Flexible SRS Transmission Configuration for Wireless Networks
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Solution Overview
Problem
Current SRS transmission configurations in wireless communication networks are inefficient, particularly in scenarios where terminal devices fail to transmit SRS due to contention-based protocols like LBT, leading to prolonged delays and resource wastage, as they rely on singular transmission configurations that do not account for multiple opportunities within a time unit or frequency domain.
Innovation Solution
Implementing a method and system that allows for flexible SRS transmission by providing terminal devices with multiple alternative SRS transmission selections, enabling them to transmit SRS using different symbols or subcarriers within a time unit or frequency domain based on successful contention-based protocol outcomes, thereby reducing delays and resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a singular SRS transmission configuration is used, then the configuration is simple and easy to manage, but the transmission efficiency deteriorates when contention-based protocols fail
Solution Approach 1:
The patent applies dynamics by making the SRS transmission configuration flexible and adaptive rather than fixed. The network device configures multiple alternative SRS transmission selections (different symbols, subcarriers, or resource blocks), and the terminal device dynamically selects among these alternatives based on LBT outcomes. This dynamic selection mechanism resolves the contradiction by maintaining configuration simplicity at the network side while enabling efficient adaptive transmission at the terminal side.
Solution Approach 2:
The patent changes the parameter of SRS transmission configuration from a single fixed value to multiple alternative values (different time symbols, frequency subcarriers, or resource blocks). The terminal device selects among these parameter alternatives based on channel access success, thereby improving transmission efficiency without significantly increasing network device complexity.
2Productivity
If multiple alternative SRS transmission selections are provided, then the transmission efficiency improves by providing retry opportunities, but the configuration complexity increases
Solution Approach 1:
The patent segments the SRS transmission configuration into multiple alternative selections (different symbols, subcarriers, or resource blocks) within a single configuration message. The network device provides all alternatives in one go, and the terminal device segments the decision-making process by selecting based on LBT outcomes. This segmentation approach improves efficiency while keeping network device complexity manageable.
Solution Approach 2:
The terminal device performs self-service by autonomously selecting among the configured alternative SRS transmission selections based on its own LBT outcomes. This self-service mechanism eliminates the need for complex network-side coordination and real-time adjustments, thereby improving transmission efficiency while limiting the increase in configuration complexity to the terminal device only.
3Reliability
If SRS transmission is contingent on LBT success, then channel access fairness is improved, but transmission delays increase when LBT fails
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple alternative SRS transmission selections (different symbols, subcarriers, or resource blocks) before the terminal device attempts channel access. When LBT succeeds, the terminal device can immediately transmit SRS on the selected alternative without additional configuration delays, thereby reducing transmission delay while maintaining channel access fairness through the contention-based protocol.
Solution Approach 2:
The patent introduces another dimension by providing alternatives across different time symbols, frequency subcarriers, or resource blocks. When LBT fails for one alternative, the terminal device can retry on another alternative within the same time unit, effectively adding temporal or frequency diversity dimensions. This reduces transmission delays caused by LBT failures while preserving channel access fairness.
Data Source
AI summary
Embodiments of the invention include methods of providing flexible sounding reference signal (SRS) transmission in a wireless communication network. In one embodiment, a method is implemented in a network device for configuring sounding reference signal (SRS) transmission from a terminal device to the network device, the method comprises: transmitting, by a network device to a terminal device, an indication of a plurality of alternative SRS transmission selections; and detecting, by the network device from a signal of the terminal device, a SRS transmission based on the plurality of alternative SRS transmission selections.