NR-XR Logical Channel Mapping for Conditional Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources for XR applications, particularly in managing logical channel prioritization and transmission resources to meet the varying quality of service requirements for different data flows.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to receive configuration information for logical channel prioritization, determine transmission resources based on time-based or priority-based conditions, and transmit protocol data units (PDUs) using these resources, while also managing resource usage indications and default mapping limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic LCP mapping indications are implemented to flexibly allocate transmission resources based on time-based or priority-based conditions, then resource allocation efficiency and QoS satisfaction for XR data flows are improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent implements dynamic LCP mapping indications that allow the network to flexibly adjust logical channel to transmission resource mappings based on real-time conditions. The network can dynamically change which logical channels map to which transmission resources (e.g., PUSCH occasions) depending on time-based conditions (such as delay budgets) or priority-based conditions (such as PDU set importance), enabling adaptive resource allocation that responds to varying XR traffic requirements without requiring static pre-configuration for all scenarios
Solution Approach 2:
The patent changes the mapping parameters between logical channels and transmission resources dynamically. By modifying LCP mapping indications, the system alters which logical channels are assigned to specific transmission resources based on current network conditions, data flow priorities, and QoS requirements. This parameter change approach allows the same transmission resources to be optimally allocated to different logical channels at different times, improving overall resource utilization efficiency
2Reliability
If multiple transmission resources are allocated to meet diverse QoS requirements of different data flows, then QoS satisfaction is improved, but resource management complexity increases
Solution Approach 1:
The patent segments transmission resources into multiple distinct transmission resources (e.g., different PUSCH occasions, different logical channels) that can be independently allocated to different data flows. Each transmission resource can be configured with specific characteristics suitable for different QoS requirements, allowing the system to divide and conquer the resource allocation problem by handling different data flows through dedicated resource segments rather than managing a monolithic resource pool
Solution Approach 2:
The patent applies local quality by configuring different transmission resources with different properties and characteristics tailored to specific QoS requirements. For example, certain transmission resources may be configured with tighter timing requirements for delay-sensitive XR data flows, while others may have more relaxed configurations. The LCP mapping indications enable specific logical channels to be mapped to transmission resources with locally optimized qualities that match the specific QoS needs of each data flow
3Productivity
If conditional LCP mapping is used to optimize transmission resource selection, then transmission efficiency is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple LCP mapping indications with different time-based or priority-based conditions before actual data transmission. The network prepares conditional mapping rules in advance, specifying under what conditions (e.g., if delay budget is exceeded, if PDU importance changes) certain logical channels should map to specific transmission resources. When data transmission is needed, the WTRU simply evaluates the pre-configured conditions and applies the appropriate pre-determined mapping, avoiding the need to compute optimal mappings in real-time
Data Source
AI summary
Systems, methods, devices, and instrumentalities are described herein related to NR-XR resource allocation. A device (e.g., a wireless transmit/receive unit (WTRU)) may receive configuration information. The configuration information may indicate a logical channel prioritization (LCP) mapping indication. The LCP mapping indication may include one or more of a time-based condition or a priority-based condition. The WTRU may receive an indication of a data flow. The data flow may be mapped to a first logical channel. A protocol data unit (PDU) may be associated with the data flow. The WTRU may determine a transmission resource to use for transmission of the PDU. The determination of the transmission resource may be based on a condition being satisfied. The determined transmission resource may be associated with a second logical channel. A WTRU may transmit the PDU via the determined transmission resource that is associated with the second logical channel.