Network Assisted Interference Cancellation via Common Control Channel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Network-assisted interference cancellation in heterogeneous wireless communication systems faces challenges such as latency, high processing resource consumption, and coordination requirements due to the need for user equipment to decode multiple control channels and synchronize with interfering cells.
Innovation Solution
The interfering cell broadcasts control information over a common control channel, allowing user equipment to mitigate interference by decoding and subtracting interfering data channels, reducing the need for decoding dedicated control channels and improving timing alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment decodes dedicated control channels from interfering cells to cancel interference, then interference cancellation effectiveness is improved, but processing resource consumption and latency increase
Solution Approach 1:
The patent extracts only the essential control information needed for interference cancellation from the full dedicated control channels. Instead of decoding complete control channels, the system extracts specific parameters such as modulation scheme, coding rate, and resource allocation information, thereby reducing processing time and resource consumption while maintaining cancellation effectiveness.
Solution Approach 2:
The interfering cell pre-broadcasts control information about its data channels before the actual data transmission. This preliminary action includes transmitting modulation and coding information in advance, allowing the victim cell's user equipment to prepare interference cancellation parameters beforehand, thus reducing latency during actual data reception.
2Reliability
If user equipment decodes dedicated control channels from interfering cells to cancel interference, then interference cancellation effectiveness is improved, but processing resource consumption increases
Solution Approach 1:
The system extracts only the critical control parameters from interfering cell transmissions that are necessary for interference cancellation. By selecting and processing only essential information elements rather than complete control channels, the user equipment significantly reduces computational burden, memory usage, and energy consumption while preserving the ability to effectively cancel interference.
Solution Approach 2:
The patent implements partial decoding by processing only a subset of control channel information that is most critical for interference cancellation. This partial action approach processes sufficient information to achieve cancellation effectiveness without the excessive resource consumption of complete control channel decoding.
3Ease of operation
If interfering cell broadcasts control information over common control channel, then coordination requirements are reduced, but information overhead increases
Solution Approach 1:
The patent reuses the existing common control channel infrastructure for multiple purposes: it continues to serve its original function of broadcasting common control information while simultaneously carrying interference cancellation assistance information. This multi-functionality approach eliminates the need for separate dedicated coordination channels, reducing inter-cell coordination complexity while managing overhead through efficient multiplexing.
Data Source
AI summary
The present application describes embodiments of methods for network assisted interference cancellation. Some embodiments of the method include broadcasting control information from a first cell over a common control channel. The control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment.