LTE System Information Scheduling via Sub-Frame Separation
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Solution Overview
Problem
In the LTE system, the retransmission of SI-1 affects the scheduling of other SIs, leading to reduced space for other system information transmission and difficulty for terminals to determine the starting and ending times of SI transmissions, especially when scheduling periods have overlapping relationships.
Innovation Solution
The method involves setting sub-frames for transmitting and receiving SI-1 and other SIs in different time domains, allowing their transmission windows to overlap, and prioritizing the transmission of SIs with prior sequences, ensuring that SIs with continuous retransmission are transmitted only once in overlapping windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SI-1 is retransmitted multiple times in a scheduling period to improve coverage range, then the coverage range of system information is improved, but the space for other system information transmission is reduced
Solution Approach 1:
The patent introduces a new dimension for resource allocation by allowing transmission windows of SI-1 and other SIs to overlap in time while assigning them different sub-frames within the window. This transforms a one-dimensional time-based scheduling problem into a two-dimensional solution combining time windows and sub-frame positions, enabling both SI-1 retransmissions and other SI transmissions to coexist without mutual exclusion.
2Productivity
If transmission windows of SI-1 and other SIs are allowed to overlap to improve resource utilization, then transmission resource efficiency is improved, but terminal complexity for determining transmission timing increases
Solution Approach 1:
The patent segments the transmission window into distinct sub-frames, with specific sub-frames allocated for SI-1 transmissions and other sub-frames for other SI transmissions. This segmentation provides clear temporal boundaries that simplify terminal processing, as terminals only need to identify which sub-frame type they need to receive rather than analyzing complex overlapping timing relationships.
Solution Approach 2:
The patent establishes predetermined rules for sub-frame allocation within transmission windows, where specific sub-frames are pre-assigned for SI-1 and other SIs based on their priorities and scheduling requirements. This preliminary configuration of transmission timing rules allows terminals to efficiently determine reception timing without real-time complex calculations.
3Ease of operation
If sub-frames for SI-1 and other SIs are separated in time domain to simplify terminal reception, then ease of operation is improved, but transmission resource flexibility is reduced
Solution Approach 1:
The patent implements a dynamic scheduling mechanism where the allocation of sub-frames within transmission windows can be flexibly adjusted based on traffic conditions, priority requirements, and system load. While maintaining clear sub-frame separation for terminal ease of operation, the system can dynamically reconfigure which sub-frames are assigned to SI-1 versus other SIs, preserving transmission resource flexibility through adaptive resource management.
Data Source
AI summary
A method for transmitting and receiving system information, wherein the method for transmitting the system information includes that a sub-frame used to transmit other system information and a sub-frame used to transmit system information 1 are arranged in different time domain. With the present invention, the influence caused by the re-transmission of the system information 1 on the other system information can be reduced.