WO2021253282A1 - Sauts de fréquence alignés - Google Patents

Sauts de fréquence alignés Download PDF

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Publication number
WO2021253282A1
WO2021253282A1 PCT/CN2020/096570 CN2020096570W WO2021253282A1 WO 2021253282 A1 WO2021253282 A1 WO 2021253282A1 CN 2020096570 W CN2020096570 W CN 2020096570W WO 2021253282 A1 WO2021253282 A1 WO 2021253282A1
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Prior art keywords
frequency hopping
hopping pattern
frequency
control information
downlink control
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PCT/CN2020/096570
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English (en)
Inventor
Fang Yuan
Mostafa KHOSHNEVISAN
Wooseok Nam
Tao Luo
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Qualcomm Incorporated
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Priority to PCT/CN2020/096570 priority Critical patent/WO2021253282A1/fr
Publication of WO2021253282A1 publication Critical patent/WO2021253282A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7143—Arrangements for generation of hop patterns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • 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
    • H04L5/0012—Hopping in multicarrier systems
    • 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
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • H04B2001/7154—Interference-related aspects with means for preventing interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • 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
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the following relates generally to wireless communications and more specifically to aligned frequency hopping.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (for example, time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-APro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-APro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • DFT-S-OFDM discrete Fourier transform spread orthogonal frequency division multiplexing
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • Some communication devices may support multiple antennas to provide transmit diversity and receive diversity. These antennas may be located within one or more antenna arrays or antenna panels.
  • Some communication devices may also support frequency hopping operations over multiple radio frequency spectrum bands to provide frequency diversity for wireless communications, for example, for uplink communications. These communication devices may, however, experience interference between antenna arrays or antenna panels due to the frequency hopping operations.
  • Various aspects of the described techniques relate to configuring a wireless communication device, which may be otherwise known as user equipment (UE) , to support frequency hopping pattern alignment, such as for fifth generation (5G) new radio (NR) systems.
  • Frequency hopping may include using different frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, symbols, minislots, slots, subframes, or frames) .
  • the described techniques may include configuring the UE to determine a frequency hopping pattern for each scheduled uplink data channel, for example, each scheduled PUSCH.
  • at least two frequency hopping patterns for at least two respective scheduled uplink data channels may occupy some same frequency resources (for example, carriers or subcarriers) over a time resource (for example, a slot) .
  • one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain.
  • the overlap may cause interference at the UE.
  • the UE may align each frequency hopping pattern of each scheduled uplink data channel. For example, the UE may align one or more frequency hops of each frequency hopping pattern of each scheduled uplink data channel to prevent overlap between two or more frequency hops.
  • the described techniques may, as a result, include features for improvements to UE operations and, in some examples, may promote high reliability and low latency uplink transmissions, among other benefits.
  • the method includes receiving a set of DCI messages each scheduling a data channel, where a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH, determining, based at least in part on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, aligning the first frequency hopping pattern with the second frequency hopping pattern, and transmitting the first PUSCH and the second PUSCH based at least in part on the aligning.
  • the apparatus includes a processor, memory coupled with the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to receive a set of DCI messages each scheduling a data channel, where a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH, determine, based at least in part on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, align the first frequency hopping pattern with the second frequency hopping pattern, and transmit the first PUSCH and the second PUSCH based at least in part on the aligning.
  • the method includes scheduling a first PUSCH and a second PUSCH, assigning a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, transmitting a set of DCI messages, where a first DSCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH, and receiving the first PUSCH and the second PUSCH based at least in part on the first frequency hopping pattern and the second frequency hopping pattern.
  • the apparatus includes a processor, memory coupled with the processor, and instructions stored in the memory and executable by the processor to cause the apparatus to schedule a first PUSCH and a second PUSCH, assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, transmit a set of DCI messages, where a first DSCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH, and receive the first PUSCH and the second PUSCH based at least in part on the first frequency hopping pattern and the second frequency hopping pattern.
  • Figures 1 and 2 illustrate examples of wireless communications systems that support aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figure 3 illustrates an example of frequency hopping patterns that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figure 4 illustrates an example of a process flow that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figures 5 and 6 show block diagrams of devices that support aligned frequency hopping in accordance with aspects of the present disclosure.
  • FIG. 7 shows a block diagram of a user equipment (UE) communications manager that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • UE user equipment
  • Figure 8 shows a diagram of a system including a device that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figures 9 and 10 show block diagrams of devices that support aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figure 11 shows a block diagram of a base station communications manager that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figure 12 shows a diagram of a system including a device that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • Figures 13–15 show flowcharts illustrating methods that support aligned frequency hopping in accordance with aspects of the present disclosure.
  • Some wireless communication systems may include communication devices, such as user equipments (UEs) and base stations, for example, next-generation NodeBs or giga-NodeBs (either of which may be referred to as a gNB) that may support multiple radio access technologies including fifth generation (5G) systems, which may be referred to as New Radio (NR) systems, among others.
  • UEs user equipments
  • gNB giga-NodeB
  • 5G fifth generation
  • NR New Radio
  • the communication devices may be configured with multiple antennas to provide transmit diversity and receive diversity.
  • the antennas may be positioned within one or more antenna arrays or antenna panels.
  • the communication devices may support frequency hopping operations over multiple radio frequency spectrum bands to provide frequency diversity for the high levels of uplink data traffic.
  • the communication devices may experience interference between the antenna arrays or the antenna panels due to the frequency hopping operations.
  • frequency hopping may include using different frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, symbols, minislots, slots, subframes, or frames) .
  • at least two frequency hopping patterns for at least two respective scheduled uplink data channels, such as PUSCH may occupy the same frequency resources (for example, carriers or subcarriers) over a time resource (for example, a slot) . That is, one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain. The overlap may cause interference between the antenna arrays or the antenna panels.
  • the communication devices may be configured to determine a frequency hopping pattern for each scheduled uplink data channel, for example, each scheduled PUSCH.
  • at least two frequency hopping patterns for at least two respective scheduled uplink data channels may occupy some same frequency resources (for example, carriers or subcarriers) over a time resource (for example, a slot) . That is, one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain.
  • the communication devices may align each frequency hopping pattern for each scheduled uplink data channel. For example, the communication devices may align one or more frequency hops of each frequency hopping pattern of each scheduled uplink data channel to prevent overlap of frequency resources associated with two or more frequency hops. In some examples, the communication devices may align each frequency hopping pattern for each scheduled uplink data channel based on a frequency resource offset between frequency hops of each frequency hopping pattern. In various examples, the communication devices may align each frequency hopping pattern for each scheduled uplink data channel based on a beginning symbol of a second frequency hop of each frequency hopping pattern.
  • the techniques employed by the described communication devices may provide benefits and enhancements to the operation of the communication devices.
  • operations performed by the described communication devices may provide improvements to channel estimation procedures by reducing or eliminating interference between multiple scheduled uplink data channels (for example, multiple PUSCH) .
  • the operations performed by the described communication devices to reduce or eliminate the interference include aligning frequency hopping patterns of each scheduled uplink data channel thereby preventing overlap between the frequency resources associated with the different frequency hops.
  • operations performed by the described communication devices may also support improvements to power consumption, reliability for uplink communications, spectral efficiency, higher data rates and, in some examples, low latency for uplink communications, among other benefits
  • aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to aligned frequency hopping.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (for example, mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable for example, mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in Figure 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (for example, core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in Figure 1.
  • network equipment for example, core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (for example, via an S1, N2, N3, or other interface) .
  • the base stations 105 may communicate with one another over the backhaul links 120 (for example, via an X2, Xn, or other interface) either directly (for example, directly between base stations 105) , or indirectly (for example, via core network 130) , or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in Figure 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (for example, a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (for example, LTE, LTE-A, LTE-APro, NR) .
  • Each physical layer channel may carry acquisition signaling (for example, synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (for example, an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) and may be positioned according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (for example, of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115.
  • Carriers may carry downlink or uplink communications (for example, in an FDD mode) or may be configured to carry downlink and uplink communications (for example, in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (for example, 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (for example, a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (for example, using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (for example, a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (for example, the order of the modulation scheme, the coding rate of the modulation scheme, or both) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (for example, spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (for example, 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (for example, ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (for example, in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (for example, depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (for example, N f ) sampling periods.
  • the duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (for example, in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration (for example, the number of symbol periods in a TTI) may be variable.
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (for example, in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region for example, a control resource set (CORESET)
  • CORESET control resource set
  • a control region for example, a control resource set (CORESET) for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (for example, CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (for example, control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (for example, over a carrier) and may be associated with an identifier for distinguishing neighboring cells (for example, a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (for example, a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (for example, a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas 110, among other examples.
  • a macro cell covers a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (for example, licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (for example, the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • CSG closed subscriber group
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (for example, MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • MTC mobile transmission control
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (for example, via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (for example, a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (for example, according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (for example, set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (for example, set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (for example, mission critical functions) .
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT) , mission critical video (MCVideo) , or mission critical data (MCData) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (for example, using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications.
  • D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (for example, UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (for example, base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (for example, a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (for example, a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (for example, radio heads and ANCs) or consolidated into a single network device (for example, a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (for example, less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (for example, from 30 GHz to 300 GHz) , also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (for example, LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • the base stations 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers.
  • Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (for example, the same codeword) or different data streams (for example, different codewords) .
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) , where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (for example, a base station 105, a UE 115) to shape or steer an antenna beam (for example, a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (for example, with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 or a UE 115 may use beam sweeping techniques as part of beam forming operations.
  • a base station 105 may use multiple antennas or antenna arrays (for example, antenna panels) to conduct beamforming operations for directional communications with a UE 115.
  • Some signals (for example, synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station 105 multiple times in different directions.
  • the base station 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (for example, by a transmitting device, such as a base station 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the base station 105.
  • Some signals may be transmitted by a base station 105 in a single beam direction (for example, a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (for example, from a base station 105 to a UE 115) .
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands.
  • the base station 105 may transmit a reference signal (for example, a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded.
  • a reference signal for example, a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (for example, a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) .
  • PMI precoding matrix indicator
  • codebook-based feedback for example, a multi-panel type codebook, a linear combination type codebook, a port selection type codebook
  • these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (for example, for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (for example, for transmitting data to a receiving device) .
  • a receiving device may try multiple receive configurations (for example, directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (for example, different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • a receiving device may use a single receive configuration to receive along a single beam direction (for example, when receiving a data signal) .
  • the single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (for example, a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • SNR signal-to-noise ratio
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (for example, using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (for example, automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (for example, low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the UEs 115 may support a frequency hopping pattern using different frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, symbols, minislots, slots, subframes, or a frame) .
  • the UEs 115 may support aligning two or more frequency hops of a frequency hopping pattern to decrease or mitigate interference.
  • the UEs 115 may determine a frequency hopping pattern for each scheduled uplink data channel, for example, each scheduled PUSCH.
  • At least two frequency hopping patterns for at least two respective scheduled uplink data channels may occupy some same frequency resources (for example, carriers or subcarriers) over a time resource (for example, a slot) .
  • one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain. The overlap may cause interference at the UEs 115.
  • the UEs 115 may align each frequency hopping pattern for each scheduled uplink data channel. For example, the UEs 115 may align one or more frequency hops of each frequency hopping pattern for each scheduled uplink data channel to prevent overlap between the frequency resources associated with two or more frequency hops. The UEs 115 may thus experience high reliability and low latency uplink transmissions.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the wireless communications system 200 may implement aspects of the wireless communications system 100.
  • the wireless communications system 200 may include a base station 105-a and a UE 115-a within a geographic coverage area 110-a.
  • the base station 105-a and the UE 115-a may be examples of a base station 105 and a UE 115 as described with reference to Figure 1.
  • the wireless communications system 200 may support multiple radio access technologies including 4G systems such as LTE systems, LTE-A systems, or LTE-APro systems, and 5G systems which may be referred to as NR systems.
  • 4G systems such as LTE systems, LTE-A systems, or LTE-APro systems
  • 5G systems which may be referred to as NR systems.
  • the base station 105-a and the UE 115-a may be configured with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of the base station 105-a and the UE 115-a may be located within one or more respective antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • the base station 105-a antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with the base station 105-a may be located in diverse geographic locations.
  • the base station 105-a may have an antenna array with a number of rows and columns of antenna ports that the base station 105-a may use to support beamforming of communications with the UE 115-a.
  • the UE 115-a may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via one or more antenna ports.
  • the base station 105-a and the UE 115-a may thus be configured to support directional communications (for example, beamformed communications) using the multiple antennas.
  • the base station 105-a and the UE 115-a may communicate via the directional communications using multiple component carriers.
  • the base station 105-a and the UE 115-a may be configured to support multiple downlink component carriers and multiple uplink component carriers.
  • the base station 105-a and the UE 115-a may be configured to support the directional communications over a carrier bandwidth or may be configured to support the directional communications over one of multiple carrier bandwidths.
  • the base station 105-a may allocate time and frequency resources for one or multiple data channels including downlink data channels (for example, PDSCH) and uplink data channels (for example, PUSCH) .
  • the UE 115-a may support directional communications using one or more directional uplink beams 210 (also referred to as transmit beams) .
  • the base station 105-a may schedule multiple uplink data channels. For example, the base station 105-a may schedule at least two uplink data channels, such as a first PUSCH and a second PUSCH.
  • the base station 105-a may, in some examples, assign a frequency hopping pattern to improve an uplink performance for the UE 115-a by providing frequency diversity (for example, shifting frequency resource allocation over one or more time resources) .
  • the application of a frequency hopping pattern to an uplink data channel includes switching at least some frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, symbols, minislots, slots, subframes, or a frame) within the uplink data channel.
  • the base station 105-a may assign a frequency hopping pattern for each scheduled uplink data channel of the multiple scheduled uplink data channels. For example, the base station 105-a may assign at least two frequency hopping patterns, such as a first frequency hopping pattern associated with a first PUSCH and a second frequency hopping pattern associated with a second PUSCH. In some aspects, the first frequency hopping pattern is assigned by the first DCI message scheduling the first PUSCH, and the second frequency hopping pattern is assigned by the second DCI message scheduling the second PUSCH. The first frequency hopping pattern and the second frequency hopping pattern may improve an uplink performance for the UE 115-a by providing frequency diversity.
  • the UE 115-a may transmit the first PUSCH via a first directional uplink beam 210-ausing a first antenna and according to the first frequency hopping pattern. Likewise, the UE 115-a may also transmit the second PUSCH via a second directional uplink beam 210-b using a second antenna and according to the second frequency hopping pattern.
  • the assigned frequency hopping patterns may be intra-slot frequency hopping patterns (for example, associated with a shift in frequency resource allocations within a slot) .
  • the assigned frequency hopping patterns may be inter-slot frequency hopping patterns (for example, associated with a shift in frequency resource allocations between adjacent slots, such as between a present slot and a subsequent slot) .
  • the base station 105-a may transmit, to the UE 115-a, multiple DCI messages scheduling the multiple uplink data channels.
  • the UE 115-a may receive multiple DCI messages each scheduling a respective uplink data channel.
  • the base station 105-a may transmit, and the UE 115-a may receive, at least two DCI message including a first DCI message scheduling the first PUSCH and a second DCI message scheduling the second PUSCH.
  • the first DCI message scheduling the first PUSCH and the second DCI message scheduling the second PUSCH may be associated with CORESET of different CORESET pool indexes.
  • the UE 115-a may determine a frequency hopping pattern for each scheduled uplink data channel based on the respective DCI message.
  • the UE 115-a may determine the first frequency hopping pattern for the first scheduled PUSCH and the second frequency hopping pattern for the second scheduled PUSCH based on the first and second DCI messages, respectively.
  • At least two frequency hopping patterns for at least two respective scheduled uplink data channels may use same frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, slots) . That is, one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain. The overlap may cause interference at the UE 115-a. For example, during a given hop of the first frequency hopping pattern associated with the first PUSCH and a given hop of the second frequency hopping pattern associated with the second PUSCH.
  • the UE 115-a may simultaneously transmit the first PUSCH on a frequency carrier via the first directional uplink beam 210-ausing a first antenna and transmit the second PUSCH on the same frequency carrier via the second directional uplink beam 210-ausing a second antenna. Because the UE 115-ais simultaneously transmitting the first PUSCH and the second PUSCH on the same frequency carrier during a given hop, the first antenna may experience interference from the second antenna due to the second PUSCH transmission. Likewise, the second antenna may experience interference from the first antenna due to the first PUSCH transmission.
  • the UE 115-a may align each frequency hopping pattern of each scheduled uplink data channel to reduce or mitigate the interference between the multiple scheduled uplink data channels and improve reliability of uplink transmission. For example, the UE 115-a may align one or more frequency hops of each frequency hopping pattern for each scheduled uplink data channel to prevent overlap of the frequency resources associated with concurrent frequency hops associated with the different uplink data channels. In some examples, the UE 115-a may align the frequency hopping patterns for the scheduled uplink data channels based on a frequency resource offset between frequency hops of the frequency hopping patterns.
  • the UE 115-a may determine a frequency resource offset between at least two frequency hops of a frequency hopping pattern based on a parameter (for example, a DCI field in a DCI message or an RRC parameter in an RRC configuration message) .
  • the UE 115-a may align a frequency hop of each scheduled uplink data channel based on a beginning symbol of the frequency hop.
  • the UE 115-a may thereby align a first frequency hop of each frequency hopping pattern with a second frequency hop of each frequency hopping pattern based on the beginning symbol of the second frequency hop.
  • the UE 115-a may, in some examples, determine a starting resource block (RB) in each frequency hop of a frequency hopping pattern according to Equation (1) below.
  • the UE 115-a may determine the starting RB based on receiving resource block assignment information, from the base station 105-a, for example, in an RRC configuration message or a DCI message. For intra-slot frequency hopping, the UE 115-a may determine a number of symbols in a first frequency hop according to Equation (2) below.
  • the UE 115-a may determine a number of symbols in a second frequency hop according to Equation (3) below.
  • the UE 115-a may determine a starting RB in each frequency hop of a frequency hopping pattern according to Equation (4) below.
  • the UE 115-a may also experience improvements to channel estimation operations as a result of aligning frequency hopping patterns.
  • the UE 115-a may transmit, to the base station 105-a, uplink reference signals on multiple uplink channels using multiple antennas.
  • the uplink reference signals may be used by the base station 105-a and the UE 115-a to determine characteristics of an uplink channel.
  • the UE 115-a may increase a reliability or efficiency of the channel estimation operations (for example, uplink reference signal transmissions) by mitigating interference between the multiple antennas by aligning corresponding frequency hopping patterns associated with each uplink channel.
  • the characteristics of the uplink channel may also be referred to as a channel estimate or channel conditions or channel metrics.
  • Uplink reference signals may include uplink demodulation reference signals (DMRS) , uplink sounding reference signals (SRS) , tracking reference signals (TRS) , and phase tracking reference signals (PTRS) , among others.
  • DMRS uplink demodulation reference signals
  • SRS
  • An uplink DMRS may be used by the base station 105-a to determine a channel estimate for an uplink channel between the base station 105-a and the UE 115-a (for example, so the base station 105-a can perform coherent demodulation of a physical uplink control channel (PUCCH) and a PUSCH) .
  • Each scheduled PUCCH and PUSCH may have its own DMRS, which may assist the base station 105-a with demodulation and decoding.
  • the uplink SRS may be used by the base station 105-a for uplink link adaption, uplink transmission parameter selection, and uplink measurements, among other uses.
  • an uplink SRS may be used by the base station 105-a to determine the uplink channel quality over a wide bandwidth so that the base station 105-a can perform frequency-selective scheduling for the UE 115-a.
  • the wireless communications system 200 may therefore configure the UE 115-a to support aligning frequency hopping patterns to improve uplink communications.
  • the UE 115-a may, as a result, support one or more features for improvements to power consumption, reliability for uplink communications, spectral efficiency, higher data rates and, in some examples, may promote low latency for channel estimation operations, among other benefits.
  • FIG 3 illustrates an example of frequency hopping patterns 300 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the frequency hopping patterns 300 may be based on a configuration by a base station 105, and implemented by a UE 115, as described with reference to Figures 1 and 2, respectively.
  • the frequency hopping patterns 300 may achieve higher reliability and lower latency uplink communications by aligning frequency hopping patterns associated with various uplink data channels (for example, PUSCH) .
  • the frequency hopping patterns 300 may also be based on a configuration by the base station 105, and implemented by the UE 115 to decrease power consumption by the UE 115, if performing channel estimation operations, among other benefits.
  • the frequency hopping patterns 300 may be inter-slot frequency hopping patterns or intra-slot frequency hopping patterns.
  • a UE 115 may be scheduled by at least two DCI messages, each scheduling an uplink data channel. For example, the UE 115 may receive one DCI message scheduling a PUSCH 305 and another DCI message scheduling a PUSCH 310. The UE 115 may determine a first frequency hopping pattern associated with the scheduled PUSCH 305 and a second frequency hopping pattern associated with the scheduled PUSCH 310. In the example of Figure 3, the UE 115 may align frequency hops associated with a frequency hopping pattern of each scheduled PUSCH to remove an interference between the multiple scheduled PUSCH.
  • the UE 115 may align a first frequency hop 320 with a second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both, to prevent overlap between the first frequency hop 320 and the second frequency hop 325.
  • the UE 115 may align frequency hops associated with a frequency hopping pattern of each scheduled PUSCH based on an offset between frequency hops of each frequency hopping pattern.
  • the UE 115 may determine an offset between frequency hops of each frequency hopping pattern based on a parameter, for example, a DCI field in a DCI message or an RRC parameter in an RRC configuration message.
  • the UE 115 may determine an offset 330 between the first frequency hop 320 and the second frequency hop 325 associated with the scheduled PUSCH 305. Additionally or alternatively, the UE 115 may determine an offset 335 between the first frequency hop 320 and the second frequency hop 325 associated with the scheduled PUSCH 310.
  • One or more of the offset 330 and the offset 335 may be a resource offset in a time domain, or a frequency domain, or both.
  • the second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310 may be offset by a number of time and frequency resources (for example, RBs) relative to the first frequency hop 320.
  • the UE 115 may receive a first DCI message scheduling the PUSCH 305 and indicating an offset 330 for RB offset of the PUSCH 305 and a second DCI message scheduling the PUSCH 310 and indicating an offset 335 for RB offset of the PUSCH 310, where the offset 330 and the offset 335 are identical.
  • the UE 115 may align a first frequency hop of each scheduled PUSCH based on a beginning symbol of a second frequency hop. For example, the UE 115 may determine a beginning symbol 340 of the second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both, and align the first frequency hop 320 and the second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both, based on the beginning symbol 340 of the second frequency hop 325. In some other examples, the UE 115 may align a first frequency hop of each scheduled PUSCH based on an ending symbol of the first frequency hop and a beginning symbol of the second frequency hop.
  • the UE 115 may determine a beginning symbol 340 of the second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both, and an ending symbol 315 of the first frequency hop 320 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both.
  • the UE 115 may align the first frequency hop 320 and the second frequency hop 325 associated with the scheduled PUSCH 305 or the scheduled PUSCH 310, or both, based on the beginning symbol 340 of the second frequency hop 325 and the ending symbol of the first frequency hop 315.
  • the UE 115 may receive the first DCI message scheduling the PUSCH 305 with a first and a second frequency hop and the second DCI message scheduling the PUSCH 310 with a first and a second frequency hop.
  • the beginning symbol of the second frequency hop of the PUSCH 305 and the beginning symbol of the second frequency hop of the PUSCH 310 are identical.
  • the first DCI message can indicate a starting symbol S0 and a length of the PUSCH 305 and the second DCI message can indicate a starting symbol S1 and a length of the PUSCH 310, such that under frequency hopping, the beginning symbol of the second frequency hop of the PUSCH 305 and the beginning symbol of the second frequency hop of the PUSCH 310 are identical.
  • the beginning symbol of the second frequency hop of the PUSCH 305 and the beginning symbol of the second frequency hop of the PUSCH 310 are identical.
  • the UE 115 may thereby support aligning frequency hopping patterns, and more specifically frequency hops associated with the frequency hopping patterns to improve uplink communications.
  • the UE 115 may, as a result, support one or more features for improvements to power consumption, reliability for uplink communications, spectral efficiency, higher data rates and, in some examples, may promote low latency for channel estimation operations, among other benefits.
  • FIG 4 illustrates an example of a process flow 400 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the process flow 400 may implement aspects of the wireless communications system 100 and 200 described with reference to Figures 1 and 2, respectively.
  • the process flow 400 may be based on a configuration by a base station 105-b, and implemented by a UE 115-b.
  • the process flow 400 may achieve higher reliability and lower latency channel estimation operations by aligning frequency hopping patterns associated with various uplink data channels (for example, PUSCH) .
  • the process flow 400 may also be based on a configuration by the base station 105-b, and implemented by the UE 115-b to decrease power consumption by the UE 115-b if performing channel estimation operations, among other benefits.
  • the base station 105-b and the UE 115-b may be examples of a base station 105 and a UE 115, as described with reference to Figures 1 and 2.
  • the base station 105-b may schedule multiple uplink data channels. For example, the base station 105-b may schedule at least two uplink data channels, such as a first PUSCH and a second PUSCH.
  • the base station 105-b may, in some examples, assign a frequency hopping pattern to improve an uplink performance for the UE 115-b by providing frequency diversity (for example, shifting frequency resource allocation over one or more time resources) .
  • a frequency hopping pattern may include changing frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, symbols, minislots, slots, subframes, or a frame) .
  • a frequency hop may include switching from one frequency resource (for example, carrier or subcarrier) to another frequency resource over a same or different time resource (for example, slot) .
  • the base station 105-b may assign a frequency hopping pattern for each respective scheduled uplink data channel of the multiple scheduled uplink data channels.
  • the base station 105-b may assign at least two frequency hopping patterns, such as a first frequency hopping pattern associated with a first PUSCH and a second frequency hopping pattern associated with a second PUSCH.
  • the first frequency hopping pattern and the second frequency hopping pattern may thereby improve an uplink performance for the UE 115-b by providing frequency diversity (for example, shifting frequency resource allocation for the multiple scheduled uplink data channels over one or more time resources) .
  • the assigned frequency hopping patterns may be intra-slot frequency hopping patterns (for example, shifting frequency resource allocations within a slot) .
  • the assigned frequency hopping patterns may be inter-slot frequency hopping patterns (for example, shifting frequency resource allocations over multiple slots, such as a present slot and a subsequent slot) .
  • the base station 105-b may transmit multiple DCI messages scheduling the multiple uplink data channels to the UE 115-b.
  • the UE 115-b may receive multiple DCI messages each scheduling an uplink data channel.
  • the base station 105-b may transmit, and the UE 115-b may receive, at least two DCI message including a first DCI message scheduling a first PUSCH and a second DCI message scheduling a second PUSCH.
  • the UE 115-b may determine a frequency hopping pattern of each scheduled uplink data channel.
  • the UE 115-b may determine a first frequency hopping pattern of a first scheduled PUSCH and a second frequency hopping pattern of a second scheduled PUSCH.
  • At least two frequency hopping patterns for at least two respective scheduled uplink data channels may occupy same frequency resources (for example, carriers or subcarriers) over one or more time resources (for example, slots) . That is, one or more frequency resources of the at least two frequency hopping patterns may overlap in a frequency domain. The overlap may cause interference at the UE 115-b.
  • the UE 115-b may simultaneously transmit the first PUSCH on a frequency carrier using an antenna of a first antenna panel and the second PUSCH on the same frequency carrier using an antenna of a second antenna panel.
  • the first antenna panel may experience interference from the second antenna panel due to the second PUSCH transmission.
  • the second antenna panel may experience interference from the first antenna panel due to the first PUSCH transmission.
  • the UE 115-b may align frequency hops of each frequency hopping pattern of each respective scheduled uplink data channel. For example, the UE 115-b may align one or more frequency hops of each frequency hopping pattern to prevent overlap between two or more frequency hops. In some examples, the UE 115-b may align each frequency hopping pattern of each scheduled uplink data channel based on a frequency resource offset between frequency hops of each frequency hopping pattern. In some other examples, the UE 115-b may align each frequency hopping pattern of each scheduled uplink data channel based on a beginning symbol of a second frequency hop of each frequency hopping pattern.
  • the UE 115-b may thereby align a first frequency hop of each frequency hopping pattern with a second frequency hop of each frequency hopping pattern based on the beginning symbol of the second frequency hop.
  • the UE 115-b may transmit the multiple scheduled uplink data channels, for example, multiple PUSCH according to the aligned frequency hopping patterns.
  • the process flow 400 may thus enable the UE 115-b to align multiple frequency hopping patterns associated with multiple uplink data channels (for example, PUSCH) .
  • the alignment of the multiple frequency hopping patterns may enable interference mitigation for the UE 115-b, if one or more time or frequency resource associated with one scheduled uplink data channel are overlapping with one or more time or frequency resources associated with another scheduled uplink data channel.
  • one or more processors of the UE 115-b for example, processor (s) controlling or incorporated with a UE communications manager
  • Figure 5 shows a block diagram of a device 505 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 505 may be an example of aspects of a UE 115.
  • the device 505 may include a receiver 510, a UE communications manager 515, and a transmitter 520.
  • the device 505 can be implemented, at least in part, by one or both of a modem and a processor. Each of these components may be in communication with one another (for example, via one or more buses) .
  • the receiver 510 may receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to aligned frequency hopping) . Information may be passed on to other components of the device 505.
  • the receiver 510 may be an example of aspects of the transceiver 820 described with reference to Figure 8.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • the UE communications manager 515 may receive a set of DCI messages each scheduling a data channel, in which a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the UE communications manager 515 may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, and align the first frequency hopping pattern with the second frequency hopping pattern.
  • the UE communications manager 515 may transmit the first PUSCH and the second PUSCH based on the aligning.
  • the UE communications manager 515 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 510 and the transmitter 520 may be implemented as analog components (for example, amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception.
  • the UE communications manager 515 may be implemented to realize one or more potential improvements. At least one implementation may enable the UE communications manager 515 to align multiple frequency hopping patterns associated with multiple uplink data channels (for example, PUSCH) using multiple antenna panels. Based on implementing the aligning, one or more processors of the device 505 (for example, processor (s) controlling or incorporated with the UE communications manager 515) may promote high reliability and low latency channel estimation operations, among other benefits.
  • the transmitter 520 may transmit signals generated by other components of the device 505.
  • the transmitter 520 may be collocated with a receiver 510 in a transceiver component.
  • the transmitter 520 may be an example of aspects of the transceiver 820 described with reference to Figure 8.
  • the transmitter 520 may utilize a single antenna or a set of antennas.
  • FIG. 6 shows a block diagram of a device 605 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a device 505, or a UE 115.
  • the device 605 may include a receiver 610, a UE communications manager 615, and a transmitter 635.
  • the UE communications manager 615 can be implemented, at least in part, by one or both of a modem and a processor. Each of these components may be in communication with one another (for example, via one or more buses) .
  • the receiver 610 may receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to aligned frequency hopping) . Information may be passed on to other components of the device 605.
  • the receiver 610 may be an example of aspects of the transceiver 820 described with reference to Figure 8.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the UE communications manager 615 may include a message component 620, a pattern component 625, and a channel component 630.
  • the message component 620 may receive a set of DCI messages each scheduling a data channel, where a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the pattern component 625 may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, and align the first frequency hopping pattern with the second frequency hopping pattern.
  • the channel component 630 may transmit the first PUSCH and the second PUSCH based on the aligning.
  • the transmitter 635 may transmit signals generated by other components of the device 605.
  • the transmitter 635 may be collocated with a receiver 610 in a transceiver component.
  • the transmitter 635 may be an example of aspects of the transceiver 820 described with reference to Figure 8.
  • the transmitter 635 may utilize a single antenna or a set of antennas.
  • Figure 7 shows a block diagram of a UE communications manager 705 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the UE communications manager 705 may be an example of aspects of a UE communications manager 515, a UE communications manager 615, or a UE communications manager 810 described herein.
  • the UE communications manager 705 may include a message component 710, a pattern component 715, a channel component 720, an offset component 725, and a resource component 730. Each of these components may communicate, directly or indirectly, with one another (for example, via one or more buses) .
  • the message component 710 may receive a set of DCI messages each scheduling a data channel, in which a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the pattern component 715 may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH. In some examples, the pattern component 715 may align the first frequency hopping pattern with the second frequency hopping pattern.
  • the pattern component 715 may determine that the first frequency hopping pattern and the second frequency hopping pattern each include an intra-slot frequency hopping pattern. In some examples, the pattern component 715 may align one or more resources of the first frequency hopping pattern in a slot with one or more resources of the second frequency hopping pattern in the slot based on the intra-slot frequency hopping pattern, the one or more resources including one or more resource blocks. Alternatively, the pattern component 715 may determine that the first frequency hopping pattern and the second frequency hopping pattern each include an inter-slot frequency hopping pattern.
  • the pattern component 715 may align one or more resources of the first frequency hopping pattern in a first slot with one or more resources of the second frequency hopping pattern in a second slot based on the inter-slot frequency hopping pattern, the one or more resources including one or more resource blocks.
  • the channel component 720 may transmit the first PUSCH and the second PUSCH based on the aligning.
  • the offset component 725 may determine a first frequency resource offset between a first frequency hop and a second frequency hop of the first frequency hopping pattern based on a first indication received in the first DCI message. In some examples, the offset component 725 may align the first frequency hop and the second frequency hop of the first frequency hopping pattern based on the first frequency resource offset. Additionally or alternatively, the offset component 725 may determine a second frequency resource offset between the first frequency hop and the second frequency hop of the second frequency hopping pattern based on a second indication received in the second DCI message, where aligning the one or more resources of the second frequency hopping pattern includes.
  • the offset component 725 may align the first frequency hop and the second frequency hop of the second frequency hopping pattern based on the second frequency resource offset.
  • the first frequency resource offset associated with the first frequency hopping pattern and the second frequency resource offset associated with the second frequency hopping pattern may be the same based on the first frequency hopping pattern and the second frequency hopping pattern both corresponding to an intra-slot frequency hopping pattern, or an inter-slot frequency hopping pattern, or both.
  • the resource component 730 may determine a beginning symbol of the second frequency hop of the first frequency hopping pattern based on the first indication received in the first DCI message. In some examples, the resource component 730 may align the one or more resources of the first frequency hopping pattern based on the beginning symbol of the second frequency hop of the first frequency hopping pattern. The resource component 730 may determine a beginning symbol of the second frequency hop of the second frequency hopping pattern based on the second indication received in the second DCI message. In some examples, the resource component 730 may align the one or more resources of the second frequency hopping pattern based on the beginning symbol of the second frequency hop of the second frequency hopping pattern. In some examples, a beginning symbol of a second frequency hop of the first frequency hopping pattern and a beginning symbol of a second frequency hop of the second frequency hopping pattern are the same.
  • Figure 8 shows a diagram of a system including a device 805 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 805 may be an example of or include the components of device 505, device 605, or a UE 115.
  • the device 805 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a UE communications manager 810, an I/O controller 815, a transceiver 820, an antenna 825, memory 830, and a processor 840. These components may be in electronic communication via one or more buses (for example, bus 845) .
  • buses for example, bus 845
  • the UE communications manager 810 may receive a set of DCI messages each scheduling a data channel, in which a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the UE communications manager 810 may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, and align the first frequency hopping pattern with the second frequency hopping pattern.
  • the UE communications manager 810 may transmit the first PUSCH and the second PUSCH based on the aligning.
  • At least one implementation may enable the UE communications manager 810 to align multiple frequency hopping patterns associated with multiple uplink data channels (for example, PUSCH) using multiple antenna panels. Based on implementing the aligning, one or more processors of the device 805 (for example, processor (s) controlling or incorporated with the UE communications manager 810) may experience reduce power consumption and promote high reliability and low latency wireless communications (for example, PUSCH transmissions) , among other benefits.
  • processors of the device 805 for example, processor (s) controlling or incorporated with the UE communications manager 810 may experience reduce power consumption and promote high reliability and low latency wireless communications (for example, PUSCH transmissions) , among other benefits.
  • the I/O controller 815 may manage input and output signals for the device 805.
  • the I/O controller 815 may also manage peripherals not integrated into the device 805.
  • the I/O controller 815 may represent a physical connection or port to an external peripheral.
  • the I/O controller 815 may utilize an operating system such as or another known operating system.
  • the I/O controller 815 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 815 may be implemented as part of a processor. A user may interact with the device 805 via the I/O controller 815 or via hardware components controlled by the I/O controller 815.
  • the transceiver 820 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 820 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 820 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 830 may include RAM and ROM.
  • the memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor 840 to perform various functions described herein.
  • the memory 830 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the code 835 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 835 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some examples, the code 835 may not be directly executable by the processor 840 but may cause a computer (for example, when compiled and executed) to perform functions described herein.
  • the processor 840 may include an intelligent hardware device, (for example, a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 840 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 840.
  • the processor 840 may be configured to execute computer-readable instructions stored in a memory (for example, the memory 830) to cause the device 805 to perform various functions (for example, functions or tasks supporting aligned frequency hopping) .
  • Figure 9 shows a block diagram of a device 905 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 905 may be an example of aspects of a base station 105.
  • the device 905 may include a receiver 910, a base station communications manager 915, and a transmitter 920.
  • the base station communications manager 915 can be implemented, at least in part, by one or both of a modem and a processor. Each of these components may be in communication with one another (for example, via one or more buses) .
  • the receiver 910 may receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to aligned frequency hopping) . Information may be passed on to other components of the device 905.
  • the receiver 910 may be an example of aspects of the transceiver 1220 described with reference to Figure 12.
  • the receiver 910 may utilize a single antenna or a set of antennas.
  • the base station communications manager 915 may schedule a first PUSCH and a second PUSCH.
  • the base station communications manager 915 may assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH, and transmit a set of DCI messages, in which a first DCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH.
  • the base station communications manager 915 may receive the first PUSCH and the second PUSCH based on the first frequency hopping pattern and the second frequency hopping pattern.
  • the transmitter 920 may transmit signals generated by other components of the device 905.
  • the transmitter 920 may be collocated with a receiver 910 in a transceiver component.
  • the transmitter 920 may be an example of aspects of the transceiver 1220 described with reference to Figure 12.
  • the transmitter 920 may utilize a single antenna or a set of antennas.
  • Figure 10 shows a block diagram of a device 1005 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 1005 may be an example of aspects of a device 905, or a base station 105.
  • the device 1005 may include a receiver 1010, a base station communications manager 1015, and a transmitter 1035.
  • the base station communications manager 1015 can be implemented, at least in part, by one or both of a modem and a processor. Each of these components may be in communication with one another (for example, via one or more buses) .
  • the receiver 1010 may receive information such as packets, user data, or control information associated with various information channels (for example, control channels, data channels, and information related to aligned frequency hopping) . Information may be passed on to other components of the device 1005.
  • the receiver 1010 may be an example of aspects of the transceiver 1220 described with reference to Figure 12.
  • the receiver 1010 may utilize a single antenna or a set of antennas.
  • the base station communications manager 1015 may be an example of aspects of the base station communications manager 915.
  • the base station communications manager 1015 may include a channel component 1020, a pattern component 1025, and a message component 1030.
  • the channel component 1020 may schedule a first PUSCH and a second PUSCH.
  • the pattern component 1025 may assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH.
  • the message component 1030 may transmit a set of DCI messages, in which a first DCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH.
  • the channel component 1020 may receive the first PUSCH and the second PUSCH based on the first frequency hopping pattern and the second frequency hopping pattern.
  • the transmitter 1035 may transmit signals generated by other components of the device 1005.
  • the transmitter 1035 may be collocated with a receiver 1010 in a transceiver component.
  • the transmitter 1035 may be an example of aspects of the transceiver 1220 described with reference to Figure 12.
  • the transmitter 1035 may utilize a single antenna or a set of antennas.
  • FIG 11 shows a block diagram of a base station communications manager 1105 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the base station communications manager 1105 may be an example of aspects of a base station communications manager 915, a base station communications manager 1015, or a base station communications manager 1210 described herein.
  • the base station communications manager 1105 may include a channel component 1110, a pattern component 1115, and a message component 1120. Each of these components may communicate, directly or indirectly, with one another (for example, via one or more buses) .
  • the channel component 1110 may schedule a first PUSCH and a second PUSCH. In some examples, the channel component 1110 may receive the first PUSCH and the second PUSCH based on the first frequency hopping pattern and the second frequency hopping pattern.
  • the pattern component 1115 may assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH. In some examples, a beginning symbol of a second frequency hop of the first frequency hopping pattern and a beginning symbol of a second frequency hop of the second frequency hopping pattern are the same.
  • the first frequency hopping pattern and the second frequency hopping pattern each include an intra-slot frequency hopping pattern. Alternatively, the first frequency hopping pattern and the second frequency hopping pattern each include an inter-slot frequency hopping pattern.
  • the message component 1120 may transmit a set of DCI messages, in which a first DCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH.
  • the message component 1120 may transmit a first indication in the first DCI message of a first frequency resource offset between a first frequency hop and a second frequency hop of the first frequency hopping pattern associated with the first PUSCH.
  • the message component 1120 may transmit a second indication in the second DCI message of a second frequency resource offset between a first frequency hop and a second frequency hop of the second frequency hopping pattern associated with the second PUSCH.
  • the message component 1120 may transmit a first indication in the first DCI message of a beginning symbol of a second frequency hop of the first frequency hopping pattern associated with the first PUSCH. Additionally or alternatively, the message component 1120 may transmit a second indication in the second DCI message of a beginning symbol of a second frequency hop of the second frequency hopping pattern associated with the second PUSCH.
  • Figure 12 shows a diagram of a system including a device 1205 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the device 1205 may be an example of or include the components of device 905, device 1005, or a base station 105.
  • the device 1205 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a base station communications manager 1210, a network communications manager 1215, a transceiver 1220, an antenna 1225, memory 1230, a processor 1240, and an inter-station communications manager 1245. These components may be in electronic communication via one or more buses (for example, bus 1250) .
  • buses for example, bus 1250
  • the base station communications manager 1210 may schedule a first PUSCH and a second PUSCH.
  • the base station communications manager 1210 may assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH.
  • the base station communications manager 1210 may transmit a set of DCI messages, in which a first DCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH.
  • the base station communications manager 1210 may receive the first PUSCH and the second PUSCH based on the first frequency hopping pattern and the second frequency hopping pattern.
  • the network communications manager 1215 may manage communications with the core network (for example, via one or more wired backhaul links) .
  • the network communications manager 1215 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the transceiver 1220 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 1220 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1220 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the device 1205 may have more than one antenna 1225, which may be capable of concurrently transmitting or receiving multiple wireless transmissions (for example, multiple PUSCH) .
  • the memory 1230 may include RAM, ROM, or a combination thereof.
  • the memory 1230 may store computer-readable code 1235 including instructions that, when executed by a processor (for example, the processor 1240) cause the device to perform various functions described herein.
  • the memory 1230 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the code 1235 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 1235 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some examples, the code 1235 may not be directly executable by the processor 1240 but may cause a computer (for example, when compiled and executed) to perform functions described herein.
  • the processor 1240 may include an intelligent hardware device, (for example, a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 1240 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into processor 1240.
  • the processor 1240 may be configured to execute computer-readable instructions stored in a memory (for example, the memory 1230) to cause the device 1205 to perform various functions (for example, functions or tasks supporting aligned frequency hopping) .
  • the inter-station communications manager 1245 may manage communications with other base station 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other base stations 105. For example, the inter-station communications manager 1245 may coordinate scheduling for transmissions to UEs 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communications manager 1245 may provide an X2 interface within an LTE/LTE-Awireless communication network technology to provide communication between base stations 105.
  • Figure 13 shows a flowchart illustrating a method 1300 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the operations of method 1300 may be implemented by a UE 115 or its components.
  • the operations of method 1300 may be performed by a UE communications manager as described with reference to Figures 5–8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive a set of DCI messages each scheduling a data channel, in which a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed by a message component as described with reference to Figures 5–8.
  • the UE may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH.
  • the operations of 1310 may be performed according to the methods described herein. In some examples, aspects of the operations of 1310 may be performed by a pattern component as described with reference to Figures 5–8.
  • the UE may align the first frequency hopping pattern with the second frequency hopping pattern.
  • the operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be performed by a pattern component as described with reference to Figures 5–8.
  • the UE may transmit the first PUSCH and the second PUSCH based on the aligning.
  • the operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed by a channel component as described with reference to Figures 5–8.
  • Figure 14 shows a flowchart illustrating a method 1400 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the operations of method 1400 may be implemented by a UE 115 or its components.
  • the operations of method 1400 may be performed by a UE communications manager as described with reference to Figures 5–8.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may receive a set of DCI messages each scheduling a data channel, in which a first DCI message of the set of DCI messages schedules a first PUSCH and a second DCI message of the set of DCI messages schedules a second PUSCH.
  • the operations of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed by a message component as described with reference to Figures 5–8.
  • the UE may determine, based on the set of DCI messages, a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH.
  • the operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed by a pattern component as described with reference to Figures 5–8.
  • the UE may determine a first frequency resource offset between a first frequency hop and a second frequency hop of the first frequency hopping pattern based on a first indication received in the first DCI message.
  • the operations of 1415 may be performed according to the methods described herein. In some examples, aspects of the operations of 1415 may be performed by an offset component as described with reference to Figures 5–8.
  • the UE may align the first frequency hop and the second frequency hop of the first frequency hopping pattern based on the first frequency resource offset.
  • the operations of 1420 may be performed according to the methods described herein. In some examples, aspects of the operations of 1420 may be performed by an offset component as described with reference to Figures 5–8.
  • the UE may determine a second frequency resource offset between the first frequency hop and the second frequency hop of the second frequency hopping pattern based on a second indication received in the second DCI message.
  • the operations of 1425 may be performed according to the methods described herein. In some examples, aspects of the operations of 1425 may be performed by an offset component as described with reference to Figures 5–8.
  • the UE may align the first frequency hop and the second frequency hop of the second frequency hopping pattern based on the second frequency resource offset.
  • the operations of 1430 may be performed according to the methods described herein. In some examples, aspects of the operations of 1430 may be performed by an offset component as described with reference to Figures 5–8.
  • the UE may transmit the first PUSCH and the second PUSCH.
  • the operations of 1435 may be performed according to the methods described herein. In some examples, aspects of the operations of 1435 may be performed by a channel component as described with reference to Figures 5–8.
  • Figure 15 shows a flowchart illustrating a method 1500 that supports aligned frequency hopping in accordance with aspects of the present disclosure.
  • the operations of method 1500 may be implemented by a base station 105 or its components.
  • the operations of method 1500 may be performed by a base station communications manager as described with reference to Figures 9–12.
  • a base station may execute a set of instructions to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, a base station may perform aspects of the functions described below using special-purpose hardware.
  • the base station may schedule a first PUSCH and a second PUSCH.
  • the operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a channel component as described with reference to Figures 9–12.
  • the base station may assign a first frequency hopping pattern associated with the first PUSCH and a second frequency hopping pattern associated with the second PUSCH.
  • the operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed by a pattern component as described with reference to Figures 9–12.
  • the base station may transmit a set of DCI messages, in which a first DCI message of the set of DCI messages schedules the first PUSCH and the second DCI message of the set of DCI messages schedules the second PUSCH.
  • the operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed by a message component as described with reference to Figures 9–12.
  • the base station may receive the first PUSCH and the second PUSCH based on the first frequency hopping pattern and the second frequency hopping pattern.
  • the operations of 1520 may be performed according to the methods described herein. In some examples, aspects of the operations of 1520 may be performed by a channel component as described with reference to Figures 9–12.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer.
  • non-transitory computer-readable media may include random-access memory (RAM) , read-only memory (ROM) , electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • flash memory compact disk (CD) ROM or other optical disk storage
  • CD compact disk
  • magnetic disk storage or other magnetic storage devices or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer,
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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

Abstract

L'invention concerne des procédés, des systèmes, et des dispositifs destinés aux communications sans fil. Un dispositif de communication, également connu sous le nom d'équipement utilisateur (UE), peut recevoir un ensemble de messages d'informations de commande de liaison descendante (DCI), chacun planifiant un canal de données, par exemple, un premier message DCI de l'ensemble de messages DCI planifie un premier canal physique partagé de liaison montante (PUSCH) et un second message DCI de l'ensemble de messages DCI planifie un second PUSCH. L'UE peut déterminer un premier modèle de saut de fréquence associé au premier PUSCH et un second modèle de saut de fréquence associé au second PUSCH, et aligner le premier modèle de saut de fréquence avec le second modèle de saut de fréquence. Sur la base des modèles de saut de fréquence alignés, l'UE peut transmettre le premier PUSCH et le second PUSCH. Les motifs de saut de fréquence alignés peuvent ainsi réduire une interférence entre plusieurs PUSCH et améliorer l'estimation du canal pour l'UE.
PCT/CN2020/096570 2020-06-17 2020-06-17 Sauts de fréquence alignés WO2021253282A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20180367185A1 (en) * 2015-11-04 2018-12-20 Lg Electronics Inc. Method and apparatus for handling frequency retuning for machine-type communication user equipment in wireless communication system
CN109937550A (zh) * 2016-11-07 2019-06-25 高通股份有限公司 用于更大小区半径的改进的prach设计
US10608696B2 (en) * 2015-03-31 2020-03-31 Lg Electronics Inc. Method and apparatus for performing frequency hopping for MTC UE in wireless communication system
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US10687320B2 (en) * 2012-01-21 2020-06-16 Huawei Technologies Co., Ltd. Data sending method, data receiving method, base station and user equipment
US10608696B2 (en) * 2015-03-31 2020-03-31 Lg Electronics Inc. Method and apparatus for performing frequency hopping for MTC UE in wireless communication system
US20180367185A1 (en) * 2015-11-04 2018-12-20 Lg Electronics Inc. Method and apparatus for handling frequency retuning for machine-type communication user equipment in wireless communication system
CN109937550A (zh) * 2016-11-07 2019-06-25 高通股份有限公司 用于更大小区半径的改进的prach设计

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