Patent application number | Description | Published |
20090073946 | Wireless Transmission System - A wireless transmission device makes it possible to access the internet from a wireless LAN terminal, and notifies the state of wireless connection to a public wireless transmission network to the wireless LAN terminal, thereby alleviating uncertainty and disquiet on the part of the user when connecting to this network. | 03-19-2009 |
20100165858 | COMMUNICATION CONTROL APPARATUS AND METHOD - When it is judged that the size of a band of a wireless IP network ( | 07-01-2010 |
20100189034 | WIRELESS COMMUNICATION APPARATUS AND SERVER APPARATUS - Each of wireless communication terminals UA | 07-29-2010 |
20100248734 | Communication Control Method, Communication System and Communication Control Apparatus - Based on a first weighting factor adopted for a first wireless base station | 09-30-2010 |
20100296442 | COMMUNICATION APPARATUS AND COMMUNICATION CONTROL METHOD - An origination terminal UA | 11-25-2010 |
20100309883 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus is provided with a wireless communication unit ( | 12-09-2010 |
20110007714 | WIRELESS COMMUNICATION APPARATUS - In order to perform handover from a first wireless communication network to a second wireless communication network, a handover control unit obtains a handover preparation time Tb to handover, respective delay times Tddn | 01-13-2011 |
20110019580 | WIRELESS COMMUNICATION APPARATUS - A reproduction speed of an application being executed is controlled with changing an upper limit of accumulation of a jitter buffer based on a radio state during communication by a first wireless communication network. If it is determined to start handover preparation from the first wireless communication network to a second wireless communication network, a preparation time before handover and an absolute delay time of each of the first wireless communication network and the second wireless communication network are obtained from the handover control unit. Based on such information obtained and a data amount in a jitter buffer at a time when it is determined to start the handover preparation, the reproduction speed of the application being executed is controlled to be slowed down. Thereby, it is possible to perform handover to a different wireless communication network without deteriorating reproduction quality and real-time property. | 01-27-2011 |
20110026494 | WIRELESS COMMUNICATION APPARATUS AND COMMUNICATION APPARATUS - In order to perform handover from a first wireless communication network to a second wireless communication network, when it is determined to start preparing for handover from the first wireless communication network to the second wireless communication network, data are transmitted via the first wireless communication network and simultaneously accumulated for a predetermined period. The accumulated data are transmitted via the second wireless communication network after handover. It thus enables to transmit the data in the predetermined period, which are expected to be lost because of handover, while accumulating the data and to transmit accumulated data after handover. Thereby, it is possible to provide a wireless communication apparatus and a communication apparatus capable of performing handover to a different wireless communication network without causing packet loss and thus maintaining stable reproduction quality and real-time property all the time. | 02-03-2011 |
20110044288 | WIRELESS COMMUNICATION APPARATUS - In order to perform handover from a first wireless communication network to a second wireless communication network, a handover control unit obtains a handover preparation time to handover, and by receiving data via the first wireless communication network and the second wireless communication network separately obtains a delay time difference between the networks based on reception times of the same data. Based on such information obtained and an amount of the data in a jitter buffer at a point to determine to start handover preparation, the handover control unit controls a reproduction speed of an application being executed. Thereby, it is possible to perform handover to a different wireless communication network without deteriorating reproduction quality and real-time property and causing packet loss. | 02-24-2011 |
20110044293 | WIRELESS COMMUNICATION APPARATUS AND COMMUNICATION APPARATUS - There is a problem that, if a silent period is generated to a real-time application such as VoIP due to handover using BBM method, a user has a sense of anxiety and misunderstands that communication is completely disconnected. If the silent period is generated to the real-time application such as VoIP due to packet loss at handover, a terminal activates handover alarm (beep sound, for example), indicating that handover is in progress, during the silent period. Thereby, it notifies the user that the silent period is caused by handover and prevents user's misunderstanding that communication is completely disconnected. | 02-24-2011 |
20140254541 | MOBILE COMMUNICATION SYSTEM AND MOBILE COMMUNICATION METHOD - A mobile communication method is applied to a mobile communication system comprising a general base station that manages a general cell and a specific base station that manages a specific cell having a coverage area smaller than a coverage area of the general cell. The mobile communication method comprises: a step A of notifying, by the general base station, the specific base station of scheduling information indicating an uplink radio resource to be assigned to general mobile terminals that are mobile terminals in a connected state in the general cell, at a time interval of a predetermined time; and a step B of notifying, by the specific base station, the general base station of general mobile terminal interference information indicating interference that the specific cell receives according to the uplink signals transmitted from the general mobile terminals at the time interval of the determined time. | 09-11-2014 |
20140293965 | MOBILE COMMUNICATION METHOD - A mobile communication method is applied to a mobile communication system including a general base station that manages a general cell and a specific base station that manages a specific cell having a coverage area smaller than a coverage area of the general cell. The mobile communication method comprises: a step A of transmitting, from a general mobile terminal to the specific base station, an RACH signal for interference detection, the general mobile terminal being a mobile terminal in a connected state in the general cell; and a step B of notifying, by the specific base station, the general base station of a detection result of the RACH signal for interference detection. | 10-02-2014 |
20140307687 | COMMUNICATION CONTROL METHOD, MOBILE COMMUNICATION SYSTEM, AND BASE STATION - A communication control method in a mobile communication system having a first base station and a second base station having a smaller coverage area than the first base station, comprises: a step A of transmitting information indicating interference in uplink detected by the second base station, from the second base station to the first base station; a step B of performing processing by the first base station and/or the second base station to change a radio environment around the boundary of a coverage area of the second base station; and a step C of identifying an interfering user terminal in the uplink by the first base station, from first user terminals being connected with the first base station, based on radio environment information reported by the first user terminals. | 10-16-2014 |
20140348104 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which a CoMP cooperating set formed by a plurality of base stations and a user terminal perfume CoMP communication therebetween, a predetermined base station included in the CoMP cooperating set transmits, to another base station which is not included in the CoMP cooperating set, an addition request for requesting the other base station to be added to the CoMP cooperating set, and the predetermined base station transmits a C-RNTI being used for the CoMP communication with the user terminal to the other base station, when transmitting the addition request. | 11-27-2014 |
20140362801 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which a plurality of base stations included in a CoMP cooperating set allocate a same communication resource to a user terminal to perform a communication, each of the plurality of base stations comprises a notification unit that notifies another base station included in the CoMP cooperating set of a communication resource of allocation candidate for the user terminal in the base station itself; a receiver that receives a notification of a communication resource of allocation candidate for the user terminal in another base station included in the CoMP cooperating set from the other base station; and a selector that selects a communication resource to be allocated to the user terminal from communication resources of allocation candidates in the plurality of base stations, based on the notification received by the receiver. | 12-11-2014 |
20140364126 | MOBILE COMMUNICATION METHOD - A mobile communication method is applied to a mobile communication system including a general base station and a specific base station. A distance between an edge closest to the general base station among edges of a coverage area of the specific cell and the general base station is a distance L | 12-11-2014 |
20140376476 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which a plurality of base stations included in a CoMP cooperating set allocate a communication resource to a user terminal to perform communication, each of the plurality of base stations comprises a receiver that receives information on resource allocation to the user terminal in another base station included in the CoMP cooperating set, from the other base station; and a reporting unit that reports information on another specific base station included in the CoMP cooperating set to a CoMP management apparatus managing the CoMP cooperating set when the receiver does not normally receive the notification from the other specific base station. | 12-25-2014 |
20140376477 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which a plurality of base stations included in a CoMP cooperating set allocate a same communication resource to a user terminal to perform a communication, each of the plurality of base stations comprises a notification unit that notifies another base station included in the CoMP cooperating set of a communication resource of allocation candidate for the user terminal in the base station itself; a receiver that receives a notification of a communication resource of allocation candidate for the user terminal in another base station included in the CoMP cooperating set from the other base station; and a disabling unit that performs setting to disable allocation of a communication resource of allocation candidate, depending on a reception state of the receiver. | 12-25-2014 |
20140376478 | BASE STATION AND COMMUNICATION CONTROL METHOD - A base station supporting CoMP, comprises: a receiver that receives a notification of a CoMP type supported by a neighboring base station from the neighboring base station; and a storage that stores information of the neighboring base station in association with the CoMP type supported by the neighboring base station based on the notification received by the receiver. | 12-25-2014 |
20150023274 | MOBILE COMMUNICATION SYSTEM, BASE STATION, USER TERMINAL, AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which communications is performed by using a downlink frame configuration including a control domain for transmitting downlink control information and a data domain for transmitting downlink user data, each of base stations that performs CoMP communications with a user terminal comprises a transmission unit that transmits the downlink control information by using the data domain in place of the control domain, when the CoMP communication with the user terminal is performed. | 01-22-2015 |
20150023320 | COMMUNICATION CONTROL METHOD, BASE STATION, HOME BASE STATION, AND GATEWAY DEVICE - A communication control method includes: an establishment step of establishing, between a home base station selected from a plurality of home base stations in control of a gateway device and other base station not in control of the gateway device, a communication path which passes through the gateway device and which does not pass through a core network; and a step of performing inter-base station communications using the communication path established in the establishment step, by the selected home base station and the other base station. | 01-22-2015 |
20150023323 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION CONTROL METHOD - In a mobile communication system in which a CoMP cooperating set formed by a plurality of base stations and a user terminal perform communication therebetween, the CoMP cooperating set includes a main base station controlling CoMP communication with the user terminal, and the main base station transmits, to another base station included in the CoMP cooperating set, a switch request for requesting the other base station to be a new main base station in the CoMP cooperating set based on a measurement report from the user terminal. | 01-22-2015 |
20150043532 | COMMUNICATION CONTROL METHOD, BASE STATION, HOME BASE STATION, AND GATEWAY DEVICE - A communication control method applied to a mobile communication system, the mobile communication system including a home base station that forms a specific cell, a base station that determines whether to perform handover of a user terminal to the specific cell and a mobility management device that performs verification of the user terminal for access permission to the specific cell, the communication control method comprises a request step of requesting the mobility management device to perform the verification of the user terminal before the base station determines to perform the handover to the specific cell. | 02-12-2015 |
20150045042 | MOBILE COMMUNICATION SYSTEM AND MOBILE COMMUNICATION METHOD - A non-anchor radio base station ( | 02-12-2015 |
20150056992 | BASE STATION AND COMMUNICATION CONTROL METHOD - A base station in a mobile communication system in which a CoMP cooperating set and a user terminal perform communication therebetween, comprises: an acquisition unit that acquires transmission delay between itself and a neighboring base station; and a registration unit that registers the neighboring base station as a base station to be included in the CoMP cooperating set when the transmission delay acquired by the acquisition unit is smaller than a threshold. | 02-26-2015 |