Cell-Specific Sounding Reference Signal Sub-Frame Configuration
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Solution Overview
Problem
In wireless communication networks, existing technologies face challenges in efficiently allocating sounding resources to user equipment (UE) with varying velocities, as a common sounding period cannot be shared between UEs with different velocities, leading to inefficient utilization of resources and potential stale channel quality indicators (CQI) for fast-moving UEs.
Innovation Solution
The method involves broadcasting a sounding reference signal sub-frame configuration by base stations, allowing each user equipment to sound only at permitted sub-frames, with differing cells having unique configurations tailored to the velocity of UEs, using parameters like sub-frame period and offset to optimize sounding resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common sounding period is used for all UEs in a cell, then the configuration is simple, but sounding resources cannot be efficiently allocated to UEs with different velocities
Solution Approach 1:
The patent applies local quality by configuring different sounding periods for different cells based on the velocity characteristics of UEs in each cell. Each cell is assigned a sounding period tailored to its UE velocity distribution, allowing fast-moving UEs to have shorter periods while slow-moving UEs have longer periods, thus efficiently allocating sounding resources to match local UE characteristics.
2Measurement precision
If sounding period is reduced for fast UEs to maintain fresh CQI, then channel quality indication remains accurate, but sounding resources are consumed more frequently
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the sounding period parameter based on UE velocity. Fast-moving UEs are assigned shorter sounding periods to maintain fresh CQI, while slow-moving UEs are assigned longer periods, optimizing the balance between CQI freshness and resource consumption across the network.
3Productivity
If different sounding periods are configured for different cells, then sounding resources are efficiently allocated, but cross-cell interference may increase
Solution Approach 1:
The patent applies dynamics by making the sounding period configuration adaptive to UE velocity characteristics in each cell. The system dynamically adjusts sounding periods based on real-time or historical velocity data, allowing optimal resource allocation while managing interference through velocity-aware configuration.
Data Source
AI summary
A method of wireless communication including a plurality of fixed base stations and a plurality of mobile user equipment with each base station transmitting to any user equipment within a corresponding cell a sounding reference signal sub-frame configuration indicating sub-frames when sounding is permitted. Each user equipment recognizes the sounding reference signal sub-frame configuration and sounds only at permitted sub-frames. Differing cells may have differing sounding reference signal sub-frame configurations. There are numerous manners to encode the transmitted information.