Terminal Device Information Exchange Method Reducing Data Overhead
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Solution Overview
Problem
Current communications systems require multiple information exchanges between terminal devices and core network devices for identity authentication and data protection, leading to increased time consumption and power overheads due to the large amount of data exchanged.
Innovation Solution
An information exchange method that reduces the number of exchanges by transmitting only attach request, accept, and complete information, using integrity check codes and key generation algorithms to authenticate identities and encrypt data, thereby minimizing data exchange and processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple information exchanges are performed for identity authentication and data protection, then security of the communications system is improved, but time consumption and power overheads increase
Solution Approach 1:
The patent extracts and transmits only the essential authentication elements (integrity check codes and encrypted data) rather than complete information packets. The terminal device obtains an integrity check code from the attach accept information, generates a corresponding integrity check code locally, and compares them to authenticate the core network device. This extraction of minimal necessary data maintains security while reducing exchange overhead.
Solution Approach 2:
The patent changes the parameter of information exchange from transmitting complete authentication packets to transmitting only critical authentication parameters (integrity check codes). By transforming the authentication mechanism to rely on code comparison rather than full data exchange, the system maintains reliability while significantly reducing time consumption.
2Reliability
If multiple information exchanges are performed for identity authentication and data protection, then security of the communications system is improved, but power overheads of the terminal device increase
Solution Approach 1:
The terminal device extracts only the necessary integrity check code from the attach accept information and performs local verification. This minimizes the processing and transmission energy required while maintaining authentication security. The device generates the corresponding code locally using stored key material and compares it with the received code, avoiding energy-intensive full packet processing.
Solution Approach 2:
The patent applies partial action by performing only the essential authentication operations (code generation and comparison) rather than complete information exchange protocols. This partial authentication approach consumes less power while achieving the same security objective.
3Reliability
If a large amount of data is exchanged for authentication and encryption negotiation, then security is ensured, but the quantity of data transmitted increases
Solution Approach 1:
The patent extracts the essential authentication elements (integrity check codes) from the complete authentication data set. Instead of exchanging full authentication packets containing multiple parameters, the system transmits only the critical integrity check codes and encrypted data, dramatically reducing data volume while maintaining security.
Solution Approach 2:
The terminal device creates a local copy of the integrity check code from stored key material and compares it with the received code. This copying mechanism eliminates the need to transmit the original key material or complete authentication data, reducing transmitted data volume while ensuring security through verification.
Data Source
AI summary
This application discloses an information exchange method and apparatus. In the method, a terminal device transmits attach request information to a core network device, receives attach accept information of the core network device, where the attach accept information includes a first integrity check code; the terminal device obtains a second integrity check code based on the attach accept information; and the terminal device obtains, if the first integrity check code is the same as the second integrity check code, a third integrity check code based on encrypted attach complete information, and transmits encrypted attach complete information to which the third integrity check code is added to the core network device. This reduces data exchange procedures, reduces an amount of data of exchanged information, and reduces a time consumed in an information exchange process performed between the terminal device and the core network device.