公开(公告)号：US10855501B2

公开(公告)日：2020-12-01

申请号：US15979092

申请日：2018-05-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianglei Ma ,  Lu Rong ,  Liqing Zhang

IPC: H04L27/26 ,  H04L5/00 ,  H04L29/08

Abstract: It is possible to reduce the implementation complexity associated with dynamic carrier configuration by defining overlapping sets of candidate numerologies for at least some carriers in the network. A common numerology is included in sets of candidate numerologies pre-associated with two different carriers. This reduces the amount of numerologies that need to be supported by the corresponding user equipments (UEs) and base stations, which in turn reduces the complexity of those devices, e.g., less complex hardware, protocol stacks, and software, lower storage and processing requirements, etc. The common numerology specifies a common subset of physical layer parameters for both carriers. In one example, the common numerology specifies the same sub-carrier frequency spacing and symbol duration for both carriers. The common numerology may further specify the same cyclic prefix (CP) length for symbols communicated over both carriers.

公开(公告)号：US20200119774A1

公开(公告)日：2020-04-16

申请号：US16710599

申请日：2019-12-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Jianglei Ma ,  Kelvin Kar Kin Au ,  Nimal Gamini Senarath

IPC: H04B7/024 ,  H04W24/08 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0413

Abstract: Embodiments are provided for uplink measurement based mechanism and control using user equipment (UE) centric sounding signals. The mechanism provides an alternative to DL-measurement dominated system control. Based on UL-measurements at TPs, the network obtains knowledge of users' channel and timing information, traffic, and interference, and is thus able to perform better control, including TP and UE clustering and optimization, and power control and link adaptation. In an embodiment method, a TP receives one-to-one mapping information indicating a plurality of UE IDs and a plurality of sounding channels assigned to the corresponding UE IDs. When the TP detects a sounding reference signal (SRS) from a UE, the TP is able to identify the UE using the detected SRS and the one-to-one mapping information. The TP then obtains measurement information for the identified UE, enabling better control and communications for uplink and downlink transmissions between multiple TPs and the UE.

公开(公告)号：US10476651B2

公开(公告)日：2019-11-12

申请号：US15729228

申请日：2017-10-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Hao Tang ,  Xinxian Li ,  Zhenfei Tang

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26

Abstract: A method, system, and device to obtain a basic subcarrier spacing, or a channel bandwidth, or a maximum transmission bandwidth, or a usable subcarrier spacing set via a predefined mapping rule is provided. In an embodiment, a method in a network component to determine a system numerology includes determining, by the network component, one or more subcarrier spacing options from a candidate subcarrier spacing set that is associated with a carrier frequency band. The method also includes transmitting, by the network component, a signal indicating to one or more UEs one or more subcarrier spacing options from the candidate subcarrier spacing set.

公开(公告)号：US20190342848A1

公开(公告)日：2019-11-07

申请号：US16511674

申请日：2019-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Yalin Liu ,  Qinghai Zeng ,  Xiaoying Xu ,  Jianglei Ma

IPC: H04W56/00 ,  H04W74/00 ,  H04B7/0417

Abstract: A method and apparatus for timing advance (TA) synchronization for uplink (UL) data transmissions are provided. A base station transmits a TA instruction to a UE. The TA instruction indicates one of at least two TA options. The first TA option indicates direct initial grant-free (GF) uplink (UL) data transmissions. The second TA option indicates indirect initial GF UL data transmissions with the UE initiating TA reference signaling for updating a TA parameter of the UE. The UE performs an initial GF UL data transmission to the base station based on the TA instruction.

公开(公告)号：US10433283B2

公开(公告)日：2019-10-01

申请号：US15006772

申请日：2016-01-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Toufiqul Islam ,  Kelvin Kar Kin Au ,  Liqing Zhang

IPC: H04W4/00 ,  H04W72/04 ,  H04L27/26

Abstract: Systems and apparatus for assigning sub-bands to numerologies are provided. A system bandwidth is divided into bandwidth portions, and the bandwidth portions are used as the unit of assignment for assigning sub-bands to numerologies. Systems and methods are also provided for allocating resource blocks over a bandwidth such as a sub-band. The available bandwidth is divided into sub-band portions, and the bandwidth portions are used as the unit of allocation for allocating resource blocks to user equipment.

公开(公告)号：US10412730B2

公开(公告)日：2019-09-10

申请号：US15452514

申请日：2017-03-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma ,  Keyvan Zarifi

IPC: H04W4/00 ,  H04W72/04 ,  H04W48/00 ,  H04L1/18 ,  H04L5/14 ,  H04W28/06 ,  H04W72/12

Abstract: In one embodiment, a method for adaptive transmission time intervals (TTIs) includes transmitting, by a communications controller to a user equipment (UE), a segment of a first TDD TTI configuration of a first TDD interval and a second TDD TTI configuration of the first TDD interval, where the first TDD TTI configuration has a first pattern, where the second TDD TTI configuration has a second pattern, where the first pattern is different than the second pattern, where the first TDD TTI configuration has a first uplink TTI segment and a first downlink TTI segment. The method also includes transmitting a first plurality of data on a first TTI in the first downlink TTI segment of the first TDD TTI configurations of the first TDD interval and receiving a second plurality of data on the first uplink segment of the first TDD TTI configuration of the first TDD interval.

公开(公告)号：US10404533B2

公开(公告)日：2019-09-03

申请号：US16107181

申请日：2018-08-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Toufiqul Islam ,  Yu Cao ,  Jianglei Ma ,  Hua Xu ,  Amine Maaref ,  Liqing Zhang ,  Kelvin Kar Kin Au

IPC: H04L12/24 ,  H04W72/04 ,  H04W88/08

Abstract: Systems and methods are provided that facilitate multiple switching points within a slot. A slot format indication is conveyed to a user equipment which indicates which symbols within a slot are uplink, downlink or unknown. Some formats feature half-slot switching meaning that a switch from uplink to downlink transmission takes place twice within a slot. Switching on a more frequent basis can deliver improved latency.

公开(公告)号：US20190173599A1

公开(公告)日：2019-06-06

申请号：US16266947

申请日：2019-02-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kelvin Kar Kin Au ,  Liqing Zhang ,  Jianglei Ma

IPC: H04J3/16 ,  H04L5/00 ,  H04W72/00

Abstract: System and method embodiments are disclosed to provide mechanisms wireless communications. A method comprises transmitting, by a network device to a non-long term evolution (LTE) user equipment (UE), a bandwidth partitioning information describing a non-LTE bandwidth partition of a system bandwidth. The system bandwidth comprises an LTE bandwidth partition coexisting with the non-LTE bandwidth partition in the system bandwidth, and the LTE bandwidth partition is within the non-LTE bandwidth partition or the LTE bandwidth partition is adjacent to the non-LTE bandwidth partition.

公开(公告)号：US10313965B2

公开(公告)日：2019-06-04

申请号：US14702234

申请日：2015-05-01

Applicant: Huawei Technologies Co., Ltd

Inventor： Nimal Gamini Senarath ,  Liqing Zhang

IPC: H04W52/02 ,  H04W16/02 ,  H04W72/08

Abstract: The present invention facilitates efficient and effective power management for wireless telecommunications. In one embodiment, presented approaches enable power savings in devices with a limited power supply (e.g., mobile devices operating on battery power supply, photocell, etc.). In one exemplary implementation, power smart channels facilitate power conservation. Power smart channel communications can be transmitted at lower power levels than conventional or normal channel communications. Presented power smart channel methods and systems can be implemented in a wireless cellular communication environment where power smart channels are established and used in accordance with various aspects and configurations of the components (e.g., location, remaining battery charge, multiple resource bands, etc.) in the wireless cellular communication environment.

公开(公告)号：US20190089480A1

公开(公告)日：2019-03-21

申请号：US16194972

申请日：2018-11-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liqing Zhang ,  Kelvin Kar Kin Au ,  Jianglei Ma

IPC: H04L1/00 ,  H04L5/00 ,  H04W74/08

Abstract: Embodiments are provided for a scheme of link adaptation (LA) in uplink grant-less random access (RA) communications. The scheme includes changing a modulation and coding (MCS) of a user, instead of using a fixed MCS over time, as the user link, channel, or non-link conditions vary during the RA communications. In an embodiment, a transmission point (TP) receives from a UE a packet encoded using a MCS, and detects a condition associated with uplink measurements or other non-link based condition of the UE. The TP then initiates an upgrade or a downgrade of the MCS in accordance with the condition, and signals the UE indicating a second MCS as a result. The UE thus sends a second packet encoded using the second MCS. In another embodiment, the UE initiates the MCS change in accordance to detecting a link or non-link based condition, such as change of mobility.