Fixed Bitmap Resource Block Group Allocation for Wireless Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the varying transmission bandwidths in LTE and 5G networks lead to increased blind detection complexity for terminal devices due to the need for different-sized bitmaps to indicate Resource Block Groups (RBGs), resulting in higher time delays and power consumption.
Innovation Solution
A method where terminal and network devices determine the RBG size based on a specific parameter M and transmission bandwidth, using bitmaps of a fixed size to indicate RBGs, thereby reducing blind detection complexity by dynamically adjusting RBG sizes according to changing bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If different-sized bitmaps are used to indicate RBGs for different transmission bandwidths, then the resource allocation accuracy is improved, but the blind detection complexity increases
Solution Approach 1:
The patent changes the parameter of bitmap size from variable to fixed. By using a fixed-size bitmap (e.g., 35 bits) regardless of transmission bandwidth, the blind detection complexity is reduced while resource allocation accuracy is maintained through proper mapping of bitmap bits to RBGs based on the determined RBG size.
Solution Approach 2:
The patent introduces dynamic RBG size determination based on transmission bandwidth while keeping bitmap size fixed. The RBG size is dynamically adjusted (e.g., through formulas or lookup tables) according to the actual transmission bandwidth, allowing the system to adapt to different bandwidth conditions without changing bitmap structure.
2Measurement precision
If different-sized bitmaps are used for different transmission bandwidths, then the resource allocation precision is improved, but the time delay increases
Solution Approach 1:
By fixing the bitmap size parameter and making RBG size dynamic, the patent eliminates the time required for the terminal to adapt bitmap processing to different bandwidths. The terminal can directly use the fixed-size bitmap with pre-determined RBG sizing rules, reducing processing time delay while maintaining allocation precision.
3Measurement precision
If different-sized bitmaps are used for different transmission bandwidths, then the resource allocation accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent reduces power consumption by fixing the bitmap size parameter. This eliminates the need for the terminal device to dynamically adjust its processing logic and computational resources based on bandwidth changes, thereby reducing the energy required for blind detection and resource allocation operations while maintaining allocation accuracy through dynamic RBG size calculation.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Disclosed are a data transmission method, a terminal device and a network device. The method comprises: a terminal device determining, according to a specific parameter M and used transmission bandwidth, the size of a resource block group (RBG) under the transmission bandwidth, wherein M is a positive integer; receiving a bit image borne in downlink control information, sent by a network device, wherein the bit image includes M bits; determining, according to a value on the N bits in the M bits, a target RBG for transmitting data in N RBGs in the transmission bandwidth, wherein N is determined according to the transmission bandwidth and the size of the RBG, and N is a positive integer less than or equal to M; and transmitting the data between the target RBG and the network device. Therefore, using bit images of the same size to indicate the RBG when different transmission bandwidths are used can reduce blind detection complexity of the terminal device.