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Showing papers by "Stefan Parkvall published in 2021"


Proceedings ArticleDOI
13 Sep 2021
TL;DR: The Hexa-X project as mentioned in this paper aims to support high-resolution localization and sensing in the next generation of mobile communication, which will enable novel use cases requiring extreme localization performance and provide a means to support and improve communication functionalities.
Abstract: 6G will likely be the first generation of mobile communication that will feature tight integration of localization and sensing with communication functionalities. Among several worldwide initiatives, the Hexa-X flagship project stands out as it brings together 25 key players from adjacent industries and academia, and has among its explicit goals to research fundamentally new radio access technologies and high-resolution localization and sensing. Such features will not only enable novel use cases requiring extreme localization performance, but also provide a means to support and improve communication functionalities. This paper provides an overview of the Hexa-X vision alongside the envisioned use cases. To close the required performance gap of these use cases with respect to 5G, several technical enablers will be discussed, together with the associated research challenges for the coming years.

71 citations


Journal ArticleDOI

10 citations


Posted Content
TL;DR: The Hexa-X project as mentioned in this paper aims to support high-resolution localization and sensing in the next generation of mobile communication, which will enable novel use cases requiring extreme localization performance and provide a means to support and improve communication functionalities.
Abstract: 6G will likely be the first generation of mobile communication that will feature tight integration of localization and sensing with communication functionalities. Among several worldwide initiatives, the Hexa-X flagship project stands out as it brings together 25 key players from adjacent industries and academia, and has among its explicit goals to research fundamentally new radio access technologies and high-resolution localization and sensing. Such features will not only enable novel use cases requiring extreme localization performance, but also provide a means to support and improve communication functionalities. This paper provides an overview of the Hexa-X vision alongside the envisioned use cases. To close the required performance gap of these use cases with respect to 5G, several technical enablers will be discussed, together with the associated research challenges for the coming years.

1 citations


Patent
17 Feb 2021
TL;DR: In this article, the authors present a system and method for providing time domain allocations in a communication system, where an apparatus operable in communication system and including processing circuitry is configured to receive an indication of a time domain allocation in downlink control information associated with a radio network temporary identifier (RNTI) identifying the apparatus, and employ the time domain assignment associated with the RNTI for transmissions associated with an apparatus.
Abstract: A system and method for providing time domain allocations in a communication system. In an embodiment, an apparatus operable in a communication system and including processing circuitry is configured to receive an indication of a time domain allocation in downlink control information associated with a radio network temporary identifier (“RNTI”) identifying the apparatus, and employ the time domain allocation associated with the RNTI for transmissions associated with the apparatus. In another embodiment, an apparatus operable in a communication system and including processing circuitry is configured to associate a time domain allocation with a RNTI identifying a user equipment, and provide an indication of the time domain allocation in downlink control information to allow the user equipment to employ the time domain allocation associated with the RNTI for transmissions associated therewith.

Patent
30 Jun 2021
TL;DR: In this article, the authors proposed two mechanisms for monitoring search spaces: the first is to monitor the device-specific search space for at least one device specific reference signal (RS) and the second one monitors the non-device-specific RS.
Abstract: There are provided mechanisms for monitoring search spaces. A first method performed by a wireless device comprises receiving an OFDM symbol in a downlink slot. At least part of the OFDM symbol is included in a device-specific search space and in a common search space. The first method comprises monitoring the device-specific search space for at least one device-specific reference signal (RS) and monitoring the common search space for at least one non-device-specific RS. In a second method, a radio access network node transmits an OFDM symbol included in a device-specific search space and in a common search space. The device-specific search space contains a device-specific RS, or the non-device specific search space contains a non-device-specific RS, or both of these apply.


Patent
19 Mar 2021
TL;DR: In this paper, the authors proposed the slot format indicator (SFI) for the slot (68a) and determined the type of each of the symbols in the slot based on the number of uplink and downlink symbols.
Abstract: FIELD: wireless communication.SUBSTANCE: invention relates to the field of control signaling in a wireless communication system. Effect is achieved by following: in a wireless communication system (100), the access node (110) configures for a user device (UE) (105) each symbol in the slot (68a) separately as one of a plurality of possible symbol types. The types include an uplink symbol, a downlink symbol, and other symbol. The access node (110) transmits to the UE (105) an SFI determining the number of downlink symbols in the slot (68a) and the number of uplink symbols in the slot (68a) and indicating whether the slot (68a) includes other symbols. The UE (105) receives from the access node (110) the SFI for the slot (68a) and determines the type of each of the symbols in the slot (68a) based on the number of uplink symbols and the number of downlink symbols.EFFECT: technical result consists in ensuring the transmission of the slot format indicator (SFI) in efficient way.30 cl, 23 dwg

Patent
17 Feb 2021
TL;DR: In this paper, a method for signaling scheduling information in a spatial multiplexing wireless communications system (700), as well as corresponding methods and apparatus for processing such signaling information, are disclosed.
Abstract: Methods and apparatus for signaling scheduling information in a spatial multiplexing wireless communications system (700), as well as corresponding methods and apparatus for processing such signaling information, are disclosed. An exemplary method for signaling scheduling information comprises scheduling (310, 420) first and second transport blocks (110) for simultaneous transmission during a first transmission interval on first and second data substreams, respectively, and further comprises assigning (320, 430) a single re-transmission process identifier for the first transmission interval and transmitting(330, 440) first scheduling information for the first transmission interval. The first scheduling information comprises the re-transmission process identifier and first disambiguation data. The method further comprises scheduling (360, 470) at least one of the first and second transport blocks (110) for re-transmission during a second transmission interval and transmitting (370, 495) second scheduling information for the second transmission interval, the second scheduling information comprising the re-transmission process identifier and second disambiguation data. The first and second disambiguation data indicate whether the re-transmission of the retransmitted transport block (110) is scheduled for the first or second data substream and may be used by a receiver to determine the same.

Patent
24 Feb 2021
TL;DR: In this article, the authors proposed a method to improve the resource allocation delay and increase the number of UE that can use the resources of a specific PDCCH by more efficient use of the bits available for signaling resource allocation.
Abstract: FIELD: wireless networks.SUBSTANCE: method contains the following steps: transmitting to the terminal (User Equipment, hereinafter - UE) an indication of the active segment of the carrier bandwidth part (hereinafter – BWP) suitable for communication on the shared channel, selection of one or more frequency domain resource blocks (hereinafter – RB) within the BWP active segment for allocation to the UE terminal, encoding the indication of one or more selected blocks RB using the set of available bits, and the set of available bits is not enough to encode all combinations of blocks RB that can be allocated within the active segment of the BWP, transmitting the coded indication to the UE terminal on the downlink control channel.EFFECT: technical result is more efficient use of physical downlink control channel (hereinafter – PDCCH) in new radio technology (hereinafter – NR technology), resulting in improved resource allocation delay and an increase in the number of UE that can use the resources of a specific PDCCH; it is achieved by more efficient use of the bits available for signaling resource allocation.16 cl, 1 tbl, 25 dwg

Patent
05 Feb 2021
TL;DR: In this paper, the authors proposed a hybrid automatic repeat request (HARQ) scheme, where user equipment is configured by a pool of transmission resources, wherein the transmission resource pool comprises resources for transmitting feedback by the user equipment in form of a hybrid Automatic Repeat Request (ARQ).
Abstract: FIELD: physics.SUBSTANCE: invention relates to a method of operating user equipment in a radio access network, wherein user equipment is configured by a pool of transmission resources, wherein the transmission resource pool comprises resources for transmitting feedback by the user equipment in form of a hybrid automatic repeat request (HARQ). Method comprises a step of transmitting feedback in the form of a HARQ using a resource structure, wherein the resource structure is selected from a pool of transmission resources based on the signalling characteristic for the downlink control information (DCI) message, received by user equipment, wherein signalling characteristic is represented by resources in receiving resources pool, on which DCI message is received, wherein the resource structure is further selected based on the selection control information included in the DCI message.EFFECT: technical result consists in enabling reduced volume of transmitted service information.9 cl, 3 dwg