Contention resolution in random access procedure

    公开(公告)号:US12250731B2

    公开(公告)日:2025-03-11

    申请号:US17431674

    申请日:2019-02-22

    Abstract: Embodiments of the disclosure provide a method, device and computer readable medium for contention resolution in RACH. According to embodiments of the present disclosure, the terminal devices transmit random access requests in random access channels and the network device transmits the response to the random access requests on the downlink control channel addressed to the common identifier. According to embodiments of the present disclosure, there is one to multiple mapping for contention resolution radio network temporary identifier (CR-RNTI) and physical RACH (PRACH). In this way, the number of RNTIs is decreased and the overhead is reduced.

    Methods and apparatuses for signaling procedure

    公开(公告)号:US12193069B2

    公开(公告)日:2025-01-07

    申请号:US17771039

    申请日:2019-11-01

    Abstract: Disclosed are apparatuses and methods for a signaling procedure. An example method may include transmitting a first portion of a signaling message in a first sub-band and transmitting a second portion of the signaling message in a second sub-band, the second portion including an indication to the first portion transmitted in the first sub-band. Related apparatuses and computer readable medium are also disclosed.

    Bandwidth part switching due to LBT failure

    公开(公告)号:US12144020B2

    公开(公告)日:2024-11-12

    申请号:US17429878

    申请日:2019-02-13

    Abstract: Embodiments of the present disclosure relate to a device, a method, an apparatus and a computer readable storage medium for bandwidth part (BWP) switching. In example embodiments, a method is provided. The method comprises determining, at a terminal device, whether continuous Listen-Before-Talk (LBT) failures occur on a first bandwidth part (BWP), the terminal device operating on the first BWP. The method further comprises in response to the continuous LBT failures occurring on the first BWP, switching to a second BWP different from the first BWP. Instead of triggering a re-establishment procedure once continuous LBT failures are detected, switching to another BWP on different LBT sub-channels can be much more efficient than going through the whole re-establishment and reconfiguration procedures.

    Increasing preamble transmission opportunities for random access in unlicensed band

    公开(公告)号:US12082260B2

    公开(公告)日:2024-09-03

    申请号:US17430170

    申请日:2019-02-14

    CPC classification number: H04W74/0833 H04W16/14

    Abstract: In accordance with some embodiments, a method may include selecting, by a user equipment, at least one random access occasion associated with at least one contention based random access resource and at least one random access occasion associated with at least one contention free random access resource. The method may further include detecting, by the user equipment, a predetermined number of listen before talk failures associated with one or more of the at least one random access occasion associated with at least one contention free random access resource. The method may further include transmitting, by the user equipment, in response to detecting a predetermined number of listen before talk failures, according to the selected at least one random access occasion associated with at least one contention based random access resource.

    Methods and apparatuses for prioritized random access during handover

    公开(公告)号:US11930405B2

    公开(公告)日:2024-03-12

    申请号:US16965707

    申请日:2018-02-14

    CPC classification number: H04W36/0055 H04W74/0833

    Abstract: Systems, methods, apparatuses, and computer program products for prioritized random access during handover are provided. One method may include transmitting, by a source network node, a handover request to a target network node. The handover request may include an indication of a recognition of prioritized random access for a user equipment. The method may also include receiving an acknowledgement from the target network node, building a reconfiguration message, for the user equipment, comprising a prioritized set of random access parameters, and transmitting, to the user equipment, the reconfiguration message comprising the prioritized set of random access parameters.

    RECEIVING RANDOM ACCESS RESPONSE WITH EXTENDED RESPONSE WINDOW

    公开(公告)号:US20230247679A1

    公开(公告)日:2023-08-03

    申请号:US18132546

    申请日:2023-04-10

    CPC classification number: H04W74/0833 H04W72/23

    Abstract: Method, apparatuses, and computer program product for addressing random access responses with extended response windows. One method may include accessing, by a user equipment, a network by sending a random access channel preamble to a network element. The method may also include receiving, in response to the random access channel preamble, a random access response from the network element. The random access response provides an indication of which random access channel occasion in time within a span of one or a plurality of radio frames the random access response applies.

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