Random Access Signaling for Priority Privacy Under Network Congestion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The plaintext RRC establishment cause in contention-based random access procedures can be easily intercepted by attackers, revealing the identity information of high-priority users, compromising user privacy.
Innovation Solution
A random access method where high-priority terminals determine the RRC establishment cause based on network congestion status, using access category or identity to conceal identity information when the network is not congested, and preferentially access when congested, while also encrypting uplink scheduling information with temporary keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal sends the RRC establishment cause in plain text to indicate high-priority user identity, then the network can identify and prioritize high-priority users, but the user identity information is disclosed and privacy is compromised
Solution Approach 1:
The patent changes the parameter of RRC establishment cause from plain text to encrypted form. The terminal encrypts the RRC establishment cause using a temporary key before sending it to the network device, and the network device decrypts it using the corresponding temporary private key. This parameter change maintains the ability to identify high-priority users while protecting their identity information from disclosure.
2Object-affected harmful factors
If the terminal always encrypts the RRC establishment cause to protect privacy, then user identity information is protected, but the network cannot efficiently identify and prioritize high-priority users during congestion
Solution Approach 1:
The patent implements a dynamic approach where the encryption behavior adapts based on network conditions. When the network is not congested, the terminal sends the RRC establishment cause in plain text to allow efficient priority identification. When the network is congested, the terminal encrypts the RRC establishment cause to protect privacy while still allowing the network to identify priorities through the encrypted data. This dynamic adjustment balances privacy protection with access efficiency.
3Object-affected harmful factors
If the terminal uses access category to determine RRC establishment cause when network is not congested, then identity information is concealed, but the terminal cannot preferentially access when network is congested
Solution Approach 1:
The patent applies preliminary action by having the terminal determine network congestion status before sending the RRC establishment cause. Based on this preliminary assessment, the terminal decides whether to use access category (for privacy protection when not congested) or access identity (for preferential access when congested). This preliminary determination ensures the terminal can both conceal identity when appropriate and maintain preferential access capability when needed.
Data Source
AI summary
This application relates to the field of wireless communication technologies, and discloses a random access method, a terminal, a network device, and a communication system. In this application, an RRC establishment cause may be determined in a random access procedure based on a network congestion status, and an uplink scheduling message including the RRC establishment cause is sent to the network device.