OFDM Scheduling System for Dynamic QCI-Based Resource Allocation
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Solution Overview
Problem
In wireless communication networks, data communications often lag behind voice communications due to prioritization based solely on voice communications, leading to increased latency and delayed data transfer during heavy traffic conditions.
Innovation Solution
An Orthogonal Frequency Division Multiplexing (OFDM) communication system that processes Quality-of-Service Class Identifiers (QCIs) to determine if data communications can be scheduled in place of voice communications by reallocating Resource Blocks, allowing data communications to be prioritized and transferred alongside voice communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voice communications are prioritized over data communications, then voice communication quality is improved, but data communication latency increases
Solution Approach 1:
The patent implements dynamic QCI value assignment where the network can switch between different QCI values (e.g., from traditional voice-priority values to data-priority values) based on real-time traffic conditions and user requirements. This dynamic adjustment allows the system to adapt prioritization strategies, resolving the contradiction between maintaining voice quality and reducing data latency.
Solution Approach 2:
The patent changes the QCI parameter values dynamically to alter communication prioritization. By assigning different QCI values to different communication types and allowing modification of these values based on network conditions, the system can balance between voice and data communication requirements, transforming a static prioritization model into a flexible one that addresses both needs.
2Reliability
If data communications are delayed to accommodate voice communications, then voice communication priority is maintained, but data communication productivity decreases
Solution Approach 1:
The system dynamically adjusts resource allocation and QCI values based on real-time network conditions. When data traffic is light and voice quality is critical, voice priority is maintained. When data traffic is high and voice quality can be maintained with shared resources, the system switches to allow data communications to proceed with higher productivity, thus resolving the contradiction between priority maintenance and throughput.
Solution Approach 2:
The patent implements preliminary QCI value assignment and resource reservation mechanisms. By pre-configuring QCI values and reserving resources based on predicted traffic patterns and user requirements, the system can prepare for future communication needs, allowing both voice and data communications to proceed efficiently without significant delays, thereby maintaining both priority and productivity.
3Device complexity
If strict QCI-based prioritization is implemented, then communication management is simplified, but communication flexibility is reduced
Solution Approach 1:
The patent combines structured QCI-based management with dynamic adjustment capabilities. The base QCI framework provides simple management, while dynamic QCI modification based on real-time conditions, user requests, and network state introduces flexibility. This hybrid approach maintains management simplicity through the structured framework while achieving adaptability through dynamic elements.
Solution Approach 2:
The system segments communication types into different QCI categories (voice, video, data, etc.) for simplified management, while allowing individual QCI values to be dynamically adjusted within their categories. This segmentation provides the structured overview needed for simple management, while the granular dynamic adjustment capability within segments maintains scheduling flexibility.
Data Source
AI summary
An Orthogonal Frequency Division Multiplexing (OFDM) communication system and method to schedule transfers of first and second user communications between the FDM communication system and a Wireless Communication Device (WCD) are provided. The OFDM communication system in one example includes an OFDM scheduling system to process Quality-of-Service Class Identifiers (QCIs) and determine if the first user communication having a first QCI can be scheduled subsequently and if the second user communication having a second QCI can be scheduled in place of the first user communication, and if the first user communication can be scheduled subsequently and the second user communication should be scheduled in place of the first user communication, then schedule the second user communication in place of the first user communication. An OFDM transceiver wirelessly transfers the second user communication in place of the first user communication between the OFDM communication system and the WCD based on scheduling.