# US 2013/0159458 A1 · Apparatus and method for transmitting/receiving data in communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0159458 A1 - Document ID: US20130159458A1 - Status: Published application - Kind: A1 - Application number: 13/654,362 - Filed: 2012-10-17 - Published: 2013-06-20 - Earliest claimed: 2011-10-17 - Assignees: Electronics and Telecommunications Research Institute - Inventors: Hee-Jung YU; Min-Ho CHEONG; Sok-Kyu LEE - Web page: https://patentgrep.com/patent/US20130159458A1 ## CPC - H04L 67/10: in which an application is distributed across nodes in the network (software deployment G06F8/60; multiprogramming arrangements G06F9/46) - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - H04W 48/10: using broadcasted information - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A data transmission apparatus in a communication system includes a reception unit configured to receive terminal information from a plurality of terminals through a new frequency band for transmitting and receiving data between the plurality of terminals and one AP (access point); a verification unit configured to verify the terminal information, group the terminals into terminal groups by using the terminal information, and verify virtual APs which respectively correspond to the terminal groups, in the AP; and a transmission unit configured to transmit beacon frames in the virtual APs, to the terminals included in the terminal groups, wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information. ## Claims ### Claim 1 A data transmission apparatus in a communication system, comprising: a reception unit configured to receive terminal information from a plurality of terminals through a new frequency band for transmitting and receiving data between the plurality of terminals and one AP (access point); a verification unit configured to verify the terminal information, group the terminals into terminal groups by using the terminal information, and verify virtual APs which respectively correspond to the terminal groups, in the AP; and a transmission unit configured to transmit beacon frames in the virtual APs, to the terminals included in the terminal groups, wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information. ### Claim 2 (depends on 1) The data transmission apparatus of claim 1, wherein the beacon interval information includes a beacon interval which indicates a time interval between beacon frames corresponding to the same virtual AP, in the virtual APs. ### Claim 3 (depends on 1) The data transmission apparatus of claim 1, wherein the beacon duration information includes a beacon duration which indicates a time interval between a beacon frame in a first virtual AP and a beacon frame in a second virtual AP next to the first virtual AP, among the virtual APs. ### Claim 4 (depends on 1) The data transmission apparatus of claim 1, wherein the beacon offset information includes a beacon offset which indicates a time difference between a reference beacon frame in the AP and a beacon frame in a first virtual AP among the virtual APs. ### Claim 5 (depends on 1) The data transmission apparatus of claim 1, wherein the terminal group information includes information which indicates a network situation in the virtual APs and information for the numbers of terminals included in the terminal groups corresponding to the virtual APs and the numbers of terminals capable of being additionally connected. ### Claim 6 (depends on 1) The data transmission apparatus of claim 1, wherein the transmission unit transmits respective beacon frames in the virtual APs during the beacon interval of reference beacon frames in the AP. ### Claim 7 (depends on 1) The data transmission apparatus of claim 1, wherein the transmission unit transmits respective beacon frames in the virtual APs, by extending the beacon interval of reference beacon frames in the AP and setting the beacon interval of the reference beacon frames as the beacon duration. ### Claim 8 (depends on 1) The data transmission apparatus of claim 1, wherein the terminal information includes subscription information of the terminals and service quality information which indicates data transmission periods, transmission delays and data priorities. ### Claim 9 (depends on 1) The data transmission apparatus of claim 1, wherein the transmission unit transmits beacon frames in the AP, to terminals included in a terminal group with a highest connection priority among the terminal groups. ### Claim 10 A data transmitting method in a communication system, comprising: receiving terminal information from a plurality of terminals through a new frequency band for transmitting and receiving data between the plurality of terminals and one AP (access point); verifying the terminal information, grouping the terminals into terminal groups by using the terminal information, and verifying virtual APs which respectively correspond to the terminal groups, in the AP; and transmitting beacon frames in the virtual APs, to the terminals included in the terminal groups, wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information. ### Claim 11 (depends on 10) The method of claim 10, wherein the beacon interval information includes a beacon interval which indicates a time interval between beacon frames corresponding to the same virtual AP, in the virtual APs. ### Claim 12 (depends on 10) The method of claim 10, wherein the beacon duration information includes a beacon duration which indicates a time interval between a beacon frame in a first virtual AP and a beacon frame in a second virtual AP next to the first virtual AP, among the virtual APs. ### Claim 13 (depends on 10) The method of claim 10, wherein the beacon offset information includes a beacon offset which indicates a time difference between a reference beacon frame in the AP and a beacon frame in a first virtual AP among the virtual APs. ### Claim 14 (depends on 10) The method of claim 10, wherein the terminal group information includes information which indicates a network situation in the virtual APs and information for the numbers of terminals included in the terminal groups corresponding to the virtual APs and the numbers of terminals capable of being additionally connected. ### Claim 15 (depends on 10) The method of claim 10, wherein said transmitting transmits respective beacon frames in the virtual APs during the beacon interval of reference beacon frames in the AP. ### Claim 16 (depends on 10) The method of claim 10, wherein said transmitting transmits respective beacon frames in the virtual APs, by extending the beacon interval of reference beacon frames in the AP and setting the beacon interval of the reference beacon frames as the beacon duration. ### Claim 17 (depends on 10) The method of claim 10, wherein the terminal information includes subscription information of the terminals and service quality information which indicates data transmission periods, transmission delays and data priorities. ### Claim 18 (depends on 10) The method of claim 10, wherein said transmitting transmits beacon frames in the AP, to terminals included in a terminal group with a highest connection priority among the terminal groups. ### Claim 19 A data reception apparatus in a communication system, comprising: a generation unit configured to generate terminal information in a new frequency band for transmitting and receiving data between a plurality of terminals and one AP (access point); a transmission unit configured to transmit the terminal information to the AP; and a reception unit configured to receive beacon frames from a virtual AP of a terminal group corresponding to the terminal information in the AP, wherein respective virtual APs corresponding to terminal groups to which the terminals are grouped are included in the AP, wherein the terminals included in the terminal groups are connected by respectively receiving beacon frames from virtual APs corresponding to their terminal groups among the virtual APs, and wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information. ### Claim 20 A data receiving method in a communication system, comprising: generating terminal information in a new frequency band for transmitting and receiving data between a plurality of terminals and one AP (access point); transmitting the terminal information to the AP; and receiving beacon frames from a virtual AP of a terminal group corresponding to the terminal information in the AP, wherein respective virtual APs corresponding to terminal groups to which the terminals are grouped are included in the AP, wherein the terminals included in the terminal groups are connected by respectively receiving beacon frames from virtual APs corresponding to their terminal groups among the virtual APs, and wherein the beacon frames include beacon interval information, beacon duration information, beacon offset information, and terminal group information.