Patent Number: 6,167,269

Title: Terminal assisted handoff mobile communication system in which improvement is carried out as regards a handoff system

Abstract: In a fixed facility for a mobile communication system including a mobile terminal, the fixed facility covers a first and a second radio zone which are assigned with a first and a second radio frequency, respectively. The mobile terminal is communicable with the fixed facility by the use of, as a current radio frequency, one of the first and the second radio frequencies and is capable of producing a request signal representative of request of a handoff in which the mobile terminal is communicable with the fixed facility by the use of another of the first and the second radio frequencies at a boundary area between the first and the second radio zones. The fixed facility has a judging arrangement which is responsive to the request signal and judges whether or not the second radio frequency is usable by the mobile terminal. The fixed facility further has a signal transmitting arrangement transmits a command signal, relating to the handoff, towards the mobile terminal through the current radio frequency in response to a judgement result derived from the judging arrangement.

Inventors: Kondo; Seiji (Saitama, JP)

Assignee: NEC Corporation

International Classification: H04Q 7/38 (20060101); H04Q 007/20 ()

Expiration Date: 12/26/2013