摘要:
A first frame counter generates a position signal for an input subframe address which is synchronized with an input clock signal based on an input frame phase signal. The first frame counter also generates a write address enabling signal. A subframe type detector generates a write/read control signal based on an input frame signal. Depending upon the position signal for the input subframe address, the write address enabling signal and the write/read control signal, a first subframe phase synchronization device and a second to nth subframe phase synchronization device control a buffer corresponding to 1/m of a frame data amount by a write address, where m (n>=m) is a multiplexing number. The first subframe phase synchronization device and the second to mth subframe phase synchronization device writes data corresponding to a first to mth input subframe signal based on the input frame signal into a buffer respectively. An input relative phase is synchronized with a standard relative phase. The synchronized signal is output as a synchronized frame signal.
摘要:
A handover-source base station transfers a data packet destined to a mobile device received from a base station control device to a handover-destination base station as an inter-base-station transfer packet during a stopping period for which the handover-source base station stops a wireless transmission of a data packet to the mobile device. The handover-destination base station calculates a wireless transmission priority for the inter-base-station transfer packet based on a station retention time in the handover-destination base station and an estimated value of a retention time in the handover-source base station.
摘要:
A handover-source base station transfers a data packet destined to a mobile device received from a base station control device to a handover-destination base station as an inter-base-station transfer packet during a stopping period for which the handover-source base station stops a wireless transmission of a data packet to the mobile device. The handover-destination base station calculates a wireless transmission priority for the inter-base-station transfer packet based on a station retention time in the handover-destination base station and an estimated value of a retention time in the handover-source base station.
摘要:
A packet storage unit stores therein a data packet and an inter-base-station transfer packet assigned with sequence numbers. When the inter-base-station transfer packet is stored in the packet storage unit, a packet reading unit reads the inter-base-station transfer packet in order of the sequence number, and then reads the data packet in order of receiving the data packet. A packet transmitting unit transmits the inter-base-station transfer packet and the data packet read by the packet reading unit to a destination mobile terminal. The packet reading unit determines whether all inter-base-station transfer packets are read based on the sequence numbers.