摘要:
A mobile communication system comprises a base station and a relay station to relay data transmitted/received between the base station and a mobile station. The base station includes a first scheduler to perform scheduling of initial transmission of the data transmitted/received between the base station and the mobile station via the relay station, and a first manager to manage predetermined wireless resources which are periodically used, as wireless resources used for the initial transmission of the data. The relay station includes a second scheduler configured to perform scheduling of transmission of a message for confirming necessity of retransmission of the data and retransmission of the data and a second manager configured to manage wireless resources used for the transmission of the message and the retransmission of the data.
摘要:
A mobile communication system includes a base station, a mobile station, and a relay station. The mobile station includes a transmitter transmitting a random access request to the base station. The relay station includes a transmission information acquisition unit receiving a random access response from the base station and acquiring transmission information of a connection establishment request out of the random access response, and a relay report unit measuring a received state of the connection establishment request and transmitting relay information including the received state to the base station and the base station includes a comparison determinator comparing a received state of the connection establishment request measured by the base station with a measurement information of the received state in the received relay information and determining whether the relay station is used to relay radio communications with the mobile station.
摘要:
A mobile communication system comprises a base station and a relay station to relay data transmitted/received between the base station and a mobile station. The base station includes a first scheduler to perform scheduling of initial transmission of the data transmitted/received between the base station and the mobile station via the relay station, and a first manager to manage predetermined wireless resources which are periodically used, as wireless resources used for the initial transmission of the data. The relay station includes a second scheduler configured to perform scheduling of transmission of a message for confirming necessity of retransmission of the data and retransmission of the data and a second manager configured to manage wireless resources used for the transmission of the message and the retransmission of the data.
摘要:
A wireless base station apparatus includes a reporting unit which reports information on a first transmission area that allows transmission of a random access signal. Accordingly, the first transmission area is wholly reported to mobile station apparatuses within an area of the wireless base station apparatus. That is, both a mobile station apparatus in a non-handover state and a mobile station apparatus in a handover state receive the first transmission area information (report information) and use the first transmission area as a transmission area for transmitting a random access signal to the wireless base station apparatus. The wireless base station apparatus also has a notifying unit which notifies a second transmission area to a mobile station apparatus in a handover state, the second transmission area being different from the first transmission area reported by the reporting unit of the handover-destination wireless base station apparatus.
摘要:
To provide a method for suitably enabling the resources of a handover-source base station to be released and the post-handover processes of a handover-destination base station to be executed by securely determining a transfer of Last Packet without increasing a packet transmission delay in a handover process in a mobile communication system where a mobile station makes a communication with packets, a base station is provided with a Last Packet determination timer, and the handover source base station or the handover-destination base station activates the timer upon receipt of a handover completion acknowledgment transmitted from an upper node station or according to a resource release instruction after the reception of the handover completion acknowledgment, and determines that Last Packet has been received, upon expiration of the timer.
摘要:
A reordering method of sending packets, to which numbers indicating the packet order are added, to a mobile station from a base station, and rearranging the order of the packets at the mobile station, this includes forwarding from a source base station to a target base station, packets, not sent to the mobile station before a handover sequence, or packets, a confirmation response of proper reception has not been received from the mobile station, transmitting preferentially those packets from the target base station to the mobile base station and then transmitting packets received from a host station to the mobile station, giving packets information indicating that the packets are jump packets when transmitting the packets to the mobile station, received from the host station with the order jumped, deciding jump packets are not objects of reordering, and performing the reordering process for packets that are objects of reordering.
摘要:
A wireless communication system includes a relay station, first and second wireless base stations, a gateway device, and a mobile station. The gateway device is connected to the first and second wireless base stations by a cable. The first and second wireless base stations are interconnected by a cable. The relay station is connected wirelessly to the first wireless base station to perform relayed communication via the first wireless base station. When the mobile station at a lower level than the relay station executes handover to the second wireless base station, the first wireless base station switches a data transfer route by redirecting data which is not yet completely transmitted to the mobile station, to be forwarded to the second wireless base station.
摘要:
A mobile station apparatus, which is used in a mobile communication system including plural base stations, includes a receiver that receives a first signal from any one of the base stations of a first cell group covering a relatively large area and of a second cell group covering a relatively small area; a determining unit that determines an intermittent receiving cycle based on the received first signal; and a setting unit that, based on the determined intermittent receiving cycle, selects a cell group from among the first cell group and the second cell group, and sets the receiver to perform intermittent reception of a second signal transmitted from a base station belonging to the selected cell group.
摘要:
A radio communication system in which a first radio communication apparatus selects a transmission format from among a plurality of transmission formats to transmit data according to a selected transmission format and a second radio communication apparatus receives the data transmitted from the first radio communication apparatus. The first radio communication apparatus including a control signal generator to generate a control signal for notifying the second radio communication apparatus of a change of a trend of a transmission format to be applied and a radio transmitter to transmit the generated control signal. The second radio communication apparatus including a receiving processor which switches a candidate of receiving formats used for finding a receiving format to obtain a normal reception result based on the control signal.
摘要:
A communication apparatus that performs receiving processing of data transmitted at timings of a predetermined interval, the communication apparatus having a transmitting unit configured to transmit a signal indicating that a data is successfully received when the data transmitted at Mth timing according to the predetermined interval is successfully received and a control unit configured to perform a control for providing a period in which other receiving processing different from the receiving processing is at least performed or a receiving process is not performed until when next M+1th timing comes according to the predetermined interval after the transmission of the signal.