Network Re-Entry Optimization via Handover Process Information
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Solution Overview
Problem
The existing IEEE 802.16e communication system faces issues with network re-entry due to handover, where mobile stations (MS) experience delays and inconsistencies in operation parameters due to unclear and unreliable transmission of SBC-RSP and REG-RSP messages, leading to potential errors and initialization of connections.
Innovation Solution
A system and method for network re-entry using a revised HO Process Optimization field that specifies which messages the target base station (BS) should transmit to the MS, allowing the MS to perform network re-entry based on optimized process information, including the use of timers to manage message receipt and retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the target BS transmits SBC-RSP and REG-RSP messages to the MS during network re-entry, then the MS can acquire operation parameters, but transmission errors or omissions may occur leading to inconsistencies and connection initialization
Solution Approach 1:
The patent applies preliminary action by having the target base station pre-configure the HO Process Optimization field in the RNG-RSP message before the MS performs network re-entry. This field预先 specifies which messages (SBC-RSP, REG-RSP, or both) the target BS will transmit, allowing the MS to prepare accordingly and avoid unnecessary waiting or retransmission attempts, thereby reducing re-entry delay while ensuring reliable message delivery.
Solution Approach 2:
The patent implements feedback through the HO Process Optimization field that provides explicit information from the target BS to the MS about the message transmission plan. This feedback mechanism allows the MS to adjust its behavior based on the target BS's capabilities and intentions, ensuring synchronized operations and preventing transmission errors or omissions that would otherwise cause connection initialization.
2Loss of information
If the MS waits for SBC-RSP and REG-RSP messages during network re-entry, then operation parameters can be received, but service delay increases due to uncertain message transmission timing
Solution Approach 1:
The target base station performs preliminary action by setting the HO Process Optimization field in advance within the RNG-RSP message. This field explicitly indicates whether the target BS will transmit SBC-RSP, REG-RSP, or both messages during network re-entry. The MS can then use this information to optimize its waiting behavior and avoid unnecessary delays while ensuring all necessary operation parameters are acquired.
3Productivity
If the HO Process Optimization field is used to optimize network re-entry, then message transmission can be streamlined, but ambiguity in message receipt may cause operation inconsistencies
Solution Approach 1:
The patent uses feedback through the HO Process Optimization field to provide clear, explicit information from the target BS to the MS about which messages will be transmitted. This feedback mechanism eliminates ambiguity by definitively specifying the message transmission plan, allowing the MS to reliably determine which operation parameters to expect and how to proceed with network re-entry, thereby maintaining both efficiency and consistency.
Data Source
AI summary
In a communication system, a mobile station (MS) sends a target base station (BS) a notification indicating that it is to perform a handover from a serving BS to the target BS. The target BS transmits to the MS handover process optimization information indicating a possibility of omitting at least one process required by the MS to perform a network re-entry operation with the target BS according to the handover notification from the MS. The MS receives the handover process optimization information and performs a network re-entry operation with the target BS according to the handover process optimization information.