Link-Local Multicast HTTP Response Delivery
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in delivering the same content to multiple devices while allowing individual control over reception, particularly in scenarios where infrastructure burden needs to be minimized.
Innovation Solution
The use of extended Internet Protocol (IP) multicast enables the efficient delivery of a single Hypertext Transfer Protocol (HTTP) response to multiple clients, employing IP multicast addresses and Network Attachment Point (NAP)-based protocol mapping to optimize link-local multicast responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unicast delivery is used to deliver HTTP responses to multiple clients, then each client receives individual responses, but the network load and infrastructure burden increase significantly
Solution Approach 1:
The patent combines multiple unicast responses into a single multicast response that can be delivered to multiple clients simultaneously. The network attachment point consolidates HTTP responses intended for multiple clients and delivers them via IP multicast, reducing redundant transmissions while maintaining individual client control through selective joining of multicast groups.
Solution Approach 2:
The patent creates a universal delivery mechanism that serves both unicast and multicast functions. The system can deliver content to multiple clients through a single multicast transmission while still allowing individual clients to control their reception by joining or leaving multicast groups, providing both efficiency and individual control.
2Productivity
If multicast delivery is used to deliver HTTP responses to multiple clients, then network efficiency improves, but infrastructure complexity and router burden increase
Solution Approach 1:
The patent introduces the network attachment point as an intermediary that handles the complexity of multicast management. This intermediary consolidates HTTP responses, determines which clients should receive them, and manages multicast group membership, thereby shielding end clients from multicast complexity while improving delivery efficiency.
Solution Approach 2:
The patent enables clients to self-manage their multicast participation by joining or leaving multicast groups based on their needs. This self-service approach allows clients to control their own reception without requiring complex centralized management, reducing the router burden while maintaining efficiency.
3Ease of manufacture
If all clients receive all multicast responses, then delivery simplicity increases, but resource waste on unintended recipients occurs
Solution Approach 1:
The patent applies local quality by allowing different clients to have different reception characteristics. Clients can selectively join multicast groups based on their specific needs, ensuring they receive only relevant content. This creates localized optimization where each client's resource consumption matches their actual requirements rather than a uniform approach.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A Network Access Point (NAP) in an ICN may have multiple clients requesting the same resource. Instead of sending multiple link-local unicast transmissions, the multiple clients may subscribe to a response bucket based on their unicast address and the NAP may send a multicast response to the group based on previously issued HTTP requests. The response bucket may contain multiple clients attached to the NAP. A multicast address of the response bucket may be used by the NAP to send the multicast response. A class D octet in the multicast group address may be derived from a class C octet of the individual client IP addresses.