Uplink Antenna Group Switching Under SAR Transmission Gaps
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Solution Overview
Problem
Uplink transmissions to non-terrestrial network nodes may exceed specific absorption rate (SAR) compliance thresholds, leading to delayed or failed communications, increased data transfer latencies, and connection failures due to the need to cease transmission to mitigate SAR violations.
Innovation Solution
A UE employs multiple antenna groups to transmit portions of an uplink transmission in separate durations with gaps, ensuring each portion's power levels do not exceed configured thresholds, allowing joint reception at the network node without exceeding SAR limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits uplink transmission at increased power level to non-terrestrial network node, then the probability of successful reception and decoding is improved, but the SAR compliance threshold is exceeded
Solution Approach 1:
The patent segments the uplink transmission into multiple portions that are transmitted using different antenna groups in separate time durations. By dividing the transmission into segments with transmission gaps between them, the UE can maintain higher power levels for reliable communication while ensuring that no single continuous transmission exceeds SAR compliance thresholds.
2Object-affected harmful factors
If the UE ceases transmission to satisfy SAR operating condition, then SAR compliance is maintained, but communication is delayed or failed
Solution Approach 1:
The patent implements periodic action by introducing transmission gaps between different portions of the uplink transmission. The UE transmits portions periodically using different antenna groups, allowing SAR compliance to be maintained during each segment while ensuring continuous progress toward complete transmission. This periodic structure enables the UE to resume transmission after gaps without violating SAR limits.
3Object-affected harmful factors
If the UE uses multiple antenna groups with transmission gaps, then SAR compliance is maintained, but transmission time is increased
Solution Approach 1:
The patent segments the uplink transmission into multiple portions transmitted at different times using different antenna groups. This segmentation inherently introduces time loss due to transmission gaps, but it enables SAR compliance. The segmentation allows the UE to transmit at higher power levels during each segment, potentially reducing overall transmission time compared to continuous low-power transmission.
4Productivity
If the UE transmits continuously without gaps, then data throughput is maximized, but SAR compliance is violated
Solution Approach 1:
The patent segments continuous transmission into discrete portions separated by gaps. Each portion can be transmitted at optimized power levels for maximum throughput, while the gaps ensure SAR compliance. This segmentation allows the UE to achieve high data throughput during active transmission periods while maintaining SAR compliance through strategic pauses.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, using a first antenna group, a first portion of an uplink transmission in a first duration of a time allocation for the uplink transmission. The UE may transmit, using a second antenna group, a second portion of the uplink transmission in a second duration of the time allocation, the first duration and the second duration separated in the time allocation by a transmission gap. Numerous other aspects are described.