Provision and use of gaps for reference signal time difference measurements

    公开(公告)号:US11470440B2

    公开(公告)日:2022-10-11

    申请号:US16054257

    申请日:2018-08-03

    Abstract: Disclosed embodiments facilitate UE location determination in systems with dense PRS configurations, reduced PRS periodicity, frequency hopping, and involving UE inter-frequency measurements. The techniques may be applied to Bandwidth reduced-Low complexity (BL) UEs, or enhanced Machine Type Communication (eMTC) UEs or Further enhanced MTC (FeMTC) UEs and/or in LTE-M systems. A method on a UE may comprise: receiving a Reference Signal Time Difference (RSTD) measurement request; transmitting, in response to the RSTD measurement request, a dedicated gap request comprising a requested configuration of dedicated gaps; and receiving, in response to the dedicated gap request, a message comprising a dedicated gap configuration. The dedicated gap request may comprise a request for dedicated measurement gaps and the message may comprise a dedicated measurement gap configuration. In some embodiments, the dedicated gap request may comprise a request for dedicated autonomous gaps and the message may comprise a dedicated autonomous gap configuration.

    Sounding reference signal enhancements for unlicensed spectrum

    公开(公告)号:US11463885B2

    公开(公告)日:2022-10-04

    申请号:US16914794

    申请日:2020-06-29

    Abstract: A user equipment (UE) may employ an extended cyclic prefix, a postfix, or both for sounding reference signal (SRS) transmissions, such that gaps between SRS transmissions are long enough for UE antenna switching operations, but shorter in duration than any maximum channel vacancy time durations set by a wireless communications system. Further, UEs may transmit SRSs to base stations in accordance with an SRS configuration. For example, a base station may provide SRS configuration information to a UE that indicates, for example, information related to SRS scheduling, subband information, a cyclic prefix length, a cyclic postfix length, listen-before-talk (LBT) type information, an SRS trigger, an SRS cancellation procedure, or any combinations thereof. Based on such SRS configuration information, a UE may perform partial subband SRS techniques, subband selection techniques, SRS bandwidth adaptation techniques, LBT type configuration techniques, etc.

    Handling downlink assignment indicators for different types of downlink control information

    公开(公告)号:US11463195B2

    公开(公告)日:2022-10-04

    申请号:US16830132

    申请日:2020-03-25

    Abstract: Methods, systems, and devices for wireless communications are described to enable a user equipment (UE) to identify one or more missed downlink control messages. The UE may use indicators received with downlink control messages to order the downlink control messages and determine if a message is missing. Indicators in different downlink control messages may be transmitted using different numbers of bits, and the UE may use methods to compare the indicators with different bit sizes. The UE may compare all the indicators using the smallest indicator bit size or may compare indicators in sequential pairs, using a shared bit size for indicators having a same bit size and using a smallest bit size for indicators having different bit sizes. After comparing indicators and determining if one or more messages are missing, the UE may notify the base station of any missing downlink control messages using a feedback message.

    Bandwidth part (BWP) configuration for subband access in new radio-unlicensed (NR-U)

    公开(公告)号:US11363630B2

    公开(公告)日:2022-06-14

    申请号:US16287893

    申请日:2019-02-27

    Abstract: Wireless communications systems and methods related to communicating in a frequency band based on bandwidth parts are provided. A first wireless communication device communicates with a second wireless communication device, a first configuration indicating a plurality of bandwidth parts in a frequency band, the plurality of bandwidth parts based on an expected channel access pattern associated with a listen-before-talk (LBT) in the frequency band. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first bandwidth part of the plurality of bandwidth parts based on an LBT result.

    Managing paging monitoring by a wireless device

    公开(公告)号:US11330555B2

    公开(公告)日:2022-05-10

    申请号:US16907095

    申请日:2020-06-19

    Abstract: This disclosure provides systems, methods and apparatus, and computer programs encoded on computer storage media, for managing paging monitoring by a wireless device. In one aspect, the wireless device may receive a serving cell signal from a cell. The wireless device may determine a delay time based on the serving cell signal. The wireless device may monitor for the paging signal during the determined delay time. The wireless device may stop the monitoring for the paging signal upon or after expiration of the determined delay time. In some aspects, the wireless device may receive an indication of multiple paging signal monitoring occasions from the cell, which may include an indication of a number of synchronization signal blocks (SSBs) to be transmitted from the cell and a number of physical downlink control channel (PDCCH) monitoring occasions per SSB in a paging occasion.

    SCHEDULING FOR POSITIONING REFERENCE SIGNAL (PRS) IN NARROWBAND-INTERNET OF THINGS (NB-IOT)

    公开(公告)号:US20220021501A1

    公开(公告)日:2022-01-20

    申请号:US17449739

    申请日:2021-10-01

    Abstract: Wireless communications systems and methods related to communicating positioning reference signals (PRSs) for narrowband communication are provided. A first wireless communication device determines a time-frequency PRS pattern based at least in part on a narrowband communication frequency band configuration and a PRS subframe configuration mode associated with a set of subframes. The first wireless communication device communicates, with a second wireless communication device, a plurality of PRSs using the determined PRS time-frequency pattern in the set of subframes. The PRS subframe configuration mode can indicate a first configuration including a bitmap indicating a set of PRS subframes positioned within a group of contiguous subframes, a second configuration indicating a subset of the group of contiguous subframes that may carry the PRSs, or a combination thereof. The first configuration and/or the second configuration can be used to indicate the set of subframes.

    GROUP-BASED ACKNOWLEDGMENT FEEDBACK TECHNIQUES FOR WIRELESS COMMUNICATIONS

    公开(公告)号:US20210351871A1

    公开(公告)日:2021-11-11

    申请号:US17381501

    申请日:2021-07-21

    Abstract: Methods, systems, and devices for wireless communications are described that support group-based acknowledgment feedback techniques. Two or more different groups of downlink transmissions may each have an associated group-based acknowledgment feedback, and a base station may transmit downlink control information to a UE that indicates one or more parameters that are used to determine which downlink transmissions are to be reported in the group-based feedback. Based on the parameters in the downlink control information, the UE may determine the feedback to be reported, and a timing for when to transmit the feedback to the base station.

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