Wireless Packet Preamble Reference Sequence Interference Mitigation
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Solution Overview
Problem
Wireless networks experience interference between communication packets due to proximity and similar construction of packets, leading to misinterpretation and missed data reception, especially in multipoint, multi-hop networks where one communication link can interfere with others.
Innovation Solution
The solution involves configuring packets with unique reference sequences inserted into their preambles based on specific wireless links, allowing receivers to differentiate between intended and interfering packets, thereby preventing lock-on to incorrect signals and mitigating interference by grouping links and assigning distinct codes to interfering groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are transmitted over wireless links using standard construction, then communication can be established between nodes, but packet interference occurs when multiple nodes transmit simultaneously causing receivers to misinterpret or miss data
Solution Approach 1:
The patent applies local quality by inserting link-specific reference sequences into the preambles of packets transmitted over specific wireless links. Each link is assigned a unique reference sequence that is inserted at the beginning of packets on that link, allowing receivers to locally identify and correlate signals from the intended transmitter while rejecting interference from other links. This localized differentiation at the packet level resolves the interference problem without requiring system-wide changes to the communication protocol.
2Reliability
If unique reference sequences are inserted into packet preambles for each wireless link, then packet interference is reduced and data reception accuracy is improved, but packet configuration complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-assigning unique reference sequences to each wireless link before communication begins. The network controller or management system configures and distributes the appropriate reference sequence to each transmitter-receiver pair in advance, storing them in lookup tables or configuration databases. When a packet needs to be transmitted, the transmitter simply retrieves the pre-assigned reference sequence for its link and inserts it into the preamble, rather than generating or selecting sequences in real-time. This preliminary configuration reduces the computational complexity during actual packet transmission while maintaining the interference mitigation benefits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces packet interference by ensuring receivers correctly identify and process intended packets, improving data reception accuracy and network performance by correlating packet preambles with specific reference sequences, thus minimizing the impact of interfering signals.
Implementation Method 1
correlating at least a portion of the preamble with the reference sequence that is selected based on the wireless link
Data Source
AI summary
Apparatuses, methods, and systems of mitigating packet interference are disclosed. One method includes receiving, by a sector, data to be transmitted over a specific wireless link of a wireless network, configuring a packet for transmission over the specific wireless link, wherein the packet includes a preamble, and the data, and transmitting, by the sector, the configured packet over the specific wireless link. Configuring the packet includes identifying a reference sequence based on the specific wireless link, and inserting the reference sequence into at least a portion of the preamble.