Packet Processing Apparatus Sequence Number Time Stamp Verification
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Solution Overview
Problem
In IP network-based broadcasting, the discontinuity of sequence numbers and time stamps across different time zones leads to packet abandonment and incorrect reception due to the characteristics of IP networks, where packet order changes and sequence number continuity is disrupted.
Innovation Solution
A received packet processing method that calculates a linear expression representing the correspondence between sequence numbers and time stamps, determines if received packets satisfy this expression, and rearranges or outputs packets to maintain continuity, ensuring correct ordering and preventing packet abandonment during transmitter changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets with discontinuous sequence numbers are accepted without rearrangement, then packet loss is reduced, but packet order is disrupted and broadcasting correctness is compromised
Solution Approach 1:
The invention changes the parameter for packet acceptance criteria from strict sequence number continuity to a combination of sequence number correspondence with time stamps. By introducing time stamp verification, the system can accept packets from different time zones while maintaining correct temporal ordering, thus resolving the contradiction between packet acceptance and order maintenance.
Solution Approach 2:
The invention introduces time stamp as an intermediary parameter between sequence number and packet acceptance. Instead of directly verifying sequence number continuity, the system uses time stamp correspondence as a mediator to determine packet validity, allowing packets from different transmitters to be correctly integrated while maintaining broadcasting correctness.
2Ease of operation
If packets are rearranged to restore sequence number continuity, then packet order is corrected, but processing time increases and productivity decreases
Solution Approach 1:
The invention performs preliminary verification of time stamp correspondence before packet acceptance. By pre-checking whether the time stamp corresponds to the expected time based on sequence number, the system can quickly determine packet validity without needing to perform complex rearrangement operations, thus maintaining high processing speed while ensuring correct packet ordering.
3Ease of operation
If strict sequence number continuity is enforced, then packet order is maintained, but packets during transmitter changeover are abandoned
Solution Approach 1:
The invention makes the packet acceptance criteria dynamic by introducing time stamp verification that adapts to transmitter changes. Instead of using a fixed sequence number continuity rule, the system dynamically adjusts its acceptance criteria based on time stamp correspondence, allowing it to maintain packet ordering while accepting packets during transmitter changeovers.
Solution Approach 2:
The invention implements feedback through time stamp verification, where the system continuously monitors time stamp correspondence to determine packet validity. This feedback mechanism allows the system to detect transmitter changes and adjust packet acceptance accordingly, preventing packet abandonment while maintaining correct ordering.
Data Source
AI summary
Packets each including a sequence number and a time stamp are sequentially received, and a linear expression representing a correspondence between the sequence number and the time stamp is calculated based on the received packets. If a packet including a sequence number discontinuous to sequence numbers of the previously received packets is received, it is determined whether the currently received packet satisfies the linear expression by checking the sequence number and the time stamp of the currently received packet. If the currently received packet including the sequence number discontinuous to the sequence numbers of the previously received packets satisfies the linear expression, an output order is changed according to the sequence numbers of the packets. If the currently received packet including the sequence number discontinuous to the sequence numbers of the previously received packets does not satisfy the linear expression, the currently received packet is output.