Abstract: A synchronization apparatus in a control base station is disclosed. A GNSS synchronization unit receives a GNSS signal through a GNSS antenna to obtain time information. A clock generation unit adjusts a clock of the control base station based on the time information provided by the GNSS synchronization unit. A traffic base station synchronization unit transmits and receives information with a traffic base station through a wired connection. A user data sample generation unit generates data required by a mobile user including network time information, and transmits the data to the mobile user equipment through a control base station antenna.

Abstract: It is provided a dynamic association control apparatus comprising: an information acquisition part configured to acquire information related to an object relay node and to candidate base stations to be associated; a blocking probability calculation part configured to calculate respectively a candidate blocking probability in a case where the object relay node performs association with each of the candidate base stations to be associated according to the acquired information; and an association control part configured to select an object blocking probability from the calculated candidate blocking probabilities, and use a base station corresponding to the selected object blocking probability as an object base station to which the association is transferred, so that the object relay node changes to be associated with the object base station to which the association is transferred.

Abstract: It is provided are a server including: a storage module for storing original files and characteristics of the original files; an encoding module for encoding the original files stored in the storage module to generate encoded symbols; an information acquisition module for communicating with at least one transmission node and acquiring state information from the at least one transmission node; a control module for calculating a number of the encoded symbols to be sent to the at least one transmission node for caching based on the characteristics of the original files stored in the storage module and the state information of the at least one transmission node acquired by the information acquisition module; and a communication module for sending the encoded symbols to the at least one transmission node based on the number of the encoded symbols calculated by the control module.

Abstract: A synchronization apparatus in a control base station is disclosed. A GNSS synchronization unit receives a GNSS signal through a GNSS antenna to obtain time information. A clock generation unit adjusts a clock of the control base station based on the time information provided by the GNSS synchronization unit. A traffic base station synchronization unit transmits and receives information with a traffic base station through a wired connection. A user data sample generation unit generates data required by a mobile user including network time information, and transmits the data to the mobile user equipment through a control base station antenna.

Abstract: The base station includes: a determination unit for comparing states of traffic currently provided by the base station and other neighboring base stations and determining whether the base station has the lowest traffic; an information transmission unit for sending a sleep request and a handover request for handing over the user terminal associated with the base station to one of the neighboring base stations in case where the determination unit determines that the traffic currently provided by the base station is lowest; a receiving unit for receiving feedback information sent from the one of the neighboring base stations after admission control; and an executing unit for executing sleep decision after receiving handover request permitting information from the neighboring base station.

Abstract: It is provided a renewable energy base station, which is used in a wireless cellular system, including: an adjustment request determining part for determining whether an adjustment to a coverage area is required; an adjustment request transceiver in case where it is determined that the adjustment to the coverage area is required, sending a coverage area adjustment request to neighboring base stations in the wireless cellular system, and receiving an adjustment request response from the neighboring base stations; an adjustment request responding part for determining whether the coverage area adjustment request from the one of the neighboring base stations is allowed in case where receiving the coverage area adjustment request from one of the neighboring base stations; and a response transmitter for sending the adjustment request response to the neighboring base stations based on a result of the determination made by the adjustment request responding part.

Abstract: Provided is a micro base station to be used in a heterogeneous cellular network. The micro base station has resources including frequency bands and time slots and being available for a user to use. The heterogeneous cellular network includes a plurality of base stations including a macro base station and the micro base station. The micro base station includes: an information acquiring part configured to acquire configuration information and load information of the micro base station, and to acquire configuration information and load information of a neighboring base station adjacent to the micro base station from the neighboring base station; and a resource selection part configured to select a part of the resources from the resources to provide the selected part of the resources to the user based on the configuration information and the load information of the micro base station and the neighboring base station.

Abstract: A method of sending data from a source node in a wireless communications network is provided. In an example, the method includes selecting one of a plurality of available routing paths, from the source node to a destination node, on which to send data based on routing criteria specified by the source node.

Abstract: It is provided a dynamic association control apparatus comprising: an information acquisition part configured to acquire information related to an object relay node and to candidate base stations to be associated; a blocking probability calculation part configured to calculate respectively a candidate blocking probability in a case where the object relay node performs association with each of the candidate base stations to be associated according to the acquired information; and an association control part configured to select an object blocking probability from the calculated candidate blocking probabilities, and use a base station corresponding to the selected object blocking probability as an object base station to which the association is transferred, so that the object relay node changes to be associated with the object base station to which the association is transferred.

Abstract: Disclosed are a communication control device, a communication control method and the system thereof, which provide efficient multi-base station joint services in a mobile communication system using dynamic clustering. Optimal base station clustering is chosen according to the communication state between a terminal and each base station. The communication control device connects with multiple base stations through a network, and clusters the multiple base stations dynamically so that the clustered multiple base stations can provide services for the mobile terminal in union. The communication control device comprises: an interface, connecting with multiple base stations, receiving channel state information related to the mobile terminal from each base station; a memory unit, storing the channel state information of the mobile terminal received from the interface; a control unit, clustering each base station dynamically according to the channel state information of the mobile terminal stored in the memory unit.

Abstract: It is provided are a server including: a storage module for storing original files and characteristics of the original files; an encoding module for encoding the original files stored in the storage module to generate encoded symbols; an information acquisition module for communicating with at least one transmission node and acquiring state information from the at least one transmission node; a control module for calculating a number of the encoded symbols to be sent to the at least one transmission node for caching based on the characteristics of the original files stored in the storage module and the state information of the at least one transmission node acquired by the information acquisition module; and a communication module for sending the encoded symbols to the at least one transmission node based on the number of the encoded symbols calculated by the control module.

Abstract: Provided are a hyper-cellular communication system and a hyper-cellular communication method for associating a user to a macro cell base station or a micro cell base station. The hyper-cellular communication system includes: a gateway, which includes a user quality of service classification index table including two parameters, namely user mobility and signaling overhead; and a resource optimization function unit for making decisions on base station association and wireless resource allocation by referring to the quality of service classification index table.

Abstract: It is provided a renewable energy base station, which is used in a wireless cellular system, including: an adjustment request determining part for determining whether an adjustment to a coverage area is required; an adjustment request transceiver in case where it is determined that the adjustment to the coverage area is required, sending a coverage area adjustment request to neighboring base stations in the wireless cellular system, and receiving an adjustment request response from the neighboring base stations; an adjustment request responding part for determining whether the coverage area adjustment request from the one of the neighboring base stations is allowed in case where receiving the coverage area adjustment request from one of the neighboring base stations; and a response transmitter for sending the adjustment request response to the neighboring base stations based on a result of the determination made by the adjustment request responding part.

Abstract: Provided is a micro base station to be used in a heterogeneous cellular network. The micro base station has resources including frequency bands and time slots and being available for a user to use. The heterogeneous cellular network includes a plurality of base stations including a macro base station and the micro base station. The micro base station includes: an information acquiring part configured to acquire configuration information and load information of the micro base station, and to acquire configuration information and load information of a neighboring base station adjacent to the micro base station from the neighboring base station; and a resource selection part configured to select a part of the resources from the resources to provide the selected part of the resources to the user based on the configuration information and the load information of the micro base station and the neighboring base station.

Abstract: It is provided a base station included in a cellular network system together with other neighboring base stations, which provides information service to a user terminal. The base station comprising: a determination unit for comparing states of traffic currently provided by said base station and other neighboring base stations and determining whether said base station has the lowest traffic; an information transmission unit for sending a sleep request and a handover request for handing over the user terminal associated with said base station to one of the neighboring base stations in case where the determination unit determines that the traffic currently provided by the base station is lowest; a receiving unit for receiving feedback information sent from the one of the neighboring base stations after admission control; and an executing unit for executing sleep decision after receiving handover request permitting information from the neighboring base station.

Abstract: Disclosed are a communication control device, a communication control method and the system thereof, which provide efficient multi-base station joint services in a mobile communication system using dynamic clustering. Optimal base station clustering is chosen according to the communication state between a terminal and each base station. The communication control device connects with multiple base stations through a network, and clusters the multiple base stations dynamically so that the clustered multiple base stations can provide services for the mobile terminal in union. The communication control device comprises: an interface, connecting with multiple base stations, receiving channel state information related to the mobile terminal from each base station; a memory unit, storing the channel state information of the mobile terminal received from the interface; a control unit, clustering each base station dynamically according to the channel state information of the mobile terminal stored in the memory unit.

Abstract: A communication control server of the present invention comprises: a network interface; a memory unit in which a cluster information table and a channel state information table are stored; a channel state information recovery unit acquiring a feedback message of a user equipment within a cluster from a base station via a network interface, wherein the cluster information table holds a joint codebook shared by the base stations within the cluster, wherein the joint codebook holds an identifier for determining channel state information and a distribution of the channel state information, and wherein the feedback message includes an identifier corresponding to the channel state information of the user equipment.

Abstract: A subchannel scheduling method in a multi-user MIMO-OFDM environment modifies proportional fairness scheduling specifications and maximizes a system throughput under conditions that a minimum data transmission rate required by a multimedia user be ensured. In a method for allocating subchannels in a wireless network, plural users are subscribed in the wireless network, a base station has NT transmission antennas, a user i has NR reception antennas, a network capacity determined by the NT transmission antennas and K subcarrier groups is divided into K transmission subchannel groups, and a network bandwidth determined by the NT transmission antennas is divided into the K subchannel groups. The base station sequentially allocates channels to the users on the basis of a proportional value of a data transmission rate supported to each user and an average throughput of each user in a predetermined time and a service quality required by each user.

Abstract: Methods of routing data within a wireless communication system are provided. In the example methods and system, data packets may be routed to and/or between any node within a Mobile Ad-Hoc Network (MANET), such as a network running Ad-hoc On-demand Distance Vector (AODV) protocol, and an external connection or device (e.g., an Internet entity) if at least one node within the MANET includes a connection to the external connection or device. Accordingly, a single “connected” MANET node may share its external connections with non-connected nodes.

Abstract: A handoff method of wireless LAN comprises the steps of: 1) immediately starting by a mobile terminal to count time from a time point of entering the wireless LAN or building the new association, that is, when building association with a certain access point; 2) always tracking a signal-to-noise ratio (SNR) of the old access point by the mobile terminal, and once the mobile terminal starts getting weak, starting to search for a near access point and making a preparation for handoff, and issuing a probe request signal to a new access point, and always responding to a probe response message by the new access point after receiving the probe request signal; and 3) judging by the mobile terminal whether or not to associate the new access point according to a signal strength and an association time of each of the access points, and if a judging result is yes, issuing the reassociation request signal to the new access point.