초록 ▼

An apparatus and a method route information to a mobile unit in a data communications system having a home network and a remote network. Each of the home and remote networks supports one or more mobile units and one or more stationary access points. The mobile unit has a unique address and may roam

An apparatus and a method route information to a mobile unit in a data communications system having a home network and a remote network. Each of the home and remote networks supports one or more mobile units and one or more stationary access points. The mobile unit has a unique address and may roam from the home network to the remote network. The mobile unit associates with one access point which serves as a home agent. When the mobile unit roams and is away from its home network, the apparatus discovers a physical location of the mobile unit by sending an agent advertisement packet from the access point. If the location of the mobile unit is not at the home network, the apparatus associates the mobile unit with one of the access points on the foreign network which serves as a foreign agent. Next, the apparatus registers the mobile unit with the home agent, encapsulates original data received by the home agent which is destined for the mobile unit, forwards encapsulated data to the foreign agent, and converts the encapsulated data to the original data and delivers the original data to the mobile unit via the foreign agent.

대표청구항 ▼

An apparatus and a method route information to a mobile unit in a data communications system having a home network and a remote network. Each of the home and remote networks supports one or more mobile units and one or more stationary access points. The mobile unit has a unique address and may roam

An apparatus and a method route information to a mobile unit in a data communications system having a home network and a remote network. Each of the home and remote networks supports one or more mobile units and one or more stationary access points. The mobile unit has a unique address and may roam from the home network to the remote network. The mobile unit associates with one access point which serves as a home agent. When the mobile unit roams and is away from its home network, the apparatus discovers a physical location of the mobile unit by sending an agent advertisement packet from the access point. If the location of the mobile unit is not at the home network, the apparatus associates the mobile unit with one of the access points on the foreign network which serves as a foreign agent. Next, the apparatus registers the mobile unit with the home agent, encapsulates original data received by the home agent which is destined for the mobile unit, forwards encapsulated data to the foreign agent, and converts the encapsulated data to the original data and delivers the original data to the mobile unit via the foreign agent. ation when receiving a request to jump the optical pickup to another track in a CAV mode, to which the optical pickup is moving, and adjusting the data reading clock based upon the calculated reproduction speed of the target location before the optical pickup completes moving to the target location, the data reading clock being used to restore the detected signals into digital data. 20. The apparatus of claim 19, wherein the controller detects the current rotation speed of the optical disk, determines a slope and constant values of a linear function according to the detected current rotation speed, and calculates the reproduction speed of the target location by substituting a value of the target location into a variable of the determined linear function. 21. The apparatus of claim 20, wherein the value of the target location to be substituted into the determined linear function is expressed as time. 22. The apparatus of claim 19, wherein the controller calculates the current rotation speed based on information on a current location and a frequency of the data reading clock synchronized with the signals detected at the current location, determines a slope and constant values of a linear function according to the calculated current rotation speed, and calculates the reproduction speed of the target location by substituting a value of the target location into a variable of the determined linear function. 23. The apparatus of claim 22, the value of the target location to be substituted into the determined linear function is expressed as time. 24. A method for accessing tracks on an optical disk, comprising: driving the optical disk in a CAV mode; receiving a request to jump an optical pickup to another track; detecting a current reproduction speed based on a reading speed of data reproduced by the optical pickup when the request is received; determining a reproduction speed of a target location on the optical disk based on a linear function of reproduction speed between the current location and the target location; adjusting a data reading clock based on the determined reproduction speed during a movement of the optical pickup to the target location, the data reading clock being synchronized with a signal reproduced from the optical pickup; and processing the signal reproduced at the target location based on the adjusted data re