Abstract:
A vehicle may wirelessly communicate with another vehicle via a physical channel (a vehicle-to-vehicle (V2V) channel) that is robust and reliable under high mobility propagation conditions. The physical channel may be created by modifying an existing long-term evolution (LTE) physical channel, such as an LTE sidelink (SL) channel. For instance, the V2V physical channel may be created by increasing, by a particular factor, the subcarrier spacing of legacy LTE channels (e.g., from 15 kilohertz (kHz) to 30 kHz). Additionally, a symbol duration and a fast Fourier transform (FFT) size for the V2V physical channel may each be reduced by the same factor. Doing so may enable the V2V physical channel to be implemented without significant modifications to other aspects of the LTE standard.
Abstract:
Embodiments of the present disclosure describe apparatuses and methods for selecting or extending time resource patterns relating to device-to-device (D2D) functionality. Various embodiments may include processing circuitry to select a subset of a predefined set of D2D time resource pattern bitmaps and generate a signal having information corresponding to the selected subset of D2D time resource pattern bitmaps. Other embodiments may be described and/or claimed.
Abstract:
Embodiments of the present disclosure describe apparatuses and methods for selecting or extending time resource patterns relating to device-to-device (D2D) functionality. Various embodiments may include processing circuitry to select a subset of a predefined set of D2D time resource pattern bitmaps and generate a signal having information corresponding to the selected subset of D2D time resource pattern bitmaps. Other embodiments may be described and/or claimed.
Abstract:
An evolved node (eNB) operable to transmit a Time Division Duplex (TDD) uplink-downlink (UL-DL) reconfiguration in a heterogeneous network (HetNet) is disclosed. The eNB can receive, from a user equipment (UE), a UE capability report that indicates the UE supports a TDD UL-DL reconfiguration functionality. The eNB can transmit, to the UE, a configuration to enable TDD UL-DL reconfiguration at the UE. The eNB can transmit, to the UE, a TDD UL-DL reconfiguration signal in a downlink control information (DCI) message. The UE can be configured to update a TDD UL-DL configuration of the UE based on the TDD UL-DL reconfiguration signal transmitted on a physical downlink control channel (PDCCH) in preconfigured downlink or special (DL/S) subframes by the eNB.
Abstract:
The position of User Equipment (UE) may be determined based on information communicated through direct UE-to-UE communications to obtain additional measurements of position metrics that can be used to determine relative or absolute positions of the UE. In one implementation, a UE may receive, via a direct connection with a second UE, a positioning reference signal from which timing information, relating to distance between the UE and second UE, is derivable; determine, based on the positioning reference signal, a first position metric that relates to a position of the UE with respect to the second UE; and determine, based at least on position metric, a location of the UE.
Abstract:
In embodiments, apparatuses, methods, and storage media may be described for mapping media access control (MAC) protocol data units (PDUs) that are used to transmit scheduling assignment (SA) discovery, and/or device-to-device (D2D) data. Embodiments herein may describe how one or more MAC PDUs may be mapped into a time resource pattern for transmissions (T-RPT). Embodiments herein may further describe examples of how and when a UE may skip subframes in transmissions of the SA and/or data. Additionally, embodiments herein may further describe examples of how a UE may behave if the UE cannot transmit one or more scheduled instances of SA or data. Additionally, embodiments herein may describe resolution of collisions of D2D discovery messages in the time domain. Other embodiments may be described and/or claimed.
Abstract:
Technology is discussed to allow transmission points within a Wireless Wide Area Network (WWAN) to adapt to Up Link (UL) and Down Link (DL) traffic demands independently. To mitigate potential interference arising from transmission points scheduled for conflicting UL and DL transmissions, measurements between transmission points can be made to indicate a level of coupling. Based on the various levels of coupling between transmission points, clusters can be formed. Where a high level of coupling is present, transmission points can be included in a common cluster. Where a low level of coupling is present, they can be isolated. Transmission points within the same cluster are scheduled with a common pattern of UL and DL transmissions to avoid interference. Transmission points in different clusters can have different patterns of UL and DL transmission to independently adapt to the relative demands for UL and DL transmissions experienced within these different clusters.
Abstract:
Techniques described herein may provide for the determination of the position of mobile devices based on information obtained through device-to-device (D2D) discovery or communications. Resource allocation schemes are described that allow efficient communication of signal location parameters, via D2D discovery, communications or newly defined physical channels, that may be used to estimate the position (or improve position estimation) of the mobile device.
Abstract:
Various embodiments herein provide techniques related to adjustment of contention window size for new radio (NR) sidelink (SL) systems. Specifically, embodiments may relate to NR SL systems operating in the frequency range 1 (FR-1) unlicensed band, and using type 1 listen-before-talk (LBT). Embodiments further relate to LBT bandwidth (BW) definitions in such systems. Other embodiments may be described and/or claimed.
Abstract:
Methods, systems, and storage media are described for new radio downlink positioning reference signal (NR DL PRS) resource allocation and configuration. In particular, some embodiments relate to some embodiments relate to NR DL PRS resource configurations such as comb size, number of symbols, DL PRS resource time configuration (e.g., initial start time and periodicity), and providing formulas for calculation of seed for DL PRS sequence generation. Other embodiments may be described and/or claimed.