公开(公告)号：US11153795B2

公开(公告)日：2021-10-19

申请号：US16077455

申请日：2016-09-30

Applicant: Apple Inc.

Inventor： Candy Yiu ,  Yujian Zhang ,  Youn Hyoung Heo ,  Sudeep Palat ,  Mo-Han Fong

IPC: H04W36/02 ,  H04W36/18 ,  H04W36/00

Abstract: User equipment (UE) handover (HO) techniques for reducing or eliminating interruption time during an HO process are described. In one embodiment, for example, an apparatus may include at least one memory and logic for an evolved node B (eNB), at least a portion of the logic comprised in hardware coupled to the at least one memory. The logic may be operative to forward downlink (DL) data received from a serving gateway (SGW) to user equipment (UE), transmit a handover command to the UE to trigger execution of a handover (HO) process to handover the UE to a target eNB, continue forwarding at least a portion of the DL data to the UE following transmission of the handover command, and terminate transmission of the DL data to the UE responsive to detecting a stop DL data event. Other embodiments are described and claimed.

公开(公告)号：US11102694B2

公开(公告)日：2021-08-24

申请号：US16483181

申请日：2018-03-05

Applicant: Apple Inc.

Inventor： Candy Yiu

IPC: H04W36/30 ,  H04W76/11 ,  H04W36/32 ,  H04W48/20 ,  H04W84/00 ,  H04W84/04

Abstract: A network device such as an evolved NodeB (eNB) or next generation NodeB (gNB) can configure a set of user equipment (UE) to identify high speed train (HST) cell or high speed rail (HSR) dedicated longer term evolution (LTE) (HSDN) cells associated with a train or train station from a public LTE network. A UE can perform selection/reselection/handover operations to the HST LTE network cells with a higher priority based on various criteria, including a high mobility state of the UE, a marker, a cell ID, a measurement report comparison, or a location. Mobility state estimation of an HSDN cell can be based on a weight broadcast in a system information or system information block (SIB) of HSDN cell. A network load can further be considered in order to better serve high speed rail network conditions for users.

公开(公告)号：US11096076B2

公开(公告)日：2021-08-17

申请号：US15827221

申请日：2017-11-30

Applicant: APPLE INC.

Inventor： Yang Tang ,  Rui Huang ,  Candy Yiu

IPC: H04W24/10 ,  H04W24/02 ,  H04L5/00 ,  H04W72/04

Abstract: A prioritized cell identification and measurement method is disclosed. The method classifies frequency layers to be monitored and measured by an user equipment into normal- and reduced-performance groups. Several different embodiments are described. Where appropriate, the corresponding signaling design is also suggested. User equipment can adopt one or several of these embodiments, and can change configurations in a semi-static manner based on operating conditions.

公开(公告)号：US20210235331A1

公开(公告)日：2021-07-29

申请号：US17228482

申请日：2021-04-12

Applicant: Apple Inc.

Inventor： Candy Yiu

IPC: H04W36/00 ,  H04W36/38

Abstract: An apparatus of a base station (BS) of a radio access network (RAN) comprises memory and processing circuitry. The processing circuitry includes a central unit (CU) portion and a distributed unit (DUI) portion that implement a BS multi-layer protocol stack divided between the CU portion and the DU portion. The processing circuitry initiates a handover to change a serving cell of user equipment (UE). The handover includes a change in a portion of logical layers of the BS multi-layer protocol stack, and the processing circuitry encodes an information element for transmission to the UE indicating logical layers of a UE multi-layer protocol stack implemented in the UE to be reset by the UE in association with the handover.

公开(公告)号：US10904793B2

公开(公告)日：2021-01-26

申请号：US16067685

申请日：2016-06-27

Applicant: APPLE INC.

Inventor： Shadi Iskander ,  Nageen Himayat ,  Candy Yiu ,  Alexander Sirotkin ,  Jerome Parron ,  Ofer Hareuveni ,  Umesh Phuyal ,  Penny Efraim-Sagi

IPC: H04W28/08 ,  H04W76/16 ,  H04W28/02 ,  H04W28/06 ,  H04W88/06 ,  H04W80/08 ,  H04W84/12

Abstract: Uplink (UL) data splits between LTE and WLAN can be go supported in cellular networks. The split can be UE controlled or network controlled. Both UE and network controlled bearer split architectures can be supported. The reporting of Uplink Buffer Status (BSR) and the subsequent data allocation can depend on what option is supported by the network. For UE controlled UL data splits, the UE determines a traffic split ratio between LTE and WLAN. The split can be based on local link conditions. For network controlled UL data splits, the network (e.g. a Link Aggregation Scheduler at the eNB) is responsible for making bearer split decisions. The decisions can be based on link qualities, available traffic and quality of service (QoS) requirements of associated users. The split can be based on a per bearer threshold, an eNB configured ratio, or an implicit inference based on a UL grant.

公开(公告)号：US10856169B2

公开(公告)日：2020-12-01

申请号：US16324667

申请日：2017-06-29

Applicant: Apple Inc.

Inventor： Rui Huang ,  Yang Tang ,  Candy Yiu

IPC: H04W24/10 ,  H04W16/28 ,  H04W72/12

Abstract: New radio (NR), also known as fifth generation (5G) radio or fifth generation long term evolution (5G LTE)) uses a measurement gap that allows for measurement on different beams, multiple frame structure and inter-radio access technology measurement. For example, in measurement on the different beams, the UE (114) and eNB (304) beam sweep (i.e., change analog beam transmitter). The UE (114) can measure different beams from a fifth generation node B (gNB) and/or other RAN nodes. The measurement gap can be used for intrafrequency/interfrequency measurement when beam specific reference signals (BRSs) are not transmitted in the same subframe. A multiple frame structure can use the specific measurement configuration to utilize the beam resources efficiently. LTE and NR and other interRAT measurement can also use the measurement gap.

公开(公告)号：US10812169B2

公开(公告)日：2020-10-20

申请号：US16408357

申请日：2019-05-09

Applicant: Apple Inc.

Inventor： Jie Cui ,  Candy Yiu ,  Rui Huang ,  Yang Tang ,  Shuang Tian ,  Youn Hyoung Heo

IPC: H04B7/08 ,  H04B7/06 ,  H04W84/04

Abstract: Methods, systems, and storage media are described for user equipment (UE) measurements for new radio (NR). Other embodiments may be described and/or claimed.

公开(公告)号：US10785699B2

公开(公告)日：2020-09-22

申请号：US16366739

申请日：2019-03-27

Applicant: Apple Inc.

Inventor： Alexander Sirotkin ,  Candy Yiu ,  Qian Li ,  Sudeep K. Palat ,  Song Noh ,  Geng Wu ,  Lili Wei ,  Hassan Ghozlan ,  Dawei Ying ,  Ozgur Oyman ,  Thomas Luetzenkirchen ,  Shankar Sudhir Pola ,  Usharani Ayyalasomayajula

IPC: H04L12/701 ,  H04W40/22 ,  H04L12/721 ,  H04L29/08 ,  H04B7/26 ,  H04B7/155 ,  H04W92/12 ,  H04W88/08 ,  H04W80/02 ,  H04L12/751

Abstract: Embodiments of a Next Generation Node-B (gNB) and methods of communication are disclosed herein. The gNB may be configured with a gNB central unit (gNB-CU) and a gNB distributed unit (gNB-DU). The gNB-CU may determine a route for delivery of a data packet to a User Equipment (UE) on an integrated access backhaul (IAB) of relays. The gNB may generate a physical layer (PHY) data packet in accordance with a split between functionality of a packet data convergence protocol (PDCP) layer at the gNB-CU and functionality of a radio link control (RLC) layer at the gNB-DU. The PHY data packet may include the data packet, a PDCP header, an adaptation layer header, an RLC header, a medium access control (MAC) header, and a PHY header. The adaptation layer header may indicate one or more relays included in the route.

公开(公告)号：US10771203B2

公开(公告)日：2020-09-08

申请号：US16222904

申请日：2018-12-17

Applicant: Apple Inc.

Inventor： Candy Yiu ,  Yang Tang ,  Hyung-Nam Choi ,  Richard Burbidge ,  Youn Hyoung Heo

IPC: H04W24/10 ,  H04L5/00 ,  H04W36/00 ,  H04W76/16 ,  H04W4/02

Abstract: A user equipment (UE) operable to perform inter-frequency measurements is disclosed. The UE can decode an information element (IE) received from an eNodeB. The UE can determine whether the IE received from the eNodeB includes a reduced measurement performance field. The UE can determine that a neighboring inter-frequency is configured for a reduced measurement performance when the reduced measurement performance field is included in the IE.

公开(公告)号：US20200220581A1

公开(公告)日：2020-07-09

申请号：US16816807

申请日：2020-03-12

Applicant: Apple Inc.

Inventor： Candy Yiu

IPC: H04B7/0426 ,  H04B7/08 ,  H04B7/06 ,  H04B17/10 ,  H04B17/318 ,  H04B7/0408 ,  H04B17/336

Abstract: Aspects of filtering coefficient configuration operations are described. Some aspects include a user equipment (UE) decoding a measurement configuration information element (IE) including a measurement quantity parameter, a reference signal (RS)-type filter configuration and at least one filter coefficient. In some aspects, the UE filters at least one of a cell measurement result and a beam measurement result, according to the measurement configuration IE. If the measurement quantity parameter indicates the cell measurement quantity, the UE can filter the cell measurement result according to the RS type filter configuration and the filter coefficient to determine a measurement evaluation input for a measurement reporting operation. If the measurement quantity parameter indicates the beam measurement quantity, the UE can filter the beam measurement result according to the RS type filter configuration and the filter coefficient to determine a beam measurement selection input for a beam measurement selection operation.