WO2021047293A1 - Configuration semi-statique de créneaux pour porteuses de liaison montante multiplexées par répartition dans le temps - Google Patents

Configuration semi-statique de créneaux pour porteuses de liaison montante multiplexées par répartition dans le temps Download PDF

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Publication number
WO2021047293A1
WO2021047293A1 PCT/CN2020/103224 CN2020103224W WO2021047293A1 WO 2021047293 A1 WO2021047293 A1 WO 2021047293A1 CN 2020103224 W CN2020103224 W CN 2020103224W WO 2021047293 A1 WO2021047293 A1 WO 2021047293A1
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WIPO (PCT)
Prior art keywords
uplink
uplink carrier
slot pattern
slot
signaling
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PCT/CN2020/103224
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English (en)
Inventor
Chenxi HAO
Bo Chen
Hao Xu
Yu Zhang
Chao Wei
Peter Gaal
Wanshi Chen
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Qualcomm Incorporated
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Publication of WO2021047293A1 publication Critical patent/WO2021047293A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames

Definitions

  • aspects of the present disclosure relate generally to wireless communication, and more particularly to techniques for semi-static slot configuration for time division multiplexed uplink carriers.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (for example, bandwidth, transmit power, etc. ) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink (DL) and uplink (UL) .
  • the DL (or forward link) refers to the communication link from the BS to the UE
  • the UL (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a NodeB, an LTE evolved nodeB (eNB) , a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, or a 5G NodeB.
  • eNB LTE evolved nodeB
  • AP access point
  • TRP transmit receive point
  • NR New Radio
  • NR which also may be referred to as 5G
  • 5G is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency-division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the DL, using CP-OFDM or SC-FDM (for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the UL (or a combination thereof) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency-division multiplexing
  • SC-FDM for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • MIMO multiple-input multiple-output
  • the method may include determining a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and transmitting information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include receiving first signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, and receiving second signaling to modify the default slot pattern to switch the one or more slots from being scheduled for uplink communication on the first uplink carrier to uplink communication on the second uplink carrier, where the slot pattern corresponds to the modified default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include receiving signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, and the slot pattern corresponds to the default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include receiving first signaling to indicate multiple candidate slot patterns, each candidate slot pattern including a joint slot configuration for the first uplink carrier and the second uplink carrier, and receiving second signaling to activate one of the multiple candidate slot patterns as the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include receiving first signaling to indicate one or more cell-specific slot patterns for each UE in a cell associated with the base station, and receiving second signaling that indicates the slot pattern that the particular UE is to use for the first uplink carrier and the second uplink carrier based at least in part on the one or more cell-specific slot patterns.
  • the first signaling may include a first radio resource control (RRC) message and the second signaling may include one or more of a second RRC message, a media access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .
  • RRC radio resource control
  • MAC-CE media access control control element
  • DCI downlink control information
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes receiving signaling to activate one of multiple candidate slot patterns that are associated with an uplink mode configured for the UE, where the uplink mode may be a supplemental uplink mode, a carrier aggregation mode, or a dual connectivity mode.
  • the slot pattern may be indicated in signaling dynamically scheduling an uplink transmission, and the signaling may further indicate that the slot pattern is to be used in a slot in which the uplink transmission is scheduled.
  • the method can include transmitting a measurement report to the base station, with the slot pattern to be used for the first uplink carrier and the second uplink carrier based at least in part on the measurement report.
  • the slot pattern may be configured in signaling that includes one or more bits to indicate an assignment of the first set of uplink slots and the second set of uplink slots among the first uplink carrier and the second uplink carrier.
  • communication on the uplink may be restricted on the second uplink carrier during one or more slots or symbols that correspond to the first set of uplink slots on the first uplink carrier.
  • the UE may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to determine a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and transmit information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • the non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to determine a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and transmit information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • the apparatus may include means for means for determining a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and means for transmitting information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • the method may include determining a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and receiving information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include transmitting first signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier and transmitting second signaling to modify the default slot pattern to switch the one or more slots from being scheduled for uplink communication on the first uplink carrier to uplink communication on the second uplink carrier, with the slot pattern corresponding to the modified default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include transmitting signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, with the slot pattern corresponding to the default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include transmitting first signaling to indicate multiple candidate slot patterns, each candidate slot pattern including a joint slot configuration for the first uplink carrier and the second uplink carrier, and transmitting second signaling to activate one of the multiple candidate slot patterns as the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern may include transmitting first signaling to indicate one or more cell-specific slot patterns for each UE in a cell associated with the base station, and transmitting second signaling that indicates the slot pattern that the particular UE is to use for the first uplink carrier and the second uplink carrier based at least in part on the one or more cell-specific slot patterns.
  • the first signaling may include a first RRC message and the second signaling may include one or more of a second RRC message, a MAC-CE, or DCI.
  • determining the slot pattern that the UE is to use for the first uplink carrier and the second uplink carrier may include transmitting, to the UE, signaling to activate one of multiple candidate slot patterns that are associated with an uplink mode configured for the UE, where the uplink mode may be a supplemental uplink mode, a carrier aggregation mode, or a dual connectivity mode.
  • the method can include transmitting, to the UE, information indicating the slot pattern in signaling dynamically scheduling an uplink transmission, where the signaling further indicates that the slot pattern is to be used in a slot in which the uplink transmission is scheduled.
  • the method can include receiving a measurement report from the UE and determining the slot pattern to be used for the first uplink carrier and the second uplink carrier based at least in part on the measurement report.
  • the information configuring the slot pattern may include one or more bits to indicate an assignment of the first set of uplink slots and the second set of uplink slots among the first uplink carrier and the second uplink carrier.
  • communication on the uplink may be restricted on the second uplink carrier during one or more slots or symbols that correspond to the first set of uplink slots on the first uplink carrier.
  • the base station may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to determine a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and receive information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • the non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a base station, may cause the one or more processors to determine a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and receive information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • the apparatus may include means for determining a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier; and means for receiving information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • Figure 1 is a diagram illustrating an example of a wireless network.
  • Figure 2 is a diagram illustrating an example of a base station (BS) in communication with a user equipment (UE) in a wireless network.
  • BS base station
  • UE user equipment
  • Figure 3A is a diagram illustrating an example of a frame structure in a wireless network.
  • Figure 3B is a diagram illustrating an example synchronization signal (SS) hierarchy in a wireless network.
  • SS synchronization signal
  • Figure 4 is a diagram illustrating an example slot format with a normal cyclic prefix.
  • Figure 5 is a diagram illustrating an example of a downlink (DL) -centric slot.
  • Figure 6 is a diagram illustrating an example of an uplink (UL) -centric slot.
  • Figures 7A–7E are diagrams illustrating examples of semi-static slot configuration for time division multiplexed uplink carriers.
  • Figure 8 is a diagram illustrating an example process performed, for example, by a UE.
  • Figure 9 is a diagram illustrating an example process performed, for example, by a BS.
  • the described implementations may be implemented in any device, system or network that is capable of transmitting and receiving radio frequency signals according to any of the wireless communication standards, including any of the IEEE 802.11 standards, the standard, code division multiple access (CDMA) , frequency division multiple access (FDMA) , time division multiple access (TDMA) , Global System for Mobile communications (GSM) , GSM/General Packet Radio Service (GPRS) , Enhanced Data GSM Environment (EDGE) , Terrestrial Trunked Radio (TETRA) , Wideband-CDMA (W-CDMA) , Evolution Data Optimized (EV-DO) , 1xEV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA) , High Speed Downlink Packet Access (HSDPA) , High Speed Uplink Packet Access (HSUPA) , Evolved High Speed Packet Access (HSPA+) , Long Term Evolution (LTE) , AMPS, or other known signals that are used
  • Time division multiplexing (TDM) techniques may be used in connection with an uplink carrier aggregation mode to enable a UE to perform uplink transmission across multiple component carriers.
  • the multiple component carriers may include a primary uplink carrier and one or more secondary uplink carriers, and a TDM pattern may be defined such that the UE can transmit on only one uplink carrier at a time (such as in a particular symbol or slot) .
  • TDM techniques may be used in connection with the uplink carrier aggregation mode because certain bands operating at high frequencies may have a shorter coverage range compared to other bands operating at relatively lower frequencies (such as the 3.5 gigahertz (GHz) frequency band operating in time division duplexing (TDD) mode exhibiting about 9 decibels (dB) coverage loss, compared to the 2.1 GHz band, which includes an uplink frequency band that is paired with a downlink frequency band operating in frequency division duplexing (FDD) mode) .
  • GHz gigahertz
  • TDD time division duplexing
  • FDD frequency division duplexing
  • carrier aggregation techniques that support concurrent or simultaneous transmission via multiple component carriers are associated with bottlenecks due to increased UE implementation complexity because the UE has to operate on multiple frequencies simultaneously.
  • the UE can only use one transmit antenna in each frequency band, creating further bottlenecks.
  • TDM techniques can be implemented in connection with uplink carrier aggregation to enable support for multiple transmit antennas in a high-frequency band (such as the 3.5 GHz frequency band) and a single transmit antenna in a low-frequency band (such as the 2.1 GHz frequency band) because there are no simultaneous transmissions on different frequency bands.
  • TDM techniques may allow a network to schedule UEs in a manner that may improve utilization of network resources. For example, different TDM patterns may be configured based on the location of a UE within a cell. For example, a UE located near an edge of a cell associated with a base station may be scheduled on the low band to increase coverage.
  • a UE located near the center or median of the cell may be scheduled on the high band to exploit the larger available bandwidth on the high band, and in other uplink slots, the UE located near the center or median of the cell may be scheduled on the low band to enable fast hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback as there may be more uplink resources available in the low band.
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • TDM for uplink carriers may be implemented in a supplemental uplink (SUL) mode, an inter-band carrier aggregation mode, or a dual connectivity mode (such as an Evolved Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (E-UTRAN) -New Radio dual connectivity (EN-DC) mode) , among other examples.
  • SUL supplemental uplink
  • UMTS Evolved Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System
  • EN-DC New Radio dual connectivity
  • a UE may be configured with two uplink carriers (such as a TDD carrier and an SUL carrier) and one downlink carrier (such as the TDD carrier) , and the UE may be permitted to operate on only one uplink carrier at a time (such as in a particular symbol or slot) .
  • the UE can be scheduled for uplink transmission on either uplink carrier in an arbitrary symbol or slot.
  • the SUL mode can support one transmit antenna on each uplink carrier with substantially no switching time between uplink carriers, or the SUL mode can support two transmit antennas on the primary uplink carrier (such as the TDD carrier) and one transmit antenna on the SUL carrier, with a small switching time between carriers (such as, for example, 35, 70, or 140 microseconds) .
  • the SUL mode can only be configured in a co-sited case, where both uplink carriers are from the base station because there is only one downlink carrier.
  • the UE may be configured with two uplink carriers (such as a TDD carrier and an FDD uplink carrier) and two downlink carriers (such as the TDD carrier and an FDD downlink carrier paired with the FDD uplink carrier) , and the UE may be permitted to operate on only one uplink carrier at a time, according to a semi-static or dynamic TDM pattern.
  • each uplink carrier may be associated with a different reference downlink carrier (such as for indicating a timing advance (TA) or power control to be used on the corresponding uplink carrier) .
  • TA timing advance
  • the inter-band carrier aggregation mode offers better performance (such as more flexible power control or increased reliability, compared to SUL, because there are two downlink carriers) and more flexible deployment because TDM carrier aggregation can be implemented in co-sited or distributed base station architectures.
  • the UE may be configured to communicate on an uplink using two or more radio access technologies (RATs) .
  • RATs radio access technologies
  • a UE may be configured with one or more uplink carriers on an E-UTRAN, such as a 4G/LTE wireless network, and the UE may be configured with one or more uplink carriers on a 5G/NR network.
  • the UE may transmit on one or more 4G/LTE uplink carriers and one or more 5G/NR uplink carriers.
  • the UE may transmit on an uplink carrier associated with one RAT at a time (such as either a 4G/LTE uplink carrier or a 5G/NR uplink carrier) .
  • TDM techniques in connection with uplink carrier aggregation (whether in SUL mode, inter-band carrier aggregation mode, dual connectivity (DC) mode, or another mode) offers better performance in various respects relative to carrier aggregation techniques that enable concurrent transmission via multiple uplink carriers
  • implementing TDM techniques for multiple uplink carriers poses various challenges. For example, enabling dynamic switching between uplink carriers (such as between different TDM patterns for UEs located at a cell center and UEs located at a cell edge or UEs configured to operate in different uplink modes) increases UE complexity because the UE does not know which uplink carrier or which slots the base station will use to schedule uplink transmissions until the UE receives an uplink grant.
  • a semi-static uplink slot configuration may enable the UE to determine, in advance, when to switch between uplink carriers. For example, in some cases, a first TDM pattern defined for cell center UEs may assign one or more uplink slots to an uplink carrier operating at a higher frequency, to enable the UE to perform high rate transmissions, and other uplink slots may be assigned to the uplink carrier operating at the lower frequency to enable fast HARQ-ACK feedback for downlink data transmitted on the higher frequency band. Furthermore, a second TDM pattern defined for cell edge UEs may assign one or more uplink slots to the uplink carrier operating at the lower frequency to address coverage issues.
  • different TDM slot patterns may be defined for different uplink modes, such as a first set of candidate slot patterns to be used by a UE operating in the SUL mode, a second set of candidate slot patterns to be used by a UE operating in the inter-band carrier aggregation mode, or a third set of candidate slot patterns to be used by a UE operating in a dual connectivity mode, among other examples.
  • the base station may transmit, and the UE may receive, signaling to activate one of the candidate slot patterns that are associated with the uplink mode configured for the UE. Accordingly, some aspects described herein provide techniques and apparatuses for configuring multiple slot patterns (or TDM patterns or candidate slot patterns) and causing a UE to switch among the slot patterns.
  • the techniques and apparatuses described herein improve efficiency of configuring a slot pattern that a UE is to use to perform uplink transmissions on a first uplink carrier and a second uplink carrier by configuring one or more cell-specific slot patterns for all UEs located in a cell associated with a base station and using UE-specific signaling to modify or activate a particular cell-specific slot pattern.
  • the techniques and apparatuses described herein provide the further advantage of enabling a UE to operate according to a particular slot pattern that improves performance of the UE based on a location of the UE within the cell (such as by signaling the UE to operate according to a slot pattern in which uplink slots are assigned to a higher frequency band to enable higher data rate transmissions at a cell center or by signaling the UE to operate according to a slot pattern in which uplink slots are assigned to a lower frequency band to improve coverage at a cell edge) .
  • the techniques and apparatuses described herein also may enable a UE to operate according to a particular slot pattern based on a multi-carrier uplink mode in which the UE is configured to operate.
  • FIG. 1 is a diagram illustrating an example of a wireless network 100.
  • the wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, or another type of network.
  • the wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a base station (BS) is an entity that communicates with a user equipment (UE) and also may be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, or a transmit receive point (TRP) .
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS, a BS subsystem serving this coverage area, or a combination thereof, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, another type of cell, or a combination thereof.
  • a macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs having association with the femto cell (for example, UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (for example, three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another as well as to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection, a virtual network, or a combination thereof using any suitable transport network.
  • the wireless network 100 may include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (for example, a BS or a UE) and send a transmission of the data to a downstream station (for example, a UE or a BS) .
  • a relay station also may be a UE that can relay transmissions for other UEs.
  • a relay BS 110d may communicate with a macro BS 110a and a UE 120d in order to facilitate communication between the macro BS 110a and the UE 120d.
  • a relay BS also may be referred to as a relay station, a relay base station, a relay, etc.
  • the wireless network 100 may be a heterogeneous network that includes BSs of different types, for example, macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100.
  • macro BSs may have a high transmit power level (for example, 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (for example, 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs via a backhaul.
  • the BSs also may communicate with one another, for example, directly or indirectly via a wireless or wireline backhaul.
  • Multiple UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE also may be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc.
  • a UE may be a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (for example, smart ring, smart bracelet) ) , an entertainment device (for example, a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a base station, another device (for example, remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (for example, a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • a UE 120 may be included inside a housing that houses components of the UE 120, such as processor components, memory components, similar components, or other components.
  • the processor components and the memory components may be coupled together.
  • the processor components for example, one or more processors
  • the memory components for example, a memory
  • the processor components may be operatively coupled, communicatively coupled, electronically coupled, or electrically coupled, among other examples.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT also may be referred to as a radio technology, an air interface, etc.
  • a frequency also may be referred to as a carrier, a frequency channel, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (for example, without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or similar protocol) , a mesh network, or similar networks, or combinations thereof.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, as well as other operations described elsewhere herein as being performed by the base station 110.
  • Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, or channels.
  • devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz.
  • devices of the wireless network 100 may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz.
  • FR1 and FR2 The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies.
  • FR1 is often referred to as a “sub-6 GHz” band.
  • FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • sub-6 GHz may broadly represent frequencies less than 6 GHz, frequencies within FR1, mid-band frequencies (for example, greater than 7.125 GHz) , or a combination thereof.
  • millimeter wave may broadly represent frequencies within the EHF band, frequencies within FR2, mid-band frequencies (for example, less than 24.25 GHz) , or a combination thereof. It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • FIG. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100.
  • the base station 110 may be equipped with T antennas 234a through 234t
  • the UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based on channel quality indicators (CQIs) received from the UE, process (for example, encode and modulate) the data for each UE based on the MCS(s) selected for the UE, and provide data symbols for all UEs.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • the transmit processor 220 also may process system information and control information (for example, CQI requests, grants, upper layer signaling, etc. ) and provide overhead symbols and control symbols.
  • the transmit processor 220 also may generate reference symbols for reference signals and synchronization.
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (for example, precoding) on the data symbols, the control symbols, the overhead symbols, or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (for example, for OFDM, etc. ) to obtain an output sample stream. Each modulator 232 may further process (for example, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from the modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from the base station 110 or other base stations and may provide received signals to the demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (for example, filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (for example, for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (for example, demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • controller/processor may refer to one or more controllers, one or more processors, or a combination thereof.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , etc.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of the UE 120 may be included in a housing.
  • the network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.
  • the network controller 130 may include, for example, one or more devices in a core network.
  • the network controller 130 may communicate with the base station 110 via the communication unit 294.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (for example, for reports including RSRP, RSSI, RSRQ, CQI, etc. ) from a controller/processor 280.
  • the transmit processor 264 also may generate reference symbols for one or more reference signals.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators 254a through 254r (for example, for DFT-s-OFDM, CP-OFDM, etc. ) , and transmitted to the base station 110.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 252, the modulators 254, the demodulators 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266.
  • the transceiver may be used by a processor (for example, the controller/processor 280) and the memory 282 to perform aspects of any of the processes described herein.
  • the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller/processor 240.
  • the base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244.
  • the base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink communications, uplink communications, or a combination thereof.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 234, the modulators 232, the demodulators 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, or the TX MIMO processor 230.
  • the transceiver may be used by a processor (for example, the controller/processor 240) and a memory 242 to perform aspects of any of the processes described herein.
  • the controller/processor 280 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the UE 120) .
  • a processing system of the UE 120 may refer to a system including the various other components or subcomponents of the UE 120.
  • the processing system of the UE 120 may interface with other components of the UE 120, and may process information received from other components (such as inputs or signals) , output information to other components, etc.
  • a chip or modem of the UE 120 may include a processing system, a first interface to receive or obtain information, and a second interface to output, transmit or provide information.
  • the first interface may refer to an interface between the processing system of the chip or modem and a receiver, such that the UE 120 may receive information or signal inputs, and the information may be passed to the processing system.
  • the second interface may refer to an interface between the processing system of the chip or modem and a transmitter, such that the UE 120 may transmit information output from the chip or modem.
  • the second interface also may obtain or receive information or signal inputs, and the first interface also may output, transmit or provide information.
  • the controller/processor 240 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the base station 110) .
  • a processing system of the base station 110 may refer to a system including the various other components or subcomponents of the base station 110.
  • the processing system of the base station 110 may interface with other components of the base station 110, and may process information received from other components (such as inputs or signals) , output information to other components, etc.
  • a chip or modem of the base station 110 may include a processing system, a first interface to receive or obtain information, and a second interface to output, transmit or provide information.
  • the first interface may refer to an interface between the processing system of the chip or modem and a receiver, such that the base station 110 may receive information or signal inputs, and the information may be passed to the processing system.
  • the second interface may refer to an interface between the processing system of the chip or modem and a transmitter, such that the base station 110 may transmit information output from the chip or modem.
  • the second interface also may obtain or receive information or signal inputs, and the first interface also may output, transmit or provide information.
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, or any other component (s) of Figure 2 may perform one or more techniques associated with semi-static slot configuration for time division multiplexed uplink carriers, as described in more detail elsewhere herein.
  • the controller/processor 240 of the base station 110, the controller/processor 280 of the UE 120, or any other component (s) (or combinations of components) of Figure 2 may perform or direct operations of, for example, process 800 of Figure 8, process 900 of Figure 9, or other processes as described herein.
  • the memory 242 and the memory 282 may store data and program codes for the base station 110 and the UE 120, respectively.
  • the memory 242 and the memory 282 may include a non-transitory computer-readable medium storing one or more instructions (for example, code or program code) for wireless communication.
  • the one or more instructions when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the base station 110 or the UE 120, may cause the one or more processors, the UE 120, or the base station 110 to perform or direct operations of, for example, process 800 of Figure 8, process 900 of Figure 9, or other processes as described herein.
  • the UE 120 may include means for determining a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier, means for transmitting information to the base station 110 on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier, or the like, or combinations thereof.
  • such means may include one or more components of the UE 120 described in connection with Figure 2, such as the controller/processor 280, the transmit processor 264, the TX MIMO processor 266, the MOD 254, one or more antennas 252, the DEMOD 254, the MIMO detector 256, or the receive processor 258, among other examples.
  • the base station 110 may include means for determining a slot pattern that the UE 120 is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier, means for receiving information transmitted by the UE 120 on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier, or the like, or combinations thereof.
  • such means may include one or more components of the base station 110 described in connection with Figure 2, such as one or more antennas 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller/processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, or the antenna 234, among other examples.
  • While blocks in Figure 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components.
  • the functions described with respect to the transmit processor 264, the receive processor 258, the TX MIMO processor 266, or another processor may be performed by or under the control of the controller/processor 280.
  • FIG. 3A is a block diagram conceptually illustrating an example frame structure 300 in a wireless network.
  • frame structure 300 may be for FDD in the wireless network, which may include a 5G NR wireless network or another type of wireless network.
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames (sometimes referred to as frames) .
  • Each radio frame may have a predetermined duration (for example, 10 milliseconds (ms) ) and may be partitioned into a set of Z (Z ⁇ 1) subframes (for example, with indices of 0 through Z-1) .
  • Each subframe may have a predetermined duration (for example, 1 ms) and may include a set of slots (for example, 2 m slots per subframe are shown in Figure 3A, where m is a numerology used for a transmission, such as 0, 1, 2, 3, 4, or the like) .
  • Each slot may include a set of L symbol periods.
  • each slot may include fourteen symbol periods (for example, as shown in Figure 3A) , seven symbol periods, or another number of symbol periods.
  • the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices of 0 through 2L–1.
  • a scheduling unit for the FDD may frame-based, subframe-based, slot-based, symbol-based, or the like.
  • a wireless communication structure may refer to a periodic time-bounded communication unit defined by a wireless communication standard or protocol. Additionally, or alternatively, different configurations of wireless communication structures than those shown in Figure 3A may be used.
  • a base station may transmit synchronization signals.
  • a base station may transmit a primary synchronization signal (PSS) , a secondary synchronization signal (SSS) , or the like, on the downlink for each cell supported by the base station.
  • PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may be used by UEs to determine symbol timing
  • the SSS may be used by UEs to determine a physical cell identifier, associated with the base station, and frame timing.
  • the base station also may transmit a physical broadcast channel (PBCH) .
  • the PBCH may carry some system information, such as system information that supports initial access by UEs.
  • the base station may transmit the PSS, the SSS, the PBCH, or a combination thereof in accordance with a synchronization communication hierarchy (for example, a synchronization signal (SS) hierarchy) including multiple synchronization communications (for example, SS blocks) , as described below in connection with Figure 3B.
  • a synchronization communication hierarchy for example, a synchronization signal (SS) hierarchy
  • multiple synchronization communications for example, SS blocks
  • Figure 3B is a block diagram conceptually illustrating an example SS hierarchy in a wireless network.
  • the example SS hierarchy may be an example of a synchronization communication hierarchy.
  • the SS hierarchy may include an SS burst set, which may include a plurality of SS bursts (identified as SS burst 0 through SS burst B-1, where B is a maximum number of repetitions of the SS burst that may be transmitted by the base station) .
  • each SS burst may include one or more SS blocks (identified as SS block 0 through SS block (b max_SS -1) , where b max_SS -1 is a maximum number of SS blocks that can be carried by an SS burst) .
  • different SS blocks may be beam- formed differently.
  • An SS burst set may be periodically transmitted by a wireless node, such as every X milliseconds, as shown in Figure 3B.
  • an SS burst set may have a fixed or dynamic length, shown as Y milliseconds in Figure 3B.
  • the SS burst set shown in Figure 3B is an example of a synchronization communication set, and other synchronization communication sets may be used in connection with the techniques described herein.
  • the SS block shown in Figure 3B is an example of a synchronization communication, and other synchronization communications may be used in connection with the techniques described herein.
  • an SS block includes resources that carry the PSS, the SSS, the PBCH, or other synchronization signals (for example, a tertiary synchronization signal (TSS) ) or synchronization channels.
  • TSS tertiary synchronization signal
  • multiple SS blocks are included in an SS burst, and the PSS, the SSS, or the PBCH may be the same across each SS block of the SS burst.
  • a single SS block may be included in an SS burst.
  • the SS block may be at least four symbol periods in length, where each symbol carries one or more of the PSS (for example, occupying one symbol) , the SSS (for example, occupying one symbol) , or the PBCH (for example, occupying two symbols) .
  • the symbols of an SS block are consecutive, as shown in Figure 3B. In some aspects, the symbols of an SS block are non-consecutive. Similarly, in some aspects, one or more SS blocks of the SS burst may be transmitted in consecutive radio resources (for example, consecutive symbol periods) during one or more slots. Additionally, or alternatively, one or more SS blocks of the SS burst may be transmitted in non-consecutive radio resources.
  • the SS bursts may have a burst period, whereby the SS blocks of the SS burst are transmitted by the base station according to the burst period. In other words, the SS blocks may be repeated during each SS burst.
  • the SS burst set may have a burst set periodicity, whereby the SS bursts of the SS burst set are transmitted by the base station according to the fixed burst set periodicity. In other words, the SS bursts may be repeated during each SS burst set.
  • the base station may transmit system information, such as system information blocks (SIBs) on a physical downlink shared channel (PDSCH) in certain slots.
  • SIBs system information blocks
  • the base station may transmit control information/data on a physical downlink control channel (PDCCH) in C symbol periods of a slot, where B may be configurable for each slot.
  • the base station may transmit traffic data or other data on the PDSCH in the remaining symbol periods of each slot.
  • Figure 4 is a block diagram conceptually illustrating an example slot format 410 with a normal cyclic prefix.
  • the available time frequency resources may be partitioned into resource blocks.
  • Each resource block may cover a set of subcarriers (for example, 12 subcarriers) in one slot and may include a number of resource elements.
  • Each resource element may cover one subcarrier in one symbol period (for example, in time) and may be used to send one modulation symbol, which may be a real or complex value.
  • An interlace structure may be used for each of the downlink and uplink for FDD in certain telecommunications systems (for example, NR) .
  • Q interlaces with indices of 0 through Q –1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value.
  • Each interlace may include slots that are spaced apart by Q frames.
  • interlace q may include slots q, q + Q, q + 2Q, etc., where q ⁇ ⁇ 0, ..., Q –1 ⁇ .
  • a UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, or the like, or combinations thereof. Received signal quality may be quantified by a signal-to-noise-and-interference ratio (SNIR) , or a reference signal received quality (RSRQ) , or some other metric.
  • SNIR signal-to-noise-and-interference ratio
  • RSRQ reference signal received quality
  • the UE may operate in a dominant interference scenario in which the UE may observe high interference from one or more interfering BSs.
  • New Radio may refer to radios configured to operate according to a new air interface (for example, other than Orthogonal Frequency Divisional Multiple Access (OFDMA) -based air interfaces) or fixed transport layer (for example, other than Internet Protocol (IP) ) .
  • NR may utilize OFDM with a CP (herein referred to as cyclic prefix OFDM or CP-OFDM) or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • OFDM Orthogonal Frequency Divisional Multiple Access
  • IP Internet Protocol
  • NR may, for example, utilize OFDM with a CP (herein referred to as CP-OFDM) or discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD.
  • NR may include Enhanced Mobile Broadband (eMBB) service targeting wide bandwidth (for example, 80 megahertz (MHz) and beyond) , millimeter wave (mmW) targeting high carrier frequency (for example, 60 gigahertz (GHz) ) , massive MTC (mMTC) targeting non-backward compatible MTC techniques, or mission critical targeting ultra reliable low latency communications (URLLC) service.
  • eMBB Enhanced Mobile Broadband
  • mmW millimeter wave
  • mMTC massive MTC
  • URLLC ultra reliable low latency communications
  • NR resource blocks may span 12 sub-carriers with a sub-carrier bandwidth of 60 or 120 kilohertz (kHz) over a 0.1 millisecond (ms) duration.
  • Each radio frame may include 40 slots and may have a length of 10 milliseconds (ms) . Consequently, each slot may have a length of 0.25 ms.
  • Each slot may indicate a link direction (for example, DL or UL) for data transmission and the link direction for each slot may be dynamically switched.
  • Each slot may include DL/UL data as well as DL/UL control data.
  • NR may support a different air interface, other than an OFDM-based interface.
  • NR networks may include entities such as central units or distributed units.
  • FIG. 5 is a diagram conceptually illustrating an example 500 of a DL-centric slot or wireless communication structure.
  • the DL-centric slot may include a control portion 502.
  • the control portion 502 may exist in the initial or beginning portion of the DL-centric slot.
  • the control portion 502 may include various scheduling information or control information corresponding to various portions of the DL-centric slot.
  • the control portion 502 may be a physical DL control channel (PDCCH) , as indicated in Figure 5.
  • PDCH physical DL control channel
  • control portion 502 may include legacy PDCCH information, shortened PDCCH (sPDCCH) information) , a control format indicator (CFI) value (for example, carried on a physical control format indicator channel (PCFICH) ) , one or more grants (for example, downlink grants, uplink grants, etc. ) , or the like.
  • legacy PDCCH information shortened PDCCH (sPDCCH) information
  • CFI control format indicator
  • PCFICH physical control format indicator channel
  • grants for example, downlink grants, uplink grants, etc.
  • the DL-centric slot also may include a DL data portion 504.
  • the DL data portion 504 may sometimes be referred to as the payload of the DL-centric slot.
  • the DL data portion 504 may include the communication resources utilized to communicate DL data from the scheduling entity (for example, UE or BS) to the subordinate entity (for example, UE) .
  • the DL data portion 504 may be a physical DL shared channel (PDSCH) .
  • PDSCH physical DL shared channel
  • the DL-centric slot also may include an UL short burst portion 506.
  • the UL short burst portion 506 may sometimes be referred to as an UL burst, an UL burst portion, a common UL burst, a short burst, an UL short burst, a common UL short burst, a common UL short burst portion, or various other suitable terms.
  • the UL short burst portion 506 may include one or more reference signals.
  • the UL short burst portion 506 may include feedback information corresponding to various other portions of the DL-centric slot.
  • the UL short burst portion 506 may include feedback information corresponding to the control portion 502 or the data portion 504.
  • Non-limiting examples of information that may be included in the UL short burst portion 506 include an ACK signal (for example, a PUCCH ACK, a PUSCH ACK, an immediate ACK) , a NACK signal (for example, a PUCCH NACK, a PUSCH NACK, an immediate NACK) , a scheduling request (SR) , a buffer status report (BSR) , a HARQ indicator, a channel state indication (CSI) , a channel quality indicator (CQI) , a sounding reference signal (SRS) , a demodulation reference signal (DMRS) , PUSCH data, or various other suitable types of information.
  • the UL short burst portion 506 may include additional or alternative information, such as information pertaining to random access channel (RACH) procedures, scheduling requests, and various other suitable types of information.
  • the end of the DL data portion 504 may be separated in time from the beginning of the UL short burst portion 506.
  • This time separation may sometimes be referred to as a gap, a guard period, a guard interval, or various other suitable terms.
  • This separation provides time for the switch-over from DL communication (for example, reception operation by the subordinate entity (for example, UE) ) to UL communication (for example, transmission by the subordinate entity (for example, UE) ) .
  • DL communication for example, reception operation by the subordinate entity (for example, UE)
  • UL communication for example, transmission by the subordinate entity (for example, UE)
  • FIG. 6 is a diagram conceptually illustrating an example 600 of a UL-centric slot or wireless communication structure.
  • the UL-centric slot may include a control portion 602.
  • the control portion 602 may exist in the initial or beginning portion of the UL-centric slot.
  • the control portion 602 in Figure 6 may be similar to the control portion 502 described above with reference to Figure 5.
  • the UL-centric slot also may include an UL long burst portion 604.
  • the UL long burst portion 604 may sometimes be referred to as the payload of the UL-centric slot.
  • the UL portion may refer to the communication resources utilized to communicate UL data from the subordinate entity (for example, UE) to the scheduling entity (for example, UE or BS) .
  • the control portion 602 may be a physical DL control channel (PDCCH) .
  • PDCCH physical DL control channel
  • the end of the control portion 602 may be separated in time from the beginning of the UL long burst portion 604.
  • This time separation may sometimes be referred to as a gap, guard period, guard interval, or various other suitable terms.
  • This separation provides time for the switch-over from DL communication (for example, reception operation by the scheduling entity) to UL communication (for example, transmission by the scheduling entity) .
  • the UL-centric slot also may include an UL short burst portion 606.
  • the UL short burst portion 606 in Figure 6 may be similar to the UL short burst portion 506 described above with reference to Figure 5, and may include any of the information described above in connection with Figure 5.
  • the foregoing is merely one example of an UL-centric wireless communication structure, and alternative structures having similar features may be used without necessarily deviating from the aspects described herein.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (for example, UE1) to another subordinate entity (for example, UE2) without relaying that communication through the scheduling entity (for example, UE or BS) , even though the scheduling entity may be utilized for scheduling or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • a wireless communication structure such as a frame, may include both UL-centric slots and DL-centric slots.
  • the ratio of UL-centric slots to DL-centric slots in a frame may be dynamically adjusted based at least in part on the amount of UL data and the amount of DL data that are transmitted. For example, if there is more UL data, then the ratio of UL-centric slots to DL-centric slots may be increased. Conversely, if there is more DL data, then the ratio of UL-centric slots to DL-centric slots may be decreased.
  • FIGS 7A–7E are diagrams illustrating examples 700 of semi-static slot configuration for time division multiplexed uplink carriers.
  • a UE such as a UE 120
  • a base station such as a base station 110
  • the base station may be associated with a cell in which multiple uplink carriers are configured and time division multiplexed with one another, whereby the UE can perform transmission via one uplink carrier at a time (such as within a particular symbol or slot) .
  • the multiple uplink carriers may be configured in a supplemental uplink (SUL) mode, an inter-band carrier aggregation mode, or a dual connectivity mode (such as an E-UTRAN-NR dual connectivity (EN-DC) mode) , among other examples.
  • the multiple uplink carriers may include a first uplink carrier operating in a time division duplexing (TDD) mode (such as in the 3.5 GHz frequency band) and a second uplink carrier operating in frequency division duplexing (FDD) mode (such as in the 2.1 GHz frequency band) or an SUL mode.
  • TDD time division duplexing
  • FDD frequency division duplexing
  • the multiple uplink carriers may include a first uplink carrier associated with a first radio access technology (RAT) , such as a 4G/LTE RAT, and a second uplink carrier associated with a second RAT, such as a 5G/NR RAT.
  • RAT radio access technology
  • the multiple uplink carriers may be associated with different base stations, different TRPs associated with a single base station, or the like.
  • the base station may transmit, and the UE may receive, cell-specific signaling to configure one or more slot patterns for the multiple uplink carriers that are time division multiplexed with one another.
  • the cell-specific signaling may include higher-layer signaling, such as a radio resource control (RRC) message, to indicate a default slot pattern for a primary uplink carrier, as described in further detail below with reference to Figure 7B.
  • RRC radio resource control
  • the cell-specific signaling may include higher-layer signaling, such as an RRC message, to indicate multiple candidate slot patterns, and each of the multiple candidate slot patterns may include a joint slot configuration to be applied to the multiple uplink carriers, as described in further detail below with reference to Figure 7C.
  • the cell-specific signaling may be applicable to each UE that is located in the cell associated with the base station.
  • the candidate slot pattern (s) configured for the multiple uplink carriers may not be explicitly signaled, but may instead be based on a multi-carrier uplink mode in which the UE is configured to operate. For example, when the UE is operating in the SUL mode, the UE may be configured with two candidate slot patterns, including a first candidate slot pattern in which the uplink slot (s) are on the uplink carrier associated with the serving cell and a second candidate slot pattern in which the uplink slot (s) are on the SUL carrier.
  • the UE when the UE is operating in inter-band carrier aggregation mode, the UE may be configured with three candidate slot patterns, including a first candidate slot pattern in which the uplink slot (s) are on a first uplink carrier, a second candidate slot pattern in which the uplink slot (s) are on a second uplink carrier, and a third candidate slot pattern in which the uplink slot (s) are on both the first uplink carrier and the second uplink carrier.
  • the UE when the UE is operating in the dual connectivity mode, the UE may be configured with three candidate slot patterns, including a first candidate slot pattern in which the uplink slot (s) are on a primary RAT, a second candidate slot pattern in which the uplink slot (s) are on a secondary RAT, and a third candidate slot pattern in which the uplink slot (s) are on both the primary RAT and the secondary RAT.
  • the base station may transmit, and the UE may receive, UE-specific signaling to assign uplink slots among the first uplink carrier and the second uplink carrier.
  • the UE-specific signaling may include an RRC message, a media access control (MAC) control element (MAC-CE) , or downlink control information (DCI) .
  • the cell-specific signaling indicates a default slot pattern for the primary uplink carrier
  • the UE-specific signaling may indicate one or more modifications to the default slot pattern (such as switching all uplink slots in the primary uplink carrier to instead be assigned to the corresponding slots on the secondary uplink carrier) .
  • the UE-specific signaling may indicate one of the multiple candidate slot patterns to be activated. Additionally, or alternatively, the UE-specific signaling may be provided to activate one of multiple candidate slot patterns that are associated with an uplink mode in which the UE is configured to operate (such as one of the two candidate slot patterns associated with the SUL mode, one of the three candidate slot patterns associated with the inter-band carrier aggregation mode, or one of the three candidate slot patterns associated with the dual connectivity mode) .
  • the UE-specific signaling may dynamically indicate the slot pattern to be used in one or more slots by modifying the default slot pattern or dynamically indicating one of multiple candidate slot patterns to be activated.
  • the UE-specific signaling may include DCI (or other dynamic signaling, such as a MAC-CE) that the UE receives in a slot T 0 -T offset to schedule an uplink transmission in slot T 0 .
  • the slot pattern to be applied in slot T 0 may be determined by the modified slot pattern or the activated slot pattern indicated in the DCI scheduling the uplink transmission.
  • the slot pattern indicated in the DCI scheduling the uplink transmission may be applied in the slot in which the uplink transmission is scheduled (slot T 0 ) .
  • the slot pattern indicated in the DCI scheduling the uplink transmission may remain effective until the UE receives additional signaling to modify or switch the slot pattern, or the slot pattern indicated in the DCI scheduling the uplink transmission may remain effective for a number of slots, among other examples.
  • the UE-specific signaling to assign the uplink slots among the first uplink carrier and the second uplink carrier may be based on a location of the UE within a cell associated with the base station.
  • the default slot pattern may be defined to improve performance for UEs located at or near the center of the cell associated with the base station, such as by assigning uplink slots to the primary uplink carrier that operates at a relatively higher frequency to enable uplink transmission at a higher data rate, and the UE-specific signaling may be provided to modify the default slot pattern to improve performance for UEs located near the edge of the cell, such as by reassigning one or more uplink slots to the secondary uplink carrier that operates at a relatively lower frequency to improve coverage at the cell edge.
  • the multiple candidate slot patterns may be defined for various locations within the cell, and the UE-specific signaling may indicate the particular candidate slot pattern to be activated based on the location of the UE in the cell.
  • the UE may provide a measurement report to the base station (such as on a periodic basis, based on a triggering event, or the like) , and the measurement report may include an RSRP value, an RSSI value, an RSRQ value, a CQI, or the like, which may enable the base station to estimate a location of the UE within the cell and determine the appropriate slot configuration for the UE based on the estimated location of the UE.
  • the base station may configure a default slot pattern to be applied on the primary uplink carrier.
  • the default slot pattern is a cell-specific (or cell-wide) configuration that applies to all UEs located in the cell associated with the base station, and which may be applied by the UE when the UE is located at the cell center.
  • the default slot pattern may be defined for cases in which the UE is located at the cell edge or another suitable location within the cell.
  • the primary uplink carrier may correspond to a TDD carrier that serves as an uplink and a downlink carrier
  • the secondary uplink carrier may correspond to an SUL carrier or an FDD uplink carrier that is paired with an FDD downlink carrier (the FDD downlink carrier is not illustrated for brevity)
  • each slot is the secondary uplink carrier is an uplink slot
  • each slot in the primary uplink carrier is either an uplink slot, a downlink slot, or a special (or switching) slot to enable the UE to switch from a downlink to an uplink.
  • the configuration of the multiple uplink carriers may vary in other cases, and the particular configuration illustrated in Figures 7B–7E are for illustration purposes only.
  • the multiple uplink carriers may include a first TDD carrier on a high-frequency band and a second TDD carrier on a low-frequency band.
  • the primary uplink carrier may correspond to the high-frequency band or the low-frequency band.
  • the secondary uplink carrier is an SUL carrier
  • one or more uplink carriers on a first RAT such as a 4G/LTE RAT
  • one or more uplink carriers on a second RAT such as a 5G/NR RAT
  • a dual connectivity mode such as EN-DC
  • the base station may generally configure the default slot pattern to be applied on the primary uplink carrier using higher-layer signaling, such as an RRC message. Additionally, or alternatively, the default slot pattern may be implicitly configured or otherwise determined based on a multi-carrier uplink mode in which the UE is configured to operate. As shown in Figure 7B, an example default slot pattern may be indicated as ‘DDDSUDDSUU’ to indicate that the first three slots are downlink slots, the fourth slot is a special slot to switch from the downlink to the uplink, the fifth slot is an uplink slot, the sixth and seventh slots are downlink slots, the eighth slot is another special slot to switch from the downlink to the uplink, and the final two slots are uplink slots.
  • the UE may receive the default slot configuration via the higher-layer signaling or determine the default slot configuration based on a multi-carrier uplink mode in which the UE is configured to operate, and the UE may use the default slot configuration to determine a slot pattern to be used for the primary uplink carrier and the secondary uplink carrier that are time division multiplexed with one another. For example, because uplink transmission can only be performed on one uplink carrier at a time in a time division multiplexing configuration, the UE may determine that uplink transmissions cannot be performed on the secondary uplink carrier during the fifth, ninth, or tenth slots based on the default slot pattern defining such slots as uplink slots on the primary uplink carrier. However, as mentioned above, in some cases performance for a UE may be improved by assigning uplink slots to the secondary uplink carrier, which may operate at a lower frequency and offer better coverage.
  • the UE-specific signaling may be used to switch uplink slots that are assigned to the primary carrier to the secondary uplink carrier (such as based on a measurement report indicating that the UE has moved closer to the cell edge) .
  • the fifth, ninth, and tenth slots that the default slot pattern indicated to be uplink slots on the primary uplink carrier may be switched to the secondary uplink carrier.
  • the base station may transmit additional UE-specific signaling to the UE to switch the slot pattern back to the default slot pattern (such as based on a measurement report indicating that the UE has moved closer to the cell center) .
  • the UE-specific signaling used to switch the uplink slots between the primary uplink carrier and the secondary uplink carrier may dynamically schedule an uplink transmission, and the switching may be applicable to a slot in which the uplink transmission is scheduled, applicable for a number of slots, or applicable until further UE-specific signaling is received, among other examples. Additionally, or alternatively, in cases where the base station determines that the UE is in a location that corresponds to a location for which the default slot pattern was configured (such as the cell center) , the base station may not transmit any UE-specific signaling to the UE, in which case the UE may follow the default slot pattern.
  • the base station may configure multiple candidate slot patterns, each of which may define a joint slot pattern to be applied on the primary uplink carrier and the secondary uplink carrier.
  • the candidate slot patterns include a cell center slot pattern and a cell edge slot pattern that applies to all UEs located in the cell associated with the base station.
  • the multiple candidate slot patterns may include additional slot patterns for other regions, areas, or other suitable locations within the cell associated with the base station (such as an inner region, an outer region, an area that may have poor coverage on higher frequencies due to the presence of obstacles, or the like) .
  • the multiple candidate slot patterns may depend on a multi-carrier uplink mode in which the UE is configured to operate (such as an SUL mode, an inter-band carrier aggregation mode, or an EN-DC mode, among other examples) .
  • a multi-carrier uplink mode in which the UE is configured to operate such as an SUL mode, an inter-band carrier aggregation mode, or an EN-DC mode, among other examples
  • the primary uplink carrier may correspond to a TDD carrier that serves as an uplink and a downlink carrier
  • the secondary uplink carrier may correspond to an SUL carrier or an FDD uplink carrier that is paired with an FDD downlink carrier.
  • each slot is the secondary uplink carrier is an uplink slot
  • each slot in the primary uplink carrier is either an uplink slot, a downlink slot, or a special (or switching) slot to enable the UE to switch from a downlink to an uplink.
  • the base station may configure the multiple candidate slot patterns to jointly indicate an assignment of uplink slots among the primary uplink carrier and the secondary uplink carrier using higher-layer signaling, such as an RRC message.
  • the cell center slot pattern may be indicated as ‘DDDSUDDSUU’ to indicate that the first three slots are downlink slots, the fourth slot is a special slot to switch from the downlink to the uplink, the fifth slot is an uplink slot, the sixth and seventh slots are downlink slots, the eighth slot is another special slot to switch from the downlink to the uplink, and the final two slots are uplink slots.
  • the cell edge slot pattern may be indicated as ‘DDDSU low DDSU low U low ’ to indicate that the three uplink slots are assigned to the low-frequency SUL or FDD UL carrier.
  • the UE may receive information indicating or otherwise configuring the multiple candidate slot patterns, or the UE may determine the multiple candidate slot patterns based on a multi-carrier uplink mode in which the UE is operating, and the UE may subsequently receive UE-specific signaling (such as via an RRC message, a MAC-CE, DCI, or the like) to activate a particular one of the multiple candidate slot patterns (such as in a slot in which the UE-specific signaling schedules an uplink transmission) .
  • the UE may activate one of the multiple candidate slot patterns indicated in the UE-specific signaling (such as based on a measurement report indicating a location of the UE within the cell) .
  • the UE may map an indicator contained in the UE-specific signaling to a corresponding slot configuration.
  • the UE-specific signaling may include a one-bit indicator to indicate whether all uplink slots in a default (or cell center) slot configuration are to be assigned to the high-frequency TDD uplink carrier or to the lower-frequency SUL or FDD UL carrier (such as a ‘0’ to indicate that all uplink slots in the default or cell center slot configuration are to be assigned to the high-frequency TDD uplink carrier or an uplink carrier associated with a first RAT, or a ‘1’ to indicate that all uplink slots in the default or cell center slot configuration are to be assigned to the lower-frequency SUL or FDD uplink carrier or an uplink carrier associated with a second RAT) .
  • a multi-bit indicator may be used to switch among different slot patterns or to activate a particular slot pattern (such as a two-bit indicator to identify a particular slot pattern among up to four different slot patterns, a three-bit indicator to identify a particular slot pattern among up to eight different slot patterns, and so on) .
  • a particular slot pattern such as a two-bit indicator to identify a particular slot pattern among up to four different slot patterns, a three-bit indicator to identify a particular slot pattern among up to eight different slot patterns, and so on.
  • the default or cell center pattern may be associated with a ‘00’ indicator
  • the cell edge pattern may be associated with a ‘11’ indicator.
  • additional slot patterns are configured for an inner region and an outer region of the cell (although such slot patterns may be associated with other suitable regions or characteristics associated with the cell) .
  • the inner region pattern assigns uplink slots in the first half of the default or cell center pattern to the high-frequency TDD uplink carrier, assigns uplink slots in the second half of the default or cell center pattern to the lower-frequency SUL or FDD UL carrier, and the inner region pattern may be identified with a ‘01’ indicator.
  • the outer region pattern assigns uplink slots in the first half of the default or cell center pattern to the lower-frequency SUL or FDD UL carrier, assigns uplink slots in the second half of the default or cell center pattern to the high-frequency TDD uplink carrier, and the outer region pattern may be identified with a ‘10’ indicator.
  • the UE-specific signaling may include a bitmap of size N to indicate an assignment of uplink slots among the primary uplink carrier and the secondary uplink carrier, where N is a quantity of uplink slots in the default or cell center slot configuration.
  • each bit (b i ) in the bitmap may include a value of ‘0’ or ‘1’ , where a value of ‘0’ indicates that the i-th bit in the default or cell center configuration is on the higher-frequency uplink carrier or an uplink carrier associated with a first RAT (such as to enable transmission at a high data rate) and a value of ‘1’ indicates that the i-th bit in the default or cell center configuration is on the lower-frequency uplink carrier or an uplink carrier associated with a second RAT (such as to enable improved coverage) .
  • the default or cell center pattern may be associated with a bitmap of ‘000’ to indicate that all three uplink slots in the default or cell center pattern are assigned to the higher-frequency band.
  • the inner region pattern may be associated with a bitmap of ‘011’ to indicate that the first uplink slot in the default or cell center pattern is assigned to the higher-frequency band and the second and third uplink slots in the default or cell center pattern are assigned to the lower-frequency band.
  • the outer region pattern may be associated with a bitmap of ‘100’ to indicate that the first uplink slot in the default or cell center pattern is assigned to the lower-frequency band and the second and third uplink slots in the default or cell center pattern are assigned to the higher-frequency band
  • the cell edge pattern may be associated with a bitmap of ‘111’ to indicate that all three uplink slots in the default or cell center pattern are assigned to the lower-frequency band.
  • the base station may configure various possible slot patterns that can be used in the cell (such as in different regions of the cell) , or various possible slot patterns may be configured for different multi-carrier uplink modes, and the base station may include a sequence of bits in the UE-specific signaling to indicate the particular slot pattern that the UE is to apply on the primary uplink carrier and the secondary uplink carrier.
  • the UE-specific signaling may indicate that the particular slot pattern is applicable in a slot in which the UE-specific signaling schedules an uplink transmission, or the particular slot pattern indicated by the UE-specific signaling may be effective until further UE-specific signaling is provided, or for a number of slots, among other examples.
  • the UE can only perform an uplink transmission on one uplink carrier in a given symbol or slot in cases where multiple uplink carriers are time division multiplexed with one another.
  • different carriers may be associated with different subcarrier spacings, numerologies, or the like, whereby a duration of a slot may vary from one carrier to another.
  • different techniques can be used to define a correspondence among slots in different uplink carriers, which may affect whether there are any restrictions on the UE transmitting on the uplink at a given time.
  • simultaneous uplink transmission may be restricted at a slot level, where a slot in the secondary uplink carrier (such as a low-frequency SUL or FDD UL carrier, or an uplink carrier associated with a secondary RAT) cannot be used for uplink communication if the corresponding slot in the primary uplink carrier (such as a high-frequency TDD carrier, or an uplink carrier associated with a primary RAT) is an uplink slot.
  • the primary uplink carrier and the secondary uplink carrier may have different numerologies, which generally corresponds to a subcarrier spacing.
  • a single slot on a carrier with a subcarrier spacing of 15 kHz may correspond to two slots on another carrier with a subcarrier spacing of 30 kHz.
  • the primary uplink carrier in the high-frequency band may have a subcarrier spacing of 30 kHz and the secondary uplink carrier may have a subcarrier spacing of 15 kHz, whereby one slot on the high-frequency band corresponds to half of a slot on the low-frequency band. Accordingly, when simultaneous uplink transmission is restricted at the slot level, uplink transmission may be restricted during the entire slot in the secondary uplink carrier even the restricted slot only overlaps with the uplink slot in the primary uplink carrier for half of the slot.
  • a subcarrier spacing in the primary uplink carrier may be defined as kHz
  • the subcarrier spacing in the secondary uplink carrier may be defined as kHz.
  • a slot n in a first uplink carrier may generally correspond to slot and to slot in a second uplink carrier, whereby one slot on the first uplink carrier may correspond to two slots on the second uplink carrier if the first uplink carrier has a lower subcarrier spacing than the second uplink carrier.
  • simultaneous uplink transmission may be restricted at a symbol level, where transmission on the secondary uplink carrier may be restricted during only one or more symbols that correspond to an uplink slot on the primary uplink carrier. Accordingly, when simultaneous uplink transmission is restricted at the symbol level, the second half of the slot on the low-frequency band can be used for uplink transmission. In this way, efficiency or resource utilization is improved (such as enabling faster ACK/NACK uplink transmissions) , because the UE can transmit during a greater proportion of the available symbols in a given time period.
  • FIG. 8 is a diagram illustrating an example process 800 performed, for example, by a UE.
  • Example process 800 is an example where a UE, such as the UE 120, performs operations associated with semi-static slot configuration for time division multiplexed uplink carriers.
  • the process 800 may include determining a slot pattern to be used for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier (block 810) .
  • the UE such as using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280
  • the slot pattern includes a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier.
  • the process 800 may include transmitting information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier (block 820) .
  • the UE (such as using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252) may transmit information to a base station on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier, as described above.
  • the process 800 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes receiving first signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, and receiving second signaling to modify the default slot pattern to switch the one or more slots from being scheduled for uplink communication on the first uplink carrier to uplink communication on the second uplink carrier, where the slot pattern corresponds to the modified default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes receiving signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, and the slot pattern corresponds to the default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes receiving first signaling to indicate multiple candidate slot patterns, each candidate slot pattern including a joint slot configuration for the first uplink carrier and the second uplink carrier, and receiving second signaling to activate one of the multiple candidate slot patterns as the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes receiving first signaling to indicate one or more cell-specific slot patterns for each UE in a cell associated with the base station, and receiving second signaling that indicates the slot pattern that the particular UE is to use for the first uplink carrier and the second uplink carrier based at least in part on the one or more cell-specific slot patterns.
  • the first signaling includes a first RRC message and the second signaling includes one or more of a second RRC message, a MAC-CE, or DCI.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier may include receiving signaling to activate one of multiple candidate slot patterns that are associated with an uplink mode configured for the UE, where the uplink mode is a supplemental uplink mode, a carrier aggregation mode, or a dual connectivity mode.
  • the slot pattern is indicated in signaling dynamically scheduling an uplink transmission, and the signaling further indicates that the slot pattern is to be used in a slot in which the uplink transmission is scheduled.
  • the process 800 includes transmitting a measurement report to the base station, with the slot pattern to be used for the first uplink carrier and the second uplink carrier based at least in part on the measurement report.
  • the slot pattern is configured in signaling that includes one or more bits to indicate an assignment of the first set of uplink slots and the second set of uplink slots among the first uplink carrier and the second uplink carrier.
  • communication on the uplink is restricted on the second uplink carrier during one or more slots or symbols that correspond to the first set of uplink slots on the first uplink carrier.
  • Figure 8 shows example blocks of the process 800
  • the process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 8. Additionally, or alternatively, two or more of the blocks of the process 800 may be performed in parallel.
  • Figure 9 is a diagram illustrating an example process 900 performed, for example, by a BS.
  • Example process 900 is an example where a base station, such as the base station 110, performs operations associated with semi-static slot configuration for time division multiplexed uplink carriers.
  • the process 900 may include determining a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, the slot pattern including a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier (block 910) .
  • the base station (such as using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234) may determine a slot pattern that a UE is configured to use for a first uplink carrier and a second uplink carrier that are time division multiplexed with one another, as described above.
  • the slot pattern includes a first set of uplink slots on the first uplink carrier and a second set of uplink slots on the second uplink carrier.
  • the process 900 may include receiving information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier (block 920) .
  • the base station (such as using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240) may receive information transmitted by the UE on an uplink based at least in part on the slot pattern to be used for the first uplink carrier and the second uplink carrier, as described above.
  • the process 900 may include additional aspects, such as any single aspect or any combination of aspects described below or in connection with one or more other processes described elsewhere herein.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes transmitting first signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier and transmitting second signaling to modify the default slot pattern to switch the one or more slots from being scheduled for uplink communication on the first uplink carrier to uplink communication on the second uplink carrier, with the slot pattern corresponding to the modified default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes transmitting signaling to indicate a default slot pattern including one or more slots that are scheduled for uplink communication on the first uplink carrier, with the slot pattern corresponding to the default slot pattern.
  • determining the slot pattern for the first uplink carrier and the second uplink carrier includes transmitting first signaling to indicate multiple candidate slot patterns, each candidate slot pattern including a joint slot configuration for the first uplink carrier and the second uplink carrier, and transmitting second signaling to activate one of the multiple candidate slot patterns as the slot pattern to be used for the first uplink carrier and the second uplink carrier.
  • determining the slot pattern includes transmitting first signaling to indicate one or more cell-specific slot patterns for each UE in a cell associated with the base station, and transmitting second signaling that indicates the slot pattern that the particular UE is to use for the first uplink carrier and the second uplink carrier based at least in part on the one or more cell-specific slot patterns.
  • the first signaling includes a first RRC message and the second signaling includes one or more of a second RRC message, a MAC-CE, or DCI.
  • determining the slot pattern that the UE is to use for the first uplink carrier and the second uplink carrier includes transmitting, to the UE, signaling to activate one of multiple candidate slot patterns that are associated with an uplink mode configured for the UE, where the uplink mode is a supplemental uplink mode, a carrier aggregation mode, or a dual connectivity mode.
  • the process 900 includes transmitting, to the UE, information indicating the slot pattern in signaling dynamically scheduling an uplink transmission, where the signaling further indicates that the slot pattern is to be used in a slot in which the uplink transmission is scheduled.
  • the process 900 includes receiving a measurement report from the UE and determining the slot pattern to be used for the first uplink carrier and the second uplink carrier based at least in part on the measurement report.
  • the slot pattern is configured in signaling that includes one or more bits to indicate an assignment of the first set of uplink slots and the second set of uplink slots among the first uplink carrier and the second uplink carrier.
  • communication on the uplink is restricted on the second uplink carrier during one or more slots or symbols that correspond to the first set of uplink slots on the first uplink carrier.
  • Figure 9 shows example blocks of the process 900
  • the process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 9. Additionally, or alternatively, two or more of the blocks of the process 900 may be performed in parallel.
  • the term “component” is intended to be broadly construed as hardware, firmware, or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, or a combination of hardware and software.
  • the phrase “based on” is intended to be broadly construed to mean “based at least in part on. ”
  • satisfying a threshold may refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “at least one of: a, b, or c” is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c.
  • the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ”
  • the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ”
  • the terms “set” and “group” are intended to include one or more items (for example, related items, unrelated items, or a combination of related and unrelated items) , and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used.
  • the terms “has, ” “have, ” “having, ” and similar terms are intended to be open-ended terms.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) .
  • the hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single-or multi-chip processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein.
  • a general purpose processor may be a microprocessor, or, any conventional processor, controller, microcontroller, or state machine.
  • a processor also may be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • particular processes and methods may be performed by circuitry that is specific to a given function.
  • the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware, including the structures disclosed in this specification and their structural equivalents thereof, or in any combination thereof.
  • aspects of the subject matter described in this specification also can be implemented as one or more computer programs (such as one or more modules of computer program instructions) encoded on a computer storage media for execution by, or to control the operation of, a data processing apparatus.
  • Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program from one place to another.
  • a storage media may be any available media that may be accessed by a computer.
  • such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that may be used to store desired program code in the form of instructions or data structures and that may be accessed by a computer.
  • Disk and disc includes compact disc (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 should also be included within the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine readable medium and computer-readable medium, which may be incorporated into a computer program product.

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Abstract

La présente invention concerne des systèmes, des procédés et des appareils de configuration semi-statique de créneaux pour des porteuses de liaison montante multiplexées par répartition dans le temps. Le rendement de configuration d'un motif de créneaux à utiliser sur de multiples porteuses de liaison montante peut être amélioré en configurant un ou plusieurs motifs de créneaux spécifiques à une cellule pour chaque équipement d'utilisateur (UE) situé dans une cellule associée à une station de base et en utilisant une signalisation spécifique à l'UE pour modifier ou activer un motif de créneaux particulier spécifique à la cellule. Le fait de permettre à un UE de commuter entre des motifs de créneaux peut améliorer les performances de l'UE d'après un emplacement de l'UE à l'intérieur de la cellule, notamment en signalant à l'UE de fonctionner selon un premier motif de créneaux dans lequel des créneaux de liaison montante sont affectés à une bande de fréquences supérieure pour permettre des transmissions à un débit de données supérieur au centre de la cellule, ou selon un second motif de créneaux dans lequel des créneaux de liaison montante sont affectés à une bande de fréquences inférieure pour améliorer la couverture à un bord de la cellule.
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CN101197597A (zh) * 2006-12-04 2008-06-11 中兴通讯股份有限公司 多载频时分复用码分多址接入系统中的功控装置
WO2019101184A1 (fr) * 2017-11-25 2019-05-31 华为技术有限公司 Procédé et appareil de réception d'informations

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9357564B2 (en) * 2007-06-19 2016-05-31 Texas Instruments Incorporated Signaling of random access preamble parameters in wireless networks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101197597A (zh) * 2006-12-04 2008-06-11 中兴通讯股份有限公司 多载频时分复用码分多址接入系统中的功控装置
WO2019101184A1 (fr) * 2017-11-25 2019-05-31 华为技术有限公司 Procédé et appareil de réception d'informations

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Discussion on the remaining issues of LTE-NR DC and UL coexistence", 3GPP DRAFT; R1-1715429, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Nagoya, Japan; 20170918 - 20170921, 17 September 2017 (2017-09-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051338897 *
HUAWEI, HISILICON: "TDM of LTE and NR uplinks for LTE-NR dual connectivity", 3GPP DRAFT; R1-1712163, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20170821 - 20170825, 20 August 2017 (2017-08-20), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051314982 *

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