摘要:
In a mobile wireless network system including a plurality of nodes communicating with each other, a node attempting to transmit data finds useable resources through performing carrier sensing on packet data unit (PDU) slots and transmits data through the found resources. A node attempting to receive data finds useable resource through performing carrier sensing on acknowledge (ACK) slots and receives data through the found resources.
摘要:
In a mobile wireless network system including a plurality of nodes, available resources of a transmitting node and available resources of a receiving node are searched for. Commonly overlapped allocatable resources among available resources of a transmitting node and available resources of a receiving node are searched for, areas corresponding to the calculated allocation resource number according to an allocation condition that is set in the allocatable resource area are selected, and the areas are allocated to the transmitting node or the receiving node.
摘要:
Provided is a frame structure designed for distributed access control and OFDMA transmission in a wireless mesh network. Also, a communication method and a network node based on the frame structure are provided. Mesh nodes included in the wireless mesh network may use the frame structure and thus, may have a high prospect of transmitting a network configuration information message and scheduling information for obtaining a resource. Also, a scheduling process of the mesh nodes may be completed within a short period based on the frame structure.
摘要:
In an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network, a communication node receives information regarding a next transmission time of a 1-hop node and a 2-hop node through the 1-hop node, calculates next transmission intervals of the 1-hop node and the 2-hop node, determines a next transmission time of the communication node by using the next transmission intervals of the 1-hop node and the 2-hop node, and then transmits, to an 1-hop node of the communication node, the information of the next transmission time together with the information of the transmission time of the 1-hop node, received from the 1-hop node.
摘要:
In an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network, a communication node receives information regarding a next transmission time of a 1-hop node and a 2-top node through the 1-hop node, calculates next transmission intervals of the 1-hop node and the 2-hop node, determines a next transmission time of the communication node by using the next transmission intervals of the 1-hop node and the 2-hop node, and then transmits, to an 1-hop node of the communication node, the information of the next transmission time together with the information of the transmission time of the 1-hop node, received from the 1-hop node.
摘要:
A method and apparatus for distributed scheduling within an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network may be provided. A requester and a granter in the wireless mesh network may perform three way-handshaking using distributed scheduling messages. A plurality of distributed scheduling messages may use different sub-channels. The request may reserve sub-channels to be used by respective scheduling messages.
摘要:
Disclosed is a symbol synchronization obtaining apparatus robust to a frequency offset in a cell search of a wireless communication system. The symbol synchronization obtaining apparatus robust to a frequency offset in a cell search of a wireless communication system may include a sequence generator to generate a base sequence for obtaining the symbol synchronization, a synchronization pattern generator to generate a modified sequence based on the base sequence, and to generate a synchronization pattern by combining the modified sequence and the base sequence, a frequency mapping unit to perform mapping of transmission information to a time area and a frequency area, based on the synchronization pattern, for generating a transmission frame, and a transmitting unit to transmit the transmission frame.
摘要:
A mobile communication terminal for displaying supplementary information on a background screen includes a communication unit, a storage unit for storing cumulative transmissions and receptions of calls and messages corresponding to supplementary information, a cumulative number rank determiner for comparing the cumulative transmissions and receptions of calls and messages and determining a cumulative number rank for the phone number, a controller for creating a map consisting of the supplementary information arranged from the highest to the lowest cumulative number rank of the phone number, and a display unit for displaying the supplementary information together with the cumulative number rank. The terminal allows a user to easily visualize supplementary information corresponding to a phone number by display on the background screen.
摘要:
This invention relates to novel partially dehydrated amorphous calcium sodium pyrophosphate and to the production of such compounds. Also this invention relates to the process for the use of these compounds to gel aqueous solutions of some polyols and to the gels obtained therefrom.
摘要:
A mobile terminal and a method of displaying a menu thereof are provided. The method includes displaying a list of upper-level menus in an order on a display screen, displaying a first upper-level menu at an upper end of the display panel, a second upper-level menu that is next to the first upper-level menu in the order at a lower end of the display screen, and lower-level menus of the first upper-level menu in a list between the first upper-level menu and the second upper-level menu in response to selection of the first upper-level menu from the list of upper-level menus, and executing a selected lower-level menu in response to selection of one of the lower-level menus.