Cellular Network Interference Canceling Signaling Method
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Solution Overview
Problem
Current LTE mobile cellular networks face limitations in data rate capacity due to intercellular and MU-MIMO interference, which existing techniques struggle to optimize effectively, leading to suboptimal use of radio spectrum and potential loss in sum-rate performance.
Innovation Solution
A signaling method that allows terminals to return indicators of maximum reception rates with and without interference canceling, enabling the network to determine whether to activate interference canceling and allocate data rates accordingly, thereby maximizing data rate performance while avoiding sum-rate reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference canceling is activated to improve data rate performance, then individual user data rate is improved, but network sum-rate may be reduced due to suboptimal resource allocation
Solution Approach 1:
The patent implements a feedback mechanism where terminals report their reception capabilities and interference levels to the network. The network uses this feedback to dynamically adjust resource allocation and interference canceling activation decisions, optimizing both individual user performance and overall network sum-rate through iterative improvement based on actual system state
Solution Approach 2:
The system dynamically adjusts interference canceling activation and resource allocation based on real-time channel conditions, terminal capabilities, and network load. The network can switch between different interference management strategies (activate/cancel interference canceling, allocate resources differently) depending on current system state, making the solution adaptive rather than static
2Ease of operation
If conventional interference management techniques are used, then implementation simplicity is maintained, but radio spectrum utilization is suboptimal
Solution Approach 1:
The patent introduces an intermediary signaling mechanism between terminals and the network that enables sophisticated interference management without requiring complex terminal-side processing. The terminal reports capability indicators and reception rate information, and the network uses this information to make optimized resource allocation decisions, effectively mediating between simple terminal implementation and complex network-side optimization
3Reliability
If interference canceling is always activated, then terminal reception performance is improved, but network capacity and sum-rate are reduced
Solution Approach 1:
Instead of always activating interference canceling, the patent applies partial action by selectively activating interference canceling only for specific terminals under specific conditions where it provides net benefit. The network evaluates terminal reports and activates interference canceling only when the terminal's reception performance improvement outweighs the network capacity cost, avoiding excessive application of the technique
Data Source
AI summary
A method is implemented by a cellular telecommunications network. The method includes: returning indicators from first and second terminals to the network, including, for the respective terminal, an indicator of a maximum reception rate without interference canceling in the presence of an interfering signal, and, for the first terminal, both an indicator of the maximum reception rate with interference canceling in the presence of the interfering signal, and an indicator of the maximum reception rate of the interfering signal; the network determining whether to activate interference canceling by the first terminal and determining respective data rates to be allocated to the first and second terminals as a function of the returned indicators; the network notifying the first terminal whether to activate interference canceling and modifying the first and second terminals of the allocated data rates; the network signaling to the first terminal the data rate allocated to the second terminal.