WO2021203280A1 - Sélection de largeur de bande pour la communication d'informations de commande de liaison montante - Google Patents

Sélection de largeur de bande pour la communication d'informations de commande de liaison montante Download PDF

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Publication number
WO2021203280A1
WO2021203280A1 PCT/CN2020/083701 CN2020083701W WO2021203280A1 WO 2021203280 A1 WO2021203280 A1 WO 2021203280A1 CN 2020083701 W CN2020083701 W CN 2020083701W WO 2021203280 A1 WO2021203280 A1 WO 2021203280A1
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WO
WIPO (PCT)
Prior art keywords
cyclic shift
uplink control
control information
wireless communication
ramping
Prior art date
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PCT/CN2020/083701
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English (en)
Inventor
Jing Sun
Xiaoxia Zhang
Changlong Xu
Aleksandar Damnjanovic
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/083701 priority Critical patent/WO2021203280A1/fr
Publication of WO2021203280A1 publication Critical patent/WO2021203280A1/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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the technology discussed below relates generally to wireless communication, and more particularly but not exclusively, to techniques for selecting bandwidth for communication of uplink control information.
  • Next-generation wireless communication systems may include a 5G core network and a 5G radio access network (RAN) , such as a New Radio (NR) -RAN.
  • the NR-RAN supports communication via one or more cells.
  • a wireless communication device such as a user equipment (UE) may access a first cell of a first base station (BS) such as a gNB and/or access a second cell of a second BS.
  • BS base station
  • gNB gNode B
  • a BS may schedule access to a cell to support access by multiple UEs. For example, a BS may allocate different resources (e.g., time domain and frequency domain resources) for different UEs operating within a cell of the BS.
  • resources e.g., time domain and frequency domain resources
  • a wireless communication device may use one or more resource block (RB) sets for transmitting uplink control information on a shared radio frequency (RF) spectrum such as an unlicensed band.
  • RB resource block
  • RF radio frequency
  • the maximum transmit power for the wireless communication device may be restricted (e.g., by a regulation) .
  • the wireless communication device may, in some circumstances (e.g., when the wireless communication device is at or near a cell edge) , transmit the uplink control information via multiple RB sets instead of a single RB set in an attempt to close a link with a BS.
  • the BS may schedule multiple RB sets for an uplink transmission by the wireless communication device and monitor each of these RB sets for uplink control information.
  • a method of wireless communication at a wireless communication device may include receiving an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, selecting at least one RB set of the plurality of RB sets, and sending uplink control information via the at least one RB set.
  • RB resource block
  • a wireless communication device may include a transceiver, a memory, and a processor communicatively coupled to the transceiver and the memory.
  • the processor and the memory may be configured to receive, via the transceiver, an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, select at least one RB set of the plurality of RB sets, and send, via the transceiver, uplink control information via the at least one RB set.
  • RB resource block
  • a wireless communication device may include means for receiving an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, means for selecting at least one RB set of the plurality of RB sets, and means for sending uplink control information via the at least one RB set.
  • RB resource block
  • an article of manufacture for use by a wireless communication device includes a computer-readable medium having stored therein instructions executable by one or more processors of the wireless communication device to receive an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, select at least one RB set of the plurality of RB sets, and send uplink control information via the at least one RB set.
  • RB resource block
  • a method of wireless communication at a base station may include generating an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, sending the indication to a wireless communication device, and receiving uplink control information from the wireless communication device via at least one RB set of the plurality of RB sets.
  • RB resource block
  • a base station may include a transceiver, a memory, and a processor communicatively coupled to the transceiver and the memory.
  • the processor and the memory may be configured to generate an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, send the indication to a wireless communication device via the transceiver, and receive, via the transceiver, uplink control information from the wireless communication device via at least one RB set of the plurality of RB sets.
  • RB resource block
  • a base station may include means for generating an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, means for sending the indication to a wireless communication device, and means for receiving uplink control information from the wireless communication device via at least one RB set of the plurality of RB sets.
  • RB resource block
  • an article of manufacture for use by a base station includes a computer-readable medium having stored therein instructions executable by one or more processors of the base station to generate an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum, send the indication to a wireless communication device, and receive uplink control information from the wireless communication device via at least one RB set of the plurality of RB sets.
  • RB resource block
  • FIG. 1 is a schematic illustration of a wireless communication system according to some aspects of the disclosure.
  • FIG. 2 is a conceptual illustration of an example of a radio access network according to some aspects of the disclosure.
  • FIG. 3 is a schematic illustration of wireless resources in an air interface utilizing orthogonal frequency divisional multiplexing (OFDM) according to some aspects of the disclosure.
  • OFDM orthogonal frequency divisional multiplexing
  • FIG. 4 is a conceptual illustration of an example of resources on an uplink interlace according to some aspects of the disclosure.
  • FIG. 5 is a conceptual illustration of an example of uplink control information crossing multiple RB sets according to some aspects of the disclosure.
  • FIG. 6 is a conceptual illustration of an example of different cyclic shift ramping for different RB sets according to some aspects of the disclosure.
  • FIG. 7 is a conceptual illustration of an example of different root sequences for different RB sets according to some aspects of the disclosure.
  • FIG. 8 is a signaling diagram illustrating an example of sub-band transmission according to some aspects of the disclosure.
  • FIG. 9 is a block diagram conceptually illustrating an example of a hardware implementation for a communication device employing a processing system according to some aspects of the disclosure.
  • FIG. 10 is a flow chart illustrating an example wireless communication process according to some aspects of the disclosure.
  • FIG. 11 is a block diagram conceptually illustrating an example of a hardware implementation for a communication device employing a processing system according to some aspects of the disclosure.
  • FIG. 12 is a flow chart illustrating an example wireless communication process according to some aspects of the disclosure.
  • 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 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 at least one scheduled entity 106.
  • the at least one scheduled entity 106 may be referred to as a user equipment (UE) 106 in the discussion that follows.
  • the RAN 104 includes at least one scheduling entity 108.
  • the at least one scheduling entity 108 may be referred to as a base station (BS) 108 in the discussion that follows.
  • the UE 106 may be enabled to carry out data communication with an external data network 110, such as (but not limited to) the Internet.
  • 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 UE 106.
  • the RAN 104 may operate according to 3 rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G.
  • 3GPP 3 rd Generation Partnership Project
  • NR New Radio
  • 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
  • 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 UE.
  • 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 base transceiver station
  • BSS basic service set
  • ESS extended service set
  • AP access point
  • NB Node B
  • eNB eNode B
  • gNB gNode B
  • the radio access network 104 is further illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus may be referred to as user equipment (UE) 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 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.
  • a UE may be an 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.
  • UEs 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, 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.
  • Wireless communication between a RAN 104 and a UE 106 may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 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 (described further below; e.g., base station 108) .
  • Another way to describe this scheme may be to use the term broadcast channel multiplexing.
  • Uplink Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) 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., UE 106) .
  • a scheduling entity e.g., a base station 108 allocates resources for communication among some or all devices and equipment within its service area or cell.
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communication, UEs 106, which may be scheduled entities, may utilize resources allocated by the scheduling entity 108.
  • Base stations 108 are not the only entities that may function as scheduling entities. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other UEs) .
  • a scheduling entity 108 may broadcast downlink traffic 112 to one or more scheduled entities 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 106 to the scheduling entity 108.
  • the scheduled entity 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.
  • 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 or 14 OFDM symbols.
  • a subframe may refer to a duration of 1ms. Multiple subframes or slots may be grouped together to form a single frame or radio frame.
  • OFDM orthogonal frequency division multiplexed
  • a slot may carry 7 or 14 OFDM symbols.
  • a subframe may refer to a duration of 1ms. 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.
  • base stations 108 may include a backhaul interface for communication with a backhaul portion 120 of the wireless communication system.
  • the backhaul 120 may provide a link between a base station 108 and the core network 102.
  • a backhaul network may provide interconnection between the respective base stations 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
  • FIG. 2 a schematic illustration of a RAN 200 is provided.
  • the RAN 200 may be the same as the RAN 104 described above and illustrated in FIG. 1.
  • the geographic area covered by the RAN 200 may be divided into cellular regions (cells) that can be uniquely identified by a user equipment (UE) based on an identification broadcasted from one access point or base station.
  • FIG. 2 illustrates macrocells 202, 204, and 206, and a small cell 208, each of which may include one or more sectors (not shown) .
  • 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 UEs in a portion of the cell.
  • FIG. 2 two base stations 210 and 212 are shown in cells 202 and 204; and a third 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 by feeder cables.
  • the 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 small cell 208 (e.g., a microcell, picocell, femtocell, home base station, home Node B, home eNode B, etc.
  • 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 radio access network 200 may include any number of wireless base stations and cells. Further, 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. In some examples, the base stations 210, 212, 214, and/or 218 may be the same as the base station/scheduling entity 108 described above and illustrated in FIG. 1.
  • the cells may include UEs that may be in communication with one or more sectors of each cell.
  • each base station 210, 212, 214, and 218 may be configured to provide an access point to a core network (e.g., as illustrated in FIG. 1) for all the UEs in the respective cells.
  • UEs 222 and 224 may be in communication with base station 210; UEs 226 and 228 may be in communication with base station 212; UEs 230 and 232 may be in communication with base station 214 by way of RRH 216; and UE 234 may be in communication with base station 218.
  • the UEs 222, 224, 226, 228, 230, 232, 234, 238, 240, and/or 242 may be the same as the UE/scheduled entity 106 described above and illustrated in FIG. 1.
  • an unmanned aerial vehicle (UAV) 220 which may be a drone or quadcopter, can be a mobile network node and may be configured to function as a UE.
  • the UAV 220 may operate within cell 202 by communicating with base station 210.
  • sidelink signals may be used between UEs without necessarily relying on scheduling or control information from a base station.
  • two or more UEs e.g., UEs 226 and 228, may communicate with each other using peer to peer (P2P) or sidelink signals 227 without relaying that communication through a base station (e.g., base station 212) .
  • P2P peer to peer
  • UE 238 is illustrated communicating with UEs 240 and 242.
  • the UE 238 may function as a scheduling entity or a primary sidelink device
  • UEs 240 and 242 may function as a scheduled entity or a non-primary (e.g., secondary) sidelink device.
  • a UE may function as a scheduling entity in a device-to-device (D2D) , peer-to-peer (P2P) , or vehicle-to-vehicle (V2V) network, and/or in a mesh network.
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • UEs 240 and 242 may optionally communicate directly with one another in addition to communicating with the UE 238 (e.g., functioning as a scheduling entity) .
  • a scheduling entity and one or more scheduled entities may communicate utilizing the scheduled resources.
  • the sidelink signals 227 include sidelink traffic (e.g., a physical sidelink shared channel) and sidelink control (e.g., a physical sidelink control channel) .
  • the various physical channels between the UE and the radio access network are generally set up, maintained, and released under the control of an access and mobility management function (AMF) .
  • the AMF (not shown in FIG. 2) 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.
  • SCMF security context management function
  • SEAF security anchor function
  • a radio access network 200 may utilize DL-based mobility or UL-based mobility to enable mobility and handovers (i.e., the transfer of a UE’s connection from one radio channel to another) .
  • a UE 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 UE may maintain communication with one or more of the neighboring cells.
  • the UE may undertake a handoff or handover from the serving cell to the neighboring (target) cell.
  • UE 224 illustrated as a vehicle, although any suitable form of UE may be used
  • the UE 224 may transmit a reporting message to its serving base station 210 indicating this condition.
  • the UE 224 may receive a handover command, and the UE may undergo a handover to the cell 206.
  • UL reference signals from each UE may be utilized by the network to select a serving cell for each UE.
  • 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 UEs 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 UE may be concurrently received by two or more cells (e.g., base stations 210 and 214/216) within the radio access network 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 UE 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 network may continue to monitor the uplink pilot signal transmitted by the UE 224.
  • the network 200 may handover the UE 224 from the serving cell to the neighboring cell, with or without informing the UE 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 UE and the network, since the number of mobility messages that need to be exchanged between the UE and the network may be reduced.
  • the air interface in the radio access network 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. 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
  • the air interface in the radio access network 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 transmissions from UEs 222 and 224 to base station 210, and for multiplexing for DL transmissions from base station 210 to one or more UEs 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 UEs 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 radio access network 200 may further 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 cancelation 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 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 per slot.
  • FIG. 3 an expanded view of an example DL subframe (SF) 302A is illustrated, showing an OFDM resource grid.
  • SF DL subframe
  • the PHY transmission structure for any particular application may vary from the example described here, depending on any number of factors.
  • time is in the horizontal direction with units of OFDM symbols; and frequency is in the vertical direction with units of subcarriers.
  • the resource grid 304 may be used to schematically represent time–frequency resources for 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 304 may be available for communication.
  • the resource grid 304 is divided into multiple resource elements (REs) 306.
  • 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) 308, which contains any suitable number of consecutive 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 OFDM symbols in the time domain.
  • Scheduling of UEs typically involves scheduling one or more resource elements 306 within one or more bandwidth parts (BWPs) , where each BWP includes two or more contiguous or consecutive RBs.
  • BWPs bandwidth parts
  • a UE generally utilizes only a subset of the resource grid 304.
  • an RB may be the smallest unit of resources that can be allocated to a UE.
  • the RB 308 is shown as occupying less than the entire bandwidth of the subframe 302A, with some subcarriers illustrated above and below the RB 308.
  • the subframe 302A may have a bandwidth corresponding to any number of one or more RBs 308.
  • the RB 308 is shown as occupying less than the entire duration of the subframe 302A, although this is merely one possible example.
  • Each 1 ms subframe 302A may consist of one or multiple adjacent slots.
  • one subframe 302B includes four slots 310, as an illustrative example.
  • a slot may be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length.
  • CP cyclic prefix
  • a slot may include 7 or 14 OFDM symbols with a nominal CP.
  • Additional examples may include mini-slots having a shorter duration (e.g., one or two OFDM symbols) . These mini-slots may in some cases be transmitted occupying resources scheduled for ongoing slot transmissions for the same or for different UEs.
  • An expanded view of one of the slots 310 illustrates the slot 310 including a control region 312 and a data region 314.
  • the control region 312 may carry control channels (e.g., PDCCH)
  • the data region 314 may carry data channels (e.g., PDSCH or PUSCH) .
  • 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. 3 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 306 within a RB 308 may be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc.
  • Other REs 306 within the RB 308 may also carry pilots or reference signals, including but not limited to a demodulation reference signal (DMRS) or a sounding reference signal (SRS) .
  • DMRS demodulation 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 308.
  • the transmitting device may allocate one or more REs 306 (e.g., within a control region 312) to carry DL control information including one or more DL control channels, such as a PBCH; 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.
  • DL control channels such as a PBCH; 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.
  • the transmitting device may further allocate one or more REs 306 to carry other DL signals, such as a DMRS; a phase-tracking reference signal (PT-RS) ; a channel state information –reference signal (CSI-RS) ; a primary synchronization signal (PSS) ; and a secondary synchronization signal (SSS) .
  • a DMRS a DMRS
  • PT-RS phase-tracking reference signal
  • CSI-RS channel state information –reference signal
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • the synchronization signals PSS and SSS may be transmitted in a synchronization signal block (SSB) that includes 3 consecutive OFDM symbols, numbered via a time index in increasing order from 0 to 3.
  • SSB synchronization signal block
  • the SSB may extend over 240 contiguous subcarriers, with the subcarriers being numbered via a frequency index in increasing order from 0 to 239.
  • the present disclosure is not limited to this specific SSB configuration.
  • Nonlimiting examples may utilize greater or fewer than two synchronization signals; may include one or more supplemental channels in addition to the PBCH; may omit a PBCH; and/or may utilize a different number of symbols and/or nonconsecutive symbols for an SSB, within the scope of the present disclosure.
  • the SSB may be used to send system information (SI) and/or provide a reference to SI transmitted via another channel.
  • system information may include, but are not limited to, subcarrier spacing, system frame number, a cell global identifier (CGI) , a cell bar indication, a list of common control resource sets (coresets) , a list of common search spaces, a search space for SIB1, a paging search space, a random access search space, and uplink configuration information.
  • coresets Two specific examples of coresets include PDCCH Coreset 0 and Coreset 1.
  • the SI may be subdivided into three sets referred to as minimum SI (MSI) , remaining MSI (RMSI) , and other SI (OSI) .
  • the PBCH may carry the MSI and some of the RMSI.
  • the PBCH may carry a master information block (MIB) that includes various types of system information, along with parameters for decoding a system information block (SIB) .
  • MIB master information block
  • SIB system information block
  • the RMSI may include, for example, a SystemInformationType1 (SIB1) that contains various additional system information.
  • SIB1 SystemInformationType1
  • the RMSI may be carried by a PDSCH (e.g., at a dedicated Coreset 0) .
  • 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, 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 transmitting device may utilize one or more REs 306 to carry UL control information including one or more UL control channels, such as a physical uplink control channel (PUCCH) , to the scheduling entity.
  • UL control information 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 UL control information may include a DMRS or SRS.
  • the control information 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 that may schedule resources for uplink packet transmissions.
  • UL control information may also include HARQ feedback, channel state feedback (CSF) , or any other suitable UL control information.
  • one or more REs 306 may be allocated for user data or traffic data. Such traffic may be carried on one or more traffic channels, such as, for a DL transmission, a PDSCH; or for an UL transmission, a physical uplink shared channel (PUSCH) .
  • one or more REs 306 within the data region 314 may be configured to carry SIBs (e.g., SIB1) , carrying system information that may enable access to a given cell.
  • Transport channels carry blocks of information called transport blocks (TB) .
  • TBS transport block size
  • MCS modulation and coding scheme
  • channels or carriers described above with reference to FIGs. 1 -3 are not necessarily all of the channels or carriers that may be utilized between a scheduling entity and scheduled entities, 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 may use unlicensed radio frequency (RF) spectrum in some scenarios.
  • RF radio frequency
  • a network operator may deploy cells that are configured to communicate on an unlicensed RF spectrum (e.g., in addition to cells operating on a licensed RF spectrum) to extend the coverage of the network or to provide additional services (e.g., higher throughput) to UEs operating within the network.
  • unlicensed RF spectrum e.g., in addition to cells operating on a licensed RF spectrum
  • additional services e.g., higher throughput
  • devices that transmit over unlicensed RF spectrum may use a collision avoidance scheme to reduce the possibility that multiple devices will transmit on the same band at the same time.
  • a collision avoidance scheme is a listen-before-talk (LBT) procedure.
  • LBT listen-before-talk
  • the first device may listen for transmissions by another device. If the resource is currently being used, the first device may back-off for a period of time and then re-attempt transmission (e.g., by listening for other transmissions again) . The first device could also select a different resource in the unlicensed band. If the resource is free, the first device may reserve the resource for a subsequent communication.
  • Carrier sense multiple access CSMA
  • CSMA Carrier sense multiple access
  • NR-U NR operation in the unlicensed RF spectrum
  • NR-U some transmissions may be subject to LBT.
  • a wireless device such as a UE or an eNB may perform a clear channel assessment (CCA prior to gaining control of a wireless channel in an unlicensed band.
  • CCA clear channel assessment
  • a gNB scheduling of uplink and downlink transmissions may be subject to LBT.
  • a BS may schedule uplink transmissions for UEs, specifying which time-domain and frequency-domain resources each UE is to use for its respective uplink transmission.
  • interlaced-based scheduling may be used in the frequency domain.
  • a PRB interlaced waveform may be used in the UL to satisfy occupied channel bandwidth (OCB) goals and/or to boost UL transmit power for a given power spectral density (PSD) limitation.
  • OCB occupied channel bandwidth
  • PSD power spectral density
  • a BS may schedule a UE to transmit according to one of more of the interlaces. For example, a BS may schedule a first UE to transmit on interlace 0 and schedule a second UE to transmit on interlace 1. As another example, a BS may schedule a first UE to transmit on interlace 0 and interlace 1. Other examples are possible.
  • FIG. 4 illustrates an example of an UL interlace 400 (e.g., for NR-U) .
  • a given interlace may correspond to a set of frequency resources.
  • each block (e.g., block 402) in FIG. 4 may correspond to a resource block.
  • FIG. 4 also illustrates that different sets of RBs (e.g., RB set 0 and RB set 1, etc. ) may be defined with respect to an interlace.
  • each RB set includes ten RBs of the interlace.
  • a different number of RBs per RB set may be used in other examples.
  • Wireless communication operations in certain frequency bands may be subject to regulatory restrictions (e.g., FCC regulation) .
  • FCC regulation e.g., FCC regulation
  • Table 1 describes an example of a 6 GHz band. This band is currently used, for example, for microwave communication, backhaul communication, and video camera communication.
  • maximum transmit power on this band may be limited to, for example, 5 decibel-milliwatts/MHz (dBm/MHz) for a gNB and -1 dBm/MHz for a UE. This is to protect incumbent users of this band (e.g., video cameras) .
  • use of the 6 GHz band may be subject to a transmit power limit that is lower than the transmit power limit imposed on other bands.
  • maximum transmit power on a 5 GHz band may be limited to, for example, 10 dBm/MHz for a gNB and 10 dBm/MHz for a UE.
  • PSD power spectral density
  • the link budget may be reduced.
  • the disclosure relates in some aspects to regaining this loss of link budget.
  • the uplink may be weaker (e.g., by 6 dB relatively) .
  • the disclosure relates in some aspects to balancing the link budget between the downlink and the uplink.
  • the disclosure relates in some aspects to increasing the effective transmit power by transmitting signals with a wider bandwidth.
  • the 3GPP Rel. 16 NR-U PUCCH covers 20 MHz with a PRB interlace structure. This may be relatively low given the low PSD limitation.
  • the disclosure thus relates in some aspects to a wider band PUCCH. For example, as shown in Table 2, for a UE, an increase of 3 dBm may be achieved using a 40 MHz bandwidth instead of a 20 MHz bandwidth. In addition, an increase of 6 dBm may be achieved using an 80 MHz bandwidth instead of a 20 MHz bandwidth.
  • Equation 1 the cyclic shift ⁇ l of a PRB is defined as set forth in Equation 1:
  • m int controls the interlaced waveform cyclic shift ramping.
  • the parameter is the PRB index within the interlace starting from the edge of the BWP.
  • the first PRB of the interlace in the BWP is indexed as 0, and so on.
  • Within 12 PRBs of an interlace since 5 is co-prime with 12, the resulting cyclic shift will not repeat. Beyond 12 PRBs, there will be repetitions.
  • the same cyclic shift may repeat every 12 PRBs in the interlace as shown in FIG. 4.
  • the cyclic shift ramping is 0 in the first RB of both 12 RB sets, the cyclic shift ramping is 5 in the second RB of both 12 RB sets, and so on.
  • this regularity may negatively impact the peak-to-average power ratio (PAPR) .
  • PAPR peak-to-average power ratio
  • the disclosure relates in some aspects to avoiding the regular pattern across RB sets that results from Equation 1.
  • the disclosure relates in some aspects to extending the PUCCH waveform to more than 20 MHz.
  • the interlaced waveform with 10 RBs in 20 MHz may provide a 9 dBm transmit power.
  • the interlaced waveform with 10 RBs in 80 MHz may provide a 15 dBm transmit power (an increase of 6 dBm) .
  • PUCCH 502 crosses RB set 0 and RB set 1 to include a total of 22 RBs.
  • a single 20 MHz PUCCH e.g., as specified in 3GPP Rel. 16
  • the disclosure relates in some aspects to avoiding the regular pattern across RB sets (e.g., as shown in FIG. 5) by using different cyclic shift ramping for different RB sets.
  • Equation 2 the cyclic shift ⁇ l of a PRB is defined as set forth in Equation 2:
  • the step sizes may designed so that combining m int and m RBset results in cyclic shift ramping with a step size that is co-prime with 12.
  • the cyclic shift ramping sequence for RB set 0 is 0, 5, 10, 3, etc.
  • the cyclic shift ramping sequence for RB set 1 is 0, 7, 2, 9, etc.
  • the design may fall back to the use of only m int (as in 3GPP Rel. 16 NR-U) .
  • the disclosure relates in some aspects to using different root sequences for different RB sets.
  • a root sequence change may be introduced for different RB sets.
  • the root sequence may be a function of cell ID, hopping ID (if configured) and time (if group hopping is configured) .
  • the first RB set used by the PDCCH may use a legacy root sequence (e.g., a root sequence as defined in 3GPP TS 38.211, section 5.2, December 2019) .
  • backward compatibility may be maintained if only one RB set is used for PUCCH.
  • multiple RB sets are used (e.g., more than 12 RBs are needed)
  • a different root sequence may be used. For example, as shown in FIG. 7, the first 12 RBs are generated using a root sequence based on an index u 0 , while the second 12 RBs are generated using a root sequence based on an index u 1 .
  • each additional root sequence (e.g., used for RB set 1, 2, etc. ) may be a function of the first root sequence (e.g., used for RB set 0) .
  • a root sequence index u i may be defined as set forth in Equation 3:
  • R may be chosen as a number that is co-prime with 30.
  • the parameter u may correspond to the index used for the first root sequence.
  • Different payload sizes may be used for an uplink transmission (e.g., PUCCH) in different scenarios.
  • a 3GPP PUCCH format (PF) 2 or PF 3 may include more than two bits. Multiple RBs may be used (e.g., up to 16 RBs) depending on the payload size.
  • 3GPP Rel. 16 NR-U extends the PUCCH PF2/3 to a PRB interlaced structure with up to 2 interlaces within one RB set.
  • the disclosure relates in some aspects to supporting a single interlace in multiple RB sets (e.g., up to 4 RB sets in some examples) .
  • a mode may be defined (e.g., subject to RRC configuration) that supports a single interlace with up to 4 RB sets.
  • the uses of the interlace may be incremented in unit of RB sets. For example, if the payload is small, one RB set may be used for the interlace. If the payload is larger, two or more RB sets may be used for the interlace.
  • PUCCH may be defined to use a 20 MHz bandwidth on an unlicensed band.
  • the LBT bandwidth is also 20 MHz.
  • the PUCCH may be transmitted in an all-or-nothing fashion. For example, the transmission may be made only if all of the 20 MHz RB sets pass the LBT test.
  • the disclosure relates in some aspects to selecting the resources to be used for PUCCH based on the LBT results on the allocated sub-bands (e.g., RB sets) .
  • the ACK/NACK information transmitted by PUCCH may be relatively important, thus, it is desirable to transmit this information as soon as possible.
  • sub-band based transmission of PUCCH may be feasible.
  • a UE may send PUCCH RBs in the RB sets that passed the LBT operation.
  • Support for this feature may be controlled by a gNB and may be subject to UE capability.
  • a gNB may signal (e.g., in a configuration message) whether it allows this feature.
  • a UE may signal (e.g., in a capability message) whether it supports this feature.
  • FIG. 8 illustrates several examples of the sub-band transmission.
  • LBT passed for both RB sets, therefore the PUCCH is sent in both RB Set 0 and RB set 1.
  • LBT passed for both RB sets, therefore the PUCCH is sent in both RB Set 0 and RB set 1.
  • FIG. 8 also illustrates two different options for handling any RBs 808 of PUCCH that occur between two RB sets.
  • the middle RBs 808 are used to transmit PUCCH if the RB sets on both sides of the middle RBs 808 are transmitted.
  • the middle RBs 808 are used to transmit PUCCH in the example 802 but not in the example 804.
  • the middle RBs 808 are never used to transmit the PUCCH.
  • FIG. 9 is a diagram illustrating an example of a hardware implementation for a wireless communication device 900 employing a processing system 914.
  • the wireless communication device 900 may be a user equipment (UE) or other device configured to wirelessly communicate with a base station, as discussed in any one or more of FIGs. 1 –8.
  • UE user equipment
  • an element, or any portion of an element, or any combination of elements may be implemented with a processing system 914 that includes one or more processors 904.
  • the wireless communication device 900 may correspond to one or more of the scheduled entity 106 (e.g., a UE, etc. ) of FIG. 1 and/or the UE 222, 224, 226, 228, 230, 232, 234, 238, 240, or 242 FIG. 2.
  • the wireless communication device 900 may be implemented with a processing system 914 that includes one or more processors 904.
  • processors 904 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 900 may be configured to perform any one or more of the functions described herein. That is, the processor 904, as utilized in a wireless communication device 900, may be used to implement any one or more of the processes and procedures described below.
  • the processing system 914 may be implemented with a bus architecture, represented generally by the bus 902.
  • the bus 902 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 914 and the overall design constraints.
  • the bus 902 communicatively couples together various circuits including one or more processors (represented generally by the processor 904) , a memory 905, and computer-readable media (represented generally by the computer-readable medium 906) .
  • the bus 902 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 908 provides an interface between the bus 902 and a transceiver 910 and between the bus 902 and an interface 930.
  • the transceiver 910 provides a communication interface or means for communicating with various other apparatus over a wireless transmission medium.
  • the wireless communication device may include two or more transceivers 910, each configured to communicate with a respective network type (e.g., terrestrial or non-terrestrial) .
  • the interface 930 provides a communication interface or means of communicating with various other apparatus and devices (e.g., other devices housed within the same apparatus as the wireless communication device or other external apparatus) over an internal bus or external transmission medium, such as an Ethernet cable.
  • a user interface 912 e.g., keypad, display, speaker, microphone, joystick
  • a user interface 912 is optional, and may be omitted in some examples, such as an IoT device.
  • the processor 904 is responsible for managing the bus 902 and general processing, including the execution of software stored on the computer-readable medium 906.
  • the software when executed by the processor 904, causes the processing system 914 to perform the various functions described below for any particular apparatus.
  • the computer-readable medium 906 and the memory 905 may also be used for storing data that is manipulated by the processor 904 when executing software.
  • One or more processors 904 in the processing system may execute software.
  • 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 may reside on a computer-readable medium 906.
  • the computer-readable medium 906 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 906 may reside in the processing system 914, external to the processing system 914, or distributed across multiple entities including the processing system 914.
  • the computer-readable medium 906 may be embodied in a computer program product.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the wireless communication device 900 may be configured to perform any one or more of the operations described herein (e.g., as described above in conjunction with FIGs. 1 -8 and as described below in conjunction with FIG. 10) .
  • the processor 904 as utilized in the wireless communication device 900, may include circuitry configured for various functions.
  • the processor 904 may include communication and processing circuitry 941.
  • the communication and processing circuitry 941 may include one or more hardware components that provide the physical structure that performs various processes related to wireless communication (e.g., signal reception and/or signal transmission) as described herein.
  • the communication and processing circuitry 941 may further include one or more hardware components that provide the physical structure that performs various processes related to signal processing (e.g., processing a received signal and/or processing a signal for transmission) as described herein.
  • the communication and processing circuitry 941 may include two or more transmit/receive chains, each configured to process signals in a different RAT (or RAN) type.
  • the communication and processing circuitry 941 may further be configured to execute communication and processing software 951 included on the computer-readable medium 906 to implement one or more functions described herein.
  • the communication and processing circuitry 941 may obtain information from a component of the wireless communication device 900 (e.g., from the transceiver 910 that receives the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium) , process (e.g., decode) the information, and output the processed information.
  • the communication and processing circuitry 941 may output the information to another component of the processor 904, to the memory 905, or to the bus interface 908.
  • the communication and processing circuitry 941 may receive one or more of signals, messages, other information, or any combination thereof.
  • the communication and processing circuitry 941 may receive information via one or more channels.
  • the communication and processing circuitry 941 may include functionality for a means for receiving.
  • the communication and processing circuitry 941 may obtain information (e.g., from another component of the processor 904, the memory 905, or the bus interface 908) , process (e.g., encode) the information, and output the processed information.
  • the communication and processing circuitry 941 may output the information to the transceiver 910 (e.g., that transmits the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium) .
  • the communication and processing circuitry 941 may send one or more of signals, messages, other information, or any combination thereof.
  • the communication and processing circuitry 941 may send information via one or more channels.
  • the communication and processing circuitry 941 may include functionality for a means for sending (e.g., means for transmitting) .
  • the processor 904 may include resource selection circuitry 942 configured to perform resource selection-related operations as discussed herein (e.g., selecting one or more RB sets to close a link to a BS) .
  • the resource selection circuitry 942 may include functionality for a means for selecting at least one RB set.
  • the resource selection circuitry 942 may further be configured to execute resource selection software 952 included on the computer-readable medium 906 to implement one or more functions described herein.
  • the processor 904 may include waveform generation circuitry 943 configured to perform waveform generation-related operations as discussed herein (e.g., generating PUCCH signals) .
  • the waveform generation circuitry 943 may include functionality for a means for generating cyclic shift ramping.
  • the waveform generation circuitry 943 may further be configured to execute waveform generation software 953 included on the computer-readable medium 906 to implement one or more functions described herein.
  • FIG. 10 is a flow chart illustrating an example process 1000 for a wireless communication system in accordance with some aspects of the present disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments.
  • the process 1000 may be carried out by the wireless communication device 900 illustrated in FIG. 9.
  • the wireless communication device may be a user equipment.
  • the process 1000 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • a wireless communication device may receive an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum.
  • the communication and processing circuitry 941 and transceiver 910 shown and described above in connection with FIG. 9, may receive a grant from a BS.
  • the shared radio frequency spectrum may include an unlicensed radio frequency spectrum.
  • the plurality of RB sets may include a plurality of contiguous RB sets.
  • the wireless communication device may be a user equipment.
  • the wireless communication device may select at least one RB set of the plurality of RB sets.
  • the resource selection circuitry 942 shown and described above in connection with FIG. 9, may select a sufficient number of RB sets for a PUCCH transmission to close a link to a BS.
  • the at least one RB set may include a first RB set and a second RB set.
  • the at least one RB set may include at least two RB sets.
  • selecting at least one RB set of the plurality of RB sets may include if a target transmit power for sending the uplink control information is less than a threshold, selecting one RB set of the plurality of RB sets; and if the target transmit power for sending the uplink control information is greater than the first threshold, selecting at least two RB sets of the plurality of RB sets.
  • selecting at least one RB set of the plurality of RB sets may include selecting the first RB set if a size of the uplink control information is less than a first threshold; and selecting the first RB set and the second RB set if the size of the uplink control information is greater than the first threshold.
  • the wireless communication device may send uplink control information via the at least one RB set.
  • the waveform generation circuitry 943 in cooperation with the communication and processing circuitry 941 and transceiver 910, shown and described above in connection with FIG. 9, may encode and transmit uplink control signals.
  • the uplink control information may be sent on a physical uplink control channel (PUCCH) .
  • the uplink control information includes more than two bits, the first RB set and the second RB set may be scheduled on a single physical resource block (PRB) interlace.
  • PRB physical resource block
  • the method may further include generating cyclic shift ramping for different RBs of the at least one RB set for sending the control information, wherein the cyclic shift ramping may be based on a combination of a first cyclic shift ramping and a second cyclic shift ramping, and wherein the second cyclic shift ramping may be different from the first cyclic shift ramping.
  • the first cyclic shift ramping may be based on a cyclic shift equation that may include a first cyclic shift ramping value that may be based on interlace resource block (IRB) indices within a PRB interlace; and the second cyclic shift ramping may be based on the cyclic shift equation that may include a second cyclic shift ramping value that may be based on an RB set index.
  • a sum of the first cyclic shift ramping value and the second cyclic shift ramping value for a particular RB set of the at least one RB set may be coprime with a length of resource elements (REs) in an RB of the at least one RB set.
  • REs resource elements
  • the method may further include generating first information for the first RB set using a first sequence; and generating second information for the second RB set using a second sequence, wherein the second sequence may be different from the first sequence.
  • the first sequence may be based on a first cyclic shift of a first base pseudo-random sequence; and the second sequence may be based on a second cyclic shift of a second base pseudo-random sequence.
  • the method may further include determining, based on a first resource contention procedure, that the first RB set is available for use by the wireless communication device; determining, based on a second resource contention procedure, that the second RB set is not available for use by the wireless communication device; wherein, as result of determining that the first RB set is available for use and determining that the second RB set is not available for use, the sending of the uplink control information may include sending the uplink control information via the first RB set.
  • the method may further include determining, based on a first resource contention procedure, that the first RB set is available for use by the wireless communication device; determining, based on a second resource contention procedure, that the second RB set is available for use by the wireless communication device; wherein, as result of determining that the first RB set is available for use and determining that the second RB set is available for use, the sending of the uplink control information may include sending the uplink control information via the first RB set and the second RB set.
  • the method may further include determining, based on a first resource contention procedure, that the first RB set is available for use by the wireless communication device; determining, based on a second resource contention procedure, that the second RB set is available for use by the wireless communication device; wherein, as result of determining that the first RB set is available for use and determining that the second RB set is available for use, the sending of the uplink control information may include sending the uplink control information via a physical resource block (PRB) interlace including the first RB set, the second RB set, and at least one RB between the first RB set and the second RB set.
  • PRB physical resource block
  • FIG. 11 is a conceptual diagram illustrating an example of a hardware implementation for base station (BS) 1100 employing a processing system 1114.
  • BS base station
  • an element, or any portion of an element, or any combination of elements may be implemented with a processing system 1114 that includes one or more processors 1104.
  • the BS 1100 may correspond to one or more of the scheduling entity 108 (e.g., a gNB, a transmit receive point, a UE, etc. ) of FIG. 1 and/or the base station 210, 212, 214, or 218 of FIG. 2.
  • the scheduling entity 108 e.g., a gNB, a transmit receive point, a UE, etc.
  • the processing system 1114 may be substantially the same as the processing system 914 illustrated in FIG. 9, including a bus interface 1108, a bus 1102, memory 1105, a processor 1104, and a computer-readable medium 1106.
  • the BS 1100 may include an interface 1130 (e.g., a network interface) that provides a means for communicating with various other apparatus within a core network and with at least one radio access network.
  • the processor 1104, as utilized in BS 1100, may be used to implement any one or more of the processes described below.
  • the BS 1100 may be configured to perform any one or more of the operations described below in conjunction with FIG. 12.
  • the processor 1104 may include communication and processing circuitry 1141.
  • the communication and processing circuitry 1141 may include one or more hardware components that provide the physical structure that performs various processes related to communication (e.g., signal reception and/or signal transmission) as described herein.
  • the communication and processing circuitry 1141 may further include one or more hardware components that provide the physical structure that performs various processes related to signal processing (e.g., processing a received signal and/or processing a signal for transmission) as described herein.
  • the communication and processing circuitry 1141 may further be configured to execute communication and processing software 1151 included on the computer-readable medium 906 to implement one or more functions described herein.
  • the communication and processing circuitry 1141 may obtain information from a component of the BS 1100 (e.g., from the transceiver 1110 that receives the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium) , process (e.g., decode) the information, and output the processed information. For example, the communication and processing circuitry 1141 may output the information to another component of the processor 1104, to the memory 1105, or to the bus interface 1108. In some examples, the communication and processing circuitry 1141 may receive one or more of signals, messages, other information, or any combination thereof. In some examples, the communication and processing circuitry 1141 may receive information via one or more channels. In some examples, the communication and processing circuitry 1141 may include functionality for a means for receiving.
  • the communication and processing circuitry 1141 may obtain information (e.g., from another component of the processor 1104, the memory 1105, or the bus interface 1108) , process (e.g., encode) the information, and output the processed information.
  • the communication and processing circuitry 1141 may output the information to the transceiver 1110 (e.g., that transmits the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium) .
  • the communication and processing circuitry 1141 may send one or more of signals, messages, other information, or any combination thereof.
  • the communication and processing circuitry 1141 may send information via one or more channels.
  • the communication and processing circuitry 1141 may include functionality for a means for sending (e.g., means for transmitting) .
  • the processor 1104 may include resource allocation circuitry 1142 configured to perform resource allocation-related operations as discussed herein (e.g., scheduling candidate RBs sets for an uplink transmission) .
  • the resource allocation circuitry 1142 may include functionality for a means for generating an indication of a plurality of RB sets available for an uplink control transmission.
  • the resource allocation circuitry 1142 may further be configured to execute resource allocation software 1152 included on the computer-readable medium 1106 to implement one or more functions described herein.
  • the processor 1104 may include waveform processing circuitry 1143 configured to perform waveform processing-related operations as discussed herein (e.g., decoding received uplink signals) .
  • the waveform processing circuitry 1143 may include functionality for a means for receiving information based on cyclic shift ramping.
  • the waveform processing circuitry 1143 may further be configured to execute waveform processing software 1153 included on the computer-readable medium 1106 to implement one or more functions described herein.
  • FIG. 12 is a flow chart illustrating another example process 1200 for a wireless communication system in accordance with some aspects of the present disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments.
  • the process 1200 may be carried out by the BS 1100 illustrated in FIG. 11. In some examples, the process 1200 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • a BS may generate an indication of a plurality of resource block (RB) sets available for an uplink control transmission on a shared radio frequency spectrum.
  • the resource allocation circuitry 1142 shown and described above in connection with FIG. 11, may schedule candidate RB sets for a PUCCH transmission by a wireless communication device.
  • the shared radio frequency spectrum may include an unlicensed radio frequency spectrum.
  • the plurality of RB sets may include a plurality of contiguous RB sets.
  • the BS may send the indication to a wireless communication device.
  • the communication and processing circuitry 1141 and transceiver 1110 shown and described above in connection with FIG. 11, may send a grant to a UE.
  • the BS may receive uplink control information from the wireless communication device via at least one RB set of the plurality of RB sets.
  • the waveform processing circuitry 1143 in cooperation with the communication and processing circuitry 1141 and transceiver 1110, shown and described above in connection with FIG. 11, may monitor one or more RB sets (e.g., according to uplink scheduling) for PUCCH signals and then decode any received PUCCH signals.
  • the at least one RB set may include at least two RB sets. In some aspects, the at least one RB set may include a first RB set and a second RB set.
  • the uplink control information may be received on a physical uplink control channel (PUCCH) . In some aspects, receiving the uplink control information may include monitoring each of the plurality of RB sets for a transmission by the wireless communication device.
  • PUCCH physical uplink control channel
  • receiving the uplink control information may include receiving the uplink control information based on a cyclic shift ramping for different RBs of the at least one RB set; wherein the cyclic shift ramping may be based on a combination of a first cyclic shift ramping and a second cyclic shift ramping; and wherein the second cyclic shift ramping may be different from the first cyclic shift ramping.
  • the first cyclic shift ramping may be based on a cyclic shift equation that may include a first cyclic shift ramping value that may be based on interlace resource block (IRB) indices within a PRB interlace; and the second cyclic shift ramping may be based on the cyclic shift equation that may include a second cyclic shift ramping value that may be based on an RB set index.
  • a sum of the first cyclic shift ramping value and the second cyclic shift ramping value for a particular RB set of the at least one RB set may be coprime with a length of resource elements in an RB of the at least one RB set.
  • receiving the uplink control information may include receiving first information for the first RB set based on a first sequence; and receiving second information for the second RB set based on a second sequence, wherein the second sequence may be different from the first sequence.
  • the first sequence may be based on a first cyclic shift of a first base pseudo-random sequence; and the second sequence may be based on a second cyclic shift of a second base pseudo-random sequence.
  • receiving the uplink control information may include receiving the uplink control information via the first RB set. In some aspects, receiving the uplink control information may include receiving the uplink control information via the first RB set and the second RB set. In some aspects, receiving the uplink control information may include receiving the uplink control information via a physical resource block (PRB) interlace including the first RB set, the second RB set, and at least one RB between the first RB set and the second RB set.
  • PRB physical resource block
  • the method may further include, if the uplink control information includes more than two bits, scheduling the first RB set and the second RB set on a single physical resource block (PRB) interlace.
  • PRB physical resource block
  • 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 CDMA2000 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 -12 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, 2, 9, and 11 may be configured to perform one or more of the methods, features, or steps escribed 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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  • Engineering & Computer Science (AREA)
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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention se rapporte à la sélection de la largeur de bande pour la communication d'informations de commande de liaison montante. Un dispositif de communication sans fil peut utiliser un ou plusieurs ensembles de blocs de ressources (RB) pour émettre des informations de commande de liaison montante sur un spectre de radiofréquence (RF) partagé tel qu'une bande sans licence. Dans certains exemples, la puissance d'émission maximale pour le dispositif de communication sans fil peut être limitée (par exemple par la réglementation). Ainsi, le dispositif de communication sans fil peut, dans certaines circonstances (par exemple lorsque le dispositif de communication sans fil se situe au niveau ou à proximité d'une limite de cellule), émettre les informations de commande de liaison montante par l'intermédiaire de multiples ensembles RB plutôt que d'un seul ensemble RB en cas de tentative de coupure d'une liaison avec une station de base. À cette fin, la station de base peut programmer de multiples ensembles RB pour une transmission en liaison montante par le dispositif de communication sans fil et surveiller chacun de ces ensembles RB pour obtenir des informations de commande de liaison montante.
PCT/CN2020/083701 2020-04-08 2020-04-08 Sélection de largeur de bande pour la communication d'informations de commande de liaison montante WO2021203280A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108271262A (zh) * 2017-01-03 2018-07-10 北京三星通信技术研究有限公司 分配上行控制信道的方法及设备
US20190230685A1 (en) * 2017-01-08 2019-07-25 Lg Electronics Inc. Method and device for transmitting and receiving uplink signal between user equipment and base station in wireless communication system
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CN108271262A (zh) * 2017-01-03 2018-07-10 北京三星通信技术研究有限公司 分配上行控制信道的方法及设备
US20190230685A1 (en) * 2017-01-08 2019-07-25 Lg Electronics Inc. Method and device for transmitting and receiving uplink signal between user equipment and base station in wireless communication system
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