Dynamic DM RS Configuration for Uplink Spectral Efficiency
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in uplink spectral efficiency due to high overhead from uplink demodulation reference signals (DM RS), particularly in small cell scenarios, which can limit data throughput and multi-user MIMO operations.
Innovation Solution
The method involves dynamically configuring DM RS transmission by supporting options such as transmitting in both slots, only one slot, or not transmitting at all, and using aperiodic SRS for channel demodulation, allowing flexible symbol allocation and reducing DM RS overhead, while ensuring reliable channel estimation and MU-MIMO operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink demodulation reference signals (DM RS) are transmitted in both slots of a subframe, then channel estimation reliability is improved, but uplink spectral efficiency deteriorates due to high overhead
Solution Approach 1:
The patent implements dynamic DM RS transmission by introducing a transmission indicator that allows the system to adaptively select between different transmission modes (both slots, one slot, or no transmission) based on current channel conditions and traffic requirements, resolving the contradiction between maintaining reliability and improving spectral efficiency
Solution Approach 2:
The patent changes the transmission parameters of DM RS by allowing dynamic adjustment of transmission frequency and resources through the indication mechanism, enabling the system to optimize the balance between channel estimation quality and resource overhead根据不同场景需求
2Adaptability or versatility
If aperiodic Sounding Reference Signals (SRS) are used for channel demodulation, then flexibility in resource allocation is improved, but system complexity increases
Solution Approach 1:
The patent makes the uplink grant message serve multiple functions by incorporating it as the indication mechanism for DM RS transmission, allowing the existing control channel to simultaneously perform resource allocation and transmission configuration, thereby reducing overall system complexity while maintaining flexibility
Solution Approach 2:
The system uses its own existing control structures (uplink grant messages and transmission indicators) to manage DM RS transmission rather than introducing separate dedicated control channels, allowing the system to self-configure reference signal transmission using already-available resources
Data Source
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AI summary
A method is provided. Amount information is determined. The amount information relates to an amount of reference information a user equipment is to provide. The amount information is caused to be provided to the user equipment. Reference information from the user equipment is used to process data from said user equipment.