System Information Scheduling via MIB and EPDCCH
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Solution Overview
Problem
In existing communication systems, the overhead of control instructions for scheduling system information using the Physical Downlink Control Channel (PDCCH) is significant, leading to inefficiencies and potential waste, particularly when transmitting system information blocks (SIBs) in LTE/LTE-Advanced systems.
Innovation Solution
A method and apparatus for system information scheduling that reduces the extra overhead of control instructions by using the Master Information Block (MIB) and Downlink Control Information (DCI) to determine and transmit scheduling information for the Physical Downlink Shared Channel (PDSCH), allowing for more efficient resource allocation and reduced PDCCH usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH is used to schedule SIB on PDSCH, then system information can be transmitted, but control instruction overhead is large and causes waste
Solution Approach 1:
The patent combines the scheduling information for SIB with the MIB structure itself. Instead of using separate PDCCH control instructions to schedule SIB transmission, the MIB contains embedded fields that directly provide the scheduling information (subframe number, resource block allocation, modulation and coding scheme), thereby merging the scheduling function into the MIB and eliminating redundant control overhead.
Solution Approach 2:
The MIB is designed to serve multiple functions: it not only provides basic system information but also incorporates scheduling information for SIB transmission. This multi-functional design allows the MIB to replace the need for separate control channels, reducing overall system complexity while maintaining reliable SIB transmission capability.
2Productivity
If PDCCH is used to schedule PDSCH for system information, then scheduling control is achieved, but extra overhead is introduced
Solution Approach 1:
The patent extracts the scheduling control function from the separate PDCCH channel and integrates it into the MIB structure. By taking out the scheduling information requirement and embedding it within the MIB, the system eliminates the need for additional control instructions, thereby reducing overhead while maintaining scheduling efficiency.
Solution Approach 2:
The scheduling information is prepared in advance within the MIB structure before SIB transmission occurs. The MIB contains pre-configured fields that specify the PDSCH scheduling parameters, allowing the terminal to prepare and configure the SIB reception without requiring real-time control instructions from PDCCH, thus reducing control overhead.
3Quantity of substance
If maximum time-frequency resource is allocated for PDSCH, then system information can be transmitted across total downlink bandwidth, but control instruction waste occurs
Solution Approach 1:
The patent applies local quality by providing scheduling information at the appropriate granularity within the MIB structure. Instead of requiring control instructions for the entire maximum time-frequency resource, the MIB contains specific fields that provide localized scheduling information for the actual SIB transmission resources needed, thereby reducing control instruction waste while maintaining the ability to utilize maximum bandwidth when necessary.
Data Source
AI summary
The present invention provides a information processing method at a terminal or a base station. The method at the terminal includes: receiving scheduling information of a physical downlink shared channel (PDSCH) carrying system information, the scheduling information of the PDSCH carried in a master information block (MIB) or downlink control information on an enhanced physical downlink control channel (EPDCCH) sent from the base station, wherein the scheduling information of the PDSCH is used for determining at least one kind of transmission information of the PDSCH; determining the transmission information of the PDSCH according to the scheduling information of the PDSCH. In this way, an extra overhead of a control instruction when a PDCCH is used to schedule a SIB in the prior art is reduced.