摘要:
A base station device (10) performs communications with multiple mobile station devices (20) by the OFDMA scheme. The base station device (10) includes an intra-frame region specifying unit (16) configured to specify a region in a downlink frame to be specified by at least the sub-channel and a transmitter (13) configured to transmit MAP region information indicating the specified downlink intra-frame region. The intra-frame region specifying unit (16) specifies a region in a frame that is to contain communication data. The base station device (10) further includes a MAP generator (121) configured to generate MAP indicating the specified intra-frame region, and the transmitter (13) transmits a downlink frame containing the generated MAP in all or a part of the downlink intra-frame region specified by the MAP region information.
摘要:
Provided is a wireless communication system for performing communication using a shared control channel that can be used in a predetermined period for each of a plurality of base stations and a plurality of traffic channels that can be adaptively allocated to each of a plurality of wireless communication terminals. The wireless communication terminal is provided with a channel requesting unit that requests the base station to allocate an individual control channel through the shared control channel and a communication control unit that performs control information communication by wirelessly connecting the individual control channel allocated from the base station. The base station is provided with a channel allocating unit that allocates one of the traffic channels as the individual control channel to be exclusively used for the wireless communication terminal when the request of individual control channel allocation is received from the wireless communication terminal through the shared control channel.
摘要:
A multiservice is implemented by connecting one base station and one terminal via one wireless link.There is provided communication control means 2-1 that performs communication in compliance with an OFDMA scheme having traffic channels including first sub-channels for containing information showing enabled or disabled sub-channels and second sub-channels for storing data pertaining to services in correspondence with the first sub-channels, that allocates a plurality of first sub-channels to a plurality of services, respectively, and that connects one base station to one terminal via one wireless link, thereby establishing communication pertaining to the plurality of services.
摘要:
In a communication system of the OFDMA communication method, even when transmission data is decreased temporarily and then increased again while communication by a user terminal is in progress, the communication can be continued without lowering the communication throughput of the user terminal and the throughput corresponding to QoS can be provided to the user terminal. The OFDMA communication system for performing data communication using one or more subchannels between a base station (1) and a plurality of terminals includes a communication data amount acquisition unit that acquires a communication data amount and a channel allocation unit that allocates the subchannels according to the communication data amount. When the communication data amount has decreased, the channel allocation unit maintains allocation of at least one of the allocated subchannels.
摘要:
The present invention relates to a wireless communication system for TDMA communication with use of one or more communication channels among at least one of a plurality of cell stations and a wireless communication terminal. The wireless communication terminal includes a link-channel-allocation requesting unit that transmits a link-channel allocation request signal upon handover without specifying a destination cell station, using a handover control channel included in the communication channels which is used for transmitting control information concerning handover and has a unique channel number in the wireless communication system. The one of the cell stations includes a link-channel allocating unit that transmits, to the wireless communication terminal, a link-channel allocation signal including link-channel allocation information using the handover control channel upon receiving the link-channel allocation request signal.
摘要:
In a communication system of the OFDMA communication method, even when transmission data is decreased temporarily and then increased again while communication by a user terminal is in progress, the communication can be continued without lowering the communication throughput of the user terminal and the throughput corresponding to QoS can be provided to the user terminal. The OFDMA communication system for performing data communication using one or more subchannels between a base station (1) and a plurality of terminals includes a communication data amount acquisition unit that acquires a communication data amount and a channel allocation unit that allocates the subchannels according to the communication data amount. When the communication data amount has decreased, the channel allocation unit maintains allocation of at least one of the allocated subchannels.
摘要:
There is provided an OFDMA communication system capable of suppressing the communication resource reduction and reducing the processing load on a base station. The system includes a downlink frame generation unit (14) that generates a downlink frame for a downlink period for performing communication to at least one terminal (20) of a plurality of terminals from the base station (10), an uplink frame generation unit (24) that generates an uplink frame for an uplink period for performing communication to the base station (10) from at least one terminal (20) of the plurality of terminals, and a channel allocation unit that allocates, for one terminal of the plurality of terminals, one or more subchannels available in the one terminal, wherein the channel allocation unit notifies information of the allocated one or more available subchannels to the one terminal only by the downlink frame.
摘要:
Present invention provides a communication method and a communication system that can provide more detailed communication control, larger transmission capacity, and more flexible resource distribution to users in comparison with a communication method using a conventional frame format.There are provided a downlink frame generator 14 that generates a downlink frame for a downlink period in which a cell station 10 communicates with at least one personal station of the plurality of personal stations 20 in a predetermined frame format, and an uplink frame generator 24 that generates an uplink frame for an uplink period in which at least one personal station of the plurality of personal stations communicates with the cell station 10 in a predetermined frame format, wherein the frame format of the downlink frame includes a MAP field that notifies, in the downlink period, each personal station of information indicating an available or unavailable subchannel for each personal station.
摘要:
Each mobile station device (12) includes: a subchannel allocation refusal determining section (50), which determines a subchannel refused to be allocated from a base station device (10), based on a communication quality measured for each subchannel by a communication quality measuring section (44); an RMAP creating section (52), which creates refused channel information (RMAP information) indicating the subchannel determined to be refused to be allocated; and a transmitting section (54) which gives notice of the created RMAP information to the base station device (10). The base station device (10) includes: an RMAP acquiring section (26), which acquires the RMAP information noticed from the each mobile station device (12); and a subchannel allocating section (32), which determines whether to change a subchannel to be allocated to the each mobile station device (12), based on the acquired RMAP information and allocated channel information (MAP information) indicating the subchannel allocated to the each mobile station device (12).
摘要:
Improvement in utilization efficiency of traffic channels and voice quality in an OFDMA scheme is accomplished. A base station communicating which mobile stations by an OFDMA scheme using subchannels includes: a channel assigning unit 109a which assigns subchannels for communication to the mobile stations; and a call type acquiring unit 109b which acquires a type of a call as a communication object, wherein the channel assigning unit 109a changes a subchannel assignment procedure for assigning the subchannels to the mobile stations according to the acquired type of the call.