Abstract: According to the present invention, back-off slots and collisions in a competition by means of a DCF can be significantly reduced, and a throughput higher than existing DCFs can be provided. Also, overhead due to additional control messages is eliminated by reverse order implied information operating in a distributed manner in terminals, and communication with existing terminals is enabled even in a wireless network using Aps or the DCF.

Abstract: According to the present invention, collision and a back-off slot in a competition by means of DCF can be significantly reduced, and a throughput higher than conventional DCFs can be provided. Also, overhead due to additional control messages is eliminated by reverse order implied information operating in a distributed manner in terminals, and communication with conventional terminals is enabled even in a wireless network using Aps or the DCF.

Abstract: Provided is a node probing method using an adaptive and asynchronous rendezvous protocol in an opportunistic network. The node probing method includes: selecting, by each of nodes in the opportunistic network, a prime number larger than two; using, by the node, the selected prime number to generate a wake-up pattern according to the following equation: x n = { 1 , if n ? 0 ? ( mod ? ? p ) ? ? or n ? 1 ? ( mod ? ? p + 1 ) 0 , others where Xn=1 represents a wake-up slot, Xn=0 represents a sleeping slot, and ‘mod p’ represents a modulo operation for the prime number p); and searching, by the node, for a neighbor node according to the generated wake-up pattern.

Abstract: According to the present invention, back-off slots and collisions in a competition by means of a DCF can be significantly reduced, and a throughput higher than existing DCFs can be provided. Also, overhead due to additional control messages is eliminated by reverse order implied information operating in a distributed manner in terminals, and communication with existing terminals is enabled even in a wireless network using Aps or the DCF.

Abstract: According to the present invention, collision and a back-off slot in a competition by means of DCF can be significantly reduced, and a throughput higher than conventional DCFs can be provided. Also, overhead due to additional control messages is eliminated by reverse order implied information operating in a distributed manner in terminals, and communication with conventional terminals is enabled even in a wireless network using Aps or the DCF.

Abstract: Provided is a node probing method using an adaptive and asynchronous rendezvous protocol in an opportunistic network. The node probing method includes: selecting, by each of nodes in the opportunistic network, a prime number larger than two; using, by the node, the selected prime number to generate a wake-up pattern according to the following equation: x n = { 1 , if n ? 0 ? ( mod ? ? p ) ? ? or n ? 1 ? ( mod ? ? p + 1 ) 0 , others where Xn=1 represents a wake-up slot, Xn=0 represents a sleeping slot, and ‘mod p’ represents a modulo operation for the prime number p); and searching, by the node, for a neighbor node according to the generated wake-up pattern.

Abstract: Provided is distributed medium access scheduling with implicit ordering (DSIO). The DISO includes the steps of: (a) when any terminal of a plurality of terminals included in a terminal group has data to transmit, promoting the terminal to a transmission data existence layer; (b) when any blue terminal of a plurality of blue terminals included in a blue terminal group has no data to transmit, degrading the blue terminal to a transmission data non-existence layer; and (c) when any red terminal of a plurality of red terminals included in a red terminal group succeeds in intruding between the blue terminals and recognizes whether or not to transmit data without a collision, promoting the red terminal to the blue terminal group.

Abstract: A method of transmitting/receiving a frame between a portable terminal and a base station in a wireless broadband Internet network are provided. More particularly, a method of transmitting/receiving frames can include activating a session between the portable terminal and the base station, removing at least one header information field included in an Internet protocol (IP) datagram after activating the session, adding a network header which sets a predetermined transport connection identifier (TCID) to the IP datagram, generating the frame, and transmitting the generated frame via the activated session. Preferably, the frame is generated in any one of the portable terminal and the base station, and transmitted to the other one of the portable terminal and the base station.

Abstract: A method of providing a handover service to a mobile communication terminal supporting multi-modal communications, and a mobile communication terminal for performing the method are provided. More particularly, a method of eliminating an interruption of a data transmission service occurring during a handover between different communication networks, and a terminal for performing the method are provided. A method of providing a handover service of a mobile communication terminal supporting multi-modal communications can include: transmitting and receiving data to/from a corresponding node via a first access network and a second access network while simultaneously maintaining an association with the first access network and the second access network, determining a point in time of completing a handover registration, and releasing an association with the first access network after the point in time of completing the handover registration.

Abstract: A method of providing a handover service to a mobile communication terminal supporting multi-modal communications, and a mobile communication terminal for performing the method are provided. More particularly, a method of eliminating an interruption of a data transmission service occurring during a handover between different communication networks, and a terminal for performing the method are provided. A method of providing a handover service of a mobile communication terminal supporting multi-modal communications can include: transmitting and receiving data to/from a corresponding node via a first access network and a second access network while simultaneously maintaining an association with the first access network and the second access network, determining a point in time of completing a handover registration, and releasing an association with the first access network after the point in time of completing the handover registration.

Abstract: Provided is distributed medium access scheduling with implicit ordering (DSIO). The DISO includes the steps of: (a) when any terminal of a plurality of terminals included in a terminal group has data to transmit, promoting the terminal to a transmission data existence layer; (b) when any blue terminal of a plurality of blue terminals included in a blue terminal group has no data to transmit, degrading the blue terminal to a transmission data non-existence layer; and (c) when any red terminal of a plurality of red terminals included in a red terminal group succeeds in intruding between the blue terminals and recognizes whether or not to transmit data without a collision, promoting the red terminal to the blue terminal group.

Abstract: A method of providing a handover service to a mobile communication terminal supporting multi-modal communications, and a mobile communication terminal for performing the method are provided. More particularly, a method of eliminating an interruption of a data transmission service occurring during a handover between different communication networks, and a terminal for performing the method are provided. A method of providing a handover service of a mobile communication terminal supporting multi-modal communications can include: transmitting and receiving data to/from a corresponding node via a first access network and a second access network while simultaneously maintaining an association with the first access network and the second access network, determining a point in time of completing a handover registration, and releasing an association with the first access network after the point in time of completing the handover registration.

Abstract: A method of transmitting/receiving a frame between a portable terminal and a base station in a wireless broadband Internet network are provided. More particularly, a method of transmitting/receiving frames can include activating a session between the portable terminal and the base station, removing at least one header information field included in an Internet protocol (IP) datagram after activating the session, adding a network header which sets a predetermined transport connection identifier (TCID) to the IP datagram, generating the frame, and transmitting the generated frame via the activated session. Preferably, the frame is generated in any one of the portable terminal and the base station, and transmitted to the other one of the portable terminal and the base station.

Abstract: A method of providing a handover service to a mobile communication terminal supporting multi-modal communications, and a mobile communication terminal for performing the method are provided. More particularly, a method of eliminating an interruption of a data transmission service occurring during a handover between different communication networks, and a terminal for performing the method are provided. A method of providing a handover service of a mobile communication terminal supporting multi-modal communications can include: transmitting and receiving data to/from a corresponding node via a first access network and a second access network while simultaneously maintaining an association with the first access network and the second access network, determining a point in time of completing a handover registration, and releasing an association with the first access network after the point in time of completing the handover registration.