Abstract:
A method and system for MU-MIMO transmission in a wireless local area network are disclosed. A method for transmitting data in the wireless local area network, which supports the MU-MIMO, comprises the steps of determining types of a first frame to transmit data to at least one reception terminal; setting user identification information, which indicates the order of at least one reception terminal, based on the determination result; transmitting the first frame to at least one reception terminal corresponding to the user identification information; receiving a second frame corresponding to the first frame from the at least one reception terminal; extracting a beam-forming parameter for the at least one reception terminal based on the received second frame; and transmitting the user identification information corresponding to the at least one reception terminal and the beam-forming parameter to a physical layer.
Abstract:
본 발명은, 무선 랜(WLAN: Wireless Local Area Network) 통신 시스템에서 다수의 채널을 이용하여 데이터의 전송 효율을 향상시키기 위한 자원 할당 장치 및 방법에 관한 것으로, 다수의 가용 채널들 중에서, 연속적(contiguous) 또는 비연속적인(non-contiguous) 복수의 채널을 하나의 서브채널 그룹(sub-channel group)으로 미리 설정하거나, 특정 패턴이나 또는 임의적으로 복수의 채널을 하나의 서브채널 그룹으로 미리 설정하거나, 쌍(pair)으로 또는 소정 개수로 그룹핑한 후 특정 패턴이나 또는 임의적으로 복수의 채널을 하나의 서브채널 그룹으로 미리 설정하는 설정부; 및 단말로부터의 채널 할당 요청에 따라 해당하는 상기 단말에 상기 미리 설정된 서브채널 그룹을 할당하는 할당부를 포함한다. 무선 랜, Wireless LAN, 자원할당
Abstract:
PURPOSE: A data transmitting/receiving method and apparatus thereof in a MU-MIMO(Multi User-Multi Input Multi Output) system are provided to set up a sequence of a receiving confirmation signal and to prevent the collision of data from a MU-MIMO system. CONSTITUTION: A plurality of data frames including data and receipt notification order information is generated(S802). A plurality of data frames is transmitted to a plurality of reception terminals(S804). A receiving confirmation signal is received from a plurality of receiving terminals according to the receiving confirmation sequence information(S806).
Abstract:
PURPOSE: A method for allocating a group address in a WLAN(Wireless Local Area Network), a method for transferring a response request and a response frame to plural terminal in the WLAN, and a method for transferring data using the group address are provided to transfer a response frame without collision between wireless terminals. CONSTITUTION: A group agreement request frame is transferred to grouping-target object terminals, and includes a group address. A response frame for the group agreement request frame is received. The response frame is the group agreement response frame or an Ack frame for the group agreement response frame.
Abstract:
PURPOSE: A connecting method of a wireless LAN system using multi channels is provided to enable an access point to access a plurality of wireless terminals through multi channels. CONSTITUTION: A beacon frame including the first channel information which is information about the first available frequency channel of an access point is broadcast(S401). A connection request frame including the second channel information which is information about the second available frequency channel of the wireless terminal is received(S403). A connection response frame including the third channel information which is information about a frequency channel assigned to the wireless terminal is transmitted to the wireless terminal(S405).
Abstract:
PURPOSE: A hand-off device of different systems and a method thereof are provided to reflect the property of the different systems, and to reduce the delay time of the system due to a hand-off process. CONSTITUTION: A module B(230) measures a channel state at a time sharing base cell. An interface(220) stores information of candidate set cells which has the same mode with a frequency division cell. The interface transfers the stored information to a module A(210). A hand-off determining unit compares the channel state information of a module A and the channel state information of the module B. The hand-off determination unit determines the hand-off with the cell having good channel environment.