Wireless Transmission Mode Indication for BWP Channel Access
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Solution Overview
Problem
There is a challenge in efficiently informing User Equipment (UE) about the transmission mode used in communications between a network device and the UE, which affects UE behavior and communication efficiency.
Innovation Solution
The proposed solution involves a wireless communication method where the network device transmits a first indication to the UE, allowing the UE to determine the transmission mode. This mode can be either the first transmission mode, where the network device performs transmission in a Bandwidth Part (BWP) after Clear Channel Assessment (CCA), or the second transmission mode, where transmission occurs in one or more BWP parts that have passed CCA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network device transmits detailed configuration information for multiple transmission modes to the UE, then the UE can accurately determine the transmission mode and behave appropriately, but the signaling overhead and communication complexity increase
Solution Approach 1:
The patent extracts only the essential transmission mode indication from the full configuration information. Instead of transmitting complete mode descriptions, the network device sends a compact transmission mode indicator that the UE uses to determine the appropriate transmission mode, reducing signaling overhead while maintaining determination accuracy
Solution Approach 2:
The patent uses a simplified representation (transmission mode indicator) that copies only the necessary information from the full transmission mode configuration. This indicator serves as a lightweight reference that enables the UE to reconstruct the appropriate transmission behavior without receiving complete mode details
2Reliability
If the network device uses a first transmission mode where transmission occurs after the entirety of the BWP passes CCA, then channel access reliability is improved, but the transmission opportunity and communication efficiency may be reduced
Solution Approach 1:
The patent makes the transmission mode dynamic by allowing the network device to select between first and second transmission modes based on channel conditions and communication requirements. The transmission mode indicator enables flexible switching between conservative (first mode) and aggressive (second mode) channel access strategies, optimizing both reliability and efficiency根据不同场景
Solution Approach 2:
The patent changes the channel access parameter (CCA scope) based on the transmission mode. In the first mode, the CCA is performed over the entire BWP for high reliability, while in the second mode, the CCA scope is adjusted to enable faster access. This parameter adaptation allows the system to balance reliability and efficiency by modifying channel access behavior according to the selected transmission mode
3Productivity
If the network device uses a second transmission mode where transmission occurs in individual BWP parts that have passed CCA, then transmission opportunities increase and efficiency improves, but channel access reliability may be compromised
Solution Approach 1:
The patent segments the BWP into multiple parts and applies different CCA outcomes to each segment. In the second transmission mode, individual BWP parts that pass CCA can be transmitted independently, allowing the system to exploit available channel opportunities in a distributed manner, thereby improving efficiency while maintaining acceptable reliability through localized access decisions
Data Source
AI summary
The present disclosure provides a wireless communication method applied in a User Equipment (UE). The method includes: obtaining a first indication from a network device, the first indication being used for indicating a transmission mode; and determining the transmission mode based on the first indication. The transmission mode is used for communications between the network device and the UE, and is a first transmission mode or a second transmission mode. In the first transmission mode, the network device performs transmission in a Bandwidth Part (BWP) including a plurality of BWP parts, to which Listen Before Talk (LBT) is to be applied, after an entirety of the BWP has passed Clear Channel Assessment (CCA). In the second transmission mode, the network device performs transmission in one or more BWP parts of the plurality of BWP parts that have passed CCA.