Abstract: The present invention relates to a method and apparatus for adaptive data transmission enabling data transmission in a variable transmission rate in a communication system, where a number of users share a transmission medium to transmit data in the variable transmission rate, by using a transmission capacity which is not being currently used even if allocated to some users. According to the invention, the transmission rate variation rates of each of the variable transmission rate data transmission services are controlled within the spirit of current variable transmission rate services so that the data traffic of the existing variable transmission rate transmission services which is actually unable to be forecasted can be forecasted. Therefore, the idle transmission capacity available can be forecasted so that the data can be transmitted by using the idle capacity. In this way, the transmission capacity of the system can be more efficiently used.

Abstract: The present invention relates to a method and apparatus for adaptive data transmission enabling data transmission in a variable transmission rate in a communication system, where a number of users share a transmission medium to transmit data in the variable transmission rate, by using a transmission capacity which is not being currently used even if allocated to some users. According to the invention, the transmission rate variation rates of each of the variable transmission rate data transmission services are controlled within the spirit of current variable transmission rate services so that the data traffic of the existing variable transmission rate transmission services which is actually unable to be forecasted can be forecasted. Therefore, the idle transmission capacity available can be forecasted so that the data can be transmitted by using the idle capacity. In this way, the transmission capacity of the system can be more efficiently used.

Abstract: Disclosed are methods for collecting information and providing an information service based on locational and geographical information as well as to a recording medium containing a program readable by a computer for realizing the methods thereof. The methods according to the invention include the steps of: receiving information on a subscriber collected according to a request for a service provision including information on a current location and a version of a currently designated map leaf and according to a predetermined condition; confirming whether or not the version of the current map is an updated version by using the received locational information and information on boundaries of each map leaf established in a geographical information database; and transmitting information on a request for a service provision depending on whether or not the version of the map leaf is an updated one.