Uplink Resource Scheduling via BSR Indication for Low Latency
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Solution Overview
Problem
In LTE systems, the existing resource scheduling method fails to meet the different scheduling requirements of data transmitted on various logical channels, particularly the strict latency requirements of new radio (NR) data in 5G networks, leading to potential delays in obtaining uplink grant resources.
Innovation Solution
The method involves a terminal device sending a buffer status report (BSR) with first indication information to the access network device, allowing it to determine the appropriate scheduling mode for each logical channel, thereby differentially scheduling the uplink grant resource, and the access network device can configure individual reporting for logical channels to reduce latency and network overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station sequentially allocates uplink grant resources according to a first come first service rule, then the scheduling procedure is simple to implement, but the scheduling latency increases and low-latency requirements cannot be met
Solution Approach 1:
The patent changes the scheduling parameter from sequential processing to parallel processing by introducing indication information that identifies multiple logical channels. The base station processes multiple BSRs simultaneously based on their priority levels and latency requirements, rather than handling them one by one in arrival order. This parameter change enables the system to meet low-latency requirements while maintaining implementation simplicity.
Solution Approach 2:
The patent segments the scheduling process by dividing uplink data into different logical channels with distinct priority levels and latency requirements. Each logical channel is handled according to its specific requirements, allowing the base station to prioritize time-sensitive data while maintaining overall system efficiency. This segmentation resolves the contradiction by enabling differentiated treatment of different data types.
2Adaptability or versatility
If the base station uses a unified scheduling method for all logical channels, then the scheduling algorithm is simple, but it cannot meet the different scheduling requirements of data on various logical channels
Solution Approach 1:
The patent applies local quality by assigning different scheduling characteristics to different logical channels based on their specific requirements. Each logical channel receives customized scheduling treatment (e.g., different priority levels, different latency tolerances) while the overall scheduling framework remains unified. The indication information in BSRs enables the base station to apply appropriate local quality adjustments without requiring a completely complex distributed scheduling system.
3Reliability
If the base station allocates sufficient uplink transmission resources to high-priority data, then the latency requirement is met, but the network overhead increases
Solution Approach 1:
The patent applies partial action by allocating uplink grant resources selectively based on the priority and latency requirements of each logical channel. Instead of always allocating maximum resources to high-priority data, the base station allocates just enough resources to meet the specific latency requirements. The indication information enables precise resource allocation, avoiding excessive resource allocation and reducing network overhead while still fulfilling latency requirements.
Data Source
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AI summary
This application provides a resource scheduling method, an apparatus, and a system, and relates to the field of communications technologies, to meet scheduling requirements of data transmitted on different logical channels. The method includes: sending, by a terminal device, a BSR to an access network device, where the BSR carries first indication information, and the first indication information is used by the access network device to determine a scheduling mode corresponding to a first logical channel; receiving, by the terminal device, a first uplink grant resource sent by the access network device, where the first uplink grant resource is scheduled by the access network device based on the BSR in the scheduling mode; and sending, by the terminal device, to-be-sent data on the first logical channel to the access network device by using the first uplink grant resource.