Ntt Docomo, Inc.

Other

Nit Docomo, Inc.

Mikio Iwamura

Minami Ishii

Wuri Andarmawanti Hapsari

Anil Umesh

Hideaki Takahashi

Takehiro Nakamura

Hiroyuki Ishii

Yoshihiro Ishikawa

Takahiro Hayashi

Yasuhiro Kato

Alf Zugenmaier

Hiroaki Yamagishi

Sadayuki Abeta

Masashi Kanauchi

Itsuma Tanaka

Kazunori Obata

Akira Yamada

Kenichiro Aoyagi

Tetsushi Abe

Seizo Onoe

Atsushi Harada

Yoshiaki Ofuji

Yasufumi Morioka

Takeshi Nakamori

Satoshi Nagata

Tooru Uchino

Shogo Yabuki

Junichiro Hagiwara

Shinichi Mori

Katsutoshi Kusume

Lan Chen

Liang Hu

Tadashi Uchiyama

Seigo Harano

Mutsumi Ishimoto

Patrick Agyapong

Emmanuel Ternon

Nobuhiko Miki

Yukihiko Okumura

Keisuke Suzuki

Lei Du

Akira Ishii

Takeshi Okamoto

Katsutoshi Nishida

Masafumi Masuda

Masayuki Motegi

Naoto Ookubo

Kengo Yagyu

Yoshitsugu Shimazu

Tetsuro Imai

Yoshihisa Kishiyama

Kazuaki Takeda

Liu Liu

Fusao Ishii

Takaaki Sato

Xiaoming She

Yuichiro Nakamura

Naoto Okubo

Takashi Koshimizu

Yixue Lei

Akihiro Maebara

Hidehiro Ando

Hideyuki Matsutani

Kota Fujimura

Mikiko Nakanishi

Kazuoki Ichikawa

Hideyuki Sakuramoto

Petra Weitkemper

Takuya Takimoto

Ivan Cosovic

Kazuya Nomura

Umesh Kadaba Anil

Yoshiaki Oofuji

Hideaki Takahashii

Jamal Bazzi

A projection display having an optical light guide for a see-though display system using holographic optical element or diffractive optical element as in-coupling optics and combined with Fresnel mirrors as out-coupling optics is disclosed. A display using this light guide enables a wide angle (e.g., over 90 degrees field of view), high resolution, and a large eye-box with a compact size.

Optics of a display using an optical light guide

A mobile station UE includes a measurement unitconfigured to measure radio quality of a cell during communication or a neighboring cell for each of the two or more carriers, a determination unitconfigured to determine whether to notify the radio base station eNB of a measurement result regarding each of the two or more carriers in the measurement unitand a transmission unitconfigured to transmit the measurement result in the measurement unitto the radio base station eNB, wherein the transmission unittransmits, in addition to the measurement result regarding a carrier in which it is determined by the determination unitto notify the radio base station eNB of the measurement result in the measurement unita measurement result regarding a carrier other than the carrier.

Mobile station, radio base station, and communication control method

How to apply an Alamouti like space-time coding (or transmit diversity) to a Filter Bank Multicarrier (FBMC) transmission using Offset QAM (OQAM). In FBMC, due to the orthogonality in the real domain only, an intrinsic interference results thereof for the imaginary component. Simply adapting the Alamouti scheme to FBMC OQAM is not obvious since the intrinsic interference terms are not equivalent at each antenna since it depends on the surrounding symbols. The application proposes to use a precoding symbol chosen to cancel out (zero) the intrinsic interference individually for each antenna, ie a code rate of 1/2 (sending one data symbol requires two time units). A more elaborated embodiment proposes to choose the contiguous precoding symbols such that a virtual QAM Alamouti scheme is achieved, without rate loss.

Transmit diversity from orthogonal design for FBMC/OQAM

A method is described for controlling a small cell base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method includes taking, by a small cell base station, a measurement for obtaining information describing a vicinity around the small cell base station and reporting the information from the small cell base station to the macro base station.

Macro-cell assisted small cell discovery and resource activation

A method is described for controlling a user equipment to be served by a small cell base station in a wireless communication system including a plurality of small cell base stations controlled by a macro base station. The method includes signaling, by the small cell base station, the small cell base station capabilities to the macro base station; signaling, by the user equipment, the user equipment capabilities to the macro base station; and signaling, by the macro base station, a small cell base station configuration to the user equipment.

A method is described for controlling a small cell base station and a user equipment to be served by the small base station in a wireless communication system having a plurality of small cell base stations controlled by a macro base station. The method has, in response to a request from the macro base station to the small cell base station, performing, by the small cell base station, a beacon transmission on one or more resources, in response to a request from the macro base station to the user equipment, performing, by the user equipment, a channel quality measurement on the one or more resources, and reporting the measured channel quality from the user equipment to the macro base station.

Macro cell assisted small cell discovery and resource activation

To further notify the amount of data retained in the transmission buffer used in a communication among a plurality of MOBILE STATIONs to a RADIO BASE STATION, the mobile communication method according to the present invention includes: transmitting, with a MOBILE STATION (UE#), a BSR (#) indicating the amount of data retained in a transmission buffer corresponding to a logical channel in a Uu interface to a RADIO BASE STATION (eNB); transmitting, with a MOBILE STATION (UE), a BSR (#) indicating the amount of data retained in a transmission buffer corresponding to a logical channel in a Ud interface to the RADIO BASE STATION (eNB); and distinguishing, with the RADIO BASE STATION (eNB), the BSR (#) from the BSR (#) based on predetermined information included in the received BSR.

Mobile communication method, radio base station, and mobile station

A mobile communication method involving performing, at a mobile station UE which establishes a first connection in a first cell, a cell selection process at the time of detecting a failure in the first connection, transmitting, from the mobile station UE to a second cell selected in the cell selection process, a connection re-establishment request signal, determining, at a radio base station that manages the second cell, whether or not to store context information of the mobile station UE in response to the connection re-establishment request signal, acquiring, at the radio base station, the context information of the mobile station UE from a radio base station that manages the first cell, when determining that the context information of the mobile station UE is not stored, and establishing a second connection in the second cell for the mobile station UE, based on the context information of the mobile station UE.

Mobile communication method and radio base station

When a network is requiring access barring, a mobile device determines whether a reference value broadcasted to the mobile device indicates a value determining that an access is denied regardless of a numerical value generated by the mobile device, or indicates a value having a possibility that an access of a certain mobile device is denied while an access of another mobile device is allowed. In the latter case, the mobile device determines appropriateness of an access by performing predetermined processing using the reference value as a value to be checked for a relationship with a numerical value generated by the mobile device when the mobile device does not have a special type access class, and uses a value enabling allowance of an access without performing the predetermined processing as a value for determining appropriateness of an access when the mobile device has the special type access class.

Method of barring network access, mobile device and processor

Transmission/reception timing of a data signal and a control signal through a Uu interface and transmission/reception timing of the data signal through a Ud interface are properly adjusted. A mobile communication method according to the present invention includes: a step A in which a radio base station eNB notifies a mobile station UE#and a mobile station UE#that an opportunity to transmit and receive the data signal through the Ud interface is allocated through a PDCCH in which an X-RNTI is used; and a step B in which the radio base station eNB transmit 'direction information', for notifying of a direction in which the data signal should be transmitted in the opportunity, to the mobile station UE#and the mobile station UE#

Orthogonality between signals is maintained in direct communication between a mobile station UE#and a mobile station UE#. In a mobile communication system according to the present invention, a radio base station eNB is configured to transmit a data signal to the UE#and the UE#through a Uu interface at a frequency f, the UE#and the UE#are configured to transmit the data signal to the radio base station eNB through the Uu interface at a frequency F, the UE#and the UE#are configured to transmit and receive the data signal to and from each other in a time-division manner through a Ud interface at the frequency F, and predetermined gaps are configured to be provided before and after timing in which the UE#and the UE#transmit the data signal through the Ud interface.

Mobile communication system

The present invention is a mobile communication system having a mobile station UE, in which CA is performed, configured to transmit an uplink data signal to a radio base station eNB, by using a plurality of 'Component Carriers' having different carrier frequencies, and the mobile communication system includes TA timer management unitsandconfigured to manage the TA timer corresponding to the plurality of 'Component Carriers'; and state management unitsandconfigured to manage the state of the plurality of &#x201c;Component Carriers&#x201d;, and the state management unitsandare configured to set the state of a &#x201c;Component Carrier&#x201d;, whose TA timer has expired, to an asynchronous state.

Mobile communication system, radio base station, and mobile station

A user apparatus including at least operation modes of a connection mode and an idle mode, includes: a measurement unit that measures radio quality in the idle mode according to measurement target information (Config#m, Config#n) indicating that the user apparatus is set beforehand to report a measurement value of radio quality to a management node; a storage unit that stores the measurement target information and the measurement value of radio quality measured by the measurement unit; and a transmission unit that transmits, in the connection mode, an indicator indicating that there is the measurement value of radio quality to the management node, and transmits a report signal including the measurement value of radio quality to the management node according to a request from the management node, wherein, when the user apparatus obtains new measurement target information (Config#n), the storage unit stores the new measurement target information according to a predetermined updating rule (reconfiguration model).

User apparatus and method in mobile communication system

The present invention relates to a mobile communication method of sending and receiving the signaling of an S1AP/X2AP layer on DRB established between a radio base station DeNB and a relay node RN, the method comprising a step of generating a key Kfor performing integrity protection in the above DRB, in an SMC (security mode command) process performed in an attach process of the relay node RN.

Mobile communication method, relay node, and radio base station

A communication control device includes a parameter acquisition unit which acquires a first parameter determined on the basis of the number of mobile stations connected to the first cell or the number of mobile stations connected to the second cell, a parameter determination unit which changes the number of mobile stations connectable to the first cell or the number of mobile stations connectable to the second cell on the basis of the first parameter, and a parameter notification unit which notifies at least any one of the first base station and the second base station of the determined second parameter.

Communication control device and communication control method

Growing community of inventors

Tokyo, Japan

Mikio Iwamura