Semi-Persistent Scheduling Resource Allocation Verification
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Solution Overview
Problem
In wireless communication systems using Semi-Persistent Scheduling (SPS) for LTE, frequent transmission of control information leads to traffic overload and resource allocation errors due to Cyclic Redundancy Checking (CRC) failures, causing unnecessary waste of transmission resources.
Innovation Solution
A resource allocation method that verifies the validity of semi-persistent transmission resource allocation messages by performing CRC operations and comparing transmission resource information with previously received data, using the resources only when validity is confirmed, and discarding or retransmitting messages when errors occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Semi-Persistent Scheduling is adopted to reduce control information transmission, then traffic overload is reduced, but resource allocation errors occur due to CRC failures
Solution Approach 1:
The patent applies preliminary action by performing validity checks on SPS resource allocation messages before the user terminal commits to using the allocated resources. The base station includes validity indication information in the downlink control information, allowing the user terminal to verify resource allocation validity in advance and avoid wasting transmission resources on erroneous allocations.
Solution Approach 2:
The patent implements feedback by having the base station provide validity indication information about SPS resource allocation messages to the user terminal. This feedback mechanism allows the user terminal to distinguish between valid and invalid resource allocations, preventing unnecessary transmissions on misallocated resources and improving overall resource allocation reliability.
2Measurement precision
If CRC checking is performed to verify resource allocation, then allocation accuracy is improved, but transmission resources are wasted when CRC fails incorrectly
Solution Approach 1:
The patent introduces an intermediary validity indication information element that mediates between the CRC checking mechanism and the resource allocation decision. This intermediary provides additional context about the validity of SPS resource allocation messages, allowing the user terminal to make more informed decisions and avoid wasting transmission resources when CRC fails incorrectly.
Solution Approach 2:
The patent applies preliminary action by providing validity indication information before the user terminal attempts to use allocated resources. This preliminary information allows the terminal to avoid unnecessary transmissions on invalid resources, reducing energy waste while maintaining accurate resource allocation verification.
3Productivity
If SPS resource allocation is used to reduce control signaling, then system efficiency is improved, but resource waste occurs due to misjudged allocations
Solution Approach 1:
The patent implements feedback by including validity indication information in the downlink control information sent to the user terminal. This feedback allows the terminal to verify whether SPS resource allocation messages are valid before committing to transmissions, preventing resource waste while maintaining the efficiency benefits of semi-persistent scheduling.
Solution Approach 2:
The patent applies preliminary action by having the base station indicate the validity of SPS resource allocation messages in advance. This preliminary information enables the user terminal to avoid wasting transmission resources on invalid allocations while still benefiting from the reduced control signaling overhead of semi-persistent scheduling.
Data Source
AI summary
This invention relates to a method for allocating resources in a wireless communication system and a system thereof. The disclosed method comprises steps for: allowing a user's terminal to receive information about the wireless transmission resources among semi-permanent transmission resources; performing CRC-calculation by receiving a message about the allocation of the semi-permanent transmission resources based on the received information; verifying the validity of the message by comparing the information about the wireless resources indicated in the received message with the received information about the wireless transmission resources; and receiving data as the transmission resources indicated in the message if there is no error in the verification.