Inter-eNB Carrier Aggregation Power Scaling
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Solution Overview
Problem
Current mobile communication systems, particularly the LTE-A, face challenges with carrier aggregation due to limited applicability and potential failures when multiple pico cells and macro cells coexist, leading to issues with inter-eNB carrier aggregation and uplink transmission power management.
Innovation Solution
A method and apparatus for facilitating inter-evolved Node B (eNB) carrier aggregation, involving differential power scaling and priority determination for uplink transmissions across multiple cell groups to manage transmit power effectively and prevent quality degradation, especially in scenarios with macro and pico cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inter-eNB carrier aggregation is implemented to enhance data rate, then the data rate is improved, but transmit power shortage and quality degradation occur
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the power scaling factor (w) based on transmission conditions. The power scaling factor is modified according to the difference between required transmit power and maximum allowed transmit power, allowing the system to adapt power allocation parameters to resolve the contradiction between maintaining high data rates and preventing power shortage-induced quality degradation
Solution Approach 2:
The patent implements dynamics by making the power scaling factor adjustable and configurable rather than fixed. The network can dynamically configure different power scaling factors for different cell groups based on current transmission conditions, enabling the system to flexibly respond to changing power availability and transmission requirements to maintain both high data rates and transmission quality
2Area of stationary object
If multiple pico cells and macro cells coexist to expand coverage, then coverage area is improved, but carrier aggregation failure increases
Solution Approach 1:
The patent applies local quality by configuring different power scaling factors for different cell groups (macro cell group vs. pico cell group) based on their specific characteristics and transmission conditions. Each cell group can have optimized power allocation parameters tailored to its local requirements, improving carrier aggregation reliability in heterogeneous networks with mixed macro and pico cells
Solution Approach 2:
The patent uses parameter changes by allowing the network to configure specific power scaling factors for different cell groups based on their properties. This enables customized power management for macro cells versus pico cells, resolving the carrier aggregation failure issue in multi-cell scenarios by adapting parameters to local network conditions
3Device complexity
If equal power scaling is applied to all cell groups, then power allocation is simplified, but transmission quality degrades due to power shortage
Solution Approach 1:
The patent resolves this contradiction by applying different power scaling factors to different cell groups based on their specific transmission conditions and requirements. Instead of uniform power scaling, each cell group receives customized power allocation parameters, maintaining transmission quality while the network manages the complexity through centralized configuration
Solution Approach 2:
The patent implements dynamics by making power scaling factors configurable and adjustable rather than fixed at equal values. The network can dynamically set appropriate power scaling factors for different cell groups based on current conditions, allowing the system to adapt to changing requirements and maintain transmission quality without being constrained by fixed equal power scaling
Data Source
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AI summary
A multicarrier-based data transmission method and an apparatus for use in a mobile communication system are provided. A Radio Network Temporary Identity (RNTI) reception method of a terminal in a wireless communication system supporting inter-evolved Node B (eNB) carrier aggregation includes receiving cell information on at least one activated cell under control of an eNB, configuring first and second RNTIs allocated by the eNB, monitoring the at least one activated cell for the first RNTI, and monitoring a primary cell among the at least one activated cell for the second RNTI.