Nec Corporation

Nec C Orporation

Takamichi Inoue

Hisashi Futaki

Kojiro Hamabe

Yoshikazu Kakura

Le Liu

Kenji Koyanagi

Naoto Ishii

Shousei Yoshida

Yoshinori Watanabe

Hiroto Sugahara

Kosei Kobayashi

Takahiro Nobukiyo

Toru Osuga

Daisuke Ohta

Kousuke Nogami

Shinichi Anami

Yoshikazu Kakwa

Le Lui

The server device according to the present disclosure includes: a communication unit () that receives, from a plurality of sensor devices that have collected a packet being transmitted from a first wireless terminal, sensor information in which area identification information for identifying an area in which the sensor device is installed is assigned to wireless quality information determined based on the packet, the wireless quality information indicating wireless quality, in a predetermined period, of the area; a selection unit () that selects first area identification information from a plurality of pieces of area identification information, based on the wireless quality information, when a received plurality of pieces of the sensor information include a plurality of pieces of the area identification information; and a display unit () that displays information related to the wireless quality information in the area indicated by the first area identification information.

Server device, sensor device, visualization system, data display method, and non-transitory computer-readable medium

An object is to provide a server device capable of performing analysis on a terminal device applying redundancy to a communication path and simultaneously communicating with a plurality of access points. A server device () according to the present disclosure includes: a communication unit () receiving, from a sensor device that collects packets transferred between a wireless terminal and a first access point/a second access point, sensor information generated based on collected packets; a management unit () managing the first access point and the second access point in association with the wireless terminal when the wireless terminal communicates with the first access point and the second access point by applying redundancy to the communication path; and an analysis unit () generating information on a communication state of redundant communication paths by using sensor information regarding the first access point and the second access point.

Server device, monitoring method, and non- transitory computer-readable medium

To solve a problem that although the increase of the number of frequency blocks by allocating discontinuous subcarriers (RBs) as in OFDM enables an increase in multi-diversity effect and an improvement in throughput, the number of RB allocation patterns increases with the increase of the number of frequency blocks, resulting in an increase in the amount of information relating to the allocated RBs, the resource block allocation unit is determined when resource blocks discontinuous on the frequency axis are allocated to a terminal, and the number of bits of scheduling information indicating the allocated resource blocks by using Tree Based is set to the number of bits corresponding to the determined allocation unit.

Resource allocation method, identification method, radio communication system, base station, mobile station, and program

The wireless communication quality visualization deviceincludes condition setting meanswhich sets measurement condition that can identify a target whose communication quality is measured, and extraction condition that can identify data to be displayed in data on communication quality collected according to the measurement condition, and display data generation meanswhich generates display data for displaying spatial and temporal communication quality based on the data extracted according to the extraction condition.

Wireless communication quality visualization system, wireless communication quality visualization device, and measurement apparatus

A base station includes a transmitter configured to transmit a downlink control information to a user equipment, the downlink control information being generated based on one of (1) a first uplink allocation information indicating a first frequency block corresponding to a first plurality of subcarriers which are contiguous in frequency and (2) a second uplink allocation information indicating a second frequency block corresponding to a second plurality of subcarriers which are contiguous in frequency and a third frequency block corresponding to a third plurality of subcarriers which are contiguous in frequency, the second frequency block and the third frequency block being separated in frequency.

Wireless communication system, wireless communication setting method, base station, mobile station, and program

A radio communication system includes: a plurality of cells having different scrambling sequences, respectively, wherein at least two cells communicate with at lease two user terminals connected to different serving cells; and a controller which controls the plurality of cells and provides a single scrambling sequence to said at least two cells and said at least two user terminals for control signal transmission and reception.

Radio communication system and communication control method

Provided is a technique capable of reporting resource block allocation information with no waste when an allocated resource block is reported, because in the current LTE downlink, the waste of the amount of resource allocation information increases in some cases since a restriction is imposed such that 37-bit fixed scheduling information is transmitted. A resource block group consisting of at least one or more resource blocks continuous on the frequency axis is allocated to a terminal, and the number of controlling signals for reporting allocation information indicating the allocated resource blocks is determined.

Resource allocation method, identification method, base station, mobile station, and program

A communication apparatus includes an accumulation meansthat temporarily accumulates communication data in a previous stage of transmission to the MAC layer, an estimation meansthat estimates an amount of transmittable data, which is an amount of data that can be transmitted in the MAC layer in a predetermined period, by using a radio wave index that is an index related to a radio wave in the frequency and/or a communication index that is an index related to wireless communication using the frequency, the indices being measured by an own apparatus or a wireless device including a MAC layer used by the own apparatus, and a control meansthat controls, on the basis of an estimation result of the amount of transmittable data, a data flow of when the communication data accumulated in the accumulation meansis transmitted to a lower layer.

Communication apparatus, wireless communication system and data flow control method

A reference signal multiplexing method for multiple mobile stations includes: grouping together control signals for the multiple mobile stations; and multiplexing reference signals corresponding to the control signals by CDM over the same bandwidth as that of grouped control signals.

Growing community of inventors

Tokyo, Japan

Takamichi Inoue