WO2021064135A1 - Dispositifs utilisateur pour un système de communication sans fil et procédés de communication dans un système de communication sans fil - Google Patents

Dispositifs utilisateur pour un système de communication sans fil et procédés de communication dans un système de communication sans fil Download PDF

Info

Publication number
WO2021064135A1
WO2021064135A1 PCT/EP2020/077584 EP2020077584W WO2021064135A1 WO 2021064135 A1 WO2021064135 A1 WO 2021064135A1 EP 2020077584 W EP2020077584 W EP 2020077584W WO 2021064135 A1 WO2021064135 A1 WO 2021064135A1
Authority
WO
WIPO (PCT)
Prior art keywords
user device
information
aperiodic
transmission
traffic
Prior art date
Application number
PCT/EP2020/077584
Other languages
English (en)
Inventor
Dariush Mohammad Soleymani
Martin Leyh
Elke Roth-Mandutz
Shubhangi BHADAURIA
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO2021064135A1 publication Critical patent/WO2021064135A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • Embodiments of the present disclosure relate to user devices for a wireless communication system. Further embodiments relate to methods for wireless communication.
  • Some embodiments relate to LTE V2X sidelink operation, for example in mode 4. Some embodiments relate to a NR sidelink or to autonomous resource allocation for aperiodic traffic.
  • Wireless communication may be disturbed, if multiple contributors transmit information at the same time and using the same frequency subband.
  • radio resources defining a time slot and a frequency range, may be assigned to individual contributors for transmitting data.
  • the allocation of radio resources may be managed by the network controlling the wireless communication system.
  • sidelink communication that is direct communication between user devices (UEs)
  • UEs user devices
  • Selection of radio resources by user devices is particularly beneficial, if one or more of the user devices are out of coverage of the network.
  • LTE V2X sidelink mode 4
  • UE autonomous resource selection and reservation are used based on the channel sensing operations.
  • LTE V2X supports only periodic traffic in broadcast manner. For example, it has been found that in a channel sensing period, two methods are available: either a sensing UE measures received signal strength and excludes the resources that are above the configured threshold or decodes a SCI of sensed UE to acquire the information associated to the sensed UE, e.g. priority, resource configuration which can be used in resource exclusion and candidate resource selection procedure.
  • radio resources which provides an improved trade-off between a small signaling overhead (small size of control information to be transmitted between UEs and/or the network), a fast selection procedure for radio resources, a high accuracy in selecting suitable resources (e.g. unoccupied resources or resources with a low energy or power), e.g. in the presence of different traffic types such as periodic and/or aperiodic traffic, low computational effort for selecting the resources, and a low implementation effort.
  • a small signaling overhead small size of control information to be transmitted between UEs and/or the network
  • suitable resources e.g. unoccupied resources or resources with a low energy or power
  • traffic types such as periodic and/or aperiodic traffic
  • Embodiments of the inventive concepts may refer to user devices communicating with each other in a wireless communication system.
  • implementations of the inventive concepts may include features implemented on the transmitter side (e.g. a user device transmitting an information) or on the receiver side (e.g. a user device receiving the transmitted information) or on both sides.
  • functionalities and advantages of features described with respect to the transmitter side or the receiver side may equivalently or similarly apply to the corresponding features on the receiver side or the transmitter side respectively, although the description may not be explicitly repeated.
  • some of the described features may be implemented in multiple of the described concepts for communicating in a wireless communication system. Functionalities and advantages of a feature may apply described with respect to a specific aspect may equivalently or similarly apply to an implementation of the corresponding feature in the context of other aspects, although the description is not explicitly repeated.
  • a first inventive concept relies on the idea, that an overlap of transmissions from different user devices may be avoided, even in the case of aperiodic traffic, if a first user device transmits a first stage Sidelink Control Information (SCI) describing reserved resources for transmission of further information.
  • SCI Sidelink Control Information
  • a second user device may infer from the first stage SCI provided by the first user device, which resources are reserved for a further transmission by the first user device.
  • the first stage SCI comprises an information indicating whether a traffic type is periodic or aperiodic. As the information about the traffic type is available to the second user device, the second user device may select resources for a own transmission particularly efficiently.
  • the second user device may handle aperiodic traffic differently from periodic traffic in a prediction of occupied resources. Enabling the second user device to differentiate between periodic and aperiodic traffic, may therefore allow to announce aperiodic traffic on short notice. As a consequence, a short time delay before transmitting data via aperiodic traffic, e.g. a short time delay between transmitting the first stage SCI and the data to be transmitted, may be selected, while nevertheless ensuring a high reliability for a successful transmission of the data.
  • the further data transmitted by the first user device comprises a second stage SCI.
  • the first stage SCI may primary include information describing the resources for the further transmission, but does not necessarily comprise additional information about the further transmission, such as information about how to decode or demodulated the further transmission. Therefore, the size of the first stage SCI may be small. Having a small sized first stage SCI reduces the size of the occupied resources necessary for the first stage SCI, increasing the amount of available resources for data transmissions by further devices. Further, a small size of the first stage SCI decreases a probability that the first stage SCI overlaps with other transmissions, and thus increasing the probability, that the first stage SCI reaches the second user device.
  • Embodiments according to the first inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to transmit a first stage SCI describing reserved resources for transmission of further information comprising a second stage SCI, wherein the first stage SCI comprises an information (e.g. a traffic type identifier, or a periodicity parameter) indicating (e.g. implicitly or explicitly) whether a traffic type is periodic or aperiodic.
  • an information e.g. a traffic type identifier, or a periodicity parameter
  • the user device is to transmit data in a manner signaled by the first stage SCI and by the second stage SCI (wherein the first state SCI may, for example, describe a traffic type, and radio resources used for the transmission, and wherein the second stage SCI may, for example, describe further transmission parameters) (wherein, for example, all UEs are able to decode the information conveyed by 1st stage SCI).
  • the first stage SCI may be transmitted so that all user devices in the communication system may decode the first stage SCI.
  • splitting the information into the first stage SCI and the second stage SCI may keep the additional overhead for transmitting the information of the first stage SCI so that all user devices may decode the information of the first stage SCI small.
  • splitting the information into the first stage SCI and the second stage SCI allows for transmitting information describing the resources for the further transmission so that all user devices may decode the information, so that overlapping traffic by different user devices may be avoided.
  • the user device is to include an information about resources (e.g. radio resources) reserved for a transmission of data having an aperiodic traffic type into the first stage SCI.
  • resources e.g. radio resources
  • the further UE receiving the first stage SCI may exclude the reserved resources in a selection of resources for a transmission.
  • overlapping traffic may be avoided.
  • the user device is to include an information about resources (e.g. radio resources, e.g. resources in time and frequency domains) reserved for a transmission of the second stage sidelink information (or SCI) into the first stage SCI. Based on the information about the resources reserved for the transmission of the second stage SCI, the further UE receiving the first stage SCI may predict resources reserved for a transmission.
  • the user device is to include an information about resources (e.g. radio resources, e.g. resources in time and frequency domains) reserved for a transmission of a block comprising both the second stage sidelink information (or SCI) and data into the first stage SCI. Including the information about resources for both the second stage SCI and data into the first stage SCI, allows the further UE for a particularly precise prediction of occupied resources.
  • the user device is to include an information describing a priority of data (e.g. of data having an aperiodic traffic type) into the first stage SCI. Based on the information about the priority of data, the further UE receiving the first stage SCI may prioritize a processing of transmissions received from different UEs, hence ensuring that data of a higher priority is processed with a higher priority. Transmitting the information about the priority in the first stage SCI has the advantage, that the further UE is informed about the priority before decoding the information of the following transmission to which the first stage SCI refers. According to an embodiment, the user device is to transmit the second stage SCI (and data) temporally after a transmission of the first stage SCI (e.g.
  • the user device is to re-transmit the first stage SCI one time or multiple times (e.g. ahead of a transmission of the second stage SCI, and/or ahead of a transmission of data) (Wherein delay between 1st SCI and second SCI and data transmission duration should not be beyond the packet latency requirements, i.e. packet delay budget (PDB)).
  • PDB packet delay budget
  • Retransmitting the first stage SCI increases the probability that the first stage SCI may be received and decoded by the further UE.
  • the first stage SCI and may reach the further user device, although the resources for the first stage SCI may not have been reserved in advance.
  • the user device is to selectively re-transmit the first stage SCI in case of an aperiodic transmission (e.g. to selectively retransmit first-stage SCI associated with aperiodic data while omitting a re-transmission of first stage SCI associated with periodic data).
  • Aperiodic traffic may be particularly urgent and/or may be difficult to predict without being announced in advance, while other traffic, e.g. periodic traffic may be predicted otherwise, e.g. by pattern recognition.
  • Selectively retransmitting the first stage SCI for aperiodic traffic provides a good tradeoff between avoiding a large traffic overhead due to repeated transmissions of first stage SCIs and achieving a high reliability for successfully transmitting aperiodic traffic.
  • the user device is to perform a blind re-transmission of first stage SCI (e.g. without evaluating an acknowledgement information indicating whether the first stage SCI was properly received).
  • a blind retransmission increases the reliability for successfully transmitting the aperiodic traffic, even if the user device does not have information whether the initial transmission of the first stage SCI reached the further user device.
  • the further user device does not necessarily have to transmit a confirmation for having received the first stage SCI, so that additional traffic may be avoided.
  • the user device is to adjust a number of (blind) retransmissions of the first stage sideling control information in dependence on a higher level signaling or in dependence on a system information block.
  • Adjusting the number of retransmissions allows to consider the current situation, for example the priority of the data to be transmitted and/or a current traffic load in the sidelink. Thus, depending on the situation, additional traffic may be avoided by selecting a low number of retransmissions, and/or a high reliability for successful data transmission may be achieved by selecting a high number of fruit transmissions.
  • the user device is configured to implicitly signal an aperiodic traffic type.
  • An implicit signaling may avoid additional signaling overhead for signaling the traffic type.
  • the user device is configured to implicitly signal an aperiodic traffic type using a resource reservation period parameter and/or using a periodicity parameter (wherein the resource reservation period parameter and/or the periodicity parameter are, for example, included in the first stage SCI).
  • the periodicity parameter and/or the resource reservation period parameter may be used for signaling information about of periodic data in case of periodic traffic, using one or both of them for signaling aperiodic traffic has the advantage, that a common parameter, or one or more common bit positions, may be used for signaling information about periodic traffic or aperiodic traffic. Traffic is either periodic or aperiodic, it may not be necessary to indicate additionally, which type of information the respective bit position indicates.
  • the user device is configured to set a periodicity parameter (which may, for example, describe how often a resource is reserved) to a disabled value (e.g. to a zero value) in order to signal an aperiodic traffic type.
  • a periodicity parameter may be used to indicate a number of reoccurrences of reserved resources in case of periodic traffic, it is free in case of aperiodic traffic, so that having a disabled value for the periodicity parameter may avoid occupying an additional bit position for transmitting the information about the traffic is aperiodic and/or for indicating a type of information indicated by the bit position of the periodicity parameter.
  • the user device is configured to provide the information (e.g.
  • a traffic type identifier or a periodicity parameter or a resource reservation period parameter
  • a traffic type is periodic or aperiodic in dependence on (or in response to) a higher level signaling or higher layer signaling (e.g. a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer).
  • a higher level signaling or higher layer signaling e.g. a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer.
  • the user device is configured to provide the first stage SCI such that the first stage SCI is associated with an immediately subsequent transport block, or wherein the user device is configured to provide the first stage SCI such that the first stage SCI is associated with an associated transport block, such that there are one or more transport blocks between the first stage SCI and the associated transport block or such that there is a time gap between the first stage SCI and the associated transport block.
  • the immediately subsequent transport block may transport information to be transmitted, so that in case that the transmission is successful, for example even though the corresponding resources have not been reserved in advance, the data is transmitted particularly fast, e.g. without a time delay between the first stage SCI and a transmission of the data.
  • a time delay between the first stage SCI and the transport block allows the further user device to consider the reserved resources for the transport block, as described in the first stage SCI, in the selection of the own transmissions, so that the probability of a successful transmission of the data block is high.
  • the user device is configured to explicitly signal an aperiodic traffic type.
  • An explicit signaling of aperiodic traffic enables an easy implementation and a high compatibility, as the signaling may be independent from signaling of other information.
  • the user device is configured to explicitly signal an aperiodic traffic type using an aperiodic flag (e.g. an additional bit indicating whether a traffic is periodic or aperiodic) (wherein the aperiodic flag is, for example, included in the first stage SCI).
  • a flag may provide a possibility to signal the traffic type with a low data size, for example because the type of information which is signaled by the flag may be known by the receiver.
  • the user device is configured to provide the aperiodic flag indicating whether a traffic type is periodic or aperiodic in dependence on (or in response to) a higher level signaling (e.g.
  • a signaling in a higher protocol layer which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer). Accordingly, in situations in which the information about the traffic type is not required, for example because only one type of traffic is currently used, signaling overhead may be avoided.
  • the user device is configured to indicate a transmission time and/or a transmission frequency of an aperiodic traffic in a resource reservation period in the first stage SCI.
  • the resource reservation period parameter may be in the case of periodic traffic for indicating a time interval between successive transmissions.
  • Using the resource reservation period parameter for indicating the transmission time and/or the transmission frequency in case of an aperiodic traffic may avoid the need to signal an additional parameter.
  • a high data efficiency is achieved.
  • traffic is either periodic or aperiodic, it may not be necessary to transmit and an additional information indicating which information is indicated by the races reservation period parameter.
  • the first stage SCI comprises a resource reservation period.
  • the further user device may avoid using reserved resources indicated by the resource reservation period.
  • aperiodic traffic can be (or is) implicitly interpreted in the resource reservation period or in periodicity parameter indicated in 1 st SCI of two-stage SCI with dependent upon the higher level signaling when it is disabled or set to zero value; and/or wherein 1 st SCI can be (or is) associated with a same or different transport block (TB) for initial transmission or retransmission.
  • 1 st SCI can be (or is) associated with a same or different transport block (TB) for initial transmission or retransmission.
  • aperiodic traffic channel in the user device, can be (or is) explicitly indicated in 1 st SCI of two-stage SCI by an additional bit as aperiodic flag indicated in 1 st SCI of two-stage SCI on the higher layer with dependent upon a higher level signaling; and/or wherein transmission time and frequency of aperiodic traffic is indicated in the resource reservation period in 1 st SCI of two-stage SCI; and/or wherein 1st SCI can be (or is) associated with a same or different transport block (TB) for initial transmission or retransmission.
  • TB transport block
  • the LJE is to selectively (that is selectably) (e.g. in dependence on a configuration signaled by higher layer signaling) provide, at one or more (common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g. at the same one or more bit positions, or at the same single bit position), one or more bits (e.g., preferably, a single bit) indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits (e.g., preferably, a single bit) indicating another transmission parameter (e.g.
  • flag indicating whether backward annotation is used or not (such that, for example, a field (or bit position) “traffic type” is used to indicate a traffic type or another transmission parameter, like a flag indicating a backward indication, depending on a configuration signaled, for example, by a higher level signaling).
  • Indicating the traffic type at the multi-use bit position allows to signal the traffic type if required, but may avoid a signaling of an unnecessary high number of bits, as the multi-use bit position may be used for other purposes, if a signaling of the traffic type is not required.
  • the multi-use bit position provides a high flexibility in signaling of transmission parameters.
  • the user device is to select, whether one or more bits indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are provided at the one or more multi-use bit positions in dependence on a on a higher layer signaling (e.g. in dependence on a signaling indicated using a radio resource control message (RRC message) or in dependence on a signaling indicated using a SCI); or wherein the user device provides a signaling (e.g. a higher layer signaling, e.g.
  • a higher layer signaling e.g.
  • a signaling in a radio resource control message or a signaling in a sidelink control channel indicating whether one or more bits indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are provided at the one or more multi-use bit positions.
  • a traffic type is periodic or aperiodic
  • a transmission parameter e.g. flag indicating whether backward annotation is used or not
  • the communication system may signal to the user device and the further user device, for which purpose the multi-use bit position is used, so that the user device may not have to signal the type of usage of the multi-use bit position on its own, such decreasing the data traffic of the sidelink.
  • the user device is to evaluate one or more bits (e.g., preferably, a single bit “traffic type indicator-SL”) of a radio resource control information or of a radio resource control message (e.g. of a radio resource control message related to or of radio resource control message portion), in order to decide whether to provide one or more bits (e.g., preferably, a single bit) indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits (e.g., preferably, a single bit) indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not).
  • a traffic type indicator-SL e.g., a single bit “traffic type indicator-SL”
  • a radio resource control message may be a particularly efficient way to signal the usage of the multi-use bit position, for example as the user device is aware of the type of information signal by the one or more bits. Thus, a low data traffic of a higher layer signaling may be ensured.
  • the user device is to selectively provide one or more bits (e.g., preferably, only a single bit) indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier or a periodicity parameter), or one or more bits (e.g., preferably, only a single bit) indicating whether a backward indication is used or not, at the one or more multiuse bit position (e.g., preferably, at a same, shared single bit position).
  • aperiodic traffic and backward indication may not be used simultaneously, using the multi use bit positions for traffic type indication or for backward indication may allow for a low data traffic, for example without limiting usage of aperiodic traffic or backward indication.
  • the user device is to provide an information indicating which logical slots (e.g. which slots out of slots h.i,po,pi) are used for a data transmission if backward indication is used (wherein, for example, the user device may be to select which logical slots are used for the data transmission; wherein for example, the user device may be configured to decide whether one or more logical slots preceding the first stage SCI are used for data transmission or not).
  • Providing an information which indicates which logical slots are used may increase the flexibility for using and reserving resources, so that a particularly fast transmission of data may be achieved.
  • the user device is to provide an information indicating which logical slots (e.g. which slots out of slots n.i,n 0 ,ni) are used for a data transmission using a reservation resource period field in the first stage SCI. Providing the information about the logical slots may enable the further device to predict occupied resources reliably.
  • a user device for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to receive a first stage SCI describing reserved resources for transmission of further information comprising a second stage SCI (and preferably for transmission of data), wherein the first stage SCI comprises an information (e.g. a traffic type identifier) indicating whether a traffic type is periodic or aperiodic; and wherein the UE is configured to use the information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g. to determine radio resources used for a transmission of aperiodic traffic by a further user device).
  • an information e.g. a traffic type identifier
  • the UE is configured to use the information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g. to determine radio resources used for
  • the user device is to decide, on the basis of the information indicating whether a traffic type is periodic or aperiodic, whether to evaluate the second stage SCI or not. Accordingly, and unnecessary evaluation of the second stage SCI may be avoided, saving processing time and allowing for prioritizing evaluation of urgent information.
  • the user device is to selectively evaluate information describing radio resources used for the transmission of a data block by a further user device, which (information) is included in the first stage SCI, if the first stage SCI indicates an aperiodic traffic type (while avoiding an evaluation of the information describing radio resources used for the transmission of a data block, if the first stage SCI indicates a periodic traffic type), and/or wherein the user device is to selectively evaluate information describing radio resources used for the transmission of the second stage SCI by a further user device, which is included in the first stage SCI (e.g.
  • the second stage sidelink control channel extracting a location, in terms of radio resources, a the second stage sidelink control channel from the first stage sidelink control channel), if the first stage SCI indicates an aperiodic traffic type (while avoiding an evaluation of the information describing radio resources used for the transmission of the second stage SCI, if the first stage SCI indicates a periodic traffic type) (e.g. in order to obtain an information about radio resources used by a further user device), and/or wherein the user device is to selectively evaluate the second stage SCI (e.g.
  • the first stage SCI indicates an aperiodic traffic type (while avoiding an evaluation of the second stage SCI if the first stage SCI indicates a periodic traffic type) (wherein the determination of radio resources used by a further user device is preferably used for a selection of transmission resources for usage by the present user device).
  • Selectively evaluating the information describing the radio resources in case of aperiodic traffic reduces the amount of data to be evaluated, for example decoded, so that the information may be evaluated within a short time span and/or with a low processing power.
  • a short evaluation time for the information describing the radio resources allows for a usage of a short time delay between the first stage SCI and the described radio resources, so that data may be transmitted particularly fast by aperiodic traffic.
  • the user device is to extract an information describing radio resources used for the transmission of the second stage SCI from the first stage SCI (and to use the information describing the radio resources used for the transmission of the second stage SCI for evaluating the second stage SCI).
  • the user device is in knowledge about the information about the second stage SCI, for example before receiving the second stage SCI, the user device is in knowledge about which information to expect from the radio resources indicated by the first stage SCI. This knowledge, prior to receiving the second stage SCI may allow for a fast evaluation of the second stage SCI.
  • the user device is to extract an information describing radio resources used for the transmission of a data block of an aperiodic traffic type (e.g. a data block comprising the second stage SCI and data (e.g. payload data) of the aperiodic data type, or a data block comprising only data (e.g. payload data) of the aperiodic traffic type) from the first stage SCI (and to use the information describing the radio resources used for the transmission of the data block for a selection of transmission resources, e.g. for excluding radio resources used for the transmission of data of the aperiodic traffic type by one or more further user devices from a selection of transmission resources by the present user device).
  • an describing radio resources used for the transmission of a data block of an aperiodic traffic type e.g. a data block comprising the second stage SCI and data (e.g. payload data) of the aperiodic data type, or a data block comprising only data (e.g. payload data) of
  • the user device is to extract an information describing radio resources used for the transmission of a data block of an aperiodic traffic type (e.g. a data block comprising only data (e.g. payload data) of the aperiodic traffic type) from the second stage SCI (and to use the information describing the radio resources used for the transmission of the data block for a selection of transmission resources, e.g. for excluding radio resources used for the transmission of data of the aperiodic traffic type by one or more further user devices from a selection of transmission resources by the present user device).
  • an describing radio resources used for the transmission of a data block of an aperiodic traffic type e.g. a data block comprising only data (e.g. payload data) of the aperiodic traffic type
  • the user device is to use a pattern recognition to recognize a periodic traffic pattern (e.g. caused by a periodic transmission by one or more further UEs) in a sensing window, and to predict radio resources used for periodic traffic after an end of the sensing window on the basis of the recognition of the periodic traffic pattern (e.g. to avoid using the predicted radio resources when scheduling an own transmission).
  • Pattern recognition allows to recognize a periodic traffic without the need for an evaluation, for example a decoding, of information comprised in received traffic, so that the prediction of occupied resources may be performed particularly fast and computationally efficient.
  • the user device is to predict radio resources used for periodic traffic without decoding SCI associated with individual data blocks of the periodic traffic. Omitting a decoding of SCI of periodic traffic for the prediction of occupied resources saves computational power and may increase the speed of the prediction of occupied resources.
  • the information indicating whether a traffic type is periodic or aperiodic is an implicit information; and wherein the user device is configured to use the implicit information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g., to determine radio resources used for a transmission of aperiodic traffic by a further user device) (wherein an aperiodic traffic type is signaled implicitly).
  • the user device is configured to evaluate a resource reservation period parameter and/or a periodicity parameter in order to recognize whether a traffic type is aperiodic (wherein the resource reservation period parameter and/or the periodicity parameter are, for example, included in the first stage SCI).
  • the user device is configured to (selectively) recognize an aperiodic traffic type if a periodicity parameter (which may, for example, describe how often a resource is reserved) is set to a disabled value (e.g. to a zero value)(wherein the “disabled value” implicitly signals an aperiodic traffic type).
  • a periodicity parameter which may, for example, describe how often a resource is reserved
  • a disabled value e.g. to a zero value
  • the user device is configured to provide a higher level signaling (e.g. a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer) in response to a detection (e.g. on the basis of the traffic type identifier, or a periodicity parameter or a resource reservation period parameter indicating whether a traffic type is periodic or aperiodic) that a traffic type is aperiodic.
  • aperiodic traffic may have the high relevance or may be very urgent, so that, based on the higher level signaling provided by the user device, the data signaled in the aperiodic traffic may be handled with a high priority on the higher layer.
  • the user device is configured to evaluate a first stage SCI which is associated with an immediately subsequent transport block, in order to determine whether a traffic type is periodic or aperiodic, or wherein the user device is configured to evaluate a first stage SCI which is associated with an associated transport block, such that there are one or more transport blocks between the first stage SCI and the associated transport block or such that there is a time gap between the first stage SCI and the associated transport block, in order to determine whether a traffic type is periodic or aperiodic.
  • the information indicating whether a traffic type is periodic or aperiodic is an explicit information; and wherein the user device is configured to use the explicit information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g. to determine radio resources used for a transmission of aperiodic traffic by a further user device) (wherein an aperiodic traffic type is signaled implicitly)
  • the user device is configured evaluate an aperiodic flag which explicitly signals an aperiodic traffic type (e.g. an additional bit indicating whether a traffic is periodic or aperiodic) (wherein the aperiodic flag is, for example, included in the first stage SCI) in order to determine whether a traffic type is periodic or aperiodic.
  • the user device is configured to provide a higher level signaling (e.g. a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer) in response to a detection, on the basis of the aperiodic flag indicating whether a traffic type is periodic or aperiodic, that a traffic type is aperiodic.
  • a higher level signaling e.g. a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer
  • the user device is configured to evaluate a transmission time and/or a transmission frequency of an aperiodic traffic in a resource reservation period in the first stage SCI.
  • the first stage SCI comprises a resource reservation period.
  • aperiodic traffic in the user device, can be implicitly predicted based on resource reservation period or periodicity parameter indicated in 1 st SCI of two- stage SCI with dependent upon a higher level signaling when it is disabled or set to zero value; and/or wherein transmission time and frequency of aperiodic traffic is indicated in the resource reservation period in 1 st SCI of two-stage SCI; and/or wherein 1 st SCI can be associated with the same or different transport block (TB) for initial transmission or retransmission.
  • TB transport block
  • aperiodic traffic channel in the user device, can be (or is) explicitly decoded in 1 st SCI of two-stage SCI by the one additional bit as aperiodic flag indicated in 1 st SCI of two-stage SCI on the higher layer with dependent upon a higher level signaling; and/or wherein transmission time and frequency of aperiodic traffic is indicated in the resource reservation period in 1 st SCI of two-stage SCI; and/or wherein 1 st SCI can be (or is) associated with the same or different transport block (TB) for initial transmission or retransmission.
  • TB transport block
  • the UE is to selectively evaluate one or more (common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”; e.g. one bit that is defined for the traffic type) (e.g. one or more bits at the same one or more bit positions, or a single bit at the same single bit position), to obtain a traffic type information indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not).
  • a traffic type information indicating whether a traffic type is periodic or aperiodic
  • a traffic type identifier e.g. a traffic type identifier, or a periodicity parameter
  • another transmission parameter e.g. flag indicating whether backward annotation is used or not.
  • the user device is to select, whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position, or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not) on the basis on the basis of the one or more bits at the multi-use bit position, in dependence on a on a higher layer signaling (e.g. in dependence on a signaling indicated using a radio resource control message (RRC message) or in dependence on a signaling indicated using a SCI); or wherein the user device is to provide a signaling (e.g.
  • a higher layer signaling e.g. a signaling in a radio resource control message or a signaling in a sidelink control channel
  • a higher layer signaling e.g. a signaling in a radio resource control message or a signaling in a sidelink control channel
  • a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are to be provided at the one or more multi-use bit positions.
  • the user device is to evaluate one or more bits (e.g., preferably, a single bit “traffictype indicator-SL”) of a radio resource control information or of a radio resource control message (e.g. of a radio resource control message related to or of radio resource control message portion), in order to decide whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position, or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not) on the basis on the basis of the one or more bits at the multi-use bit position.
  • a traffic type information indicating whether a traffic is periodic or aperiodic
  • a traffic type identifier e.g. a traffic type identifier, or a periodicity parameter
  • the user device is to select whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position (e.g., preferably, on the basis of a single bit), or to obtain an information indicating whether a backward indication is used or not on the basis of the one or more bits at the multi-use bit position (e.g., preferably, on the basis of a single bit).
  • a traffic type information indicating whether a traffic is periodic or aperiodic e.g. a traffic type identifier, or a periodicity parameter
  • the user device is to obtain an information indicating which logical slots (e.g. which slots out of slots n.i,no,ni) are used for a data transmission if backward indication is used (wherein, for example, the user device may be to select which logical slots are used for the data reception; wherein for example, the user device may be to decide whether one or more logical slots preceding the first stage SCI are used for data reception or not).
  • logical slots e.g. which slots out of slots n.i,no,ni
  • backward indication wherein, for example, the user device may be to select which logical slots are used for the data reception; wherein for example, the user device may be to decide whether one or more logical slots preceding the first stage SCI are used for data reception or not).
  • the user device is to obtain an information indicating which logical slots (e.g. which slots out of slots n.i,n 0 ,ni) are used for a data transmission using a reservation resource period field in the first stage SCI.
  • logical slots e.g. which slots out of slots n.i,n 0 ,ni
  • the radio resources to be reserved for a transmission may be identified reliably, precisely and/or computationally efficiently, by adjusting sizes of the one or more sensing windows during which resources used for the prediction of occupied resources are detected.
  • the sensing windows may be adjusted according to a zone information which may represent operational conditions of data traffic and/or off the user device. For example, a periodicity of transmissions, a delay between transmissions, or a traffic load may depend on the operational condition.
  • adjusting the size of the sensing window to the operational condition may increase the reliability for selecting the reserved resources.
  • the size of the sensing window may be adapted according to a quality of service information. This allows, for example, to spend more computational resources for transmissions of higher relevance, providing for both an efficient processing and a high reliability of important data transmissions.
  • Embodiments according to the second inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to sense radio resources (e.g.one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g. of control information or for a transmission of data)(wherein, for example, identifying radio resources for transmission by the present user device comprises excluding radio resources used for transmission by one or more further user devices from a selection of radio resources for transmission by the present user device), wherein the UE is to adjust sizes (e.g.
  • a temporal size, like a sensing duration) of the one or more sensing windows in dependence on a zone information (e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different use cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types) and/or in dependence on a quality-of-service information (e.g. 5QI and/or ARP and/or RQA and/or notification control and/or flow bit rates and/or aggregate bit rates and/or default values and/or maximum packet loss rate resource type and/or priority level and/or packet delay budget and/or packet error rate and/or averaging window and/or maximum data burst volume).
  • a zone information e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different use cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types
  • a quality-of-service information e.g. 5QI and/or A
  • the user device is to adjust sizes of one or more short term sensing windows (for example, sensing windows which are temporally between a long term sensing window and a transmission of data by the present user device) (which are, for example, used for a detection of radio resources used for a transmission of data of a first traffic type (e.g. aperiodic traffic type), e.g.
  • a first traffic type e.g. aperiodic traffic type
  • Short sensing is, for example, used for aperiodic traffic and traffic with low latency requirements
  • the user device is to adjust sizes of one or more long term sensing windows (which are, for example, used for a detection of radio resources used for a transmission of data of a second traffic type, e.g.
  • an adjustment of long-term sensing windows may increase the reliability or the efficiency for predicting resources occupied by periodic traffic.
  • a small size of a long-term sensing window may imply a low processing effort and a high processing speed, while a large size of the long-term sensing window may apply a high accuracy for predicting resources.
  • An adjustment of short term sensing windows may increase the reliability or the efficiency for predicting resources occupied by aperiodic traffic.
  • the user device is to adjust a size of a sensing window which is used for a determination (e.g. a determination which is based on an analysis of SCI) of radio resources used by one or more further user devices for a transmission of data of an aperiodic traffic type (e.g. a size of a short term sensing window) in dependence on the zone information and/or in dependence on the quality of service information, and/or wherein the user device is to adjust a size of a sensing window which is used for a determination (e.g.
  • Adjusting the size of a sensing window which is used for a specific traffic type, such as aperiodic traffic or periodic traffic allows for an adjustment of the sensing window under consideration of the respective type of traffic, so that a high accuracy in predicting resources for the respective traffic type may be achieved.
  • the zone information considers or is based on one or more of the following criteria: a geographical area in which the user device is located; a cast-type of data traffic (e.g. unicast, multicast or broadcast); a use case of data traffic (e.g. platooning, remote driving, extended sensors and advanced driving); movement characteristics (e.g. direction and/or velocity of one or more vehicles or moving user devices); a traffic type (e.g. periodic or aperiodic).
  • a geographical area in which the user device is located a cast-type of data traffic (e.g. unicast, multicast or broadcast); a use case of data traffic (e.g. platooning, remote driving, extended sensors and advanced driving); movement characteristics (e.g. direction and/or velocity of one or more vehicles or moving user devices); a traffic type (e.g. periodic or aperiodic).
  • the user device is to receive the zone information using a higher level signaling (e.g. using a RRC signaling).
  • the user device is to map a zone information (which is, for example, communicated to the user device using a higher-level signaling) onto sizes (e.g. temporal lengths, or sizes in time- and frequency direction) of one or more sensing windows (e.g.
  • the user device is to adjust sizes of one or more sensing windows in dependence on a resource type of data to be transmitted, and/or in dependence on a priority of data to be transmitted, and/or in dependence on a packed delay budget of data to be transmitted, and/or in dependence on a permissible packet error rate of data to be transmitted, and/or in dependence on characteristics of an averaging windowing, and/or in dependence on a maximum data burst volume of data to be transmitted.
  • the user device is to adjust sizes of one or more sensing windows on the basis of a 5QI quality of service value which is associated with two or more of the following criteria: a resource type of data to be transmitted, and/or a priority of data to be transmitted, and/or a packed delay budget of data to be transmitted, and/or a permissible packet error rate of data to be transmitted, and/or characteristics of an averaging windowing, and/or a maximum data burst volume of data to be transmitted.
  • a 5QI quality of service value which is associated with two or more of the following criteria: a resource type of data to be transmitted, and/or a priority of data to be transmitted, and/or a packed delay budget of data to be transmitted, and/or a permissible packet error rate of data to be transmitted, and/or characteristics of an averaging windowing, and/or a maximum data burst volume of data to be transmitted.
  • the user device is to receive a configuration information (e.g. using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage) describing one or more sensing window sizes associated with one or more quality requirements.
  • a configuration information e.g. using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage
  • the user device comprises a predetermined table mapping a plurality of set of quality requirements onto one or more associated sensing window sizes, or wherein the user device is to set entries of a table mapping a plurality of set of quality requirements onto one or more associated sensing window sizes in response to a reception of a configuration information (which may, for example, be received using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage).
  • a configuration information which may, for example, be received using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage.
  • a third inventive concept relies on the idea, that an adjustment of a size selection window, from which resources for a transmission are selected, in dependence on a current operational situation or in dependence on the data, for which the resources are selected, may provide for a good trade-off between a high reliability for transmission of data and a fast transmission, e.g. timely or shortly after obtaining the data for transmission.
  • the size of the selection window may be adapted to the traffic type of the resources to be selected or the priority of the data to be transmitted.
  • Implementation details of the third inventive concept may have similar advantages as corresponding features of implementations of the second inventive concept.
  • Embodiments according to the third inventive concept provides a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to sense radio resources (e.g. one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g.
  • radio resources e.g. one or more time-frequency regions
  • identifying radio resources for transmission by the present user device comprises excluding radio resources used for transmission by one or more further user devices from a selection of radio resources for transmission by the present user device) in a selection window, wherein the UE is to adjust a size (e.g. a temporal size) of the selection window in dependence on a zone information (e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types) and/or in dependence on a quality-of-service information (e.g.
  • the zone information considers or is based on one or more of the following criteria: a geographical area in which the user device is located; a cast-type of data traffic (e.g. unicast, multicast or broadcast); a use case of data traffic (e.g. platooning, remote driving, extended sensors and advanced driving); movement characteristics (e.g. direction and/or velocity of one or more vehicles or moving user devices); a traffic type (e.g. periodic or aperiodic).
  • a geographical area in which the user device is located a cast-type of data traffic (e.g. unicast, multicast or broadcast); a use case of data traffic (e.g. platooning, remote driving, extended sensors and advanced driving); movement characteristics (e.g. direction and/or velocity of one or more vehicles or moving user devices); a traffic type (e.g. periodic or aperiodic).
  • the user device is to receive the zone information using a higher level signaling (e.g. using a RRC signaling).
  • a higher level signaling e.g. using a RRC signaling
  • the user device is to map a zone information (which is, for example, communicated to the user device using a higher-level signaling) onto a size (e.g. temporal lengths, or sizes in time- and frequency direction) of the selection window.
  • a zone information which is, for example, communicated to the user device using a higher-level signaling
  • a size e.g. temporal lengths, or sizes in time- and frequency direction
  • the user device is to adjust sizes of the selection window
  • the user device is to adjust sizes of the selection window on the basis of a 5QI quality of service value which is associated with two or more of the following criteria:
  • the user device is to receive a configuration information (e.g. using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage) describing one or more selection window sizes associated with one or more quality requirements.
  • the user device comprises a predetermined table mapping a plurality of sets of quality requirements onto one or more associated selection window sizes, or wherein the user device is to set entries of a table mapping a plurality of set of quality requirements onto one or more associated selection window sizes in response to a reception of a configuration information (which may, for example, be received using a higher layer signaling, like an RRC signaling; e.g. from a gNB when the user device is in coverage).
  • a fourth inventive concept relies on the idea, that pattern recognition may be used to recognize a traffic type of sensed traffic, such as periodic traffic or aperiodic traffic. Recognizing the traffic type of sensed traffic allows for a specific processing of traffic of a specific type, for example for predicting occupied resources of the specific traffic type, or for selecting a method according to which occupied resources of the specific traffic type may be predicted. Pattern recognition may be a particularly fast and computationally efficient method for recognizing traffic types, because, for example, pattern recognition may allow for a recognition of the traffic type without an evaluation or decoding of the sensed traffic.
  • recognizing the traffic type may even allow for recognizing the traffic type prior to a decoding of the sensed traffic and to decide, whether to decode a portion of the sensed traffic or not in dependence on the traffic type recognized for the respective portion of the sensed traffic.
  • recognizing the traffic type allows for selecting, different processing methods for different traffic types, so that processing methods for different traffic types may be selected so as to be particularly suitable or efficient for the traffic types for which they are selected.
  • Embodiments according to the fourth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to sense radio resources (e.g. one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g. of control information or for a transmission of data), wherein the UE is to use a pattern recognition (e.g.
  • a recognition of a pattern describing a distribution of power or energy over time and/or over frequency and/or a recognition of a pattern describing a distribution of power or energy over a plurality of radio resources to recognize periodic traffic and/or aperiodic traffic (e.g. on the basis of a sidelink reference signal received power information obtained for a plurality of time-frequency portions of a radio resource, and/or on the basis of a receives signal strength information obtained for a plurality of time-frequency portions of a radio resource)
  • the pattern recognition may, for example use one or more of the following techniques: neural networks, artificial intelligence, machine learning, or the like).
  • the user device is to use the pattern recognition to recognize a periodic traffic pattern (e.g. caused by a periodic transmission by one or more further UEs) in a sensing window, and to predict radio resources used for periodic traffic after an end of the sensing window or during the sensing window on the basis of the recognition of the periodic traffic pattern (e.g. to avoid using the predicted radio resources when scheduling an own transmission).
  • Pattern recognition may recognize periodic traffic particularly easy and reliably, making pattern recognition a fast and computationally efficient tool for recognizing periodic traffic. Based on the periodic traffic pattern of the periodic traffic, resources reserved for upcoming transmissions may be predicted very accurately. Thus, in case of periodic traffic, pattern recognition may be a fast and accurate method for predicting occupied resources.
  • the user device is to predict the radio resources used for periodic traffic without decoding SCI associated with individual data blocks of the periodic traffic. Predicting radio resources reserved for periodic traffic without decoding the SCI saves computational power and time for decoding.
  • the user device is to distinguish between periodic traffic and aperiodic traffic using the pattern recognition, and wherein the user device is to selectively evaluate SCI associated with data blocks of the aperiodic traffic (while avoiding an evaluation of SCI associated with data blocks of the periodic traffic), in order to obtain an information about radio resources used by one or more further user devices for a transmission of aperiodic traffic (and in order to avoid using such radio resources used by one or more further user devices when scheduling an own transmission). Evaluating selectively the SCI of aperiodic traffic, avoids an evaluation of the SCI associated with other traffic types, such as periodic traffic, thus saving computational power.
  • the evaluation of the SCI associated with aperiodic traffic may be prioritized or performed faster.
  • a fast or timely evaluation of the SCI of aperiodic traffic may ensure a reliable reception of data associated with the aperiodic traffic.
  • the user device is to perform the pattern recognition on the basis of a receive energy information obtained for a plurality of time-frequency regions or on the basis of a receive power information obtained for a plurality of time-frequency regions (e.g. time-frequency blocks) (e.g. lying within the sensing window).
  • Performing the pattern recognition on the basis of the receive energy information or the receive power information allows for a pattern recognition without decoding the information signal by the plurality of time frequency regions.
  • the pattern recognition may be performed particularly fast and computationally efficiently.
  • the user device is to perform the pattern recognition on the basis of received signal strength indicator values (e.g. RSSI) associated with a plurality of time-frequency regions or on the basis of reference signal received power values (e.g. S- RSRP-values) associated with a plurality of time-frequency regions (wherein, for example, a received signal strength indicator value may be a value which describe a signal strength over a predetermined bandwidth, which comprises a plurality of subcarriers, and wherein a reference signal received power value may be a value describing a signal strength of a single subcarrier, e.g. a signal strength of a single symbol).
  • Performing the pattern recognition on the basis of the RSSI or the RSRP allows for a pattern recognition without decoding the information signal by the plurality of time frequency regions.
  • the pattern recognition may be performed particularly fast and computationally efficiently.
  • the user device is to selectively exclude radio resources, which are identified to be associated with periodic traffic on the basis of the pattern recognition, from a decoding (such that a prediction of radio resources occupied by periodic traffic is made without decoding the periodic traffic, and/or without decoding SCI associated with the periodic traffic). Excluding radio resources of periodic traffic from decoding saves computational power. For example, for periodic traffic, pattern recognition may be used to predict reserved resources, so that a decoding may be unnecessary for predicting reserved resources.
  • the user device is to perform (and complete) the pattern recognition prior to starting SCI (e.g. a decoding of SCI) (wherein a decision, whether to decode SCI is made on the basis of a result of the pattern recognition).
  • SCI e.g. a decoding of SCI
  • a decision, whether to decode SCI is made on the basis of a result of the pattern recognition.
  • pattern recognition may be used to distinguish between periodic and aperiodic traffic and a decision whether to decode a SCI may be made in dependence on whether the SCI is associated with periodic traffic or aperiodic traffic.
  • the user device is to adjust a pattern recognition duration (e.g. TPRG) on the basis of a control information (e.g. on the basis of a control information obtained using a higher layer signaling or obtained using a radio resource control (RRC) or obtained using a system information block (SIB)) (wherein, for example, a pattern recognition duration may be adjusted to be shorter than a length of a sensing window).
  • a pattern recognition duration may be adjusted to be shorter than a length of a sensing window.
  • a processing power required by the pattern recognition may be adapted to the current situation. For example, a shorter pattern recognition duration may require less computational power, while a longer pattern recognition duration may provide a higher accuracy in predicting reserved resources or in recognizing periodic and/or aperiodic traffic.
  • the user device is to adjust a pattern recognition accuracy (e.g. Aii m ) on the basis of a control information (e.g. on the basis of a control information obtained using a higher layer signaling or obtained using a radio resource control (RRC) or obtained using a system information block (SIB)).
  • a pattern recognition accuracy e.g. Aii m
  • a control information e.g. on the basis of a control information obtained using a higher layer signaling or obtained using a radio resource control (RRC) or obtained using a system information block (SIB)
  • RRC radio resource control
  • SIB system information block
  • a fifth inventive concept relies on the idea, to select a value (or a level) of a transmission parameter for a transmission of data according in dependence on the traffic type. Consequently, the traffic type of the transmission may be derived by sensing or detecting or evaluating the transmission parameter of the transmission. If the receiving user device is in knowledge of the association between the value (or the level) of the transmission parameter and the traffic type, this concept provides a possibility to indicate the traffic type without signaling the traffic type in the SCI. Thus, no signaling overhead is necessary for the indication of the traffic type. As the value or the level of the transmission parameter may be easy to characterize, the receiving device may recognize the traffic type particularly fast according to this concept. Further, this type of traffic type indication may be easy implementable and may save computational power, e.g.
  • the transmission parameter may, for example, be a code for code-division-multiplexing, or may be a power level of the transmitted signal.
  • Embodiments according to the fifth inventive concept provide a user device, LJE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the LIE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to transmit information associated with an aperiodic traffic type (e.g.
  • code-division-multiplexing may allow to distinguish the traffic types very accurately. For example, code-division- multiplexing may provide for an unique association of a transmitted signal with a codedivision-multiplex code. Further, code-division-multiplexing may be performed fast and may consume little power, e.g. on both, transmitter and receiver side.
  • the user device is to obtain control information (e.g. a “higher signaling message) (e.g. an RRC message or a SIB) (e.g. from a coordinating device) (different) signaling one or more code-division-multiplex codes to be used to transmit information associated with an aperiodic traffic type and one or more code-division-multiplex codes to be used to transmit information associated with a periodic traffic type.
  • control information e.g. a “higher signaling message) (e.g. an RRC message or a SIB)
  • RRC message or a SIB e.g. from a coordinating device
  • the user device is to select a code-division-multiplex code for a transmission of information associated with an aperiodic traffic type from a group (e.g. CDM group 1) of two or more code-division-multiplex codes associated with the aperiodic traffic type, and/or wherein the user device is to select a code-division-multiplex code for a transmission of information associated with a periodic traffic type from a group (e.g. CDM group 0) of two or more code-division-multiplex codes associated with the periodic traffic type.
  • a group e.g. CDM group 1
  • CDM group 0 group of two or more code-division-multiplex codes associated with the periodic traffic type
  • the user device is to transmit a SCI (e.g. a first stage SCI, or a second stage SCI, or a contiguous (single stage) SCI) associated with an aperiodic traffic type (e.g. associated with a block of data which are transmitted in an aperiodic manner, i.e. which are not part of a periodic transmission) using a the first code-division-multiplex code, and wherein the user device is to transmit a SCI (e.g.
  • a data block which may optionally comprise a SCI, e.g. a second stage SCI of a two-stage SCI
  • an aperiodic traffic type e.g. a block of data which is transmitted in an aperiodic manner, i.e.
  • a data block (which may optionally comprise a SCI, e.g. a second stage SCI) associated with a periodic traffic type (e.g. a block of data which are transmitted as a part of a periodic transmission) using the second code-division- multiplex code.
  • a data block which may optionally comprise a SCI, e.g. a second stage SCI
  • a periodic traffic type e.g. a block of data which are transmitted as a part of a periodic transmission
  • Embodiments according to the fifth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is configured to distinguish between information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) and information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) in dependence on a code-division-multiplex code which is associated with a respective information.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • the user device is to obtain control information (e.g. a “higher signaling message) (e.g. an RRC message or a SIB) (e.g. from a coordinating device) (different) signaling one or more code-division-multiplex codes used to transmit information associated with an aperiodic traffic type and one or more code-division-multiplex codes used to transmit information associated with a periodic traffic type.
  • control information e.g. a “higher signaling message” (e.g. an RRC message or a SIB) (e.g. from a coordinating device) (different) signaling one or more code-division-multiplex codes used to transmit information associated with an aperiodic traffic type and one or more code-division-multiplex codes used to transmit information associated with a periodic traffic type.
  • the user device is to determine whether a respective information is encoded using a code-division-multiplex code from a group (e.g. CDM group 1 ) of two or more code-division-multiplex codes associated with the aperiodic traffic type, or whether the respective information is encoded using a code-division-multiplex code from a group (e.g. COM group 0) of two or more code-division-multiplex codes associated with the periodic traffic type.
  • a group e.g. CDM group 1
  • code-division-multiplex code from a group (e.g. COM group 0) of two or more code-division-multiplex codes associated with the periodic traffic type.
  • the user device is to avoid (e.g. skip or abort) a further decoding of a respective information in response to finding that the respective information (e.g. a SCI) is encoded with a code-division-multiplex code associated with the periodic traffic type, and wherein the user device is to identify the respective information as being associated to the periodic traffic type in response to finding that the respective information (e.g. a SCI) is encoded with a code-division-multiplex code associated with the periodic traffic type.
  • the advantages of differentiating between aperiodic and periodic traffic in deciding whether to decode information such as SCI may correspond to those explained with respect to previous inventive concepts.
  • the differentiation between aperiodic and periodic traffic based on CDM codes may, however, be particularly fast, power saving, and easy to implement.
  • the user device may apply pattern recognition to predict resources occupied by periodic traffic and decode SCI of aperiodic traffic to identify resources occupied by aperiodic traffic.
  • the user device is to perform a further decoding of a respective information in response to finding that the respective information (e.g. a SCI) is encoded with a code-division-multiplex code associated with the aperiodic traffic type, in order to determine (e.g. using the further decoding) radio resources used (e.g by a further user device) for the transmission of aperiodic data (e.g. information of the aperiodic traffic type) (and to determine radio resources for the transmission of information by the present user device).
  • the respective information e.g. a SCI
  • a code-division-multiplex code associated with the aperiodic traffic type
  • the user device is to is to selectively apply a pattern recognition to information blocks recognized as being associated with the periodic traffic type, to recognize a transmission pattern of periodic traffic (and to use the recognized transmission pattern for making a decision when to transmit a data block).
  • the user device is to selectively decode control information (e.g. SCI) of information blocks recognized as being associated with the aperiodic traffic type (while not decoding control information of information blocks recognized as being associated with the periodic traffic type), to determine radio resources used for the transmission of information of the aperiodic traffic type by a further user device (and to determine radio resources for the transmission of information by the present user device).
  • control information e.g. SCI
  • Embodiment according to the fifth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to transmit information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) using a first power level, and wherein the UE is to transmit information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) using a second power level, wherein the first power level is different from the second power level.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the
  • the user device is to obtain control information (e.g. “higher level signaling message) (e.g. RRC message) (e.g. from a coordinating device) describing (different) transmit power levels for different traffic types.
  • control information e.g. “higher level signaling message” (e.g. RRC message) (e.g. from a coordinating device) describing (different) transmit power levels for different traffic types.
  • a transmit power level for information associated with the aperiodic traffic type and a transmit power level for information associated with the periodic traffic type differ by at least 1 dB, or by at least 2dB, or by at least 3dB.
  • the user device is to transmit reference symbols associated with information of different traffic types (e.g. aperiodic traffic type and periodic traffic type) (e.g. reference symbols of SCI associated with data blocks of different traffic types, and/or reference symbols of data blocks associated with different traffic types, and/or reference symbols of combined sidelink channel information and dada blocks) using different power levels.
  • the reference symbol may allow for a precise determination of the (relative) power level, as it may decrease the liability of the power level to a distance between the receiving and the transmitting user device or similar impairments like occlusions.
  • Embodiment according to the fifth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to distinguish between information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) and information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) in dependence on a power level which is associated with a respective information.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • the user device is to estimate a transmission power of information (e.g. a first stage SCI, or of data blocks, and/or or combined SCI and data blocks, and/or of reference symbols) transmitted by one or more further user devices, in order to distinguish between information associated with the aperiodic traffic type and information associated with the periodic traffic type.
  • information e.g. a first stage SCI, or of data blocks, and/or or combined SCI and data blocks, and/or of reference symbols
  • the user device is to consider an information about a distance from the one or more further user devices (e.g. d) when estimating the transmission power of information, and/or wherein the user device is to consider a channel information (e.g. a channel model coefficient, e.g. a) when estimating the transmission power of information.
  • a channel information e.g. a channel model coefficient, e.g. a
  • the user device is to compare an estimated transmission power associated with a received information (transmitted by one of the one or more further user devices) with a threshold level (which may, for example, be predetermined or which may, for example, be pre-configured, e.g. in dependence on a control information), and to decide whether the received information is associated with a periodic traffic type or with an aperiodic traffic type in dependence on a result of the comparison.
  • a threshold level which may, for example, be predetermined or which may, for example, be pre-configured, e.g. in dependence on a control information
  • the user device is to distinguish between data blocks associated with the aperiodic traffic type and data blocks associated with the periodic traffic type in dependence on power levels associated with the data blocks (e.g. without decoding the data blocks, and/or without decoding a SCI associated with the data blocks).
  • the user device is to distinguish between information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) and information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) in dependence on a power level of a reference symbols (e.g. described by a reference symbol received power information, e.g. RSRP) associated with the respective information.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • the user device is to selectively apply a pattern recognition (e.g. an intelligent technique, e.g. pattern recognition, artificial intelligence, machine learning, or the like) to information blocks recognized as being associated with the periodic traffic type, to recognize a transmission pattern of periodic traffic (and to use the recognized transmission pattern for making a decision when to transmit a data block).
  • a pattern recognition e.g. an intelligent technique, e.g. pattern recognition, artificial intelligence, machine learning, or the like
  • the user device is to selectively decode control information (e.g. SCI) of information blocks recognized as being associated with the aperiodic traffic type (while not decoding control information of information blocks recognized as being associated with the periodic traffic type), to determine radio resources used for the transmission of information of the aperiodic traffic type by a further user device (and to determine radio resources for the transmission of information by the present user device).
  • control information e.g. SCI
  • the advantages of differentiating between aperiodic and periodic traffic in deciding whether to decode information such as SCI may correspond to those explained with respect to previous inventive concepts.
  • the differentiation between aperiodic and periodic traffic based on power levels may, however, be particularly fast, power saving, and easy to implement. For example it may be particularly beneficial to combine the two previously described embodiments.
  • a sixth inventive concept relies on the idea, similar to the first inventive concept, that a transmission of a first stage SCI describing reserved resources may effectively prevent a selection of occupied resources.
  • the first stage SCI comprises a multi-use bit position which selectively comprises an indication of a traffic type or another transmission parameter.
  • the multi-use bit position has the advantage, that the transmission parameter, for which it is used may be selected flexibly, allowing for an efficient exploitation of data traffic. That is, a signaling of unnecessary data may be avoided. For example, in some situations it may be unnecessary to explicitly indicate the traffic type. In this case, for example, the multi-use bit position allows for signaling another transmission parameter. Further advantages are described with respect to the multi-use bit according to the first inventive concept, also with respect to the following embodiments.
  • Embodiments according to the sixth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to transmit a first stage SCI describing reserved resources for transmission of further information (e.g. comprising a second stage SCI), wherein the UE is to selectively provide, at one or more (common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g.
  • a field “traffic type” e.g.
  • one or more bits e.g., preferably, a single bit
  • a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter)
  • one or more bits e.g., preferably, a single bit
  • another transmission parameter e.g. flag indicating whether backward annotation is used or not.
  • the user device is to select, whether one or more bits indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are provided at the one or more multi-use bit positions in dependence on a on a higher layer signaling (e.g. in dependence on a signaling indicated using a radio resource control message (RRC message) or in dependence on a signaling indicated using a SCI); or wherein the user device is provide a signaling (e.g. a higher layer signaling, e.g.
  • a signaling e.g. a higher layer signaling, e.g.
  • a signaling in a radio resource control message or a signaling in a sidelink control channel indicating whether one or more bits indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are provided at the one or more multi-use bit positions.
  • the user device is to evaluate one or more bits (e.g., preferably, a single bit “traffictype indicator-SL”) of a radio resource control information or of a radio resource control message (e.g. of a radio resource control message related to or of radio resource control message portion), in order to decide whether to provide one or more bits (e.g., preferably, a single bit) indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits (e.g., preferably, a single bit) indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not).
  • a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter)
  • a transmission parameter e.g. flag indicating whether backward annotation is used or not.
  • the user device is to selectively provide one or more bits (e.g., preferably, only a single bit) indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier or a periodicity parameter), or one or more bits (e.g., preferably, only a single bit) indicating whether a backward indication is used or not, at the one or more multiuse bit position (e.g., preferably, at a same, shared single bit position).
  • bits e.g., preferably, only a single bit
  • the user device is to provide an information indicating which logical slots (e.g. which slots out of slots h.i,ho,Pi) are used for a data transmission if backward indication is used (wherein, for example, the user device may be configured to select which logical slots are used for the data transmission; wherein for example, the user device may be configured to decide whether one or more logical slots preceding the first stage SCI are used for data transmission or not).
  • logical slots e.g. which slots out of slots h.i,ho,Pi
  • backward indication wherein, for example, the user device may be configured to select which logical slots are used for the data transmission; wherein for example, the user device may be configured to decide whether one or more logical slots preceding the first stage SCI are used for data transmission or not).
  • the user device is to provide an information indicating which logical slots (e.g. which slots out of slots n.i,no,ni) are used for a data transmission using a reservation resource period field in the first stage SCI.
  • logical slots e.g. which slots out of slots n.i,no,ni
  • Embodiments according to the sixth inventive concept provide a user device, UE, for a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE is to communicate with one or more further UEs using a sidelink, SL, wherein the UE is to receive a first stage SCI describing reserved resources for transmission of further information (e.g. comprising a second stage SCI), wherein the UE is to selectively evaluate one or more (e.g. common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g.
  • a first stage SCI describing reserved resources for transmission of further information
  • further information e.g. comprising a second stage SCI
  • the UE is to selectively evaluate one or more (e.g. common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g.
  • a traffic type information indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not).
  • the user device is to select, whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position, or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not) on the basis of the one or more bits at the multi-use bit position, in dependence on a on a higher layer signaling (e.g. in dependence on a signaling indicated using a radio resource control message (RRC message) or in dependence on a signaling indicated using a SCI); or wherein the user device is provide a signaling (e.g. a higher layer signaling, e.g.
  • a signaling in a radio resource control message or a signaling in a sidelink control channel indicating whether one or more bits indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or one or more bits indicating another transmission parameter (e.g. flag indicating whether backward annotation is used or not) are to be provided at the one or more multi-use bit positions.
  • the user device is to evaluate one or more bits (e.g., preferably, a single bit “traffictype indicator-SL”) of a radio resource control information or of a radio resource control message (e.g. of a radio resource control message related to or of radio resource control message portion), in order to decide whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position, or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not) on the basis on the basis of the one or more bits at the multi-use bit position.
  • a traffic type information indicating whether a traffic is periodic or aperiodic
  • a traffic type identifier e.g. a traffic type identifier, or a periodicity parameter
  • the user device is to select whether to obtain a traffic type information indicating whether a traffic is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter) on the basis of the one or more bits at the multi-use bit position (e.g., preferably, on the basis of a single bit), or to obtain an information indicating whether a backward indication is used or not on the basis of the one or more bits at the multi-use bit position (e.g., preferably, on the basis of a single bit).
  • a traffic type information indicating whether a traffic is periodic or aperiodic e.g. a traffic type identifier, or a periodicity parameter
  • the user device is to obtain an information indicating which logical slots (e.g. which slots out of slots n.i,n 0 ,ni) are used for a data transmission if backward indication is used (wherein, for example, the user device may be configured to select which logical slots are used for the data reception; wherein for example, the user device may be configured to decide whether one or more logical slots preceding the first stage SCI are used for data reception or not).
  • logical slots e.g. which slots out of slots n.i,n 0 ,ni
  • the user device is to obtain an information indicating which logical slots (e.g. which slots out of slots n.i.no. ) are used for a data transmission using a reservation resource period field in the first stage SCI.
  • logical slots e.g. which slots out of slots n.i.no.
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE transmits a first stage SCI describing reserved resources for transmission of further information comprising a second stage SCI (and preferably for transmission of data), wherein the first stage SCI comprises an information (e.g. a traffic type identifier) indicating whether a traffic type is periodic or aperiodic.
  • a traffic type identifier indicating whether a traffic type is periodic or aperiodic.
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE receives a first stage SCI describing reserved resources for transmission of further information comprising a second stage SCI (and preferably for transmission of data), wherein the first stage SCI comprises an information (e.g. a traffic type identifier) indicating whether a traffic type is periodic or aperiodic; and wherein the UE uses the information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g. to determine radio resources used for a transmission of aperiodic traffic by a further user device).
  • an information e.g. a traffic type identifier
  • the UE uses the information indicating whether a traffic type is periodic or aperiodic for a selection of transmission resources (e.g. to determine radio resources used for a transmission of
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE senses radio resources (e.g. one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g. of control information or for a transmission of data)(wherein, for example, identifying radio resources for transmission by the present user device comprises excluding radio resources used for transmission by one or more further user devices from a selection of radio resources for transmission by the present user device), wherein the UE adjusts sizes (e.g.
  • a temporal size, like a sensing duration) of the one or more sensing windows in dependence on a zone information (e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types) and/or in dependence on a quality-of-service information (e.g. 5QI and/or ARP and/or RQA and/or notification control and/or flow bit rates and/or aggregate bit rates and/or default values and/or maximum packet loss rate resource type and/or priority level and/or packet delay budget and/or packet error rate and/or averaging window and/or maximum data burst volume).
  • a zone information e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types
  • a quality-of-service information e.g. 5QI and/or ARP and
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE senses radio resources (e.g. one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g. of control information or for a transmission of data)(wherein, for example, identifying radio resources for transmission by the present user device comprises excluding radio resources used for transmission by one or more further user devices from a selection of radio resources for transmission by the present user device) in a selection window, wherein the UE adjusts a size (e.g.
  • a temporal size) of the selection window in dependence on a zone information (e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types) and/or in dependence on a quality-of-service information (e.g. 5QI and/or ARP and/or RQA and/or notification control and/or flow bit rates and/or aggregate bit rates and/or default values and/or maximum packet loss rate resource type and/or priority level and/or packet delay budget and/or packet error rate and/or averaging window and/or maximum data burst volume).
  • a zone information e.g. zones associated with different geographical area and/or zones associated with different cast types and/or zones associated with different cases or use types and/or zones associated with different motion parameters and/or zones associate with different traffic types
  • a quality-of-service information e.g. 5QI and/or ARP and/or RQA and/or notification control and/
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE senses radio resources (e.g. one or more time-frequency regions) during one or more sensing windows, to identify radio resources for a transmission (e.g. of control information or for a transmission of data), wherein the UE uses a pattern recognition (e.g.
  • a recognition of a pattern describing a distribution of power or energy over time and/or over frequency and/or a recognition of a pattern describing a distribution of power or energy over a plurality of radio resources to recognize periodic traffic and/or aperiodic traffic (e.g. on the basis of a sidelink reference signal received power information obtained for a plurality of time-frequency portions of a radio resource, and/or on the basis of a receives signal strength information obtained for a plurality of time-frequency portions of a radio resource).
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE transmits information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) using a first code-division-multiplex code, and wherein the UE transmits information associated with a periodic traffic type (e.g.
  • an aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g.
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the US distinguishes between information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) and information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) in dependence on a code-division-multiplex code which is associated with a respective information.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE transmits information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) using a first power level, and wherein the UE transmits information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) using a second power level, wherein the first power level is different from the second power level.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE distinguishes between information associated with an aperiodic traffic type (e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself) and information associated with a periodic traffic type (e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself) in dependence on a power level which is associate with a respective information.
  • aperiodic traffic type e.g. a side link control information associated with aperiodic traffic data, or the aperiodic traffic data itself
  • a periodic traffic type e.g. a side link control information associated with periodic traffic data, or the periodic traffic data itself
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE transmits a first stage SCI describing reserved resources for transmission of further information (e.g. comprising a second stage SCI), wherein the UE selectively provides, at one or more (common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g.
  • one or more bits e.g., preferably, a single bit
  • a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter)
  • one or more bits e.g., preferably, a single bit
  • another transmission parameter e.g. flag indicating whether backward annotation is used or not.
  • Another embodiment provides a method for communicating in a wireless communication system, the wireless communication system including a plurality of user devices, UEs, wherein the UE communicates with one or more further UEs using a sidelink, SL, wherein the UE receives a first stage SCI describing reserved resources for transmission of further information (e.g. comprising a second stage SCI), wherein the UE selectively evaluates one or more (common, shared) multi-use bit positions of the first stage SCI (e.g. at a field “traffic type”) (e.g. at the same one or more bit positions, or at the same single bit position), to obtain a traffic type information indicating whether a traffic type is periodic or aperiodic (e.g. a traffic type identifier, or a periodicity parameter), or to obtain another transmission parameter (e.g. flag indicating whether backward annotation is used or not).
  • a traffic type information indicating whether a traffic type is periodic or aperiodic
  • another transmission parameter e.g.
  • the methods are based on the same considerations as the corresponding user devices. Moreover, the methods can be supplemented by any of the features, functionalities and details which are described herein with respect to the user devices, both individually and taken in combination.
  • Another embodiment according to any of the inventive concepts provides a computer program for performing any of the previously described methods when the computer program runs on a computer.
  • Fig. 1 illustrates a user device according to an embodiment
  • Fig. 2 illustrates two-stage SCI according to an embodiment
  • Fig. 3 illustrates a re-transmission of the first stage SCI according to an embodiment
  • Fig. 4 illustrates a user device according to an embodiment
  • Fig. 5 illustrates a user device according to an embodiment
  • Fig. 6 illustrates sensing windows according to embodiments
  • Fig. 7 illustrates a user device according to an embodiment
  • Fig. 8 illustrates a user device according to an embodiment
  • Fig. 9 illustrates sensing windows according to embodiments
  • Fig. 10 illustrates a pattern recognition according to an embodiment
  • Fig. 11 illustrates a user device according to an embodiment
  • Fig. 12 illustrates a user device according to an embodiment
  • Fig. 13 illustrates traffic type specific power levels according to an embodiment
  • Fig. 14 illustrates a user device according to an embodiment
  • Fig. 15 illustrates a user device according to an embodiment
  • Fig. 16 illustrates a user device according to an embodiment
  • Fig. 17 illustrates a resource selection scheme according to an embodiment
  • Fig. 18 illustrates pre-configured resource allocation according to an embodiment.
  • any embodiments as defined by the claims can be supplemented by any of the details (features and functionalities) described herein.
  • the embodiments described herein can be used individually, and can also optionally be supplemented by any of the details (features and functionalities) included in the claims.
  • individual aspects described herein can be used individually or in combination. Thus, details can be added to each of said individual aspects without adding details to another one of said aspects.
  • the present disclosure describes explicitly or implicitly features usable in wireless communication. Thus, any of the features described herein can be used in the context of wireless communication.
  • features and functionalities disclosed herein relating to a method can also be used in an apparatus (configured to perform such functionality).
  • any features and functionalities disclosed herein with respect to an apparatus can also be used in a corresponding method.
  • the methods disclosed herein can be supplemented by any of the features and functionalities described with respect to the apparatuses.
  • Fig. 1 illustrates a user device, UE 100 according to an embodiment.
  • the UE 100 is for a wireless communication system 10 which includes a plurality of user devices, UE, e.g. the UE 100 and a further UE 101.
  • the UE 100 is to communicate with one or more further UEs, for example the further UE 101 , using a sidelink, SL 102.
  • the UE 100 is to transmit a first stage sidelink control information (SCI) 110 describing reserved resources for transmission or further information comprising a second stage SCI.
  • the first stage SC1 110 comprises an information 114 indicating whether a traffic type is periodic or aperiodic.
  • Fig. 1 illustrates the UE 100 in the context of the communication system 10 and the further UE 101, it is pointed out that the UE 100 may be implemented independent of the wireless communication system 10 and the further UE 101.
  • the SL 102 may provide a direct communication channel between the UE 100 and the further UE 101.
  • the SL 102 may be attributed one or more frequency bands.
  • the UE 100 may use or require resources of the SL 100 for transmitting information.
  • a resource may refer to a radio resource which may represent a frequency sub-band of the SL 102 and a time slot for occupying the respective frequency sub-band.
  • a resource may refer to a time-frequency region.
  • a resource may comprise one or more resource blocks, each resource block referring to a frequency sub-band of the SL 102 and a time slot.
  • the UE 100 may indicate resources which the UE 100 may have selected for the transmission of the further information. In other words, the UE 100 may select and reserve resources for transmission of further information. The resources indicated for transmission of the further information may thus be referred to as reserved resources.
  • the further UE 101 may receive the first stage SCI 110, and may use the information 114 when selecting resources on its part. The information 114 may allow or support the further UE 101 to select resources which are preferably different from the resources reserved by the UE 100. Consequently, interference of transmissions by the UE 100 and the further UE 101 may be avoided.
  • the reserved resources may refer to resources of separate time slots which may be consecutive (or continuous) or which may be separated in time.
  • the reserved resources for transmission of the further information may refer to temporally separated resources which are periodic in time, e.g. equally spaced in time.
  • the traffic type for transmission of the further information may be referred to as periodic.
  • the traffic type of the transmission of the further information may be referred to as aperiodic.
  • the reserved resources may refer to a continuous time slot within which the further information is transmitted.
  • the reserved resources described by the first stage SCI 110 may be temporally separated from a time slot, within which the first stage SCI is transmitted, or the first stage SCI 110 and the reserved resources may be continuous.
  • the further information, for which the reserved resources may be designated may optionally comprise a transport block comprising data, i.e. data to be transmitted, e.g. payload data.
  • the first stage SCI and/or the second stage SCI may comprise information about the data of the transport block, e.g. information about how to decode or demodulate the transport block.
  • the data may comprise one or more messages.
  • the UE 100 may be part of a vehicle, and data to be transmitted may comprise information about a movement of the vehicle, e.g. position, speed, direction. In case that these parameters do not change, or change slowly or constantly, it may be sufficient to transmit the information at the time instants scheduled for a periodic traffic type. Otherwise, e.g. in case of unpredicted changes of the movement of the vehicle, e.g. strong breaking, it may be beneficial to transmit the information about the vehicle before the next upcoming scheduled transmission, causing aperiodic traffic.
  • the UE 100 may obtain data to be transmitted, e.g. as part of the further information, and may further receive a higher level signaling (or higher layer signaling).
  • the higher level signaling may comprise information about how to transmit data.
  • the higher level signaling may relate to a specific data transmission or may comprise general instructions for data transmission.
  • the higher layer signaling may, for example, be a signaling in a higher protocol layer, which is higher than a physical layer, e.g. a signaling in an application layer or in a presentation layer or in a session layer or in a transport layer.
  • Fig. 2 illustrates periodic and aperiodic traffic according to an embodiment.
  • Fig. 2 shows a time frequency diagram.
  • a region within the time frequency diagram may be referred to as a resource.
  • a first stage SCI 110a is transmitted during a time period 111a.
  • the first stage SCI 110a describes reserved resources 120a.
  • the information transmitted in the reserved resource 120a comprises a second stage SCI 130a.
  • the information transmitted in the reserved resource 120a may further comprise data 140a.
  • the reserved resource 120a may cover a time slot 121a and a frequency sub-band 112a.
  • the first stage SCI 110a may describe the reserved resources 120a by indicating the time slot 121a and the frequency sub-band 112a.
  • the time slot 121a may be indicated by indicating a time difference between the time slot 121a and the time period 111 a of the transmission of the first stage SCI 110a.
  • the first stage SCI 110a may indicate the time slot 121a by an absolute time indication.
  • the frequency sub-band 112a may, for example, be indicated by a selection of resource blocks, or a sub-channel.
  • the reserved resources 120a may cover a continuous time slot and no retransmissions may be scheduled at the moment of the transmission of the first SCI 110a.
  • the information transmitted in the reserved resource 120a may be an example of an aperiodic traffic type.
  • Fig. 2 further shows an example for a periodic traffic.
  • a first stage SCI 110b is transmitted.
  • the first stage SCI 110b indicates reserved resources 120b.
  • the reserved resources 120b comprise first reserved resources 122-1 and second reserved resources 122-2.
  • the reserved resources 120 may cover a frequency sub-band 112b of the SL 102.
  • the first reserved resources 122-1 cover a time slot 121 b-1 , which may be temporally separate from a time slot 121 b-2 of the second reserved resources 122-2.
  • the reserved resources 120b together include the further information to be transmitted.
  • the first reserved resources 122-1 comprise a second stage SCI 130b and further comprises data 142-1.
  • the second reserved resources 122-2 comprise data 142-2.
  • the data 142-2 may refer to similar data as the data 142-1.
  • the data 142-2 may comprise an updated version of at least a part of the data 142-1 .
  • Resources for transmitting data may be referred to as transport blocks.
  • the location of the second stage SCI 130a, 130b within the respective reserved resources 120a, 120b as shown in Fig. 2 is exemplary.
  • the second stage SCI 130a, 130b may not cover the entire frequency sub-band 112a, 112b, but may be located within one or more resource blocks representing a sub-band of the frequency sub-band 112a, 112b.
  • the second stage SCI 130b of the reserved resources 130b of the periodic traffic case may be repeated or renewed, for example partially, within the individual reserved resources 122-1 , 122-2.
  • several or each of the individual reserved resources may comprise respective SCI, which do not necessarily comprise the same set of parameters or information, but may comprise at least partially the same parameters or information.
  • a later reserved resource may comprise an updated information or an updated value of a parameter of the SCI.
  • the time slots 121 b-1 , 121 b-2 may be indicated in the first stage SCI 110b by indicating by a resource reservation period parameter, which may describe the time interval for the reoccurrence of the reserved resources 122-1 , 122-2, and may be further described by a periodicity parameter, which may describe a number of reoccurrences of the reservation of the resource.
  • the first stage SCI 110a, 110b may be examples for, or may correspond to, the first stage SCI 110.
  • the second stage SCI may comprise information about the transmission of data comprised in the reserved resources, e.g. the data 140a, 140b.
  • the second stage SCI may comprise an information about a modulation and coding scheme used to transmit the data.
  • the UE 100 is to transmit data in a manner signaled by the first stage SCI and by the second stage SCI.
  • the UE 100 may include an information about resources reserved for a transmission of data having an aperiodic traffic type into the first stage SCI 110
  • the information about resources may describe a time slot of the resources and/or a frequency sub-band of the resources, e.g. the time slot 121a and the frequency sub-band 112a.
  • the UE 100 is to include an information about resources reserved for a transmission of the second stage SC1 130a, 130b into the first stage SCI 110.
  • the UE 100 may be to include an information about the resources reserved for a transmission of a block 120a, 122-1 comprising both, the second stage SC1 130a, 130b and data 142-1 into the first stage sidelink control information.
  • the LJE 100 is to include an information describing a priority of data into the first stage SC1 110.
  • the priority may represent or may be assigned based on an urgency or a relevance of data.
  • the information describing the priority may rate the priority of the data using a priority value or a priority parameter.
  • the information describing the priority of the data may comprise a priority indicator which signals that the data has a predetermined priority, for example a high priority.
  • the UE 100 may include the information describing the priority of data into the respective first stage SCIs 110 of each data transmission, signaling a classification of the priority of the data of the respective data transmission.
  • the UE 100 may include the information describing the priority into the first stage SCIs, e.g. only into the first stage SCIs, for data transmissions having one of predetermined classifications of the priority.
  • the UE 100 may include the information describing the priority into the respective first stage SCIs of data transmissions having a high priority.
  • the further UE 101 may upon receipt of the first stage SCI 110 indicating the priority of data to be transmitted and the resources described by the first stage SCI 110 consider the information describing the priority of the data in its selection of resources for data transmissions. Thus, the further UE 101 may exclude the resources reserved for the data transmission associated to the first stage SCI 110 from the candidate resources from which the further UE 101 may select reserved resources for a data transmission.
  • the UE 100 is to transmit the second stage SCI temporally after a transmission of the first stage SCI 110.
  • the first stage SCI may be transmitted temporally ahead of the second stage SCI.
  • the UE 100 may select the reserved resources for transmitting the data.
  • the selection of the reserved resources may be performed according to a selection scheme, for example, the scheme described with respect to Fig. 17 and/or the selection 1650 according to Fig. 16.
  • the UE 100 may transmit the first stage SCI 110 describing the reserved resources.
  • the UE 100 may announce the transmission of data using the reserved resources to the further UEs 101.
  • the data to be transmitted may be attributed a packet latency requirement, which may indicate a point in time until which the data is to be transmitted.
  • the packet latency requirement may indicate a maximum delay between obtaining the data for transmission or a transmission of the first stage SC1 110 and a transmission of the data.
  • the UE 110 may consider the packet latency requirement in the selection of the reserved resources, e.g. in the choice of a selection window, so that the reserved resources for the data transmission are within a time span indicated by the packet latency requirement.
  • the packet latency requirement may, for example, be set by a Packet Delay Budget (PDB).
  • PDB Packet Delay Budget
  • the packet latency requirement may indicate a time span within which the data is to be transmitted. The duration of the time span may depend on the priority of the data.
  • Fig. 3 illustrates a retransmission of the first stage SCI 110a according to an embodiment.
  • Fig. 3 shows a time frequency diagram indicating the transmission of the first stage SCI 110a and the reserved resources 120a described by the first stage SCI 110a.
  • the first stage SCI 110a is retransmitted after a first transmission of the first stage SCI 110a and before the transmission of the reserved resources 120a comprising the second stage SCI, and optionally also the data to be transmitted.
  • the further UE 101 may be able to receive the information comprised in the first stage SCI 110a even if the UE 101 is not able to receive or to decode the first transmission of the first stage SCI 110a, for example due to impairment of the first transmission of the first stage SCI 110a.
  • a packet delay budget 318 is indicated.
  • the PDB 318 may represent a time span, within the second stage SCI 120a is scheduled to be transmitted.
  • the one or more retransmissions of the first stage SCI 110a may be temporally located between the first transmission of the first stage SCI 110a and the transmission of the reserved resources 120a.
  • the UE 100 may selectively retransmit the first stage SCI 110 in case of an aperiodic transmission.
  • data which is related to unpredicted evens may have a high relevance or may be very urgent.
  • it may be transmitted using aperiodic traffic type.
  • the UE 100 may retransmit the first stage SCI 110a.
  • the first stage SCI 110 may further indicate the information describing the priority of the data in case the traffic type is aperiodic.
  • the UE 100 may retransmit the first stage SCI in dependence on the priority of the further information to be transmitted.
  • the retransmission of the first stage SCI 120a may be a blind retransmission, as indicated in Fig. 3. That is, for example, the UE 110 may perform the retransmission of the first stage SCI 110a without relying on information which indicates whether the further UE 101 was received and/or was able to decode the first transmission of the first stage SCI 110a.
  • the UE 100 may retransmit the first stage SCI 110a one or multiple times. In some examples, the UE 100 is to adjust the number of retransmissions of the first stage SCI 110 in dependence on a higher level signaling or any dependence on a system information block.
  • the first stage SCI 110 may be associated with a transport block, e.g. resources for transmitting data.
  • the transport block associated with the first or initial transmission of the first stage SCI 110a and the transport block associated with a retransmission of the first stage SCI 110a may be the same, or may differ.
  • the information 114 indicating whether the traffic type is periodic or aperiodic may be implicitly or explicitly comprised in the first stage SCI 110.
  • the information 114 may implicitly be comprised in the description of the reserved resources, for example in the information about resources reserved for a transmission of the second stage SCI or the block comprising both, the second stage SCI and data.
  • An implicit signaling may refer to a signaling without including a parameter which is explicitly dedicated to the signaling of the information 114 into the first stage SCI 110.
  • the UE 100 is configured to implicitly signal an aperiodic traffic type using a resource reservation period parameter and/or using a periodicity parameter.
  • the resource reservation period parameter and/or the periodicity parameter may be included in the first stage SCI 110, for example, for describing the reserved resources.
  • the resource reservation period parameter may describe a time interval between the periodic data transmissions and the periodicity parameter may indicate a number of repetitions of data transmissions.
  • a predetermined value for the resource reservation period parameter and/or a predetermined value for the periodicity parameter may implicitly indicate that the traffic type is aperiodic.
  • the predetermined values may, for example, be zero or other predetermined values, and may be referred to as a disabled value.
  • the UE 100 may set a periodicity parameter to a disabled value in order to signal an aperiodic traffic type.
  • the UE 100 is configured to provide the information 114 in dependence on a higher level signaling or a higher layer signaling.
  • a high level signaling or a high layer signaling may indicate that aperiodic traffic is disabled or enabled, and the UE 100 may selectively include the information 114 into the first stage SCI, if the aperiodic traffic type is enabled.
  • the UE is configured to provide the first stage SCI 110 such that the first stage SCI 110 is associated with an immediately subsequent transport block.
  • the UE 100 is configured to provide the first stage SCI 110 such that the first stage SCI 110 is associated with an associated transport block, such that there are one or more transport blocks between the first stage SCI 110 and the associated transport block or such when there is a time gap between the first stage SCI 110 and the associated transport block.
  • the UE 100 may transmit the data to be transmitted in the transport block associated with the first stage SCI. This may allow for a fast communication of the data to be transmitted to the further UE 101.
  • the data may be retransmitted in the transport block associated with the second stage SCI 130 in the reserved resources 120. If the data was not received by the further UE 101 with the transport block associated to the first stage SCI 110, e.g. due to impairment, the further UE 101 may receive the data from the transport block associated with the second stage SCI 120.
  • the information 114 indicating whether a traffic type is periodic or aperiodic may be represented by a dedicated information, e.g. one or more dedicated bits of the first stage SCI 110, which may represent an aperiodic flag.
  • the aperiodic flag may refer to a bit in the first stage SC1 110, wherein the bit is dedicated for indicating whether the traffic type is periodic or aperiodic.
  • the first stage SCI 110 may comprise the resource reservation period parameter.
  • the UE 100 may use the resource reservation period parameter to indicate a transmission time and/or a transmission frequency of the aperiodic traffic in the resource reservation period parameter in the first stage SCI 110.
  • the transmission time may indicate the time slot 121a of the reserved resources 120 for the aperiodic traffic.
  • the UE 100 may provide the aperiodic flag indicating whether the traffic type is periodic or aperiodic in dependence on a high level signaling.
  • the UE 100 may include the information 114 in the first stage SCI 110 implicitly or explicitly or not in dependence on the higher level signaling.
  • the traffic type may be interpreted to be aperiodic.
  • the resource reservation period and/or the periodicity parameter may depend on high level signaling.
  • the first stage SCI comprises one or more multi-use bit positions.
  • the UE 110 may use the multi-use bit positions to selectively provide one or more bits indicating whether a traffic type is periodic or aperiodic, or to provide one or more bits indicating another transmission parameter.
  • the information 114 may be indicated by the multi-use bit position.
  • the UE 100 may decide about the type of usage of the multi-use bit positions according to a higher level signaling. Alternatively, the UE 100 may provide a signaling indicating whether one or more bits indicating whether a traffic type is periodic or aperiodic, or one or more bits indicating another transmission parameter are provided in the one or more multiuse bit positions. In other words, for example, in case the UE 100 may decide over a usage of the one or more multi-use bit positions, the UE 100 may signal an information about the type of information signal by the one or more multi-use bit positions.
  • UE 100 is to evaluate one or more bits of a radio resource control information or of a radio resource control message in order to decide whether to provide one or more bits indicating whether a traffic type is periodic or aperiodic, or one or more bits indicating another transmission parameter.
  • the radio resource control information or the radio resource control message may be examples of higher level signaling.
  • the other transmission parameter which may be indicated in the multi-use bit position may be a parameter for indicating whether backward indication is used or not.
  • the one or more multi-use bit positions may be used for indicating the backward indication, in case the information 114 is implicitly signaled in the first stage SCI 110, for example in the resource reservation period parameter or the periodicity parameter.
  • higher level signaling may indicate, whether the multi-use bit position refers to periodic or aperiodic traffic, or refers to backward indication.
  • the UE 100 may use the multi-use bit position to indicate, whether backward indication is used or not.
  • the resources indicated by the reservation resource period parameter and/or the periodicity parameter may depend on whether backboard indication is used or not. For example, if the UE 100 indicates in the multi-use bit position, that backboard indication is used, for the exemplary number of two transmissions, slot no and a slot may be used.
  • the slots no and ni may refer to logical slots which are temporally after the first stage SCI 110, for example, in the same frequency sub-band.
  • each of backboard indication may mean, that slots n.-i, n 0 and are used for the three transmissions.
  • n.i may be a logical slot which is located temporally before the first stage SCI.
  • the UE 100 may use the multi-use bit position to indicate, to which resources the logical slots indicated by the reservation resource period parameter refer.
  • T raffictype indicator-SL An example of a multi-use bit indicating traffic type or backward indication is given by the T raffictype indicator-SL in section 2.3.1.
  • the UE 100 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the two-stage SCI may be implemented independently from other features of the UE, such as the selection and/or sensing window, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in sections 1.1 and 1.2 may be combined with any features of further embodiments of UE described in the following.
  • the UE 100 may be implemented as described in section 2.3.1. 1.2 User Device 400 according to Fig 4.
  • Fig. 4 shows a UE 400 according to an embodiment.
  • the UE 400 may optionally be part of the communication system 10 which may include a plurality of user devices, e.g. the UE 400 and a further UE 401.
  • the UE 400 may communicate with one or more further UEs, e.g. the UE 401 , using a sidelink 402.
  • the further UE 401 may, for example, correspond to the UE 100 as described with respect to Fig. 1.
  • the sidelink 402 may be a sidelink according to the sidelink 102 of Fig. 1.
  • the UE 400 may correspond to the UE 101 of Fig. 1.
  • features, functionalities and details described in section 1 with respect to the UE 100, and/or the further UE 101 may optionally be combined with the UE 400 individually or in combination.
  • the UE 400 may receive a first stage SCI 410, which may correspond to the first stage SCI 110 transmitted by the UE 100.
  • the first stage SCI 410 describes the reserved resources for a transmission of further information comprising a second stage SCI.
  • the first stage SCI 410 comprises an information 414, e.g. the information 114, indicating whether a traffic type is periodic or aperiodic.
  • the UE 400 comprises a resource selection module 450 configured to use the information 414 for a selection of transmission resources 420.
  • the UE 400 may use the selected transmission resources 420 for a transmission of data. That is, the UE 400 may reserve the transmission resources 420 for a data transmission, for example as described with respect to the UE 100 in section 1.
  • the transmission resources or reserved resources 420 may correspond to the reserved resources 120a, 120b of Fig. 2.
  • the UE 400 may select the transmission resources 420 so that the transmission resources 420 do not overlap with the reserved resources described in the first stage SCI 410.
  • the UE 400 may use the information 414 to decide whether to evaluate the second stage SCI or not.
  • the second stage SCI for example, the second stage SCI 130a described with respect to Fig. 2, may comprise information about a transport block, e.g. the transport block 140a, of the reserved resources described by the first stage SCI 410.
  • the UE 400 may infer which resources are reserved for a transport block associated with the second stage SCI described by the first stage SCI 410. Based on the evaluation of the second stage SCI 130a, the UE 400 may consequently avoid selecting resources overlapping with the transport block 140a as the transmission resources 420.
  • the first stage SCI 410 may comprise information describing radio resources used for the transmission of the data block 140a by the further UE 401.
  • the first stage SCI 410 may further comprise information describing radio resources used for the transmission of the second stage SCI 130a by the further UE 401.
  • the UE 400 may selectively evaluate the information describing the radio resources used for the transmission of the data block 140a by the further UE 401 and/or the information describing radio resources used for the transmission of the second stage SCI 130a by the further UE 401 if the first stage SCI 410 indicates an aperiodic traffic type.
  • the UE 400 may selectively evaluate the second stage SCI 130a if the first stage SCI 410 indicates an aperiodic traffic type. For example, the latter may be the case if information describing the data block 140a is part of the second stage SCI 130a.
  • the UE 400 may avoid selecting resources which overlap with the resources occupied by the second stage SCI 130a or the transport block 140a as the transmission resources 420.
  • the UE 400 may extract the information describing radio resources used for the transmission of the second stage SCI 130a from the first stage SCI 410. Additionally or alternatively, the UE 400 may extract the information describing the radio resources used for the transmission of the data block 140 of an aperiodic traffic type from the first stage SCI 410 and/or the second stage SCI 130a. The UE 400 may extract the information describing the radio resources used for the transmission of the second stage SCI 130a and/or the data block 140a either independently of whether the traffic type is periodic or aperiodic, or may extract said information selectively if the traffic type is aperiodic.
  • the UE 400 may use a patent recognition to recognize a periodic traffic pattern.
  • the UE 400 may sense traffic received via the SL 402 during a sensing window, for example a past time span.
  • the UE 400 may recognize periodic traffic in the sensing window and may predict, based on the periodic traffic pattern of periodic traffic, radio resources used for periodic traffic after an end of the sensing window.
  • the UE 400 may obtain information about radio resources used for periodic traffic without relying on information about the radio resources of the periodic traffic indicated in SCI, for example the first stage SCI 410.
  • the UE 400 may predict radio resources used for periodic traffic without decoding SCI associated with individual data blocks of the periodic traffic.
  • the information 414 indicating whether the traffic type is periodic or aperiodic may either be implicit or explicit, for example equivalent to the description of the information 114 in section 1.
  • the information 414 may be implicitly indicated in a resource reservation period parameter and/or a periodicity parameter, which may correspond to the respective parameters described in section 1. Consequently, the UE 400 may evaluate the resource reservation period parameter and/or the periodicity parameter in order to obtain the information 414.
  • the UE 400 may recognize the traffic to be aperiodic if the periodicity parameter is set to a disabled value.
  • the UE 400 may provide a higher level signaling.
  • the indication that the traffic type is aperiodic may, for example, cause a predetermined data handling of the data transmitted by the aperiodic traffic.
  • the data may be handled with a high priority.
  • the reserved resources 120a or the reserved resources 120b may be an example for the reserved resources described by the first stage SCI 410. Accordingly, features, functionalities and details described with respect to the reserved resources 120a, 120b in section 1 may equivalently apply to the reserved resources described by the first stage SCI 410.
  • the first stage SCI 410 may comprise the information 414 explicitly, as described with respect to the information 114.
  • the UE 400 may be configured to evaluate the first stage SCI 410 for the explicitly signaled information 414.
  • the UE 400 may evaluate the resource reservation period parameter of the first stage SCI 410 for a transmission time and/or a transmission frequency of an aperiodic traffic.
  • the UE 400 may derive from the value of the periodicity parameter that the traffic type is aperiodic and may derive the transmission time and/or the transmission frequency of the aperiodic traffic from the resource reservation period parameter.
  • the information 414 may be signaled, for example, in the form of an aperiodic flag, in a multi-use bit in the first stage SCI 410.
  • the multi-use bit may correspond to the multi-use bit described in section 1.
  • the multi-use bit may, for example, alternative to the aperiodic flag, comprise an information about another transmission parameter, for example a flag indicating whether backward indication is used or not.
  • the UE 400 may receive a radio resource control information or a radio resource control message indicating the type of information indicated by the multi-use bit for first stage SCI 410.
  • the UE 400 may decide on the basis of the radio resource control information of the radio resource control message whether the multi-use bit indicates a traffic type information indicating whether the traffic type is periodic or aperiodic, or whether the multi-use bit indicates another transmission parameter, for example the backward indication.
  • the backward indication may correspond to the backward indication described in section 1 . Accordingly, the UE 400 may obtain an information about logical slots or resources used for a data transmission in dependence on the backward indication, as described in section 1
  • the UE 400 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the two-stage SCI may be implemented independently from other features of the UE, such as the selection and/or sensing window, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in sections 1.1 and 1.2 may be combined with any features of further embodiments of UE described in the following.
  • the UE 400 may be implemented as described in section 2.3.1. 1.3 User Device 500 according to Fig. 5 and Fig. 6
  • Fig. 5 shows a user device 500 according to an embodiment.
  • the user device 500 may optionally be part of a communication network 10 comprising a plurality of user devices, for example, a UE 501 and the UE 500.
  • the further UE 501 may correspond to the UE 500 or may be similar to the UE 500.
  • the UE 500 and/or the UE 501 may correspond to the UE 100 or the UE 400 described with respect to Figs. 1 to 4.
  • the UE 500 may communicate with the further UE 501 using a sidelink 502.
  • the SL 502 may correspond to the SL 102, 402.
  • the UE 500 senses radio resources 570 during a sensing window 552 or more sensing windows, to identify radio resources 520 for a transmission.
  • the UE 500 is to adjust a size of the sensing window 552 or sizes of more sensing windows in dependence on information 504.
  • the information 504 may include a zone information and/or a quality of service information.
  • the radio resources 520 and 570 may represent blocks or regions in a time-frequency space, as described with respect to the resources, e.g. the resources 120a, 120b, in section 1.
  • the UE 500 may evaluate the radio resources 570 sensed during the sensing window 552 to anticipate or estimate which upcoming radio resources may be free for a transmission period. For example, the UE 500 may detect which of the radio resources 570 during the sensing window 552 are occupied to predict the occupation of upcoming radio resources.
  • the radio resources 570 may comprise occupied radio resources 572 which may comprise information about reserved resources beyond the upcoming resources.
  • the resources 572 may describe the reserved resources as described with respect to the first stage SCI in section 1.
  • the UE 500 may also use information of the reserved resources 572 to identify free radio resources beyond the upcoming resources. In other words, the UE 500 may evaluate, which of the resources 570 are occupied and/or may evaluate first stage SCI of all or some of the resources 570.
  • the sensing window 552 has a size 554, which may define a time span.
  • the sensing window 552 may be located in time before the present time of operation.
  • the sensing window 552 may end at the present time of operation or before the present time of operation, so that there may be a gap between the sensing window and the present time of operation. While the size 554 of the sensing window 552 is constant, the distance between the sensing window 552 and the present time of operation may be constant. That is, the sensing window 552 may move with the present time of operation.
  • the sensing window 552 may be a long-term sensing window or a short-term sensing window. In comparison to a long-term sensing window, a short-term sensing window may start less far in the past. In some examples, a short-term sensing window may be located temporally between a long-term sensing window and the present time of operation.
  • a short-term sensing window may be particularly beneficial for sensing resources occupied by a specific traffic type, for example aperiodic traffic.
  • the UE 500 may detect, during a short-term sensing window a first stage SCI message and may be identified, based on the first stage SCI message, occupied resources beyond the upcoming resources.
  • the UE 500 may be assigned to or may operate in one of multiple zones.
  • the zone may depend on a cast type, for example unicast, multicast or broadcast.
  • the zone may further depend on an operational mode or a use case of an application associated with the UE 500.
  • the UE 500 may be part of a vehicle; for example, the vehicle may operate in a platooning mode, a remote driving mode, in a mode with extended sensors or an advanced driving mode.
  • the zone assigned to the UE 500 may be indicated in the zone information.
  • the zone information may be signaled by a higher layer signaling or a higher level signaling, for example radio resource control signaling.
  • the zone information may be preconfigured, for example based on traffic QOS requirements.
  • Fig. 6 illustrates examples with differently sized sensing windows according to an embodiment.
  • Fig. 6 shows a time-frequency diagram indicating for each of a first zone 682, a second zone 684, and a third zone 686, a temporal arrangement of sensing windows.
  • a long-term sensing window 656 is indicated.
  • the longterm selection window 656 may start before the selection process for the resources 520, which are to be selected for a transmission, is triggered.
  • the point in time, at which the selection process is triggered is indicated as n.
  • the UE 500 may select the resources 520 from a resource selection window 660.
  • the resource selection window 660 is temporally located after the resource selection trigger n.
  • the long-term sensing window 656 may continue after the resource selection trigger.
  • the UE 500 may process the resources sensed during the long-term sensing window 656 and optionally resources sensed during further sensing windows.
  • the selection process may be performed similar as described with respect to Fig. 17 in section 2.2 for one sensing window.
  • one or more short-term sensing windows 658 are defined.
  • the starting point and the end point of a short-term sensing window 658 may be temporally located before or after the resource selection trigger n.
  • a first short-term sensing window located before the resource selection trigger n there is a first short-term sensing window located before the resource selection trigger n.
  • a second short-term sensing window 658 may start before the resource selection trigger and may end after the resource selection trigger.
  • a third short-term sensing window 658 may be arranged temporally after the long-term sensing window 656. For example, the short-term sensing window 658 may overlap with the resource selection window 660.
  • the long-term sensing window 656 of the second zone 684 is shorter.
  • the UE 500 may adjust the size of the long-term sensing window 656 in dependence on the zone information. Alternatively or additionally, the UE 500 may adjust the size of the long-term sensing window 656 in dependence on a quality of service information.
  • the UE 500 may adjust a number and/or respective sizes of one or more shortterm sensing windows 658 in dependence on the zone information and/or in dependence on the quality of service information.
  • the short-term sensing windows 658 may be examples of a sensing window which is used for identifying radio resources reserved for a transmission of data of an aperiodic traffic type.
  • the long-term sensing window 656 may be an example for a sensing window which is used for identifying radio resources reserved for a transmission of data of a periodic traffic type. Accordingly, the UE 500 may adjust the size of a sensing window which is used for a determination of radio resources used by one or more further user devices for a transmission of data of an aperiodic traffic type in dependence on the zone information and/or in dependence on the quality of service information.
  • the UE 500 may adjust the size of a sensing window which is used for a determination of radio resources used by one or more further user devices for a transmission of data of a periodic traffic type in dependence on the zone information and/or in dependence on the quality of service information.
  • the UE 500 may receive the zone information from a higher level signaling, for example the radio resource control signaling.
  • the UE 500 may map the zone information onto a sensing window scheme.
  • the sensing window scheme may define sizes of one or more sensing windows.
  • a sensing window scheme may optionally define a number of sensing windows, for example a number of long-term sensing windows and a number of short-term sensing windows, and may define, for each of the sensing windows, a respective size.
  • the UE 500 may adjust the size 554 of the sensing window 552 in dependence on the data or one or more attributes of the data to be transmitted. For example, the UE 500 may adjust the size 552 in dependence on one or more of a resource type, a priority, a packet delay budget, a permissible packet error rate, and a maximum data burst volume. Alternatively or additionally, the UE 500 may adjust the size 552 in dependence on characteristics of an averaging window.
  • the information 504 may comprise a quality of service information.
  • the quality of service information may, for example, be represented or comprise a 5QI quality of service value.
  • the 5QI quality of service value may, for example, be associated with one or more of the above-described attributes of the data to be transmitted and/or characteristics of an averaging window.
  • the information 504 may comprise a configuration information describing one or more sensing window sizes associated with one or more quality requirements.
  • the one or more quality requirements may relate to quality requirements for the data to be transmitted.
  • the UE 500 may comprise a predetermined table for mapping each of a plurality of sets of quality requirements onto one or more associated sensing window sizes or sensing window schemes.
  • An example for the predetermined table may be Table 1 of section 2.3.2.2, wherein the 5QI value may represent the quality requirement
  • the UE 500 may set entries of a table, for example the predetermined table, or a further variable table, the table mapping each of a plurality of sets of quality requirements onto one or more associated sensing window sizes, or sensing window schemes, in response to reception of a configuration information.
  • the configuration information may be part of the information 504.
  • the UE 500 may adapt the table based on the information 504 and may adjust the sensing window size 554 based on the table.
  • the UE 500 may correspond to the embodiment of section 2.3.2.
  • the UE 500 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the number and the type of sensing windows may be chosen independently from other features of the UE, such as the selection window, two-stage SCI, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in section 1.3 may be combined with any features of the UE 100, 400 and further embodiments of the UEs described in the following.
  • Fig. 7 illustrates a user device 700 according to an embodiment.
  • the user device 700 may optionally be part of the wireless communication system 10, which may include a plurality of user devices, for example the UE 700 and a further UE 701.
  • the UE 700 may communicate with the further UE 701 using an SL 702.
  • the UE 700 and/or the UE 701 may correspond to any of the UE 100, 400, 500.
  • the further UE 701 may be similar to or may correspond to the UE 700.
  • the SL 702 may be a sidelink as described with respect to the SL 102 in section 1.
  • the UE 700 is to sense radio resources 770 during one or more sensing windows 752, to identify radio resources 720 for a transmission in a selection window 762.
  • the selection window 762 has a size 764.
  • the UE 700 may adjust the size 764 of the selection window 762 in dependence on information 704.
  • the information 704 may comprise a zone information and/or a quality of service information.
  • the information 704 may comprise some or all of the information which may be included in the information 504 as described in section 3. Further, the UE 700 may obtain the information 704 in a way as described with respect to the information 504 in case of the UE 500. However, in case the UE 700 corresponds to the UE 500, the information 504 for adjusting the sensing window 552 is not necessarily the same the information 704 for adjusting the selection window 762. Rather, the selection window and the one or more sensing windows may be adjusted individually from each other.
  • the UE 700 may map the zone information, which may be included in the information 704, onto the size 764 of the selection window 762.
  • the selection window 762 may correspond to the scheduling window 662 or the resource selection window 660 as described with respect to Fig. 6.
  • the selection window may depend on a packet delay requirement or a PDB associated with the data, for which the resources are selected.
  • the packet delay requirement may define the end of the selection window 764.
  • the UE 700 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the selection windows may be chosen independently from other features of the UE, such as the sensing windows, two-stage SCI, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in section 1.4 may be combined with any features of the UE 100, 400, 500 and further embodiments of the UEs described in the following.
  • Fig. 8 shows a UE 800 according to an embodiment.
  • the UE 800 may optionally be part of a communication system 10, which may include a plurality of user devices, e.g. the UE 800 and a further UE 801 .
  • the UE 800 may communicate with a further UE 801 via an SL 802.
  • Each of the UE 800 and the UE 801 may correspond to any of the UE 100, the UE 400, the UE 500 and the UE 700 according to Figs. 1 to 7.
  • the SL 802 may correspond to the SL 102.
  • the UE 800 senses radio resources 870, for example radio resources of the SL 802, during a sensing window 852 and optionally during further sensing windows, to identify radio resources for a transmission period.
  • the radio resources 870 may correspond to the radio resources 570, 770.
  • the UE 800 uses pattern recognition 848 to recognize periodic traffic and/or aperiodic traffic.
  • the sensing window 852 may correspond to the sensing window 552.
  • the sensing window 852 may be a long-term sensing window, e.g. the long-term sensing window 656.
  • the UE 800 may evaluate the radio resources 870 of the sensing window 852 regarding one or more predefined parameters or criterions.
  • the UE 800 may apply a model, for example a neural network, a model relying on artificial intelligence and/or machine learning, to recognize periodic traffic and/or aperiodic traffic in the sensing window 852.
  • the UE 800 may attribute a portion of the radio resources 870 to periodic traffic and/or may attribute another portion of the radio resources 870 to aperiodic traffic.
  • the UE 800 may recognize a periodic traffic pattern within the sensing window 852 based on the pattern recognition 848.
  • the UE may attribute radio resources identified by the periodic traffic pattern to periodic traffic.
  • the UE 800 may use the periodic traffic pattern to predict radio resources which may be occupied by periodic traffic after an end of the sensing window. Based on the prediction of radio resources, which may be occupied by periodic traffic, the UE 800 may select reserved resources for a transmission, e.g. the reserved resources 420, 520, 720 as described with respect to Figs. 4, 5, 7.
  • the LIE 800 may predict the radio resources which may be occupied by periodic traffic without decoding an SCI signal in resources of the resources 870 which are associated with periodic traffic. That is, the pattern recognition 848 may identify a portion of the radio resources 870 to be associated with periodic traffic without decoding a content of the radio resources 870.
  • the UE 800 may omit a decoding of sidelink control information signaled in radio resources which are attributed to periodic traffic for identifying or selecting radio resources for a transmission period.
  • the UE 800 may attribute radio resources of the sensing window 852 which are occupied, but which are not attributed to periodic traffic by the pattern recognition to aperiodic traffic.
  • the pattern recognition 848 may attribute a portion of the radio resources 870 to aperiodic traffic.
  • the UE 800 may distinguish between periodic traffic and aperiodic traffic using the pattern recognition 848.
  • Radio resources of aperiodic traffic may comprise information, for example the first stage SCI 110, 410, indicating reserved resources for an upcoming transmission period.
  • the UE 800 may evaluate SCI associated with data blocks of the aperiodic traffic or comprised in resources attributed to aperiodic traffic to identify radio resources reserved by the further UE 801 for a transmission of aperiodic traffic. For example, the UE 800 may identify upcoming radio resources which will be occupied by periodic traffic based on the pattern recognition 848 and may identify upcoming radio resources which are reserved for aperiodic traffic based on SCI, for example first stage SCI, of radio resources attributed to aperiodic traffic. Thus, the UE 800 may selectively decode SCI of radio resources if the respective radio resources are attributed to aperiodic traffic.
  • the predetermined parameter or the criterion of the radio resources 870 based on which the pattern recognition 848 identifies periodic traffic and/or aperiodic traffic may, for example, be a received energy information and/or a received power information of the radio resource 870.
  • the UE 800 may obtain, e.g. detect, for each of the radio resources 870, for example for each of resource blocks (or time-frequency regions) of the reserved resources 870, a receive energy information and/or a receive power information.
  • the UE 800 may identify occupied resources of the radio resources 870 based on the receive energy information or the receive power information.
  • the pattern recognition 848 may identify periodic traffic and/or aperiodic traffic by evaluating a pattern of occupied and unoccupied radio resources of the radio resources 870.
  • the UE 800 may obtain, for each of portions of the radio resources 870, e.g. resource blocks or time-frequency regions, a received signal strength indicator value, e.g. an RSSI value, and/or a reference signal receive power value, e.g. an RSRP value or an S- RSRP value, and may use said values for the pattern recognition.
  • a received signal strength indicator value e.g. an RSSI value
  • a reference signal receive power value e.g. an RSRP value or an S- RSRP value
  • an RSSI value may indicate a signal strength over a predetermined bandwidth, e.g. a frequency subband which comprises a plurality of subcarriers.
  • the RSRP value may, for example, indicate a signal strength for a single subcarrier, e.g. a signal strength for a single symbol.
  • the pattern recognition 848 may be adjusted or controlled on the basis of a control information, which the UE 800 may receive.
  • the UE 800 may receive the control information for adapting the pattern recognition 848 from a higher layer signaling, for example using an RRC signal or a system information block.
  • the UE 800 may adapt a pattern recognition duration based on the control signal period.
  • the pattern recognition may define a time span, which may, for example, be shorter than the sensing window 852 or may equal the sensing window 852.
  • the pattern recognition 848 may use resources within the pattern recognition duration time span of the sensing window 852 for recognizing periodic traffic and/or aperiodic traffic.
  • the UE 800 may adjust a pattern recognition accuracy on the basis of the control information or an additional control information. In some examples, the pattern recognition accuracy and the pattern recognition duration may depend on each other.
  • Fig. 9 shows a time-frequency diagram illustrating radio resources 970 according to an embodiment.
  • the radio resources 970 may correspond to the radio resources 870.
  • a sensing window 952 is indicated, which may correspond to the sensing window 852, and which may, for example, be a long-term sensing window or a short-term sensing window, for example as explained with respect to Figs. 5 or 6.
  • a pattern recognition duration 951 indicates a time span, which may be used by the pattern recognition 848 for recognizing periodic and/or aperiodic traffic.
  • the pattern recognition 848 may attribute resources 970a to periodic traffic and may attribute resources 970b to aperiodic traffic.
  • Fig. 10 illustrates a pattern recognition module 1048 according to an embodiment.
  • the pattern recognition 1048 may correspond to the pattern recognition 848.
  • the pattern recognition 1048 receives, as an input, resources within a sensing window, for example a long-term or a short-term sensing window.
  • the pattern recognition 1048 may attribute resources to periodic traffic or to aperiodic traffic.
  • the UE 800 may be implemented as described in section 2.3.3.
  • the UE 800 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the pattern recognition described herein may be combined with any features described with respect to the embodiments UE, such as the adjustment of sizes of selection and/or sensing windows, two-stage SCI, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in section 1.5 may be combined with any features of the UE 100, 400, 500, 700 and further embodiments of the UEs described in the following.
  • Fig. 11 shows a UE 1100 according to an embodiment.
  • the UE 1100 may optionally be part of a communication system 10, which may include a plurality of user devices, e.g. the UE 1100 and a further UE 1101.
  • the UE 1100 may communicate with a further UE 1101 via an SL 802, which may correspond to the SL 1102.
  • the UE 1100 may correspond to any of the UE 100, 400, 500, 700, 800.
  • the UE 1100 is configured to transmit information 1118a associated with an aperiodic traffic type using a first code-division-multiplex code 1119a, and to transmit information 1118b associated with a periodic traffic using a second code-division-multiplex code 1119b.
  • the information 1118a, 1118b may be SCI, for example SCI describing resources for data transmission, for example describing a data block or transport block.
  • the information 1118a, 1118b may comprise data, e.g. data to be transmitted.
  • the first code-division-multiplex code 1119a is different from the second code-division-multiplex code 1119b.
  • the UE 1100 may obtain control information, for example higher level signaling, such as an RRC message or an SIB, indicating one or more code-division-multiplex codes, including the first code-division-multiplex code 1119a for transmitting information associated with an aperiodic traffic type, and one or more code-division-multiplex codes including the second code-division-multiplex code 1119b to be used for transmitting information associated with a periodic traffic type.
  • control information for example higher level signaling, such as an RRC message or an SIB, indicating one or more code-division-multiplex codes, including the first code-division-multiplex code 1119a for transmitting information associated with an aperiodic traffic type, and one or more code-division-multiplex codes including the second code-division-multiplex code 1119b to be used for transmitting information associated with a periodic traffic type.
  • the first code-division-multiplex code 1119a and the second code-division-multiplex code 1119b may each be part of a respective group of codedivision-multiplex codes, the respective groups of code-division-multiplex codes being dedicated for transmitting aperiodic traffic or periodic traffic, respectively.
  • the UE 1100 may select the first code-division-multiplex code 1119a and/or the second code-division- multiplex code 1119b from the respective groups of code-division-multiplex codes.
  • Fig. 12 illustrates a user device 1200 according to an embodiment.
  • the UE 1200 may optionally be part of a communication system 10, which may include a plurality of user devices, e.g. the UE 1200 and a further UE 1201.
  • the UE 1200 may communicate with a further UE 1201 via an SL 1202, which may correspond to the SL 102.
  • the UE 1200 may correspond to any of the UE 100, 400, 500, 700, 800, 1100.
  • the UE 1200 is configured to distinguish between information 1218a associated with an aperiodic traffic type and information 1218b associated with a periodic traffic type in dependence on a code-division-multiplex code 1219a, 1219b, which is associated with the respective information.
  • the UE 1200 may attribute information, which is associated with a first COM code 1219a, to an aperiodic traffic type and may attribute information maps associated with a second CDM code 1219b with periodic traffic.
  • the UE 1200 may be configured for code-division-multiplexing.
  • the UE 1200 may determine whether information, for example information received via the sidelink 1202, is encoded using the first CDM code 1219a or the second CDM code 1219b, and may attribute the information to aperiodic traffic or periodic traffic correspondingly.
  • the first CDM code 1219a may correspond to the first CDM code 1119a and the second CDM code 1219b may correspond to the second CDM code 1119b as described with respect to Fig. 11. Equivalently to the UE 1100, the UE 1200 may obtain one or more CDM codes comprising the first CDM code 1219a and the second CDM code 1219b via a control information. Also, as described with respect to Fig. 11 , the first CDM code 1219a and the second CDM code 1219b may be part of respective groups of CDM codes, the groups of CDM codes being associated with a periodic traffic or periodic traffic, respectively. The UE 1200 may omit a further decoding of the information 1219b.
  • the UE 1200 may omit a further decoding of information after having identified the respective information as being associated with periodic traffic. For example, the UE 1200 may omit decoding of information attributed to periodic traffic for the purpose of selecting or reserving resources for a transmission period. For example, the UE 1200 may rather predict resources reserved for periodic traffic based on pattern recognition, as described in section 5.
  • the UE 1200 may decode the information 1218a, which is associated with aperiodic traffic, for example, for determining resources which are indicated as reserved resources by the information 1218a.
  • the UE 1200 may selectively apply pattern recognition, for example the pattern recognition 848 of Fig. 8, to the information 1218b, which is attributed to periodic traffic.
  • pattern recognition for example the pattern recognition 848 of Fig. 8, to the information 1218b, which is attributed to periodic traffic.
  • the UE 1200 may selectively decode SCI of the information 1218a, that is the UE 1200 may decode SCI comprised in the information 1218a, but may not decode SCI comprised in the information 1218b.
  • the UE 1200 may identify reserved resources beyond the upcoming resources based on pattern recognition if the respective resources are reserved for periodic traffic type, and based on SCI if the respective resources are reserved for aperiodic traffic type.
  • the UE 1100, 1200 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the COM coding described herein may be combined with any features described with respect to other embodiments of the UE, such as the adjustment of sizes of selection and/or sensing windows, two-stage SCI, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in section 1.6 may be combined with any features of the UE 100, 400, 500, 700, 800 and further embodiments of the UEs described in the following.
  • the UE 1100, 1200 may be implemented as described in section 2.3.4.
  • the UE 1100 may use a first value of a transmission parameter for the transmission of information associated with aperiodic traffic and may use a second value of the transmission parameter for transmission of information associated with periodic traffic. Accordingly, the UE 1200 may distinguish between information associated with an aperiodic traffic type and information associated with the periodic traffic type by evaluating the value of the transmission parameter.
  • the transmission parameter may be a power level of the signal signaling the transmitted information.
  • the UE 1100 is configured to transmit information 1118a associated with the aperiodic traffic type using a first power level, and is configured to transmit information 1118b associated with a periodic traffic type using a second power level.
  • the first power level is different from the second power level.
  • the UE 1100 may obtain control information indicating power levels to be used for specific traffic types.
  • the control information may indicate the first power level 1119a to be used for aperiodic traffic and the second power level 1119b to be used for periodic traffic.
  • the UE 1100 may transmit one or more reference symbols associated with information of different traffic types, for example aperiodic traffic type and periodic traffic type.
  • the reference symbol indicates a reference power level, so that the first power level and/or the second power level may be determined relative to a power level of the reference symbol.
  • the first power level and the second power level differ by at least 1 dB, or by at least 2 dB, or by at least 3 dB.
  • the UE 1200 is to distinguish between information 1218a associated with an aperiodic traffic type and information 1218b associated with a periodic traffic type in dependence on a power level which is associated with the respective information.
  • the UE 1200 may evaluate the power level of the signal signaling an information and may attribute the information to an aperiodic traffic if the power level is estimated to correspond to a first power level 1219a. If the power level is estimated to correspond to a second power level 1219b, the information may be attributed to periodic traffic type.
  • the UE 1200 may estimate a transmission power of information transmitted by the further device 1201 and received by the UE 1200 in order to attribute the power level of the received information to the first power level 1219a or the second power level 1219b. For example, the UE 1200 may consider information about the received signal, for example a distance between the further UE 1201 and the UE 1200 or a channel information, for example information about the frequency subband on which the information is received or about a hardware by which the signal was received.
  • information about the received signal for example a distance between the further UE 1201 and the UE 1200 or a channel information, for example information about the frequency subband on which the information is received or about a hardware by which the signal was received.
  • the UE 1200 may compare the transmission power of the received information, for example the estimated transmission power, estimated by considering the information about the signal, with a threshold level for attributing the power level or the estimated power level to the first power level 1219a or the second power level 1219b.
  • the threshold level is a level between the first power level 1219a and the second power level 1219b.
  • the first power level 1119a, 1219a and the second power level 1119b, 1219b may be applied to an information block comprising SCI and a transport block or a data block, or may be selectively applied either to the SCI or the transport block of an information block comprising SCI and a transport block. That is, the UE 1100 may transmit the information block accordingly and the UE 1200 may attribute a traffic type of the information block accordingly.
  • the UE 1200 may estimate the power level of a received information by using a power level of a reference symbol, which may be signaled with the received information. Thus, the UE 1200 may determine the power level of the received information relative to the power level of the reference symbol. For example, the power level of the reference symbol may serve as the threshold level for distinguishing between the first power level 1219a and the second power level 1219b.
  • the UE 1200 may select resources for a transmission of data, for example the reserved resources 120a, 120b, 420, 520, 720 as described in section 124. For the selection of transmission resources, the UE 1200 may use received information for identifying resources beyond the upcoming resources which may be occupied. For that purpose, the UE 1200 may distinguish between information 1218a and information 1218b.
  • the UE 1200 may selectively apply pattern recognition, for example the pattern recognition 848, to information 1218b attributed to periodic traffic type. Additionally or alternatively, the UE 1200 may selectively decode SCI comprised in the information 1218b to determine radio resources beyond the upcoming radio resources which are reserved for aperiodic traffic.
  • pattern recognition for example the pattern recognition 848
  • the UE 1200 may selectively decode SCI comprised in the information 1218b to determine radio resources beyond the upcoming radio resources which are reserved for aperiodic traffic.
  • Fig. 13 shows a diagram illustrating power levels associated with aperiodic traffic and periodic traffic according to an embodiment.
  • An information block 1318a which may represent information 1118a, 1118b, is signaled using a first power level 1319a, which may correspond to the first power level 1119a, 1219a.
  • An information block 1318b which may represent the information 1118b, 1218b, is signaled using a second power level 1319b, which may correspond to the power level 1119b, 1219b.
  • the indication of the traffic type using a transmission parameter such as the power level may be combined with any features described with respect to other embodiments of the UE, such as the adjustment of sizes of selection and/or sensing windows, two-stage SCI, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in section 1.6 may be combined with any features of the UE 100, 400, 500, 700, 800 and further embodiments of the UEs described in the following. The features may be combined individually or in combination.
  • the UE 1100, 1200 may be implemented as described in section 2.3.5.
  • Fig. 14 shows a UE 1400 according to an embodiment.
  • the UE 1400 may optionally be part of the wireless communication system 10, which may include a plurality of user devices, for example a UE 1400 and a further UE 1401.
  • the UE 1400 may communicate with the UE 1401 via a sidelink 1402, which may correspond to the sidelink 102.
  • the UE 1400 is configured to transmit a first stage SCI 1410 describing reserved resources for transmission of further information.
  • the UE 1400 selectively provides, at one or more multi-use bit positions 1418 of the first stage SCI 1410, one or more bits indicating whether a traffic type is periodic or aperiodic, or one or more bits indicating another transmission parameter.
  • the first stage SCI 1410 may be a first SCI of a two-stage SCI, as explained in section 1.
  • the reserved resources described in the first stage SCI 1410 may correspond to the reserved resources 120a, 120b, 420, 520, 720.
  • the one or more bits indicating whether a traffic type is periodic or aperiodic may be referred to as traffic type information.
  • the UE 1400 may select whether to provide the traffic type information or one or more bits indicating another transmission parameter at the one or more multi-use bit positions in dependence on a high level signaling. Alternatively, the UE 1400 may decide whether to provide the traffic type information or another transmission parameter at the one or more multi-use bit positions 1418.
  • the UE 1400 may provide a signaling which indicates whether the multi-use bit position 1418 indicates a traffic type information or another transmission parameter.
  • the UE 1400 may provide the signaling of the indication about the usage of the multi-use bit position 1418 if the UE 1400 decides on which information is provided at the multi-use bit position 1418.
  • the other transmission parameter may be the backward indication, as explained in section 1.1.
  • Fig. 15 illustrates a UE 1500 according to an embodiment.
  • the UE 1500 may optionally be part of a communication system 10, which may include a plurality of user devices, e.g. the UE 1500 and a further UE 1501 .
  • the UE 1500 may communicate with a further UE 1501 via a sidelink 1502, which may correspond to the SL 102 of Fig. 1.
  • the UE 1500 is configured to receive a first stage SCI 1510, which may correspond to the first stage SCI 1410 transmitted by the UE 1400.
  • the first stage SCI 1510 describes reserved resources for transmission of further information.
  • the UE 1500 may selectively evaluate one or more multi-use bit positions 1518 of the first stage SCI 1510 to obtain a traffic type information 1549 indicating whether a traffic type is periodic or aperiodic, or to obtain another transmission parameter.
  • the UE 1500 comprises an evaluation module 1547.
  • the evaluation module 1547 The evaluation module
  • the 1547 may evaluate the multi-use bit position 1518 in dependence on the information signaled by the multi-use bit position 1518. If the multi-use bit position 1518 comprises the traffic type information 1549, the evaluation module 1547 may evaluate whether the traffic type is periodic or aperiodic. If the multi-use bit position 1518 indicates another transmission parameter 1551 , the evaluation module 1547 may evaluate the other transmission parameter 1551.
  • the UE 1500 may receive a high level signaling indicating whether the multi-use bit position
  • the UE 1500 may decide how to evaluate the multi-use bit position 1518. For example, the UE 1500 may evaluate one or more bits of a radio resource control message to infer the type of information of the multi-use bit position 1518.
  • the UE 1500 may select whether to obtain the traffic type information 1549 or the transmission parameter 1551 from the multi-use bit position 1518. For example, the UE 1500 may decide how to evaluate the multi-use bit position 1518 based on an information comprised in the first stage SCI 1510 or based on another information received from the further UE 1501.
  • the transmission parameter 1551 may comprise a backward indication as described in section 1.1.
  • the UE 1300, 1400 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • the multi-use bit may be implemented independently from other features of the UE, such as the selection and/or sensing window, the type of prediction of reserved resources (e.g. pattern recognition and first stage SCI), so that feature described in sections 1.8 may be combined with any features of embodiments of the UE 100, 400, 500, 700, 800, 1100, 1200 and further embodiments described in the following.
  • Fig. 16 illustrates a UE 1600 according to an embodiment.
  • the UE 1600 may optionally be part of the communication network 10, which may include a plurality of user devices, e.g. the UE 1600 and a further UE 1601 .
  • the UE 1600 may communicate with a further UE 1601 via a sidelink 1602, which may correspond to the sidelink 102 according to Fig. 1.
  • the UE 1600 and the UE 1601 may each correspond to any of the UE 100, the UE 400, the UE 500, the UE 700, the UE 800, the UE 1100, the UE 1200, the UE 1400, and the UE 1500.
  • the UE 1600 may combine details, features and functionalities and advantages of the embodiments of the UE as described in sections 1.1 to 1.8. Features may be combined with the UE 1600, both individually or in combination.
  • the UE 1600 may receive, via the sidelink 1602, an information block 1608, signaled in one or more resources of the SL 1602.
  • the information block 1608 may comprise one or both of an SCI and a transport block.
  • the information block 1608 may correspond to any of the first stage SCI 110, 110a, 110b, 410, 1410, 1510, the second stage SCI 130a, 130b, or a data block or a transport block, such as the transport block 140a, 142-2, 142-1.
  • the information block 1608 may correspond to resources comprising a second stage SCI and/or a transport block, such as the resources 120a, 122-1.
  • the information block 1608 may comprises a transport block and an SCI related to the transport block, wherein the SCI is not necessarily a second stage SCI, but may, for example, be a single stage SCI.
  • the UE 1600 uses the information block 1608 and optionally further information blocks which may comprise any of the information as described with respect to the information block 1608, for predicting which of upcoming resources of the sidelink 1602 may be occupied by transmissions of the further UE 1601 or other further UEs.
  • the UE 1600 provides the occupied resources 1646 determined by the prediction 1645 of occupied resources for a selection 1650 of resources for transmission.
  • the selection 1650 may correspond to the selection 450 of Fig. 4.
  • the selection 1650 selects resources for a transmission of information of the UE 1600.
  • the selection 1650 of resources to be reserved for the transmission of the information referred to as reserved resources 1620, may be performed so that an overlap with the occupied resources 1646 may preferably be avoided.
  • a transmission module 1690 of the UE 1600 may transmit information using the reserved resources 1620 for transmitting one or more information blocks 1692.
  • the reserved resources 1620 may, for example, correspond to the resources 120a, 120b, 420, 520, 720. In some examples, the reserved resources 1620 may be used for transmission of first stage SCI.
  • the prediction 1645 of occupied resources may consider received information blocks, like the information block 1608, which are received during one or more sensing windows, for example as explained with respect to the UE 500, 700, 800 with respect to Figs. 5 to 8.
  • the adjustment of one or more of the sensing windows as explained with respect to Fig. 5, may be implemented in the prediction 1645 independent of other features described with respect to the UE 1600.
  • the selection 1650 of the reserved resources may select the reserved resources from a selection window, for example as described with respect to Fig. 7.
  • the adjustment of the selection window as described with respect to Fig. 7 may be implemented in the UE 1600 independent of other features of the UE 1600.
  • the prediction 1645 of the occupied resources 1646 is based on evaluation of SCI comprised in the received information block 1608.
  • the prediction 1645 may infer information about the occupied resources 1646 from first stage SCI or second stage SCI or single stage SCI comprised in the received information block 1608.
  • the prediction 1645 may derive the occupied resources 1646 from SCI independent of the traffic type of the received information 1608.
  • the prediction 1645 may derive the occupied resources 1646 related to one or more specific traffic types, for example aperiodic traffic, from SCI comprised in the received information block 1608.
  • the prediction 1645 may retrieve information about occupied resources related to further traffic types by different means.
  • a prediction of occupied resources is, for example, described with respect to Figs. 1 to 4.
  • the prediction 1645 of the occupied resources 1646 relies on a pattern recognition, for example the pattern recognition 848 explained with respect to Fig. 8.
  • pattern recognition may predict occupied resources related to periodic traffic.
  • pattern recognition is used to differentiate between aperiodic traffic and periodic traffic.
  • occupied resources 1646 related to periodic traffic may be predicted based on pattern recognition, and occupied resources 1646 related to aperiodic traffic may be identified by other means, for example by evaluating information related to the aperiodic traffic which may have been identified by the pattern recognition.
  • the received information block 1608 may have been identified as being related to aperiodic traffic due to pattern recognition.
  • a first stage SCI which may be comprised in the received information block 1608 may be evaluated for identifying occupied resources 1646 described by the received information block 1608.
  • periodic and aperiodic traffic may be distinguished based on a transmission parameter, for example a CDM value or a power level of the received information block 1608.
  • a transmission parameter for example a CDM value or a power level of the received information block 1608.
  • the UE 1600 may distinguish aperiodic and periodic traffic before the prediction 1645 of occupied resources.
  • the UE 1600 may then use the pattern recognition for the prediction of occupied resources related to periodic traffic and may evaluate SCI of the received information block 1608 for the prediction 1645 of the occupied resources 1646 if the information block 1608 is related to aperiodic traffic. Examples of how distinguishing aperiodic traffic and periodic traffic may be implemented are given with respect to Figs. 11 to 15.
  • the UE 1600 can optionally be supplemented by any of the features, functionalities and details described herein with respect to the other embodiments, both individually and taken in combination.
  • LTE V2X sidelink mode 4
  • UE autonomous resource selection and reservation are used based on the channel sensing operations.
  • LTE V2X supports only periodic traffic in broadcast manner. For example, it has been found that in a channel sensing period, two methods are available: either a sensing UE measures received signal strength and excludes the resources that are above the configured threshold or decodes a SCI of sensed UE to acquire the information associated to the sensed UE, e.g. priority, resource configuration which can be used in resource exclusion and candidate resource selection procedure.
  • the sensing UE cannot detect aperiodic packet with current sensing procedure and LTE control and data channel structure.
  • S-RSSI measurement is averaged over allocated resources to the UE with periodic users and may be disturbed by the aperiodic traffic.
  • new changes are required to enhance the current sensing procedure and to reduce the processing time due to blind decoding. It has been found that this will increase the accuracy of the radio resource exclusion procedure.
  • new techniques are devised to facilitate traffic type recognition procedure during sensing procedure especially in case of aperiodic traffic, however, it is not precluded to be used by periodic traffic.
  • Embodiment 1 (aspect 1 , e.g. first inventive concept, e.g. embodiments described in section 1.1 , 1.2), two-stage side link control information (SCI) is applied to indicate associated resource blocks needed to convey aperiodic traffic payload. Besides, optionally, blind transmission and pre-emption are considered as enablers to address the control channel impairment in two-stage SCI.
  • SCI side link control information
  • Embodiment 3 e.g. fourth inventive concept, e.g embodiments described in section 1.5
  • periodic and aperiodic traffic are distinguished based on a pattern recognition algorithm to ascertain periodic/aperiodic traffic type whereby the processing time due to control channel coding is decreased.
  • Embodiments 4 and 5 propose a traffic type recognition method where the traffic type is indicated by different codes or power levels.
  • the maximum number of SL resources NMAX reserved by one transmission including current transmission is [2 or 3 or 4] o Aim to select the particular number in RAN 1 #98
  • NMAX is the same regardless of whether HARQ feedback is enabled or disabled Agreements:
  • (Pre-)configuration can limit the maximum number of HARQ (retransmissions of a TB o Up to 32 o FFS the set of values o FFS signaling details (UE-specific, resource pool specific, QoS specific, etc.) o If no (pre)configuration, the maximum number is not specified o Note: this (pre-)configuration information is NOT intended for the Rx UE Agreements:
  • SCI payload indicates sub-channel(s) and slot(s) used by a UE and/or reserved by a UE for PSSCH (re-)transmission(s)
  • SL minimum resource allocation unit is a slot FFS whether when the resource allocation is multiple slots, the slots can be aggregated
  • the resource (re-)selection procedure includes the following steps o Step 1 : Identification of candidate resources within the resource selection window
  • Step 2 Resource selection for (re-)transmission(s) from the identified candidate resources
  • Step 1 of the resource (re-)selection procedure a resource is not considered as a candidate resource if: o
  • the resource is indicated in a received SCI and the associated L1 SL- RSRP measurement is above an SL-RSRP threshold
  • the SL-RSRP threshold is at least a function of the priority of the SL transmission indicated in the received SCI and the priority of the transmission for which resources are being selected by the UE o FFS details
  • a UE does sensing and resource(s) selection where either resource(s) are allocated by (pre-configuring) a set of time-frequency resource patterns (TFRP) or non-TFRP from/within (pre-) configured radio resource pool.
  • Figure 18 depicts (pre-) configured radio resource allocation including retransmission for vehicular users with periodic traffic.
  • the diagram of Fig. 18 represents time and frequency (pre-) configuration for periodic traffic (Example, Details are optional). Note that in case of aperiodic traffic, the packets are not generated in a periodic manner. Besides, some of those packets may have stringent reliability and latency requirements.
  • sensing and radio selection procedure is needed to distinguish and schedule the resources for those traffic types so as to fulfill the latency and reliability requirements.
  • a UE starts sensing at time instance n-T 0 , where n time instance is determined by a resources (re)selection trigger as depicted in Figure 17.
  • the UE continues to do sensing during the sensing window time period where both parameters (n & To) are, for example, configured by higher signaling while UE is in coverage.
  • the UE excludes occupied radio resources measured during the sensing time interval provided that the reference signal received power (RSRP)/ received signal strength indicator (RSSI) is above a (pre-) configured threshold.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • the resource selection process at time instance n+Ti is triggered where Ti is a time delay determined by the UE processing time.
  • the radio resources are, for example, selected for data /control transmission from the excluded radio resources during the sensing procedure, i.e. selection window (SW), wherein, for example,
  • the radio resources may, for example, be chosen from candidates resources which are not excluded resources.
  • the duration of the selection window may, for example, depend on packet budget delay (PDB) configured by the application layer and/or depend on a Difference between PDB and time instance n+Ti.
  • PDB packet budget delay
  • radio resources are, for example, scheduled from resources in selection window, say, scheduling window wherein the duration is either predefined by specification, Or configurable.
  • Figure 17 represents radio resource selection process at different time instances.
  • the scheme of Fig. 17 may illustrate a resource selection without HARQ according to an embodiment.
  • SL-RSRP is considered as metric to exclude the channels based on the received signal threshold configured by higher layer signaling.
  • a UE When a UE is not able to decode SCI, then a UE needs another criterion to proceed with exclusion and inclusion for window selection preparation. In such situation, for example, SL-RSSI is measured on the channels to identify occupied channels. Note that, SL-RSSI is, for example, measured on all configured channels, and thus the channel utilization and/or performance is/are degraded due to wrong exclusion of resources in case of aperiodic traffic.
  • One (optional) solution to address this problem is to exclude the resources associated to aperiodic traffic before doing SL-RSSI measurement.
  • DMRS blind decoding In DMRS blind decoding, a UE is able to exclude the unused resources without relying on SCI. This way, the requirements for URLLC application are fulfilled. Besides less overhead is imposed on the network.
  • platooning wherein all vehicles exchange some information which needs to be transmitted reliably and at minimum latency.
  • DMRS blind decoding aids to improve reliability. However, this reliability is achieved at cost of overhead due to scaling up the number of DMRS in PSSCH.
  • Another reason that makes the DMRS blind decoding a good candidate for radio resource exclusion during energy sensing time interval is simplicity of DMRS blind decoding compared with SCI decoding technique. Since the DMRS blind decoding is common part for both techniques and performed prior to SCI decoding, provided that having a simple correlator to find an appropriate pattern, the DMRS blind coding can be simply implemented, and thus hardware complexity is significantly decreased.
  • DMRS blind decoding seems to be an appropriate candidate for periodic traffic, it may fail to distinguish the traffic types, i.e. periodic and aperiodic, which results in wrong exclusion of radio resources. It has been found that in such cases, SCI decoding may need to be decoded in order to distinguish traffic type and associated radio resources prior to control/data transmission.
  • Embodiment 1 (Aspect 1): two-stage SCI indicating periodic/aperiodic traffic type
  • a user with aperiodic traffic transmits control channel information to indicate the reserved resources ahead of data transmission, where the time gap between the 1 st SCI control channel and the 2nd SCI + data transmission is, for example, mainly influenced by PDB configured, for example, by higher layer signaling and number of available resource in the selection window.
  • PDB configured, for example, by higher layer signaling and number of available resource in the selection window.
  • aperiodic traffic can be implicitly interpreted in the resource reservation period (or in the resource reservation period parameter) or in periodicity parameter indicated in 1 st SCI (or 1 st stage SCI) of two-stage SCI with dependent upon a higher level signaling (or higher layer signaling) (e.g., an application layer signaling) when it (e.g., the periodicity parameter) is disabled or set to zero value.
  • the periodicity parameter may indicate how many times a resource allocation is repeated.
  • a disabled value or zero value of the periodicity parameter may indicate aperiodic traffic (which, for example, occurs only once, wherein reserved resources are indicated by the resource reservation period parameter).
  • aperiodic traffic may be signaled implicitly using a resource reservation period parameter or using a periodicity parameter.
  • a “disabled” value e.g., a zero value
  • the periodicity parameter may indicate an aperiodic traffic type.
  • TB transport block
  • the first stage sidelink control information may be directly ahead of an associated transport block (TB) (e.g., a data block) (such that the associated transport block is immediately after the first stage sidelink control information).
  • TB transport block
  • the first stage sidelink control information may not indicate the transport block next to (the) sidelink control information, but another transport block in the upcoming time instance.
  • aperiodic traffic channel can be explicitly indicated in 1 st SCI (or 1 st stage SCI) of two-stage SCI by the additional bit as aperiodic flag indicated in 1 st SCI (or first stage SCI) of two-stage SCI, for example, on the higher layer with dependent upon a higher level signaling.
  • aperiodic traffic can be explicitly signaled using a dedicated (additional) bit which can be considered as an “aperiodic flag” or “aperiodic traffic type” flag.
  • aperiodic traffic channel (or generally, aperiodic traffic) can be explicitly indicated in 1 st SCI (or 1 st stage SCI) of two-stage SCI by the additional bit as aperiodic flag indicated in 1 st SCI (or first stage SCI) of two-stage SCI configured by higher layer signaling (wherein, for example, a transmitting user device receives a higher level signaling, indicating whether a traffic type is periodic or aperiodic, and sets the additional (e.g. dedicated) bit (e.g. an aperiodic flag or aperiodic traffic flag) accordingly in response to the higher layer signaling.
  • the reserved resource(s) e.g.
  • aperiodic traffic for example, transmission time and frequency of aperiodic traffic
  • aperiodic traffic for example, transmission time and frequency of aperiodic traffic
  • one or more resource reservation parameters which may, for example, be included in a resource reservation period of the first stage SCI, may describe aperiodic traffic (e.g. indicate a transmission time and/or a frequency used for a transmission of aperiodic traffic).
  • 1 st SCI can be associated with a same or different transport block (TB) (for example, with a transport block immediately following the 1 st stage SCI or with a later transport block, not immediately following the first stage SCI) for initial transmission or retransmission and can be comprised at least the following information:
  • TB transport block
  • 1 st stage SCI conveys o traffic type, i.e. periodic or aperiodic o priority (optional) o Reservation resource period o Associated resources for the second SCI of two stage SCI in time and frequency domains (optional)
  • one bit (or one bit position) that is defined for the traffic type (or reserved for the traffic type, or associated with the traffic type) in the 1st stage SCI can be interpreted (or defined, or allocated) to be used for other purposes (e.g. for another type of transmission parameter having a different meaning), for example, when it is configured by the higher layer signaling, e.g. through the RRC message or the SCI (sidelink control information).
  • the field “traffic type” can be used (e.g. in a selective manner; e.g. in response to a configuration information in the RRC message or in the sidelink control information) to indicate backward indication (or to carry a bit signaling whether backward indication is used or not), wherein, if set (e.g. if a bit value indicates that backward indication should be used), the “Reservation resource period” field in 1st stage SCI shows the radio resources as follows:
  • N represents the number of maximum transmissions (wherein, for example, N is the value of the “reservation resource period” field) ⁇ n’1, n’2, n’3 are real logical slots indicated by the “Reservation resource period” field in the 1st stage SCI and
  • n_-1 , nO, n1 are logical slots concerning the slots that in the 1st stage SCI are received (e.g. slots in the time-frequency grid, wherein slot n_-1 may, for example, be temporally before the 1 st stage SCI and wherein slots nO and n1 may be temporally after the 1 st stage SCI)
  • the RRC configuration (e.g. the radio resource control configuration) can include the following element for the PSCCH (e.g. for the physical sidelink control channel),
  • PSCCH Traffictype Indicates the [0/1] 1 bit Per-resource UE as well indicator-SL traffic type pool as Cell and backward indication alternatively
  • Figure 2 may represents a principle of operation of two stage SCI (e.g. for aperiodic and periodic traffic) whereinlst SCI signals different traffic types, i.e. aperiodic or periodic, and associated resources, for example, in frequency and time domain.
  • 1 st stage SCI is, for example, used to convey corresponding information related to reserved resources ahead of transmission.
  • sensing UE may not able to decode the 1 st stage SCI and thus some collision may occur among UEs during data transmission.
  • One way to reduce impairment due to undecoded SCI is to have one, or (optionally) more than one blind retransmission of the 1 st stage SCI wherein
  • the number of blind re-transmission is, for example, configured by higher layer signaling when UE is in coverage area or via system information block(SIB) in idle mode
  • the number of blind re-transmissions is, for example, preconfigured.
  • Figure 3 may illustrate how a blind retransmission of 1 st stage SCI aids to reduce the channel impairment and avoids possible data collision in aperiodic traffic channel.
  • sidelink sensing measurements are used to exclude occupied radio resources.
  • long-term sensing is performed in order to identify the idle channels.
  • this technique is efficient in periodic traffic as incoming traffic is predictable, it cannot be applied for aperiodic traffic that comes instantly and urgently.
  • Short-term and hybrid (short- and long-term) sensing are new techniques aiming to identify aperiodic traffic during sensing procedure.
  • zone concept is introduced to differentiate services based on geographical area.
  • the zone concept in LTE does not consider requirements posed by new emerging services in NR sidelink V2X.
  • NR sidelink V2X is expected to have different zones considering, for example,
  • NR sidelink V2X it is, for example, expected to have different zones based on traffic type, say, for example, periodic and aperiodic.
  • adaptive long-/short-term sensing e.g. adaptive long term sensing or adaptive short-term sensing, or adaptive combined long term/short term sensing
  • zone area is proposed wherein different sensing durations in different zones are, for example, configured by
  • Figure 6 may represent short-/long-term sensing window configuration taking into consideration zone concept.
  • Figure 6 illustrates an example of adaptive long/short sensing windows based on zone concept according to an embodiment.
  • zone-3 and zone-2 have the same traffic requirements wherein short sensing windows are identical for both while the long-term sensing is shorter (or, alternatively, longer) in case of the zone-3 compared with the one in the zone-2.
  • zone-1 and the zone-2 it can be clearly seen that long-term sensing for both zones are identical while having different short-term sensing window sizes in case of the zone-1. It is mainly because of there are applications with different latency and reliability requirements.
  • the 5G QoS model is based on the QoS flows.
  • QoS parameters defined for the 5G QoS model which are namely the 5QI (for example, PQI/VQI for V2X), ARP, RQA, Notification Control, flow bit rates, Aggregate Bit Rates, Default values and Maximum Packet Loss Rate.
  • the QoS parameter that mainly affects the physical layer procedures is the 5QI.
  • the characteristics of 5QI (for example, PQI/VQI for V2X) are, for example, the resource type, priority level, packet delay budget (PDB), packet error rate (PER), averaging window and maximum data burst volume.
  • the 5QI characteristics can, for example, be utilized for an efficient resource selection and exclusion procedure.
  • the resource type is a guaranteed bit rate (GBR) or delay critical GBR
  • the fixed sensing period of 1000ms will be too long to satisfy the latency requirements.
  • the UE should, for example, adapt its sensing window to a shorter time period as a function of the 5QI.
  • This configuration of the time period could, for example, be either pre-configured for the UE or provided by the gNB when the UE is in coverage. This means there could, for example, specific tables mapping the 5QI characteristic to the sensing window duration.
  • the selection window where the UE selects the resources for transmission. For example, the value of time at which the selection starts is usually derived based on the UE processing time. How long this selection window for transmission could, for example, be a function of 5QI characteristic e.g. PDB and Communication range to name few.
  • the following two information elements can inform the UE about the sensing procedure. This is applicable to both above mentioned methods.
  • IE MeasSensing-Config can be modified for NR.
  • the IE MeasSensing-Config specifies, for example, the input factors for sensing measurement
  • MeasSensing-Config-r* :: SEQUENCE ⁇ sensingSubchannelNumber-r* INTEGER (1..20), sensingPeriodicity-r* ENUMERATED ⁇ ms20,ms50,mslOO,ms200, ms300,ms400,ms500,ms600, ms700,ms800,ms900,mslOOO ⁇ , sensingPeriodicityzonebased-r ENUMERATED ⁇ ms20,ms50,mslOO,ms200, ms300,ms400,ms500,ms600, ms700,ms800,ms900,mslOOO ⁇ , sensingPeriodicityQoSbased-r ENUMERATED ⁇ ms20,ms50,mslOO,ms200 ms300,ms400,ms500,ms600, ms700,ms800,ms900,mslOOO ⁇ sensingRe
  • SL-CommTxPoolSensingConfig specifies, for example, V2X sidelink communication configurations used for UE autonomous resource selection.
  • SL-CommTxPoolSensingConfig-r* SEQUENCE ⁇ pssch-TxConfigList-r* SL-PSSCH-TxConfigList-r*, thresPSSCH-RSRP-List-r* SL-ThresPSSCH-RSRP-List-r*, restrictResourceReservationPeriod-r* SL-RestrictResourceReservationPeriodList-r* sensingperiodzone-r* SL—ZoneSensingPeriodConfig—r*
  • OPTIONAL Need OR probResourceKeep-r* ENUMERATED ⁇ v0,v0dot2,v0dot4,v0dot6,v0dot8, spare3,spare2, sparel ⁇ p2x-SensingConfig-r* SEQUENCE ⁇ minNumCandidateSF-r* INTEGER (1..13), gapCandidateSensing-r* BIT STRING (SIZE (10))
  • OPTIONAL Need OR sl-ReselectAfter-r* ENUMERATED ⁇ nl, n2, n3, n4, n5, hb , n7, n8, n9, spare7, spare6, spare5, spare4, spare3, spare2, sparel ⁇ OPTIONAL — Need OR
  • Embodiment 3 (Aspect 3): Aperiodic pattern recognition during sensing period
  • RAN1 agreed that sidelink sensing and resource selection can, for example, be based on sidelink reference signal received power (S-RSRP). For example, if a UE measures S- RSRP above a certain threshold, the sidelink control information (SCI) is decoded and the resources can, for example, be excluded from the candidate resource and are not selected by the UE. Flowever, this way would increase the processing time due to RSRP measurement and decoding SCI signaling. In addition, the usage of sensing measurement, in case the UE is not able to decode SCI, is still not clear.
  • S-RSRP sidelink reference signal received power
  • the current sensing procedure is not efficient enough in terms of processing time to distinguish traffic types, i.e. periodic and aperiodic traffic.
  • a pattern recognition for example, prior to start usual SCI decoding.
  • a UE is, for example, able to exclude the resource that are used for periodic traffics with energy sensing, e.g. S-RSSI, in a shorter time considering the patterns for traffic type recognition.
  • pattern recognition can, for example, achieve more accurate results at the cost of running for a longer T PRG .
  • accuracy of recognized pattern, A Um , and T PRG is always, there exists a tradeoff between accuracy of recognized pattern, A Um , and T PRG ,
  • both T PRG and A Um are, for example, configured by:
  • the pattern recognition parameters may be portrayed, for example, in Figure 9.
  • Figure 10 may show, for example, the principle of operation of algorithm considering the configured parameters.
  • Figure 9 may illustrate an example of a traffic pattern recognition algorithm according to an embodiment.
  • Figure 10 may Illustrate an example of a pattern recognition diagram according to an embodiment.
  • Embodiment 4 Traffic type indication by code-division-multiplexinq (CDM), for example, in 1 st SCI of two-stage SCI or one-stage SCI
  • CDM code-division-multiplexinq
  • Code-division-multiplexing is a technique in which multiple signals are combined for simultaneous transmission.
  • CDM Code-division-multiplexing
  • it is considered as a solution to transmit, for example, different data signals on same antenna port at same time, for example, in PDSCH generation procedure wherein different CDM groups addressing different data signal at same antenna port.
  • CDM concept it is an idea according to the invention to use CDM concept to indicate the traffic type, say, for example, periodic and aperiodic traffic type. Having traffic type identified, for example, at initial stage of decoding process aids to reduce processing time in sensing procedure.
  • the sensing UE does not require to continue decoding in case of periodic traffic type as the traffic pattern has, for example, already been resolved and thus the UE can, for example, simply exclude the occupied resources accordingly.
  • CDM value is (pre-) configured, for example, by
  • Table 2 shows an illustrative example of CDM group addressing different traffic type (example)
  • Embodiment 5 Traffic type indication using different power level signal
  • RSRP RSRP
  • the main challenge in sensing procedure is to identify periodic and aperiodic traffic.
  • the transmission power of surrounding UEs can be calculated, for example, by T — R. d a , where T is transmission power and R is receiving signal during sensing.
  • Other parameters d, a are distance to UE and channel model parameters respectively.
  • all UEs transmit periodic and aperiodic traffic with different transmission power level that are configured, for example, by
  • a sensing UE does sensing and calculates, for example, transmission power of the sensed UEs. Then, a sensing UE compares, for example, the estimated transmission power of the sensed UEs with the (pre-) configured transmission power(s) to distinguish, for example, periodic and aperiodic traffic. Finally, the resources are, for example, excluded for periodic traffic for next transmission slots. This way, since resource exclusion is done by energy sensing instead of decoding process, the processing time is expected to be reduced.
  • Figure 13 may show how a sensing UE is able to distinguish traffic types, say, for example, periodic and aperiodic based, for example, on different levels of transmission power derived, for example, from the measured received signal level during sensing measurement time period. Figure 13 may, for example, illustrate an example of traffic type indication using different power levels according to an embodiment.
  • Another enabler to address the above problem is to use different RSRP signals to differentiate, for example, between periodic and aperiodic traffic.
  • a sensing UE does energy sensing and compared the measured RSRP with configured RSRP level thresholds results in distinguishing traffic type, i.e. periodic or aperiodic traffic.
  • the RSRP thresholds for different traffic types are configured, for example, by
  • Figure 13 may illustrate how traffic type information is distinguished, for example, by using different received signal level for different UEs with periodic and aperiodic traffic.
  • the effect of this idea is to reduce the size of the 1st stage SCI, using either the existing ⁇ MRS to add the cast-type information or the destination ID to derive the cast. type information ....I
  • Embodiments according to the invention may, for example, be used in 5G communication systems, e.g. in 5G V2X communication systems.
  • features and functionalities disclosed herein relating to a method can also be used in an apparatus (configured to perform such functionality).
  • any features and functionalities disclosed herein with respect to an apparatus can also be used in a corresponding method.
  • the methods disclosed herein can be supplemented by any of the features and functionalities described with respect to the apparatuses.
  • any of the features, functionalities and details described with respect to a transmitting user device can optionally also be introduced in a receiving or sensing user device, and vice versa.
  • any of the features and functionalities described herein can be implemented in hardware or in software, or using a combination of hardware and software, as will be described in the section “implementation alternatives”.
  • aspects have been described in the context of an apparatus, it is clear that these aspects also represent a description of the corresponding method, where a block or device corresponds to a method step or a feature of a method step. Analogously, aspects described in the context of a method step also represent a description of a corresponding block or item or feature of a corresponding apparatus.
  • Some or all of the method steps may be executed by (or using) a hardware apparatus, like for example, a microprocessor, a programmable computer or an electronic circuit. In some embodiments, one or more of the most important method steps may be executed by such an apparatus.
  • embodiments of the invention can be implemented in hardware or in software.
  • the implementation can be performed using a digital storage medium, for example a floppy disk, a DVD, a Blu-Ray, a CD, a ROM, a PROM, an EPROM, an EEPROM or a FLASH memory, having electronically readable control signals stored thereon, which cooperate (or are capable of cooperating) with a programmable computer system such that the respective method is performed. Therefore, the digital storage medium may be computer readable.
  • Some embodiments according to the invention comprise a data carrier having electronically readable control signals, which are capable of cooperating with a programmable computer system, such that one of the methods described herein is performed.
  • embodiments of the present invention can be implemented as a computer program product with a program code, the program code being operative for performing one of the methods when the computer program product runs on a computer.
  • the program code may for example be stored on a machine readable carrier.
  • inventions comprise the computer program for performing one of the methods described herein, stored on a machine readable carrier.
  • an embodiment of the inventive method is, therefore, a computer program having a program code for performing one of the methods described herein, when the computer program runs on a computer.
  • a further embodiment of the inventive methods is, therefore, a data carrier (or a digital storage medium, or a computer-readable medium) comprising, recorded thereon, the computer program for performing one of the methods described herein.
  • the data carrier, the digital storage medium or the recorded medium are typically tangible and/or nontransitionary.
  • a further embodiment of the inventive method is, therefore, a data stream or a sequence of signals representing the computer program for performing one of the methods described herein.
  • the data stream or the sequence of signals may for example be configured to be transferred via a data communication connection, for example via the Internet.
  • a further embodiment comprises a processing means, for example a computer, or a programmable logic device, configured to or adapted to perform one of the methods described herein.
  • a processing means for example a computer, or a programmable logic device, configured to or adapted to perform one of the methods described herein.
  • a further embodiment comprises a computer having installed thereon the computer program for performing one of the methods described herein.
  • a further embodiment according to the invention comprises an apparatus or a system configured to transfer (for example, electronically or optically) a computer program for performing one of the methods described herein to a receiver.
  • the receiver may, for example, be a computer, a mobile device, a memory device or the like.
  • the apparatus or system may, for example, comprise a file server for transferring the computer program to the receiver.
  • a programmable logic device for example a field programmable gate array
  • a field programmable gate array may cooperate with a microprocessor in order to perform one of the methods described herein.
  • the methods are preferably performed by any hardware apparatus.
  • the apparatus described herein may be implemented using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.
  • the apparatus described herein, or any components of the apparatus described herein may be implemented at least partially in hardware and/or in software.
  • the methods described herein may be performed using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.

Landscapes

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

Abstract

La présente invention concerne un dispositif utilisateur pour un système de communication sans fil comprenant une pluralité de dispositifs utilisateur qui sont destinés à communiquer avec un autre dispositif utilisateur à l'aide d'une liaison latérale. Le dispositif utilisateur doit transmettre des informations de commande de liaison latérale de premier étage décrivant des ressources réservées à la transmission d'autres informations comprenant des informations de commande de liaison latérale de second étage, les informations de commande de liaison latérale de premier étage comprenant des informations indiquant si un type de trafic est périodique ou apériodique. La présente invention concerne en outre des dispositifs utilisateur et des procédés de communication dans un système de communication sans fil.
PCT/EP2020/077584 2019-10-02 2020-10-01 Dispositifs utilisateur pour un système de communication sans fil et procédés de communication dans un système de communication sans fil WO2021064135A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
EP19201215.1 2019-10-02
EP19201215 2019-10-02
EP20157034.8 2020-02-12
EP20157034 2020-02-12
EP20174820 2020-05-14
EP20174820.9 2020-05-14

Publications (1)

Publication Number Publication Date
WO2021064135A1 true WO2021064135A1 (fr) 2021-04-08

Family

ID=72665274

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/077584 WO2021064135A1 (fr) 2019-10-02 2020-10-01 Dispositifs utilisateur pour un système de communication sans fil et procédés de communication dans un système de communication sans fil

Country Status (1)

Country Link
WO (1) WO2021064135A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220015099A1 (en) * 2020-07-09 2022-01-13 Samsung Electronics Co., Ltd. Power-efficient resource selection procedure for nr v2x ue with limited power
US20220322304A1 (en) * 2020-12-10 2022-10-06 Ofinno, Llc Sidelink Sensing Procedure
US11601910B2 (en) * 2021-07-07 2023-03-07 Qualcomm Incorporated Sidelink control information (SCI)-triggered sidelink positioning
US20230120774A1 (en) * 2021-10-19 2023-04-20 Qualcomm Incorporated Relaxed sensing for new radio sidelink over millimeter wave operating frequencies

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3706496A1 (fr) * 2019-01-23 2020-09-09 LG Electronics, Inc. Transmission sci en deux étapes de v2x nr

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3706496A1 (fr) * 2019-01-23 2020-09-09 LG Electronics, Inc. Transmission sci en deux étapes de v2x nr

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
ASUSTEK: "Discussion on sidelink structure in NR V2X", vol. RAN WG1, no. Prague, CZ; 20190826 - 20190830, 16 August 2019 (2019-08-16), XP051765912, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_98/Docs/R1-1909305.zip> [retrieved on 20190816] *
ERICSSON: "On 2-stage PSCCH design", vol. RAN WG1, no. Spokane, WA, US; 20181112 - 20181116, 11 November 2018 (2018-11-11), XP051555706, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1813648%2Ezip> [retrieved on 20181111] *
NOKIA ET AL: "Discussion of physical layer structure for sidelink", vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051727531, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1906074%2Ezip> [retrieved on 20190513] *
NOKIA ET AL: "Discussions on NR V2X Sidelink Physical Layer Structures", vol. RAN WG1, no. Athens, Greece; 20190225 - 20190301, 16 February 2019 (2019-02-16), XP051600266, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F96/Docs/R1%2D1902573%2Ezip> [retrieved on 20190216] *
NOKIA ET AL: "On Sidelink Resource Allocation", vol. RAN WG1, no. Athens, Greece; 20190225 - 20190301, 16 February 2019 (2019-02-16), XP051600269, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F96/Docs/R1%2D1902576%2Ezip> [retrieved on 20190216] *
NOKIA ET AL: "On Sidelink Resource Allocation", vol. RAN WG1, no. Spokane, USA; 20181112 - 20181116, 11 November 2018 (2018-11-11), XP051555577, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1813522%2Ezip> [retrieved on 20181111] *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220015099A1 (en) * 2020-07-09 2022-01-13 Samsung Electronics Co., Ltd. Power-efficient resource selection procedure for nr v2x ue with limited power
US20220322304A1 (en) * 2020-12-10 2022-10-06 Ofinno, Llc Sidelink Sensing Procedure
US11678302B2 (en) * 2020-12-10 2023-06-13 Ofinno, Llc Sidelink sensing procedure
US11601910B2 (en) * 2021-07-07 2023-03-07 Qualcomm Incorporated Sidelink control information (SCI)-triggered sidelink positioning
US20230120774A1 (en) * 2021-10-19 2023-04-20 Qualcomm Incorporated Relaxed sensing for new radio sidelink over millimeter wave operating frequencies
US11812458B2 (en) * 2021-10-19 2023-11-07 Qualcomm Incorporated Relaxed sensing for new radio sidelink over millimeter wave operating frequencies

Similar Documents

Publication Publication Date Title
US12004126B2 (en) Methods and devices of assigning resource for sidelink communication system
US11659371B2 (en) Resource selection method in vehicle to everything communication and apparatus therefore
US11695516B2 (en) Method and apparatus for handling device-to-device feedback in a wireless communication system
CN113411844B (zh) 无线通信系统中装置间侧链路资源选择的方法和设备
US11444729B2 (en) Transmitting feedback for data transmission through a sidelink
US11570797B2 (en) Method and apparatus of handling multiple device-to-device resources in a wireless communication system
US20230254883A1 (en) Method and apparatus for scheduling device-to-device sidelink transmission in a wireless communication system
WO2021064135A1 (fr) Dispositifs utilisateur pour un système de communication sans fil et procédés de communication dans un système de communication sans fil
US20220346118A1 (en) Resource allocation and a power control method for sidelink communication system
US20200029340A1 (en) Method and apparatus for nr v2x resource selection
JP6585170B2 (ja) 低電力スケジューリング
EP2912906B1 (fr) Procédés et systèmes d&#39;ordonnancement semi-persistant
EP3338391B1 (fr) Appareils et procédés de télécommunications
KR20190100933A (ko) V2X(vehicle to everything) 통신 방법 및 디바이스와 V2X 통신의 송수신 방법 및 장치
US8843151B2 (en) Systems and methods for providing data communications with burst transmissions
US20220279559A1 (en) Telecommunications apparatus and methods
US8982755B1 (en) Methods and systems for selecting a TTI bundle size
US20220417976A1 (en) Processing time determination method and device of terminal in wireless vehicle communication system
US20220132418A1 (en) Methods and apparatuses for radio communication
US20230199837A1 (en) Operating method, sending method, and related device
US8693408B2 (en) Methods and systems for subscriber station-based admission control
JP5018456B2 (ja) 通信方法、無線通信装置
KR101757173B1 (ko) 영속적인 스케줄링을 갖는 제어 채널 송신을 위한 방법
US9253681B1 (en) Physical resource block allocation for TTI bundling
CN115315914A (zh) 方法和通信装置

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: 20781374

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20781374

Country of ref document: EP

Kind code of ref document: A1