Dynamic Bandwidth Configuration for Multi-User Reference Signals
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in optimizing data transmissions between base stations and multiple user equipment (UEs) due to the dependency on channel quality estimates, which can lead to suboptimal resource allocation and increased interference, especially when multiple users request data simultaneously.
Innovation Solution
The method involves determining a respective bandwidth for each UE's reference signal based on channel quality between the UE and the base station, allowing for optimized resource allocation through selection between spatial multiplexing (SDM) and frequency division multiplexing (FDM), thereby improving throughput and reducing processing power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station uses a fixed bandwidth for reference signals from all UEs, then the configuration is simple, but the resource allocation efficiency is suboptimal when multiple users request data simultaneously
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the bandwidth of reference signals based on channel quality conditions. The base station determines different bandwidths for different UEs according to their respective channel qualities, transforming the fixed bandwidth parameter into a variable one that adapts to actual transmission needs, thereby improving resource allocation efficiency without excessive complexity
Solution Approach 2:
The invention implements dynamics by making the reference signal bandwidth configurable and adaptable rather than static. The base station can dynamically assign different bandwidths to different UEs based on real-time channel quality assessments, allowing the system to respond flexibly to varying traffic conditions and user requirements
2Measurement precision
If the base station increases the bandwidth for reference signals to improve channel quality estimation, then the estimation accuracy improves, but the interference increases and processing power consumption increases
Solution Approach 1:
The patent applies local quality by assigning different bandwidths to different UEs based on their specific channel quality conditions. Instead of using a uniform high bandwidth for all UEs, the base station tailors the reference signal bandwidth to each UE's local channel characteristics, ensuring sufficient estimation accuracy for each user while minimizing overall interference and processing requirements
Solution Approach 2:
The invention implements partial action by allocating bandwidth resources proportionally to actual needs. The base station determines appropriate bandwidths for reference signals based on channel quality requirements, avoiding excessive bandwidth allocation that would generate unnecessary interference and processing overhead while still achieving sufficient estimation accuracy
3Productivity
If the base station serves multiple users simultaneously using spatial multiplexing, then the throughput increases, but the channel quality estimation becomes more difficult and interference increases
Solution Approach 1:
The patent applies segmentation by dividing the bandwidth resource into different segments for different UEs based on their channel qualities. When serving multiple users simultaneously, the base station assigns specific bandwidth portions to each UE for reference signal transmission, which helps separate the channel estimation processes and reduces mutual interference, thereby maintaining estimation reliability while enabling spatial multiplexing
Solution Approach 2:
The invention uses parameter changes by adjusting reference signal bandwidths dynamically when multiple users are served simultaneously. The base station modifies the bandwidth parameters of reference signals according to channel quality conditions and multiplexing requirements, enabling reliable channel estimation even in multi-user spatial multiplexing scenarios
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances resource allocation efficiency, reduces interference, and increases data transmission rates by ensuring that each UE transmits reference signals within usable bandwidths, thereby improving overall network performance and battery life.
Implementation Method 1
In time division duplex (TDD) systems, the uplink and downlink may share the same bandwidth, which allows the base station to obtain channel state information through utilizing reciprocity in the wireless channel. That is, for example, channel state information for the uplink channel may be used for the downlink channel.
Data Source
AI summary
Methods and apparatus are provided for configuring a plurality of User Equipments (UEs) to communicate with a base station. In one example, a method includes determining, for each UE, a respective bandwidth based on an indication of channel quality between the UE and the base station, and configuring at least a subset of the plurality of UEs to communicate with the base station based on the respective bandwidths.