Additional PGW-U Routing for Low-Latency Wireless Data Transmission
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Solution Overview
Problem
Existing solutions for low latency communication in wireless networks face challenges such as excessive signaling during PDN connection establishment and deletion, and the assumption that combining SGW-C with PGW-C and SGW-U causes additional network delays and signaling, which impact the ability to provide low latency services.
Innovation Solution
The introduction of an additional PGW-U with uplink classification (UL CL) functionality allows for the selective routing of uplink packets to a local data network, maintaining existing PDN connections, and supporting low latency communication services by adding a new PGW-U when necessary, while utilizing existing IP addresses and performing network address translation when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional PGW-U is allocated for low latency communication service, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the PGW functionality by separating the control plane (PGW-C) from multiple user plane instances (initial PGW-U and additional PGW-U). This allows the system to allocate a dedicated additional PGW-U for low latency services while keeping the control plane centralized, thereby improving service quality without proportionally increasing overall system complexity.
Solution Approach 2:
The additional PGW-U is designed with multi-functionality, serving both as a user plane gateway for low latency services and maintaining compatibility with existing PDN connections. It can handle both breakout traffic and non-breakout traffic, reducing the need for entirely separate infrastructure and mitigating complexity increases.
2Loss of time
If existing PDN connection is maintained without deletion and re-establishment, then signaling overhead is reduced, but connection management complexity increases
Solution Approach 1:
The patent extracts the user plane functionality from the existing PDN connection and introduces an additional PGW-U that handles specific traffic flows (breakout traffic) while the original PDN connection remains intact for other traffic. This allows the system to add low latency capabilities without triggering full connection re-establishment procedures, reducing signaling overhead.
Solution Approach 2:
The additional PGW-U acts as an intermediary component that sits alongside the initial PGW-U, handling specific traffic flows through uplink classification. It mediates between the existing PDN connection infrastructure and the new low latency service requirements, enabling seamless integration without requiring complex connection management changes.
Data Source
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AI summary
Embodiments of the present disclosure provide methods, apparatus and computer program products for data transmission. A method implemented at PGW-C in a wireless network may comprise: determining that an additional user plane of the PGW for a PDN connection needs to be allocated, wherein the PDN connection is used by a user equipment (UE) to connect to a first data network through at least a user plane of a serving gateway (SGW) of the wireless network and an initial user plane of the PGW, and the additional user plane of the PGW is used for connecting with a second data network; selecting the additional user plane of the PGW; sending address information of the additional user plane of the PGW and instruction information to a control plane of the SGW, wherein the user plane of the SGW or the additional user plane of the PGW implements an uplink classifier function to enable a specified part of uplink data in the PDN connection to be forwarded to the second data network through the additional user plane of the PGW.