Segmented Uplink Message Encryption in Random Access
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Solution Overview
Problem
In wireless communication systems, conventional techniques fail to determine the identity of an access terminal during contention-based random access procedures, especially when encrypted transmissions are involved, leading to challenges in managing uplink messages effectively.
Innovation Solution
The method involves transmitting a random access preamble and receiving a random access response from a base station, with the access terminal sending a scheduled transmission message that includes an unencrypted portion to facilitate identity recognition and subsequent encryption or decryption based on the security context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption is applied to the scheduled uplink transmission message in contention-based random access procedure, then security of transmission is improved, but the base station cannot determine the identity of the access terminal
Solution Approach 1:
The scheduled transmission message is segmented into two distinct parts: an unencrypted portion containing identity information (such as C-RNTI or other terminal identifiers) and an encrypted portion containing sensitive data. This segmentation allows the base station to first identify the terminal using the unencrypted identity portion, then apply the appropriate security context to decrypt the encrypted portion, thereby resolving the contradiction between maintaining security and enabling identity determination.
Solution Approach 2:
Different parts of the message are assigned different security properties - the identity portion remains unencrypted to facilitate recognition, while the sensitive data portion is encrypted for security. This local differentiation of quality (encrypted vs. unencrypted sections) within the same message structure allows simultaneous achievement of both identity determination and transmission security.
2Reliability
If the entire scheduled transmission message is encrypted, then security is improved, but communication efficiency deteriorates due to inability to recognize terminal identity
Solution Approach 1:
The message is divided into unencrypted identity information and encrypted sensitive data portions. The unencrypted portion enables rapid terminal identification and security context retrieval, improving communication efficiency, while the encrypted portion maintains security for sensitive information.
Solution Approach 2:
Only the necessary sensitive portions of the message are encrypted, while the identity portion remains unencrypted. This selective encryption approach maintains security where needed while preserving communication efficiency for terminal recognition and setup procedures.
3Ease of operation
If unencrypted transmission is used for scheduled uplink message, then ease of operation is improved, but security deteriorates
Solution Approach 1:
The message structure is segmented into an unencrypted portion for easy terminal recognition and an encrypted portion for secure data transmission. This segmentation allows the system to leverage the simplicity of unencrypted transmission for identity purposes while protecting sensitive information through encryption.
Solution Approach 2:
Different security levels are applied to different parts of the message - the identity portion uses unencrypted transmission for ease of recognition, while the sensitive data portion uses encryption for security. This local quality differentiation optimizes both operational ease and security.
Data Source
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AI summary
Systems and methodologies are described that facilitate employing a random access procedure that leverages encrypted and/or unencrypted data in a scheduled uplink message. A random access preamble can be sent from an access terminal to a base station, and a random access response can be sent from the base station to the access terminal. A scheduled transmission message can be sent from the access terminal to the base station based upon a grant included in the random access response. When contention based random access is employed, the scheduled transmission message or a portion thereof can be unencrypted. Further, non-security-critical information can be sent in an unencrypted manner in the scheduled transmission message, while security-critical information can be encrypted for transmission (e.g., included in an encrypted portion of the scheduled transmission message and/or transmitted in a subsequent encrypted normal scheduled transmission message).