METHOD OF ACCESS AND LINK ADAPTATION FOR COVERAGE ENHANCED WIRELESS TRANSMISSIONS

    公开(公告)号:EP4075887A1

    公开(公告)日:2022-10-19

    申请号:EP22177119.9

    申请日:2015-01-28

    摘要: A method implemented in a wireless transmit and receive unit, WTRU, the method comprising: transmitting a physical random access channel preamble on first uplink resources; receiving a random access response which comprises a scheduling grant, the scheduling grant comprising first and second bit fields, wherein the first bit filed indicates second uplink resources, and wherein the second bit filed indicates a modulation and coding scheme index or at least a portion of the second bit filed indicates a number of repetitions based on at least one of the physical random access channel preamble and the first uplink resources; and transmitting a physical uplink shared channel transmission, wherein: the physical uplink shared channel transmission is transmitted on the second uplink resources for a number of times corresponding to the number of repetitions based on the at least a portion of the second bit field indicating the number of repetitions; and the physical uplink shared channel transmission is transmitted on the second uplink resources without repetition based on the second bit field indicating the modulation and coding scheme index.

    METHODS, SYSTEMS AND APPARATUS FOR SCHEDULING OF SUBFRAMES AND HYBRID AUTOMATIC REPEAT REQUEST (HARQ) FEEDBACK

    公开(公告)号:EP4075703A1

    公开(公告)日:2022-10-19

    申请号:EP21213817.6

    申请日:2017-02-03

    IPC分类号: H04L1/18

    摘要: Methods, systems and apparatus are provided for hybrid automatic repeat request (HARQ) processes for different transmission time interval (TTI) lengths. A wireless transmit/receive unit (WTRU) may link a first HARQ process and a second HARQ process. The WTRU may transmit a first transport block (TB) using the linked first HARQ process and a first HARQ buffer. The WTRU may receive a uplink (UL) grant and determine that the received UL grant is for a new transmission for the linked second HARQ process. The WTRU may release the first HARQ buffer based on a determination that the received UL grant is for the new transmission for the linked second HARQ process. Also, the WTRU may generate a second TB for the new transmission and store the new TB in the first HARQ buffer. The WTRU may transmit the second TB using the linked second HARQ process and the first HARQ buffer.

    METHOD AND WIRELESS RECEIVE/TRANSMIT UNIT FOR MULTICAST TRANSMISSION

    公开(公告)号:EP4064738A1

    公开(公告)日:2022-09-28

    申请号:EP22157079.9

    申请日:2017-05-19

    IPC分类号: H04W4/06

    摘要: Methods, apparatus, systems and procedures to manage a multicast communication to a multicast group implemented by a respective wireless transmit/receive unit (WTRU) of WTRUs in the multicast group are disclosed. One representative method includes receiving, by the respective WTRU of the multicast group, a configuration, the configuration indicating a Random Access Channel (RACH) preamble to use for a negative acknowledgement (NACK) response to a multicast transmission to the respective WTRU, monitoring, by the respective WTRU, for data of the multicast transmission, determining, by the respective WTRU, whether the monitored for data was successfully received; and on condition that the monitored for data was not successfully received, sending, by the respective WTRU, the RACH preamble indicated by the received configuration.