Patent ID: 6289008
Filing Date: 2001-09-11
Classification: H04B,H04W

Abstract:
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;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;a plurality of line cards which accommodates transmission paths through the radio base station; anda control unit which receives a diversity hand-over instruction from a 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 cards to accommodate mobile station mobility, and a communication line card for accommodating a transmission path for the mobile station, andwherein 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, synchronizes packets from both said card 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; anda packet duplicating unit which receives a radio channel signal from said communication line card, transfers the radio channel signal to both said hand-over source line card and said hand-over destination line card, and communicates with the packet between said hand-over destination line card and said communication line card after terminating a diversity hand-over.