Method and system for access to unlicensed spectrum by transmit points
AssigneeHuawei Technologies Co., Ltd.
InventorsMohamed Adel Salem, Jiayin Zhang
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Abstract
Methods and systems for access to unlicensed spectrum are described. Each of one or more transmit points (TPs), transmit over an unlicensed spectrum a downlink transmission starting at a downlink transmission starting time after a successful clear channel assessment (CCA) process of each of the one or more TPs. For each of the one or more TPs, the successful CCA process has a CCA process starting time enabling the successful CCA process to be completed at the downlink transmission starting time. The one or more TPs may be licensed assisted access (LAA) TPs, and the starting time corresponds to a starting time of a licensed spectrum subframe.
Claims22
A method for downlink transmission via unlicensed spectrum by one or more transmit points (TPs), the method comprising:
- transmitting over the unlicensed spectrum, by each of the one or more TPs, a downlink transmission starting at a downlink transmission starting time after a successful clear channel assessment (CCA) process, wherein for each of the one or more TPs, the successful CCA process has a CCA process starting time enabling the successful CCA process to be completed at the downlink transmission starting time.
A method for access to an unlicensed spectrum by one or more transmit points (TPs) associated with a controller, the method comprising:
- receiving from each of the one or more TPs, by the controller, a downlink transmission starting time;
- and
- transmitting, by the controller, to each of the one or more TPs, a common downlink transmission starting time, when the downlink transmission starting time is different from the common downlink transmission starting time, wherein each of the one or more TPs is configured to transmit over the unlicensed spectrum a downlink transmission starting at a downlink transmission starting time after a successful clear channel assessment (CCA) process, wherein for each of the each of the one or more TPs, the successful CCA process has a CCA process starting time enabling the respective successful CCA process to be completed at the common downlink transmission starting time.
A transmission point (TP) for access to an unlicensed spectrum, the TP comprising a processor configured to execute instructions that cause the TP to:
- transmit over the unlicensed spectrum, by the TP, a downlink transmission starting at a downlink transmission starting time after a successful clear channel assessment (CCA) process of the TP, wherein the successful CCA process has a CCA process starting time enabling the successful CCA process to be completed at the downlink transmission starting time.
A controller associated with one or more transmission points (TPs) for the one or more TPs to access to unlicensed spectrum, the controller comprising a processor configured to execute instructions that cause the controller to:
- transmit, to each of the one or more TPs, a downlink transmission starting time, wherein each of the one or more TPs is configured to:
- transmit over the unlicensed spectrum, by each of the one or more TPs, a downlink transmission starting at a downlink transmission starting time after a successful clear channel assessment (CCA) process, wherein for each of the one or more TPs, the successful CCA process has a CCA process starting time enabling the respective successful CCA process to be completed at the downlink transmission starting time.
Dependencies are inferred from the claim text.