Abstract: A channel selection method for reading tag information, a channel selection apparatus of an RFID reader applying the same, and an RFID reader. A channel selection apparatus of a radio frequency identification (RFID) reader equipped within a wireless communication portable terminal, includes a channel selection unit which selects a channel to read tag information stored in an RFID tag, and a channel determination unit which, when determining that the selected channel is not used by another RFID reader, determines the selected channel to be a channel to read the tag information. Accordingly, when a plurality of RFID readers reads out the tag information from the RFID tag almost at the same time, the interference among them can be avoided.

Abstract: Provided is a RFID tag with enhanced security. The tag includes a tag memory to store thereto pre-determined password information and tag data, an antenna to receive a tag data transmission request signal from an outer reader, and a tag controller to request the reader to transmit the password if the tag data transmission request signal is received, and then to transmit the tag data if the password received from the reader is identical with the pre-determined password. Accordingly, it can be prevented for a third-party, who does not know the password, to check the tag data.

Abstract: A wireless terminal and a radio frequency identification system for providing additional information and a method of providing additional information using the wireless terminal and the radio frequency identification system. The wireless terminal includes: a tag reader reading tag data from a radio frequency identification tag; a controller generating an additional information request signal with respect to the read tag data; and a communication network interface transmitting the additional information request signal through a communication network and receiving additional information with respect to the additional information request signal. Since the controller of the wireless terminal controls the radio frequency identification reader by optimally setting the information required for determining the time point for the radio frequency identification reader tag to respond, and utilizing the stored address of the additional information providing server, the additional information can be efficiently provided.

Abstract: A data routing method and system, the data routing method including: locating a destination node using a destination locating packet; establishing a preliminary route including anchor nodes based on a route where the destination locating packet is transmitted to the destination node; determining a link cost between neighbor nodes of each of the anchor nodes, and also between the anchor nodes and the neighbor nodes of each of the anchor nodes; generating minimum cost information with respect to a route consuming a minimum cost from the destination node to a source node using the link cost; and forming a data route from the destination node to the source node using the minimum cost information.

Abstract: When a reader of a Radio Frequency Identification (RF-ID) system sends out a command signal to the RF-ID tag and receives a response signal from the RF-ID tag, an End of Signal (EOS) of the received response signal is detected such that the next command signal can be transmitted within a time. Accordingly, response signal can be detected even under the environment of poor signal to noise ratio performance, and the EOS of the response signal from the RF-ID tag can be recognized with ease and speed.

Abstract: Provided is a RFID tag with enhanced security. The tag includes a tag memory to store thereto pre-determined password information and tag data, an antenna to receive a tag data transmission request signal from an outer reader, and a tag controller to request the reader to transmit the password if the tag data transmission request signal is received, and then to transmit the tag data if the password received from the reader is identical with the pre-determined password. Accordingly, it can be prevented for a third-party, who does not know the password, to check the tag data.

Abstract: A data routing method and system, the data routing method including: locating a destination node using a destination locating packet; establishing a preliminary route including anchor nodes based on a route where the destination locating packet is transmitted to the destination node; determining a link cost between neighbor nodes of each of the anchor nodes, and also between the anchor nodes and the neighbor nodes of each of the anchor nodes; generating minimum cost information with respect to a route consuming a minimum cost from the destination node to a source node using the link cost; and forming a data route from the destination node to the source node using the minimum cost information.

Abstract: A connection establishment apparatus and method between devices located on a WPAN are provided. The apparatus includes a control module that wakes up a ZigBee channel; a Zigbee module that scans at least one device located on the WPAN using the ZigBee channel and acquires Bluetooth connection information from the scanned device using the ZigBee channel; and a Bluetooth module that performs Bluetooth paging with the other devices by using the Bluetooth connection information, and establishes a Bluetooth piconet.

Abstract: A method of allocating an address to a mobile node constituting a wireless network in a tree structure. A mobile node receives a wireless network identification (ID) and sets an address of the mobile node, based on the wireless network ID. Accordingly, an address is set based on a PAN ID which is a randomly set variable According to the method, addresses of mobile nodes can avoid conflict in a comparatively simple manner.

Abstract: A local congestion-avoidance method in a wireless personal area network includes receiving data from a plurality of sensor nodes, generating a congestion-avoidance response signal with respect to the data first received, and broadcasting the congestion-avoidance response signal to the plurality of sensor nodes. The data may include, for example, a source address, a destination address, a sequence number, and a control frame. The control frame may include, for example, congestion-related information, a sequence number, a source address, and a destination address.

Abstract: When a reader of a Radio Frequency Identification (RF-ID) system sends out a command signal to the RF-ID tag and receives a response signal from the RF-ID tag, an End of Signal (EOS) of the received response signal is detected such that the next command signal can be transmitted within a time. Accordingly, response signal can be detected even under the environment of poor signal to noise ratio performance, and the EOS of the response signal from the RF-ID tag can be recognized with ease and speed.

Abstract: An address management method and a routing method for a wireless personal area network (WPAN) is provided. The address management method includes setting an update route flag relating to a portable node and a previous network address which is an address of the node before the movement, if a node moves around; and broadcasting a network command frame including the set update route flag and previous network address.

Abstract: An identification (ID) anti-collision method using a data structure to be applied to a radio frequency identification (RFID) system, includes transmitting an ID transmission request command from the reader to the tags using a predetermined request value; determining whether the IDs of the tags collide with one another, based on a bit pattern transmitted from the tags; if the IDs of the tags collide, computing a next request value to be used at a next request to transmit a request command, and if the IDs of the tags do not collide, computing and storing a future request value to be used; and if the IDs of the tags do not collide, transmitting and receiving data and a tag using an ID of the tag corresponding to the bit pattern and if the requested value is stored, transmitting a request command using the stored request value.

Abstract: A channel selection method for reading tag information, a channel selection apparatus of an RFID reader applying the same, and an RFID reader. A channel selection apparatus of a radio frequency identification (RFID) reader equipped within a wireless communication portable terminal, includes a channel selection unit which selects a channel to read tag information stored in an RFID tag, and a channel determination unit which, when determining that the selected channel is not used by another RFID reader, determines the selected channel to be a channel to read the tag information. Accordingly, when a plurality of RFID readers reads out the tag information from the RFID tag almost at the same time, the interference among them can be avoided.

Abstract: An anti-collision method is provided for a radio frequency identification (RFID) system including a reader, and two or more tags each having an ID. The anti-collision method includes transmitting an ID request value from the reader to the respective tags, the ID request value containing one or more of the codes forming the ID, receiving the ID from at least one of the tags which contain the ID request value, when a plurality of IDs collide, requesting the tags for a value representing a position of collision, and receiving the value representing the position of collision from the tags and identifying the IDs of the tags. Because collision pattern of the bits of respective IDs is recognized, and a plurality of IDs are recognized, the number of transmissions between the reader and the tags can be reduced.

Abstract: A Radio Frequency Identification (RFID) reader, an RFID tag, and a system and method for identifying a tag using a bit synchronizing signal are disclosed. The system for identifying a tag using a bit synchronizing signal includes: an RFID reader for transmitting a transmission request signal for tag data including a random number generation limit, the bit synchronizing signal, and the number of non-collision bits; and an RFID tag for generating a random bit and a random number within a random number generation limit and for counting the bit synchronizing signal to transmit a response signal through the random bit if the counted bit synchronizing signal coincides with the generated random number and transmitting the tag data to the RFID reader if the number of non-collision bits coincides with the random number. Thus, the identification time per tag can be provided uniformly regardless of the number of RFID tags.

Abstract: A mobile radio frequency identification (RFID) reader, a portable terminal having the same, and an RF transmission (Tx) power setting method thereof. The RF Tx power setting method includes selecting an RF Tx power of an RF Tx power which is used to read tag information from an RF identification (RFID) tag; and setting the selected RF Tx power to a Tx power of the RF Tx signal. Accordingly, since it is possible to variably set the Tx power of the RF Tx signal used to read out the tag information from the RFID tag, the power consumption can be reduced at the RFID reader or the portable terminal equipped with the RFID reader.

Abstract: A method for generating and registering an identification in a wireless sensor network. The method includes generating an identification of a first layer node; transmitting the identification of the first layer node to a second layer node; detecting whether the identification of the first layer node is duplicated, using the second layer node; if the identification of the first layer node is not duplicated, transmitting a determination message from the second layer node to the first layer node; and determining the identification of the first layer node as a determined identification. The method further includes: if the second layer node does not have a determined identification, re-transmitting the identification of the first layer node after a predetermined period of time has lapsed. Therefore, an automatically identification allocating method using a hierarchical structure can be adopted to enable a distributed management.

Abstract: A wireless terminal and a radio frequency identification system for providing additional information and a method of providing additional information using the wireless terminal and the radio frequency identification system. The wireless terminal includes: a tag reader reading tag data from a radio frequency identification tag; a controller generating an additional information request signal with respect to the read tag data; and a communication network interface transmitting the additional information request signal through a communication network and receiving additional information with respect to the additional information request signal. Since the controller of the wireless terminal controls the radio frequency identification reader by optimally setting the information required for determining the time point for the radio frequency identification reader tag to respond, and utilizing the stored address of the additional information providing server, the additional information can be efficiently provided.

Abstract: A method and system for enhancing a voice channel in voice over Internet protocol includes an integrated access device (IAD) that receives voice data from user devices, removes RTP/UDP header and IP header information, and generates an AAL2 CPS cell. A Registration, Administration and Status (RAS) server receives the AAL2 CPS cell, removes the AAL2 information and adds an RTP/UDP header and IP header, such that an IP packet is output for Internet transport. The RAS server can also receive an IP packet and convert the IP packet to an AAL2 CPS cell, to be transported to the IAD. The RAS performs the conversion in accordance with header data received from the IAD that is stored in, and removed from, a lookup table in response to command signals sent by the IAD. Thus, the asymmetric digital subscriber line (ADSL) handles an increased number of calls, and at an increased efficiency.