WO2023099142A1 - Valeur d'avance temporelle pour transmissions en liaison montante se chevauchant - Google Patents

Valeur d'avance temporelle pour transmissions en liaison montante se chevauchant Download PDF

Info

Publication number
WO2023099142A1
WO2023099142A1 PCT/EP2022/081398 EP2022081398W WO2023099142A1 WO 2023099142 A1 WO2023099142 A1 WO 2023099142A1 EP 2022081398 W EP2022081398 W EP 2022081398W WO 2023099142 A1 WO2023099142 A1 WO 2023099142A1
Authority
WO
WIPO (PCT)
Prior art keywords
timing advance
advance value
loop
uplink transmissions
value
Prior art date
Application number
PCT/EP2022/081398
Other languages
English (en)
Inventor
Keeth Saliya Jayasinghe LADDU
Matha DEGHEL
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2023099142A1 publication Critical patent/WO2023099142A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others

Definitions

  • the following exemplary embodiments relate to wireless communication.
  • a terminal device may apply a timing advance to adjust the timing of an uplink frame in order to have alignment with a downlink frame in the time domain.
  • a timing advance may be applied to adjust the timing of an uplink frame in order to have alignment with a downlink frame in the time domain.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to: determine a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmit at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • an apparatus comprising means for: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • a method comprising: determining, by a terminal device, a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting, by the terminal device, at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • a computer program product comprising program instructions which, when run on a computing apparatus, cause the computing apparatus to perform at least the following: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • a computer program comprising instructions for causing an apparatus to perform at least the following: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to: transmit, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receive, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • an apparatus comprising means for: transmitting, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a method comprising: transmitting, by a network element of a wireless communication network, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, by the network element, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a computer program comprising instructions for causing an apparatus to perform at least the following: transmitting, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a computer program product comprising program instructions which, when run on a computing apparatus, cause the computing apparatus to perform at least the following: transmitting, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmitting, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmitting, to a terminal device, one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time; and receiving, from the terminal device, at least two uplink transmissions overlapping at least partially in time.
  • a system comprising at least a terminal device and a network element of a wireless communication network.
  • the terminal device is configured to: determine a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from the network element; and transmit at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • the network element is configured to: receive the at least two uplink transmissions.
  • a system comprising at least a terminal device and a network element of a wireless communication network.
  • the terminal device comprises means for: determining a timing advance value based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from the network element; and transmitting at least two uplink transmissions based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • the network element comprises means for: receiving the at least two uplink transmissions.
  • FIG. 1 illustrates an exemplary embodiment of a cellular communication network
  • FIG. 2 illustrates timing advance
  • FIG. 3 illustrates simultaneous uplink transmission
  • FIGS. 4-5 illustrate signaling diagrams according to some exemplary embodiments
  • FIGS. 6-7 illustrate flow charts according to some exemplary embodiments
  • FIG. 8 illustrates different timing advances and simultaneous uplink transmission with a first timing advance value according to an exemplary embodiment
  • FIG. 9 shows an example illustrating the difference in uplink reception timing at two different transmission and reception points, when a single timing advance value is applied at the terminal device for simultaneous uplink transmission;
  • FIG. 10 illustrates an example of a terminal device operating with two different uplink transmission modes
  • FIGS. 11-12 illustrate apparatuses according to some exemplary embodiments.
  • exemplary embodiments will be described using, as an example of an access architecture to which the exemplary embodiments may be applied, a radio access architecture based on long term evolution advanced (LTE Advanced, LTE-A), new radio (NR, 5G), or beyond 5G, without restricting the exemplary embodiments to such an architecture, however. It is obvious for a person skilled in the art that the exemplary embodiments may also be applied to other kinds of communications networks having suitable means by adjusting parameters and procedures appropriately.
  • LTE Advanced long term evolution advanced
  • NR new radio
  • 5G new radio
  • UMTS universal mobile telecommunications system
  • UTRAN radio access network
  • LTE long term evolution
  • Wi-Fi wireless local area network
  • WiMAX wireless local area network
  • Bluetooth® personal communications services
  • PCS personal communications services
  • WCDMA wideband code division multiple access
  • UWB ultra- wideband
  • sensor networks mobile ad-hoc networks
  • IMS Internet Protocol multimedia subsystems
  • FIG. 1 depicts examples of simplified system architectures showing some elements and functional entities, all being logical units, whose implementation may differ from what is shown.
  • the connections shown in FIG. 1 are logical connections; the actual physical connections may be different. It is apparent to a person skilled in the art that the system may also comprise other functions and structures than those shown in FIG. 1.
  • FIG. 1 shows a part of an exemplifying radio access network.
  • FIG. 1 shows user devices 100 and 102 configured to be in a wireless connection on one or more communication channels in a cell with an access node (such as (e/g)NodeB) 104 providing the cell.
  • the physical link from a user device to a (e/g)NodeB may be called uplink or reverse link and the physical link from the (e/g)NodeB to the user device may be called downlink or forward link.
  • (e/g)NodeBs or their functionalities may be implemented by using any node, host, server or access point etc. entity suitable for such a usage.
  • a communication system may comprise more than one (e/g)NodeB, in which case the (e/g)NodeBs may also be configured to communicate with one another over links, wired or wireless, designed for the purpose. These links may be used for signaling purposes.
  • the (e/g)NodeB may be a computing device configured to control the radio resources of communication system it is coupled to.
  • the (e/g)NodeB may also be referred to as a base station, an access point or any other type of interfacing device including a relay station capable of operating in a wireless environment.
  • the (e/g)NodeB may include or be coupled to transceivers.
  • a connection may be provided to an antenna unit that establishes bi- directional radio links to user devices.
  • the antenna unit may comprise a plurality of antennas or antenna elements.
  • the (e/g)NodeB may further be connected to core network 110 (CN or next generation core NGC).
  • CN core network 110
  • the counterpart on the CN side may be a serving gateway (S-GW, routing and forwarding user data packets), packet data network gateway (P-GW) for providing connectivity of user devices (UEs) to external packet data networks, mobility management entity (MME), access and mobility management function (AMF), or location management function (LMF), etc.
  • S-GW serving gateway
  • P-GW packet data network gateway
  • MME mobility management entity
  • AMF access and mobility management function
  • LMF location management function
  • the user device also called UE, user equipment, user terminal, terminal device, etc.
  • UE user equipment
  • user terminal terminal device
  • any feature described herein with a user device may be implemented with a corresponding apparatus, such as a relay node.
  • a relay node may be a layer 3 relay (self-backhauling relay) towards the base station.
  • the self-backhauling relay node may also be called an integrated access and backhaul (IAB) node.
  • the IAB node may comprise two logical parts: a mobile termination (MT) part, which takes care of the backhaul link(s) (i.e., link(s) between IAB node and a donor node, also known as a parent node) and a distributed unit (DU) part, which takes care of the access link(s), i.e., child link(s) between the IAB node and UE(s), and/or between the IAB node and other IAB nodes (multi-hop scenario).
  • MT mobile termination
  • DU distributed unit
  • the user device may refer to a portable computing device that includes wireless mobile communication devices operating with or without a subscriber identification module (SIM), including, but not limited to, the following types of devices: a mobile station (mobile phone), smartphone, personal digital assistant (PDA), handset, device using a wireless modem (alarm or measurement device, etc.), laptop and/or touch screen computer, tablet, game console, notebook, and multimedia device.
  • SIM subscriber identification module
  • a user device may also be a nearly exclusive uplink only device, of which an example may be a camera or video camera loading images or video clips to a network.
  • a user device may also be a device having capability to operate in Internet of Things (loT) network which is a scenario in which objects may be provided with the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.
  • the user device may also utilize cloud.
  • a user device may comprise a small portable device with radio parts (such as a watch, earphones or eyeglasses) and the computation may be carried out in the cloud.
  • the user device (or in some exemplary embodiments a layer 3 relay node) may be configured to perform one or more of user equipment functionalities.
  • the user device may also be called a subscriber unit, mobile station, remote terminal, access terminal, user terminal, terminal device, or user equipment (UE) just to mention but a few names or apparatuses.
  • CPS cyber- physical system
  • ICT devices sensors, actuators, processors microcontrollers, etc.
  • Mobile cyber physical systems in which the physical system in question may have inherent mobility, are a subcategory of cyber-physical systems. Examples of mobile physical systems include mobile robotics and electronics transported by humans or animals.
  • apparatuses have been depicted as single entities, different units, processors and/or memory units (not all shown in FIG. 1) may be implemented.
  • 5G enables using multiple input - multiple output (MIMO) antennas, many more base stations or nodes than the LTE (a so-called small cell concept), including macro sites operating in co-operation with smaller stations and employing a variety of radio technologies depending on service needs, use cases and/or spectrum available.
  • 5G mobile communications may support a wide range of use cases and related applications including video streaming, augmented reality, different ways of data sharing and various forms of machine type applications (such as (massive) machine- type communications (mMTC), including vehicular safety, different sensors and real- time control.
  • 5G may be expected to have multiple radio interfaces, namely below 6GHz, cmWave and mmWave, and also being integrable with existing legacy radio access technologies, such as the LTE.
  • Integration with the LTE may be implemented, at least in the early phase, as a system, where macro coverage may be provided by the LTE, and 5G radio interface access may come from small cells by aggregation to the LTE.
  • 5G may support both inter-RAT operability (such as LTE-5G) and inter-Rl operability (inter-radio interface operability, such as below 6GHz - cmWave, below 6GHz - cmWave - mmWave).
  • inter-RAT operability such as LTE-5G
  • inter-Rl operability inter-radio interface operability, such as below 6GHz - cmWave, below 6GHz - cmWave - mmWave.
  • One of the concepts considered to be used in 5G networks may be network slicing in which multiple independent and dedicated virtual sub-networks (network instances) may be created within the substantially same infrastructure to run services that have different requirements on latency, reliability, throughput and mobility.
  • the current architecture in LTE networks may be fully distributed in the radio and fully centralized in the core network.
  • the low latency applications and services in 5G may need to bring the content close to the radio which leads to local break out and multi-access edge computing (MEC).
  • 5G may enable analytics and knowledge generation to occur at the source of the data. This approach may need leveraging resources that may not be continuously connected to a network such as laptops, smartphones, tablets and sensors.
  • MEC may provide a distributed computing environment for application and service hosting. It may also have the ability to store and process content in close proximity to cellular subscribers for faster response time.
  • Edge computing may cover a wide range of technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to-peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self-healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and/or latency critical), critical communications (autonomous vehicles, traffic safety, real-time analytics, time-critical control, healthcare applications).
  • technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to-peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self-healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and/or latency critical), critical communications
  • the communication system may also be able to communicate with other networks, such as a public switched telephone network or the Internet 112, or utilize services provided by them.
  • the communication network may also be able to support the usage of cloud services, for example at least part of core network operations may be carried out as a cloud service (this is depicted in FIG. 1 by “cloud” 114).
  • the communication system may also comprise a central control entity, or a like, providing facilities for networks of different operators to cooperate for example in spectrum sharing.
  • Edge cloud may be brought into radio access network (RAN) by utilizing network function virtualization (NFV) and software defined networking (SDN).
  • RAN radio access network
  • NFV network function virtualization
  • SDN software defined networking
  • edge cloud may mean access node operations to be carried out, at least partly, in a server, host or node operationally coupled to a remote radio head (RRH) or a radio unit (RU), or a base station comprising radio parts. It may also be possible that node operations will be distributed among a plurality of servers, nodes or hosts. Carrying out the RAN real-time functions at the RAN side (in a distributed unit, DU 104) and non-real time functions in a centralized manner (in a central unit, CU 108) may be enabled for example by application of cloudRAN architecture.
  • 5G (or new radio, NR) networks may be designed to support multiple hierarchies, where MEC servers may be placed between the core and the base station or nodeB (gNB). It should be appreciated that MEC may be applied in 4G networks as well.
  • 5G may also utilize non-terrestrial communication, for example satellite communication, to enhance or complement the coverage of 5G service, for example by providing backhauling.
  • Possible use cases may be providing service continuity for machine-to-machine (M2M) or Internet of Things (loT) devices or for passengers on board of vehicles, or ensuring service availability for critical communications, and future railway/maritime/aeronautical communications.
  • Satellite communication may utilize geostationary earth orbit (GEO) satellite systems, but also low earth orbit (LEO) satellite systems, in particular mega-constellations (systems in which hundreds of (nano) satellites are deployed). At least one satellite 106 in the mega-constellation may cover several satellite-enabled network entities that create on-ground cells.
  • the on- ground cells may be created through an on-ground relay node 104 or by a gNB located on-ground or in a satellite. It is obvious for a person skilled in the art that the depicted system is only an example of a part of a radio access system and in practice, the system may comprise a plurality of (e/g)NodeBs, the user device may have an access to a plurality of radio cells and the system may also comprise other apparatuses, such as physical layer relay nodes or other network elements, etc. At least one of the (e/g)NodeBs or may be a Home(e/g)nodeB.
  • the (e/g)nodeB or base station may also be split into: a radio unit (RU) comprising a radio transceiver (TRX), i.e., a transmitter (Tx) and a receiver (Rx); one or more distributed units (DUs) that may be used for the so-called Layer 1 (L1) processing and real-time Layer 2 (L2) processing; and a central unit (CU) (also known as a centralized unit) that may be used for non-real-time L2 and Layer 3 (L3) processing.
  • the CU may be connected to the one or more DUs for example by using an Fl interface.
  • the CU and DU together may also be referred to as baseband or a baseband unit (BBU).
  • BBU baseband unit
  • the CU and DU may also be comprised in a radio access point (RAP).
  • RAP radio access point
  • the CU may be defined as a logical node hosting higher layer protocols, such as radio resource control (RRC), service data adaptation protocol (SDAP) and/or packet data convergence protocol (PDCP), of the (e/g)nodeB or base station.
  • the DU may be defined as a logical node hosting radio link control (RLC), medium access control (MAC) and/or physical (PHY) layers of the (e/g)nodeB or base station.
  • the operation of the DU may be at least partly controlled by the CU.
  • the CU may comprise a control plane (CU-CP), which may be defined as a logical node hosting the RRC and the control plane part of the PDCP protocol of the CU for the (e / g)nodeB or base station.
  • the CU may further comprise a user plane (CU-UP), which may be defined as a logical node hosting the user plane part of the PDCP protocol and the SDAP protocol of the CU for the (e/g)node
  • Cloud computing platforms may also be used to run the CU and/or DU.
  • the CU may run in a cloud computing platform, which may be referred to as a virtualized CU (vCU).
  • vCU virtualized CU
  • vDU virtualized DU
  • the DU may use so-called bare metal solutions, for example application-specific integrated circuit (ASIC) or customer-specific standard product (CSSP) system-on-a-chip (SoC) solutions.
  • ASIC application-specific integrated circuit
  • CSSP customer-specific standard product
  • SoC system-on-a-chip
  • Radio cells may be macro cells (or umbrella cells) which may be large cells having a diameter of up to tens of kilometers, or smaller cells such as micro-, femto- or picocells.
  • the (e/g) N odeBs of FIG. 1 may provide any kind of these cells.
  • a cellular radio system may be implemented as a multilayer network including several kinds of cells. In multilayer networks, one access node may provide one kind of a cell or cells, and thus a plurality of (e/g)NodeBs may be needed to provide such a network structure.
  • a network which may be able to use “plug-and-play” (e/g)NodeBs may include, in addition to Home (e/g)NodeBs (H(e/g)nodeBs), a home node B gateway, or HNB-GW (not shown in FIG. 1).
  • HNB-GW HNB Gateway
  • HNB-GW which may be installed within an operator’s network, may aggregate traffic from a large number of HNBs back to a core network.
  • a UE that is far away from a transmission and reception point may encounter a larger propagation delay than another UE that is closer to the TRP. Due to the larger propagation delay, the uplink transmission of the more distant UE may need to be transmitted in advance as compared to the uplink transmission of the closer UE, so that the uplink transmissions arrive at the TRP at substantially the same time.
  • FIG. 2 illustrates the concept of timing advance.
  • a timing advance (TA) 200 is a negative offset at the UE between the start of a received downlink (DL) frame 201 and a transmitted uplink (UL) frame 202.
  • the timing advance can be used to take into account the propagation delay between the UE and the TRP. This offset may be used to ensure that the DL and UL frames are synchronized at the TRP (in the time domain).
  • the UE may adjust its uplink transmissions by sending uplink symbols in advance according to the amount of time defined by the timing advance.
  • TA adjustment In the current NR specifications, TA adjustment consists of two parts: 1) based on the network signaling of TA adjustment (e.g., a timing advance command) to the UE, and 2) autonomous UL transmit timing adjustment by the UE.
  • TA adjustment e.g., a timing advance command
  • autonomous UL transmit timing adjustment by the UE.
  • the UE may track its DL timing and adjust the UL transmit timing to be within a set threshold.
  • One or more timing advance loops corresponding to a TRP and/or UE antenna panel may control the timing of UL transmissions to the TRP and/or by the UE antenna panel by means of a regularly provided timing advance command (TAC) in a closed-loop manner in a TRP-specific manner.
  • TAC timing advance command
  • the control of UL transmission timing may be valid for example for time-division multiplexed (TDMed) UL transmissions for different TRPs.
  • the UE may adjust uplink timing for physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and/or sounding reference signal (SRS) transmissions on the serving cells in the TAG based on the received TAC and a fixed offset value N TA, offset .
  • a TAG may comprise one or more serving cells with the substantially same uplink TA and substantially same downlink timing reference cell.
  • a given TAG may comprise at least one serving cell with configured uplink.
  • the mapping of the serving cells to a TAG may be configured by RRC.
  • Downlink, uplink, and sidelink transmissions are organized into radio frames with a duration of 10 ms, wherein a given radio frame comprises ten subframes of 1 ms.
  • T TA is the calculated timing advance between uplink and downlink to be applied by the UE.
  • N TA is a timing advance value provided by the network (e.g., broadcast or provided in the TAC).
  • N TA, offset is a fixed offset value that may vary according to different frequency bands and subcarrier spacing.
  • T c is a basic time unit for NR, for example 0.509 ns.
  • RAR random-access response
  • MAC CE MAC control element
  • the timing correction may be calculated by the network based on a random-access preamble received from the UE.
  • the UE determines the timing advance value from two different MAC layer commands depending on the situation.
  • the UE applies the timing advance value that it extracts from the RAR.
  • the UE may apply the timing advance value that it extracts from a timing advance MAC CE, if the UE receives such a MAC CE.
  • TA estimation is done at the network based on one or more reference signals, such as a demodulation reference signal (DMRS) or SRS transmitted from the UE.
  • DMRS demodulation reference signal
  • the UE adjusts UL transmission timing based on RAR during the random-access procedure.
  • the UE adjusts UL transmission based on the MAC CE timing advance.
  • the timing advance command field may be, for example, 6 bits, which means 64 steps in total ranging from -32 to 32 T c in real timing. If T c is 0.509 ns, the range of the physical timing may be -16.3 ps to 16.3 ps with 15 kHz subcarrier spacing.
  • Two or more timing advance loops may be maintained for example via MAC CE. Different MAC CEs or any indication within the MAC CE (if a single MAC CE used) may indicate the TRP and/or UE antenna panel corresponding to a given TA loop in order to differentiate one TA loop from another.
  • FIG. 3 illustrates simultaneous (or parallel) multi-panel UL transmission.
  • a UE 300 transmits a first uplink transmission to a first TRP 304-1 via a first uplink beam 311.
  • the UE 300 transmits a second uplink transmission to a second TRP 304-2 via a second uplink beam 312, wherein the first uplink transmission and the second uplink transmission overlap at least partially in time.
  • more than two uplink transmissions may be transmitted substantially simultaneously to more than two TRPs.
  • the first uplink transmission and the second uplink transmission may be transmitted from different UE antenna panels.
  • the first uplink transmission may be transmitted from a first antenna panel of the UE 300
  • the second uplink transmission may be transmitted from a second antenna panel of the UE 300.
  • the first TRP 304-1 and the second TRP 304-2 may belong to a single access node 304 (e.g. gNB), or they may belong to different access nodes (e.g., gNBs).
  • a TRP may refer to any entity, for example a network node or a remote radio head (RRH), which is capable of transmitting and/or receiving a radio signal.
  • the UE 300 in FIG. 3 may correspond to the UE 100 in FIG. 1.
  • the access node 304 in FIG. 3 may correspond to the access node 104 in FIG. 1.
  • the access node 304 may also be referred to as a network element herein.
  • an uplink (UL) beam may also refer to spatial relation info, (separate) UL transmission configuration indicator (TCI) state, joint or common TCI state, spatial filter, power control information (or power control parameters set), antenna panel or panel identifier (ID), etc.
  • TRP may be identified by at least one of the following: an SRS resource set, a beam failure detection reference signal (BFD-RS) set, a subset or set of UL beams, a control resource set pool index (CORESETPoollndex) (if configured), and/or a physical cell identity (PCI).
  • a given UE antenna panel may be identified by a panel ID.
  • a given antenna panel may be identified or associated by at least one (DL) reference signal or by an UL beam.
  • simultaneous (or parallel) UL transmission schemes may be specified considering reliability aspects (e.g., PUCCH repetition, PUSCH repetition) and enabling uncoordinated UL transmissions expected in multi- DCI or multi-TRP operation (e.g., PUCCH/PUSCH, PUCCH/PUCCH, and other UL overlapping channels).
  • DCI is an abbreviation for downlink control information.
  • Simultaneous UL transmission may involve allowing substantially simultaneous or parallel PUCCH/PUSCH and PUSCH/PUCCH/SRS transmissions from two or more UE antenna panels (e.g., using different UL beams in FR2).
  • UEs may support at least two TA loops, when supporting multi-TRP schemes or inter-cell beam management (or inter-cell multi-TRP) in NR Rel-18 and beyond. From the UE implementation perspective, it may be easier to consider a scenario that uses two separate TAs, which are applied to time- division multiplexed (TDMed) UL transmissions at the UE. In such a scenario, the UE may switch from one UL transmission timing assumption to another UL transmission timing assumption with a certain delay (the delay may be at least associated with switching of timing modes), or without any delay.
  • TDMed time- division multiplexed
  • the transmission modes defined therein follow TDM operation, and just one TA may be assumed for the TDMed UL transmissions (i.e., there may be no possibility for simultaneous or parallel UL transmission in NR Rel-17). Extending such operations with two different UL timings may be a more reasonable assumption for UE implementations.
  • the UE may also support simultaneous UL transmissions in NR Rel-18 and beyond, there is a challenge in how the different TA loops can be used to derive a proper UL timing for the simultaneous UL transmission.
  • Some exemplary embodiments may provide a more practical approach for maintaining two different TA loops and applying timing assumptions for both simultaneous and TDMed UL transmissions.
  • the simultaneous (or parallel) UL transmissions may be in the substantially same serving cell(s) and/or bandwidth part, or they may be in different serving cells and/or bandwidth parts.
  • the simultaneous (or parallel) UL transmissions may be in the substantially same carrier or in different carriers (in the substantially same cell).
  • the simultaneous (or parallel) UL transmissions may be in the substantially same cell, or in cells having different physical cell identities (PCls). If at least one of the simultaneous (or parallel) UL transmissions is a physical random-access channel (PRACH) transmission, the term “simultaneous” (or “overlap” or “parallel”) may not mean that the PRACH transmission and the other UL transmission are overlapping in time.
  • PRACH physical random-access channel
  • UL transmissions may also be referred to as UL repetitions.
  • FIG. 4 illustrates a signaling diagram according to an exemplary embodiment, wherein the network may control when to use a single TA value for overlapping UL transmissions from a UE.
  • the UE maintains at least two different TA loops corresponding to at least two TRPs within a cell, cell group or TAG.
  • the UE may be configured to use two different TA values (that are derived by two different TA loops), when the UL transmissions are not overlapping in the time domain.
  • the UE may be further configured to use a single TA value, when the UL transmissions are overlapping at least partially in the time domain.
  • a network element e.g., gNB of a wireless communication network transmits 401, to a UE, a first indication indicating a first timing advance value for a first timing advance loop.
  • the first timing advance loop may be associated with a random-access response (RAR) transmitted from the network element to the UE.
  • the network element transmits 402, to the UE, a second indication indicating a second timing advance value for a second timing advance loop.
  • the second timing advance loop may be associated with one of the alternatives listed above for the first timing advance loop. For example, if the first timing advance loop is associated with the first TRP of the network element, then the second timing advance loop may be associated with the second TRP of the network element. As another example, if the first timing advance loop is associated with the first antenna panel of the UE, then the second timing advance loop may be associated with the second antenna panel of the UE.
  • the network element transmits 403, to the UE, a third indication comprising configuration information for determining the single timing advance value for uplink transmissions overlapping at least partially in time.
  • the third indication comprises instructions on howto determine the single timing advance value for uplink transmissions overlapping at least partially in time.
  • the third indication may be transmitted, for example, via RRC, DCI, or MAC CE.
  • the network element transmits 404, to the UE, a fourth indication indicating whether a single timing advance value is indicated and/or whether to use the single timing advance value for uplink transmissions overlapping at least partially in time (e.g., simultaneous or parallel UL transmissions).
  • the fourth indication may also indicate the single timing advance value.
  • the indication on whether to use the single timing advance value for overlapping UL transmissions may be an explicit indication signaled for example via DCI, MAC CE, and/or RRC, or it may be an implicit indication based on scheduling or indication of UL transmission resources for the UE.
  • the fourth indication may be indicated together with the third indication (e.g., in MAC CE or DCI), or the fourth indication may be indicated separately from the third indication.
  • the network may control when the UE is allowed to transmit with a single timing advance value in overlapping time-domain resources. For example, when the first TRP and the second TRP are used to receive UL transmissions from the UE, and the UE uses the first timing advance loop corresponding to the first TRP for UL transmission, controlling simultaneous UL transmission instances may be needed to facilitate the second TRP to use a proper UL reception timing for this UE, if that UL reception timing at the second TRP is different from the UL reception timing maintained by the second TRP for other UEs.
  • first indication “second indication”, “third indication”, and “fourth indication” are used to distinguish the indications, and they do not necessarily mean a specific order of the indications.
  • the UE determines 405 a (single) timing advance value based at least partly on at least one of: the first timing advance value of the first timing advance loop, the second timing advance value of the second timing advance loop, and/or one or more indications (e.g., the third indication and/or the fourth indication) received from the network element.
  • the UE may determine the (single) timing advance value according to the configuration information (instructions) comprised in the third indication, if the fourth indication indicates to use a single timing advance value for UL transmissions overlapping at least partially in time.
  • the UE may use two timing advance values for UL transmissions, or the UE may not expect to perform overlapping UL transmissions.
  • the UE may determine 405 the (single) timing advance value as the first timing advance value of the first timing advance loop.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way.
  • the UE may determine 405 the (single) timing advance value as a function (e.g., average, max, or min) of at least one of the first timing advance value and/or the second timing advance value.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way.
  • the UE may determine 404 the timing advance value as an average of the first timing advance value and the second timing advance value, or as a largest value among the first timing advance value and the second timing advance value, or as a smallest value among the first timing advance value and the second timing advance value.
  • the UE may determine 405 the (single) timing advance value as the timing advance value (considering the two TA loops) that results in an earlier uplink transmission frame timing compared to the other timing advance value.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way. For example, if the first timing advance value results in an earlier uplink transmission frame timing compared to the second timing advance value of the second timing advance loop, then the first timing advance value may be selected as the single TA value for the overlapping UL transmissions.
  • the UE may determine 405 the (single) timing advance value as the timing advance value (considering the two TA loops) that results in a later uplink transmission frame timing compared to the other timing advance value.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way. For example, if the first timing advance value results in a later uplink transmission frame timing compared to the second timing advance value of the second timing advance loop, then the first timing advance value may be selected as the single TA value for the overlapping UL transmissions.
  • the UE may determine 405 the (single) timing advance value as the timing advance value (considering the two TA loops) that corresponds to the uplink transmission that starts earlier in time than the other uplink transmission.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way. This option may be applied for partially overlapping uplink transmissions.
  • the first timing advance value of the first timing advance loop corresponds to an uplink transmission that starts earlier in time than an uplink transmission corresponding to the second timing advance value of the second timing advance loop
  • the first timing advance value may be selected as the (single) timing advance value for the partially overlapping UL transmissions.
  • the UE may determine 405 the (single) timing advance value as the timing advance value (considering the two TA loops) that corresponds to the uplink transmission that starts later in time than the other uplink transmission.
  • the third indication may comprise instructions indicating the UE to determine the single timing advance value in this way. This option may be applied for partially overlapping uplink transmissions.
  • the first timing advance value of the first timing advance loop corresponds to an uplink transmission that starts later in time than an uplink transmission corresponding to the second timing advance value of the second timing advance loop
  • the first timing advance value may be selected as the (single) timing advance value for the partially overlapping UL transmissions.
  • the UE transmits 406 at least two uplink transmissions based at least partly on the determined (single) timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • the UE may further adjust the second UL transmission timing towards the second TRP for example with an offset corresponding to the timing difference between the first timing advance value and the second timing advance value. For example, a first uplink transmission of the at least two uplink transmissions may be transmitted to the first TRP according to the determined (single) timing advance value.
  • a second uplink transmission of the at least two uplink transmissions may be transmitted to the second TRP according to an adjusted transmission timing associated with the second timing advance value of the second timing advance loop corresponding to the second TRP, wherein the adjusted transmission timing is obtained by adjusting the second timing advance value with an offset value, such that the adjusted transmission timing corresponds to a transmission timing indicated by the determined (single) timing advance value.
  • first TRP and second TRP are used to distinguish the TRPs, and they may not necessarily mean a specific order or specific indices of the TRPs.
  • FIG. 5 illustrates a signaling diagram according to another exemplary embodiment.
  • the UE when the UE uses a single TA value for simultaneous UL transmission, the UE may be expected to receive or apply TA updates corresponding to the TA loop that is associated (or corresponding to) to the single TA value. Any TA updates received on the other TA loop may be discarded by the UE, or they may be considered to update the TA loop but not applied to the corresponding UL (simultaneous) transmission.
  • a UE determines 501, based on a first timing advance value of a first timing advance loop, a (single) timing advance value to be used for uplink transmissions overlapping at least partially in time.
  • the (single) timing advance value may correspond to the first timing advance value of the first timing advance loop.
  • a network element of a wireless communication network indicates 502, to the UE, an updated first timing advance value for the first timing advance loop.
  • the network element further indicates 503, to the UE, an updated second timing advance value for a second timing advance loop.
  • the UE updates 504, based on the updated first timing advance value, the (single) timing advance value to be used for uplink transmissions overlapping at least partially in time.
  • the UE may discard 505, or ignore, the updated second timing advance value for the second timing advance loop.
  • the updated second timing advance value for the second timing advance loop may not be applied to uplink transmissions overlapping at least partially in time.
  • the UE transmits 506 at least two uplink transmissions based at least partly on the updated (single) timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • FIG. 6 illustrates a flow chart according to an exemplary embodiment.
  • the steps illustrated in FIG. 6 may be performed by an apparatus such as, or comprised in, a terminal device.
  • the terminal device may also be referred to as a user device, user equipment, or UE herein.
  • a timing advance value is determined 601 based at least partly on at least one of: a first timing advance value of a first timing advance loop, a second timing advance value of a second timing advance loop, and/or one or more indications received from a network element of a wireless communication network.
  • At least two uplink transmissions are transmitted 602 based at least partly on the determined timing advance value, wherein the at least two uplink transmissions overlap at least partially in time.
  • FIG. 7 illustrates a flow chart according to an exemplary embodiment. The steps illustrated in FIG. 7 may be performed by an apparatus such as, or comprised in, a network element of a wireless communication network.
  • one or more indications indicating a timing advance value for uplink transmissions overlapping at least partially in time are transmitted 701 to a terminal device.
  • At least two uplink transmissions overlapping at least partially in time are received 702 from the terminal device, wherein the timing of the at least two uplink transmissions correspond to the timing advance value indicated to the terminal device.
  • a first uplink transmission of the at least two uplink transmissions may be received via a first transmission and reception point of the apparatus, and a second uplink transmission of the at least two uplink transmission may be received via a second transmission and reception point of the apparatus.
  • FIG. 8 illustrates different timing advances and simultaneous UL transmission with a first timing advance value (TA #1) according to an exemplary embodiment.
  • FIG. 8 shows an example of two TRPs (TRP1 and TRP2) having different propagation delays towards the UE.
  • the UE maintains two TA loops to derive different UL transmission timing (e.g., for TDMed UL transmissions towards the TRPs).
  • a first TA loop may correspond to the first TRP (TRP1)
  • a second TA loop may correspond to the second TRP (TRP2).
  • TRP1 and TRP2 DL Tx timing are assumed to be aligned (synchronized).
  • the UE may determine a single TA value for simultaneous UL transmission.
  • the single TA value is shown as TA#1 in FIG. 8.
  • the TA used towards TRP2 (or used at an antenna panel corresponding to TRP2) may be adjusted as shown in FIG. 8.
  • FIG. 9 illustrates having different Rx timing at TRPs according to an exemplary embodiment.
  • FIG. 9 shows an example illustrating the difference in UL Rx timing at two different TRPs, when a single TA value is applied at the UE for simultaneous UL transmissions.
  • the UE uses a single TA value (TA #1) corresponding to TRP1
  • the UL Rx of the UE at TRP1 may be aligned with the other UE UL Rx timing at TRP1 (FIG. 9 also assumes aligned UL/DL frames at the TRP1).
  • TRP2 may have to maintain a different UL Rx timing for this particular UE, which is in simultaneous UL transmission by using a TA value corresponding to a different TRP (TRP1) .
  • TRP1 TRP1
  • the network may control when the UE is allowed to transmit with a single TA value.
  • FIG. 10 shows an example illustration of a UE operating with two different UL transmission modes (TDMed UL and simultaneous UL), and TA updates are received corresponding to two TA loops over time.
  • TDMed UL and simultaneous UL UL transmission modes
  • TA updates are received corresponding to two TA loops over time.
  • some exemplary embodiments e.g., the exemplary embodiment described with reference to FIG. 5 may enable the UE to avoid updating the TA for at least one TA loop, when the UE applies simultaneous UL transmissions that uses a TA value from a different TA loop (or any other TA value).
  • a technical advantage provided by some exemplary embodiments is that they may reduce UE complexity, when handling simultaneous or parallel uplink transmissions. As the UE does not have to use two different timing advance values when transmitting two simultaneous UL transmissions, maintaining a single set of components or sharing a single transmitter chain (at least certain aspects) may become feasible at the UE side. Some exemplary embodiments also allow using two TA loops, whenever TDMed uplink transmissions are applied by the UE. Some exemplary embodiments also allow controlling the reception timing at the TRPs, where the network may control when to consider a different reception timing at a given TRP with better flexibility than uncontrolled UE parallel transmissions, which may result in different reception timings at the TRPs. Controlling the transmission instances by the network and the applied timing advance may also ease interference handling at different network nodes.
  • FIG. 11 illustrates an apparatus 1100, which may be an apparatus such as, or comprised in, a terminal device, according to an exemplary embodiment.
  • the terminal device may also be referred to as a UE or user equipment herein.
  • the apparatus 1100 comprises a processor 1110.
  • the processor 1110 interprets computer program instructions and processes data.
  • the processor 1110 may comprise one or more programmable processors.
  • the processor 1110 may comprise programmable hardware with embedded firmware and may, alternatively or additionally, comprise one or more application-specific integrated circuits (ASICs).
  • ASICs application-specific integrated circuits
  • the processor 1110 is coupled to a memory 1120.
  • the processor is configured to read and write data to and from the memory 1120.
  • the memory 1120 may comprise one or more memory units.
  • the memory units may be volatile or non- volatile. It is to be noted that in some exemplary embodiments there may be one or more units of non-volatile memory and one or more units of volatile memory or, alternatively, one or more units of non-volatile memory, or, alternatively, one or more units of volatile memory.
  • Volatile memory may be for example random-access memory (RAM), dynamic random-access memory (DRAM) or synchronous dynamic random- access memory (SDRAM).
  • Non-volatile memory may be for example read-only memory (ROM), programmable read-only memory (PROM), electronically erasable programmable read-only memory (EEPROM), flash memory, optical storage or magnetic storage.
  • ROM read-only memory
  • PROM programmable read-only memory
  • EEPROM electronically erasable programmable read-only memory
  • flash memory optical storage or magnetic storage.
  • memories may be referred to as non-transitory computer readable media.
  • the memory 1120 stores computer readable instructions that are executed by the processor 1110.
  • non-volatile memory stores the computer readable instructions and the processor 1110 executes the instructions using volatile memory for temporary storage of data and/or instructions.
  • the computer readable instructions may have been pre-stored to the memory 1120 or, alternatively or additionally, they may be received, by the apparatus, via an electromagnetic carrier signal and/or may be copied from a physical entity such as a computer program product. Execution of the computer readable instructions causes the apparatus 1100 to perform one or more of the functionalities described above.
  • a “memory” or “computer-readable media” or “computer-readable medium” may be any non-transitory media or medium or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • the apparatus 1100 may further comprise, or be connected to, an input unit 1130.
  • the input unit 1130 may comprise one or more interfaces for receiving input.
  • the one or more interfaces may comprise for example one or more temperature, motion and/or orientation sensors, one or more cameras, one or more accelerometers, one or more microphones, one or more buttons and/or one or more touch detection units.
  • the input unit 1130 may comprise an interface to which external devices may connect to.
  • the apparatus 1100 may also comprise an output unit 1140.
  • the output unit may comprise or be connected to one or more displays capable of rendering visual content, such as a light emitting diode (LED) display, a liquid crystal display (LCD) and/or a liquid crystal on silicon (LCoS) display.
  • the output unit 1140 may further comprise one or more audio outputs.
  • the one or more audio outputs may be for example loudspeakers.
  • the apparatus 1100 further comprises a connectivity unit 1150.
  • the connectivity unit 1150 enables wireless connectivity to one or more external devices.
  • the connectivity unit 1150 comprises at least one transmitter and at least one receiver that may be integrated to the apparatus 1100 or that the apparatus 1100 may be connected to.
  • the at least one transmitter comprises at least one transmission antenna, and the at least one receiver comprises at least one receiving antenna.
  • the connectivity unit 1150 may comprise an integrated circuit or a set of integrated circuits that provide the wireless communication capability for the apparatus 1100.
  • the wireless connectivity may be a hardwired application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • the connectivity unit 1150 may comprise one or more components such as a power amplifier, digital front end (DFE), analog-to-digital converter (ADC), digital-to- analog converter (DAC), frequency converter, (de) modulator, and/or encoder/decoder circuitries, controlled by the corresponding controlling units.
  • DFE digital front end
  • ADC analog-to-digital converter
  • DAC digital-to- analog converter
  • de demodulator
  • encoder/decoder circuitries controlled by the corresponding controlling units.
  • apparatus 1100 may further comprise various components not illustrated in FIG. 11.
  • the various components may be hardware components and/or software components.
  • the apparatus 1200 of FIG. 12 illustrates an exemplary embodiment of an apparatus such as, or comprised in, a network element of a wireless communication network.
  • the network element may also be referred to, for example, as a network node, a RAN node, an integrated access and backhaul (LAB) node, an IAB donor node, a NodeB, an LTE evolved NodeB (eNB), a gNB, a base station, an NR base station, a 5G base station, an access node, an access point (AP), a distributed unit (DU), a central unit (CU), a baseband unit (BBU), a radio unit (RU), a radio head, a remote radio head (RRH), or a transmission and reception point (TRP).
  • a network node a RAN node, an integrated access and backhaul (LAB) node, an IAB donor node, a NodeB, an LTE evolved NodeB (eNB), a gNB, a base station,
  • the apparatus 1200 may comprise, for example, a circuitry or a chipset applicable for realizing some of the described exemplary embodiments.
  • the apparatus 1200 may be an electronic device comprising one or more electronic circuitries.
  • the apparatus 1200 may comprise a communication control circuitry 1210 such as at least one processor, and at least one memory 1220 including a computer program code (software) 1222 wherein the at least one memory and the computer program code (software) 1222 are configured, with the at least one processor, to cause the apparatus 1200 to carry out some of the exemplary embodiments described above.
  • the processor is coupled to the memory 1220.
  • the processor is configured to read and write data to and from the memory 1220.
  • the memory 1220 may comprise one or more memory units.
  • the memory units may be volatile or non-volatile. It is to be noted that in some exemplary embodiments there may be one or more units of non- volatile memory and one or more units of volatile memory or, alternatively, one or more units of non-volatile memory, or, alternatively, one or more units of volatile memory.
  • Volatile memory may be for example random-access memory (RAM), dynamic random-access memory (DRAM) or synchronous dynamic random-access memory (SDRAM).
  • Non-volatile memory may be for example read-only memory (ROM), programmable read-only memory (PROM), electronically erasable programmable read-only memory (EEPROM), flash memory, optical storage or magnetic storage.
  • ROM read-only memory
  • PROM programmable read-only memory
  • EEPROM electronically erasable programmable read-only memory
  • flash memory optical storage or magnetic storage.
  • memories may be referred to as non-transitory computer readable media.
  • the memory 1220 stores computer readable instructions that are executed by the processor.
  • non-volatile memory stores the computer readable instructions and the processor executes the instructions using volatile memory for temporary storage of data and/or instructions.
  • the computer readable instructions may have been pre-stored to the memory 1220 or, alternatively or additionally, they may be received, by the apparatus, via an electromagnetic carrier signal and/or may be copied from a physical entity such as a computer program product. Execution of the computer readable instructions causes the apparatus 1200 to perform one or more of the functionalities described above.
  • the memory 1220 may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and/or removable memory.
  • the memory may comprise a configuration database for storing configuration data.
  • the configuration database may store a current neighbour cell list, and, in some exemplary embodiments, structures of the frames used in the detected neighbour cells.
  • the apparatus 1200 may further comprise a communication interface 1230 comprising hardware and/or software for realizing communication connectivity according to one or more communication protocols.
  • the communication interface 1230 comprises at least one transmitter (Tx) and at least one receiver (Rx) that may be integrated to the apparatus 1200 or that the apparatus 1200 may be connected to.
  • the communication interface 1230 provides the apparatus with radio communication capabilities to communicate in the cellular communication system.
  • the communication interface may, for example, provide a radio interface to terminal devices.
  • the apparatus 1200 may further comprise another interface towards a core network such as the network coordinator apparatus and/or to the access nodes of the cellular communication system.
  • the apparatus 1200 may further comprise a scheduler 1240 that is configured to allocate resources.
  • circuitry may refer to one or more or all of the following: a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry); and b) combinations of hardware circuits and software, such as (as applicable): i) a combination of analog and/or digital hardware circuit(s) with software/firmware and ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone, to perform various functions); and c) hardware circuit(s) and/or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (for example firmware) for operation, but the software may not be present when it is not needed for operation.
  • hardware-only circuit implementations such as implementations in only analog and/or digital circuitry
  • combinations of hardware circuits and software such as (as applicable): i) a combination of analog and/or digital hardware circuit(s) with software/
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the techniques and methods described herein may be implemented by various means. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or combinations thereof.
  • the apparatus(es) of exemplary embodiments may be implemented within one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), graphics processing units (GPUs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
  • ASICs application-specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • GPUs graphics processing units
  • processors controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a
  • the implementation can be carried out through modules of at least one chipset (for example procedures, functions, and so on) that perform the functions described herein.
  • the software codes may be stored in a memory unit and executed by processors.
  • the memory unit may be implemented within the processor or externally to the processor. In the latter case, it can be communicatively coupled to the processor via various means, as is known in the art.
  • the components of the systems described herein may be rearranged and/or complemented by additional components in order to facilitate the achievements of the various aspects, etc., described with regard thereto, and they are not limited to the precise configurations set forth in the given figures, as will be appreciated by one skilled in the art.
  • ADC analog-to-digital converter
  • ASIC application-specific integrated circuit
  • BBU baseband unit
  • BFD-RS beam failure detection reference signal
  • CN core network
  • CU-CP central unit control plane
  • CU-UP central unit user plane
  • DAC digital-to-analog converter
  • DCI downlink control information
  • DFE digital front end
  • DRAM dynamic random-access memory
  • DSP digital signal processor
  • EEPROM electronically erasable programmable read-only memory
  • FPGA field programmable gate array
  • GEO geostationary earth orbit
  • gNB next generation nodeB / 5G base station
  • GPU graphics processing unit
  • HNB-GW home node B gateway IAB: integrated access and backhaul ID: identifier
  • IMS internet protocol multimedia subsystem loT: internet of things
  • LCD liquid crystal display
  • MAC CE medium access control control element
  • MANET mobile ad-hod network
  • MEC multi-access edge computing
  • MIMO multiple input and multiple output
  • MME mobility management entity
  • mMTC massive machine-type communications
  • MT mobile termination
  • PCS personal communications services
  • PDA personal digital assistant
  • PDCP packet data convergence protocol
  • P-GW packet data network gateway
  • PLD programmable logic device
  • PRACH physical random-access channel
  • PROM programmable read-only memory
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel RAM: random-access memory
  • RAN radio access network
  • RAP radio access point
  • ROM read-only memory
  • RRC radio resource control
  • RRH remote radio head
  • SDAP service data adaptation protocol
  • SDRAM synchronous dynamic random-access memory
  • S-GW serving gateway
  • SIM subscriber identification module
  • SoC system-on-a-chip
  • TAG timing advance group
  • TCI transmission configuration indicator
  • TDM time-division multiplexing
  • TRP transmission and reception point
  • UE user equipment / terminal device
  • UMTS universal mobile telecommunications system
  • UTRAN UMTS radio access network
  • UWB ultra-wideband vCU: virtualized central unit
  • vDU virtualized distributed unit
  • WCDMA wideband code division multiple access
  • WiMAX worldwide interoperability for microwave access
  • WLAN wireless local area network

Landscapes

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

Abstract

L'invention concerne un procédé comprenant la détermination d'une valeur d'avance temporelle sur la base, au moins partiellement, d'au moins un élément parmi : une première valeur d'avance temporelle d'une première boucle d'avance temporelle, une seconde valeur d'avance temporelle d'une seconde boucle d'avance temporelle, et/ou une ou plusieurs indications reçues d'un élément de réseau d'un réseau de communication sans fil ; et l'émission d'au moins deux transmissions en liaison montante (UL) sur la base, au moins partiellement, de la valeur d'avance temporelle déterminée, lesdites au moins deux transmissions en liaison montante se chevauchant au moins partiellement dans le temps.
PCT/EP2022/081398 2021-12-01 2022-11-10 Valeur d'avance temporelle pour transmissions en liaison montante se chevauchant WO2023099142A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20216234A FI20216234A1 (en) 2021-12-01 2021-12-01 Timing preset for duplicate uplink transmissions
FI20216234 2021-12-01

Publications (1)

Publication Number Publication Date
WO2023099142A1 true WO2023099142A1 (fr) 2023-06-08

Family

ID=84365277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/081398 WO2023099142A1 (fr) 2021-12-01 2022-11-10 Valeur d'avance temporelle pour transmissions en liaison montante se chevauchant

Country Status (2)

Country Link
FI (1) FI20216234A1 (fr)
WO (1) WO2023099142A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150333879A1 (en) * 2011-12-20 2015-11-19 Lg Electronics Inc. Method and apparatus for acquiring uplink synchronization in wireless communication system
US20200053752A1 (en) * 2018-08-10 2020-02-13 Qualcomm Incorporated Multiple timing advance design for multiple transmit receive points
US20210321355A1 (en) * 2018-08-03 2021-10-14 Nec Corporation Timing adjustment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150333879A1 (en) * 2011-12-20 2015-11-19 Lg Electronics Inc. Method and apparatus for acquiring uplink synchronization in wireless communication system
US20210321355A1 (en) * 2018-08-03 2021-10-14 Nec Corporation Timing adjustment
US20200053752A1 (en) * 2018-08-10 2020-02-13 Qualcomm Incorporated Multiple timing advance design for multiple transmit receive points

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL: "Considerations on multi-panel based uplink transmission", vol. RAN WG1, no. Athens, Greece; 20170213 - 20170217, 12 February 2017 (2017-02-12), XP051208856, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN1/Docs/> [retrieved on 20170212] *

Also Published As

Publication number Publication date
FI20216234A1 (en) 2023-06-02

Similar Documents

Publication Publication Date Title
US11974242B2 (en) Neighbour cell measuring
WO2024018117A1 (fr) Temporisateurs d&#39;alignement temporel multiples
US11627552B1 (en) Offset value for paging early indication
US20240049091A1 (en) Determining handover command transmission based on survival time
WO2023099142A1 (fr) Valeur d&#39;avance temporelle pour transmissions en liaison montante se chevauchant
US20240155508A1 (en) Power headroom report
FI129915B (en) Starting a small data transmission based on one or more conditions specific to the device type
WO2023011731A1 (fr) Indication de transmission de préambule après un commutateur de faisceau
US20240179548A1 (en) Indicating beam failure in multiple transmission reception point operation
WO2023158419A1 (fr) Commande basée sur la synchronisation pour une mesure relaxée
US20240056990A1 (en) Assigning power control parameters for multiple transmission reception point operation
WO2023186265A1 (fr) Transfert de session de positionnement de liaison latérale
WO2023110089A1 (fr) Évitement de conflit pour signal de référence
WO2023131451A1 (fr) Configuration d&#39;un signal de référence de positionnement de liaison montante
EP4335152A1 (fr) Procédés pour des interruptions semi-flexibles et partage des interruptions
CA3228990A1 (fr) Declenchement de retablissement apres defaillance de faisceau lors de l&#39;activation d&#39;un groupe de cellules secondaires
WO2024068131A1 (fr) Accès retardé à une cellule primaire d&#39;un groupe de cellules secondaires
WO2023151838A1 (fr) Procédé et appareil de prise en charge d&#39;antennes multiples
WO2023174519A1 (fr) Recherche de cellule
WO2023052014A1 (fr) Indication de changements de synchronisation de transmission
WO2024094367A1 (fr) Valeurs de décalage d&#39;initialisation de séquence de signal de référence de démodulation
WO2024094364A1 (fr) Valeurs de décalage d&#39;initialisation de séquence de signaux de référence de démodulation
WO2023198274A1 (fr) Configuration de ressources de signal de référence de liaison montante
EP4360358A1 (fr) Indication de fenêtre de temps pour transfert intercellulaire conditionnel
WO2023012403A1 (fr) Réglage de temporisateur de synchronisation de liaison montante

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22814093

Country of ref document: EP

Kind code of ref document: A1