Abstract: Disclosed is a method for selecting a communication network by a wireless terminal, the method including receiving a signal having a predetermined reception power level from one or more communication networks, and calculating a guaranteed data rate of each of said one or more communication networks by using the predetermined reception power level of the signal; comparing the calculated guaranteed datarate with a minimum guaranteed datarate; and calculating a selection factor value of each of said one or more communication networks by using the guaranteed datarate when all guaranteed datarate of said one or more communication networks are equal to or greater than the minimum guaranteed datarate, and selecting a communication network having a lowest selection factor value.

Abstract: Disclosed is a method for selecting a communication network by a wireless terminal, the method including receiving a signal having a predetermined reception power level from one or more communication networks, and calculating a guaranteed data rate of each of said one or more communication networks by using the predetermined reception power level of the signal; comparing the calculated guaranteed datarate with a minimum guaranteed datarate; and calculating a selection factor value of each of said one or more communication networks by using the guaranteed datarate when all guaranteed datarate of said one or more communication networks are equal to or greater than the minimum guaranteed datarate, and selecting a communication network having a lowest selection factor value.

Abstract: Provided are a wire/wireless communication system, and a method for providing multimedia service therein. The system includes a multimedia service server connecting with a mobile communication network and a wire network, and providing contents data through the wire network in response to a request for contents through the mobile communication network; a home Du connecting with the wire network, storing the contents data provided through the wire network, and providing the contents data to a terminal of a home area; and the terminal for requesting the multimedia service server for multimedia service through the mobile communication network, and receiving the contents data from the home Du.

Abstract: Disclosed are an adaptive queue mechanism for an efficient realtime packet transfer and an adaptive queue establishment system thereof. The adaptive queue establishment system adds or deletes classes and/or filters using a system call from a user mode to a kernel mode. The adaptive queue mechanism includes a default priority queue corresponding to a default class, dynamic priority queues dynamically generated corresponding to at least one dynamic class, filters having filtering information established corresponding to the designated dynamic classes and dynamically generated to interwork with the designated dynamic classes, and a classifier for classifying the classes for packets using the filters.

Abstract: Disclosed is a data processing method of a kernel area according to a command of a user in a data processing system having a kernel mode used as an operation mode of the kernel area and a user mode used as an operation mode of an user area. The data processing method includes the steps of extracting data to be processed from a data storage part in response to the command of the user in the kernel mode if a predetermined data process command occurs in the user mode by the command of the user; storing the data to be processed in a kernel buffer; transferring basic information of the data to be processed to the user mode; creating a second data processing function corresponding to a first data processing function using the basic information in the kernel mode if the first data processing function using the basic information is initiated in the user mode; and processing the data to be processed by using the data processing function.