Abstract:
An apparatus and a method for linking in ZigBee networks are provided to provide linking protocols for data transmission between multiple ZigBee networks, thereby effectively transmitting data between multiple ZigBee networks. A method for linking in ZigBee networks comprises the following steps of: requesting linking to a first linking point by a first ZigBee coordinator in a first ZigBee network(S240); scanning multiple ZigBee networks by notifying the first linking point and the scanned result to the first ZigBee coordinator(S280); notifying the scanned result to the first linking point by selecting a second ZigBee network and a second linking point on the basis of the scanned result(S290); and requesting linking to the second linking point in the second ZigBee network by the first linking point.
Abstract:
PURPOSE: A semiconductor device and a method of operating the same are provided to control an upper wire and a lower wire independently by inserting a storage film pattern between word lines and an activity pillar. CONSTITUTION: Active pillars are arranged on a semiconductor substrate(10) in two-dimensionally. Upper impurity regions are used as a source or a drain electrode of memory cell transistors. An upper wiring(70) is arranged along one-way of the upper impurity regions. Upper wirings are connected to an upper wiring decoder through predetermined wiring structures. Upper wirings are connected to the upper impurity regions through a first plug(60). The word line(30) is arranged between active pillars while crossing the upper wirings. Word lines are connected to word line decoders through wiring structures. Lower wirings(40) are arranged under word lines. The storage film pattern(20) is arranged between the word lines and the active pillar.
Abstract:
A wireless channel coexisting system of a WLAN and a WPAN through wireless channel reservation and a method thereof are provided to remove collision caused by different communication methods, effectively improve data processing, and effectively reduce power consumption by reducing the number of times of re-transmission according to wireless channel reservation. A WLAN NIC(Network Interface Card)(340) transmits/receives data to/from the first terminal of a WLAN. An LR(Low Rate)-WPAN NIC(350) periodically transmits/receives data to/from the second terminal of a WPAN. A WLAN AP(Access Point) controller(320) controls the WLAN NIC(340), generates a message based on wireless channel reservation time information, and transfers the generated message to the WLAN NIC(340). An LR-WPAN coordinator(330) controls the LR-WPAN NIC(350) and sets a wireless channel reservation time and a data communication repetition period. An active channel reservation unit(310) controls the WLAN AP controller(320) based on the wireless channel reservation time and data communication repetition period received from the LR-WPAN NIC(350).
Abstract:
본 고안은 토론, 회의 및 발표에서와 같이 발언자의 발언 시간을 관리할 필요가 있을 때 한 두 개의 마스터(master) 스톱워치(stopwatch)만을 제어하면 무선 통신을 통해서 연결된 여러 개의 슬레이브(slave) 스톱워치들을 제어할 수 있으므로 직관적이고 인터페이스가 간단하며 확장성이 뛰어난 무선 스톱워치 시스템을 제공한다. 본 고안에 따른 무선 스톱워치 시스템은 적어도 하나의 마스터 스톱워치, 및 상기 마스터 스톱워치와 무선 통신하는 적어도 하나의 슬레이브 스톱워치를 포함하고, 상기 마스터 스톱워치는, 시작/일시 정지 토글 버튼, 상기 시작/일시 정지 토글 버튼을 누를 때마다 선택적으로 시간 계산 명령을 생성하고 상기 시간 계산 명령에 따라 경과 시간을 계산하는 마스터 제어부, 상기 마스터 제어부에서 계산된 경과 시간을 표시하는 마스터 시간 표시부, 및 상기 슬레이브 스톱워치로 상기 시간 계산 명령을 전송하는 마스터 통신부를 포함하고, 상기 슬레이브 스톱워치는, 상기 마스터 스톱워치로부터 상기 시간 계산 명령을 수신하는 슬레이브 통신부, 상기 수신된 시간 계산 명령에 따라 경과 시간을 계산하는 슬레이브 제어부, 및 상기 슬레이브 제어부에서 계산된 경과 시간을 표시하는 슬레이브 시간 표시부를 포함한다. 스톱워치, 무선 통신, 마스터, 슬레이브
Abstract:
A coexistence system for integrating heterogeneous wireless network devices, which use an identical frequency band, into a single board and an operation method thereof are provided to increase the throughput, reduce the frequency of retransmission, and minimize the power consumption by enabling an IEEE 802.11 WLAN and an IEEE 802.15.4 LR-WPAN to successfully execute their respective communication without any collision even though an identical frequency band is used. A coexistence system for integrating heterogeneous wireless network devices, which use an identical frequency band, into a single board comprises the first wireless network equipment(30), a synchronization unit(20), and the second wireless network equipment(10). The first wireless network equipment(30), or an IEEE 802.15.4 LR-WPAN, generates an interrupt to make a request for active channel reservation. The synchronization unit(20), such as ACROS(Active Channel Reservation for cOexiStence) software, forwards a channel reservation request interrupt in order to synchronize the time information between the first wireless network equipment(30) and the second wireless network equipment(10) which uses the same frequency band as the first wireless network equipment(30). The second wireless network equipment(10), or an IEEE 802.11 WLAN, reserves a radio channel through an RTS(Request To Send)/CTS(Clear To Send) switching scheme according to the channel reservation request interrupt. The second wireless network equipment(10), inactivated during the reservation period, helps the first wireless network equipment(30) to use the radio channel without interference.