Circuit Mode Resource Allocation in BWA Systems
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Solution Overview
Problem
Conventional circuit mode resource allocation in Broadband Wireless Access (BWA) systems faces inefficiencies due to a two-dimensional allocation scheme that is not backward compatible with existing standards and results in resource wastage and holes, making it difficult to allocate resources effectively.
Innovation Solution
A method and apparatus for periodic resource allocation in BWA systems using a one-dimensional allocation scheme with a used slot bitmap to efficiently allocate and deallocate resources without holes, ensuring backward compatibility by generating and utilizing slot bitmap information to allocate resources only to unused slots, thereby reducing overhead and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a two-dimensional allocation scheme is used in circuit mode, then resource allocation can be performed, but backward compatibility with existing standards is lost
Solution Approach 1:
The patent transitions from a two-dimensional allocation scheme to a one-dimensional allocation scheme by using a bitmap structure that linearly represents available time slots. This dimensional simplification maintains backward compatibility with existing standards while enabling efficient circuit mode resource allocation without holes.
2Productivity
If circuit mode resource allocation is implemented, then resource reservation is simplified, but resource holes are generated leading to inefficient utilization
Solution Approach 1:
The patent implements a feedback mechanism where the base station maintains a bitmap structure that continuously updates the status of time slots based on actual resource allocation and deallocation events. This feedback allows the system to identify and fill resource holes by reallocating slots to available users, thereby eliminating waste and improving overall resource utilization efficiency.
3Loss of information
If resource allocation messages are sent in every frame, then resource allocation is precise, but overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the bitmap structure and allocation parameters before the actual resource allocation process begins. The base station pre-calculates and announces the allocation strategy in advance, allowing terminals to prepare for resource reception without requiring continuous detailed messaging in every frame, thus reducing overhead while maintaining allocation accuracy.
Data Source
AI summary
An apparatus and method for circuit mode resource allocation in a Broadband Wireless Access (BWA) system is disclosed. The method includes generating a first resource allocation message which comprises currently used slot bitmap information with respect to a circuit mode region in a frame; allocating resources to one or more terminals with respect to currently unused slots in the circuit mode region according to the currently used slot bitmap information; and generating a second resource allocation message which comprises information relating to the resource allocation. Thus, the effective circuit mode resource allocation can be achieved without holes in the circuit mode, while maintaining backward compatibility with the existing standards.