US 7,457,612 B2
Wireless communication system and method of making wireless communication
Hideki Kurokawa, Tokyo (Japan); Takahiro Kakumaru, Tokyo (Japan); and Shinichi Morimoto, Tokyo (Japan)
Assigned to Nec Corporation, Tokyo (Japan)
Filed on Nov. 18, 2003, as Appl. No. 10/714,898.
Claims priority of application No. 2002-334203 (JP), filed on Nov. 18, 2002.
Prior Publication US 2004/0097268 A1, May 20, 2004
Int. Cl. H04L 12/58 (2006.01)
U.S. Cl. 455—412.1  [455/412.2; 455/413; 455/414.1; 455/414.2] 38 Claims
OG exemplary drawing
 
1. A wireless communication system including a radio-signal base station, and at least one mobile wireless terminal which operates in a power-saving mode in which said mobile wireless terminal intermittently receives packet signals, and in a normal mode in which said mobile wireless terminal regularly receives packet signals,
wherein when said radio-signal base station receives packet signals addressed to a mobile wireless terminal being in said power-saving mode, said radio-signal base station temporarily stores the received packet signals until said mobile wireless terminal requests said radio-signal base station to transmit said packet signals thereto, and
said mobile wireless terminal requests said radio-signal base station to transmit said packet signals thereto and transfers to said normal mode from said power-saving mode, if said mobile wireless terminal judges that the received packet signals are packet signals to be received in real-time communication, said mobile wireless terminal receives entirety of said packet signals in said normal mode, and said mobile wireless terminal transfers to said power-saving mode when said packet signals have been all received in real-time communication, and
wherein if said mobile wireless terminal judges that it would not be necessary to carry out real-time communication for receiving entirety of said packet signals, said mobile wireless terminal intermittently receives said packet signals at a certain interval in said power-saving mode.