Policy Enforcement Node Redundant Packet Filter Suppression
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Solution Overview
Problem
In mobile networks, particularly in 3GPP LTE networks, redundant packet filters are often installed on user equipment, leading to unnecessary messaging, usage of limited filter identifiers, and memory wastage, as existing systems lack effective mechanisms to suppress redundant filter installations.
Innovation Solution
A method and system where a policy enforcement node, such as LTE PCEF, installs packet filters on user equipment and determines redundancy by comparing filter rules, allowing it to disregard redundant filter installation instructions received from a policy rules node, thereby conserving resources and avoiding unnecessary installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PCEF installs all packet filters received from the PCRF, then all filtering rules are enforced on the UE, but redundant filters are installed causing unnecessary messaging and memory usage
Solution Approach 1:
The PCEF performs preliminary analysis of incoming filter installation instructions before actually installing filters on the UE. By checking whether a filter is redundant against already installed filters, the system prevents unnecessary filter installations in advance, avoiding wasted memory resources on the UE while ensuring all necessary filtering rules are enforced.
2Reliability
If the PCEF installs all packet filters received from the PCRF, then all filtering rules are enforced on the UE, but unnecessary messaging occurs to install redundant filters
Solution Approach 1:
The PCEF performs preliminary analysis of incoming filter installation instructions before actually installing filters on the UE. By checking whether a filter is redundant against already installed filters, the system prevents unnecessary filter installations in advance, avoiding wasted memory resources on the UE while ensuring all necessary filtering rules are enforced.
3Reliability
If the PCEF installs all packet filters received from the PCRF, then all filtering rules are enforced on the UE, but limited filter identifiers are consumed unnecessarily
Solution Approach 1:
The PCEF performs preliminary analysis of incoming filter installation instructions before actually installing filters on the UE. By checking whether a filter is redundant against already installed filters, the system prevents unnecessary filter installations in advance, avoiding wasted memory resources on the UE while ensuring all necessary filtering rules are enforced.
4Loss of substance
If the PCEF checks for redundancy before installing filters, then redundant filter installations are suppressed, but additional processing is required at the PCEF
Solution Approach 1:
The PCEF autonomously performs the redundancy check using its own installed filter information without requiring external assistance or complex coordination with other network elements. The PCEF compares incoming filter instructions against its local state of already installed filters, making the redundancy detection self-contained and reducing overall system complexity despite the added processing step.
Data Source
AI summary
Methods, systems, and computer readable media for suppressing redundant packet filter installation on user equipment in a mobile network are disclosed. In some examples, a method includes installing a first packet filter on user equipment (UE) for the mobile network. The method includes receiving a filter installation instruction from a policy rules node for the policy enforcement node to install at least a second packet filter on the UE. The method includes determining that the second packet filter is redundant to the first packet filter and, in response to determining that the second packet filter is redundant to the first packet filter, disregarding the filter installation instruction to install the second packet filter on the UE.