Wireless Transmission Resource Segmentation for Collision Reduction
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Solution Overview
Problem
In the mMTC scenario of 5G wireless communications, the high probability of collisions during random access by a large number of users leads to re-transmission issues, which affect communication quality and efficiency.
Innovation Solution
The proposed solution involves dividing transmission resources into separate portions for initial data transmission and data re-transmission in a predetermined domain, such as the time or frequency domain, using a double window scheme where initial data is transmitted in one window and re-transmissions occur in a back-off window, thereby reducing collisions and increasing successful transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission resources are shared for both initial data transmission and re-transmission, then resource utilization is improved, but collision probability increases
Solution Approach 1:
The transmission resource pool is segmented into two distinct parts: a first resource pool for initial data transmission and a second resource pool for re-transmission. This segmentation separates the resource usage for different transmission scenarios, reducing collision probability while maintaining overall resource utilization efficiency.
2Reliability
If separate resource pools are used for initial transmission and re-transmission, then collision probability is reduced, but resource overhead increases
Solution Approach 1:
The system applies different resource pool configurations to different transmission scenarios: the first resource pool is optimized for initial transmission with one set of parameters, while the second resource pool is optimized for re-transmission with another set of parameters. This local quality differentiation reduces overall collision probability while managing resource overhead through scenario-specific optimization.
3Adaptability or versatility
If random access is allowed for a large number of users, then user access capability is improved, but collision probability increases
Solution Approach 1:
By segmenting the resource pool into first and second resource pools for initial transmission and re-transmission respectively, the system enables large numbers of users to perform random access with reduced collision probability. The segmentation provides dedicated resources for each transmission stage, supporting high user access capability while maintaining reliability.
4Productivity
If re-transmission resources are not separated, then resource efficiency is improved, but successful transmission rate decreases
Solution Approach 1:
The segmentation of transmission resources into separate pools for initial transmission and re-transmission improves the successful transmission rate by reducing collisions. While this creates some resource overhead, the overall resource efficiency is maintained through the targeted allocation of resources to specific transmission stages, ensuring that re-transmissions have dedicated resources available.
Data Source
AI summary
Provided in the present disclosure are an electric apparatus and method for a wireless communication network control end, and electronic apparatus and method for a wireless communication network node. The electronic apparatus for the wireless communication network control end includes a processing circuit. The processing circuit is capable of determining how to divide wireless communication transmission resources in a predetermined domain, the divided transmission resources being employed for first-time transmission and re-transmission of a network node, respectively. The processing circuit is also capable of generating configuration information containing information of a dividing manner of the wireless communication transmission resources.