Joint Scheduling Grant for Multi-Carrier Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE LAA scenarios, the limited control signaling capacity of the primary cell restricts simultaneous scheduling of multiple secondary cells, leading to reduced peak data rate and system throughput due to the need for independent PDCCH transmissions for each carrier.
Innovation Solution
A method that generates a single scheduling grant with an indicator to schedule multiple carriers, allowing devices to recognize and transmit data across multiple carriers efficiently, reducing control signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If independent PDCCH transmissions are used for each carrier, then control signaling accuracy is maintained, but control signaling capacity is exceeded and scheduling efficiency deteriorates
Solution Approach 1:
The patent combines multiple independent PDCCH transmissions into a single joint scheduling grant that can schedule multiple carriers simultaneously. This merging approach consolidates the control signaling overhead, allowing the base station to schedule multiple secondary cells without exceeding the limited control signaling capacity of the primary cell, thereby resolving the contradiction between maintaining control signaling accuracy and improving scheduling efficiency.
2Adaptability or versatility
If multiple independent PDCCHs are transmitted, then each carrier can be scheduled independently, but the control signaling overhead increases significantly
Solution Approach 1:
The patent merges multiple carrier scheduling operations into a single joint scheduling grant that maintains the ability to independently schedule each carrier while significantly reducing control signaling overhead. The joint grant includes carrier-specific resource allocation information for multiple carriers, enabling flexible carrier scheduling without the need for separate PDCCH transmissions for each carrier.
3Productivity
If narrow bandwidth is used for PCell, then frequency resources are optimized, but control signaling capacity is reduced
Solution Approach 1:
The patent enables the base station to schedule multiple carriers using a single joint scheduling grant transmitted on the narrow bandwidth PCell. This approach allows frequency resources to be optimized by using narrow bandwidth for control signaling while still achieving high scheduling capacity through the joint grant mechanism that can allocate resources across multiple wider bandwidth carriers.
Data Source
Figure 1~2
Figure 3a~3b
Figure 4~5
AI summary
The subject matter described herein relates to scheduling enhancement in wireless communication. A scheduling grant including an indicator can be generated, for example, at the base station (BS). The indicator included in the scheduling grant identifies multiple carriers to be scheduled with the scheduling grant. Upon receiving the scheduling grant, a device, for example, UE can recognize the multiple carriers scheduled with the single scheduling grant, and can detect corresponding data transmission in the multiple carriers accordingly. Compared with scheduling each carrier with independent scheduling grant, the proposed solution saves control signaling overhead, and thereby alleviates the problems caused by control signaling capacity limitation, and increase peak data rate and system throughput.