公开(公告)号：US10771987B2

公开(公告)日：2020-09-08

申请号：US15935402

申请日：2018-03-26

Applicant: Apple Inc.

Inventor： Konstantinos D. Dimou ,  Gang Xiong ,  Seunghee Han ,  Hong He

IPC: H04W24/02 ,  H04W48/12 ,  H04W24/08 ,  H04W74/08 ,  H04W74/00 ,  H04W36/08

Abstract: Embodiments of a User Equipment (UE) to operate in accordance with a physical random access channel (PRACH) are disclosed herein. The UE may comprise hardware processing circuitry to determine a coverage enhancement category for the UE based on downlink channel statistics related to reception of downlink signals at the UE from an Evolved Node-B (eNB) and an uplink-downlink imbalance parameter related to uplink reception at the eNB. The hardware processing circuitry may be further to select, for use in a coverage enhancement mode, a PRACH preamble from a set of candidate PRACH preambles based on the determined coverage enhancement category for the UE. In some embodiments, at least some of the candidate PRACH preambles may span a different number of sub-frames.

公开(公告)号：US11304073B2

公开(公告)日：2022-04-12

申请号：US16997051

申请日：2020-08-19

Applicant: Apple Inc.

Inventor： Konstantinos D. Dimou ,  Gang Xiong ,  Seunghee Han ,  Hong He

IPC: H04W24/02 ,  H04W48/12 ,  H04W24/08 ,  H04W74/08 ,  H04W74/00 ,  H04W36/08

Abstract: Embodiments of a User Equipment (UE) to operate in accordance with a physical random access channel (PRACH) are disclosed herein. The UE may comprise hardware processing circuitry to determine a coverage enhancement category for the UE based on downlink channel statistics related to reception of downlink signals at the UE from an Evolved Node-B (eNB) and an uplink-downlink imbalance parameter related to uplink reception at the eNB. The hardware processing circuitry may be further to select, for use in a coverage enhancement mode, a PRACH preamble from a set of candidate PRACH preambles based on the determined coverage enhancement category for the UE. In some embodiments, at least some of the candidate PRACH preambles may span a different number of sub-frames.

公开(公告)号：US20200382970A1

公开(公告)日：2020-12-03

申请号：US16997051

申请日：2020-08-19

Applicant: Apple Inc.

Inventor： Konstantinos D. Dimou ,  Gang Xiong ,  Seunghee Han ,  Hong He

IPC: H04W24/02 ,  H04W48/12 ,  H04W24/08 ,  H04W74/08

Abstract: Embodiments of a User Equipment (UE) to operate in accordance with a physical random access channel (PRACH) are disclosed herein. The UE may comprise hardware processing circuitry to determine a coverage enhancement category for the UE based on downlink channel statistics related to reception of downlink signals at the UE from an Evolved Node-B (eNB) and an uplink-downlink imbalance parameter related to uplink reception at the eNB. The hardware processing circuitry may be further to select, for use in a coverage enhancement mode, a PRACH preamble from a set of candidate PRACH preambles based on the determined coverage enhancement category for the UE. In some embodiments, at least some of the candidate PRACH preambles may span a different number of sub-frames.