Channel access method and apparatus
A channel access method and channel preemption technology, applied in the field of channel access methods and devices, can solve problems such as spectrum resources not being allocated and used, achieve the effects of ensuring coexistence and performance, ensuring directional signal transmission, and improving system capacity
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Embodiment 1
[0052] The network element executes random backoff LBT to preempt the channel. After the preemption is successful, the signal transmission is performed in the first TTI within the maximum channel occupation time MCOT; the network element executes before at least one other TTI within the maximum channel occupation time MCOT. Non-random backoff LBT performs channel preemption.
[0053] refer to Figure 2a , 2b, the method includes:
[0054] 101. The network element executes Cat-4 LBT to preempt the channel. After the preemption succeeds, the signal is transmitted in the first TTI in the MCOT;
[0055] The network element can be a network device or a terminal device. If signal transmission is to be performed, first perform Cat-4 LBT, such as Figure 2a , as shown in 2b at T 1 Execute Cat-4 LBT within a certain period of time, that is, after an LBT operation, if the channel is not successfully accessed, back off for a random window length and then continue the LBT operation. Af...
Embodiment 2
[0068] The network element performs omnidirectional or directional random backoff LBT to preempt the channel. After the preemption is successful, the first TTI within the maximum channel occupation time MCOT performs directional signal transmission; Before one TTI, perform directional non-random backoff LBT for channel preemption. Random backoff LBT can be omni-directional random backoff LBT, or directional random backoff LBT, non-random backoff LBT is directional non-random backoff LBT, and the signal transmission of each TTI is directional signal transmission.
[0069] refer to Figure 3a , 3b, the method comprising:
[0070] 201. The network element performs omnidirectional or directional Cat-4 LBT to preempt the channel. After the preemption succeeds, the directional signal transmission is performed in the first TTI in the MCOT;
[0071] The network element can be a network device or a terminal device. If signal transmission is to be performed, first perform Cat-4 LBT, w...
Embodiment 3
[0084] The first network element performs random backoff LBT to preempt the channel. After the preemption is successful, the first network element notifies the second network element of the frame structure information of the corresponding TTI within at least one TTI within the maximum channel occupation time MCOT, so as to facilitate the The second network element performs directional signal transmission in the corresponding TTI.
[0085] For example: multiple consecutive TTIs can be scheduled for data transmission in the same beam direction, network devices can transmit data to the same terminal device in the same beam direction in multiple consecutive TTIs, or can send data to Different terminal devices in the same beam direction perform data transmission. Different from Embodiments 1 and 2, there is no need to perform Cat-2 LBT operation between multiple TTIs scheduled for data transmission in the same beam direction.
[0086] refer to Figure 4 , taking the signal transm...
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