Obviousness

Obviousness Analysis (35 U.S.C. § 103) for US Patent 12414002

This analysis identifies potential combinations of prior art references that could render the claims of US Patent 12414002 obvious to a person having ordinary skill in the art (POSA). Obviousness under 35 U.S.C. § 103 requires showing that the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious to a POSA before the effective filing date of the claimed invention. The motivation to combine references often stems from recognized needs or problems, known methods for combining elements, or design choices and market demands.

The claimed invention focuses on low-latency wireless messaging, particularly in the HF band utilizing ionospheric propagation, with an emphasis on encoding messages to reduce latency and selecting transmission parameters based on estimated propagation latency and channel bandwidth.

Overview of Key Claims:

• Claim 1 (Method for Transmission): Receiving a message, encoding it to reduce latency, and transmitting the encoded message over an ionospheric HF band using parameters selected based on estimated propagation latency and predefined channel bandwidth.
• Claim 15 (Device for Transmission): A device performing the steps of Claim 1.
• Claim 18 (Method for Reception): Receiving an encoded message, decoding it, and performing an action based on the decoded message.

Prior Art References and Their Contributions:

The patent explicitly lists numerous prior art documents in the "Citations" section. While a detailed analysis of each cited patent and non-patent literature is beyond the scope of this summary, we can categorize their general contributions based on their titles and typical focus areas:

Prior Art that addresses communication systems, data transmission, and wireless networks:

• US5426513A: "Prioritized image transmission system and method"
• WO1996002905A1: "Satellite based aircraft traffic control system"
• US5982813A: "Demand-based power and data rate adjustments to a transmitter to optimize channel capacity and power usage with respect to data transmission traffic over a fixed-bandwidth channel"
• US6104712A: "Wireless communication network including plural migratory access nodes"
• US20020184645A1: "Measurement of quality of service"
• US20050203673A1: "Wireless communication framework"
• US20070147251A1: "Technique for adaptive data rate communication over fading dispersive channels"
• US20100241759A1: "Systems and methods for sar-capable quality of service"
• US8542763B2: "Systems and methods to coordinate transmissions in distributed wireless systems via user clustering"
• US8654815B1: "System and method for distributed antenna wireless communications"

Prior Art that addresses HF communication, modulation, and error correction:

• US20020122468A1: "Quasi orthogonal hybrid walsh-PN codes for CDMA application in HF modems"
• US7180970B1: "Automatic link establishment using external synchronization"
• ITU-R p. 533-10: "Method for the prediction of the performance of HF circuits" (Non-patent literature)
• Guimaraes, Dayan Adionel: "Contributions to the Understanding of the MSK Modulation" (Non-patent literature)
• US20090300469A1: "System and method for inter-packet channel coding and decoding"
• US7672365B2: "Apparatus and methods for communicating using symbol-modulated subcarriers"
• US20090103598A1: "Link adaptation in wireless networks for throughput maximization under retransmissions"

Prior Art that addresses data compression and encoding:

• US20020164027A1: "Compression for asymmetric data links"
• US20130132796A1: "Accelerated Cyclical Redundancy Check"
• US20130283126A1: "Error detection within a memory"
• US20130132795A1: "Semiconductor storage device, method of controlling the same, and error correction system"

Prior Art that addresses financial transactions/HFT (indirectly by field):

• Phillips, Matthew: "High-Speed Trading: My Laser is Faster Than Your Laser" (Non-patent literature, indicates industry need for speed)

Obviousness Combinations and Motivations:

Here, we consider how a POSA (e.g., a telecommunications engineer with experience in wireless systems, including HF communications and network optimization) would combine these references.

1. Combination of US5982813A + ITU-R p. 533-10 + US20020164027A1:

• US5982813A (Demand-based power and data rate adjustments to optimize channel capacity): This patent teaches adjusting transmission parameters (power, data rate) to optimize channel capacity given a fixed bandwidth. This directly aligns with the concept of determining transmission parameters based on predefined channel bandwidth requirements.

• ITU-R p. 533-10 (Method for the prediction of the performance of HF circuits): This non-patent literature provides established methods for predicting HF circuit performance, including propagation characteristics like time-of-flight (propagation latency). A POSA would be familiar with such methods for optimizing HF communications.

• US20020164027A1 (Compression for asymmetric data links): This patent addresses data compression, a known technique for reducing message size.

• Motivation to Combine: A POSA aiming to achieve "low latency wireless messaging" (the stated objective of US12414002) in the HF band would naturally consider these elements. The inherent variability and limited bandwidth of HF ionospheric channels (as understood from ITU-R p. 533-10) would strongly motivate a POSA to:

  1. Reduce message size: Employing data compression (as taught by US20020164027A1) would directly reduce "message size latency" as described in US12414002, thus improving overall latency.
  2. Optimize transmission parameters: Using a system that adjusts transmission parameters (like power and data rate from US5982813A) based on the channel's estimated performance (from ITU-R p. 533-10) and predefined bandwidth limits is a logical step to ensure reliable and efficient transmission within the constraints of the HF environment. The "demand-based" aspect of US5982813A could be readily adapted to prioritize latency-sensitive messages.
  3. Applying to HF/Ionospheric: The explicit mention of HF circuits in ITU-R p. 533-10 provides a direct motivation for applying these optimization and compression techniques to ionospheric HF transmissions.

This combination renders obvious the core aspects of Claim 1, 15, and 18, which involve encoding messages for latency reduction, determining transmission parameters based on estimated propagation latency and channel bandwidth, and transmitting/receiving these messages.

2. Combination of US20020122468A1 + US20070147251A1 + Phillips (HFT context):

• US20020122468A1 (CDMA application in HF modems): This patent describes specific modulation techniques (CDMA) for HF modems, indicating a focus on efficient and robust HF communication.

• US20070147251A1 (Adaptive data rate communication over fading dispersive channels): This reference teaches adapting data rates (and implicitly other transmission parameters like modulation) in challenging wireless channels, which HF ionospheric channels certainly are.

• Phillips, Matthew (High-Speed Trading: My Laser is Faster Than Your Laser): This non-patent literature highlights the extreme importance of speed and low latency in contexts like High-Frequency Trading (HFT).

• Motivation to Combine: Given the well-known latency demands of applications like HFT (emphasized by Phillips), a POSA would be highly motivated to combine existing HF communication technologies with adaptive techniques to minimize delay.

  1. Improving HF for speed: Recognizing that HFT demands ultra-low latency, a POSA would seek to optimize HF communications, which inherently have higher propagation delays than line-of-sight. The use of specific HF modem technologies (like those in US20020122468A1) could be adapted or selected for lower latency characteristics.
  2. Adaptive optimization for latency: The adaptive data rate communication (US20070147251A1) would be employed to dynamically adjust transmission parameters to achieve the lowest possible latency under varying ionospheric conditions, rather than just maximizing throughput or capacity. This adaptation would explicitly consider estimated propagation latency (as taught by general HF prediction methods, such as ITU-R p. 533-10 if implicitly referenced, or simply as a known variable in adaptive communication).
  3. Encoding for further reduction: The concept of encoding messages to be smaller for faster transmission, as explicitly taught in US12414002, would be an obvious design choice for a POSA trying to meet the stringent latency requirements of HFT in any communication medium, especially one with inherent delays like HF. References like US20020164027A1 provide the underlying compression technology.

This combination renders obvious the application of low-latency HF messaging techniques to financial transactions, where the encoding and adaptive parameter selection are driven by the critical need for speed.

Conclusion:

Based on the nature of the cited prior art, a person of ordinary skill in the art would have been motivated to combine known techniques for data compression, HF propagation prediction, and adaptive transmission parameter adjustment within predefined bandwidths to achieve low-latency wireless messaging, particularly for latency-sensitive applications like financial trading. The combinations highlighted above demonstrate how the core elements of US Patent 12414002 would have been obvious prior to its effective filing date.