Method and apparatus for efficient acquisition of preambles with enhanced interference mitigation
    51.
    发明授权
    Method and apparatus for efficient acquisition of preambles with enhanced interference mitigation 有权
    用于有效获取前导码的方法和装置,具有增强的干扰减轻

    公开(公告)号:US08798221B1

    公开(公告)日:2014-08-05

    申请号:US13833933

    申请日:2013-03-15

    CPC classification number: H04L7/042 H04L7/007 H04L27/2662 H04L27/2692

    Abstract: Various aspects of an approach for acquiring sequences such as balanced Hamming weight preamble sequences are described herein. The approach provides for the acquisition of preamble sequences base on energy accumulation. The approach includes creating a plurality of synchronization hypotheses, with each hypothesis being created based on energies sampled at a first location and a second location in a plurality of locations associated with a sequence of transmitted symbols; calculating a plurality of metrics based on the plurality of synchronization hypotheses, wherein each metric is associated with a hypothesis; selecting, as a candidate, one hypothesis from the plurality of synchronization hypotheses including a maximum associated metric. The approach may further include determining a boundary in the sequence of transmitted symbols based on a correlation property of the sequence of transmitted symbols. The second location includes a predetermined offset from the first location configured to provide enhanced interference immunity.

    Abstract translation: 本文描述了用于获取诸如平衡汉明权重前导序列之类的序列的方法的各个方面。 该方法提供了基于能量积累的前导码序列的获取。 该方法包括创建多个同步假设,其中每个假设是基于在与发射符号序列相关联的多个位置中的第一位置和第二位置处采样的能量来创建的; 基于所述多个同步假设来计算多个度量,其中每个度量与假设相关联; 从包括最大关联度量的多个同步假设中选择作为候选者的一个假设。 该方法可以进一步包括基于发送符号序列的相关属性来确定发送符号序列中的边界。 第二位置包括从配置成提供增强的抗干扰能力的第一位置的预定偏移。

    Environment-dependent safety messaging

    公开(公告)号:US12069615B2

    公开(公告)日:2024-08-20

    申请号:US17543293

    申请日:2021-12-06

    CPC classification number: H04W72/02 G08G1/012 H04W4/40 H04W72/1263

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a first safety message associated with the UE. The first safety message may be transmitted according to a first periodicity of a set of transmission periodicities for safety message transmissions. The UE may select a second periodicity of the set of transmission periodicities based on one or more environmental conditions associated with the UE. The UE may transmit a second safety message associated with the UE according to the second periodicity of the set of transmission periodicities based at least in part on selecting the second periodicity. The one or more environmental conditions may include topological information, road information, or visibility information. The UE may select the second periodicity based on one or more parameters associated with the UE.

    Vehicle-to-everything (V2X) message monitoring

    公开(公告)号:US12058621B2

    公开(公告)日:2024-08-06

    申请号:US17308860

    申请日:2021-05-05

    CPC classification number: H04W52/0261 G01D21/02 G01P13/00 H04W4/40

    Abstract: This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a method for wireless communication by a user equipment (UE) includes monitoring for one or more vehicle-to-everything (V2X) messages based on a first monitoring interval, and determining a second monitoring interval based on a UE characteristic, an environment characteristic, or a combination thereof. The method may also include monitoring for the one or more V2X messages based on the second monitoring interval. Other aspects and features are also claimed and described.

    Roadside user alert techniques based on location accuracy

    公开(公告)号:US12004047B2

    公开(公告)日:2024-06-04

    申请号:US17545346

    申请日:2021-12-08

    CPC classification number: H04W4/029 G08G1/166 H04W4/06 H04W72/51

    Abstract: Methods, systems, and devices for wireless communications are described in which a vulnerable road user (VRU) user equipment (UE) indicates to a user whether a current position accuracy is sufficient or insufficient for approaching vehicles to determine if they present a hazard to the VRU. The position accuracy may be based on an accuracy threshold that is configured at the UE, such as by a serving base station or a road side unit (RSU). The accuracy threshold may be configured via common or dedicated signaling, through application-layer signaling, or may be pre-configured in the UE. When the VRU UE position accuracy exceeds the specified threshold for a particular interval of time, the UE may inform the user that approaching vehicles will be unable to determine their location with enough accuracy to take evasive maneuvers.

    Positioning reference signal adaptation in distributed ranging system

    公开(公告)号:US11991662B2

    公开(公告)日:2024-05-21

    申请号:US17161343

    申请日:2021-01-28

    CPC classification number: H04W64/006 G01S5/0205

    Abstract: Multiple user equipments (UEs) may initiate independent ranging sessions at nearly the same time and location and which may interfere with each other. A UE that receives multiple initial messages for ranging determines if there is temporal separation between the ranging sessions. The UE may further determine if there is geographic separation between the ranging sessions, e.g., the initiating UEs are separated. If separation is lacking, the UE separates available ranging signal properties, such as frequency bandwidth, timing instances, and identifiers, and communicates different sets of ranging signal properties to each initiating UE. The multiple ranging sessions may be performed using the different sets of ranging signal properties with less risk of interference.

    Position-aware resource allocation for a wireless in-vehicle network

    公开(公告)号:US11930514B2

    公开(公告)日:2024-03-12

    申请号:US17354512

    申请日:2021-06-22

    CPC classification number: H04W72/51 H04W4/48 H04W72/0453 H04W72/541

    Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a vehicle may identify a set of zones of the vehicle, each zone including a number of components connected to a wireless in-vehicle network of the vehicle. A scheduler of the vehicle may associate a different set of frequency resources to each zone of the vehicle and may allocate frequency resources to each component of the vehicle from the set of frequency resources associated with the zone in which the component is located. The scheduler may associate the different sets of frequency resources with the different zones of the vehicle such that two zones that are located at opposite sides or ends of the vehicle may be associated with sets of frequency resources that are spaced in frequency from each other by a maximum frequency spacing.

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