Patent ID: 8009633
Filing Date: 2011-08-30
Classification: G01C,H04L

Abstract:
1. A remote reproduction system for making communication between a transmitting apparatus and a mobile receiving apparatus, which are wirelessly connected to each other, for transmitting content data from the transmitting apparatus to the mobile receiving apparatus, and for reproducing the content data on the mobile receiving apparatus, the mobile receiving apparatus comprising: a position detecting device for detecting a current position of the mobile receiving apparatus and for providing position information which indicates the current position; a storing device for storing therein information of communication environments which indicates communication environments at a plurality of positions, the communication environments information comprising predetermined estimation data of the respective positions with regard to goodness or badness of receiving content data; an estimating device for estimating a communication condition between the transmitting apparatus and the mobile receiving apparatus at a future position of the mobile receiving apparatus in motion, on the basis of the position information and the communication environments information, the communication condition being estimated based on the predetermined estimation data; a control information transmitting device for transmitting control information necessary to change a transmission rate of the content data, to the transmitting apparatus, in accordance with the communication condition estimated by the estimating device; a data receiving device for receiving the content data from the transmitting apparatus; a buffering device for temporarily storing the content data received by the data receiving device; and a reproducing device for reproducing the content data stored in the buffering device, the transmitting apparatus comprising: a control information receiving device for receiving the control information from the mobile receiving apparatus; a rate changing device for changing the transmission rate on the basis of the control information received by the control information receiving device; and a data transmitting device for transmitting the content data to the mobile receiving apparatus, in accordance with the transmission rate changed by the rate changing device, wherein the estimating device comprises: a candidate position determining device for determining a plurality of candidate positions to which the mobile receiving apparatus will likely move in the future, on the basis of the position information and movement information; and a selecting device for examining the communication condition at each of the plurality of candidate positions, on the basis of the communication environments information, for selecting a candidate position whose communication condition is the worst, from the plurality of candidate positions, and for providing the communication condition at the selected candidate position as an estimation result.