公开(公告)号：US10595243B2

公开(公告)日：2020-03-17

申请号：US15322042

申请日：2015-07-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04W36/28 ,  H04W36/00 ,  H04W36/08 ,  H04W76/11 ,  H04W36/18 ,  H04W36/38 ,  H04W76/15

Abstract: An embodiment of the present disclosure may provide an inter-MeNB handover method in a small cell system, including: making, by a source MeNB and/or target MeNB, a determination as to whether to maintain a SeNB when handover is performed; and triggering different handover processes according to a result of the determination as to whether to maintain the SeNB. Another embodiment of the present disclosure may further provide an inter-MeNB handover device in a small cell system. With the inter-MeNB handover method and device in a small cell system provided by the present disclosure, unnecessary deletion and re-establishment of the bearers at the SeNB for the UE may be reduced. False bearer deletion may be avoided and data forwarding may be reduced. Furthermore, the SeNB may be maintained according to network deployment and SGW re-selection may be supported. Therefore, system capacity and transmission speed of the data may be improved.

公开(公告)号：US10517135B2

公开(公告)日：2019-12-24

申请号：US16214815

申请日：2018-12-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04W36/00 ,  H04W76/25 ,  H04W76/18 ,  H04W36/32 ,  H04W36/24

Abstract: A method for transmitting a handover report and for transmitting a radio link failure (RLF) report are provided. The method includes obtaining, by a target base station, at least one of location information of a source cell or location information of a user equipment (UE) history cell during a handover procedure, and transmitting, by the target base station, the handover report to at least one of a source base station or to a base station where the UE history cell is located, according to the obtained at least one of location information of the source cell or the location information of the UE history cell, wherein the handover report including at least one of an unnecessary handover report, a too early handover report, or a handover to wrong cell report.

公开(公告)号：US10455489B2

公开(公告)日：2019-10-22

申请号：US15277466

申请日：2016-09-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Huarui Liang ,  Hong Wang ,  Lixiang Xu ,  Xiaoqiang Li

IPC: H04W48/00 ,  H04W48/02 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W76/16 ,  H04W76/11 ,  H04W8/08 ,  H04L29/12 ,  H04W80/04 ,  H04W84/04

Abstract: A method for supporting packet data network (PDN) gateway (GW) selection, comprising the following steps of: receiving by a mobility management entity (MME) a local route optimization service request information; searching by the MME the internet protocol (IP) address of a PDN GW which supports local route optimization according to the IP address of a PDN GW on home evolved node B (HeNB) (PDN GWh); sending by the MME a bearer request establishment message to the PDN GWh. The method of the present invention can ensure core network equipment to find PDN GW correctly while HeNB system supports local route optimization.

公开(公告)号：US10433165B2

公开(公告)日：2019-10-01

申请号：US15923767

申请日：2018-03-16

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hong Wang ,  Huarui Liang ,  Lixiang Xu

IPC: H04W4/00 ,  H04W12/04 ,  H04W72/04

Abstract: The present application discloses a method for configuring and transmitting a key, which includes that: a) a serving cell (PCell) of UE determines a key (KeNB) used by a SCell and transmits the KeNB to the SCell; and b) the PCell transmits configuration information for configuring the SCell to the UE after receiving a response message from the SCell, and receives a response message from the UE. Or, the method includes that: a SCell of UE transmits a cell key request to a MME and receives key information from the MME; and the SCell transmits the key information received from the MME to the UE, and receives a response message from the UE. By the present application, data of the SCell is transmitted after being encrypted, so as to avoid a case that the data is decoded by other users, and further guarantee the security of the data.

公开(公告)号：US10264495B2

公开(公告)日：2019-04-16

申请号：US15232079

申请日：2016-08-09

Applicant: Samsung Electronics Co., Ltd.

Inventor： Xiaowan Ke ,  Lixiang Xu ,  Hong Wang

IPC: H04W36/00 ,  H04W28/02 ,  H04W84/12 ,  H04W84/04

Abstract: A method for controlling a wireless local area network (WLAN) bearer is provided. The method includes a base station receives information including at least one of WLAN information of a WLAN node, WLAN aggregation response information, WLAN aggregation update response information, WLAN aggregation update information and a WLAN capability of UE. According to the received information, the base station instructs the UE to perform traffic steering between an E-UTRAN and the WLAN, or instructs the UE to perform control processing for the EUTRAN and WLAN aggregation. By using the present disclosure, efficiency of WLAN bearer control is improved.

公开(公告)号：US10136365B2

公开(公告)日：2018-11-20

申请号：US14140253

申请日：2013-12-24

Applicant: Samsung Electronics Co., Ltd

Inventor： Lixiang Xu ,  Hong Wang ,  Huarui Liang

IPC: H04W36/00 ,  H04W84/04 ,  H04W76/19

Abstract: A method for supporting fast recovery of a User Equipment (UE) includes performing, by a serving base station, UE context synchronization for one or more other base stations in a related small cell cluster when a UE accesses the serving base station, performing, by a base station that the UE performs a radio resource control (RRC) connection re-establishment, the RRC connection re-establishment for the UE according to UE context saved in a synchronization process. The present also discloses another method and system for supporting UE fast recovery. By applying the technical solution disclosed by the present disclosure, when the UE moves in a small cell scenario, the UE can be recovered quickly in the case of a failure, so as to avoid the UE returns to an idle mode, avoid data loss, guarantee business continuity, and improve UE experience.

公开(公告)号：US09867224B2

公开(公告)日：2018-01-09

申请号：US14698212

申请日：2015-04-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04W36/00 ,  H04W76/02

CPC classification number: H04W76/25 ,  H04W36/0055 ,  H04W36/0083 ,  H04W36/245 ,  H04W36/32 ,  H04W76/18

Abstract: A method for transmitting a handover report and for transmitting a radio link failure (RLF) report are provided. The method includes obtaining, by a target base station, at least one of location information of a source cell or location information of a user equipment (UE) history cell during a handover procedure, and transmitting, by the target base station, the handover report to at least one of a source base station or to a base station where the UE history cell is located, according to the obtained at least one of location information of the source cell or the location information of the UE history cell, wherein the handover report including at least one of an unnecessary handover report, a too early handover report, or a handover to wrong cell report.

公开(公告)号：US09848323B2

公开(公告)日：2017-12-19

申请号：US14907531

申请日：2014-07-25

Applicant: Samsung Electronics Co., Ltd

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04L9/08 ,  H04W12/04 ,  H04W72/04 ,  H04W36/00 ,  H04W84/04 ,  H04L29/06

CPC classification number: H04W12/04 ,  G06F2201/875 ,  H04L63/205 ,  H04W36/0005 ,  H04W36/0038 ,  H04W72/042 ,  H04W84/045

Abstract: This application discloses a method of using NH and NCC pairs to resolve security issues. It includes: an MME sends a sequence including multiple NH and NCC pairs to S1GW that is calculated to correspond to a UE. After the S1GW receives a UE handover message or a UE bearer switch message from a base station, the S1GW may choose a next unused NH and NCC pair from the sequence sent by the MME and send it to a target base station. In using this application, part of the bearer switch of the UE or the switch of the UE can be terminated at the S1GW or HeNB GW, which reduces impact on the core network and cuts down on the use of system resources.

公开(公告)号：US09838936B2

公开(公告)日：2017-12-05

申请号：US14878705

申请日：2015-10-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hong Wang ,  Lixiang Xu ,  Xiaowan Ke

IPC: H04W4/00 ,  H04W36/28 ,  H04W76/02 ,  H04W28/02 ,  H04B7/155 ,  H04W36/02 ,  H04L12/935 ,  H04W72/04 ,  H04L29/06 ,  H04W72/12 ,  H04W28/08 ,  H04W88/08 ,  H04W92/20

CPC classification number: H04W36/28 ,  H04B7/155 ,  H04L49/3072 ,  H04L69/22 ,  H04W28/0278 ,  H04W28/08 ,  H04W36/023 ,  H04W72/0413 ,  H04W72/044 ,  H04W72/1252 ,  H04W72/1278 ,  H04W76/11 ,  H04W76/12 ,  H04W76/15 ,  H04W88/08 ,  H04W92/20

Abstract: A method and an apparatus for assigning data to split bearers in dual connectivity is provided. The apparatus includes a master evolved Node B (MeNB) of a user equipment (UE) configured to receive information of available buffer decided and transmitted by a secondary eNB (SeNB) through an X2 interface between the MeNB and the SeNB, determine whether the information is about available buffer for a UE or for an evolved radio access bearer (E-RAB) established on the SeNB based on an indicator in the information or a bearer that transported the information, and adjust the amount of data assigned to the SeNB according to the information of the available buffer. The apparatus can accommodate eNBs implemented in various manners, make full use of the bandwidth of data bearers, and reduce delay in data transmission.

公开(公告)号：US09826450B2

公开(公告)日：2017-11-21

申请号：US14244835

申请日：2014-04-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04W36/00 ,  H04W36/12 ,  H04W76/06

CPC classification number: H04W36/12 ,  H04W36/0061 ,  H04W76/32

Abstract: The present application discloses a method for supporting a selected IP traffic offload (SIPTO) by a mobility management entity (MME) when a user equipment (UE) handovers from a source base station to a target base station in a mobile communication system. The method includes acquiring a local home network identifier (ID) of the source base station, acquiring a local home network ID of the target base station from the target base station, and determining whether the UE has moved out of the local home network of the source base station according to the local home network ID of the source base station and the local home network ID of the target base station.