CoMP Joint Transmission Anchor Cell Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, inter-cell interference limits throughput, particularly for cell-edge users, as reducing transmission power at interfering base stations can worsen performance for these users.
Innovation Solution
A subscriber station and base station configuration that listens for downlink control information only from an anchor cell, selects and communicates an active set of cells, and uses dedicated antenna ports with cell-specific frequency shifts for coordinated multipoint (CoMP) joint transmission, minimizing interference while maintaining signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power at interfering base station is reduced, then interference to subscriber station is reduced, but received power for cell-edge user is worsened
Solution Approach 1:
The patent combines transmissions from multiple base stations (anchor cell and cooperating cells) to jointly serve cell-edge users. By merging the transmitted signals through coordinated multipoint transmission, the system achieves signal combining at the subscriber station, improving received power while managing interference through coordination rather than simple power reduction.
Solution Approach 2:
The patent introduces channel state information feedback as an intermediary mechanism between subscriber stations and base stations. This feedback enables the network to adaptively adjust transmission parameters based on actual channel conditions, allowing optimal power allocation that improves received power for cell-edge users while controlling interference to others.
2Power
If CoMP joint transmission is implemented, then received power for cell-edge users is improved, but device complexity increases
Solution Approach 1:
The patent segments the CoMP system into distinct functional components: anchor cells that provide control information, cooperating cells that provide additional transmission, and subscriber stations that provide feedback. This segmentation allows each component to perform specialized functions, managing overall system complexity while achieving improved received power through coordinated operation.
Solution Approach 2:
The patent utilizes parameter changes in channel state information feedback to dynamically adjust transmission parameters. By monitoring and reporting channel conditions, the system adapts transmission power, precoding, and resource allocation parameters to optimize received power for cell-edge users without requiring permanent complex configurations.
Data Source
AI summary
A subscriber station is provided. The subscriber station comprises a receiver configured to listen for downlink control information for coordinated multipoint (CoMP) joint transmission only from an anchor cell, and to receive the downlink control information for CoMP joint transmission from the anchor cell.