Logical Channel Prioritization for Jitter-Sensitive Traffic
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Solution Overview
Problem
Wireless communication systems face challenges in managing finite resources effectively due to signal attenuation and blockages in complex environments, leading to issues with packet delay inconsistency and packet loss, particularly affecting real-time communications like IP telephony and video conferencing.
Innovation Solution
The method enhances logical channel prioritization by considering relative packet transmission delay bounds, allowing user equipment to dynamically allocate uplink resources based on jitter-sensitive traffic, using a modified token bucket procedure and machine learning algorithms to adjust prioritization rules and parameters for improved resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional logical channel prioritization is used, then simple resource allocation is maintained, but packet delay consistency and reliability deteriorate for jitter-sensitive traffic
Solution Approach 1:
The patent modifies the token bucket procedure by introducing packet delay bounds as a new parameter for logical channel prioritization. Instead of using only traditional parameters like priority level and bucket depth, the system now incorporates delay bound information to dynamically adjust resource allocation decisions, enabling better service for jitter-sensitive traffic while maintaining manageable system complexity
Solution Approach 2:
The patent implements dynamic logical channel prioritization where the token bucket parameters and priority levels are not fixed but can be adjusted based on current network conditions and packet delay requirements. This dynamic adaptation allows the system to respond to changing traffic patterns and maintain optimal packet delivery consistency without requiring overly complex static configurations
2Loss of time
If uplink resources are allocated without considering packet delay bounds, then allocation simplicity is maintained, but network latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring packet delay bounds and token bucket parameters for different logical channels before resource allocation is needed. This allows the UE to make informed allocation decisions quickly without complex real-time calculations, reducing network latency while keeping the allocation process manageable through pre-established rules
3Reliability
If traditional token bucket procedure is used without delay bounds, then ease of implementation is maintained, but packet loss increases for jitter-sensitive traffic
Solution Approach 1:
The patent incorporates feedback mechanisms where the UE monitors packet delay experience and uses this information to adjust logical channel prioritization decisions. The feedback loop allows the system to learn from actual packet transmission performance and refine its allocation strategy, reducing packet loss for jitter-sensitive traffic while maintaining implementation feasibility through iterative improvement rather than overly complex centralized control
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communications by a user equipment (UE), comprising receiving, from a network entity, an uplink grant indicating uplink resources, allocating the uplink resources to one or more logical channels (LCHs) based on a procedure that takes into account relative packet transmission delay bounds for at least a first LCH of the LCHs, and transmitting, to the network entity, traffic for the LCHs on the uplink resources in accordance with the allocation.