IAP Location Preloading for Faster Downlink Packet Routing
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Solution Overview
Problem
In mobile communication networks, the delay in resolving the location of a wireless device at an IP Announcement Point (IAP) leads to buffering of downlink packets, affecting transport protocols and user experience, particularly in anchorless/mobile service chaining architectures.
Innovation Solution
A method and system for preloading the location of a wireless device in a local cache at the IAP by using a Location Maintenance Node (LMN) to send preload commands to the IAP or Location Register, ensuring location information is available when downlink packets arrive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the IAP queries the Location Register to resolve the location of a wireless device, then the location information can be obtained, but the packet processing delay increases and packets need to be buffered
Solution Approach 1:
The patent applies preliminary action by having the IAP proactively query the Location Register and obtain location information before actual downlink packets arrive. This is achieved through a timer mechanism that triggers a location query when the IAP detects that a wireless device is in inactive state and packets are expected to arrive soon. By performing the location resolution in advance, the system eliminates the buffering delay that would occur if the query were performed only when packets actually arrived.
2Reliability
If the IAP buffers downlink packets until location is resolved, then packets can be delivered correctly, but communication delay increases and user experience degrades
Solution Approach 1:
The patent applies preliminary action by resolving the location of the wireless device before packets need to be buffered. The IAP uses a timer mechanism to proactively query the Location Register when it detects that downlink packets are expected to arrive soon (when the device is in inactive state). This ensures that location information is already available when packets arrive, eliminating the need for buffering and thereby maintaining both reliability and high communication speed.
3Quantity of substance
If the IAP performs location lookup only when packets arrive, then buffering is minimized, but location resolution delay affects transport protocol performance
Solution Approach 1:
The patent applies preliminary action by having the IAP perform location lookup in advance based on timer expiration or detection of inactive state, rather than waiting for packets to arrive. This proactive approach ensures that location information is already resolved when packets arrive, achieving both minimal buffering and zero location lookup delay for actual packet processing.
Solution Approach 2:
The patent applies periodic action through the use of a timer mechanism that periodically checks whether downlink packets are expected to arrive soon. When the timer expires or the inactive state is detected, the IAP triggers a location query. This periodic monitoring allows the system to balance between proactive location resolution (reducing delay) and avoiding unnecessary queries (reducing overhead).
Data Source
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AI summary
It is provided a method for assisting preloading of a location of a wireless device in a mobile communication network. The method is performed in a communication tracker and comprises the steps of: receiving an uplink packet originating from the wireless device, the uplink packet comprising a source address and a destination address; determining whether a connection database comprises a matching entry corresponding to both the source address and the destination address; transmitting a new connection message when there is no matching entry in the connection database; and storing a new entry in the connection database, the new entry comprising both the source address and the destination address when there is no matching entry in the connection database.