MAMS Packet Recovery Using Retransmission and Network Coding
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Solution Overview
Problem
Existing MAMS frameworks do not include mechanisms for recovering lost packets due to interference, congestion, packet collisions, and buffer overflow in wireless networks.
Innovation Solution
Implementing end-to-end retransmission and network coding techniques to detect and recover lost packets, including the use of Negative Acknowledgement messages and network coding operations like XOR to reconstruct missing packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MAMS framework is used to flexibly select access network paths, then quality of experience and network utilization are improved, but packet loss recovery capability is lacking
Solution Approach 1:
The patent introduces an intermediary packet recovery mechanism that operates between the MAMS framework and the underlying transport protocols. This intermediary layer provides packet loss detection and recovery capabilities without requiring fundamental changes to the MAMS framework architecture, thus improving reliability while maintaining acceptable complexity levels.
Solution Approach 2:
The patent segments the packet recovery function into separate modular components that can be independently deployed and managed. By dividing the recovery mechanism into distinct modules (packet detection, packet retransmission, packet reconstruction), the system achieves improved reliability without proportionally increasing overall system complexity.
2Productivity
If multiple access networks are combined, then network utilization and quality of experience are improved, but packet loss due to interference and congestion increases
Solution Approach 1:
The patent implements preliminary packet recovery actions by pre-establishing recovery mechanisms and buffer storage capabilities before packet loss occurs. When packets are lost due to interference or congestion in multi-access scenarios, the system can quickly retrieve and retransmit packets from pre-positioned buffers, thus maintaining high network utilization while compensating for reduced reliability.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors packet delivery status across multiple access networks and dynamically adjusts transmission strategies. When packet loss is detected in one access network, the feedback loop triggers retransmission through alternative paths or recovery mechanisms, thereby maintaining both high utilization and reliability in multi-access environments.
Data Source
AI summary
Packet recovery mechanisms for wireless networks, which improve end-to-end (e2e) reliability, are provided. First embodiments include packet retransmission between a receiver and a transmitter, wherein, if the transmitter cannot find a lost packet in its transmission buffer, the transmitter sends a First Sequence Number (FSN) report to the receiver to notify the receiver of a sequence number (SN) of an oldest (acknowledged) packet in the buffer. In response, the receiver does not report lost packets whose SN is older than the FSN. Second embodiments involve using a network coding algorithm to recover lost packets, wherein the transmitter sends a control message to the receiver that includes a coded packet to be recovered and information for decoding the coded packet. Other embodiments may be described and/or claimed.