D2D Scrambling Code Parameter Determination for LTE User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE systems lack a scrambling scheme for Device to Device (D2D) communication, making it challenging to scramble and descramble information effectively during D2D communication processes.
Innovation Solution
A D2D communication method and user equipment that determine and use specific scrambling code parameters, such as common or specific scrambling code parameters, to scramble and descramble bits based on D2D group identifiers, synchronization signals, and service type identifiers, ensuring secure and efficient information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no scrambling scheme is used in D2D communication, then the system maintains simplicity, but information security and user differentiation cannot be achieved
Solution Approach 1:
The patent applies parameter changes by using different scrambling code parameters (such as different initialization values or code sequences) to scramble data for different users or different types of information in D2D communication. This enables information security and user differentiation without requiring a fundamentally complex new scrambling architecture,而是 by changing the parameters of existing scrambling codes.
2Loss of information
If scrambling is implemented in D2D communication, then information security and user differentiation are achieved, but the system complexity increases
Solution Approach 1:
The patent applies local quality by selectively applying scrambling only to specific parts of the D2D communication system where information security is needed, such as specific data channels or user groups, rather than uniformly scrambling all communications. This reduces overall system complexity while still achieving confidentiality where required.
Solution Approach 2:
The patent uses parameter changes to achieve information confidentiality by varying scrambling code parameters (initialization values, code lengths, or sequences) based on user identities or data types, enabling selective confidentiality without requiring complex encryption architectures for the entire system.
3Measurement precision
If scrambling code parameters are determined using D2D group identifiers, then user differentiation is achieved, but the determination process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-configuring or pre-determining the mapping relationships between D2D group identifiers and scrambling code parameters. This allows the system to achieve accurate user identification through simple lookup or direct mapping during communication, rather than performing complex real-time calculations, thus reducing determination process complexity.
Data Source
Figure 1~3
Figure 4
Figure 5~6
AI summary
The present invention discloses a D2D communication method and user equipment. The D2D communication method includes: determining, by first user equipment, a value of a scrambling code parameter, where the scrambling code parameter includes at least one of the following parameters: a common scrambling code parameter and a specific scrambling code parameter; scrambling, by the first user equipment, a to-be-sent bit according to the value of the scrambling code parameter; and sending, by the first user equipment, a scrambled to-be-sent bit. According to the D2D communication method and the user equipment disclosed in the present invention, transmission information can be scrambled and descrambled in a D2D communication process, thereby improving feasibility of a D2D communication scheme and improving user experience.