Content Distribution Network for Wireless Handover
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining continuous information exchange and managing IP addresses for multiple-homed devices, leading to issues like broken TCP connections and inefficient handovers due to the lack of a generic mechanism to associate IP addresses with wireless devices across different radio access networks.
Innovation Solution
A content distribution network model is implemented, where a propagator node manages the forwarding of labeled information objects, allowing wireless devices to request information based on content descriptions and dynamically establish reverse forwarding paths, enabling efficient information retrieval and dissemination across multiple radio access networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless device uses multiple IP addresses for connections to different radio access networks, then the device can maintain simultaneous connections to multiple networks, but Internet protocols cannot relate these IP addresses to the same wireless device, causing routing inefficiency and connection management problems
Solution Approach 1:
The patent introduces a content distribution network model that acts as an intermediary between wireless devices and radio access networks. Instead of directly managing multiple IP addresses, the device interacts with a content distribution network that handles the association between content descriptions and network paths, effectively mediating the complexity of multi-homed connections.
Solution Approach 2:
The patent segments the communication architecture into distinct functional layers: wireless devices, content distribution network, and radio access networks. This segmentation allows each layer to operate independently with simplified protocols, where the content distribution network layer handles the complexity of multi-path routing without burdening the wireless device with IP address management.
2Reliability
If packet flows are tied to IP addresses in traditional networks, then routing can be straightforward, but handovers between access points break TCP connections and cause data loss in wireless environments where IP addresses are not related to attachment points
Solution Approach 1:
The patent inverts the traditional routing approach by not tying packet flows to IP addresses. Instead, the content distribution network uses content descriptions to identify and route information to wireless devices, regardless of which radio access network or IP address is currently being used. This inversion allows seamless handovers without breaking connections.
Solution Approach 2:
The patent implements dynamic path selection where the content distribution network continuously adapts routing decisions based on current network conditions and device location. As wireless devices move between access points, the content distribution network dynamically updates forwarding paths without requiring TCP connection resets, maintaining reliability while minimizing handover time.
3Reliability
If tunneling mechanisms are used to maintain connections during handovers, then connection continuity can be preserved, but tunneling overhead and latency increase, reducing transmission efficiency
Solution Approach 1:
The patent extracts the connection management function from the traditional IP tunneling mechanism. Instead of encapsulating packets in tunnels to maintain connections, the content distribution network maintains connection state independently and directly forwards information using content descriptions, eliminating the overhead of tunneling while preserving connection continuity.
Data Source
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AI summary
Methods, devices, and systems for information selection in a wireless communication system is provided. In one embodiment, a method of information selection in a wireless communication system comprises receiving a selection request signal by a propagator node, wherein said selection request signal identifies information requested by a selector node; determining all or a portion of said selection request signal matches all or a portion of an information tag stored in an information cache of said propagator node, wherein said information tag is associated with an information datagram; and forwarding said information datagram from said propagator node to said selector node, wherein said information datagram contains all or a portion said information.