Ntt Docomo, Inc.

Mitsubishi Electric Corporation

Hidehiko Oyane

Daisuke Tanigawa

Tatsuro Yajima

Akihito Hanaki

Akihiro Fujiwara

Noriyuki Fukui

Takayuki Watanabe

Hiroyuki Hosono

Takefumi Yamada

Yasuhiro Kawabe

Tetsuya Mishuku

Masayuki Matsubara

Hiroki Zukawa

Tsutomu Sugaya

Akihiro Hikuma

A base station in a mobile communication system transmits and receives wireless signals with a user apparatus in a cell; in the case where the base station is connected to a communication network through a router, obtains an address of the router; periodically receives time information from a time information server through the communication network; stores in a memory unit the router's address and a current time indicated by the time information; and () in the case where a current-time-storing-is-stopped period is equal to or greater than a threshold value, or () in the case where the current-time-storing-is-stopped period is less than the threshold value and is equal to or greater than another threshold value, and an address just received from the router is different from the address stored in the memory unit, transmits a control signal for stopping the transmission of the wireless signal.

Base station in mobile communication system and wave stopping method

A radio base station BTS includes an estimation unitconfigured to estimate a time when a buffer of a scheduled mobile station UE becomes empty based on a remaining amount of data in the buffer of the mobile station UE, the remaining amount reported by the mobile station, and a sending unitconfigured to send the mobile station UE a Zero Grant instructing to stop transmission of a data signal via an E-DPDCH based on the estimated time.

Radio base station

A terminal switching method for switching terminals, in a communication system in which HARQ processing is performed, to which a base station grants a transmission permission, from a terminal A to a terminal B includes notifying the terminal B of aborting of the transmission permission, setting a time point at which an HARQ process whose state of the HARQ processing is a retransmission waiting state with the terminal A is performed as a virtual starting point, setting a retransmission waiting window having a predetermined window length with the virtual starting point being regarded as its starting point, and notifying the terminal B of the transmission permission when there is no HARQ process having the retransmission waiting state with the terminal A, wherein the virtual starting point setting and the window setting are repeated until there is no HARQ process having the retransmission waiting state with the terminal A.

Terminal switching method, base station, and communication system

A mobile communication method includes step for transmitting a first scheduling grant information to a first mobile station UE scheduled in a current scheduling assignment slot, and transmitting a second scheduling grant information to a second mobile station UE to be scheduled in a next TTI by the radio base station Node B at a time of switching between mobile stations UE to be scheduled, the first scheduling grant information instructing to stop transmission of a MAC-e PDU in a next transmission time interval, the first scheduling grant information corresponding to a minimum size of the MAC-e PDU which can contain only one MAC-d PDU.

Mobile communication method and radio base station

A radio base station includes: a table storage unit storing a table in which an E-TFCI indicating a transport format combination indicator of the physical data channel to be transmitted by a mobile station is associated with &#x3b2;ed that is used to determine a SG and is an offset value of transmission power of the physical data channel to be transmitted by the mobile station; a parameter selector selecting the &#x3b2;ed associated with the E-TFCI from the table; and a communication controller determining a SG based on the &#x3b2;ed thus selected and an E-TFCI associated with the selected &#x3b2;ed, and controlling transmission power of the mobile station by using the SG thus determined.

Radio communication system, radio base station, and mobile station control method

A radio base stationaccording to the present invention includes a reference channel power setting unitconfigured to change a transmission power of a reference channel, an associated channel power setting unitconfigured to set a relative power offset of an associated channel by using a value relative to the reference channel, a power parameter holding unitconfigured to hold power parameters set by the reference channel power setting unitand associated channel power setting unit, a power parameter adjustment unit configured to adjust the relative power offset of the associated channel in a case where the transmission power of the reference channel is changed, and a transmitterconfigured to transmit a signal of each channel on the basis of information in the power parameter holding unit, wherein the power parameter adjustment unitmaintains the transmission power of the associated channel unchanged even though the transmission power of the reference channel is changed.

Radio base station, mobile communication system and mobile communication method for controlling a transmission power of a reference channel and an associated channel

The present invention provides a radio base station apparatus that is capable of freely expanding an area, improving the degree of freedom in designing of the area significantly and reducing the equipment investment. The radio base station apparatus includes: a plurality of transmission/reception units which are remotely installed in a service area and to which necessary numbers of carriers and sectors are assigned in accordance with the respective installation areas; a modulation/demodulation unit which can set/modify the soft handover enabled range and modulates/demodulates a signal transmitted/received to/from the transmission reception units; and a selector switch which is connected to the transmission/reception units remotely installed in the service area via cables so as to select connections between the modulation/demodulation unit and the transmission/reception units.

Radio base station apparatus configured to modify a softer handover enabled range

To provide a base transceiver station and channel rate control method for enabling the base transceiver station to execute stable processing in a radio communication system compliant with an HSDPA communication scheme, a base transceiver stationcompliant with high speed downlink packet access is comprised of a Uu rate calculating sectionthat obtains radio quality between a radio access networkand a mobile terminal, a Ui rate calculating sectionthat obtains channel quality between the stationand a radio network controller, a CPU utilization measurement function sectionthat measures the CPU utilization of the station, and a CA calculating sectionthat calculates a permissible data amount using the radio quality, channel quality and CPU utilization.

Base transceiver station and channel rate control method based on radio quality, channel quality and CPU load

A radio equipment in a radio base station is configured to measure received signal strength of an uplink signal transmitted by a mobile station and includes a TRX function unit configured to transmit IQ data and control information to a radio equipment controller by using a frame including an IQ data region for mapping the IQ data and a control region for mapping the control information, the IQ data being obtained by subjecting the uplink signal to demodulation processing (orthogonal demodulation processing), and the TRX function unit is configured to map information indicating the received signal strength (RSSI) measured by the measurement unit to a fixed region in the control region.

Radio base station, radio equipment, and radio equipment controller

A radio base station wherein, when a radio equipment control detects an uplink communication failure on a physical circuit, a downlink communication processing unit is configured to transmit a downlink IQ data for all combinations of antennae and carriers to a radio equipment with all values of the downlink IQ data set to '0,' and a downlink radio equipment is configured to stop a transmission of a downlink signal of all the carriers through all the antenna when the downlink IQ data whose values are all '0' is received.

Radio base station, radio equipment control and radio equipment

A base station includes a scheduling unit and a call reception control unit. The call reception control unit includes a managing unit that updates total resource usage amount based on total resource allocation amount and manages the total resource usage amount, and a decision unit that adds an initial radio resource to be allocated to a new call to the total resource usage amount and decides whether the new call can be accepted. The managing unit updates the total resource usage amount by subtracting a radio resource in response to the release of an existing call that radio resource allocation being not controlled at each transmission time interval. The managing unit manages the total resource usage amount without subtracting a radio resource in response to the release of an existing call that radio resource allocation being controlled at each transmission time interval.

Base station, upper node, radio communication system and radio communication method

Wireless base station equipment including a plurality of amplifiers and modulation and demodulation equipment having a monitoring control link with each of the plurality of amplifiers. The modulation and demodulation equipment terminates communications with the plurality of amplifiers and performs a monitoring control of each of the plurality of amplifiers. Each of the of amplifiers includes a plurality of cards as respective functional sections and a transmission and reception-integrated section that collects transmission and reception signals input to and output from each of the plurality of cards and terminates communication with the modulation and demodulation equipment. The modulation and demodulation equipment obtains, from a transmission and reception-integrated section of a corresponding amplifier via a monitoring control link with the corresponding amplifier, information related to the corresponding amplifier. The modulation and demodulation equipment performs the monitoring control based on the obtained information.

Wireless base station equipment and monitoring control method

A radio base stationincludes a call process controllerand a baseband processor. The call process controllernotifies the baseband processorof an offset of the baseband resource when accepting the priority call. The baseband processorchanges the baseband resource to be allocated to the normal call in a predetermined cycle and applies a resource use restriction based on the offset notified from the call process controller, the resource use restriction restricting the baseband resource to be allocated to the normal call within a range defined by subtracting the offset from a total baseband resource.

Radio base station and communication control method

The radio base station includes a monitoring controller for determining whether to switch between BB cards; and a baseband signal processor for transmitting a suspension request to suspend the transmission of the user data when it is determined that the BB cards are switched, and performing the handover of a processing between the BB cards based on the transmission of the suspension request. The baseband signal processor transmits a capacity allocation or a zero grant requesting to set the transmission rate of the user data to zero.

Radio base station, radio communication control system, and radio communication control method

Radio base station equipment is connected to radio transmitting/receiving equipment provided in sectors (S), into which a communication area is divided, by an optical fiber (), and performs radio communication with mobile terminals located in the respective sectors (S) via the radio transmitting/receiving equipment wherein a delay processing section delays a signal for each sector (S) according to a delay correction value obtained by subtracting a delay amount in each sector (S) from a maximum delay amount of a delay amount measured for each sector (S) and a baseband processing section obtains the signal from each sector (S) delayed by the delay processing section by setting a reception window at a position corresponding to the maximum delay amount.

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Yokohama, Japan

Hidehiko Oyane