PDCCH Resource Mapping for Distributed VRBs in Large 5G Bandwidths
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Solution Overview
Problem
Existing communication protocols fail to support efficient resource mapping of distributed Virtual Resource Blocks (DVRBs) in scenarios with large resource allocation and large bandwidth configurations, particularly in 5G systems, and do not account for the two types of Precoding Resource Block Groups (PRGs) in New Radio (NR) systems.
Innovation Solution
A resource mapping method and network side device that determine and distribute VRBs to PRBs using interleavers, controlling interleaving granularity and frequency gaps to optimize resource utilization and diversity gain, while ensuring resource continuity and minimizing fragmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large resource allocation and large bandwidth configuration are used in 5G systems, then data throughput is improved, but resource mapping of distributed Virtual Resource Blocks becomes unsupported by existing protocols
Solution Approach 1:
The patent changes the parameter of frequency gap size in DVRB mapping. It introduces two different frequency gap configurations: a first frequency gap for when the quantity of DVRBs is less than or equal to the quantity of PRBs, and a second frequency gap for when the quantity of DVRBs exceeds the quantity of PRBs. This parameter adaptation enables protocol compatibility while supporting large bandwidth configurations in 5G systems.
2Reliability
If distributed Virtual Resource Block mapping is implemented across the entire cell bandwidth, then frequency diversity gain is improved, but resource fragmentation increases
Solution Approach 1:
The patent applies local quality by making the frequency gap configuration context-dependent. Instead of using a uniform frequency gap across all scenarios, it locally adapts the frequency gap size based on the specific condition of whether the quantity of DVRBs is less than or equal to the quantity of PRBs or exceeds it. This local adaptation optimizes both frequency diversity and resource continuity for different operating conditions.
3Ease of operation
If a smaller frequency gap is used for DVRB mapping in LTE systems, then distributed transmission is enabled, but resource allocation efficiency decreases for large resource allocations
Solution Approach 1:
The patent introduces dynamics by making the frequency gap configuration adaptive rather than static. The system dynamically selects between a first frequency gap and a second frequency gap based on the relationship between the quantity of DVRBs and the quantity of PRBs. This dynamic adaptation enables distributed transmission when needed while optimizing resource allocation efficiency for large resource allocations in 5G systems.
Data Source
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AI summary
A resource determination method performed by a UE (600) includes: receiving (201) resource mapping configuration information about a PDCCH from a network side device (500); and determining (202) a bandwidth to which VRBs map in a distributed manner in accordance with one or more configuration parameters in the resource mapping configuration information. The receiving resource mapping configuration information about the PDCCH from the network side device includes receiving L1 signaling carrying the resource mapping configuration information therein from the network side device, and the L1 signaling is used to notify the UE to select one resource mapping configuration mode from a plurality of resource mapping configuration modes.