Ntt Docomo, Inc.

Nec Corporation

Mayu Yamada

Takehiro Nakamura

Masayuki Koshino

Sung Uk Moon

Minami Ishii

Masafumi Usuda

Akihito Hanaki

Hiroyuki Ishii

Masafumi Masuda

Akihiro Maebara

Takayuki Ishiguro

Seizo Onoe

Tomohiro Dohi

Toshiyuki Futakata

Yoshimasa Imamura

Naoto Itaba

The object of the present invention is to provide a radio access network system which can adapt to an environment in each network domain, and can carry out the priority transmission control of the IP packets in consideration of traffic requirements. The control apparatushas a priority information setter configured to set priority information for determining a priority of the packet to be transferred in a transfer path set in the network, and a packet processor configured to determine the priority of the received packet in accordance with the priority information, and to add the priority to the received packet.

Radio access network system, radio access method, and control apparatus

In a mobile communication system, the information on a downlink DCH actually not used is regarded as removable from the construction target of a TFI and a TFCI, so that a discrepancy of the perception regarding the TFI and the TFCI is not occurred between a base station and a UE (User Equipment). An indicator information in terms of an 'Unidirectional DCH Indicator' is generated in an Indicator processing portion of a RNC so that the base station can remove the information regarding the downlink DCH actually not used from the construction target of the TFI and the TFCI, and the information, which is included in the NBAP message, is transmitted to the base station from the NBAP message composition portion. When, at the NBAP message analyzing portion of the base station, it is determined that the 'Unidirectional DCH Indicator' is included in this message, the information regarding the downlink DCH actually not used in a TFCI construction portion is removed from the construction target of the TFI and the TFCI.

Mobile communication system and control method thereof and radio network controller and base station used for the same

A mobile communication system includes an extension transmission/reception server configured to transmit/receive user data transmitted/received between mobile stations to/from a base station by using an extension transmission/reception transmitting/receiving the data within a radio access network, and the base station configured to transmit/receive the user data to/from the extension transmission/reception server.

Mobile communication system, extension transmission/reception server, extension transmission/reception controller, base station, radio network controller, mobile station and communication method

There is provided a control device enabling switching of communication of a mobile terminal with one system to communication with another system while reducing power consumption and workload of the mobile terminal. The control device is used in a communication system including a first mobile communication system, a second mobile communication system, and a mobile terminal being in communication with the first mobile communication system. The control device comprises a position measuring unit for measuring the position of the mobile terminal, a judgment unit for making a determination whether or not to switch the communication of the mobile terminal from the first mobile communication system to the second mobile communication system according to a position measurement result of the position measuring unit, and a switching unit for performing the above switching operation according to the determination of the judgment unit.

Control device of mobile communication system

A mobile communication system comprises: a determination unit configured to determine as to layers of data to be transmitted by base stations to mobile stations for respective radio areas, based on area resource information concerning radio resources for the respective radio areas covered by the base stations; and a radio transmitter configured to transmit the data to the mobile stations according to a determination of the determination unit.

Mobile communication system, radio network controller, base station and communication method

The object of the present invention is provide a mobile communication system which can improve a communication quality of the mobile communication system as a whole by changing a transmission method for transmitting common information. Each of the mobile stationstocomprises a communication quality measurerconfigured to measure a communication quality of a signal transmitted from the radio station. The radio stationcomprises a communication quality acquirerconfigured to acquire the communication quality from the plurality of mobile stationsto; a transmission method changerconfigured to change a transmission method for at least one of an error encoding rate, the number of repeated bits, an interleave length, the number of multiple codes and the number of transmission signal repetitions, in accordance with the acquired communication quality; and a transmitterconfigured to transmit the signal to the plurality of mobile stationstousing the changed transmission method.

Mobile communication system, mobile communication method, and radio station suitably used for the same

A mobile communication system includes a first base station configured to be controlled by a first radio network controller, and provide an address of an extension transmission/reception device to user data received from a first mobile station, and the extension transmission/reception device configured to be controlled by the first radio network controller or a different second radio network controller, and provide an address of a second base station, which is controlled by the second radio network controller, to user data received from the first base station.

Mobile communication system, extension transmission/reception device, base station, radio network controller and mobile station

The object of the present invention is to provide a communication system which makes it possible to avoid a control load from being generated while effectively utilizing the reception capabilities of mobile stations. The communication system includes a category managerconfigured to categorize reception capability values showing reception capabilities necessary for receiving multicast data in the mobile stations, a reception capability collectorconfigured to collect the reception capability values of the mobile stations, a deciderconfigured to decide a hierarchical structure of the multicast data from a plurality of categories corresponding to the collected reception capability values of the mobile stations and a transmitterconfigured to transmit the multicast data using the decided hierarchical structure.

Communication system, communication method and mobile station

An apparatus and method prevent an out-of-sync state of clocks from occurring in an IP network or an IP-based radio access network in which network fluctuation delays occur. A synchronous server includes a clock generator configured to periodically generate a clock and a synchronous message transmitter configured to generate a synchronous message for notifying information regarding the generated clock, and to transmit the generated synchronous message to the node using an IP packet. The node includes a time calculator configured to obtain a time of receiving the synchronous message and a clock correction processor configured to calculate a clock correction value in accordance with the time of receiving the synchronous message and the information regarding the clock notified by the synchronous message, and to correct a generated timing of a clock in the node in accordance with the clock correction value.

Radio access network system, radio communication method, synchronous server and node

The present invention includes a RAN connection receiving section, an IP packet processing section, and a local content server. The RAN connection receiving section receives content request information from a mobile terminal. When a RAN identifier and an IP address included in the content request information are identified in a set table based on the content request information received by the RAN connection receiving section, the IP packet processing section transfers the content request information to the identified IP address. The local content server delivers content information corresponding with to the content request information to the mobile terminal.

Relay apparatus, method of controlling content delivery, and content delivery system

The object of the present invention is to provide a radio access network system for properly distributing loads and functions of the control plane function and a user plane function of a control apparatus, thus enabling the addition of only a necessary function when a radio access network is expanded. The radio access network system comprises a control serverconfigured to manage a configuration of a radio access network including a base station, and to set a transfer path for a packet in accordance with the configuration, and a data serverconfigured to manage a resource of a base stationlocated in the transfer path set by the control server

Radio access network system, radio communication method, control server and data server

An object of the present invention is to provide a resource allocation control device, resource allocation control method and a mobile communication system, which can sufficiently decrease the control load and the delay when a RAN and IP network are connected. The mobile communication system is comprised of the RAN and the IP network which are connected via the resource allocation control device. The RAN is comprised of a plurality of BTSs and BSCs where MS can be connected, and the IP network has an IP transfer device. The resource allocation control device which intervenes between the RAN and the IP network, comprises a request acceptance section, correspondence processing section, allocation data base and allocation/assignment processing section, which are sequentially connected, and each of the BSC and the IP transfer device is connected to the request acceptance section and to the allocation/assignment processing section.

Resource allocation control device, resource allocation control method, and mobile communication system

A receiver of a mobile station or a base station in radio communications is formed by a correlation unit for generating a delay profile for specifying paths by taking correlations by using replica signals for a received pilot signal, and a path selection unit for comparing a power level of each path in the delay profile with a threshold determined according to an index value regarding a communication state, selecting paths for which a comparison result satisfies a prescribed condition as valid paths, and outputting a selected delay profile formed by the valid paths as a channel estimation value.

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Yokohama, Japan

Mayu Yamada