Ntt Docomo, Inc.

Mitsubishi Electric Corporation

Tatsuro Yajima

Hidehiko Oyane

Akihito Hanaki

Hideaki Takahashi

Daisuke Tanigawa

Wuri Andarmawanti Hapsari

Kenichiro Aoyagi

Noriyuki Fukui

Yuta Sagae

Yoshiaki Ofuji

Masahiro Fujii

Kohei Kiyoshima

Tetsuya Mishuku

Yoshitsugu Shimazu

Takuto Arai

Hidekazu Shimodaira

Takashi Kosugi

A FrontHaul Multiplexer (FHM) for relaying communications between a signal processing device and a plurality of radio devices includes a storage unit that stores a table in which device identification information of each of the plurality of radio devices is associated with beam identification information assigned to the radio device; a scheduling information reception unit that receives, from the signal processing device, scheduling information of a user terminal performing radio communications with the plurality of radio devices; a determination unit that acquires from the table the device identification information associated with the beam identification information of uplink included in the scheduling information and then determines from the acquired device identification information the radio device in charge of the user terminal; and a transmission unit that transmits to the signal processing device an uplink signal transmitted from the determined radio device.

Signal processing device, radio device, front haul multiplexer, beam control method, and signal combining method

A signal load onto a mobility management node MME is reduced by defining a case which does not require 'Path Switch' when X2 handover processing is performed for a mobile station UE. A radio base station eNB#according to the present invention includes a handover processing unitconfigured not to perform 'Path Switch' when performing X2 handover processing for a mobile station to a radio base station eNB#having the same &#x201c;Virtual eNB ID#as the radio base station eNB#

Radio base station

Provided are a radio communication system, a radio base station and a communication method which enable an inter base-station handover while reducing a processing load on a core network. An eNBsends a handover request which requests an inter base-station handover of a UEfrom the eNBto an eNBvia an inter base-station transmission path. The eNBreceives the handover request from the eNB, and completes the handover of the UEfrom the eNBto the eNBby using a communication path to the UEvia a highway between an MMEand the eNBand the inter base-station transmission path.

Radio communication system, radio base station and communication method

A mobile communication method includes: a step of transmitting, by a radio base station eNB#, 'Forwarding Request' on downlink user data addressed to a mobile station UE to a radio base station eNB#; a step of switching, in response to the 'Forwarding Request', by the radio base station eNB#, a forwarding destination of the downlink user data addressed to the mobile station UE from the radio base station eNB#to the radio base station eNB#; and a step of transmitting, by the radio base station eNB#, the downlink user data addressed to the mobile station UE to the mobile station UE.

Mobile communication 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.

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 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.

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Kawasaki, Japan

Tatsuro Yajima