User Equipment BWP RBG Alignment Through a Common Grid
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Solution Overview
Problem
Existing 3GPP technologies face inefficiencies in resource block group (RBG) allocation due to misaligned RBG grids across different user equipment (UE) bandwidth parts (BWPs), leading to interference and reduced communication efficiency.
Innovation Solution
Implementing a common frequency resource allocation grid per cell, using a common RBG grid for all UEs, and calculating the size and frequency location of RBGs based on a reference point (PRB #0CMN) to align BWPs, ensuring efficient multiplexing and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate RBG grids are used for different UEs with different BWPs, then each UE can be allocated resources efficiently within its own BWP, but RBG misalignment occurs between different UEs leading to interference and reduced scheduling efficiency
Solution Approach 1:
The patent merges the RBG grids of different UEs into a single common RBG grid that is aligned across all BWPs in a cell. This is achieved by defining a common reference point (PRB #0CMN) and ensuring all RBGs are sized and positioned relative to this common reference, eliminating the misalignment problem while maintaining efficient resource allocation for each UE.
Solution Approach 2:
The patent creates an equipotential RBG grid where all UEs operate on the same RBG alignment reference frame. By establishing a common reference point and uniform RBG sizing across all BWPs, the system ensures that RBGs are at the same 'potential' level (aligned position) for all UEs, enabling efficient multiplexing without interference.
2Object-affected harmful factors
If a common RBG grid is implemented for all UEs, then RBG alignment and interference reduction are improved, but the complexity of calculating RBG size and frequency location increases
Solution Approach 1:
The patent performs preliminary action by pre-defining the common reference point (PRB #0CMN) and establishing the RBG sizing rules before actual resource allocation occurs. This allows the network to pre-calculate and configure RBG boundaries for all BWPs, simplifying the real-time allocation process while maintaining common grid alignment.
Solution Approach 2:
The common reference point (PRB #0CMN) acts as an intermediary element that mediates between different BWPs and UEs. Instead of directly calculating complex overlapping grids for each UE, the system uses this common reference as an intermediate framework to derive all RBG configurations, significantly simplifying the calculation process.
3Device complexity
If RBG size is uniformly configured for all BWPs, then common grid alignment is simplified, but BWPs with different bandwidths cannot be optimally allocated
Solution Approach 1:
The patent segments the BWP into multiple RBGs of uniform size, where the number of segments (RBGs per BWP) varies based on the BWP size. While individual RBGs maintain uniform sizing for grid alignment, the total number of RBGs and their aggregate coverage adapts to different BWP bandwidths, achieving both simplicity and flexibility.
Solution Approach 2:
The patent changes the parameter of RBG quantity rather than RBG size to adapt to different BWP bandwidths. By keeping RBG size uniform for alignment but allowing the number of RBGs per BWP to vary, the system maintains grid simplicity while achieving flexible allocation for different BWP configurations.
Data Source
AI summary
Various communication systems may benefit from an improved resource block group allocation in a cell. A method may include determining at a network entity a common frequency resource allocation grid in a cell. The method may also include configuring at the network entity a frequency location of a bandwidth part of a user equipment within the cell. The frequency location of the bandwidth part may be offset from a reference point of the common frequency resource allocation grid. In addition, the method may include determining a size of one or more of a plurality of resource block groups within the bandwidth part of the user equipment based on the frequency location of the bandwidth part and the reference point. Further, the method may include transmit downlink control information from the network entity to the user equipment.