Secure MBS State Synchronization for Mid-Session Terminal Join
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Solution Overview
Problem
Existing wireless communication systems face challenges in seamlessly providing multicast and broadcast services, particularly in scenarios where terminals join mid-session or experience handovers, leading to issues with packet loss and delayed data reception.
Innovation Solution
The proposed solution involves configuring terminals with initial state variables, such as RX_DELIV, RX_NEXT, COUNT, and HFN values, using configuration information received from the base station, to synchronize data reception and ensure secure multicast and broadcast service communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configuration information is transmitted to terminals for MBS data reception, then packet loss and delay are prevented, but device complexity increases
Solution Approach 1:
The base station transmits configuration information (RX_DELIV, RX_NEXT, HFN values) to terminals before MBS data reception begins. This preliminary configuration ensures that terminals are properly set up with the correct state variable initial values, preventing packet loss and delay due to packet reordering while managing complexity through advance preparation rather than runtime adjustments
2Reliability
If state variables are aligned between base station and terminals, then secure MBS communication is enabled, but measurement precision requirements increase
Solution Approach 1:
The base station monitors terminal reception status and uses this feedback information to determine when to transmit configuration information. By basing the transmission timing on actual terminal reception status feedback, the system achieves precise state variable alignment between base station and terminals, ensuring secure MBS communication while managing precision requirements through feedback-driven timing
Data Source
AI summary
Provided are a method and apparatus for security multicast and broadcast service (MBS) communication in a wireless communication system. An operating method of a terminal in a wireless communication system includes receiving configuration information to be applied to MBS data from a base station, and receiving the MBS data based on the configuration information, wherein the configuration information is for configuring an initial value of a state variable corresponding to the MBS data.