Network Re-Entry Notification Mechanism for IEEE 802.16e Handover
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Solution Overview
Problem
In IEEE 802.16e communication systems, there is a need for a method to notify the completion of a network re-entry procedure and ensure normal reception of unsolicited messages during this process, as existing optimizations may lead to mis-synchronization and unrecognized message transmission failures.
Innovation Solution
The implementation of a Handover Process Optimization Type/Length/Value (TLV) mechanism that allows for the omission of specific message transmission/reception processes during network re-entry, accompanied by acknowledgment messages (RNG-RSP ACK, SBC-RSP ACK, and REG-RSP ACK) to confirm normal receipt of unsolicited messages by the mobile station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If message transmission/reception processes are omitted during network re-entry to optimize handover speed, then productivity is improved, but reliability deteriorates due to potential mis-synchronization and unrecognized message transmission failures
Solution Approach 1:
The patent implements an acknowledgment mechanism where the mobile station sends ACK messages (RNG-RSP ACK, SBC-RSP ACK, REG-RSP ACK) to confirm receipt of unsolicited messages from the target base station. This feedback loop allows the base station to verify whether optimization messages were successfully received, enabling reliable detection of transmission failures while maintaining the speed benefits of message omission during network re-entry procedure
Solution Approach 2:
The base station transmits unsolicited acknowledgment messages (RNG-RSP ACK, SBC-RSP ACK, REG-RSP ACK) to the mobile station before the mobile station completes its network re-entry procedure. This preliminary action allows the mobile station to have message reception status confirmed in advance, enabling faster handover while maintaining reliability through pre-established acknowledgment channels
2Reliability
If all standard message transmission processes are performed during network re-entry, then reliability is improved, but productivity deteriorates due to increased handover time
Solution Approach 1:
The patent applies partial action by selectively transmitting only essential unsolicited messages (RNG-RSP ACK, SBC-RSP ACK, REG-RSP ACK) during network re-entry while omitting other non-critical message exchanges. This partial message transmission approach maintains sufficient reliability for critical handover functions while reducing overall handover time compared to performing all standard message transmission processes
Solution Approach 2:
The patent changes the operational parameters of message transmission by modifying the message flow structure during network re-entry. Instead of following the complete standard message exchange sequence, the system adjusts which messages are transmitted and in what order, allowing optimized handover performance while maintaining necessary reliability through selective message acknowledgment
Data Source
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AI summary
Provided is a system and method for notifying completion of a network re-entry procedure in a communication system. In the system, a mobile station (MS) completes the network re-entry procedure with a base station (BS), and then notifies the completion of the network re-entry procedure to the BS.