Method and apparatus for transmitting uplink channel, and method and apparatus for transmitting downlink channel

Abstract

The invention provides a method and apparatus for transmitting an uplink channel, and a method and apparatus for transmitting a downlink channel, applied to a communication system comprising a networkdevice and a terminal device. A system frequency domain resource is divided into N sub-bands, N is greater than or equal to 2, the system frequency domain resource is used according to a competitivemechanism, and the method for transmitting the uplink channel comprises the following steps: the terminal device receives scheduling information from the network device, wherein the scheduling information is used for indicating uplink time-frequency resources for carrying at least one uplink channel, the first uplink channel is carried on the first uplink time-frequency resource, the first uplinktime-frequency resource occupies M sub-bands in the N sub-bands on the frequency domain, and M is greater than or equal to 2; the terminal device detects the M sub-bands to determine a second uplink time-frequency resource that can be used by the terminal device from the first uplink time-frequency resource, wherein the second uplink time-frequency resource occupies K sub-bands in the M sub-bands,and K is less than M and is greater than or equal to 1; and the terminal device sends the first uplink channel through the second uplink time-frequency resource.

Description

technical field [0001] The present application relates to the communication field, and more specifically, to a method and device for transmitting an uplink channel and a method and device for transmitting a downlink channel. Background technique [0002] With the development and popularization of communication technology, the number of terminal devices has increased significantly. The licensed spectrum resources that the current communication system can provide have been difficult to meet the demand. In the case of a large number of terminal devices sharing the same licensed spectrum resource, it may lead to communication congestion. Serious It affects the reliability of communication and user experience. [0003] In order to solve the above problems, a communication technology based on license-free spectrum resources has emerged. In this technology, the bandwidth of a single carrier of the system is 20 megahertz (Mega Hertz, MHz). The network device allocates frequency dom...

AI Technical Summary

Problems solved by technology

Since the bandwidth of a single carrier in the system is very large, the probability that the network device or terminal device will compete for the entire bandwidth of the carrier is low, and furthermore, the possibility that the network device or terminal device can use the frequency domain resource #1 for wireless communication is also low. Therefore, it reduces the communication efficiency on the license-free spectrum, increases the service transmission delay of the terminal equipment, and seriously affects the user experience of the terminal equipment.

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