公开(公告)号：US20230224779A1

公开(公告)日：2023-07-13

申请号：US17920470

申请日：2021-04-26

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Junya OKABE ,  Kazuhiro CHIBA ,  Kouji SHIMIZU ,  Tomoki NAKAGAWA ,  Takahiro AOKI

IPC: H04W36/12 ,  H04W76/10

CPC classification number: H04W36/12 ,  H04W76/10

Abstract: A radio terminal (1) determines that the radio terminal (1) is approaching a first station (5), receives from a center server (4) a cell identifier of a first cell corresponding to an entrance gate function (53) of the first station (5), and transmit a message containing the cell identifier to a cellular communication network. The message causes the network to add the first cell (54) as a secondary cell in dual connectivity for the radio terminal (1), enabling the radio terminal (1) to communicate with the entrance gate function (53) via a user plane path including a radio connection of the first cell (54). The radio terminal (1) then communicates with the entrance gate function (53) via the user plane path. This contributes, for example, to reducing latency required to transmit or receive user data in a narrow coverage cell when a radio terminal receives a signal from that cell.

公开(公告)号：US20220264679A1

公开(公告)日：2022-08-18

申请号：US17628306

申请日：2021-04-26

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Junya OKABE ,  Kazuhiro CHIBA ,  Kouji SHIMIZU ,  Tomoki NAKAGAWA ,  Takahiro AOKI

IPC: H04W76/15 ,  H04W76/12 ,  H04W4/021

Abstract: A User Equipment (UE) (3) includes, in a Non-Access Stratum (NAS) message requesting establishment or modification of a protocol data unit (PDU) session, one or both of a first identifier representing a candidate secondary cell (12) for dual connectivity and a second identifier representing a frequency band in which the candidate secondary cell operates. The UE (3) sends the NAS message to a core network (30) via a radio access network (10). This can, for example, allow a radio communication network to provide a UE with a user plane path that includes a radio connection in a specific secondary cell of dual connectivity based on a request from the UE or an application function.

公开(公告)号：US20220295363A1

公开(公告)日：2022-09-15

申请号：US17628302

申请日：2021-04-26

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Junya OKABE ,  Kazuhiro CHIBA ,  Kouji SHIMIZU ,  Tomoki NAKAGAWA ,  Takahiro AOKI

IPC: H04W36/00 ,  H04L12/14

Abstract: A Policy Control Function (PCF) apparatus (34) receives information from a Network Exposure Function (NEF) apparatus (35) or an Application Function (AF) apparatus (41) and modifies based on the information a policy including an Index to RAT/Frequency Selection Priority (RFSP index). This can, for example, contribute to enabling a radio communication network to provide a User Equipment (UE) with a user plane path containing a radio connection in a specific cell based on a request from an AF.