Uplink Subframe Transmission Mode Indication Flexibility
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Solution Overview
Problem
In FeLAA technology, the indication flexibility of uplink subframe transmission modes is limited due to conflicts between partial subframe transmission modes, leading to reduced channel access opportunities and increased control signaling overheads.
Innovation Solution
A communication method that uses scheduling information with multiple indication fields to allow network devices to indicate multiple uplink subframe transmission modes, enabling terminal devices to adapt their transmission behavior for conflicting modes, thereby improving indication flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network device indicates multiple partial subframe transmission modes to the terminal device, then the transmission flexibility is improved, but the indication fields conflict with each other
Solution Approach 1:
The scheduling information is divided into multiple independent indication fields, where each field indicates a specific transmission mode (first mode, second mode, third mode) separately. This segmentation allows the network device to indicate multiple transmission modes without conflict, as each mode has its own independent indication field that can be set independently.
Solution Approach 2:
The patent introduces a new dimension to the indication mechanism by adding separate indication fields for different transmission modes. Instead of using a single indication field that causes conflicts, the system uses multiple indication fields arranged in a dimensional expansion, allowing simultaneous indication of multiple modes without interference.
2Device complexity
If the network device restricts simultaneous enablement of conflicting transmission modes, then the indication conflicts are avoided, but the indication flexibility is reduced
Solution Approach 1:
By segmenting the indication into separate fields for each transmission mode, the system eliminates the need to restrict simultaneous enablement. Each indication field operates independently, allowing the network device to indicate multiple modes simultaneously without causing conflicts, thus maintaining full indication flexibility.
Solution Approach 2:
The patent uses multiple copies of indication fields, each corresponding to a different transmission mode. This copying approach allows independent indication of each mode without interference, enabling the network device to indicate multiple modes simultaneously while avoiding conflicts.
3Ease of manufacture
If the terminal device uses existing partial subframe transmission process, then the implementation is simple, but the channel access opportunities are reduced
Solution Approach 1:
The scheduling information structure is designed to be universal, supporting multiple transmission modes (first mode, second mode, third mode) through a common framework of multiple indication fields. This multi-functional design allows the terminal device to handle various transmission modes using the same basic processing mechanism, maintaining implementation simplicity while enabling multiple channel access opportunities.
Solution Approach 2:
The system dynamically adapts to different transmission modes through the multiple indication fields, allowing the terminal device to select the appropriate mode based on real-time conditions. This dynamic capability increases channel access opportunities without significantly complicating the implementation, as the terminal device can flexibly interpret the indication fields according to the scheduled transmission mode.
Data Source
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AI summary
This application provides a communication method and a communications apparatus. The method includes: receiving scheduling information from a network device, where the scheduling information is used to indicate at least one uplink subframe, and the scheduling information includes a first indication field and a second indication field, the first indication field is used to indicate whether each of the at least one uplink subframe is applicable to a first mode, and the second indication field is used to indicate whether a first uplink subframe is applicable to a second mode; and when the first indication field indicates that each of the at least one uplink subframe is applicable to the first mode and the second indication field indicates that the first uplink subframe is applicable to the second mode, sending first uplink information in the first uplink subframe by using the second mode. The communication method in embodiments of this application helps improve indication flexibility of a transmission mode of an uplink subframe. The method provided in the embodiments may be applied to a communications system, for example, the V2X, the LTE-V, the internet of vehicles, the MTC, the IoT, the LTE-M, the M2M, or the internet of things.