EPS Bearer Attention Indicator for LTE Congestion Control
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Solution Overview
Problem
Wireless communication networks, particularly LTE networks, face congestion issues due to varying service demands, leading to insufficient throughput and latency problems during peak periods, which negatively impact user experience despite the presence of Quality of Service (QoS) architectures.
Innovation Solution
The implementation of an Evolved Packet System (EPS) bearer with an attention indicator in the EPS bearer setup message, which differentiates between attended and unattended traffic, allowing for dynamic resource allocation and prioritization to manage congestion by delaying unattended traffic during peak conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS architecture is implemented to prioritize traffic, then service differentiation is improved, but network congestion is not fully resolved during peak demand periods
Solution Approach 1:
The patent segments traffic into attended and unattended categories using an attention indicator. This segmentation allows the network to differentiate and prioritize attended traffic (real-time services) separately from unattended traffic (best-effort services), resolving the contradiction by enabling fine-grained traffic management that maintains service differentiation while improving overall network productivity during congestion.
Solution Approach 2:
The patent introduces an attention indicator parameter that changes the state of traffic classification. By adding this new parameter to existing QoS mechanisms, the system can dynamically adjust priority levels based on whether traffic is attended or unattended, thereby improving both service differentiation and network throughput without requiring complete system redesign.
2Loss of time
If network resources are allocated to meet latency demands, then real-time service quality is improved, but available throughput for other services deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the attention indicator enables real-time adjustment of priority levels. During congestion, attended traffic (requiring low latency) receives dynamic priority boosting, while unattended traffic is dynamically deprioritized. This dynamic mechanism resolves the contradiction by allowing the system to adapt resource allocation based on current traffic conditions and service requirements.
Solution Approach 2:
The attention indicator is established in advance during EPS bearer setup, allowing the network to pre-classify traffic before congestion occurs. This preliminary classification enables proactive resource allocation decisions, ensuring that when congestion happens, the system can immediately prioritize attended traffic without needing to make reactive decisions, thus maintaining low latency while preserving throughput for unattended services.
3Reliability
If traffic prioritization is implemented, then attended service quality is improved, but unattended service performance deteriorates
Solution Approach 1:
The patent applies local quality by treating attended and unattended traffic differently based on their specific requirements. Attended traffic receives enhanced priority handling with guaranteed quality attributes, while unattended traffic is handled with best-effort service. This localized differentiation resolves the contradiction by ensuring that priority mechanisms improve attended service quality without unnecessarily impacting unattended services that don't require high priority handling.
Data Source
AI summary
Embodiments of an Evolved Node-B (eNB) to support packet-switched (PS) services according to EPS bearers are disclosed herein. The eNB may receive an EPS bearer setup message from an MME for an establishment of an EPS bearer for a PS service between a User Equipment (UE) and a PGW. The EPS bearer setup message may include an attention indicator for the PS service that indicates whether traffic for the PS service is attended or unattended at the UE. The eNB may further transmit traffic packets to and receive traffic packets from the UE 102 as part of the PS service. In addition, the eNB may use the attention indicator as part of congestion control in the network.