UE Transmit Power Control Across Network Power Mode Changes
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Solution Overview
Problem
In wireless communication systems, when network nodes transition between power modes, user equipment (UE) may continue to use the same transmit power indicated by transmit power control (TPC) commands, leading to synchronization issues, dropped communications, or excess interference.
Innovation Solution
UEs determine transmit power based on TPC commands and network power modes, switching between interpreting commands as absolute or accumulative based on the current mode, aligning power levels with network capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the network node changes power modes (between reduced power mode and non-reduced power mode), then energy consumption is reduced, but the UE may continue to use the same transmit power indicated in TPC commands, resulting in synchronization issues and dropped communications
Solution Approach 1:
The patent implements dynamic interpretation of TPC commands by the UE, where the interpretation mode (absolute vs. accumulative) changes based on the current network power mode. This dynamic adaptation ensures that UE transmit power remains synchronized with network power mode transitions, preventing communication failures while allowing energy-saving operations.
Solution Approach 2:
The patent changes the interpretation parameter of TPC commands based on network power mode. When the network transitions to reduced power mode, the UE interprets TPC commands as absolute values rather than accumulative adjustments, ensuring transmit power aligns with reduced network capabilities and avoiding synchronization issues.
2Device complexity
If the UE uses the same transmit power interpretation method regardless of network power mode, then device complexity is reduced, but excess interference occurs when network power modes change
Solution Approach 1:
The patent modifies the TPC command interpretation parameter based on network power mode indicators. The UE switches between absolute and accumulative interpretation modes according to the current power mode, dynamically adjusting the parameter to prevent excess interference while maintaining relatively simple device architecture.
3Adaptability or versatility
If the UE switches between interpreting TPC commands as absolute or accumulative based on network power mode, then transmit power alignment with network capabilities is improved, but device complexity increases
Solution Approach 1:
The patent implements parameter-based adaptation where the UE changes its TPC command interpretation mode based on network power mode indicators. This approach provides high adaptability to different power modes while keeping the implementation relatively simple by using parameter switching rather than complex decision logic.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive downlink control information conveying at least one transmit power control (TPC) command. The UE may transmit a communication using a transmit power based at least in part on the at least one TPC command and a power mode. Numerous other aspects are described.