Mobile communication terminal having multicasting function and multicasting method using the same

• US 20070223488A1
• Filed: 03/22/2007
• Published: 09/27/2007
• Est. Priority Date: 03/23/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Baek Ju
• Granted Patent: US 8,160,050 B2
• Time in Patent Office: Days
• US Class Current: 370/395.200
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

A mobile communication terminal and multicasting method using the same are disclosed, by which an inter-multiuser multicasting function can be performed without using an access point. The present invention includes a user interface unit, a multicast group management module managing subscriber information based on information delivered via the interface unit, the multicast group management module playing a role in generating and transferring a multicast packet, an internet multicast protocol module delivering a message for joining or leaving a specific group according to a control signal provided by the multicast group management module, and a wireless LAN driving unit performing a multicast traffic action of transmitting the message provided by the internet multicast protocol module in a packet format to a joining group terminal by an ad-hoc system and delivering a packet received from a group terminal to the internet multicast protocol module.

Claims

1. A method for inter-multiuser using a terminal, comprising the step of performing inter-multiuser communications with a plurality of group members by an ad-hoc system using a mobile communication terminal having an internet group multicast protocol (IGMP) function.

2. A method for inter-multiuser using a terminal, comprising the steps of:

performing an ad-hoc join using a WLAN (wireless local area network);

performing a procedure for joining an arbitrary group by an internet group multicast protocol (IGMP) system;

performing a multicasting communication by the IGMP system;

performing a procedure for leaving the joined group; and

releasing the ad-hoc join.

3. A method for inter-multiuser using a terminal, comprising:

a multicasting join procedure (A) comprising;

a step (a-1) of transmitting an ad-hoc join packet to a terminal group having a same session ID;

a step (a-2) of receiving an ad-hoc response packet from the terminal group having the same session ID;

a step (a-3) of transmitting a multicast query packet including a group IP to join and a user name to the terminal group having the same session ID; and

a step (a-4) of receiving a group join success packet from the terminal group having the same session ID; and

a multicasting release procedure (B) comprising;

a step (b-1) of transmitting a user name and a multicast leave packet including a group IP joined by a mobile communication terminal attempting to leave a joined multicast group;

a step (b-2) of receiving a multicast leave success message (IGMP leave message);

a step (b-3) of transmitting an ad-hoc release request packet (ad-hoc leave packet) to the terminal group having the same session ID; and

a step (b-4) of receiving an ad-hoc leave complete message and displaying the received ad-hoc leave complete message to be recognized by a user.

4. A mobile communication terminal having a inter-multiuser multicasting function, comprising:

a user interface unit;

a multicast group management module managing subscriber information based on information delivered via the interface unit, the multicast group management module playing a role in generating and transferring a multicast packet;

an internet multicast protocol module delivering a message for joining or leaving a specific group according to a control signal provided by the multicast group management module; and

a wireless LAN driving unit performing a multicast traffic action of transmitting the message provided by the internet multicast protocol module in a packet format to a joining group terminal by an ad-hoc system and delivering a packet received from a group terminal to the internet multicast protocol module.