Wireless Resource Scheduling with Dynamic UL DL Priority
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Solution Overview
Problem
In IEEE 802.16e-based wireless communication systems, the allocation of Downlink (DL) data bursts is often interrupted due to insufficient resource allocation, leading to transmission failures, especially for mobile stations at the edge of cells, and results in inefficient resource utilization and decreased throughput.
Innovation Solution
A method and apparatus for resource allocation scheduling that determines the order of UL and DL scheduling to maximize DL burst region allocation, prioritizing DL scheduling when necessary, and discarding non-essential messages to prevent interruptions, while efficiently managing UL resources to avoid waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UL scheduling is performed prior to DL scheduling, then UL resources are allocated first, but DL data burst transmission may be interrupted due to insufficient remaining region
Solution Approach 1:
The patent dynamically adjusts the scheduling order between UL and DL based on real-time system conditions and traffic requirements. The base station determines whether to perform UL scheduling or DL scheduling first by evaluating current resource status, message sizes, and transmission priorities, making the scheduling order flexible rather than fixed
Solution Approach 2:
The patent changes the scheduling parameter (order of UL/DL scheduling) based on different system states. By monitoring parameters such as the size of DL MAC management messages, the amount of remaining region, and transmission priorities, the system selects the appropriate scheduling order to optimize both reliability and efficiency
2Productivity
If DL burst region is maximally allocated, then DL transmission capacity increases, but UL resources may be insufficient for critical UL messages
Solution Approach 1:
The patent dynamically adjusts the DL burst region allocation based on real-time UL resource requirements. When critical UL messages need to be transmitted, the system reduces the DL burst region to ensure sufficient space for UL-MAP and other UL control messages, and vice versa, creating a balanced dynamic allocation
Solution Approach 2:
The patent performs preliminary assessment of UL resource requirements before finalizing DL burst allocation. By evaluating the size and priority of UL messages in advance, the system pre-determines the appropriate DL burst region size to ensure both DL capacity and UL reliability
3Reliability
If UL-MAP region is allocated first, then UL resource allocation is ensured, but remaining region for DL data burst becomes insufficient
Solution Approach 1:
The patent changes the allocation parameter (order of MAP region and data burst region) based on system conditions. When UL traffic is heavy or critical UL messages are present, the system allocates UL-MAP region first; when DL traffic dominates, it maximizes DL burst region first, optimizing the balance between UL reliability and DL capacity
Data Source
AI summary
A method and an apparatus for resource allocation scheduling in a wireless communication system are provided. The apparatus includes a scheduler for, if an UpLink (UL) scheduling for scheduling an allocation order of UL resources is performed prior to a DownLink (DL) scheduling for scheduling an allocation order of DL resources, setting a size α representing a size in which a DL burst region is maximally allocated in a DL sub frame, for, if the DL scheduling is performed prior to the UL scheduling, setting a size β representing a size in which the DL burst region is maximally allocated in the DL sub frame, for determining whether to discard a DL Medium Access Control (MAC) management message to be transmitted by using the size β, and for, if it is not determined to discard the DL MAC management message, determining a priority of a DL scheduling and a UL scheduling by using the size α and first performing one of the DL scheduling and the UL scheduling in accordance with the determined priority.