EPC Access Gateway for WLAN Device Reuse
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Solution Overview
Problem
Existing WLAN systems face high upgrade costs when user equipment (UE) accesses an evolved packet core (EPC) due to the need for integrated DHCP, authenticator, and EPC access functions, which current devices do not support, hindering the reuse of existing devices.
Innovation Solution
An EPC access gateway with DHCP and EPC access processing capabilities is introduced, allowing the existing WLAN authenticator to perform EPC access without upgrades, using a Trusted Gateway (TGW) that aggregates data and separates the WLAN from the EPC, reducing management complexity and security risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the WLAN authenticator device is upgraded to integrate DHCP server function and EPC access function, then the UE can access EPC through WLAN, but the upgrade cost of the WLAN system increases significantly
Solution Approach 1:
The patent segments the EPC access function from the WLAN authenticator device and places it in a separate network element (EPC access gateway). This allows the existing WLAN authenticator to remain unchanged while still enabling EPC access through the segregated gateway that handles DHCP requests and EPC access procedures independently.
Solution Approach 2:
The patent introduces an intermediary EPC access gateway that mediates between the WLAN authenticator and the EPC network. This gateway receives DHCP requests from UEs, obtains subscription data, and performs EPC access processing, thereby enabling EPC access without modifying the existing WLAN authenticator device.
2Adaptability or versatility
If the WLAN authenticator integrates multiple functions (DHCP, EPC access), then UE can access EPC, but the device complexity increases
Solution Approach 1:
The patent divides the complex multi-functional system into separate functional modules: the WLAN authenticator handles authentication, while the EPC access gateway handles DHCP and EPC access. This segmentation reduces the complexity of each individual device while maintaining overall system convergence capability.
Solution Approach 2:
The patent extracts the EPC access function and DHCP server function from the WLAN authenticator device and places them in a separate EPC access gateway. This extraction reduces the processing capability requirements of the WLAN authenticator while preserving the convergence functionality through the dedicated gateway.
3Ease of manufacture
If existing WLAN devices are reused without upgrade, then upgrade cost is reduced, but the devices cannot support EPC access function
Solution Approach 1:
The patent introduces an EPC access gateway as an intermediary that enables existing WLAN devices to access EPC without modification. The gateway translates and processes DHCP requests from UEs, obtaining subscription data and performing EPC access procedures, thereby bridging the capability gap between legacy WLAN devices and EPC requirements.
Solution Approach 2:
The EPC access gateway serves multiple functions: it acts as a DHCP server, subscription data repository, and EPC access controller. This multi-functional gateway provides EPC access support for various WLAN devices without requiring them to be upgraded, achieving universal compatibility.
Data Source
AI summary
A method for a user equipment (UE) to access an evolved packet core (EPC) network includes: receiving, by an EPC access gateway connecting a wireless local area network (WLAN) to an EPC, a Dynamic Host Configuration Protocol (DHCP) request from the UE; and obtaining, by the EPC access gateway, subscription data of the UE according to a media access control MAC address of the UE in the DHCP request, and performing EPC access processing for the UE according to the obtained subscription data, where the obtaining subscription data of the UE according to a MAC address of the UE includes: obtaining the subscription data of the UE according to (a) the MAC address of the UE and (b) a matching MAC address of the UE the subscription data of the UE that are correspondingly stored by a network device in an access authentication process.