Uplink Preamble and Data Resource Mapping for Wireless Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in performing contention-based signal transmission and reception efficiently, particularly in high-mobility and high-reliability scenarios like 5G, where low latency and high reliability are critical, and collision probabilities increase with high packet arrival rates.
Innovation Solution
The method involves transmitting and receiving uplink signals using multiple preambles, each associated with multiple data resource regions, allowing for repeated data transmission and reception in these regions, and applying spreading sequence codes to improve contention-based data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contention-based data transmission is performed in conventional wireless communication systems, then device complexity and operation simplicity are maintained, but collision probability increases and transmission reliability deteriorates in high-mobility and high-packet-arrival-rate scenarios
Solution Approach 1:
The data transmission process is segmented into multiple repetitions across different resource regions. Each repetition is associated with a preamble, allowing the system to divide the transmission task into manageable units that can be independently handled, thereby improving reliability without significantly increasing overall device complexity
Solution Approach 2:
Preambles are transmitted before data to establish resource region associations in advance. This preliminary action allows the receiver to prepare for upcoming data transmissions and enables the system to adapt to channel conditions before actual data transfer, improving transmission reliability in challenging scenarios
2Measurement precision
If multiple preambles with associated data resource regions are used for contention-based transmission, then transmission accuracy and efficiency are improved, but the complexity of resource management increases
Solution Approach 1:
The system changes parameters such as the number of preamble repetitions and resource region associations based on channel conditions and packet arrival rates. This allows dynamic adaptation to improve transmission accuracy while managing complexity through parameter optimization rather than structural changes
Solution Approach 2:
The system uses feedback from channel conditions and transmission outcomes to adjust preamble selection and resource region allocation. This feedback mechanism enables the system to improve transmission accuracy by learning from past performance while keeping resource management complexity manageable through adaptive rather than exhaustive approaches
3Reliability
If data is repeatedly transmitted in multiple data resource regions, then transmission reliability is improved, but transmission time and latency increase
Solution Approach 1:
Data transmission is performed periodically across multiple resource regions with structured repetition patterns. This periodic approach allows the system to achieve reliability through multiple attempts while optimizing the timing and distribution of repetitions to minimize overall latency
Solution Approach 2:
The number of repetitions and resource region selections are made dynamic based on channel conditions and packet characteristics. This allows the system to adapt the level of repetition to actual needs, improving reliability when necessary while reducing unnecessary repetitions that would increase latency
Data Source
AI summary
A method by which a terminal transmits an uplink signal in a wireless communication system, according to one embodiment of the present invention, includes: transmitting any one of a plurality of preambles; and performing a contention-based transmission of data in consideration of the transmitted preamble, wherein each of the plurality of preambles is linked with a plurality of data resource areas, and when the contention-based transmission of data is performed, the terminal can repeatedly transmit the data through the plurality of data resource areas linked with the transmitted preamble. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.