Abstract:
Disclosed are a method and an apparatus for the discovery of a sector in a wireless LAN system. A method for the discovery of a sector by an access point (AP) in a wireless LAN system comprises: a step of setting sector beacon intervals in which the AP of the wireless local area network system transmits a sector beacon to any one sector from among a plurality of spatially divided sectors, and an omni beacon interval in which the AP transmits an omnidirectional beacon to the one sector; a step of transmitting a sector beacon to any one current sector from among the plurality of sectors; a step of transmitting, to the current sector, a transmission frame indicating a sector transmission or a transmission frame indicating an omnidirectional transmission in the sector interval between the sector beacon intervals; and a step of receiving, from the terminal located in the current sector, a response frame indicating that the transmission frame indicating the sector transmission is received and an association is made.
Abstract:
A channel access method and apparatus are disclosed. The channel access method by an access point (AP) having a sector antenna in a wireless local access network (WLAN), may include transmitting a sector beacon with respect to any one sector among a plurality of sectors, transmitting and receiving data with at least one station in any one sector during a pre-scheduled sector interval, sequentially performing transmission of the sector beacon and transmission and reception of the data with respect to remaining sectors of the plurality of sectors excluding the any one sector, transmitting an omni beacon with respect to all of the plurality of sectors, and transmitting and receiving data with respect to at least one station of the plurality of sectors during a pre-scheduled Basic Service Set (BSS) interval.
Abstract:
PURPOSE: A role based access control system and a method thereof are provided to automatically change a role by applying a knowledge based rule to a cloud computing environment, thereby obtaining stability and reliability of data. CONSTITUTION: A role database(230) stores a role allocated to a user. A rule database(240) stores a rule for changing and withdrawing the role allocated to the user. A role manager(210) allocates the role to the user and assigns a right to the user by referring to the role database. The role manager changes and withdraws the role by referring the rule database. A task manager(220) assigns a task right to the user.
Abstract:
PURPOSE: A packet processing method which improves Ethernet switch performance is provided to reduce the number of times a memory is accessed. CONSTITUTION: If an Ethernet packet does not include a tag or if a tag is not a VLAN(Virtual LAN) tag, information including default VLAN number is read from an L2 port table corresponding to the input port of the packet. Information required for a VLAN mapping function is read from a VLAN table(625). Port state information is read from the VLAN table with reference to a VLAN port table(630). The port state information is included when setting meta data according to the type of packet.