Uplink Power Allocation in Multiflow UE Networks
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Solution Overview
Problem
In wireless communication networks, especially in multiflow-enabled networks, there is a challenge in efficiently managing uplink control and data transmission due to interference and power limitations, which affects the performance of user equipment (UE) in communicating with multiple cells or nodes.
Innovation Solution
The implementation of methods and apparatus at the UE to prioritize power allocation across uplink control and shared channel transmissions, generate and prioritize sounding reference signals, and report power headroom to manage transmission power effectively across multiple cells, enabling efficient multiflow uplink communication regardless of timing adjustment groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits uplink control and data signals to multiple cells simultaneously in multiflow mode, then the network capacity and user throughput are improved, but the transmission power management becomes complex and power allocation conflicts arise
Solution Approach 1:
The patent segments the power management task by separating uplink control signals (PUCCH) from uplink data signals (PUSCH) and assigning different power allocation rules to each. Control signals receive prioritized power allocation to ensure reliable communication, while data signals receive remaining power resources. This segmentation resolves the complexity of managing power across multiple cells by handling different signal types independently with dedicated power management strategies.
2Reliability
If the UE prioritizes power allocation for control signals over data signals, then the reliability of control communication is improved, but the data transmission efficiency may be reduced
Solution Approach 1:
The patent implements power headroom reporting mechanisms where the UE provides feedback to the base station about its remaining power capacity. This feedback enables dynamic power allocation adjustments where the base station can optimize data transmission power based on actual power headroom conditions. The feedback mechanism ensures that control signals maintain minimum reliability requirements while allowing data transmission to efficiently utilize available power resources.
3Adaptability or versatility
If the UE transmits signals to multiple non-co-located nodes with different timing adjustment groups, then the network coverage and flexibility are improved, but the timing coordination and signal collision management become more difficult
Solution Approach 1:
The patent segments timing management by creating separate timing advance groups (TAGs) for different cell groups. Each TAG has its own timing advance parameters, allowing independent timing control for different cells. This segmentation enables the UE to handle multiple non-co-located nodes with different timing characteristics without creating a single complex timing coordination problem, as each cell group can be synchronized independently.
Data Source
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AI summary
Signaling and procedural considerations are disclosed for uplink multiflow operations in user equipment configured for carrier aggregation. Advanced wireless networks may take advantage of unused capacity of neighboring cells by configuring network nodes and UEs to both receive on the downlink and transmit on the uplink to multiple cells or network nodes. Implementing multiflow on UE for the uplink transmission process may cause issues in various channels, signaling, and procedural operations that may be addressed through data and control signaling the techniques disclosed herein.