Local Breakout Session Setup in Wireless Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless communication systems inefficiently route local data traffic through operator networks, leading to increased traffic load and propagation delay, as they do not differentiate between local and general data traffic.
Innovation Solution
A local breakout session establishment method and apparatus that selects a Home eNB with integrated PGW and SGW functions to assign IP addresses and route data locally, bypassing the need for data to pass through the operator's network by using a Mobility Management Entity to select the HeNB PGW and configure radio bearers for direct IP network access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data traffic is routed through the operator's network (GGSN) using GTP tunneling, then centralized network control is maintained, but traffic load on the operator's network increases significantly and propagation delay increases
Solution Approach 1:
The patent segments data traffic into local traffic and non-local traffic. Local traffic is routed directly through the HeNB to the local IP network, while non-local traffic is routed through the operator's network. This segmentation reduces the traffic load on the operator's network by excluding local traffic from the GTP tunneling path.
Solution Approach 2:
The HeNB acts as an intermediary device that performs local breakout functionality. It receives data from the UE, determines whether the traffic is local or non-local, and routes it accordingly. This intermediary function allows local traffic to bypass the operator's core network while maintaining centralized control for non-local traffic.
2Reliability
If data traffic is routed through the operator's network (GGSN), then centralized policy enforcement is maintained, but transmission latency increases for local traffic
Solution Approach 1:
The patent segments the data path into two routes: a short path for local traffic through the HeNB and a longer path for non-local traffic through the operator's network. This segmentation reduces transmission latency for local traffic by eliminating unnecessary hops through the GGSN and other core network elements.
Solution Approach 2:
The HeNB performs preliminary routing decisions at the edge of the network, determining whether traffic is local before it enters the core network. This preliminary action prevents local traffic from traversing the entire operator's network path, thereby reducing latency.
3Reliability
If IP address assignment is centralized at the PGW, then unified IP management is achieved, but signaling traffic increases for local breakout services
Solution Approach 1:
The patent segments IP address assignment functionality between the PGW and HeNB. The PGW assigns IP addresses for non-local traffic, while the HeNB assigns IP addresses for local traffic. This segmentation reduces signaling traffic by allowing local IP address assignment to occur at the edge without requiring constant communication with the centralized PGW.
Solution Approach 2:
The HeNB performs self-service by autonomously assigning IP addresses to UEs for local breakout services. This self-service capability eliminates the need for signaling to the PGW for each local IP address assignment, thereby reducing signaling traffic while maintaining unified IP management for non-local services.
Data Source
AI summary
A local breakout session establishment method and apparatus in an Evolved Packet System (EPS) is provided for an HeNB to efficiently route local IP packets. A local breakout service method for a wireless communication system including a macro evolved Node B (eNB) and a Home eNB (HeNB) having a Packet Data Network (PDN) gateway (PGW) and a serving gateway (SGW) includes selecting, at a Mobility Management Entity (MME), the PGW of the HeNB and transmitting a Create Default Bearer Request message to the HeNB in response to a local breakout service request message including a local breakout Access Point Name (APN); assigning, at the HeNB, an IP address to a user equipment transmitted the local breakout service request message and transmitting a Create Default Bearer Response message including a Tunnel Endpoint Identifier (TEID) to the MME; transmitting a Bearer Setup Request message including the TEID from the MME to the HeNB; and configuring, at the HeNB, a radio bearer with the user equipment and routing data transmitted by the user equipment through the radio bearer to an Internet Protocol (IP) network by means of the internal PGW.