Image Communication Apparatus Direct IP Address Storage
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Solution Overview
Problem
Current IP telephone networks face high server loads due to the need for terminals to transmit session request messages through SIP servers for every image communication, which limits real-time high-speed image transmission and requires registration of IP addresses and telephone numbers for peer-to-peer communication.
Innovation Solution
An image communication apparatus that stores destination IP addresses and identifiers corresponding to telephone numbers, allowing for direct session requests and peer-to-peer image transmission without the intervention of SIP servers after initial address acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals transmit session request messages through SIP servers for every image communication, then IP address acquisition is enabled, but server load increases and connection time extends
Solution Approach 1:
The patent applies preliminary action by having terminals acquire and store IP addresses of communication partners in advance during initial connections. The terminal stores the acquired IP address in its memory, enabling subsequent direct peer-to-peer communications without requiring SIP server intervention for address resolution, thus reducing server load while maintaining reliable connection establishment
Solution Approach 2:
The patent extracts the IP address acquisition function from the SIP server to the terminal device itself. By storing IP addresses locally at the terminal, the system removes the dependency on the SIP server for every connection attempt, extracting this function from the centralized server and distributing it to individual terminals, thereby reducing server processing requirements
2Loss of time
If terminals use peer-to-peer communication by storing IP addresses, then connection time is reduced and server load decreases, but initial setup complexity increases
Solution Approach 1:
The patent applies self-service by enabling terminals to autonomously acquire, store, and manage their own communication partners' IP addresses. The terminal independently performs the address resolution function that would otherwise require server intervention, making the system self-sufficient for subsequent connections and eliminating recurring server dependencies
Solution Approach 2:
The patent uses the terminal's memory as an intermediary between the SIP server and the communication partner. Instead of direct server-terminal communication for every connection, the stored IP address in memory acts as an intermediary that enables direct peer-to-peer data transmission, bypassing the server for the actual image communication phase
3Productivity
If IP addresses are registered at gateway for direct communication, then peer-to-peer transmission is enabled, but registration operation is required
Solution Approach 1:
The system enables terminals to automatically acquire IP addresses through standard SIP protocols during normal call setup procedures. This self-service approach eliminates the need for separate registration operations at gateways, as terminals independently obtain and store the necessary addressing information as part of the natural communication initiation process
Data Source
AI summary
According to this invention, the IP address and identifier of a destination apparatus are stored in correspondence with the telephone number of the destination apparatus. Input of the telephone number of the destination apparatus is accepted. Depending on whether or not the IP address corresponding to the accepted telephone number is stored, a session request is transmitted to the destination apparatus using that IP address so as to start an image communication.