Co-located WLAN BWA Interference Coordination via Frame Timing
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Solution Overview
Problem
Wireless communication networks, such as BWA and WLAN, often experience interference due to concurrent transmissions, particularly when devices are co-located, as they operate within overlapping coverage areas using different frequency spectrums but still cause interference.
Innovation Solution
Implementing a method where wireless communication devices report frame-timing parameters from BWA networks to their WLAN node portions, allowing the WLAN access point to adjust downlink transmission times to avoid interference with uplink transmissions to the BWA network, thereby reducing interference by scheduling downlink transmissions during BWA network downlink subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication devices operate in both BWA and WLAN networks simultaneously, then network coverage and connectivity are improved, but interference between networks increases due to concurrent transmissions
Solution Approach 1:
The patent implements periodic time-division multiplexing where BWA and WLAN transmissions occur in alternating time slots. BWA downlink subframes are followed by uplink subframes, and WLAN transmissions are scheduled to avoid overlapping with BWA uplink transmissions. This periodic scheduling allows devices to switch between networks without simultaneous transmissions, eliminating interference while maintaining connectivity to both networks.
Solution Approach 2:
The patent dynamically adjusts WLAN transmission timing based on BWA frame structure and timing information. The WLAN access point receives BWA frame timing parameters and adapts its downlink transmission schedule in real-time to avoid conflicts with BWA uplink transmissions. This dynamic timing adjustment enables the system to maintain optimal performance for both networks under varying conditions.
2Productivity
If downlink transmissions are scheduled during BWA uplink subframes, then WLAN throughput is improved, but signal quality deteriorates due to interference with BWA uplink transmissions
Solution Approach 1:
The patent schedules WLAN downlink transmissions to occur during BWA downlink subframes rather than uplink subframes. This periodic alignment ensures that WLAN transmissions only occur when BWA devices are receiving rather than transmitting, eliminating uplink interference while maximizing WLAN throughput during available time slots.
Solution Approach 2:
The patent implements a feedback mechanism where the WLAN access point receives BWA frame timing information and uses this feedback to adjust its transmission schedule. The system continuously monitors BWA uplink subframe timing and adapts WLAN downlink transmissions accordingly, ensuring optimal throughput while maintaining signal quality by avoiding interference periods.
3Object-generated harmful factors
If frame-timing coordination is implemented between BWA and WLAN, then interference is reduced, but system complexity increases due to additional signaling and coordination requirements
Solution Approach 1:
The patent uses the WLAN access point as an intermediary that receives BWA frame timing parameters from BWA network nodes and translates this information into appropriate WLAN transmission schedules. This intermediary approach simplifies coordination by centralizing the timing synchronization function at the access point, avoiding the need for complex peer-to-peer coordination between all BWA and WLAN devices.
Solution Approach 2:
The patent implements preliminary action by having WLAN devices receive and process BWA frame timing information in advance before scheduling WLAN transmissions. The access point obtains timing parameters from BWA nodes beforehand and pre-configures its transmission schedule to avoid conflicts, eliminating the need for real-time complex coordination during actual data transmissions.
Data Source
AI summary
Embodiments of methods for coordinating communications among wireless networks and a co-located wireless communication device are generally described herein. Other embodiments may be described and claimed. In some embodiments, frame-timing parameters are reported by a broadband wireless access (BWA) network node to a node of a wireless local area network (WLAN), and the WLAN node may transmit the frame-timing parameters to an access point ad the WLAN. The BWA network node and the WLAN node may be co-located within the wireless communication device. The transmission time of downlink transmissions for receipt by the WLAN node may be selected by the access point based on the frame-timing parameters to reduce interference caused by concurrent uplink transmissions by the BWA network node.