Reference Signal Timing Adjustment Based on Delay Value
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G technology, face challenges in efficiently determining the time division location for transmitting reference signals based on delay values, which affects the synchronization and performance of uplink communications between user equipment (UE) and base stations.
Innovation Solution
The method involves configuring a delay value to determine the time division location for transmitting reference signals, such as demodulation reference signals (DM-RS), within a slot in wireless communication technology, allowing for flexible timing adjustments based on the delay value, enabling accurate synchronization of uplink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed symbol index is used for DM-RS transmission in legacy LTE, then the transmission timing is simple and deterministic, but the system lacks flexibility to support different delay values (K2) between uplink grant reception and uplink communication transmission
Solution Approach 1:
The patent makes the DM-RS transmission timing dynamic by linking it to the delay value K2. Instead of a fixed symbol index, the transmission occurs at a symbol index determined by the specific delay value configured for the uplink communication, allowing the system to adapt to different timing requirements while maintaining clear determination rules
Solution Approach 2:
The patent changes the parameter used for DM-RS timing from a fixed value to a variable parameter (symbol index) that depends on the delay value K2. This parameter change enables the system to support multiple delay configurations (K2=0, K2=1, etc.) while providing guidance on how to determine the appropriate symbol index for each case
2Adaptability or versatility
If different delay values (K2) are supported for uplink communications, then the system achieves better adaptability for diverse usage scenarios, but the determination of time division location for reference signals becomes more complex
Solution Approach 1:
The patent applies preliminary action by providing advance guidance on how to determine the symbol index for DM-RS transmission based on the delay value K2. The method establishes predetermined rules that enable the UE to calculate the appropriate timing location before transmission, simplifying the detection and measurement process despite supporting multiple delay values
Solution Approach 2:
The patent introduces the delay value K2 as an intermediary parameter that mediates between the uplink grant reception and the DM-RS transmission timing. This intermediary enables the system to handle diverse usage scenarios by using K2 to index into or calculate the appropriate symbol position, making the relationship between different delay values and timing locations manageable
3Measurement precision
If flexible timing adjustments are made for reference signal transmission based on delay values, then synchronization accuracy is improved, but the system requires more complex timing determination mechanisms
Solution Approach 1:
The patent implements dynamic timing adjustment where the DM-RS symbol index is determined by the delay value K2. This dynamic approach improves synchronization accuracy by allowing precise timing adjustments matched to the actual transmission delay, while the determination mechanism remains manageable through established rules that map K2 values to specific symbol positions
Data Source
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AI summary
Aspects herein describe transmitting a reference signal in wireless communications. A configured delay value related to a delay in communications can be determined based on receiving a corresponding resource grant. A time division of a slot for transmitting a reference signal for the communications can be determined based at least in part on the configured delay value. The reference signal can be transmitted during the time division of the slot.