PDN Address Capability Notification for UE IP Management
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Solution Overview
Problem
In wireless broadband communication networks, especially in Release-8 GPRS/UMTS and EPS systems, there is a challenge in managing IP address allocation efficiently, leading to resource waste and service interruptions when User Equipment (UE) attempts to acquire additional IP addresses beyond what the network supports, resulting in UE failing to obtain new IP addresses for PDN connections.
Innovation Solution
The method involves determining and communicating the PDN address capability to the UE, which includes the available IP address versions and quantities, allowing the UE to determine if it can acquire additional IP addresses and how to proceed with the acquisition process, thereby preventing service disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE initiates a new process to acquire an IP address for the PDN connection after the first bearer is established, then the UE may obtain an IP address with another version or a new IP address, but the process may fail when the network equipment does not allow the UE to acquire two IP addresses for the PDN connection, resulting in resource waste and service interruption
Solution Approach 1:
The network equipment performs preliminary action by determining and notifying the UE of its IP address capability (whether it supports single or dual IP addresses) before the UE attempts to acquire additional IP addresses. This preliminary notification prevents the UE from initiating acquisition processes that would fail, thereby avoiding service interruptions and resource waste while maintaining adaptability to different network configurations
2Adaptability or versatility
If the UE attempts to acquire additional IP addresses beyond network support, then the UE may obtain more IP address versions, but it results in resource waste and service interruptions
Solution Approach 1:
The network equipment provides feedback to the UE by notifying it of the network's IP address capability (single or dual address support). This feedback mechanism enables the UE to adjust its IP address acquisition behavior accordingly, acquiring additional addresses only when the network supports it, thereby preventing resource waste while maintaining acquisition flexibility when conditions permit
Data Source
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AI summary
A method for acquiring information includes: receiving an Internet Protocol (IP) address acquisition request or Packet Data Network (PDN) address allocation information sent by User Equipment (UE) (1); determining a PDN address capability according to the IP address acquisition request or the PDN address allocation information (2); and sending the determined PDN address capability to the UE. A UE and network equipment are also provided. Through the solutions, the PDN address capability is determined by the network and is sent to the UE, so as to indicate to the UE the IP address information that may be acquired in a current PDN connection, such that when the network cannot provide an IP address for the UE any more, the UE is prevented from acquiring other IP addresses in other manners to result in service abnormality.