Patent ID: 8224328

Claim:
A mobile communication system comprising: a hand-over source base station which transmits data received from an upper level apparatus of said mobile communication system to a user equipment before performing a hand-over operation, transmits signal information including a permitted delay value when requesting the hand-over operation, and transmits a forwarding packet including data which is not transmitted to said user equipment and delay value identification information for specifying a delay value which represents a period of time being held in the hand-over source base station of said data while performing the hand-over operation; and a hand-over target base station which receives the signal information and accepts the hand-over operation, receives said forwarding packet transmitted by the hand-over source base station while performing the hand-over operation, and transmits said data to said user equipment so as not to exceed the predetermined permitted delay value with referring to said delay value identification information of the forwarding packet after completing the hand-over operation, wherein: said delay value identification information is a measured time value which is measured by said hand-over source base station for a time period from reception of said data from said upper level apparatus to transmission of said data from said hand-over source base station, and said hand-over target base station disposes data whose delay value exceeds said predetermined permitted delay value before transmitting to said user equipment.