Nec Corporation

Nec C Orporation

Kojiro Hamabe

Jinsock Lee

Hiroaki Aminaka

Nahoko Takano

Hisashi Futaki

Yoshikazu Kakura

Motoki Morita

Kazushi Muraoka

Masayuki Ariyoshi

Takahiro Nobukiyo

Toshifumi Nakamura

Naoto Ishii

Akihisa Ushirokawa

Shousei Yoshida

Nahoko Kuroda

Hiroshi Furukawa

Daisuke Ohta

Toshihito Kanai

Mayu Takeshita

Toshifumi Sato

Takamichi Inoue

Yasuhiko Matsunaga

Mariko Matsumoto

Soichi Tsumura

Akio Aoyama

Hiroto Sugahara

Yoshinori Watanabe

Tomohiro Kikuma

Motoya Iwasaki

Kenji Kawaguchi

Le Liu

Mitsuyuki Nakamura

Kosei Kobayashi

Yukitsuna Furuya

Takashi Mochizuki

Masanori Taketsugu

Toshiyuki Sashihara

Kenichirou Yamazaki

Jinsook Lee

Akiyo Yoshimoto

Akihisa c/o Nec Corporation Ushirokawa

A radio communication system provided with a communication device and a radio communication network system is characterized by comprising a transmission delay estimate information transmitting means for transmitting transmission delay estimate information to the radio communication network system when the transmission condition of the transmission delay estimate information is met.

Radio communication system, communication apparatus, radio communication network system and method therefor

Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.

Radio communication system, method, program, base station apparatus, multi-cell/multicast cooperation control apparatus

A resource allocation method and device are provided that can achieve uniform loads on and stable quality of a common channel available to mobile stations having no dedicated channels. A method for allocating common channel resources in a system in which a plurality of first radio communication devices transmit data to a second radio communication device over a common channel, based on first resource allocation information, includes: by the second radio communication device, transmitting second resource allocation information to at least one of the first radio communication devices; and by each of the first radio communication devices, transmitting data to the second radio communication device over the common channel, based on any one of the first resource allocation information and the second resource allocation information.

Method and device for allocating common channel resources

Because it is not possible to sufficiently reduce the number base stations that start uselessly in spite of being in a low traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently. A base station starts transmission of a control signal with predetermined power when communication between another base station and a mobile station is started and a first predetermined condition is satisfied.

Base station, radio communications system, base station control method, radio communications method and base station control program

To solve a problem that unless all of a plurality of AICH signature states are correctly decoded, the contents of reception results cannot be recognized and the error rate of signature decoding will be high. In this embodiment, a base station uses, out of a signature combination, the signature of at least one predetermined position to indicate information containing a preamble reception result and uses the signature of a position other than the predetermined position to indicate a transmission profile information number of an uplink channel for notification to a user equipment. Thus, the error rate related to reception results can be reduced as compared with the case where a single signature combination is used to notify all pieces of information.

User equipment and method for resource allocation

A mobile station determines, in accordance with reception quality of a radio signal from a base station, a measurement cycle of a predetermined measurement on a link status and/or on/off of the predetermined measurement and controls execution of the predetermined measurement based on the determination.

Radio communication system and method

A radio station () includes a first part (A) and at least one second part (B). The second part (B) can be arranged so as to be physically separated from the first part (A) and is connected to the first part (A) via a transmission line () so as to be able to communicate with the first part (A). The first part (A) includes a bearer termination unit () capable of terminating at least one bearer between an upper network and the radio station (). The second part (B) includes a physical layer signal processing unit () that performs physical layer signal processing. The physical layer signal processing includes channel coding and decoding for user data pertaining to a first mobile station connected to the second part (B) among a plurality of mobile stations.

Radio station and method of processing user data with radio station

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Tokyo, Japan

Kojiro Hamabe