Sub-carrier Resource Mapping for Partial Frequency Multiplexing
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Solution Overview
Problem
Current two-level sub-carrier mapping methods lack an effective external mapping manner to flexibly allocate sub-carrier resources to frequency partitions in broadband wireless communication systems, limiting the combination of localized and distributed mapping with partial frequency multiplexing.
Innovation Solution
A method that divides physical resource units into two sets, where one set consists of N1 continuous units and the other of N2 continuous units, with the former allocated to frequency partitions and the latter permuted and allocated individually, allowing for flexible resource allocation based on system configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a two-level sub-carrier mapping manner is adopted with partial frequency multiplexing, then the combination of localized and distributed mapping can be realized, but there is no effective external mapping manner to flexibly allocate sub-carrier resources to frequency partitions
Solution Approach 1:
The patent segments the frequency domain resources into multiple frequency partitions, and further divides sub-carrier resources into two sets: a first set for localized mapping and a second set for distributed mapping. This segmentation enables flexible allocation to different frequency partitions while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent introduces dynamic allocation mechanisms where the number of sub-carriers in each set and their distribution to frequency partitions can be adjusted based on system configuration and service requirements. This dynamic approach provides adaptability without requiring complete redesign of the mapping structure.
2Productivity
If localized mapping manner is used, then frequency selective scheduling is supported, but frequency diversity cannot be generated
Solution Approach 1:
The patent merges localized mapping and distributed mapping within the same frequency partition by dividing sub-carrier resources into two sets. The first set applies localized mapping for frequency selective scheduling, while the second set applies distributed mapping for frequency diversity, thereby combining the advantages of both approaches.
Solution Approach 2:
The patent applies different mapping qualities to different portions of resources within the same frequency partition. The first set of sub-carriers receives localized mapping treatment for channels requiring frequency selective scheduling, while the second set receives distributed mapping treatment for channels benefiting from frequency diversity, optimizing performance for different service types.
3Reliability
If distributed mapping manner is used, then frequency diversity is generated, but frequency selective scheduling cannot be supported
Solution Approach 1:
The patent segments sub-carrier resources into two distinct sets with different mapping characteristics. This segmentation allows the system to simultaneously support both frequency selective scheduling (through the first set with localized mapping) and frequency diversity (through the second set with distributed mapping), resolving the mutual exclusivity issue.
4Device complexity
If all sub-carriers use the same mapping manner on the same OFDM symbol, then system simplicity is maintained, but the requirements on QoS of different services cannot be satisfied
Solution Approach 1:
The patent applies different mapping qualities locally within the same frequency partition by dividing sub-carriers into two sets. The first set uses localized mapping suitable for services requiring frequency selective scheduling, while the second set uses distributed mapping suitable for services benefiting from frequency diversity, thereby satisfying diverse QoS requirements without requiring completely separate systems.
Data Source
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AI summary
A method for mapping resource units is disclosed. The method includes: dividing the physical resource unit set to obtain a first physical resource unit set which is in a unit of N1 continuous physical resource units, and a second physical resource unit set into which the remaining physical resource units are put; permuting, in a unit of N2 continuous physical resource units, the physical resource units in the second physical resource unit set; allocating, in a unit of N1 continuous physical resource units, the physical resource units in the first physical resource unit set to each frequency partition, and allocating, in a unit of one physical resource unit, the permuted physical resource units in the second physical resource unit set to each frequency partition. By using the invention, the combination of external mapping under the two-level sub-carrier mapping manner in the partial frequency multiplexing with the localized mapping and the distributed mapping can be realized.