Bitmap Resource Indication for 5G Scheduling Flexibility
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Solution Overview
Problem
In the 5G system, the fixed number of bits in the bitmap for resource allocation leads to waste of control signaling overhead and limited flexibility due to varying RBG sizes with different bandwidth parts, resulting in inefficient resource indication.
Innovation Solution
A resource indication method using a bitmap that corresponds to at least two resource block group sizes, where the first device sends a bitmap with a first part of bits for a larger resource block group size and a second part of bits for a smaller size, optimizing the allocation to maximize bit usage without increasing the bitmap length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed-size bitmap is used for resource allocation, then the control signaling structure is simple, but the control signaling overhead is wasted due to unused bits and scheduling flexibility is limited
Solution Approach 1:
The bitmap is segmented into multiple fields, where each field corresponds to a specific RBG size. The first field indicates resource allocation for a first RBG size, and the second field indicates resource allocation for a second RBG size. This segmentation allows the system to use only the necessary bits for the actual RBG size, eliminating wasted bits while maintaining a structured bitmap format.
Solution Approach 2:
The bitmap structure is made dynamic by allowing different fields to be activated based on the actual RBG size. When the RBG size changes, the system dynamically selects which field to use, ensuring that the bitmap adapts to different scheduling scenarios without requiring a fixed maximum-size structure that would leave bits unused.
2Adaptability or versatility
If the bitmap size is increased to accommodate varying RBG sizes, then scheduling flexibility is improved, but the control signaling overhead increases
Solution Approach 1:
Instead of using a single large bitmap that accommodates all possible RBG sizes, the solution segments the bitmap into multiple smaller fields, each optimized for a specific RBG size. This allows the system to achieve scheduling flexibility for different RBG sizes while keeping each field compact, thereby avoiding the overhead increase that would result from using a single maximum-size bitmap.
Solution Approach 2:
The segmented bitmap structure serves multiple functions: each field can be independently used depending on the RBG size, making the overall structure universal and adaptable to different scheduling scenarios. This multi-functionality allows the system to maintain low overhead while achieving high scheduling flexibility, as the same bitmap structure can handle various RBG sizes without requiring size increases.
3Stability of the object's composition
If bits are filled with 0 for unused positions in the bitmap, then the bitmap structure remains fixed, but resource indication efficiency decreases
Solution Approach 1:
The bitmap is divided into multiple fields, each corresponding to a specific RBG size. This segmentation eliminates the need to fill unused positions with 0, as each field is sized appropriately for its corresponding RBG size. The first field handles resource indication for the first RBG size, and the second field handles resource indication for the second RBG size, ensuring that all bits in each field are utilized efficiently without waste.
Solution Approach 2:
The system changes the effective size of the bitmap based on the RBG size by activating different fields. When the RBG size changes, the system changes which field is active, effectively changing the parameter of the bitmap size to match the actual needs. This dynamic parameter adjustment improves resource indication efficiency by ensuring that all bits are used meaningfully without requiring fixed-size padding.
Data Source
AI summary
Disclosed are a resource indication method and device, and a computer storage medium. The method may include: a first device sends a first bitmap to a second device, the first bitmap being used for indicating a frequency domain resource for data or signaling transmission between the first device and the second device, and the first bitmap corresponding to at least two resource block group sizes.