Communication system

A packet communication apparatus for accommodating packets from a radio terminal through a radio base station and packets to be transmitted to the radio terminal through the radio base station, comprising:

• a plurality of input ports;
• a plurality of output ports;
• a switch which allocates inputted packets from said respective input ports to said output ports depending on header information of the inputted packets;
• and
• a diversity hand-over processing trunk, connected to a succeeding stage of said switch, which performs a diversity hand-over of the packets to be transmitted to and received from the radio terminal,
• wherein said diversity hand-over processing trunk includes a packet processing unit provided on allocation portions for allocating the packets from said communication line card to two or more paths, the packet processing unit deciding a packet output destination by collating a header conversion table to transfer the packet to a plurality of output paths.

A packet communication apparatus for accommodating packets from a radio terminal through a radio base station and packets to be transmitted to the radio terminal through the radio base station, comprising:

• a plurality of input ports;
• a plurality of output ports;
• a switch which allocates inputted packets from said respective input ports to said output ports depending on header information of the inputted packets;
• and
• a diversity hand-over processing trunk, connected to a succeeding stage of said switch, which performs a diversity hand-over of the packets to be transmitted to and received from the radio terminal,
• wherein said diversity hand-over processing trunk provides queue groups each having two or more queues to store in-coming packets, allocates the packets from both a hand-over source line card and a hand-over destination line card to the queues, each of which is a different queue in an identical queue group, synchronizes with the queues at a synchronous circuit arranged on the succeeding stage of said switch, selects the packet in accordance with a predetermined selection algorithm at a selection circuit arranged on the succeeding stage of said synchronous circuit, and converts a header of the packet to be transmitted to a packet switch such that the packet is transferred to a hand-over destination line card.

A packet communication apparatus including a plurality of input/output ports and a switch for allocating inputted packets from the respective input ports to the output ports depending on header information of the inputted packet, the switch having a multicast function and accommodating radio channel signals come from a radio base station, said packet communication apparatus comprising:

• a plurality of line cards which accommodate transmission paths through the radio base station;
• and
• a control unit which receives a diversity hand-over instruction from the mobile station through the radio base station,
• wherein said plurality of line cards include at least a hand-over source line card already accommodating the mobile station, a hand-over destination line card to accommodate mobile station mobility, and a communication line card, for accommodating a transmission path for the mobile station,
• wherein said diversity hand-over processing trunk includes a synchronous selection unit, responsive to said control unit, which receives a signal from said hand-over source line card and a signal from said hand-over destination line card synchronizing with the packets coming from both said hand-over source line card and said hand-over destination line card, and selects a packet therefrom to be transferred to said communication line card, and
• wherein signals arriving at said communication line card are transferred to said hand-over source line card and said hand-over destination line card by using a multicast function to carry out a diversity hand-over.