Uplink Grant Transmission Characteristic Mapping for Logical Channel Group Scheduling
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Solution Overview
Problem
In wireless communication systems, existing scheduling mechanisms fail to meet differentiated service requirements for different logical channels within a terminal device, as all logical channel groups share the same uplink transmission resource, leading to unsatisfied latency and other service requirements.
Innovation Solution
The proposed solution involves using an uplink grant that indicates both the uplink transmission resource and transmission characteristic information, allowing each logical channel group to be mapped to specific transmission characteristics, ensuring that only matching logical channels transmit their buffer status reports on the allocated resource, thereby enabling differentiated scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all logical channel groups share the same uplink transmission resource, then resource allocation is simple, but differentiated service requirements cannot be met
Solution Approach 1:
The patent segments logical channel groups by introducing a mapping relationship between logical channel groups and transmission characteristics. Each logical channel group is associated with specific transmission characteristics (such as latency requirements, reliability requirements), and the network device segments uplink resources into multiple transmission resources corresponding to different transmission characteristics. This allows differentiated scheduling without requiring complete redesign of the scheduling mechanism.
Solution Approach 2:
The patent applies local quality by assigning different transmission characteristics to different logical channel groups. Instead of uniform treatment, each logical channel group can have its own transmission characteristic requirements (e.g., some groups require low latency, others require high reliability). The network device then allocates specific uplink transmission resources matching these local requirements, ensuring that each logical channel group receives appropriate service quality.
2Loss of time
If BSRs of all logical channel groups are transmitted on the current available uplink transmission resource, then transmission resource usage is simplified, but latency requirements of some services cannot be met
Solution Approach 1:
The patent segments BSR transmission by introducing transmission characteristic-based resource allocation. Instead of all BSRs being transmitted on a single available uplink resource, the patent segments BSR transmission into multiple paths based on the transmission characteristics of the corresponding logical channel groups. Each BSR is transmitted on an uplink transmission resource that matches its latency and reliability requirements.
Solution Approach 2:
The patent applies preliminary action by pre-establishing the mapping relationship between logical channel groups and transmission characteristics, and between transmission characteristics and uplink transmission resources. Before actual data transmission occurs, the network device configures multiple uplink transmission resources with different transmission characteristics and establishes the mapping rules. When BSR transmission is needed, the terminal device can directly select the appropriate resource based on the pre-configured mapping, avoiding latency.
3Adaptability or versatility
If a single uplink transmission resource is used for all logical channels, then resource management is simplified, but differentiated scheduling of different services cannot be implemented
Solution Approach 1:
The patent applies universality by designing uplink transmission resources that can serve multiple purposes. Each uplink transmission resource is configured with specific transmission characteristics (latency, reliability, bandwidth), allowing the same resource pool to satisfy different service requirements. The network device can dynamically allocate appropriate resources based on service needs, making the resource system universally applicable to various service types without requiring completely separate resource sets.
Data Source
AI summary
This application provides a communication method and a device. The communication method includes: receiving a UL grant from a network device, where the UL grant is used to indicate an uplink transmission resource and transmission characteristic information; determining a first logical channel group, where each logical channel in the first logical channel group is mapped to one or more pieces of transmission characteristic information, and transmission characteristic information to which at least one logical channel in the first logical channel group is mapped matches the transmission characteristic information indicated by the UL grant; and sending a BSR of the first logical channel group to the network device by using the uplink transmission resource.