摘要:
A method and system for transmitting data from a base station to a mobile station in a wireless communication system using a multiple hop relay scheme is In a multi-hop system having a plurality of nodes, performing bidirectional data transmission between the nodes comprises: grouping the plurality of nodes into a first node group to a fourth node group, and assigning data transmission intervals to the grouped node groups at each frame, the data transmission intervals dividing each frame in time; receiving, by a second group node, data from an upper group node at a first frame and, at the same time, receiving, by a third group node, data from a lower group node; and transmitting by the second group node data to the upper group node at a second frame and, at the same time, transmitting by the third group node data to the lower group node.
摘要:
A routing method and system for a mobile ad-hoc network is provided for efficiently routing a packet by quickly updating topology information shared by nodes adaptively to variation of the network topology while minimizing generation of redundant traffic. The routing method includes setting, at each current node, a self-potential value to a destination node upon receiving a route recovery request; and transmitting, when a transmission packet is destined to the destination node, the packet through a route established with at least one node in a descending order of potential value. The present invention reduces the redundant traffic dramatically, thereby improving the entire network throughput.
摘要:
An input unit having a keyboard arrangement allowing efficient input of English words, a mobile terminal having the input unit, and a method for inputting a message using the input unit are provided. The input unit includes a plurality of symbol keys to which a plurality of symbols are sequentially allocated; and at least one selection key for selecting symbols allocated to at least second positions in the symbol keys. The input unit includes the selection key, to reduce the number of selections of keys when alphabet letters are input, thereby reducing the message input time and solving the inconvenience associated with inputting letters of the alphabet via the input unit.