LTE WLAN Coexistence Through Optimal Access Point Selection
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Solution Overview
Problem
Wireless communication devices face issues with simultaneous processing of WLAN and LTE signals due to frequency overlap, leading to signal blocking and intermodulation, which affects overall throughput.
Innovation Solution
A wireless communication device with a processing unit that includes a first chip for LTE and a second chip for WLAN, capable of determining and connecting to an optimal access point to minimize the impact of simultaneous LTE and WLAN signal processing on throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless communication device simultaneously processes WLAN and LTE signals, then the device can provide both short-range and long-range communication capabilities, but signal blocking and intermodulation occur due to frequency overlap, reducing overall throughput
Solution Approach 1:
The device segments the communication processing into separate chips: a first chip dedicated to LTE signal processing and a second chip dedicated to WLAN signal processing. This physical segmentation allows simultaneous operation of both communication standards while minimizing interference between them, as each chip handles its own frequency band independently.
Solution Approach 2:
The processing unit acts as an intermediary that coordinates between the first chip (LTE) and second chip (WLAN). It determines optimal access points for WLAN based on LTE signal conditions, and manages the simultaneous processing of both signal types to prevent blocking and intermodulation effects.
2Speed
If the device uses frequency bands that border or overlap the ISM band for LTE communication, then long-range communication coverage is extended, but WLAN signal reception is blocked and intermodulation occurs
Solution Approach 1:
The processing unit performs preliminary assessment of LTE signal transmission status before determining WLAN access point selection. By evaluating the LTE signal conditions in advance, the system can predict potential blocking or intermodulation issues and proactively select alternative access points that operate on frequencies less susceptible to interference from LTE signals.
Solution Approach 2:
The system dynamically adjusts WLAN access point selection based on real-time LTE signal conditions. When LTE transmission is detected on overlapping frequencies, the processing unit dynamically switches the WLAN to use different access points with non-overlapping frequencies, maintaining reliable WLAN communication despite the presence of LTE signals.
Data Source
AI summary
A wireless communication device includes a processing unit with first chip and second chip that operates in parallel with the first chip. The first chip transmits/receives data according to LTE. The second chip transmits/receives data over a WLAN. The processing unit determines access points (AP) through which data can be transmitted/received by the second chip over the WLAN; and identifies an optimal AP, based on factors including a determination, for each AP, of whether transmission/reception of data by the first chip according to the LTE standard, simultaneous to transmission/reception of data over the WLAN by the second chip, would decrease the overall throughput of the first and second chips. When the second chip is previously connected to the WLAN through any AP other than the optimal AP, the second chip is disconnected from the other AP, and it is connected to the WLAN through the optimal AP.