Abstract:
A wireless communication method using a control channel between wireless communication devices including: exchanging profile information between a node and intermediate relay nodes therearound so as to allow the node to transmit/receive data to/from a destination node; determining, by the node, a first intermediate relay node using the profile information and determining a wireless communication mode with the first intermediate relay node; and transmitting/receiving data between the node and the first intermediate relay node by the determined wireless communication mode is provided.
Abstract:
A method of configuring a multi-superframe is provided. The method includes setting at least one parameter for configuring the multi-superframe, and configuring the multi-superframe corresponding to the at least one parameter, wherein the at least one parameter includes a superframe order (SO), a beacon order (BO), and a multi-superframe order (MO), in a form of positive integers, and the setting includes setting the MO to have a value higher than the BO.
Abstract:
An apparatus for managing a channel resource by a node sets a channel hopping sequence and a channel hopping offset value which are to be used, divides an assigned time slot into a plurality of subslots, divides a data frame for transmission into a plurality of subframes, and selects a channel for transmitting the plurality of subframes in the plurality of subslots, respectively, by channel hopping based on the channel hopping sequence, the channel hopping offset value, the index of the time slot, and the index of a subslot for transmitting a subframe.
Abstract:
An end device transmits a request command for requesting a slot management to a coordinator, and receives a reply command including a result of the slot management request from the coordinator. Each of the request command and the reply command includes an allocation order for indicating a slot allocation interval request.
Abstract:
A multi-channel wireless network acquires reference time information that is commonly applied to all multi-channels and acquires packet receiving time information of a received packet on each channel basis based on the reference time information by spreading and applying the reference time information to each channel.
Abstract:
In a wireless sensor network, it is determined whether to multiplex a packet that is generated in a random node. When a packet is to be multiplexed, by multiplexing at least one packet, a frame of a first length is generated and transmitted. The frame of the first length includes a payload in which at least one of data portions including a header unit and a data unit having a second length smaller than the first length is multiplexed.
Abstract:
A received signal strength indicator is provided. The received signal strength indicator includes a plurality of differential amplifiers forming an amplifier chain for amplifying differential signals and a plurality of rectifiers for rectifying signals output from the plurality of differential amplifiers and the differential signals, and a low pass filter for combining the signals rectified by the plurality of rectifiers to output received signal strength. Each rectifier includes a class AB voltage-current converter for converting a differential voltage into a current, and two triode transistors.
Abstract:
A method and apparatus for encoding a constant amplitude that is applied to a code division multiplexing communication system are provided. By dividing a data bit into a block unit, the receiving side can easily determine an error, and by reducing power consumption in outdoor wide area communication using a bit string of a small length in a basic unit of an input frame, efficiency can be improved, and thus a physical layer of a ubiquitous sensor network can be optimized.
Abstract:
Provided are a method of allocating resources in a wireless local area network (WLAN) system and the WLAN system including an access point (AP) to allocate a resource for communication between a relay and a station associated with the relay, the relay to allocate a restricted access window (RAW) or a slot for communication with a station based on the allocated resource, and the station to communicate with the relay based on the allocated RAW or the allocated slot.
Abstract:
Provided are a method of allocating resources in a wireless local area network (WLAN) system and the WLAN system including an access point (AP) to allocate a resource for communication between a relay and a station associated with the relay, the relay to allocate a restricted access window (RAW) or a slot for communication with a station based on the allocated resource, and the station to communicate with the relay based on the allocated RAW or the allocated slot.