摘要:
A mobile station, a base station, a mobile communication system and a communication method enabling operations associated with simultaneous uplink reception in multiple stations to be simplified are provided. The base station includes a transmission timing determining unit determining a transmission timing based on scheduling conducted upon a data transmission request from a mobile station and notifying the mobile station of the transmission timing, and a receiving unit receiving data in accordance with the transmission timing.
摘要:
A base station, for transmitting common information and control information, includes a common information generating unit that generates the control information and the common information, a lower-layer control information generating unit that generates first lower-layer control information indicating a radio resource where the control information is to be placed and second lower-layer control information indicating a radio resource where the common information is to be placed. The base station also includes a multiplexing unit that multiplexes the first lower-layer control information and the control information and multiplexes the second lower-layer control information and the common information, the system bandwidth being divided into a plurality of frequency blocks each corresponding to a minimum value of maximum transmission and reception bandwidths used by the plural mobile stations, and a transmitting unit that transmits the multiplexed first lower-layer control information, control information, second lower-layer control information, and common information.
摘要:
In a radio communication system, a user terminal transmits a reservation packet to a base station using a common control channel (1), and the base station assigns an uplink data channel to the user terminal according to the reservation packet, and assigns a first shared control channel (2b) to the user terminal in association with the uplink data channel, and the mobile station transmits a control signal to the base station using the associated uplink shared control channel. According to status of radio communication, the base station may assign beforehand a second uplink shared control channel (2a) for which occupation by the user terminal is permitted only while the user terminal is performing communication.
摘要:
A mobile terminal apparatus and radio base station apparatus supporting each of a plurality of mobile communication systems when the plurality of mobile communication systems coexists, where the mobile terminal apparatus performs a cell search using an SCH signal included in one downlink CC among a plurality of downlink CCs, and where the radio base station apparatus broadcasts a DBCH signal including information of an uplink CC paired with an initial downlink CC including the SCH signal obtained by the cell search, and transmits a response signal of an RACH signal from the mobile terminal apparatus to the mobile terminal apparatus in the initial downlink CC, and where the mobile terminal apparatus transmits a shared channel signal including information of a transmission/reception bandwidth of the mobile terminal apparatus to the radio base station apparatus in the uplink CC, and where the radio base station apparatus transmits a control signal including assignment information of a downlink CC and an uplink CC based on the information of the transmission and reception bandwidth of the mobile terminal apparatus to the mobile terminal apparatus, and where the radio base station apparatus and the mobile terminal apparatus communicate with each other in the downlink CC and the uplink CC based on the assignment information after random access.
摘要:
A base station apparatus in a radio communications system is disclosed. The base station apparatus communicates with a mobile station using an OFDM scheme in downlink. The base station apparatus includes a sync signal generating unit which generates a secondary sync channel; a multiplying unit which multiplies a scramble code with the secondary sync channel; and a transmitting unit which transmits the secondary sync channel with which the scramble code is multiplied. Cell-specific information is detected by the secondary sync channel.
摘要:
A transmission power control is disclosed, where the transmission power control includes transferring, from a second radio base station to a first radio base station, a second uplink signal received from a mobile station in a second cell, synthesizing, at the first radio base station, a first uplink signal received from the mobile station in a first cell with the second uplink signal transferred from the second radio base station, and generating and transmitting a transmission power control signal for controlling a transmission power of an uplink signal at the mobile station based on a reception quality of an uplink signal obtained by synthesizing the first uplink signal with the second uplink signal.
摘要:
An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters.
摘要:
A centralized-control base station connected to a first transceiving unit and a second transceiving unit includes a first signal quality obtaining unit configured to obtain both uplink signal quality from a mobile station to the first transceiving unit and downlink signal quality from the first transceiving unit to the mobile station; a second signal quality obtaining unit configured to obtain both uplink signal quality from the mobile station to the second transceiving unit and downlink signal quality from the second transceiving unit to the mobile station; and a control unit configured to allow downlink data to be transmitted from the first transceiving unit, downlink feedback information to be received by the second transceiving unit, uplink data to be received by the second transceiving unit, and uplink feedback information to be transmitted from the first transceiving unit, when the downlink signal quality from the first transceiving unit to the mobile station is better than the downlink signal quality from the second transceiving unit to the mobile station and the uplink signal quality from the mobile station to the second transceiving unit is better than the uplink signal quality from the mobile station to the first transceiving unit.
摘要:
A base station apparatus is disclosed for use in a mobile communication system including multiple cells having multiple sectors. The base station apparatus includes a synchronization channel generation unit configured to generate a synchronization channel for use in cell search by a user apparatus and a transmitting unit configured to wirelessly transmit a signal including the synchronization channel. The synchronization channel includes a primary synchronization channel and a secondary synchronization channel. The primary synchronization channel includes multiple types of sequences, and the secondary synchronization channel transmitted in a sector of a cell includes a code derived from a predefined generation polynomial equation corresponding to the primary synchronization channel.
摘要:
An apparatus for generating sets of radio parameters includes a first deriving unit deriving a set of radio parameters for specifying a symbol including an effective symbol part with the same period as the effective symbol part specified by another set of radio parameters and a guard interval part with a different period from the guard interval part specified by the other set of radio parameters. The apparatus further includes a second deriving unit deriving a set of radio parameters so that an occupancy proportion of the guard interval part in a single symbol specified by another set of radio parameters is equal to an occupancy proportion of the guard interval part in a single symbol specified by the other set of radio parameters.