Packet Control Function Bearer-Specific Information for Wireless Networks
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Solution Overview
Problem
Existing wireless access networks face challenges in efficiently utilizing resources for packet data handling due to limited knowledge about the nature of packet data, leading to suboptimal decision-making and increased latency in call setup times for applications like Push-to-Talk (PTT) and Voice over Internet Protocol (VoIP.
Innovation Solution
The solution involves enabling the Packet Control Function (PCF) to classify incoming packets and add bearer-specific information as an attribute in the payload, allowing the wireless access network to prioritize and manage packet data effectively using Generic Routing Encapsulation (GRE) protocol, enabling the use of Short Data Burst (SDB) for high-priority signaling and optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the wireless access network uses traditional packet data handling methods, then the system maintains simplicity in operation, but the call setup time increases and resource utilization decreases
Solution Approach 1:
The patent applies preliminary action by having the PDSN classify packet data and add bearer-specific information attributes to GRE frames before forwarding to the PCF. This pre-processing enables the PCF to immediately identify high-priority data without complex analysis, reducing call setup time while maintaining manageable system complexity.
Solution Approach 2:
The patent introduces an intermediary mechanism by using bearer-specific information attributes as mediators between the PDSN and PCF. These attributes act as signals that convey packet data characteristics without requiring complex direct analysis, enabling efficient priority handling through a standardized intermediary layer.
2Productivity
If the wireless access network implements intelligent packet classification and prioritization, then resource utilization improves and QoS is enhanced, but the system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the packet processing function into distinct segments: the PDSN performs classification and attribute addition, while the PCF performs priority-based routing decisions. This segmentation allows each component to specialize in specific tasks, improving overall resource utilization while distributing complexity across multiple elements rather than concentrating it in one complex processor.
Solution Approach 2:
The patent implements parameter changes by introducing bearer-specific information attributes that encode packet data characteristics in a standardized format. This parameter-based approach allows the system to handle diverse packet types through uniform parameter interpretation, improving resource utilization through intelligent prioritization while avoiding the complexity of custom processing logic for each packet type.
3Adaptability or versatility
If the system uses standard GRE encapsulation without bearer-specific information, then the protocol remains simple and widely compatible, but the ability to prioritize packet data is limited
Solution Approach 1:
The patent applies universality by designing bearer-specific information attributes that can represent multiple packet data characteristics (priority, QoS requirements, application type) within a single standardized framework. This multi-functional attribute structure enables the system to handle diverse prioritization needs using one universal mechanism, enhancing adaptability without proportionally increasing complexity.
Solution Approach 2:
The patent implements the nested doll principle by embedding bearer-specific information attributes within the existing GRE frame structure. The attributes are nested inside the GRE payload, allowing the extended functionality to be contained within the standard protocol framework. This nesting approach enables enhanced prioritization capability while maintaining compatibility with existing GRE processing infrastructure.
Data Source
AI summary
The Packet Control Function (PCF) has limited knowledge about the nature of the packet data arriving on a bearer path connected via the Packet Data Serving Node (PDSN), and cannot make an intelligent decision on its own as to how best to handle the packet data. Thus, the PDSN provides bearer-specific information by classifying the priority of received packet data; encapsulating the packet data within the payload of a Generic Routing Encapsulation (GRE) frame; and for high priority packet data i) setting a protocol type field in the header of the GRE frame indicating said packet includes an attribute field; and ii) adding an attribute field to the payload of the GRE packet which provides an indication of said high priority data. Furthermore, the PCF can send an A-11 request to the PDSN indicating the features that the PCF is requesting the PDSN enable. For example, for a short data indication, the PCF would request the PDSN enable adding the attribute field to the GRE frame when an Short Data Burst (SDB) is suitable.