摘要:
Provided is a communication system that includes setting a detection threshold according to a distribution of at least one logic value of a transmission signal corresponding to an on-off keying (OOK) scheme or a frequency shift keying (FSK) scheme, and determining a type of noise source influencing a reception signal using the detection threshold and the distribution of at least one logic value.
摘要:
A cognitive radio communication terminal including a transmission processing unit to divide data by a quiet time slot that is allocated at a first point in time of a collision detection period, to transmit at least one portion of the divided data to a reception side, and a sensing unit to determine whether at least one of a feature information and an energy of another terminal is detected in a channel with the reception side during the quiet time slot of the first point in time. Where neither the feature information nor the energy of the other terminal is detected based on a determination of the sensing unit, the transmission processing unit transmits the remaining divided data.
摘要:
A precoding method for a femtocell or a picocell and a communication system using the same is provided. The communication system may include a small base station that is able to implement a protection mode to protect a neighbor terminal from an interference regardless of whether a neighbor base station is performing a process to protect the neighbor terminal from the interference. Also, the small base station may use at least one process scheme appropriate for a current environment among various process schemes, thereby effectively protecting the neighbor terminal from the interference.
摘要:
A precoding method for a femtocell or a picocell and a communication system using the same is provided. The communication system may include a small base station that is able to implement a protection mode to protect a neighbor terminal from an interference regardless of whether a neighbor base station is performing a process to protect the neighbor terminal from the interference. Also, the small base station may use at least one process scheme appropriate for a current environment among various process schemes, thereby effectively protecting the neighbor terminal from the interference.
摘要:
A cognitive radio communication terminal including a transmission processing unit to divide data by a quiet time slot that is allocated at a first point in time of a collision detection period, to transmit at least one portion of the divided data to a reception side, and a sensing unit to determine whether at least one of a feature information and an energy of another terminal is detected in a channel with the reception side during the quiet time slot of the first point in time. Where neither the feature information nor the energy of the other terminal is detected based on a determination of the sensing unit, the transmission processing unit transmits the remaining divided data.
摘要:
A mini base station connectable with the Internet including a frequency recognition unit to recognize a frequency band of an external signal transmitted from a cellular base station; and an operation frequency determination unit to determine an operation frequency band according to interference generated with the cellular base station based on the recognized frequency band of the external signal.
摘要:
An operation method of a radio communication station is provided. The operation method of a radio communication station, the operation method including: transmitting a basic pilot signal to at least one terminal located in a coverage of a preoccupied system; and transmitting a cognitive radio (CR) pilot signal.
摘要:
Provided are a hub, a relay node, and a node for reconfiguring an active time position of a node in a WBAN. An active time position of the node may be reconfigured based on information associated with an active time position of a candidate relay node that the node desires to use as a relay node.
摘要:
A cognitive radio communication apparatus and method to control a sensing operation. The cognitive radio communication apparatus includes an information receiver to receive channel state information associated with a channel occupancy state of a primary system from at least one sensing node of a secondary system; a sensing control unit to control a sensing period of the at least one sensing node according to a change pattern of the channel occupancy state, based on the channel state information; and a control information transmitter to transmit control information associated with the controlled sensing period to at least one member node of the secondary system.
摘要:
A communication system and method that receives data from a terminal using a cooperative reception scheme, is provided. Each terminal may generate multi-cell transmission data used for overcoming transmission delay and transmit, to each base station, a data frame including the multi-cell transmission data.