Relay Selection Using Latency Indicators for QoS Profiles
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Solution Overview
Problem
Current relay user equipment selection methods in communication systems primarily rely on channel quality between remote and relay devices, neglecting the latency and quality of service profiles required for effective data transmission, which can lead to suboptimal performance due to unknown or unconsidered upstream link setup times.
Innovation Solution
An apparatus and method that determine and output latency indicators associated with setting up links for various quality of service profiles, allowing remote devices to select relay equipment based on both channel quality and setup latency, thereby improving data transmission efficiency by considering the latency and quality of service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If relay user equipment selection is based only on channel quality between remote and relay devices, then the selection process is simple, but the data transmission latency increases and quality of service deteriorates due to unknown upstream link setup times
Solution Approach 1:
The patent applies preliminary action by having relay user equipment proactively determine and broadcast latency indicators for setting up upstream links with destination devices before actual data transmission occurs. This allows remote user equipment to select relays based on pre-known latency information, avoiding the need to discover setup delays during actual communication, thus reducing overall transmission latency while maintaining manageable selection complexity
Solution Approach 2:
The patent introduces latency indicators as an intermediary information element that mediates between the relay selection process and the actual data transmission. These indicators provide remote user equipment with quantitative information about upstream link setup times without requiring complex real-time measurements or trials, enabling informed relay selection that balances simplicity with performance optimization
2Reliability
If relay user equipment selection considers multiple quality of service profiles and latency indicators, then data transmission quality improves, but the information processing and selection complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing latency indicators as new selection parameters that complement existing channel quality metrics. Rather than fundamentally changing the selection mechanism, the patent adds specific measurable parameters (latency indicators for different QoS profiles) that enable more informed decisions. This approach improves transmission quality by considering both channel conditions and setup delays, while maintaining the overall selection framework structure to limit complexity increase
Solution Approach 2:
The patent segments the relay selection criteria into distinct components: channel quality metrics and latency indicators for different quality of service profiles. This segmentation allows remote user equipment to evaluate relays based on multiple independent factors and select the optimal relay for specific transmission requirements. By dividing the selection process into manageable evaluation dimensions, the patent improves decision quality while keeping the complexity of each individual evaluation step relatively simple
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
Selecting a relay user equipment at a remote user equipment to communicate with a destination that may be the network or a further user equipment. The remote user equipment may select the relay user equipment based on the quality of the channel link between them and the setup latency of any link required between the relay user equipment and the destination. This latter may be determined from a signal output by potential relay user equipment the signal indicating different latencies associated with setting up links for different quality of service profiles.