Ntt Mobile Communications Network, Inc.

Ntt Docomo, Inc.

Bandai Namco Entertainment Inc.

Ntt Communications Network, Inc.

Shogo Ito

Yasushi Yamao

Shinzo Ohkubo

Toshihiro Nozawa

Yoshiaki Hirai

Takahiro Inoue

Takayuki Mizuki

Fumiyuki Adachi

Yoshihito Nakagawa

Mitsuru Murata

Hisashi Takeshita

Atsushi Murase

Noriyuki Tsutsumi

Hiroyuki Itazu

Satoshi Tagiri

Setsuya Ohashi

Kobaruto Shimada

Nobuyuki Nanba

Hidenari Kato

Nobuhiro Nishikawa

Akira Tsurumachi

Shuji Tachibana

Takashi Nakagawa

A video slot machine starts spinning display of video reels upon detecting a spin operation, and performs a lottery to determine a special position in symbol stop positions in a reel display area. A character appears behind the video reel in such a manner that a displayed range of the character includes the symbol stop position determined to be the special position. When the video reels stop with a chance symbol stopped in front of the character, a replacement target is selected from the change symbol and other symbols in its periphery in accordance with a section of the character stopped by the chance symbol. Then, outcome of the reels is determined with the replacement target symbols replaced with a reward symbol, and payout is performed.

Video slot machine, server system, and computer system

A disclosed battery charger comprises multiple interfaces provided corresponding to multiple mobile devices, the interfaces being connected to the mobile devices in wired or wireless connection; a charge parameter setting unit setting one or more charge parameters for the mobile devices; a switching control unit switching timing of charging the multiple mobile devices based on the charge parameters set by the charge parameter setting unit; and a charging unit charging one of the mobile devices selected by the switching control unit.

Battery charger for multiple mobile devices

The invention provides a mobile phone that effectively meets user needs to a high degree. A mobile phone in which a lower substrate on a operation panel side is foldably connected to a upper substrate on a liquid crystal display side, includes: a lower casing removably fitted to the lower substrate; a upper casing separated from the lower casing and removably fitted to the upper substrate; and a slip-off prevention section for fixing the lower casing to the lower substrate in such a manner that the lower casing is removable from the lower substrate, and for fixing the upper casing to the upper substrate in such a manner that the upper casing is removable from the upper substrate. The above constitution allows easily modifying the overall design of the mobile phone, thereby easily meeting the needs of the user to a high degree.

Mobile phone

In a mobile communication system, radio channel capacity can be secured. A plurality of base stations transmit to a mobile station information X0 and the like about diversity handover, and a reference signal (such as a perch signal). The mobile station measures received quality (such as a received power) of the reference signal. The mobile station makes a decision for each of the plurality of base stations as to whether the service area is to be selected as a candidate of a service area in which the mobile station will start new communication, and/or as a candidate of a service area in which the mobile station will stop current communication.

Diversity handover control apparatus and method

A method and apparatus for cellular phone failure judgment is provided, in which a cellular phone is connected to an external terminal and the external terminal reads normal communication history information, origination and receive failure history information and communication interruption history information which are stored in the cellular phone, and performs failure judgment for the cellular phone by the history information and judgment parameters.

Cellular phone, cellular phone failure judgment method and failure judgment apparatus

A radio paging signal coding control scheme capable of improving the reception characteristic of the receiver by carrying out a coding control to determine logical channels for accommodating paging signals such that the transmission rate equivalently becomes as low as possible according to the paging signal traffic, without interrupting the paging signal coding processing while maintaining the combination of transmission rate and modulation scheme for frames, is disclosed. In the case of using prescribed transmission rate and N-valued modulation scheme, logical channels to be used for transmission of paging signals among a plurality of available logical channels are determined by setting priority orders among a plurality of available logical channels such that a number of states of modulated signals becomes less than N when paging signal traffic is small.

Radio paging signal coding control scheme using variable number of logical channels according to paging signal traffic

A paging system including one or more pagers having a transmitting function. The pagers can transmit to a base station a response upward signal acknowledging reception of a paging signal, and a pager initiative signal through direct sequence spread spectrum modulation. The pager assigns different spreading codes to the response upward signal acknowledging the reception of the paging signal and the pager initiative signal, so that the base station can receive them independently.

Radio paging system

A digital modulation and demodulation scheme for radio communications which is capable of reducing errors due to fading while maintaining the characteristic of the M-ary modulation and demodulation scheme that it is robust against interferences. At the transmitting side, transmission data are divided in advance into blocks of LN bits length each and each block is divided into N sets of L bits data sequences. Then, orthogonal codes of M bits length each corresponding to L bits codes given by the L bits data sequences are generated, and N sets of orthogonal codes for each block are multiplexed into a multiplexed signal, such that M bits constituting each orthogonal code are dispersed in time in the multiplexed signal. A digital modulation is then applied to a carrier using the multiplexed signal.

Robust digital modulation and demodulation scheme for radio communications involving fading

In a radio paging system wherein a user carrying a radio paging receiver is paged by means of radio waves, and the radio paging receiver sends back a response signal when it has received a paging signal addressed to itself, the response signal is sent back by means of direct sequence modulation using a code uniquely determined in accordance with the base station ID signal, which is different for each base station, and which has been inserted in the paging signal sequence transmitted from the base station, or in accordance with the order of each paging signal within the paging signal sequence. As a result, the response signal can be transmitted at low power from each radio paging receiver, and effective utilization can be made of frequency, regardless of an increase in the number of radio pagers.

In a time diversity receiver, where in time diversity is performed using the detector output, without any use of a receiving level detection circuit, thereby simplifying the receiver circuitry and reducing power consumption.

Time diversity receiver

In a mobile radio communication system wherein, in order to call a receiver from a base station, a paging signal containing address information corresponding to the receiver to be called is transmitted n times, the position of a paging signal that is transmitted for the second or subsequent time is determined, in accordance with a prearranged rule, in relation to the position of the same paging signal when it was transmitted for the first time, and the receiver achieves more efficient battery savings by stopping its receiving operation with respect to signal portions which have been confirmed as having already been received without error. The receiving operation is intermittently stopped at a timing corresponding to identical signal portions of the same repeatedly received paging signal.

Selective radio paging system and pager

In a system which transmits the same paging signals a plurality of times through the air by radio waves, paging signals serve to selectively page radio receivers. Base station facilities can be deployed at a comparatively low cost even when there are few customers per service area by variably setting the number of times that the paging signals are transmitted from the base stations.

Mobile communications system for repeatedly transmitting paging signals

Mobile communications system

A system wherein time diversity reception is performed for each error-corrected or error-detected code word without distinguishing between the address signal and the message signal, the code words being the units which make up the address and message signals. A received signal comprising correctly decoded code words is obtained by selecting code words that are judged to have been correctly decoded in accordance with error detecting/correcting logic from among code words with the same content that have been received a plurality of times. When a code word has been correctly decoded, part of the selective radio paging receiver is inhibited from working during the time intervals when correctly received code words would be received, thereby decreasing battery consumption.

Time diversity communications system

A receiver which receives a signal transmitted while the symbol rate is changed over from among a plurality of different values, and which varies, in accordance with the symbol rate, the pass band width of the filter that removes unwanted signals from the detector output. By compensating for changes in delay produced by alteration of the pass band width of the filter, a receiver, according to this invention, recovers a clock that is synchronized with the symbol rate after changeover, without discontinuities occurring when the symbol rate is changed over.

Growing community of inventors

Yokohama, Japan

Shogo Ito