公开(公告)号：US20200014548A1

公开(公告)日：2020-01-09

申请号：US16518805

申请日：2019-07-22

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04L12/14 ,  H04B7/155 ,  H04W4/24 ,  H04W4/70 ,  H04M15/00

Abstract: In order for charging SDT and MTC device trigger over control plane, there is provided a network node (40) that relays messages over a control plane (T5 and Tsp) between an MTC device (10) and an SCS (50). The network node (40) counts the number of messages successfully relayed, and generates a CDR in accordance with the counted number. The messages are SDT messages delivered from the MTC device (10) to the SCS (50), SDT messages delivered from the SCS (50) to the MTC device (10), or MTC device trigger messages delivered from the SCS (50) to the MTC device (10). The network node (40) transfers the CDR to an OCF (31) or a CDF (32).

公开(公告)号：US20190394715A1

公开(公告)日：2019-12-26

申请号：US16481275

申请日：2018-01-26

Applicant: NEC Corporation

Inventor： Anand Raghawa PRASAD ,  Sivakamy Raghawa LAKSHMINARAYANAN ,  Sivabalan ARUMUGAM ,  Hironori ITO ,  Andreas KUNZ

IPC: H04W48/16 ,  H04W36/14 ,  H04W36/32

Abstract: An object is to provide a communication terminal capable of using a newly-generated network slice or service. A communication terminal (10) according to the present disclosure includes a communication unit (11) configured to receive a parameter related to SM-NSSAI (Session Management-Network Slice Selection Assistance Information) from a core network When subscriber information of the communication terminal itself managed in the core network or a location of the communication terminal itself is changed, and a control unit (12) configured to update NSSAI by using the parameter related to the SM-NSSAI, the NSSAI being managed to select a network slice.

公开(公告)号：US20190110195A1

公开(公告)日：2019-04-11

申请号：US16095572

申请日：2017-04-18

Applicant: NEC Corporation

Inventor： Hironori ITO ,  Anand Raghawa PRASAD ,  Naoaki SUZUKI ,  Andreas KUNZ

IPC: H04W12/04 ,  H04W12/10 ,  H04L9/08 ,  H04L9/14 ,  H04L29/06

Abstract: An object is to provide a key generation method capable of maintaining a high security level in each of sliced networks when network slicing is applied to a core network. A key generation method according to this disclosure specifies network slice identification information indicating a network slice system that provides a service to be used by a communication terminal (50) among a plurality of network slice systems included in a core network (10) and, using the network slice identification information, generates a service key to be used for security processing in the network slice system indicated by the network slice identification information.

公开(公告)号：US20190069204A1

公开(公告)日：2019-02-28

申请号：US16146694

申请日：2018-09-28

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04W36/00 ,  H04W36/22 ,  H04W12/06 ,  H04W12/04 ,  H04W8/30 ,  H04W8/12 ,  H04L29/06

Abstract: There is provided a network system including one or more first MMEs (30), and a second MME (40) separated from the first MMEs (30). In one of operation cases, the first MME (30) pushes, to the second MME (40), security context for a UE (10) that attaches to the first MME (30). The second MME (40) stores the security context. The first MME (30) further pushes the latest security context to the second MME (40), during a switch-off procedure for the first MME (30). The second MME (40) updates the stored security context with the latest security context. The first MME (30) pulls the security context from the second MME (40), when the UE (10) re-attaches to the first MME (30) or is handovered from different one of the first MMEs (30).

公开(公告)号：US20190037486A1

公开(公告)日：2019-01-31

申请号：US16152214

申请日：2018-10-04

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Toshiyuki TAMURA ,  Anand Raghawa PRASAD

IPC: H04W48/18 ,  H04W8/20 ,  H04W8/04 ,  H04W12/06 ,  H04W8/18 ,  H04W60/00

Abstract: In order for more effectively supporting a Dedicated Core Network, there is provided a network system including a first node (30) that establishes secure connection with a UE (10) initially attempting to attach to a network, through a radio base station (20), and a second node (40) to which the UE (10) is redirected from the first node (30) through the radio base station (20). Upon the redirection, the first node (30) sends information on the first node (30) itself to the second node (40) through the radio base station (20). The second node (40) uses the information to retrieve security context necessary for establishing the connection with the UE (10) from the first node (30).

公开(公告)号：US20180152432A1

公开(公告)日：2018-05-31

申请号：US15829127

申请日：2017-12-01

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04L29/06 ,  H04W4/70 ,  H04W12/06 ,  H04W12/08 ,  H04W12/10 ,  H04W68/00

CPC classification number: H04L63/08 ,  H04L63/0876 ,  H04L63/101 ,  H04L63/12 ,  H04L63/123 ,  H04L63/1416 ,  H04L63/20 ,  H04L63/205 ,  H04W4/70 ,  H04W12/06 ,  H04W12/08 ,  H04W12/10 ,  H04W68/00

Abstract: Upon receiving a triggering message from a MTC server (20), a network (10) verifies if the MTC server (20) is authorized to trigger a target MTC device (30) and also if the MTC device (30) is authorized to respond the triggering message, by comparing an MTC device ID and MTC server ID (and optionally information on subscription) which are include in the triggering message with authorized ones. Upon succeeding in the verification, the network (10) checks a trigger type included in the triggering message to verify if the triggering message is authorized to be sent to the MTC device (30). Upon succeeding in the check, the network (10) forwards the triggering message to the MTC device (30). The network (10) also validates a response from the MTC device (30), by checking whether the MTC device (30) is allowed to communicate with the addressed MTC server (20).

公开(公告)号：US20180041926A1

公开(公告)日：2018-02-08

申请号：US15549269

申请日：2016-02-02

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04W36/00 ,  H04W36/22 ,  H04W12/04 ,  H04W8/12

CPC classification number: H04W36/0038 ,  H04L63/083 ,  H04W8/12 ,  H04W8/30 ,  H04W12/04 ,  H04W12/06 ,  H04W36/22

Abstract: There is provided a network system including one or more first MMEs (30), and a second MME (40) separated from the first MMEs (30). In one of operation cases, the first MME (30) pushes, to the second MME (40), security context for a UE (10) that attaches to the first MME (30). The second MME (40) stores the security context. The first MME (30) further pushes the latest security context to the second MME (40), during a switch-off procedure for the first MME (30). The second MME (40) updates the stored security context with the latest security context. The first MME (30) pulls the security context from the second MME (40), when the UE (10) re-attaches to the first MME (30) or is handovered from different one of the first MMEs (30).

公开(公告)号：US20170359322A1

公开(公告)日：2017-12-14

申请号：US15667900

申请日：2017-08-03

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04L29/06 ,  H04W12/02 ,  H04L9/32 ,  H04L9/08 ,  H04W12/10 ,  H04W4/00 ,  H04W76/02

Abstract: A method of performing authentication and authorization in Proximity based Service (ProSe) communication by a requesting device (31) which sends a request of a communication and a receiving device (32) which receives the request from the requesting device (31) and (32), the method including deriving session keys Kpc and Kpi from an unique key Kp at the requesting and receiving devices (31) and (32), using the session keys Kpc and Kpi for ProSe communication setup and direct communication between the requesting and receiving devices (31) and (32), starting the direct communication with the requesting and receiving devices (31) and (32). The key Kpc is confidentiality key and the key Kpi is integrity protection key.

公开(公告)号：US20170324754A1

公开(公告)日：2017-11-09

申请号：US15655179

申请日：2017-07-20

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04L29/06 ,  H04L29/08 ,  H04W12/08 ,  H04W4/00

Abstract: A method of forming a secure group in ProSe communication includes requesting a service request to a ProSe server from a requesting device (21), the service request indicating a request to communicate with a receiving device (22) from the requesting device (21), performing verification on the requesting and receiving devices (21) and (22) by the ProSe server 24, sending a ProSe Service Result to the requesting and receiving devices (21) and (22) to inform to be allowed a group member, and starting a group security establishment of the group including the requesting and receiving devices (21) and (22)

公开(公告)号：US20170195305A1

公开(公告)日：2017-07-06

申请号：US15375032

申请日：2016-12-09

Applicant: NEC Corporation

Inventor： Xiaowei ZHANG ,  Anand Raghawa PRASAD

IPC: H04L29/06 ,  H04W12/06

CPC classification number: H04L63/08 ,  H04L63/0876 ,  H04L63/101 ,  H04L63/12 ,  H04L63/123 ,  H04L63/1416 ,  H04L63/20 ,  H04L63/205 ,  H04W4/70 ,  H04W12/06 ,  H04W12/08 ,  H04W12/10 ,  H04W68/00

Abstract: Upon receiving a triggering message from a MTC server (20), a network (10) verifies if the MTC server (20) is authorized to trigger a target MTC device (30) and also if the MTC device (30) is authorized to respond the triggering message, by comparing an MTC device ID and MTC server ID (and optionally information on subscription) which are include in the triggering message with authorized ones. Upon succeeding in the verification, the network (10) checks a trigger type included in the triggering message to verify if the triggering message is authorized to be sent to the MTC device (30). Upon succeeding in the check, the network (10) forwards the triggering message to the MTC device (30). The network (10) also validates a response from the MTC device (30), by checking whether the MTC device (30) is allowed to communicate with the addressed MTC server (20).