Dynamic SRS Triggering for Flexible Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The semi-static configuration of SRS transmission in LTE networks is inflexible, leading to inefficient resource allocation, as resources are reserved for all users regardless of need, and cannot be prioritized based on current channel conditions or traffic burstiness.
Innovation Solution
Dynamic triggering of SRS transmission in any uplink subframe, allowing mobile terminals to use predefined symbols for data or SRS based on instructions from the base station, enabling flexible resource allocation and prioritization according to user needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static configuration of SRS transmission is used, then resource allocation is simplified and system complexity is reduced, but resource allocation efficiency deteriorates because resources are reserved for all users regardless of actual need
Solution Approach 1:
The patent applies dynamics by transitioning from semi-static SRS configuration to dynamic triggering mechanisms. The base station can now dynamically trigger SRS transmission in any uplink subframe based on current channel conditions and traffic requirements, allowing the system to adapt resource allocation in real-time rather than following rigid pre-configured patterns.
Solution Approach 2:
The invention changes the configuration parameter state from fixed semi-static values to dynamically adjustable parameters. The base station can modify SRS transmission parameters including timing, frequency resources, and bandwidth dynamically based on network conditions, enabling optimal resource utilization without requiring complex reconfiguration procedures.
2Ease of operation
If semi-static SRS configuration is used, then system operation is simpler and easier to manage, but adaptability to different channel conditions and user needs deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the base station monitors uplink channel conditions and user traffic patterns, then uses this feedback information to dynamically trigger SRS transmissions. This closed-loop approach maintains operational simplicity at the base station while achieving high adaptability to changing channel conditions and user requirements.
Solution Approach 2:
The system enables self-service by allowing the base station to autonomously determine when and how SRS transmissions should occur based on real-time network conditions. The base station automatically adjusts SRS configuration without requiring manual intervention or complex coordination between network elements, maintaining ease of operation while achieving adaptability.
3Reliability
If resources are reserved for all users for SRS transmission, then fairness in resource allocation is improved, but resource utilization efficiency deteriorates due to unnecessary reservations
Solution Approach 1:
The patent applies local quality by providing differentiated SRS resource allocation to different users based on their specific needs and channel conditions. Instead of uniform resource reservation for all users, the base station dynamically allocates SRS resources locally to individual users who require them, eliminating waste while maintaining fairness through need-based allocation.
Solution Approach 2:
The invention uses partial action by triggering SRS transmissions only for users and in subframes where they are actually needed, rather than requiring all users to transmit SRS in all configured subframes. This selective approach reduces unnecessary resource reservations while ensuring adequate SRS opportunities for users with varying channel conditions and traffic patterns.
Data Source
AI summary
A base station in a communications network broadcasts a cell-specific instruction to a plurality of mobile terminals in a cell served by the base station. The cell-specific instruction indicates that an uplink symbol in each of multiple subsequent subframes has been semi-statically configured for sounding reference signal (SRS) transmission. The base station determines that a first mobile terminal of the plurality of mobile terminals is to use the uplink symbol in a given one of the multiple subsequent subframes for aperiodic SRS transmission, and in response, signals a terminal-specific instruction to the first mobile terminal. The terminal-specific instruction is distinct from the cell-specific instruction and indicates that the first mobile terminal is to use the uplink symbol in the given subframe for aperiodic SRS transmission and not for data transmission.