Logical Channel Bandwidth Sharing for Low-Latency Uplink Traffic
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently balancing latency and uplink capacity for delay-sensitive traffic, particularly for extended reality (XR) traffic, due to traditional LCH prioritization methods that result in inefficient bandwidth allocation and utilization.
Innovation Solution
Implementing dynamic bandwidth allocation and prioritization for logical channels (LCHs) through shared bandwidth allocation and LCH upgrades, using leaky bucket regulators and sliding windows to dynamically adjust bandwidth usage and prioritize data transmission based on priority, thereby optimizing latency and capacity utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional LCH prioritization methods are used, then simple channel management is maintained, but bandwidth allocation efficiency and latency performance deteriorate
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the shared bandwidth is dynamically adjusted based on actual traffic conditions and LCH priorities. The system transitions from static to dynamic resource management, allowing the shared bandwidth to vary over time according to demand, thereby improving allocation efficiency while maintaining manageable complexity through automated control mechanisms.
Solution Approach 2:
The system changes the bandwidth parameter dynamically based on priority levels and traffic conditions. By adjusting bandwidth allocation parameters in response to real-time conditions rather than using fixed allocations, the system achieves more efficient bandwidth utilization and better latency performance for delay-sensitive traffic.
2Productivity
If fixed bandwidth allocation is used for each LCH, then allocation simplicity is maintained, but bandwidth utilization efficiency deteriorates
Solution Approach 1:
The patent replaces fixed bandwidth allocation with dynamic allocation where the shared bandwidth is continuously adjusted based on actual traffic conditions. This dynamic mechanism allows the system to allocate bandwidth more efficiently by responding to real-time demand patterns, avoiding both over-allocation and under-utilization that occur with fixed assignments.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor actual bandwidth usage and traffic conditions, then adjust the shared bandwidth allocation accordingly. This feedback loop enables continuous optimization of bandwidth utilization efficiency while keeping the allocation mechanism manageable through automated control based on observed performance metrics.
3Loss of time
If aggressive prioritization is applied to high-priority LCHs, then latency requirements are met, but capacity for other traffic types deteriorates
Solution Approach 1:
The patent implements dynamic prioritization where the degree of prioritization is adjusted based on current traffic conditions and shared bandwidth availability. Rather than maintaining constantly aggressive prioritization, the system dynamically modulates priority treatment to meet latency requirements when necessary while preserving capacity for other traffic types when conditions permit, achieving a balance between latency performance and overall capacity utilization.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration indicating a shared bandwidth allocation. The UE may receive an uplink grant that indicates an uplink resource allocation. The UE may transmit data associated with a logical channel (LCH) in the uplink resource allocation, wherein the data associated with the LCH that is transmitted in the uplink resource allocation occupies at least a portion of the shared bandwidth allocation. Numerous other aspects are described.