Inter-eNB Carrier Aggregation via RNTI Segmentation
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Solution Overview
Problem
Current mobile communication systems, particularly LTE-A, face limitations in carrier aggregation due to the restriction to intra-eNB scenarios, leading to potential carrier aggregation failures when multiple pico cells and macro cells coexist, necessitating a method for inter-eNB carrier aggregation to enhance data rate and transmission quality.
Innovation Solution
A method and apparatus for inter-evolved Node B (eNB) carrier aggregation, involving Radio Network Temporary Identity (RNTI) reception and configuration, differential power scaling, and priority determination to manage uplink transmit power effectively across multiple cell groups, ensuring optimal transmission quality by prioritizing cell groups and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If intra-eNB carrier aggregation is used, then device complexity is reduced, but adaptability deteriorates due to inability to support inter-eNB scenarios
Solution Approach 1:
The patent segments the carrier aggregation functionality by introducing separate RNTI monitoring mechanisms for different cell groups. The terminal device is configured with first RNTI for monitoring control channels in a first cell group and second RNTI for monitoring control channels in a second cell group, allowing independent management of different eNB groups while maintaining overall system coherence.
Solution Approach 2:
The patent implements dynamic RNTI configuration where the terminal device can be dynamically assigned different RNTIs based on the cell group it is currently accessing. This dynamic assignment allows the system to adapt to changing network conditions and cell group configurations without requiring fixed, complex pre-configuration for all possible scenarios.
2Reliability
If multiple RNTIs are configured for inter-eNB carrier aggregation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the RNTI management into separate segments: first RNTI for the first cell group and second RNTI for the second cell group. This segmentation allows each RNTI to be independently configured and monitored, reducing the complexity of managing multiple RNTIs simultaneously while ensuring reliable communication across different eNB groups.
Solution Approach 2:
The patent introduces the concept of cell group as an intermediary layer between the terminal device and multiple eNBs. The cell group structure provides a logical organization that simplifies RNTI management by grouping cells under common RNTI identifiers, reducing the complexity of direct multi-eNB coordination.
3Reliability
If differential power scaling is applied, then uplink transmission quality is improved, but device complexity increases
Solution Approach 1:
The patent applies differential power scaling by prioritizing certain cell groups over others based on local conditions. The terminal device is configured to prioritize uplink transmission to a first cell group over a second cell group when power resources are constrained, allowing optimized power distribution tailored to specific transmission requirements and channel conditions.
Solution Approach 2:
The power control mechanism is made dynamic through priority-based differential scaling. The terminal device can dynamically adjust transmission power allocation between different cell groups based on current network conditions, buffer status, and channel quality, rather than using fixed power distribution rules.
Data Source
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.