Request Opportunity Parameters in OFDMA Mini-Slots
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Solution Overview
Problem
Current communication systems face challenges in coordinating transmissions between devices, particularly in one-to-many topologies, leading to performance degradation as the number of devices increases, without adequate means for effective coordination of transmissions.
Innovation Solution
The implementation of a communication system that uses orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frames, where devices can request transmission opportunities within mini-slots, allowing for coordinated data transmission by processing and extracting request opportunity parameters to generate and transmit requests, and subsequently receiving grants for data exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices transmit data simultaneously in a one-to-many topology, then data communication can occur between all devices, but transmission coordination fails and performance degrades
Solution Approach 1:
The system performs preliminary actions by establishing transmission coordination protocols before actual data transmission occurs. Devices exchange capability information and negotiate transmission parameters in advance, ensuring that when data transmission begins, all devices are already synchronized and coordinated, preventing the performance degradation that would occur without prior coordination.
2Adaptability or versatility
If the number of devices in the communication system increases, then network coverage and connectivity improve, but transmission coordination becomes more difficult and performance degrades
Solution Approach 1:
The communication system segments the coordination process into distinct phases: capability information exchange, transmission parameter negotiation, and actual data transmission. This segmentation allows the system to manage complexity by handling coordination tasks in discrete, manageable steps rather than attempting to coordinate all devices simultaneously, enabling the network to scale to more devices without proportionally increasing coordination difficulty.
3Reliability
If devices attempt to coordinate transmissions using prior communication protocols, then some level of transmission coordination is achieved, but adequate coordination capability is not provided for new communication systems
Solution Approach 1:
The coordination mechanism is designed to be dynamic rather than static. Devices can adapt their coordination approach based on the specific requirements of the communication system and the capabilities of the devices involved. The system negotiates transmission parameters in real-time, allowing it to adjust to different network configurations and device capabilities, providing both reliable coordination and adaptability to new communication systems.
Data Source
AI summary
A communication device is configured to receive a message that indicates request opportunity parameter(s). Based on the request opportunity parameter(s), the communication device is configured to generate and transmit a transmission request within one of two or more request opportunities (e.g., 2, 3, 4, etc. or generally N request opportunities such that N is a positive integer greater than or equal to 2) indicated by the request opportunity parameter(s). The two or more request opportunities are included within mini-slot(s) that span OFDM sub-carrier(s) of OFDM or OFDMA framing. A given mini-slot spans an OFDM or OFDMA frame, and a mini-slot is divided into any desired number of portions (e.g., 2, 3, 4, etc. or generally N portions) such that each of the request opportunities within that mini-slot occupies a common fraction of the mini-slot (e.g., each occupies ½, ⅓, ¼, etc. or generally 1/N of the mini-slot).