Converged MAC Adaptor for OFDMA-PON Sub-Carrier Allocation
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Solution Overview
Problem
Current technologies face challenges in providing a high-capacity transmission service that integrates both wired and wireless services efficiently, particularly in next-generation passive optical networks, where existing solutions like TDMA-PON offer limited bandwidth and signal quality for gigabit-capable services.
Innovation Solution
A wired/wireless converged media access control (MAC) adaptor is developed to facilitate seamless service integration by converting Ethernet and CPRI data into OFDM frames, dynamically allocating sub-carriers based on data transmission characteristics, and monitoring bit error rates using bit-interleaved parity, enabling efficient transmission over OFDMA-PON.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If TDMA-PON is used for wired access network, then gigabit-capable transmission link can be provided, but transmission band is limited to 300 Mbps on average due to time division multiplexing
Solution Approach 1:
The patent transitions from TDMA time division multiplexing to OFDMA frequency division multiplexing, changing the fundamental parameter of resource allocation. This allows simultaneous transmission on multiple sub-carriers, providing gigabit-capable transmission while maintaining high average throughput through parallel frequency channels
2Power
If OFDM technology is applied to next generation PON, then transmission band of 1 Gbps or higher per subscriber can be provided, but requires complex MAC adaptor for convergence
Solution Approach 1:
The patent merges wired Ethernet MAC and wireless WLAN MAC functions into a single converged MAC adaptor. This integration reduces device complexity by consolidating multiple MAC layers into one unified component that handles both wired and wireless traffic through a single OFDMA-PON interface
Solution Approach 2:
The converged MAC adaptor is designed with multi-functionality to handle both wired Ethernet frames and wireless WLAN frames simultaneously. It provides universal access to OFDMA-PON for different service types, eliminating the need for separate MAC adaptors for wired and wireless services
3Adaptability or versatility
If separate wired and wireless access networks are maintained, then existing services can be supported, but seamless integrated service cannot be provided
Solution Approach 1:
The patent merges separate wired and wireless access networks into a unified OFDMA-PON infrastructure. The converged MAC adaptor enables both Ethernet and WLAN traffic to share the same optical network, providing seamless integrated services while improving network efficiency through resource consolidation
Data Source
AI summary
A wired/wireless converged media access control (MAC) adaptor and a method for transmitting a frame using the same. The wired/wireless converged MAC adaptor may include a service network interface (SNI) to transmit a MAC frame corresponding to a wired or wireless service, or common public radio interface (CPRI) data, a frame conversion unit to convert, into an orthogonal frequency division multiplexing (OFDM) frame, a wired/wireless converged MAC frame having a common frame structure of the MAC frame corresponding to the wired or wireless service or the CPRI data, and an OFDM interface configured to transmit the OFDM frame to an optical OFDM modem by dynamically allocating sub-carriers based on data transmission characteristics.