RRC Resume MAC Verification Using Aligned Parameter Sets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in existing 3GPP suspend and resume procedures is the verification of a terminal device's resume MAC value by a network device, which is not adequately addressed, leading to inconsistencies in how UEs and base stations calculate and verify this value.
Innovation Solution
A method and apparatus that enable terminal devices and network devices to negotiate and align on a parameter set for calculating and verifying the resume MAC value, using additional parameters like the resume cause value or RRC resume request message, ensuring secure and consistent resume message authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device uses additional parameters (resume cause value or RRC resume request) to calculate the resume MAC value, then the security protection of the RRC resume request is improved, but the device complexity and verification difficulty increase
Solution Approach 1:
The patent applies parameter changes by introducing additional parameters (resume cause value, RRC resume request) into the MAC value calculation process. The terminal device calculates the resume MAC value using these additional parameters, and the network device verifies it accordingly, thereby enhancing security through parameter modification rather than structural complexity
Solution Approach 2:
The patent implements preliminary action by having the terminal device calculate the resume MAC value in advance using the additional parameters before sending the RRC resume request. The network device also prepares the verification process beforehand, ensuring that when the resume request arrives, both sides are already aligned on the verification methodology, reducing real-time complexity
2Ease of operation
If the terminal device and network device use different parameter sets for calculating and verifying the resume MAC value, then the ease of operation is improved, but the reliability of the verification process deteriorates
Solution Approach 1:
The patent implements feedback by having the terminal device send an indication message to the network device, specifying which parameter set it used for calculating the resume MAC value. The network device receives this feedback and adjusts its verification process accordingly, ensuring both sides use the same parameter set. This feedback mechanism maintains verification consistency without complicating the operation
Solution Approach 2:
The patent applies dynamics by making the parameter set selection flexible and adaptable. The terminal device can choose different parameter sets based on its capabilities and the network conditions, and the network device dynamically adjusts its verification process based on the received indication. This dynamic adaptation ensures consistency while maintaining ease of operation
Data Source
AI summary
Embodiments of this application provide a connection resume method and an apparatus. The method includes: A terminal device sends a first message that carries first indication information to a first network device. The first indication information is used to indicate to calculate a resume MAC value based on a first parameter set. The first parameter set includes one or more of a resume cause value or an RRC resume request message. The terminal device receives a second message from the first network device. When the second message carries second indication information, the terminal device sends an RRC resume request message that carries the resume MAC value to a second network device. The second indication information is used to indicate to verify the resume MAC value based on the first parameter set.