Switching center for mobile handover
View Patent ↗In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communication, frames are received to be identified by a mobile switching center. The frames contain the same data received from both base stations covering the cell range at asynchronous timing different from each other. A selection is made of header information with the lowest error rate from the header information of these frames. The frames are connected at instructed timing. Also, the frames to be transmitted to a plurality of base stations are duplicated, and then transmission timing is specified from these header information. These duplicated frames are transmitted at the specified transmission timing, so that the non-instantaneous interrupt handover is carried out.
1. A mobile switching center connected to a plurality of base stations communicating with a mobile wireless station, for processing packets, said mobile switching center comprising:
a receiver unit which receives packets via said plurality of base stations from said mobile wireless station, said receiver unit attaching a common connection number to said received packets based on a channel number attached to said packets by said base stations;
a buffer unit which temporarily stores said packet received at said receiver unit for synchronization to be taken among said packets in said buffer; and
a selector unit which selects a packet having a better condition among said plurality of packets stored in said buffer unit.
2. A packet communication apparatus as claimed in claim 1 , wherein each of said packets includes information indicating transmission information order and wherein said selector unit selects a packet having a better condition from said asynchronous frames having the same transmission order.
3. A packet communication apparatus as claimed in claim 2 , wherein a packet not selected by said selector unit is discarded.
4. A packet communication apparatus as claimed in claim 1 , wherein a packet nor selected by said selector unit is discarded.