公开(公告)号：US11356903B2

公开(公告)日：2022-06-07

申请号：US16534909

申请日：2019-08-07

Applicant: Google LLC

Inventor： Chih-Hsiang Wu

IPC: H04W36/00 ,  H04W36/08

Abstract: This document describes methods and devices for a handover of a user equipment (110) from source base station (a Fifth Generation (5G) New Radio (NR) base station (121)) to a target base station (another 5G NR base station (123) or an Evolved Packet Core (EPC) network base station (122)). The source base station (121), which is in communication with the user equipment (110), determines to handover the user equipment (110) to the target base station (123,122). The source base station (121), then determines whether to use a delta configuration or a full configuration for handing over the user equipment (110). For the full configuration, the source base station (121) either excludes the delta configuration from, or indicates use of the full configuration in, handover preparation information. By so doing, the source base station (121) enables handover of the user equipment (110) to the target base station (123,122).

公开(公告)号：US20220174748A1

公开(公告)日：2022-06-02

申请号：US17286746

申请日：2020-07-23

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu ,  Kao-Peng Chou

IPC: H04W74/08 ,  H04L1/18 ,  H04L5/00

Abstract: Granting access to a communication channel for several user devices by a base station includes receiving, from at least a first and second user device, at least a first request to access the communication channel and a second request to access the communication channel (1202), the first request including a first random access preamble and a first payload, and the second request including a second random access preamble and a second payload, and transmitting, to at least the first and second user devices, a response message including at least a first control channel resource assignment configuring at least a first control channel resource for the at least the first user device to transmit an acknowledgement of the response message (1208).

公开(公告)号：US20220132624A1

公开(公告)日：2022-04-28

申请号：US17647330

申请日：2022-01-06

Applicant: Google LLC

Inventor： Chih-Hsiang Wu ,  Ching-Jung Hsieh

IPC: H04W76/32 ,  H04W76/27 ,  H04W8/08 ,  H04W36/08 ,  H04W48/20 ,  H04W68/00 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W74/08 ,  H04W76/10

Abstract: This document describes techniques and apparatuses for handling radio resource control (RRC) cell group configuration. In implementations, a base station (120) receives a first radio resource control message that requests a connection procedure between a user equipment (110) and the base station (e.g., 325, 425, 1325), such as a radio resource control resume request or a radio resource setup request. In response to receiving the first radio resource control message, the base station (120) generates a second radio resource control message that includes a cell-group-configuration information element that excludes a reconfiguration-with-sync information element (e.g., 330, 430, 1330). The base station (120) then transmits the second radio resource control message to the user equipment (110) (e.g., 335, 435, 1345). Afterward, the base station (120) receives, from the user equipment (110), a third radio resource control message that indicates the connection procedure is complete (e.g., 340, 440, 1350).

公开(公告)号：US20220110157A1

公开(公告)日：2022-04-07

申请号：US17428458

申请日：2020-02-12

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu

IPC: H04W74/08 ,  H04L27/00

Abstract: A method for reducing transmission delays, implemented in a communication device, includes starting (502) a first timer. An expiration (504) of the first timer corresponds to a desired transmission time for a first message. The method also includes, before the expiration of the first timer, starting (504) a first channel access procedure of one or more channel access procedures, and determining (508), using the one or more channel access procedures, whether a shared carrier is available for transmission after the expiration of the first timer. The method also includes, based on whether the shared carrier is available for transmission after the expiration of the first timer (510), either transmitting (512) or not transmitting (514) the first message to another communication device via the shared carrier.

公开(公告)号：US11223981B2

公开(公告)日：2022-01-11

申请号：US16639023

申请日：2019-08-22

Applicant: Google LLC

Inventor： Chih-Hsiang Wu

IPC: H04W36/00 ,  H04W4/00 ,  H04W36/14 ,  H04W72/04

Abstract: Techniques and apparatuses are described for managing inter-radio access technology capabilities of a user equipment. A base station (gNB base station 121) receives a New Radio capability information element (information element 500) that indicates one or more core networks supported by the user equipment (UE 110). Based on the New Radio capability information element, the base station generates a measurement configuration and sends measurement configuration to the user equipment (at 1010). Afterwards, the base station receives one or more measurement results based on the measurement configuration (at 1030). The base station then determines a handover type for the user equipment (at 1105, at 1205, at 1305), and initiates the handover based on the determined handover type (at 1110, at 1210, at 1310).

公开(公告)号：US20210377848A1

公开(公告)日：2021-12-02

申请号：US17285850

申请日：2019-10-15

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu

IPC: H04W48/18 ,  H04W48/12 ,  H04W76/20

Abstract: A method in a user device that supports an air interface for connecting to core networks (CNs) of different types includes receiving system information from a first base station or a second base station (1102), determining, based on the received system information, at least two CN types of respective CNs to which the first base station is connected (1104), choosing a CN type from among the at least two CN types (1106), and performing a mobility management procedure with a CN of the chosen CN type via the first base station (1108).

公开(公告)号：US20200053812A1

公开(公告)日：2020-02-13

申请号：US16531597

申请日：2019-08-05

Applicant: Google LLC

Inventor： Chih-Hsiang Wu

IPC: H04W76/19 ,  H04W76/27 ,  H04W24/10 ,  H04W76/18 ,  H04W76/30

Abstract: This document describes methods, devices, systems, and means for radio resource control connection reestablishment, in which a user equipment (110) receives a first measurement configuration (405) from a base station (121), and based on the first measurement configuration, the user equipment (110) performs a first measurement process (415). The user equipment (110) detects a first failure (420) with the base station (121) and in response to detecting the first failure with the base station (121), the user equipment (110) maintains the first measurement configuration and suspends performance of the first measurement process.

公开(公告)号：US20250168892A1

公开(公告)日：2025-05-22

申请号：US18839598

申请日：2023-02-22

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu

IPC: H04W74/0833 ,  H04W74/00

Abstract: A user equipment (UE) 102 receives, from a radio access network (RAN) 105, a configuration for uplink transmission to the RAN 105 when a radio connection between the UE 102 and a radio access network (RAN) 105 is suspended (e.g., event 602); detects, at a first time when the radio connection is suspended, that a message for transmitting to the RAN 105 is available (e.g., event 604); and refrains, at the first time in response to determining that an uplink (UE) resource corresponding to the configuration is not available until a second time subsequent to the first time, from transmitting the message to the RAN 105 (e.g., event 608).

公开(公告)号：US20250142664A1

公开(公告)日：2025-05-01

申请号：US18836558

申请日：2023-02-10

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu

IPC: H04W76/27 ,  H04W76/38

Abstract: A method, performed by a DU of a distributed base station that includes the DU and a CU, of managing time alignment includes transmitting a timing advance command to a UE, starting or restarting a first time alignment timer that indicates validity of a configured grant configuration when the UE is in an RRC connected state with a RAN, and, after starting or restarting the first time alignment timer, determining to transition the UE from the RRC connected state to an RRC inactive state. The method also includes, in response to the determining, (i) transitioning the UE from the RRC connected state to the RRC inactive state by transmitting a first message to the UE, (ii) stopping the first time alignment timer, and (iii) starting or restarting a second time alignment timer that indicates validity of a CG-SDT configuration when the UE is in the RRC inactive state.

公开(公告)号：US20250142503A1

公开(公告)日：2025-05-01

申请号：US18836630

申请日：2023-02-10

Applicant: GOOGLE LLC

Inventor： Chih-Hsiang Wu

IPC: H04W56/00 ,  H04W72/1268 ,  H04W76/27

Abstract: A method, performed by a UE, of managing time alignment includes receiving a timing advance command from a RAN, starting or restarting a first time alignment timer that indicates validity of a CG configuration when the UE is in an RRC connected state with the RAN, and then receiving a first message from the RAN. The method also includes, in response to the first message, transitioning from the RRC connected state to an RRC inactive state, stopping the first time alignment timer, and starting or restarting a second time alignment timer that indicates validity of a CG-SDT configuration when the UE is in the RRC inactive state, and then receiving a second message from the RAN. The method also includes, in response transitioning to the RRC connected state, again starting the first time alignment timer, and communicating data with the RAN.