Method and apparatus for synchronizing quiet period in cognitive radio system
AssigneeSamsung Electronics Co., Ltd.
InventorsCheng Shan, Eun-Taek Lim, Jung-Soo Woo, Ho-Dong Kim, Sang-Bum Kim, Yong-Ho Park
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Abstract
A method and apparatus for synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system includes receiving QP information based on a channel N from at least one neighbor BS. The method further includes determining whether the channel N is an in-band channel. If the channel N is the in-band channel, QP scheduling is performed according to the received QP information based on the channel N.
Claims14
A method of synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system, the method comprising:
- receiving, by a Base Station (BS), QP synchronization information on a channel N from at least one neighbor BS;
- decoding the QP synchronization information;
- determining whether the channel N is an in-band channel using the QP synchronization information;
- if the channel N is the in-band channel, determining whether the BS is currently synchronized based on another QP synchronization information on a channel M and the synchronized another QP synchronization information is broadcasted, or determining whether the QP synchronization information is received from a plurality of neighbor BSs;
- and
- if the BS is not currently synchronized based on another QP synchronization information on a channel M and the synchronized another QP synchronization information is not broadcasted, or the QP synchronization information is not received from a plurality of neighbor BSs, synchronizing a QP of the channel N, based on the QP synchronization information.
A Base Station (BS) apparatus for synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system, the apparatus comprising:
- a receiver configured to receive QP synchronization information on a channel N from at least one neighbor BS and to decode the QP synchronization information;
- a controller configured to determine whether the channel N is an in-band channel using the QP synchronization information and to determine whether the BS is currently synchronized based on another QP synchronization information on a channel M and the synchronized another QP synchronization information is received from a plurality of neighbor BSs, if the channel N is the in-band channel;
- and
- a QP scheduling manager configured to synchronize a QP of the channel N, based on the QP synchronization information, if the BS is not currently synchronized based on another QP information is not broadcasted, or the QP synchronization information is not received from a plurality of neighbor BSs.
A method of synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system, the method comprising:
- receiving, by a Base Station (BS) using a channel M, QP synchronization information on a channel N from a neighbor BS;
- determining whether the channel N is an in-band channel using the QP synchronization information on a channel N;
- if the channel N is the in-band channel, determining whether another QP synchronization information is previously broadcasted or QP synchronization information is received from a plurality of another neighbor BSs;
- if another QP synchronization information is previously broadcasted or QP synchronization information is received from a plurality of other neighbor BSs, determining new QP synchronization information according to QP information having an early QP start time and broadcasting the new QP synchronization information;
- and
- if another QP synchronization information is not previously broadcasted or QP synchronization information is not received from the plurality of other neighbor BSs, broadcasting the QP synchronization information on a channel N.
An apparatus for synchronizing a Quiet Period (QP) in a Cognitive Radio (CR) system, the apparatus comprising:
- a receiver configured to receive QP synchronization information on a channel N from a neighbor BS;
- a controller configured to determine whether the channel N is an in-band channel using the QP synchronization information on a channel N, and if the channel N is the in-band channel, determine whether another QP synchronization information is previously broadcasted or QP synchronization information is received from a plurality of other neighbor BSs;
- and
- a QP scheduler configured to determine new QP synchronization information according to QP information having an early QP start time and broadcast the new QP synchronization information, if another QP synchronization information is previously broadcasted or QP synchronization information is received from the plurality of other neighbor BSs and if another QP synchronization information is not previously broadcasted or QP synchronization information is not received from a plurality of another neighbor BSs, the QP scheduler broadcasts the QP synchronization information on a channel N.
Dependencies are inferred from the claim text.