MoCA Controller Time-Frequency Allocation for Coaxial Interference
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Solution Overview
Problem
Conventional methods for time and frequency allocation on shared coaxial cables face challenges in enabling concurrent communications among multiple devices, leading to inefficiencies and interference due to inadequate management of timeslots and frequency bands.
Innovation Solution
A MoCA network controller system that uses data structures to dynamically allocate timeslots and frequency bands based on link parameters and reservation requests, ensuring minimal interference by considering the identity of devices, link characteristics, and ongoing transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional time and frequency allocation methods are used on shared coaxial cables, then device complexity is reduced, but communication reliability deteriorates due to interference and insufficient management of timeslots and frequency bands
Solution Approach 1:
The patent segments the frequency band into multiple subbands and the time period into multiple timeslots, creating a granular allocation structure. This segmentation allows independent management of different frequency-subband-timeslot combinations, enabling concurrent communications while maintaining reliability through精细化 control of interference-prone shared medium resources
Solution Approach 2:
The patent introduces a three-dimensional allocation framework combining frequency (subbands), time (timeslots), and spatial/device identity dimensions. By allocating resources across these three dimensions simultaneously, the system achieves comprehensive interference management and enables concurrent communications that would be impossible with conventional two-dimensional time-frequency allocation alone
2Productivity
If dynamic time and frequency allocation is implemented, then productivity increases through concurrent communications, but device complexity increases due to sophisticated allocation management requirements
Solution Approach 1:
By dividing the shared medium into discrete subbands and timeslots, the patent enables parallel communications across multiple segments simultaneously. This segmentation transforms a single-channel shared medium into multiple virtual channels, dramatically increasing productivity while the modular structure keeps management complexity tractable through systematic allocation rules
Solution Approach 2:
The patent implements dynamic allocation where subband and timeslot assignments are adjusted based on real-time communication demands and interference conditions. This dynamic approach maximizes productivity by adapting resource utilization to actual needs, while the structured framework provides the flexibility required for concurrent communications without excessive complexity
3Loss of time
If multiple devices communicate concurrently on shared coaxial cable, then loss of time is reduced, but object-generated harmful factors increase due to signal interference between simultaneous transmissions
Solution Approach 1:
The patent segments both frequency and time resources, assigning different subband-timeslot combinations to different device pairs. This dual segmentation ensures that concurrent transmissions occur in orthogonal resource spaces, eliminating signal interference while enabling parallel communications that reduce overall communication delay
Solution Approach 2:
The patent applies local quality by tailoring the allocation of specific subbands and timeslots to the characteristics of each device pair's communication link. By optimizing resource assignment locally for each communication pair based on their specific requirements and interference profiles, the system enables concurrent communications without harmful interference while minimizing total communication time
Data Source
AI summary
Circuitry for use in a network controller comprises a processor and memory. The network controller is operable to control communications in a network comprising a plurality of devices connected via a shared coaxial cable. The circuitry is operable to maintain one or more data structures that hold per-sender-receiver-pair link parameters and per-sender-receiver-pair bandwidth grant status. The circuitry is operable to, in response to receipt of a reservation request on the shared coaxial cable, decide which one or more of a plurality of subbands and which one or more of a plurality timeslots to reserve for the transmission based, at least in part, on the per-sender-receiver-pair link parameters and the per-sender-receiver-pair bandwidth grant status in the one or more data structures. The circuitry is operable to generate a reservation grant message that indicates the decided one or more subbands and the decided one or more timeslots.