exemplary representation of another four row by five column two-dimensional array 1002.
  • the rows and columns of two-dimensional array 1002 are described in the same manner as those of FIG. 8 and their description will be omitted to avoid repetition.
  • the two-dimensional array 1002 indicates that interlace 1, interlace 2, and interlace 3, in RB-set 0, RB-set 1, and RB-set 2 may be allocated as frequency domain resources by a wireless communication device.
  • the wireless communication device may allocate one frequency domain resource, any combination of frequency domain resources, or all of the frequency domain resources.
  • FIG. 11A is a two-dimensional array 1102, similar to the two-dimensional array 752 of FIG. 7D.
  • the two-dimensional array 1102 depicts four rows of RB-set index numbers (0-3) and five columns of interlace index numbers (0-4) . Both the interlaces and the RB-sets are representative of frequencies in the frequency domain.
  • FIG. 11B corresponds to FIGs. 7B and 7C. Due to the similarities, a detailed description of all aspects of FIG. 11B will be omitted to avoid repetition.
  • PRB 0 may be defined as the lowest subcarrier of the resource block set (RB-set 0 1104) that has a given offset 1106 from Point A.
  • PRB 0 corresponds to CRB 5k-1 and belongs to interlace 4.
  • PRB 1 corresponds to CRB 5k and belongs to interlace 0.
  • PRB 2 corresponds to CRB 5k+1 and belongs to interlace 1.
  • PRB 3 corresponds to CRB 5k+2 and belongs to interlace 2.
  • PRB 4 corresponds to CRB 5k+3 and belongs to interlace 3.
  • PRB 5 corresponds to CRB 5k+4 and belongs to interlace 4. This pattern repeats from the first PRB (PRB 0) of the first RB-set (RB-set 0 1104) , through the guard band 1108, and through to the last PRB of the last RB-set (RB-set 1 1110) .
  • the PRBs of RB-set 0 1104 and RB-set 1 1110 that correspond (e.g., coincide or overlap) with CRBs belonging to interlace 3 identify the frequency domain resources allocated according to aspects described herein.
  • CRBs belonging to interlace 3 that are lower in frequency than the lowest PRB (PRB 0) of RB-set 0 1104 and CRBs belonging to interlace 3 that are higher in frequency than the highest PRB of RB-set 1 1110 are not allocated as frequency resources.
  • FIGs. 11A and 11B instead of allocating the resource blocks of interlace 0 that belong to RB-set 0 and RB-set 1 (as in FIGs. 7B, 7C, and 7D) , the allocation is made to the resource blocks of interlace 3 that belong to RB-set 0 and RB-set 1.
  • RB-set 0 1104 of FIG. 11B is continuous with guard band 1108.
  • Guard band 1108 is continuous with RB-set 1 1110.
  • RB-set 0 1104, guard band 1108, and RB-set 1 1110 form one continuous set of PRBs.
  • the number of PRBs in RB-set 0 1104 may be equal to the number of PRBs in RB-set 1 1110.
  • two adjacent RB-sets are assigned.
  • the RBs of an assigned interlace that falls between the two RB-sets, in the guard band between the adjacent RB-sets is also assigned.
  • the assigned interlace is interlace 3.
  • the resolution of the basic unit will be 5 PRB by one interlace for 30 kHz SCS (as exemplified in FIG. 12B, below) or 10 PRB by one interlace for 15 kHz SCS.
  • RB-sets e.g., groups of PRBs
  • interlaces are allocated in a continuous manner.
  • the actual size of the unit is 1 PRB.
  • FIG. 12A is a two-dimensional array 1202, similar to the two-dimensional arrays 752, 802, 902, 1002, and 1102 of FIGs. 7D, 8, 9, 10, and 11A, respectively.
  • groups of PRBs are defined.
  • an RB-set of 50 PRBs was divided into 10 groups of 5 PRBs each.
  • the two-dimensional array 1202 depicts ten rows of groups of 5 PRBs each. Each group of 5 PRBs is provided with an index number (0-9) .
  • the two-dimensional array 1202 also depicts five columns of interlace index numbers (0-4) , as in the previous examples. Both the interlaces and the groups of 5 PRBs are representative of frequencies in the frequency domain.
  • the two-dimensional array 1202 of FIG. 12A indicates that PRBs in the first group of 5 PRBs (Group 0 1208) and the second group of 5 PRBs (Group 1 1210) that correspond to interlace 1 and interlace 2 are to be allocated as frequency resources.
  • the allocations are illustrated by solid black squares at each allocated CRB, and the word “Allocate” bridging between the allocated CRB and its corresponding PRB.
  • the PRBs in the third group of 5 PRBs (Group 2 1212) through to and including the tenth group of 5 PRBs (Group 9 1214) , will not be allocated as frequency resources even though those Groups include PRBs in interlace 1 an interlace 2.
  • Upwardly-left-biased hatching in the squares representing CRBs that are part of interlace 1 and interlace 2 indicate that those interlaces repeat, over and over again, but those particular CRBs/PRBs corresponding to this interlaces were not allocated as frequency resources.
  • FIG. 13A is a two-dimensional array 1302, similar to the two-dimensional array 1202 of FIG. 12A.
  • FIG. 13B is similar to FIG. 12B. Due to the similarities, a detailed description of many of the aspects of FIG. 13B will be omitted to avoid repetition.
  • a difference between FIG. 12A and FIG. 13A is that the columns of interlaces 1330 are each divided into sub-interlaces in FIG. 13A. The subdivision may be used to establish that all even CRBs in an interlace form a first sub-interlace and all odd CRBs in an interlace form a second sub-interlace.
  • the two-dimensional array 1302, of FIG. 13B indicates that no PRBs corresponding to interlace index umbers 0, 3 and 4 are allocated as frequency resources. Additionally, the two-dimensional array 1302 indicates that no PRBs from the fourth through ninth groups of 5 PRBs are allocated as frequency resources.
  • the upwardly-left-biased hatching in the two-dimensional array 1302 in interlace 1 (odd) column indicates that odd numbered CRBs in interlace 1 that correspond to the first group of 5 PRBs (Group 0 1308) , the second group of 5 PRBs (Group 1 1310) , and the third group of 5 PRBs (Group 2 1312) may be allocated as frequency resources.
  • CRB 5k+1 1318 and CRB 10k+1 1326 are odd numbered CRBs in interlace 1 that correspond to the first group of 5 PRBs (Group 0 1308) and the third group of 5 PRBs (Group 2 1312) .
  • CRB 5k+6 1322 is the only CRB in interlace 1 (in the second group of 5 PRBs (Group 1 1310) ) and it has an index number that is even (5k+6) .
  • PRB 1, corresponding to CRB 5k+1 1318 and PRB 11 corresponding to CRB 5k+1 1326, both in interlace 1 may be allocated as frequency resources.
  • the allocations are illustrated by solid black squares at each allocated CRB, and the word “Allocate” bridging between the allocated CRB and its corresponding PRB. Letter “E” and “O” appear in each of the CRBs and PRBs in Group 0 1308, Group 1 1310, and Group 2, 1312 to aid in identifying even and odd numbered CRBs and PRBs.
  • the upwardly-left-biased hatching in the two-dimensional array 1302 in the interlace 2 (even) column indicates that even numbered CRBs in interlace 2 that correspond to the first group of 5 PRBs (Group 0 1308) , the second group of 5 PRBs (Group 1 1310) , and the third group of 5 PRBs (Group 2 1312) may be allocated as frequency resources.
  • CRB 5k+2 1320 and CRB 10k+2 1328 are even numbered CRBs in interlace 1 that correspond to the first group of 5 PRBs (Group 0 1308) and the third group of 5 PRBs (Group 2 1312) .
  • CRB 5k+7 1324 is the only CRB in interlace 2 (in the second group of 5 PRBs (Group 1 1310) ) and it has an index number that is odd (5k+7) .
  • PRB 2 corresponding to CRB 5k+2 1320 and PRB 12 corresponding to CRB 5k+12 1328, both in interlace 2 may be allocated as frequency resources. The allocations are illustrated by solid black squares at each allocated CRB, and the word “Allocate” bridging between the allocated CRB and its corresponding PRB
  • the asterisk (*) in the two-dimensional array 1302 indicates that even numbered CRBs in interlace 1 that correspond to the first group of 5 PRBs (Group 0 1308) , the second group of 5 PRBs (Group 1 1310) , and the third group of 5 PRBs (Group 2 1312) are not considered. Additionally, the asterisk (*) in the two-dimensional array 1302 indicates that odd numbered CRBs in interlace 2 that correspond to the first group of 5 PRBs (Group 0 1308) , the second group of 5 PRBs (Group 1 1310) , and the third group of 5 PRBs (Group 2 1312) are also not considered.
  • the even CRBs in interlace 1 may likewise form a second sub-interlace.
  • the even CRBs in interlace 2 may likewise form a second sub-interlace.
  • the analysis and description of even CRBs in view of interlace 1 and odd CRBs in view of interlace 2 are similar to those described above but would be substantially duplicative; therefore, for the sake of brevity, their descriptions are omitted.
  • the resource allocation unit in the examples of FIG. 13A and FIG. 13B is one RB-set (or group of PRBs) by one sub-interlace.
  • a wireless communication device in a wireless communication network may form a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain.
  • the wireless communication device may map each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers.
  • the wireless communication device may then allocate one or more PRBs that are members of the one or more RB-sets and that have interlace index numbers and RB-set index numbers that match the array interlace index number and the array RB-set index number, respectively, of the selected element.
  • FIG. 14 is a block diagram illustrating an example of a hardware implementation of a wireless communication device 1400 employing a processing system 1414, according to some aspects described herein.
  • the wireless communication device 1400 may be a wireless communication device, as shown and described above in reference to FIG. 1.
  • the wireless communication device 1400 may be implemented with a processing system 1414 that includes one or more processors 1404.
  • processors 1404 include microprocessors, microcontrollers, digital signal processors (DSPs) , field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • DSPs digital signal processors
  • FPGAs field programmable gate arrays
  • PLDs programmable logic devices
  • state machines gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • the wireless communication device 1400 may be configured to perform any one or more of the functions described herein. That is, the processor 1404, as utilized in the wireless communication device 1400, may be used to implement any one or more of the processes and procedures described herein.
  • the processing system 1414 may be implemented with a bus architecture, represented generally by the bus 1402.
  • the bus 1402 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 1414 and the overall design constraints.
  • the bus 1402 links together various circuits including one or more processors (represented generally by the processor 1404) , a memory 1405, and computer-readable media (represented generally by the computer-readable medium 1406) .
  • the bus 1402 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • a bus interface 1408 provides an interface between the bus 1402 and a transceiver 1410.
  • the transceiver 1410 provides a means for communicating with various other apparatus over a transmission medium (e.g., air interface) .
  • the transceiver 1410 may further be coupled to one or more antennas or array modules 1420.
  • the bus interface 1408 further provides an interface between the bus 1402 and a user interface 1412 (e.g., keypad, display, touch screen, speaker, microphone, control features, etc. ) .
  • the bus interface 1408 further provides an interface between the bus 1402 and a power source 1428, an application processor 1430, which may be separate from a wireless communication device 1400 modem or processing system 1414.
  • the processor 1404 is responsible for managing the bus 1402 and general processing, including the execution of software stored on the computer-readable medium 1406.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the software when executed by the processor 1404, causes the processing system 1414 to perform the various processes and functions described herein for any particular apparatus.
  • the computer-readable medium 1406 and the memory 1405 may also be used for storing data that is manipulated by the processor 1404 when executing software.
  • the computer-readable medium 1406 may be a non-transitory computer-readable medium.
  • a non-transitory computer-readable medium includes, by way of example, a magnetic storage device (e.g., hard disk, floppy disk, magnetic strip) , an optical disk (e.g., a compact disc (CD) or a digital versatile disc (DVD) ) , a smart card, a flash memory device (e.g., a card, a stick, or a key drive) , a random access memory (RAM) , a read only memory (ROM) , a programmable ROM (PROM) , an erasable PROM (EPROM) , an electrically erasable PROM (EEPROM) , a register, a removable disk, and any other suitable medium for storing software and/or instructions that may be accessed and read by a computer.
  • a magnetic storage device e.g., hard disk, floppy disk, magnetic strip
  • an optical disk e.g.
  • the computer-readable medium 1406 may reside in the processing system 1414, external to the processing system 1414, or distributed across multiple entities including the processing system 1414.
  • the computer-readable medium 1406 may be embodied in a computer program product.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the computer-readable medium 1406 may be part of the memory 1405.
  • the processor 1404 may include communication and processing circuitry 1441 configured to communicate with another wireless communication device using sidelink according to an NR-U standard or some other standard, in addition to communication with a base station.
  • the communication and processing circuitry 1441 may include one or more hardware components that provide the physical structure that performs processes related to wireless communication (e.g., signal reception and/or signal transmission) and signal processing (e.g., processing a received signal and/or processing a signal for transmission) .
  • the communication and processing circuitry 1441 may be configured to generate and transmit sidelink traffic via the transceiver 1410 and antenna array module 1420.
  • the communication and processing circuitry 1441 may be configured to receive and process sidelink traffic via the antenna array module 1420 and the transceiver 1410.
  • the communication and processing circuitry 1441 may further be configured to execute communication and processing software 1451 stored on the computer-readable medium 1406 to implement one or more functions described herein.
  • the processor 1404 may further include array circuitry 1442, configured, for example, to form (create and manipulate) a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain
  • array circuitry 1442 may further be configured to execute array software 1452 stored on the computer-readable medium 1406 to implement one or more of the functions described herein.
  • the processor 1404 may further include common resource block (CRB) and physical resource block (PRB) identification and ordering circuitry (hereinafter CRB/PRB circuitry 1443) .
  • the CRB/PRB circuitry 1443 may be configured to map (or identify) each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, and may be configured to align a set of PRBs with a set of CRBs according to a frequency offset from a Point A (acommon reference frequency shared by the CRBs and PRBs.
  • the CRB/PRB circuitry 1443 may further be configured to execute CRB/PRB software 1453 stored on the computer-readable medium 1406 to implement one or more functions described herein.
  • the processor 1404 may further include array element selection and identification circuitry 1444.
  • the array element selection and identification circuitry 1444 may be used by the wireless communication device 1400 to select an element of the two-dimensional array that corresponds to a pair of the array interlace index number and the array RB-set index number.
  • the array element selection and identification circuitry 1444 may further be configured to execute array element selection and identification software 1454 stored on the computer-readable medium 1406 to implement one or more functions described herein.
  • the processor 1404 may further include frequency allocation circuitry 1445.
  • the frequency allocation circuitry 1445 may be used by the wireless communication device 1400 to allocate, as a frequency domain resource, one or more PRBs that are members of the one or more previously identified RB-sets and that have interlace index numbers and RB-set index numbers that match the array interlace index number and the array RB-set index number, respectively, of a selected array element.
  • the frequency allocation circuitry 1445 may further be configured to execute frequency allocation software 1455 stored on the computer-readable medium 1406 to implement one or more functions described herein.
  • the wireless communication device 1400 may perform processes and functions described herein, such as in the following paragraphs that describe exemplary mechanisms of determining starting positions of RB-sets and interlaces for elements of the two-dimensional array.
  • a starting position for different sizes of RB-sets and interlaces may be provided by the entity allocating frequency resources.
  • the starting position of RB-sets and interlaces may be related to the number of the allocated RB-sets and interlaces, respectively.
  • the following sequence may give a starting index of an RB-set:
  • FIG. 15A illustrates one example of a two-dimensional array 1502.
  • Row 0 1504 (corresponding to RB 0)
  • row 1 1506 (corresponding to RB 1)
  • row 2 1508 (corresponding to RB 2)
  • row 3 1510 (corresponding to RB 3) are identified.
  • M a total number of RB-sets
  • L the number of allocated resource block sets
  • the series (1) above provides that the starting index numbers of the RB-set may be 0, 1, 2, or 3.
  • the purpose of FIGs. 15A-15E is to provide four possible locations for the starting index number of an RB-set.
  • the starting index numbers are row dependent.
  • FIG. 15B is presented to provide one example of an RB-set beginning at row 0 1504.
  • the exemplary starting index number of the interlace/RB-set array element is row 0, column 2 (0, 2) ; however, for one interlace/RB-set array element (as shown) , any column (any interlace) on row 0 1504 could be used to illustrate an RB-set beginning at row 0 1504 (e.g., (0, 0) , (0, 1) , (0, 2) , (0, 3) , (0, 4) ) .
  • FIG. 15C is presented to provide one example of an RB-set beginning at row 1 1506.
  • the exemplary starting index number of the interlace/RB-set array element is row 1, column 0 (1, 0) .
  • interlaces 1 and 2 are identified for purposes of example only.
  • columns 0, 1, or 2 on row 1 1506 could be used (subject to the requirements of the starting index of interlaces to be described below) to illustrate an RB-set beginning at row 1 1506 (e.g., (1, 0) , (1, 1) , (1, 2) ) .
  • FIG. 15D is presented to provide one example of a starting index of an RB-set being identified as row 2 1508.
  • the exemplary starting index number of the interlace/RB-set array element is row 2, column 3 (2, 3) .
  • Interlace 3 and interlace 4 are identified for purposes of example only.
  • columns 0, 1, 2, or 3 on row 2 1508 could be used (subject to the requirements of the start position of interlaces to be described below) to illustrate an RB-set beginning at row 2 1508 (e.g., (2, 0) , (2, 1) , (2, 2) , (2, 3) ) .
  • FIG. 15E is presented to provide one example of an RB-set beginning at row 3 1510.
  • the exemplary start position (e.g., index number) of the interlace/RB-set array element is row 3, column 0 (3, 0) .
  • interlaces 1, 2, 3, and 4 are identified for purposes of example only.
  • column 0 may be the sole choice for a starting interlace position (subject to the requirements of the start position of interlaces to be described below) to illustrate an RB-set beginning at row 3 1510 (e.g., (3, 0) ) .
  • FIG. 16A illustrates one example of a two-dimensional array 1602.
  • Row 0 1504 (corresponding to RB 0) and row 2 1508 (corresponding to RB 2) are identified.
  • the possible starting indexes of an RB-set may be 0 or 2.
  • the purpose of FIGs. 16A-16C is to provide two possible locations for the start of an RB-set. The start locations are row dependent.
  • FIG. 16B is presented to provide one example of an RB-set beginning at row 0 1604.
  • the exemplary start position of the interlace/RB-set array element is row 0, column 0 (0, 0) .
  • interlace 0, interlaces 1 and 2 on row 0 and interlaces 0, 1, and 2 on row 1 1606 are identified for purposes of example only.
  • columns 0, 1, or 2 on row 0 1604 could be used (subject to the requirements of the start position of interlaces to be described below) to illustrate an RB-set beginning at row 0 1604 (e.g., (0, 0) , (0, 1) , (0, 2) ) .
  • FIG. 16C is presented to provide one example of an RB-set beginning at row 2 1608.
  • the exemplary start position of the interlace/RB-set array element is row 2, column 1 (2, 1) .
  • interlace 1 on row 3 1610 is identified for purposes of example only.
  • columns 0, 1, 2, 3, or 4 on row 2 1608 could be used (subject to the requirements of the start position of interlaces to be described below) to illustrate an RB-set beginning at row 2 1608 (e.g., (2, 0) , (2, 1) , (2, 2) , (2, 3) , (2, 4) ) .
  • FIG. 17A illustrates one example of a two-dimensional array 1702.
  • Row 0 1504 (corresponding to RB 0) is identified.
  • the possible starting indexes of an RB-set may be 0.
  • the purpose of FIGs. 17A-17B is to provide one possible location for the start of an RB-set. The start locations are row dependent.
  • FIG. 17B is presented to provide one example of an RB-set beginning at row 0 1704.
  • the exemplary start position of the interlace/RB-set array element is row 0, column 0 (0, 0) .
  • interlace 0, interlace 0 on rows 1, 2, and 3 and interlace 1 on rows 0-3 are identified for purposes of example only.
  • columns 0, 1, 2, or 3 on row 0 1704 could be used (subject to the requirements of the start position of interlaces to be described below) to illustrate an RB-set beginning at row 0 1704 (e.g., (0, 0) , (0, 1) , (0, 2) , (0, 4) ) .
  • a starting point for frequency allocation in terms of an interlace may be dependent a total number of interlaces, N and the number of interlaces allocated, K.
  • N the number of interlaces allocated
  • K the number of interlaces allocated
  • a starting interlace index may be given by the following series:
  • FIG. 18A illustrates one example of a two-dimensional array 1802.
  • Column 0 1804 (corresponding to interlace 0)
  • column 3 1806 (corresponding to interlace 3)
  • column 6 1808 (corresponding to interlace 6) are identified.
  • the possible starting indexes of the interlaces may be 0, 3, or 6.
  • the purpose of FIGs. 18A-18D is to provide three possible locations for the starting index of interlaces.
  • the starting index of interlaces is column dependent.
  • the starting positions of the RB-sets with respect to the rows (e.g., the RB-sets) is exemplary.
  • FIG. 18B is presented to provide one example of a starting index of interlaces beginning at column 0 1804.
  • the exemplary starting interlace/RB-set array element is row 2, column 0 (2, 0) .
  • interlace 0, interlaces 1 and 2 on row 2 and interlaces 0, 1, and 2 on row 3 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 0 for column 0 1804 (e.g., (0, 0) , (1, 0) , (2, 0) ) .
  • FIG. 18C is presented to provide one example of a starting index of interlaces beginning at column 3 1806.
  • the exemplary starting interlace/RB-set array element is row 0, column 3 (0, 3) .
  • interlaces 4 and 5 on row 0 and interlaces 3, 4, and 5 on row 1 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 3 for column 3 1806 (e.g., (0, 3) , (1, 3) , (2, 3) ) .
  • FIG. 18D is presented to provide one example of a starting index of interlaces beginning at column 6 1808.
  • the exemplary starting interlace/RB-set array element is row 0, column 6 (0, 6) .
  • interlaces 7 and 8 on row 0 and interlaces 6, 7, and 8 on rows 1, 2, and 3 are identified for purposes of example only.
  • a resource block set represented on row 0 may be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 6 for column 6 1808 (e.g., (0, 6) ) .
  • FIG. 19A illustrates one example of a two-dimensional array 1902.
  • Column 0 1904 (corresponding to interlace 0)
  • column 3 1906 (corresponding to interlace 3)
  • column 6 1908 (corresponding to interlace 6) are identified.
  • the possible starting indexes of the interlaces may be 0 or 5.
  • the purpose of FIGs. 19A-19C is to provide two possible locations for the starting index of interlaces.
  • the starting index of interlaces is column dependent.
  • FIG. 19B is presented to provide one example of a starting index of interlaces beginning at column 0 1904.
  • the exemplary starting interlace/RB-set array element is row 2, column 0 (2, 0) .
  • interlace 0, interlaces 1, 2, 3, and 4 on row 2 and interlaces 0, 1, 2, 3, and 4 on row 3 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 0 for column 0 1904 (e.g., (0, 0) , (1, 0) , (2, 0) ) .
  • FIG. 19C is presented to provide one example of a starting index of interlaces beginning at column 5 1908.
  • the exemplary starting interlace/RB-set array element is row 0, column 5 (0, 5) .
  • interlaces 6, 7, 8, and 9 on row 0 and interlaces 5, 6, 7, 8, and 9 on row 1 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 5 for column 5 1908 (e.g., (0, 5) , (1, 5) , (2, 5) ) .
  • a starting point for frequency allocation in terms of an interlace may be dependent a total number of interlaces, N and the number of interlaces allocated, K.
  • N the number of interlaces allocated
  • K the number of interlaces allocated
  • FIG. 20A illustrates one example of a two-dimensional array 2002.
  • Column 0 2004 (corresponding to interlace 0) and column 3 2006 (corresponding to interlace 3) are identified.
  • the possible starting indexes of the interlaces may be 0 or 3.
  • the purpose of FIGs. 20A-20C is to provide two possible locations for the starting index of interlaces.
  • the starting index of interlaces is column dependent.
  • FIG. 20B is presented to provide one example of a starting index of interlaces beginning at column 0 2004.
  • the exemplary starting interlace/RB-set array element is row 0, column 0 (0, 0) .
  • interlace 0, interlace 2 on row 0 and interlaces 0 and 1 on row 2 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 0 for column 0 2004 (e.g., (0, 0) , (1, 0) , (2, 0) ) .
  • FIG. 20C is presented to provide one example of a starting index of interlaces beginning at column 3 2006.
  • the exemplary starting interlace/RB-set array element is row 2, column 3 (2, 3) .
  • interlace 3 on row 2 and interlaces 3 and 4 on row 3 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 3 for column 3 2006 (e.g., (0, 3) , (1, 3) , (2, 3) ) .
  • FIG. 21A illustrates one example of a two-dimensional array 2102.
  • Column 0 2004 (corresponding to interlace 0) is identified.
  • the possible starting index of the interlaces may be 0.
  • the purpose of FIGs. 20A-20C is to provide two possible locations for the starting index of interlaces.
  • the starting index of interlaces is column dependent.
  • FIG. 21B is presented to provide one example of a starting index of interlaces beginning at column 0 2104.
  • the exemplary starting interlace/RB-set array element is row 2, column 0 (2, 0) .
  • interlace 0, interlace 1 and 2 on row 2 and interlaces 0, 1, and 2 on row 3 are identified for purposes of example only.
  • resource block sets represented on rows 0, 1, or 2 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 0 for column 0 2104 (e.g., (0, 0) , (1, 0) , (2, 0) ) .
  • FIG. 21B is presented to provide one example of a starting index of interlaces beginning at column 0 2104.
  • the exemplary starting interlace/RB-set array element is row 1, column 0 (1, 0) .
  • resource block sets represented on rows 0, 1, 2, or 3 could be used (subject to the requirements of the start position of resource block sets described above) to illustrate a starting index of 0 for column 0 2104 (e.g., (0, 0) , (1, 0) , (2, 0) , (3, 0) ) .
  • a nested structure of the available resource allocations may be implemented.
  • the radio resource control may configure one or more different types of nesting structures.
  • the nesting structures described below are exemplary. Other nesting structures may be formed similarly to those described below and are within the scope of this disclosure.
  • FIG. 22 illustrates one example of a two-dimensional array 2202 of frequency resources.
  • a first example of a nesting structure may be referred to as an RB-set first nesting structure.
  • the RB-set first nesting structure is a structure that may minimize the number of RB-sets needed for a certain number of resources and thereby may minimize a look before talk (LBT) bandwidth.
  • LBT look before talk
  • the two-dimensional array 2202 of frequency resources may be divided in the RB-set frequency domain 2204 either once or several times 2206.
  • the resultant sets of BR set domain frequency resources may be divided in the interlace frequency domain 2208.
  • the number of divisions in the RB-set frequency domain and the interlace frequency domain may be dependent on the needs for allocation of frequency resources.
  • a two-dimensional array 2202 may be configured as a plurality of rows and a plurality of columns, each row corresponding sequentially to one of the array RB-set index numbers in an RB-set frequency domain and each column corresponding sequentially to one of the array interlace index numbers in an interlace frequency domain.
  • reforming the two-dimensional array as a nested structure for allocating frequency domain resources may be accomplished by, for example, obtaining a first resultant two-dimensional array by dividing the two-dimensional array in the RB-set frequency domain 2204, 2206.
  • the wireless communication device may obtain a second resultant two-dimensional array by dividing the first resultant two-dimensional array in the interlace frequency domain 2208.
  • the wireless communication device may then allocate, as frequency domain resources, one or more interlace/RB-set elements 2210 of the second resultant two-dimensional array.
  • FIG. 23 illustrates another example of a two-dimensional array 2302 of frequency resources.
  • a second example of a nesting structure may be referred to as an interlace first nesting structure.
  • the interlace first nesting structure is a structure that is formed in a way that is opposite to the RB-set first nesting structure described in connection with FIG. 22.
  • the interlace first nesting structure of FIG. 23 may maximizes diversity and may be used, for example, when LBT bandwidth is not a problem.
  • the two-dimensional array 2202 of frequency resources may be divided in the interlace frequency domain 2304 either once or several times 2306, 2308.
  • the resultant sets of interlace frequency domain frequency recourses may be divided in the RB-set frequency domain 2310.
  • the number of divisions in the RB-set frequency domain and the interlace frequency domain may be dependent on the needs for allocation of frequency resources.
  • reforming the two-dimensional array as a nested structure for allocating frequency domain resources may be accomplished by, for example, reforming the two-dimensional array as a nested structure for allocating frequency domain resources by, for example, obtaining a first resultant two-dimensional array by dividing the two-dimensional array in the interlace frequency domain 2304, 2306, 2308.
  • the wireless communication device may next. obtain a second resultant two-dimensional array by dividing the first resultant two-dimensional array in the RB-set frequency domain 2310.
  • the wireless communication device may then allocate, as frequency domain resources, one or more interlace/RB-set elements of the second resultant two-dimensional array 2312.
  • FIG. 24 illustrates yet another example of a two-dimensional array 2402 of frequency resources.
  • a third example of a nesting structure may be referred to a combined RB-set and interlace frequency domain nesting structure.
  • the combined RB-set and interlace frequency domain nesting structure may lie between the RB-set frequency domain first and the interlace frequency domain first nesting structures.
  • Use of the combined RB-set and interlace frequency domain nesting structure may allow for tradeoffs between the RB-set frequency domain first and the interlace frequency domain first nesting structures.
  • the two-dimensional array 2402 of frequency resources may be divided in the RB-set frequency domain 2204 and then divided in the interlace frequency domain 2206, before again being divided in the RB-set frequency domain 2208.
  • the opposite path, to that just described, may be taken. That is, the two-dimensional array 2402 of frequency resources may be divided in the interlace frequency domain (not shown) and then divided in the RB-set frequency domain (not shown) , before again being divided in the interlace frequency domain (not shown) .
  • the number of divisions in the RB-set frequency domain and the interlace frequency domain may be dependent on the needs for allocation of frequency resources.
  • FIG. 25 is a flow chart illustrating an exemplary process 2500 of frequency domain resource allocation of a wireless communication device in a wireless communication network, in accordance with some aspects of the present disclosure.
  • the process 900 e.g., a method
  • the wireless communication device 1400 e.g., a scheduling entity utilizing sidelink in NR-U
  • the process 2500 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • the wireless communication device may form a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain.
  • the wireless communication device may map each physical resource block (PRB) in one or more RB-sets with an with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers.
  • the wireless communication device may select an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number. In some examples, the wireless communication device may select a pair of the array interlace index number and the array RB-set index number.
  • the wireless communication device may allocate, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • the wireless communication device may allocate, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets and that have interlace index numbers and RB-set index numbers that match the array interlace index number and the array RB-set index number, respectively, of the selected element. Thereafter, the process may end.
  • the wireless communication device may also generate the one or more RB-sets by dividing a quantity of PRBs in an original RB-set by an integer number. Still further the wireless communication device may form the two-dimensional array as a rectangular array of the array interlace index numbers in the frequency domain and the array RB-set index numbers in the frequency domain. According to some aspects, there may be more array interlace index numbers than array RB-set index numbers.
  • FIG. 26 is a flow chart illustrating an exemplary process 2600 of frequency domain resource allocation of a wireless communication device in a wireless communication network, in accordance with some aspects of the present disclosure.
  • the process 900 e.g., a method
  • the wireless communication device 1400 e.g., a scheduling entity utilizing sidelink in NR-U
  • the process 2600 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • the wireless communication device may determine that one or more RB-sets corresponds to a plurality of RB-sets.
  • the wireless communication device may determine at least one adjacent pair of the plurality of RB-sets has a plurality of PRBs located in a guard band between the at least one adjacent pair of the plurality of RB-sets.
  • the wireless communication device may allocate, as a frequency domain resource (or as an additional frequency domain resource, one or more of the plurality of PRBs located in the guard band that is identified by the interlace index number that has a value equal to the array interlace index number of the selected element.
  • the wireless communication device may select a first starting index number of the element of the two-dimensional array in an RB-set frequency domain and select a second starting index number of the element of the two-dimensional array in an interlace frequency domain, according to a predefined first series of first stating index numbers and second series of second starting index numbers.
  • the selection of a starting index number of the element of the two-dimensional array in an RB-set frequency domain may be based on a total number of RB-sets in the one or more RB-sets and a number of the total number of RB-sets that are allocated for performance of resource allocation.
  • the wireless communication device may select a starting index number of the element of the two-dimensional array in an interlace frequency domain based on a total number of interlaces and a number of the total number of interlaces that are allocated for performance of resource allocation.
  • selecting the element of the two-dimensional array that corresponds to the pair of the array interlace index number and the array RB-set index number may include selecting a starting RB-set index number in an RB-set frequency domain, selecting a starting interlace index number in an interlace frequency domain; and selecting the element by the starting RB-set index number and the starting interlace index number.
  • selecting the element of the two-dimensional array that corresponds to the pair of the array interlace index number and the array RB-set index number may include determining a starting RB-set index number in an RB-set frequency domain, based on a predefined first mathematical series, determining a starting interlace index number in an interlace frequency domain, based on a predefined second mathematical series, and selecting the element by the starting RB-set index number and the starting interlace index number.
  • the wireless communication device may still further determine a first total number of the one or more RB-sets, determining a second number of RB-sets, from the first total number of RB-sets, that are allocated for frequency resource allocation, determine a third total number of interlaces, determine a fourth number of interlaces, from the fourth total number of interlaces, that are allocated for frequency resource allocation, and select a predefined starting RB-set index number and predefined starting interlace index number based on the first total number, the second number, the third total number, and the fourth number.
  • the apparatus 1400 for wireless communication includes means for forming a two-dimensional array of array interlace index numbers and array resource block set (RB-set) index numbers in the frequency domain, means for mapping each physical resource block (PRB) in one or more RB-sets with a respective interlace index number of the array interlace index numbers and a respective RB-set index number of the array RB-set index numbers, means for selecting an element of the two-dimensional array that corresponds to a selected array interlace index number and a selected array RB-set index number, and means allocating, as a frequency domain resource, one or more PRBs that are members of the one or more RB-sets that comprise the selected array interlace index number and the selected array RB-set index number corresponding to the element.
  • PRB physical resource block
  • the aforementioned means may be the processor (s) 1404 shown in FIG. 14 configured to perform the functions recited by the aforementioned means.
  • the aforementioned means may be a circuit, or any apparatus configured to perform the functions recited by the aforementioned means.
  • circuitry included in the processor 1404 is merely provided as an example, and other means for carrying out the described functions may be included within various aspects of the present disclosure, including but not limited to the instructions stored in the computer-readable medium 1406, or any other suitable apparatus or means described in any one of the FIGs. 1, 2, and/or 3, and utilizing, for example, the processes and/or algorithms described or exemplified herein in relation to FIGs. 5-26.
  • various aspects may be implemented within other systems defined by 3GPP, such as Long-Term Evolution (LTE) , the Evolved Packet System (EPS) , the Universal Mobile Telecommunication System (UMTS) , and/or the Global System for Mobile (GSM) .
  • LTE Long-Term Evolution
  • EPS Evolved Packet System
  • UMTS Universal Mobile Telecommunication System
  • GSM Global System for Mobile
  • Various aspects may also be extended to systems defined by the 3rd Generation Partnership Project 2 (3GPP2) , such as CDMA 2000 and/or Evolution-Data Optimized (EV-DO) .
  • 3GPP2 3rd Generation Partnership Project 2
  • EV-DO Evolution-Data Optimized
  • Other examples may be implemented within systems employing IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Ultra-Wideband (UWB) , Bluetooth, and/or other suitable systems.
  • Wi-Fi IEEE 802.11
  • WiMAX IEEE 8
  • the word “exemplary” is used to mean “serving as an example, instance, or illustration. ” Any implementation or aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects of the disclosure. Likewise, the term “aspects” does not require that all aspects of the disclosure include the discussed feature, advantage, or mode of operation.
  • the term “coupled” is used herein to refer to the direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C may still be considered coupled to one another-even if they do not directly physically touch each other. For instance, a first object may be coupled to a second object even though the first object is never directly physically in contact with the second object.
  • circuit and “circuitry” are used broadly, and intended to include both hardware implementations of electrical devices and conductors that, when connected and configured, enable the performance of the functions described in the present disclosure, without limitation as to the type of electronic circuits, as well as software implementations of information and instructions that, when executed by a processor, enable the performance of the functions described in the present disclosure.
  • FIGs. 1–26 One or more of the components, steps, features and/or functions illustrated in FIGs. 1–26 may be rearranged and/or combined into a single component, step, feature, or function or embodied in several components, steps, or functions. Additional elements, components, steps, and/or functions may also be added without departing from novel features disclosed herein.
  • the apparatus, devices, and/or components illustrated in FIGs. 1–26 may be configured to perform one or more of the methods, features, or steps described herein.
  • the novel algorithms described herein may also be efficiently implemented in software and/or embedded in hardware.
  • “at least one of: a, b, or c” is intended to cover: a; b; c; a and b; a and c; b and c; and a, b and c. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.

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Abstract

Des aspects de l'invention concernent l'attribution de ressources dans le domaine fréquentiel par un dispositif de communication sans fil. L'attribution de ressources peut impliquer la formation d'un réseau bidimensionnel de numéros d'indice d'entrelacement de réseau et de numéros d'indice d'un ensemble de blocs de ressources de réseau (RB-set) dans le domaine fréquentiel, le mappage de chaque bloc de ressources physiques (PRB) dans un ou plusieurs ensembles RB avec un nombre d'indice d'entrelacement respectif des numéros d'indice d'entrelacement de réseau et un numéro d'indice d'ensemble RB respectif des numéros d'indice d'ensemble RB de réseau, la sélection d'un élément du réseau bidimensionnel qui correspond à un numéro d'indice d'entrelacement de réseau sélectionné et à un numéro d'indice d'ensemble de RB de réseau sélectionné, et l'attribution, en tant que ressource dans le domaine fréquentiel, d'un ou de plusieurs PRB qui sont des membres du ou des ensembles RB qui comprennent le numéro d'indice d'entrelacement de réseau sélectionné et le numéro d'indice d'ensemble de RB de réseau sélectionné correspondant à l'élément. La présente invention concerne également d'autres aspects, modes de réalisation et caractéristiques.
PCT/CN2020/083825 2020-04-08 2020-04-08 Attribution de ressources pour une nouvelle liaison latérale sans licence radio (nr-u) WO2021203326A1 (fr)

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WO2023073668A1 (fr) * 2021-10-29 2023-05-04 Lenovo (Singapore) Pte. Ltd. Configuration d'entrelacement de liaison latérale
WO2023116378A1 (fr) * 2021-12-20 2023-06-29 中兴通讯股份有限公司 Procédé de détermination de ressources de communication, procédé de communication, nœud de communication, et support
WO2023141882A1 (fr) * 2022-01-27 2023-08-03 Nec Corporation Procédé, dispositif et support lisible par ordinateur destinés aux communications
WO2023147204A1 (fr) * 2022-01-28 2023-08-03 Qualcomm Incorporated Attribution de ressources de domaine fréquentiel pour formes d'onde entrelacées de liaison latérale
WO2023205954A1 (fr) * 2022-04-24 2023-11-02 Oppo广东移动通信有限公司 Procédé de communication en liaison latérale, dispositif terminal et dispositif de réseau
WO2023207974A1 (fr) * 2022-04-28 2023-11-02 夏普株式会社 Procédé exécuté par un équipement utilisateur, et équipement utilisateur associé
WO2024032193A1 (fr) * 2022-08-11 2024-02-15 华为技术有限公司 Procédé et appareil de détermination de ressources de spectre sans licence
WO2024088415A1 (fr) * 2022-10-28 2024-05-02 中兴通讯股份有限公司 Procédé d'indication de ressources, premier nœud, second nœud et support de stockage

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