Virtual Resource Block Mapping for Wireless Diversity
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources to achieve diversity while minimizing signaling overhead, particularly in mapping virtual resources to physical resources.
Innovation Solution
The technique involves using a first mapping function to map contiguous virtual resources to non-contiguous physical resources and a second mapping function to allocate these resources within a selected subset of physical resources, employing a re-mapping function and permutation function to achieve diversity and efficient allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contiguous virtual resources are mapped to contiguous physical resources, then resource allocation is simple, but diversity cannot be achieved
Solution Approach 1:
The patent introduces virtual resource blocks (VRBs) as an intermediary layer between the allocation domain and the physical resource domain. The VRBs serve as a mediator that allows simple contiguous allocation in the virtual domain while enabling complex diversity-oriented mapping to physical resource blocks (PRBs) through mapping functions, thus resolving the contradiction between allocation simplicity and diversity achievement
Solution Approach 2:
The patent employs mapping functions that transform the parameters of resource allocation by changing the mapping relationship between virtual and physical resources. By using different mapping functions (e.g., interleavers, permutation functions), the system can dynamically change how contiguous VRBs are mapped to non-contiguous PRBs, achieving diversity while maintaining simple allocation logic
2Reliability
If diversity is achieved through complex mapping functions, then resource allocation performance improves, but signaling overhead increases
Solution Approach 1:
The patent extracts the complexity of diversity mapping from the signaling domain and places it in the physical layer mapping functions. The base station can allocate contiguous VRBs using simple signaling, while the complex diversity-oriented mapping to PRBs is performed automatically by the mapping functions, thus achieving diversity performance without increasing signaling overhead
Solution Approach 2:
The mapping functions operate autonomously to transform virtual resource allocations into physical resource allocations with diversity properties. The system self-manages the complex mapping transformations without requiring additional signaling to convey mapping details, as the mapping relationships are predetermined through standardized mapping functions
3Productivity
If virtual resources are mapped to a selected subset of physical resources, then resource allocation efficiency improves, but mapping complexity increases
Solution Approach 1:
The patent segments the physical resources into multiple subsets and allows mapping of virtual resources to selected subsets based on allocation requirements. This segmentation enables efficient resource utilization by directing allocations to appropriate subsets while the standardized mapping functions manage the complexity of subset selection and mapping
Data Source
AI summary
Techniques for mapping virtual resources to physical resources in a wireless communication system are described. In an aspect, a virtual resource (e.g., a virtual resource block) may be mapped to a physical resource in a selected subset of physical resources based on a first mapping function, which may map contiguous virtual resources to non-contiguous physical resources in the selected subset. The physical resource in the selected subset may then be mapped to an allocated physical resource (e.g., a physical resource block) among a plurality of available physical resources based on a second mapping function. In one design, the first mapping function may include (i) a re-mapping function that maps an index of the virtual resource to a temporary index and (ii) a permutation function (e.g., a bit-reversed row-column interleaver) that maps the temporary index to an index of the physical resource in the selected subset.