Abstract:
본 발명은 단일 무선 인터페이스를 갖는 무선 로컬 영역 네트워크(WLAN: Loacoal Area Network)를 위한 다중채널 매체접속제어(MAC: multi-channel media access control) 방법에 있어서, 윈도우 P를 주기로 반복되는 윈도우 및 상기 윈도우 P의 시작 시점부터 일정 시간 지속되는 채널 정합 윈도우(Channel Coordination Window)를 시작하는 단계; 상기 채널 정합 윈도우 동안에 N개의 채널 각각의 사용 여부를 지시하는 채널 사용 벡터를 사용하여 공통채널을 할당받고 있는 WLAN 장치 쌍을 목적채널에 할당하는 단계; 및 상기 WLAN 장치 쌍을 상기 목적채널로 스위칭하는 단계를 포함한다. 메시, 무선랜, 공통채널, 매체접속제어
Abstract:
본 발명은 회선 교환 무선망에서 멀티미디어 톤/안내방송을 제공하는 시스템 및 그 방법에 관한 것으로서, 본 발명은 회선 교환 무선망(circuit switched wireless networks)에서 H.324M 종단간 H.324M 초기화(initialization)를 중계함으로써 회선 교환 무선망(circuit switched wireless networks)에서 H.324M을 기반으로 한 다중 콜 연결(multi call leg) 기능을 처리할 수 있는 효과가 있다. 이로 인해 본 발명은 회선 교환 무선망(circuit switched wireless networks)에서 H.324M을 기반으로 한 영상전화 서비스 시 다양한 멀티미디어 서비스(예컨대, 멀티미디어 RBT/안내방송 서비스, 영상회의 등)를 제공할 수 있는 장점이 있다. 또한 이를 통해 영상전화의 활성화를 꾀할 수 있으며 다양한 멀티미디어 서비스 제공에 따른 새로운 수익 창출이 가능한 장점이 있다.
Abstract:
무선 근거리 네트워크의 비콘 병합 장치 및 그 방법이 개시된다. 본 발명의 무선 근거리 네트워크의 비콘 병합 방법은 수신된 에일리언(alien) BP(Beacon Period)의 연속적인 출현 빈도를 계산하는 단계, 상기 계산된 출현 빈도와 기 결정된 기준 출현 빈도를 비교하는 단계 및 상기 계산된 출현 빈도가 상기 기준 출현 빈도 이상인 경우 자신의 비콘 그룹과 에일리언 비콘 그룹을 병합하는 단계를 포함하는 것을 특징으로 한다. 비콘, 병합, BP, 출현 빈도
Abstract:
An apparatus and a method for beacon merging in a wireless LAN are provided to minimize a waste of resources and the power consumption by preventing a beacon merging process which can be generated by a transiently received alien beacon. An apparatus for beacon merging in a wireless LAN comprises an appearance frequency calculation part(140), an appearance frequency comparison part(150), and a beacon merging management part(160). The appearance frequency calculation part calculates the consecutive appearance frequency of a received alien BP(Beacon Period). The appearance frequency comparison part compares the calculated appearance frequency with a predetermined reference appearance frequency. The beacon merging management part, in case the calculated appearance frequency is higher than the predetermined reference appearance frequency, merges its own beacon group with an alien beacon group.
Abstract:
A multi-channel MAC(Medium Access Control) method for a single wireless interface WLAN(Wireless Local Area Network) device is provided to remove a need to equip a device having a multi-wireless interface, while simple and extended frameworks are supported in different traffic scenarios. A window repeated at a cycle P and a channel coordination window continued for a certain time from a starting point of the window P are initiated. Random device pairs on a common channel are assigned to a destination channel by using a channel usage vector indicating whether to use each of N channels during the channel coordination window. The random device pairs are switched to the destination channel.
Abstract:
A method for supporting a multi-channel in a wireless mesh network is provided to enhance channel efficiency by equally distributing the amount of data transmitted in each data channel every period. A method for supporting a multi-channel in a wireless mesh network includes the steps of: sharing traffic information of all nodes by transmitting and receiving an ATIM(Ad hoc Traffic Indication Messages)(200), defined as a phase 1(130); deciding own channel by transmitting and receiving a CHS(CHannel Selection) message, defined as a phase 2(140); transmitting and receiving a re-transmission message in a case of the CHS message not received, corresponding to the ATIM, defined as a phase 3(150); and moving to the decided channel and transmitting data.
Abstract translation:提供一种用于在无线网状网络中支持多信道的方法,以通过在每个周期均等地分配在每个数据信道中发送的数据量来增强信道效率。 一种用于在无线网状网络中支持多信道的方法包括以下步骤:通过发送和接收被定义为阶段1(130)的ATIM(Ad hoc Traffic Indication Messages)(200)来共享所有节点的业务信息; 通过发送和接收定义为阶段2(140)的CHS(信道选择)消息来决定自己的信道; 在没有接收到对应于定义为阶段3(150)的ATIM的CHS消息的情况下发送和接收重发消息; 并移动到决定的频道并发送数据。
Abstract:
An apparatus and a method for transmitting/receiving data in a WLAN(Wireless Local Area Network) mesh communication system are provided to reduce the quantity of control signals transceived to a control channel, thereby improving the performance of a WLAN mesh communication network by giving reliability to the data transmission of multicast and broadcast type. A data reception method comprises the following steps of: receiving a first control signal to determine whether it is possible to receive data; and waiting for data when it is possible to receive the data and transmitting a second control signal notifying that data reception is not possible when it is not possible to receive the data. The above second control signal is information that enables data transmission if the second control signal is not received during a predetermined time interval(313).
Abstract:
An apparatus and a method for assigning channels in a WLAN(Wireless Local Area Network) mesh communication system are provided to obtain channel assignment information to be used in multi-channel establishment by receiving the control signal of common channels while transmitting a data frame, thereby increasing capacity of the total WLAN mesh communication system by more efficiently using a disabled channel. A method for assigning channels in a WLAN mesh communication system comprises the following steps of: assigning the first channel to dedicated channels(N1(211), N2(213)) transmitting data frame; and assigning the second channel, common channels(N3(215),N4(217),N5(219)) which receives a control frame while transmitting the data frame through the first channel. The frequency of the first channel is different from that of the second channel.
Abstract:
PURPOSE: A DTMF(Dual Tone Multi-Frequency) processing method and apparatus for utilizing a tandem function of a VoIP(Voice Internet Protocol) gateway system are provided to accurately transmit a DTMF signal, reduce a DTMF error recognition rate, and provide a service without restriction to the number of lines. CONSTITUTION: A caller depresses an office line front cord through a first exchange(10) and a VoIP network(20). At this time, if a destination trunk network(40) is in a call available state, the subscriber listens to a dial tone outputted from a tandem trunk. Then, when the first exchange and a second exchange(30) are connected, a main processor(31) judges that a call setup has been completed, and releases occupancy of a DTMF receiver. When the caller depresses a phone number to a destination, a channel is connected, a DTMF tone signal is generated from the caller's phone. A VoIP module(25) receives the information, makes a corresponding data, and transmits it to the main processor(31) When the second exchange(30) receives the DTMF signal, it instantly analyzes characteristics of the tandem trunk. If the tandem trunk is connected to a general PSTN, the second exchange(30) allocates a DTMF transmitter and generates a tone only when it receives a DTMF message.