Unlicensed carrier contention method and apparatus
View Patent ↗An unlicensed carrier contention method and apparatus are provided. The method comprises that: a Licensed Assisted Access (LAA) device implements a Clear Channel Assessment (CCA) or an Evolution Clear Channel Assessment (eCCA) on a channel; if the result of the assessment is ‘idle’, the LAA device decrement N and determines whether or not the decremented N is greater than 0, wherein N is a natural number; and if the result of the determination indicates that the decremented N is not greater than 0, the LAA device uses an unlicensed carrier for data transmission. The disclosure addresses the problem that no contention withdrawal mechanism or procedure suitable for an LAA system is provided in the conventional art.
1. An unlicensed carrier contention method, comprising:
performing, by a Licensed Assisted Access (LAA) device, a Clear Channel Assessment (CCA) on a channel, and after sensing the channel is idle during the CCA, proceeding to execute the following operations:
S 1 : if a random withdrawal number N>0, decrementing, by the LAA device, N by one, wherein N is randomly generated by the LAA device or configured by another device and is a nonnegative integer;
S 2 : sensing, by the LAA device, the channel through the CCA and executing S 3 if the channel is sensed to be idle, otherwise executing S 4 ;
S 3 : if N=0, using, by the LAA device, an unlicensed carrier for data transmission, otherwise executing S 1 ;
S 4 : sensing, by the LAA device, the channel through the CCA; and
S 5 : if the channel is sensed to be idle, executing S 1 or S 3 by the LAA device, otherwise executing S 4 by the LAA device,
wherein the CCA performed by the LAA device in S 2 is one CCA of an extended Clear Channel Assessment (eCCA), and
wherein the CCA performed by the LAA device in S 4 is the same as the CCA initially performed by the LAA device, both being initial CCAs.
2. The method according to claim 1 , wherein the CCA includes at least one of: an initial CCA or the eCCA.
3. An unlicensed carrier contention apparatus, applied to a Licensed Assisted Access (LAA) device side and comprising:
a memory for storing computer-readable instructions;
a processor executing the computer-executable instructions to implement a plurality of program modules, wherein the plurality of program modules comprises: a first detection module, a first determination module, a first processing module, a transmission module, a second detection module, a first triggering module and a first generation module,
wherein the first detection module is configured to perform a Clear Channel Assessment (CCA) on a channel, and after sensing the channel is idle during the CCA, the apparatus functions through the following modules:
the first determination module configured to decrement a random withdrawal number N by one if N>0, wherein N is randomly generated by the first generation module of the LAA device or configured by another device and is a nonnegative integer;
the first processing module configured to sense the channel through the CCA, and function through the transmission module if the channel is sensed to be idle, otherwise function through the second detection module;
the transmission module configured to use an unlicensed carrier for data transmission if N=0, otherwise function through the first detection module;
the second detection module configured to sense the channel through the CCA; and
the first triggering module configured to activate the first detection module or the processing module if the channel is sensed to be idle, otherwise activate the second detection module,
wherein the CCA performed in the first processing module is one CCA of an extended Clear Channel Assessment (eCCA),
wherein the CCA performed in the second detection module is an initial CCA, and
wherein the CCA performed in the first detection module is the initial CCA.
4. The apparatus according to claim 3 , wherein the CCA includes at least one of: the initial CCA or the eCCA.
5. An unlicensed carrier contention method, comprising:
performing, by a Licensed Assisted Access (LAA) device, a Clear Channel Assessment (CCA) on a channel, and after sensing the channel is idle during the CCA, executing, by the LAA device, the following operations:
S 1 : executing S 4 by the LAA device;
S 2 : if a random withdrawal number N>0, decrementing, by the LAA device, N by one, wherein N is randomly generated by the LAA device or configured by another device and is a nonnegative integer;
S 3 : sensing, by the LAA device, the channel through the CCA, and executing S 4 if the channel is sensed to be idle, otherwise executing S 5 ;
S 4 : if N=0, using, by the LAA device, an unlicensed carrier for data transmission, otherwise executing S 2 ;
S 5 : sensing, by the LAA device, the channel through the CCA; and
S 6 : if the channel is sensed to be idle, executing S 2 or S 4 by the LAA device, otherwise executing S 5 by the LAA device,
wherein the CCA performed by the LAA device in S 3 is one CCA of an extended Clear Channel Assessment, eCCA, and
wherein the CCA performed by the LAA device in S 5 is the same as the CCA initially performed by the LAA device, both being initial CCAs.
6. The method according to claim 5 , wherein the CCA includes at least one of: the initial CCA or the eCCA.
7. An unlicensed carrier contention apparatus, applied to a Licensed Assisted Access (LAA) device side and comprising:
a memory for storing computer-readable instructions;
a processor executing the computer-executable instructions to implement a plurality of program modules, wherein the plurality of program modules comprises: a third detection module, a second triggering module, a second determination module, a second processing module, a fourth detection module, a third triggering module and a second generation module,
wherein the third detection module is configured to perform a Clear Channel Assessment (CCA) on a channel, and after sensing the channel is idle during the CCA, the apparatus continues to function through the following modules:
the second triggering module configured to activate the second processing module;
the second determination module configured to decrement a random withdrawal number N by one if N>0, wherein N is randomly generated by the second generation module of the LAA device or configured by another device and is a nonnegative integer;
the third detection module configured to sense the channel through the CCA and activate the second processing module if the channel is sensed to be idle, otherwise activate the fourth detection module;
the second processing module configured to use an unlicensed carrier for data transmission if N=0, otherwise activate the second determination module;
the fourth detection module configured to sense the channel through the CCA; and
the third triggering module configured to activate the second triggering module or the second processing module if the channel is sensed to be idle, otherwise activate the fourth detection function,
wherein the CCA performed in the third detection module is one CCA of an extended Clear Channel Assessment (eCCA), and
wherein the CCA performed in the fourth detection module is the same as the CCA initially performed by the third detection module, both being initial CCAs.
8. The apparatus according to claim 7 , wherein the CCA includes at least one of: the initial CCA or the eCCA.