Handover Bandwidth Adjustment via RTCP and RTP Tunnel Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Handovers between different network types often result in data packet loss due to bandwidth differences, deteriorating the quality of real-time multimedia services, as existing technologies fail to consider and adjust for variations in transmission bandwidth during the handover process.
Innovation Solution
A method that involves a mobile terminal requesting a bandwidth change through an RTCP message packet during handover, changing the data transmission tunnel by setting the M field of an RTP packet, and establishing a new L2 tunnel to accommodate the new bandwidth, ensuring seamless communication across different networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover is performed between different network types without bandwidth adjustment, then mobility and network switching capability are improved, but data packet loss increases and service quality deteriorates
Solution Approach 1:
The patent applies preliminary action by notifying the server of the upcoming handover before it occurs. The mobile terminal sends a handover notification message to the server in advance, allowing the server to prepare bandwidth adjustment and data buffering. This proactive approach prevents data packet loss by ensuring the receiving end is ready for the network transition.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the transmission bandwidth based on the target network's capabilities. The server receives bandwidth information from the mobile terminal, compares it with current transmission parameters, and modifies the data stream accordingly. This ensures compatibility between different network types and prevents packet loss due to bandwidth mismatch.
2Reliability
If transmission bandwidth is adjusted during handover, then data packet loss is reduced and service quality is maintained, but communication protocol complexity increases
Solution Approach 1:
The patent uses the server as an intermediary to manage bandwidth adjustment during handover. Instead of the mobile terminal directly controlling bandwidth changes, it notifies the server which then handles the complex tasks of data buffering, format conversion, and retransmission. This mediator approach simplifies the terminal's protocol requirements while maintaining high transmission reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the mobile terminal reports its handover status and target network bandwidth capabilities to the server. The server uses this feedback information to make informed decisions about bandwidth adjustment and data retransmission strategies, ensuring optimal service quality without requiring complex terminal-side protocol handling.
3Duration of action of stationary object
If data buffering and retransmission are implemented during handover, then service continuity is improved, but transmission delay increases
Solution Approach 1:
The patent applies partial action by selectively buffering only the necessary data portions during handover. The server identifies which data packets need to be retained and retransmitted based on the handover notification, rather than buffering all incoming data. This selective approach maintains service continuity while minimizing unnecessary delays.
Solution Approach 2:
The patent implements skipping by allowing critical real-time data to pass through without buffering during handover. The server prioritizes different data types, rushing through time-sensitive packets while buffering less critical data. This differential handling maintains service continuity for essential communications while minimizing overall transmission delay.
Data Source
AI summary
A method, medium, and apparatus controlling a handover between different network types, including the operations of transmitting a message requesting a transmission bandwidth change, so as to have a transmission bandwidth supported by a new network after movement of the mobile terminal, from the mobile terminal to the server after performing the handover, changing the transmission bandwidth of the server to be supported by the new network based on the transmitted message of requesting the bandwidth change, transmitting a message acknowledging the changed transmission bandwidth from the server to the router, and transceiving data through a new data transmission tunnel between the router and a new access point within the new based on the message acknowledging the changed transmission bandwidth. Accordingly, loss of data packets occurring when a handover is performed may be effectively prevented.