Inter-beam mobility control in MIMO communication systems

    公开(公告)号:US10333608B2

    公开(公告)日:2019-06-25

    申请号:US15747027

    申请日:2015-12-22

    摘要: Apparatus, systems, and methods to implement inter-beam mobility control in MIMO communication systems are described. In one example, apparatus of an evolved Node B (eNB) comprises circuitry to configure a periodic transmit (TX) beamforming process for a user equipment (UE), wherein a plurality of different TX beams are used in a plurality of different beamforming reference signals (BRS), receive, from the UE, a selected TX beam index which identifies a selected TX beam, and schedule subsequent transmissions to the UE on the selected TX beam. Other examples are also disclosed and claimed.

    ACK/NACK SIGNALS FOR NEXT GENERATION LTE DEVICES AND SYSTEMS

    公开(公告)号:US20180139014A1

    公开(公告)日:2018-05-17

    申请号:US15574681

    申请日:2015-12-18

    IPC分类号: H04L1/18 H04W72/04

    摘要: Devices and methods of providing symmetric UL and DL ACK/NACKs is generally described. UL ACK/NACKs of different UEs are multiplexed and received by a UE with a PUSCH. The receiving UE in response transmits the DL ACK/NACK. The ACK/NACK may be transmitted in a localized or distributed manner among subbands that may be adjacent or each may have blocks separated by blocks of a different subband. The ACK and NACK may use independent resources or the NACK may not be transmitted on the single ACK/NACK resource, the lack of an ACK serving as a NACK. The ACK/NACK may be transmitted using a beamforming weight shaped by the received PUSCH/PDSCH. The ACK/NACK symbol may be located in the first symbol, adjacent to the PUSCH/PDSCH, or at the end of a TTI. If adjacent, the UL grant or UL assignment may indicate whether the ACK/NACK resource is used by the PUSCH/PDSCH.