Logical-Channel Scheduling Requests for 5G Uplink Prioritization
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Solution Overview
Problem
Existing wireless cellular networks, particularly in 5G, struggle to satisfy diverse scheduling requirements for different service types due to limited scheduling request procedures, which are inadequate for ultra-reliable and low latency communications (URLLC) scenarios.
Innovation Solution
A method and device that enable a terminal device to send scheduling requests based on logical channels, allowing the access network device to allocate uplink resources appropriately based on the service type of the logical channel, using configuration information to manage SR parameters and resource usage numerology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal device uses a single SR procedure for uplink scheduling, then the system is simple to operate, but it cannot satisfy diversified scheduling requirements for different service types
Solution Approach 1:
The patent segments the single SR procedure into multiple independent SR procedures, each associated with a specific logical channel. This allows different service types (e.g., URLLC, eMBB) to have dedicated SR procedures with customized parameters, thereby satisfying diversified scheduling requirements while maintaining operational simplicity through clear separation of concerns
2Adaptability or versatility
If multiple SR configurations are supported for different logical channels, then diversified service requirements can be satisfied, but the device complexity increases
Solution Approach 1:
The patent applies local quality by configuring SR parameters specifically tailored to each logical channel's service requirements. Each logical channel receives customized SR configurations (period, resource allocation, priority) matching its local needs, rather than applying a uniform configuration across all channels, thereby achieving high adaptability without excessive overall complexity
3Productivity
If uplink resources are allocated without logical channel-based SR, then resource allocation is straightforward, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements feedback mechanisms where the terminal device reports logical channel state information (LCSI) along with SR transmissions. This feedback enables the access network device to make informed resource allocation decisions based on actual channel conditions and service requirements, thereby improving resource utilization efficiency through data-driven allocation rather than static or blind allocation
Data Source
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AI summary
Embodiments of the present invention disclose a scheduling request sending method, a scheduling request processing method, and a related device. The scheduling request sending method includes: determining whether there has a first scheduling resource configuration corresponding to the first logical channel according to first indication information, when the first logical channel of a terminal device has to-be sent data and a first scheduling request SR is triggered; where the first indication information includes a first mapping relationship which indicates a correspondence between a logical channel of the terminal device and a scheduling resource configuration, and the first scheduling resource configuration includes a first uplink control channel resource corresponding to the first logical channel; and sending the first SR to an access network device by the first uplink control channel resource, when the first logical channel has a corresponding first scheduling resource configuration. According to the embodiments of the present invention, a scheduling request can be sent to the access network device based on a logical channel, so that the access network device properly allocates an uplink resource to the logical channel based on a service type of the logical channel.