The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2003
Filed:
Sep. 03, 1998
Masanori Taketsugu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A transmission control method is provided which can improve a decrease in throughput when collision occurs during the use of a collision-based access system. In response to forward link message DA (I, ) from a radio base station , a terminal transmits a packet signal D ( ) while a terminal transmits a packet signal D ( ). When the packet signals collide head-on, the radio base station does not receive them but transmits forward link message D (I, ). When the terminals and receive the forward link message, they judge that the packet signals transmitted by themselves have collided head-on and then transfers to a back-off state in which random time transmission is sustained. When forward link message DA (I, ) is received from the radio base station , the terminal restored from the back-off state retransmits the packet signal D ( ). Meanwhile, the terminal is changed to a back-off state when receiving forward link message DA (P, ) from the radio base station . The terminal does not originally transmit a packet signal but retransmits the packet signal D ( ) because transmission request from the radio base station.