Non-Anchor Carrier SIB Reception via Anchor Subframe Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In a time division duplex (TDD) scenario, the limited quantity of downlink subframes on an anchor carrier poses a challenge, leading to terminal devices incorrectly receiving system information blocks (SIBs) on non-anchor carriers due to unknown valid subframe configurations, resulting in operational failures.
Innovation Solution
A method to determine valid subframes on non-anchor carriers by correlating them with valid subframes on anchor carriers, allowing terminal devices to accurately receive SIBs without introducing new signaling, thereby ensuring normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If another SIB is sent on a non-anchor carrier to resolve resource configuration problems, then spectrum utilization is improved, but the terminal device cannot correctly receive the SIB due to unknown valid subframe configuration
Solution Approach 1:
The patent uses the valid subframe configuration of the anchor carrier as an intermediary reference to determine the valid subframe configuration of the non-anchor carrier. By establishing a correspondence relationship between the two carriers' subframe configurations, the terminal device can indirectly obtain the valid subframe information of the non-anchor carrier through the anchor carrier's known configuration, thus solving the problem of unknown valid subframes while maintaining reliable SIB reception
Solution Approach 2:
The anchor carrier's valid subframe configuration serves multiple functions: it not only ensures proper operation on the anchor carrier itself but also acts as a reference for determining the valid subframe configuration of the non-anchor carrier. This multi-functional use of the anchor carrier configuration improves spectrum utilization by enabling reliable SIB transmission on additional carriers without requiring separate configuration signaling
2Reliability
If new signaling is introduced to indicate valid subframe configuration on non-anchor carrier, then SIB reception reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent enables the terminal device to self-determine the valid subframe configuration of the non-anchor carrier by using its own knowledge of the anchor carrier's configuration and the established correspondence relationship. This self-service approach eliminates the need for additional network signaling to convey valid subframe information, thereby maintaining reliable SIB reception while avoiding increased signaling overhead
Solution Approach 2:
The terminal device performs preliminary determination of the non-anchor carrier's valid subframe configuration by leveraging the pre-known anchor carrier configuration and the predefined correspondence relationship. This preliminary action allows the terminal to be prepared to correctly receive SIBs on the non-anchor carrier without requiring real-time signaling指示, thus improving reliability while minimizing signaling overhead
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
This application provides a communications method and apparatus, and a computer-readable storage medium. The communications method includes: determining a valid subframe and an invalid subframe on an anchor carrier; determining at least one valid subframe on a non-anchor carrier based on the valid subframe and the invalid subframe on the anchor carrier; and receiving another system information block SIB in the at least one valid subframe on the non-anchor carrier. Because a terminal device receives the another SIB in the at least one valid subframe on the non-anchor carrier, it can be ensured that the terminal device correctly receives the another SIB, thereby ensuring that the terminal device can normally work in a TDD scenario. In addition, the terminal device can determine the at least one valid subframe on the non-anchor carrier without introducing new signaling, thereby reducing signaling overheads.