Network Node Selection Using Pre-configured Routing Protocols
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Solution Overview
Problem
Current LTE network node selection methods, such as MME, SGW, and PGW, rely on static DNS mappings and multiple DNS queries, leading to latency and load issues, and fail to detect node failures promptly, which is unacceptable in high-speed wireless networks.
Innovation Solution
Implement an integrated control and data plane approach using routing protocols like OSPF, IS-IS, and EIGRP for optimized network node selection, eliminating manual configurations and complex mappings by incorporating load metrics into routing decisions, enabling automatic load balancing and rapid failure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static DNS mappings and multiple DNS queries are used for network node selection, then network node selection can be performed, but latency increases and processing load increases
Solution Approach 1:
The patent pre-establishes mapping relationships between tracking area codes and network nodes, and pre-configures backup node information. When a node fails, the MME can immediately switch to backup nodes without performing DNS queries, thus eliminating DNS query latency while ensuring reliable node selection.
Solution Approach 2:
The patent implements dynamic node selection by maintaining multiple backup network nodes for each primary node. The system dynamically switches from primary to backup nodes based on real-time node status, transforming the static DNS query process into a dynamic failover mechanism that responds immediately to node failures.
2Reliability
If static DNS mappings and multiple DNS queries are used for network node selection, then network node selection can be performed, but processing load on MME and DNS increases
Solution Approach 1:
The patent pre-configures mapping relationships between tracking area codes and network nodes, including backup nodes, before runtime. This eliminates the need for multiple DNS queries during operation, significantly reducing processing load on both the MME and DNS servers while maintaining reliable node selection.
Solution Approach 2:
The patent extracts the node selection logic from the DNS query process and implements it locally in the MME using pre-configured mapping tables. This removes the dependency on repeated DNS queries, reducing processing load on external DNS servers and simplifying the overall system architecture.
3Reliability
If timeout-based failure detection is used, then node failures can be detected, but outage time increases to thirty seconds or more
Solution Approach 1:
The patent pre-configures backup network nodes and their mapping relationships before failures occur. When a primary node fails, the system immediately activates pre-designated backup nodes without waiting for timeout detection, reducing outage time from thirty seconds or more to near-instantaneous failover while maintaining reliable failure detection capability.
Solution Approach 2:
The patent implements dynamic failover by maintaining real-time status monitoring of network nodes and automatically switching to backup nodes upon failure detection. This dynamic response mechanism eliminates the static timeout-based detection delay, enabling rapid recovery while preserving the ability to detect failures.
Data Source
AI summary
A device receives Internet protocol (IP) addresses and metrics associated with network nodes of a network, and stores the IP addresses and the metrics in a route table. The device receives, from a user equipment, a request to connect to the network, and determines a particular network node, of the network nodes, to which to forward a communication session of the user equipment, based on the request and based on the metrics stored in the route table. The device forwards the communication session of the user equipment to the particular network node, and the particular network node enables the user equipment to connect to the network.