WLAN Rate Adaptation for LTE Coexistence Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The coexistence of WLAN and LTE communication technologies in devices leads to interference due to overlapping frequency bands, affecting the resilience of data rates in WLAN communications.
Innovation Solution
The first communication module, compatible with WLAN, refrains from advertising data rates that are not resilient to interference from the second communication module, such as LTE, by setting a fixed or dynamic rate threshold based on predicted signal-to-interference-plus-noise ratio (SINR), thereby limiting advertised data rates to those that can maintain a predetermined quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the first communication module advertises support for high data rates, then the productivity of WLAN communication is improved, but the reliability of data transmission deteriorates due to interference from the second communication module
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the advertised data rates based on the predicted SINR. The first communication module calculates a predicted SINR that accounts for interference from the second communication module, then selects and advertises only those data rates that are resilient to the predicted interference level. This resolves the contradiction by changing the parameter of advertised data rates from a fixed high value to a dynamically adjusted value that maintains reliability while preserving as much productivity as possible.
Solution Approach 2:
The patent applies preliminary action by calculating the predicted SINR and determining resilient data rates before actually advertising them to client devices. The first communication module performs this calculation in advance, taking into account the predicted interference from the second communication module, so that when data transmission occurs, the appropriate data rates are already selected and advertised. This prevents reliability issues rather than reacting to them after they occur.
2Adaptability or versatility
If the first communication module advertises all permitted data rates, then the adaptability of the wireless network is improved, but the object-affected harmful factors increase due to interference vulnerability
Solution Approach 1:
The patent changes the parameter of advertised data rates from a static comprehensive set to a dynamically filtered set based on predicted SINR. By calculating which data rates are resilient to predicted interference from the second communication module, the system adapts the advertised rates parameter to match current interference conditions. This maintains adaptability within safe bounds while reducing vulnerability to interference.
Solution Approach 2:
The patent converts the harmful interference from the second communication module into a beneficial filtering mechanism. By calculating the predicted SINR that includes this interference, the system uses the harmful interference as a basis for selecting only those data rates that are proven to be resilient. The interference itself becomes the criterion for selection, transforming a harmful factor into a useful parameter for determining appropriate data rates.
3Measurement precision
If the first communication module calculates predicted SINR for each data rate, then the measurement precision of interference assessment is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by calculating the predicted SINR specifically for the first communication module's reception, taking into account the local interference characteristics from the second communication module. Rather than performing complex calculations for every possible scenario, the system focuses the precision calculation on the specific local condition of predicted interference from the co-located second radio, achieving high measurement precision where it is most needed without unnecessary complexity elsewhere.
Data Source
Figure 1
Figure 2-1~2-2
Figure 3~4
AI summary
An apparatus (100) has a first communication module (101) and a second communication module (111). The first communication module is compatible with a first wireless communication technology, and the second communication module is compatible with a second wireless communication technology that differs from the first wireless communication technology. Transmissions by the second communication module may contribute to interference at the first communication module. The first communication module refrains from advertising support for any data rate that is not expected to be sufficiently resilient in the face of interference caused by transmissions from the second communication module.