Explicit outband signaling method in a wireless network supporting cognitive radio technology
AssigneesSamsung Electronics Co., Ltd., Inha-Industry Partnership Institute
InventorsJunhong Hui, Jae-Myeong Kim, Sang-Jo Yoo, Duck-Dong Hwang, Jae-Hak Chung, Kwon-Moon No
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Abstract
An explicit outband signaling method for detecting sharable resources for management of public resources in a wireless network supporting Cognitive Radio (CR) technology. To this end, the invention transmits state information for the current channel to a CR system in order to enable communication of the CR users, whose communication with the CR system is impossible due to an influence of an incumbent system, thereby allowing the CR system to stop the use of the interference channel, and to provide a corresponding service with another channel.
Claims33
An outband signaling method in a wireless network supporting Cognitive Radio (CR) technology, the method comprising:
- providing, by a base station in the wireless network, a communication service for a user equipment using a first channel allocated with public wireless resources;
- periodically broadcasting, by the base station, resource allocation information through at least one unused channel allocable with currently unused wireless resources out of the public wireless resources;
- receiving channel state information from the user equipment using a second channel on which the user equipment detects the resource allocation information;
- determining that the first channel is used by an incumbent base station if the channel state information indicates that the user equipment fails to decode data transmitted through the first channel;
- and
- replacing the first channel providing the communication service with another channel in response to the channel state information,
- wherein the resource allocation information includes information including at least one channel used by the base station from among the public wireless resources.
An outband signaling method in a wireless network supporting Cognitive Radio (CR) technology, the method comprising:
- receiving, by a user equipment in the wireless network, a communication service from a base station, using a first channel allocated with public wireless resources;
- searching, by the user equipment, for another channel upon failure to decode data for the communication service transmitted through the first channel, and detecting resource allocation information which is periodically broadcasted from the base station through at least one unused channel allocable with currently unused wireless resources out of the public wireless resources;
- and
- reporting channel state information by the user equipment to the base station using a second channel on which the user equipment detects the resource allocation information in response to detecting the resource allocation information, wherein the channel state information includes information reporting the failure to decode the data and indicating that the first channel is used by an incumbent base station,
- wherein the resource allocation information includes information indicating at least one channel used by the base station from among the public wireless resources.
A client device comprising:
- a receiver to receive a communication service from a base station using a first channel allocated with public wireless resources;
- a controller to search for another channel upon failure to decode data for the communication service transmitted through the first channel and to receive resource allocation information which is periodically broadcasted from the base station through at least one unused channel allocable with currently unused wireless resources out of the public wireless resources;
- and
- a transmitter to transmit channel state information using a second channel on which the resource allocation information is detected in response to detecting the resource allocation information, the channel state information including information reporting the failure to decode the data and indicating that the first channel is used by an incumbent base station,
- wherein the resource allocation information includes information indicating at least one channel used by the base station from among the public wireless resources.
A base station comprising:
- a transceiver to provide a communication service to a client device using a first channel allocated with public wireless resources, to periodically broadcast resource allocation information through at least one unused channel allocable from currently unused wireless resources, and to receive channel state information from the user equipment using a second channel on which the user equipment detects the resource allocation information;
- and
- a controller to determine that the first channel is used by an incumbent base station if the channel state information indicates that the user equipment fails to decode a data signal transmitted through the first channel and to control the transceiver to communicate with the client device using another channel in response to the channel state information.
Dependencies are inferred from the claim text.