Nec Corporation

Mitsubishi Heavy Industries Limited

Daisuke Ogura

Sadafuku Hayashi

Atsushi Sugai

Hisashi Futaki

Ken Ishii

Atsushi Nakata

Takahiro Ota

Yuichi Kaneda

Yu Matsunaga

Shoichi Morimoto

Minoru Arima

Akihiko Egami

In an architecture in which the inside of a radio access network is split into two layers and the processes are performed in separate apparatuses, respectively, to achieve the redundancy of the processes of the higher layer. A server apparatusis a communication apparatus that comprises a first layer processing unitconfigured to perform a process of a first layer in a radio access network, an establishing unitconfigured to perform a process for establishing connections with two or more clients performing a process of a second layer, which is higher than the first layer, an obtaining unitconfigured to obtain information related to a connection state with a first client performing the process of the second layer, and a communication processing unitconfigured to transmit, to a second client, the information related to the connection state with the first client.

Communication apparatus, method, program and recording medium

In order to allow for improvement on a case where data of a cellular network is transmitted and/or received through a wireless local area network (WLAN), a base station of the present invention includes: a first communication processing unit configured to add a header of a framing protocol to downlink data transmitted to a terminal apparatus; and a second communication processing unit configured to transmit the downlink data to which the header is added to a gateway that is used for transmission from the base station to the terminal apparatus through a wireless local area network. The framing protocol is a protocol for communication between the base station and the gateway and the header includes identification information corresponding to quality of service for the downlink data.

Adding framing protocol header to downlink data

In order to enable, even when there exist a plurality of apparatuses configured to perform processing of an upper layer of the transport layer for one apparatus configured to perform processing of the transport layer or a lower layer, reliable communication with each of the apparatuses configured to perform the processing of the upper layer, via the transport layer, an apparatus includes a generating sectionconfigured to generate a transport layer packet including identification information in a packet region different from a service data unit, the identification information being used in an upper layer of a transport layer, and a transmission processing sectionconfigured to transmit the transport layer packet.

Communication apparatus, method, program, and recording medium

A network apparatus () incorporates edge computing related control information () into a header part () of a protocol data unit of an encapsulation protocol that is used to encapsulate a user packet originated from or destined for a radio terminal. Further, the network apparatus () transmits the protocol data unit whose header part () contains the edge computing related control information ().

Network apparatus and method therefor

In radio access network (RAN)of the present invention, the configuration of radio network controller (RNC)is physically separated into control plane controllers (CPE)-for controlling signalling and user plane controllers (UPE)-for controlling user data. User plane controllers-report their own status information (traffic information/used channel bandwidth information/alarm information) to control plane controllers to which they belong, and control plane controllers-manage the status information of the user plane controllers for each of user plane controllers subordinate thereto.

Radio access network control method and radio access network

To enable delivery confirmation for data transmitted from a base station to a terminal apparatus via the access point. An apparatus according to an example aspect of the present invention includes an information acquisition unit configured to acquire a data unit from a packet data convergence protocol (PDCP) layer of a base station, and a communication processing unit configured to transmit the data unit to a terminal apparatus via an access point of a wireless local area network using a protocol enabling delivery confirmation.

Apparatus and method for radio communication

A communication system according to the present invention includes a PDCP control base station () configured to execute a process in a PDCP layer, and an RLC control base station () configured to execute a process in an RLC layer on data transmitted by the PDCP control base station () and transmit the data on which the process in the RLC layer has been executed to a mobile station (). The RLC control base station () transmits a response message to the PDCP control base station () when the data has been successfully transmitted to the mobile station (). When the PDCP control base station () receives the response message, the PDCP control base station () transmits data to be transmitted next to the RLC control base station ().

Communication system, base station, communication method, and non-transitory computer readable medium storing program

In order to accommodate expansion of a mobile network and detailed QoS control, a transmission VXLAN header is generated by setting a logical group to which an input packet belongs as a logical network number in the VNI field of a VXLAN header and setting QoS information as traffic control information in a predefined, predetermined field. The generated transmission VXLAN header is added to the input packet, which is then output as a VXLAN header-added output packet to a mobile backhaul. When a VXLAN header-added input packet is input from the mobile backhaul, the received VXLAN header that was added is removed, and the logical network number that is set in the VNI field of the received VXLAN header and the traffic control information that is set in the predefined, predetermined field are extracted. Traffic control is performed on the basis of the extracted logical network number and traffic control information, and the packet is output as an output packet.

Communication device and traffic control method

In order to more quickly detect a failure in a radio base station and complement the coverage thereof, a first base station included in a communication system forms a first cell to conduct radio communication with one or more mobile stations. A second base station, which is placed adjacent to the first base station, forms a second cell to conduct radio communication with one or more mobile stations. The first base station conducts communication with the second base station to monitor whether or not a failure occurs in the second base station. When it is detected as a result of the monitoring that the failure occurs in the second base station, the first base station expands coverage of the first cell so as to complement that of the second cell.

Base station, communication system, and control method for base station

In one embodiment, a mobile terminaI () includes a wireless communication network () capable of connecting to a mobile communication network (), a packet processing unit (), and a control unit (). The packet processlng unit () transmits or receives a user packet through the wireless communication unit (). The control unit () transmits, to the mobile communication network (), a message indicating whether or not to permit setting a congestion indication marking to an Explicit Congestion Notification (ECN)-enabled user packet in the mobile communication network ().

Mobile terminal, control node, packet transfer node, and method for controlling congestion

A plate-shaped workpiece forming method of post-machining a pocket () on a curved inner surface of a plate-shaped workpiece () in a state where the plate-shaped workpiece () curved by a curving machine () is spread flat. The method includes a curving step (A) of setting a net curve radius (R) obtained by adding a curve radius contraction amount (R) due to spring-in to a finished curve radius (R) of a plate-shaped workpiece (), taking into account an amount of contraction of the curve radius of the plate-shaped workpiece () between before and after machining of a pocket () due to spring-in, and curving the plate-shaped workpiece () so as to achieve the net curve radius (R); and a pocket machining step of post-machining the pocket () by flatly spreading the curved plate-shaped workpiece ().

Plate-shaped workpiece forming method

Provided is a molding method for a plate-shaped workpiece including forming a concave portion () at one surface () of a plate-shaped workpiece (), and bending the plate-shaped workpiece () having the concave portion () such that the one surface () becomes a concave surface and a rear surface () thereof becomes a convex surface.

Molding method for plate-shaped workpiece, and molded article

In a wireless base station device, a PDCP buffer unit temporarily stores data sent from a core network device for the purpose of sending the data to a mobile station device. A data measurement unit measures the volume of data stored in a PDCP buffer unit. On the basis of a measurement value of the data volume measured by the data measurement unit, the congestion state determination unit determines whether or not the PDCP buffer unit is in a congestion state. In the core network device, a sending data storage unit stores data to be sent to the wireless base station device. On the basis of a result of the determination by the congestion state determination unit, a transmission/reception unit sends the data stored in the sending data storage unit to the wireless base station device. In this way, loss of data communicated between the communication devices is reduced.

Communication system and base station device

A communication apparatus and a communication control method are provided that can transmit a high-priority stream and interrupt a transmission of a low-priority stream when a network is busy, and control the transmissions of streams for each stream. The communication apparatus determines whether or not a congestion degree of communication with a communication destination apparatus has exceeded a predetermined determination value, transmits a plurality of streams to the communication destination apparatus in parallel under a situation in which the congestion degree does not exceed the determination value, and thereafter interrupts at least a transmission of a stream having priority lower than other streams among the plurality of streams transmitted in parallel if the congestion degree exceeds the determination value, the priority of each stream being indicated by priority information.

Growing community of inventors

Tokyo, Japan

Daisuke Ogura