公开(公告)号：US11051217B2

公开(公告)日：2021-06-29

申请号：US15545997

申请日：2016-01-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Hong Wang ,  Xiaowan Ke

IPC: H04W36/00 ,  H04W76/10 ,  H04W76/30 ,  H04W76/34 ,  H04W36/12 ,  H04W36/08

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides a method of de-activating a local internet protocol access (LIPA) bearer supporting local breakout in a dual-connectivity architecture. When a master eNodeB (MeNB) determines to change a secondary eNodeB (SeNB) serving a user equipment (UE) or hand the UE over from the MeNB to an eNB, the MeNB may trigger a LIPA bearer de-activation process, and then trigger the process of change the SeNB serving the UE or hand the UE over from the MeNB to the eNB. Various examples also provide another method and an apparatus for de-activating a LIPA bearer, for bearer switch, for establishing a LIPA bearer. The methods and apparatus can establish, switch and correctly release local breakout bearer in a dual-connectivity architecture, so as to reduce the load of a core network of an operator.

公开(公告)号：US11006472B2

公开(公告)日：2021-05-11

申请号：US16726127

申请日：2019-12-23

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Hong Wang

IPC: H04W76/15 ,  H04W36/00 ,  H04W36/38 ,  H04W72/04 ,  H04W76/11 ,  H04W28/18

Abstract: A method for data forwarding in a small cell system comprises: sending by a master base station (MeNB) to a target secondary base station (SeNB) information of a source SeNB or a source SeNB cell where a user equipment (UE) is located; determining by the target SeNB whether a direct data forwarding is feasible; notifying, by the target SeNB, the MeNB whether the direct data forwarding is feasible; and determining by the MeNB whether it is a direct data forwarding or an indirect data forwarding. The method for data forwarding provided in the present application may support both the direct data forwarding and the indirect data forwarding based on actual situation of the network, reduce data loss and failure of data forwarding, and improve the efficiency of data forwarding.

公开(公告)号：US10993106B2

公开(公告)日：2021-04-27

申请号：US16587928

申请日：2019-09-30

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hong Wang ,  Lixiang Xu ,  Xiaowan Ke

IPC: H04W8/26 ,  H04W76/20 ,  H04W76/12 ,  H04W74/00 ,  H04W74/08 ,  H04W76/22 ,  H04W76/11 ,  H04W76/27 ,  H04W24/10 ,  H04W80/02 ,  H04W80/08

Abstract: Disclosed is a method for access of a user equipment (UE) in a communication system, which includes the UE, a base station, and a network node. The base station carries out radio link control (RLC) layer and media access control (MAC) layer functions. The network node carries out packet data convergence protocol (PDCP) layer, radio resource control (RRC) layer, and non-access (NAS) layer functions. The method includes the network node receiving a non-access stratum identifier of the UE or a random number generated by the UE sent from the UE through a RRC message, and the network node sending the received non-access stratum identifier or the random number to the base station, for the base station to set a UE collision dismiss identifier.

公开(公告)号：US10979941B2

公开(公告)日：2021-04-13

申请号：US16712380

申请日：2019-12-12

Applicant: Samsung Electronics Co., Ltd.

Inventor： Weiwei Wang ,  Xiaowan Ke ,  Hong Wang ,  Lixiang Xu

IPC: H04W36/00 ,  H04W36/08 ,  H04W76/27

Abstract: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure provides a method and device for switching a serving cell.

公开(公告)号：US10912143B2

公开(公告)日：2021-02-02

申请号：US16699366

申请日：2019-11-29

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：US10904809B2

公开(公告)日：2021-01-26

申请号：US15764513

申请日：2016-09-30

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Hong Wang ,  Xiaowan Ke

IPC: H04W36/08 ,  H04W36/00 ,  H04L5/00 ,  H04W76/32 ,  H04W76/30 ,  H04W36/22 ,  H04W8/08 ,  H04W76/34 ,  H04W88/08 ,  H04W88/16

Abstract: The present disclosure discloses a method for supporting release of a SIPTO bearer or a LIPA bearer in dual-connectivity architecture. The method is implemented as follows. A MeNB sends a message to a SeNB. The message contains indication information for SIPTO at local network bearer deactivation or LIPA bearer deactivation. The indication information may indicate the SeNB to notify a collocated LGW of releasing PDN connection of SIPTO at local network or the PDN connection of LIPA. After receiving the message, the SeNB removes radio and control plane related resources associated to the UE context or the SIPTO at local network bearer or the LIPA bearer, and if the message contains the indication information for SIPTO@LN bearer deactivation or LIPA bearer deactivation, sends an internal signaling to the collocated LGW to indicate the collocated LGW to release the PDN connection of the SIPTO at local network or the PDN connection of the LIPA. The SeNB is a SeNB supporting functions of the LGW that supports operations of the SIPTO at local network or the operations of the LIPA. By the method of the present disclosure, the SIPTO bearer or the LIPA bearer in the dual-connectivity architecture can be released, thereby avoiding inaccurate operations in an access network, ensuring that the SIPTO bearer or the LIPA bearer can be released duly and accurately, and avoiding inaccurate release of the SIPTO bearer or the LIPA bearer.

公开(公告)号：US10708840B2

公开(公告)日：2020-07-07

申请号：US16091417

申请日：2017-04-06

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Xiaowan Ke ,  Hong Wang

IPC: H04W36/30 ,  H04W36/00 ,  H04W76/19 ,  H04W36/08 ,  H04W76/20

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to an embodiment of the present disclosure, a circuit switched fallback (CSFB) method is provided. The method comprising: receiving, by a first base station, a user equipment (UE) context modification request message from a mobility management entity (MME), wherein the UE context modification request message includes a CSFB indicator; receiving, by the first base station, a radio link failure (RLF) indication message from a second base station; and determining, by the first base station, whether to trigger a handover procedure.

公开(公告)号：US10667182B2

公开(公告)日：2020-05-26

申请号：US16694964

申请日：2019-11-25

Applicant: Samsung Electronics Co., Ltd

Inventor： Lixiang Xu ,  Hong Wang ,  Huarui Liang

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

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：US10609678B2

公开(公告)日：2020-03-31

申请号：US16301412

申请日：2017-05-15

Applicant: Samsung Electronics Co., Ltd

Inventor： Xiaowan Ke ,  Hong Wang ,  Lixiang Xu

IPC: H04W68/02 ,  H04W76/10 ,  H04W68/00 ,  H04W76/25 ,  H04W76/28 ,  H04W76/19

Abstract: The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services.The present application provides a method for light connection control for a User Equipment (UE), comprising the following steps of: acquiring, by a first radio access network node, light connection information for a UE; storing, by the first radio access network node, the acquired light connection Information; and, performing, by the first radio access network node, light connection control of the UE based on the acquired light connection information for the UE. By adopting the technical scheme disclosed in the present application, the signaling overhead can be saved, and the delay of the UE access network can be reduced.

公开(公告)号：US10609603B2

公开(公告)日：2020-03-31

申请号：US16284679

申请日：2019-02-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lixiang Xu ,  Hong Wang ,  Huarui Liang

IPC: H04W36/00 ,  H04W24/02 ,  H04W36/14

Abstract: A method for supporting indication of a failure event to a source access system is provided. The method includes notifying, by the source access system, information of a source cell to a target access system, routing, by the target access system, a message to the base station or the base station controller of the source access through a core network by use of the information of the source cell received from the source access system when the target access system needs to transmit a message to the source access system. By use of the method provided by the present disclosure, a problem of mobility robustness optimization (MRO) among different radio access technology (RAT) may be notified to the source access system, so as to avoid impact for a terminal, reduce operator configuration.