Method for random access, user equipment and base station

    公开(公告)号:US11617214B2

    公开(公告)日:2023-03-28

    申请号:US17329016

    申请日:2021-05-24

    摘要: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.
    Embodiments of the present invention provide a method for RACH re-attempt, a user equipment and a base station. The method comprises the steps of: by a base station, determining system configuration information and transmitting the system configuration information to a user equipment; and then, by the user equipment, transmitting a preamble sequence to perform random access, and if the random access is failed, performing RACH attempt according to the received RACH re-attempt configuration information to perform random access until a preset decision condition is satisfied. The embodiment of the present invention is used for RACH re-attempt when random access fails.

    Methods, base station, UE and computer medium for transmitting data, HARQ-ACK, and OFDM symbols

    公开(公告)号:US11490376B2

    公开(公告)日:2022-11-01

    申请号:US16406260

    申请日:2019-05-08

    IPC分类号: H04W72/04 H04W74/08 H04L5/00

    摘要: A method of transmitting data is provided. The method of transmitting data includes transmitting, to a user equipment (UE), information on frequency domain resources of at least one subband on which carrier sensing is to be performed, performing carrier sensing on the at least one subband, and allocating idle resources within one or more subbands to the UE, and transmitting to the UE control information indicating the resources allocated to the UE. The disclosure also provides a method of transmitting a HARQ-ACK, a method of transmitting an OFDM symbol, a base station, a UE, and a computer readable medium.

    Random access method, user equipment and base station

    公开(公告)号:US11452140B2

    公开(公告)日:2022-09-20

    申请号:US16730520

    申请日:2019-12-30

    摘要: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a random access method, including: acquiring configuration information, transmitting a first message including a preamble and an uplink shared channel according to the configuration information, and receiving a second message including contention resolution information from a base station.

    Method and apparatus for transmitting uplink demodulation reference signals

    公开(公告)号:US11323967B2

    公开(公告)日:2022-05-03

    申请号:US16460403

    申请日:2019-07-02

    摘要: A method and an apparatus for transmitting uplink demodulation reference signals (DMRSs) is provided. The method includes a user equipment (UE) determines an uplink DMRS format for demodulating a physical uplink shared channel (PUSCH) according to frequency-domain resources occupied by the PUSCH, in which the uplink DMRS format includes a comb occupied by a PUSCH DMRS sequence. The comb is subcarriers having specified intervals occupied by demodulation reference signals, and the specified intervals between the occupied subcarriers are same. For the DMRSs using the comb format, subcarriers with specific intervals are used for channel estimation, and values of the channel estimation are used for data demodulation. The UE transmits uplink information and the demodulation reference signals on physical resources using the uplink DMRS format. The present disclosure can improve the multiplexing ratio of uplink physical resources in a multi-UE scenario.

    Method and apparatus for performing random access

    公开(公告)号:US11246164B2

    公开(公告)日:2022-02-08

    申请号:US16478460

    申请日:2018-01-16

    摘要: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present application discloses a method for generating a random access preamble, comprising the following steps of: receiving random access configuration information, the random access configuration information comprising preamble resource pool information, the preamble resource pool information comprising available base sequences; generating M sequences according to a base sequence, the M being greater than 1; and, generating a random access preamble according to the M sequences. The present application further discloses a device for generating a random access preamble, and a method and device for indicating random access configuration information. With the technical solutions disclosed by the present application, high frequency band multi-beam operations in 5G can be adapted, and the performance of the system in the random access process can be improved.

    System and method for common and UE-specific frequency resource scheduling

    公开(公告)号:US11212799B2

    公开(公告)日:2021-12-28

    申请号:US16305856

    申请日:2017-05-30

    IPC分类号: H04W72/04 H04L5/00

    摘要: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a resource scheduling method, which includes: determining, by a UE, a resource allocation indicating way in DCI of a first type search space and a resource allocation indicating way in DCI of a second type search space, wherein the resource allocation indicating way comprises an allocation unit of a UE frequency resource and a bandwidth and a location of all frequency resources available for UE frequency resource allocation; in the first type search space and the second type search space, performing, by the UE, blind detection for PDCCH/EPDCCH on the bandwidth and the location of all the frequency resources available for the UE frequency resource allocation in the corresponding resource allocation indicating way according to the allocation unit of the UE frequency resource in the corresponding resource allocation indicating way, determining a bandwidth and a location of an uplink resource and/or a downlink resource actually allocated for the UE. According to the present disclosure, in a condition that the UE cannot support the entire system bandwidth, an uplink resource and a downlink resource allocated by a base station can still be appropriately determined.

    Method and apparatus for transmitting UCI in wireless communication system

    公开(公告)号:US11101943B2

    公开(公告)日:2021-08-24

    申请号:US16477840

    申请日:2018-01-12

    IPC分类号: H04L1/18 H04L1/16 H04W72/04

    摘要: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure discloses a method of a user equipment (US) for transmitting uplink control information (UCI) in a wireless communication system. The method performed by the user equipment includes: determining a hybrid automatic retransmission request (HARQ) timing or HARQ timings of a dynamically scheduled physical downlink shared channel (PDSCH) and/or a semi-persistent scheduling (SPS) PDSCH and/or a physical downlink control channel (PDCCH) that indicates SPS releasing according to information sent from a base station; and transmitting generated hybrid automatic retransmission request acknowledgement (HARQ-ACK) information according to the HARQ timing or the HARQ timings determined. By applying present disclosure, it is possible to simplify the HARQ-ACK timing determination mode and can perform HARQ-ACK information transmission in time.

    Method, base station apparatus and user equipment for random access

    公开(公告)号:US11096218B2

    公开(公告)日:2021-08-17

    申请号:US16348379

    申请日:2017-11-24

    摘要: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Compared to the prior art, the present invention transmits a multiple of subsequences in a preamble sequence at a multiple of random access transmission occasions by using design of random access channel structure so as to increase the success rate of the detection and access efficiency.