Nec Corporation

Takahiro Nobukiyo

Hisashi Futaki

Kojiro Hamabe

Daisuke Ohta

Naoto Ishii

Motoki Morita

Takanori Iwai

Nobuhiko Itoh

Nahoko Takano

Jinsock Lee

Robert Arnott

Toshifumi Sato

Takamichi Inoue

Motoya Iwasaki

Yasushi Maruta

Kosei Kobayashi

Nahoko Kuroda

Takashi Mochizuki

Toru Osuga

Raymond Kwan

Daisuke Matsuo

Yuki Kogure

Akiyo Yoshimoto

To provide a control device that can prevent an increase in a processing load and that can effectively allocate a radio resource. A control device () according the present disclosure includes: a deciding unit () configured to decide whether or not an interval between generation of a first flow that is generated when performing radio communication between a communication terminal () and a base station () and generation of a second flow that is generated after the generation of the first flow exceeds a permissible delay time of the first flow; and a determination unit () configured to determine deletion of non-transmitted data related to the communication terminal () after lapse of the permissible delay time of the first flow when it is decided that the generation interval exceeds the permissible delay time of the first flow.

Control device, control method, and non-transitory computer readable medium storing program

The present invention enhances the quality that a user feels in a wireless communication system. This base station deviceis provided with: a calculation unitwhich calculates a data transmission start deadline at which data transmission to a wireless terminal devicecan be completed by a completion deadline for transmission to the wireless terminal deviceset on the basis of information about the application, when the data, which is transmitted to the wireless terminal deviceby the application executed by a server devicein response to a request from the wireless terminal deviceis transmitted to the wireless terminal deviceby using a wireless resource; and an allocation unitwhich allocates a wireless resource necessary for the transmission of the corresponding data to the wireless terminal deviceon the basis of the transmission start deadline and the current time.

Base station device, wireless communication control method, and recording medium having base station control program stored therein

A base station apparatus is connected to a plurality of transmission/reception points each switching a transmission scheme according to reception environment of wireless terminal and providing service to wireless terminal. The base station apparatus includes a history recording part recording history of beam and transmission scheme selected by wireless terminal with respect to each transmission/reception point; a calculation part calculating a second throughput when service is received using one or more beams being candidates for selection by wireless terminal among beams transmitted by a second transmission/reception point different from a first transmission/reception point connected to wireless terminal; and a transmission/reception point selection part providing service from the second transmission/reception point to wireless terminal by the beam and the transmission scheme corresponding to the second throughput subject to satisfying a predetermined condition with respect to the first throughput being the measured throughput with the first transmission/reception point connected to wireless terminal.

Base station apparatus, service provision method, and program

In the present invention, in order to predict discontinuous wireless quality changes without using wireless terminal position information in a cellular type wireless communication system, a wireless quality prediction device is provided with: a measurement information acquisition means for acquiring wireless quality measurement information measured by a wireless terminal that moves within a wireless communication system having at least two wireless cells; a wireless quality transition pattern construction means for using the measurement information to construct, as a wireless quality transition pattern, a time-series data pattern of wireless quality associated with the passage of time; and a wireless quality prediction means for acquiring from the wireless quality transition pattern construction means a wireless quality transition pattern having a high degree of similarity to the measurement information, in regards to the wireless quality measurement information acquired from a wireless terminal for which a prediction is to be made, and for using the acquired wireless quality transition pattern to predict that future wireless quality in respect to the wireless terminal for which a prediction is to be made, or a wireless cell in which the wireless terminal for which a prediction is to be made is located, will change in the future.

Wireless quality prediction device, wireless base station, wireless terminal, wireless quality prediction method and wireless quality prediction program

Provided is a radio base station, etc. that realize transmission control in view of QoE. According to a first aspect of the present invention, there is provided a radio base station that receives a packet(s) transmitted from a packet transmission apparatus via a network and transmits the received packet(s) to a wireless terminal(s), the radio base station including: acquisition means that acquires a packet type(s) or a packet identifier(s) set in the packet(s) by the packet transmission apparatus; and control means that performs transmission control to change a transmission order of the packet(s) based on the packet type(s) or the packet identifier(s).

Radio base station, packet transmission apparatus, wireless terminal, control method, and program

The coverage control method includes at least: step Sof detecting that a load of an own cell is higher than a predetermined threshold (Lth) when there is another cell whose coverage partially overlaps the own cell; step Sof selecting an accommodation candidate cell that is a candidate to which a mobile station accommodated in the cell is unloaded, from the another cell based on a load condition related to a communication load that is a coverage control execution target; step Sof selecting a continuously accommodated mobile station that is a mobile station that continues to be a coverage control target of the own cell, from the mobile station accommodated in the own cell based on radio quality of the selected accommodation candidate cell; and step Sof controlling a coverage of the own cell by targeting at the selected continuously selected mobile station.

Coverage control method, base station apparatus, wireless communication system, and non-transitory computer readable medium having base station control program stored thereon

The application provides a CA scheduling scheme, a base station, a radio communication system and a program to allocate radio resources based on allocation indexes calculated using the bandwidths of component carriers and traffic loads. A frequency block allocation method is for a radio communication system in which a radio station and mobile stations perform radio communication using a frequency block selected from a plurality of system bands. The method comprises an allocation number determination step of determining number of system bands that can allocate to each mobile station; a communication band index calculation step of calculating a communication band index based on bandwidths and loads of the system bands according to the determined allocation number; an allocation index calculation step of calculating an allocation index of the mobile station for each of the system bands using the communication band index and a frequency block allocation step of allocating frequency blocks to the mobile station based on the allocation indices.

Allocation method, radio communication system, allocation apparatus, and program thereof

A radio resource setting method according to the present invention is a method for, when there are a first communication area managed by a pico base station () and a second communication area including at least part of the first communication area and managed by a macro base station (), setting radio resources that the pico base station () and macro base station () can use for wireless communication with a terminal (), the radio resource setting method comprising: calculating determination conditions for determining whether or not to set radio resources whose use is limited in the second communication area; calculating a ratio of the radio resources whose use is limited in the second communication area; and setting the radio resources whose use is limited in the second communication area using the determination conditions and the ratio of the radio resources whose use is limited.

Radio resource setting method, base station, radio resource setting system, and non-transitory computer readable medium

The present invention addresses the problem of providing technology which increases the accuracy for estimating quality of a communication channel even in a case in which transmission time limit frames have been set between neighboring cells. The present application relates to quality estimation of a communication channel used by a base station for performing wireless communication with a terminal within a communication area, and is characterized in acquiring quality information for the communication channel between the base station and the terminal, acquiring reception error information related to reception errors for data communication using the communication channel, acquiring transmission time-limit frame information set by a neighboring base station of the base station, updating correction values in accordance with setting information for the transmission time-limit frame information and the reception error information, and estimating the quality of the communication channel using the correction values and the acquired quality information.

Communication channel quality estimating method, wireless communications system, base station, and program

User throughput fairness between a small cell and a macrocell is improved without affecting load balancing with another small cell. A radio station () having a radio area () thereof, at least a part of which is adjacent to a radio area () which is larger than the radio area () of the radio station () and is managed by another radio station (), acquires a load on the own station and a load on the another radio station and controls the transmission power of a radio terminal () connected to the radio area of the own cell, based on the relative magnitude of the load on the own cell to the load on the another radio station.

Radio communication system, radio station, and method for controlling transmission power

The method is a method of setting radio resources which a pico base station () and a macro base station () can use for wireless communication with a terminal, and includes obtaining loads the pico base station () and the macro base station (), calculating a first delay index of the pico base station using the load of the pico base station (), calculating using the load of the macro base station () a second delay index of the macro base station () in case where the macro base station () has set radio resources whose use is limited, and calculating a ratio of the radio resources whose use is limited by the macro base station () based on the first and second delay indices, and setting the radio resources whose use is limited in the second communication area using the ratio of the radio resources whose use is limited.

The present invention aims to provide a resource allocation method in a communication system that can effectively suppress a transmission delay. Provided is a resource allocation system in a communication system which includes a terminaland a base station, wherein data is regularly generated at the terminal, the base station allocates a resource to the terminal, and the terminal transmits data by using the resource. The terminalincludes a generated traffic monitoring unitthat monitors the data and, when a predetermined change occurs in the data, reports it to the base station. The base stationincludes a resource management unitthat determines a resource allocation according to the report from the terminal.

Resource allocation method in communication system, resource allocation system, and base station used for the same

This invention is directed to provision of a technique for dynamically performing a priority band establishment that can achieve the suppression of interference between adjacent cells. This invention is characterized in that: a base-point resource block, which serves as a base point in establishing a priority resource block to be used, on a priority basis, by a terminal for which the quality of a communication path does not meet a predetermined quality, is so decided as to be different from the base-point resource block of an adjacent communication area; and the priority resource block is established, based on a communication load, in a predetermined order with the decided base-point resource block used as the base point.

Setting apparatus, communication system, base station, and program

Provided is a setting method for the usable resource for a communication terminal which, while suppressing an inter-adjacent-cell interference, improves a selection flexibility for a band for the communication terminal subjected to a strong influence of the adjacent-cell interference. A base station, which performs radio communications with a communication terminal within a main communication area, includes: a priority band setting unit that sets a main priority radio resource that can be used for the main communication area on a higher priority basis than for a communication area adjacent to the main communication area, and acquires a particular priority radio resource that can be used for at least one particular communication area adjacent to the main communication area on a higher priority basis than for a communication area adjacent to the at least one particular communication area; and a usable band setting unit that acquires a communication quality difference regarding the communication terminal between communication quality related to the main communication area and communication quality related to the at least one particular communication area, and sets the main priority radio resource to which at least one particular priority radio resource is added, as usable radio resources for the communication terminal when at least one condition that the communication quality difference is larger than a threshold value is fulfilled.

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Tokyo, Japan

Takahiro Nobukiyo