BNG DHCP Server for 5G IP Management
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Solution Overview
Problem
Current configurations in 5G networks require significant overhead and resource wastage due to the need for multiple encapsulations and decapsulations of DHCP control packets, which are not efficiently supported by the 5G control plane, leading to inefficiencies in IP address management and network resource allocation.
Innovation Solution
A broadband network gateway (BNG) is configured to act as a DHCP server, receiving DHCP discover requests from customer premises equipment (CPE), communicating with a fixed mobile interworking function (FMIF), and providing DHCP offers, requests, and acknowledgments to manage IP addresses and network parameters efficiently, thereby reducing the need for multiple encapsulations and decapsulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DHCP control packets are transmitted through multiple encapsulations and decapsulations in the 5G control plane, then IP address management can be performed, but significant overhead and resource wastage occur
Solution Approach 1:
The patent extracts the DHCP server functionality from the 5G control plane and relocates it to the access network device. This removes the inefficient multiple encapsulation and decapsulation processes from the control plane while retaining IP address management capabilities in the access network, thereby eliminating the resource wastage associated with DHCP packet handling in the core network.
Solution Approach 2:
The access network device acts as an intermediary by implementing a local DHCP server that mediates between the CPE and the IP address management system. This intermediary approach allows DHCP requests to be handled locally without requiring transmission through multiple network layers, reducing overhead while maintaining full IP address management functionality.
2Adaptability or versatility
If multiple encapsulations and decapsulations are performed for DHCP packets, then 5G control plane protocols can be applied, but the number of packets transmitted increases significantly
Solution Approach 1:
The patent extracts DHCP packet processing from the 5G control plane protocol stack and implements it directly in the access network device. This eliminates the need for multiple encapsulation and decapsulation operations that would otherwise be required to handle DHCP packets through the core network, significantly reducing the quantity of packets transmitted.
Solution Approach 2:
The access network device provides self-service by implementing a local DHCP server that handles DHCP requests autonomously. This self-service capability allows the device to manage IP address allocation locally without requiring interaction with the 5G control plane for DHCP operations, thereby reducing packet transmission while maintaining protocol compatibility.
3Extent of automation
If DHCP server functionality is implemented in the 5G control plane, then centralized IP management is achieved, but computing and networking resources are wasted
Solution Approach 1:
The patent segments the IP address management functionality by separating the DHCP server implementation from the 5G control plane and placing it in the access network device. This segmentation allows centralized management policies to be maintained while executing DHCP operations locally, thereby achieving automated IP management without the computing resource wastage of running DHCP services in the core network.
Solution Approach 2:
The access network device serves as an intermediary that implements the DHCP server locally, mediating between CPE devices and the IP address management system. This intermediary approach maintains the benefits of centralized IP management through policy coordination while eliminating the need for computationally expensive DHCP packet processing in the core network, thus reducing computing resource wastage.
Data Source
AI summary
In some implementations, a broadband network gateway (BNG) may receive, from a customer premises equipment, a dynamic host configuration protocol (DHCP) discover request, wherein the BNG is connected to the customer premises equipment and a fixed mobile interworking function (FMIF). The BNG may communicate with, based on the DHCP discover request, the FMIF. The BNG may provide to the customer premises equipment, and based on communicating with the FMIF, a DHCP offer that offers utilization of the BNG as a DHCP server. The BNG may receive from the customer premises equipment, and based on providing the DHCP offer, a DHCP request to request utilization of the BNG as the DHCP server. The BNG may provide to the customer premises equipment, and based on the DHCP request, a DHCP acknowledgment that acknowledges utilization of the BNG as the DHCP server.