Segmented User Equipment Identifier for 5G Control Channel CRC Masking
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Solution Overview
Problem
Current mobile telecommunications systems, particularly 5G technologies, face challenges in efficiently managing user equipment identifiers (UE-IDs) that are larger than conventional CRC sizes, leading to issues with control channel CRC masking and data channel CRC masking, especially in scenarios like RRC Inactive State Paging and NR networks with massive MTC terminals.
Innovation Solution
The proposed solution involves generating a composite user equipment identifier with a first part for user equipment-related identification and a second part for network-related identification, allowing for flexible adjustment of UE-ID size to match frozen bits, and using two-stage CRC masking to accommodate larger UE-IDs, with the extended C-RNTI being split into control and data parts for efficient CRC masking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If user equipment identifier size is increased to accommodate more UEs, then UE identification capability is improved, but control channel CRC masking complexity increases
Solution Approach 1:
The UE identifier is segmented into multiple parts: a first part (e.g., 16 bits) used for control channel CRC masking and a second part (e.g., 24 bits) used for data channel CRC masking or other purposes. This segmentation allows the control channel to use a manageable identifier size while still supporting a large total number of UEs through the combined identifier space.
2Quantity of substance
If user equipment identifier size is increased to support massive MTC terminals, then UE identification capability is improved, but transmission overhead increases
Solution Approach 1:
By dividing the UE identifier into multiple parts with different applications, the patent reduces the overhead on the control channel while maintaining the ability to identify a large number of MTC terminals. The first part provides compact control channel masking, while the second part extends the identification capability for massive terminal support.
3Measurement precision
If user equipment identifier size is increased to maintain UE uniqueness, then identification accuracy is improved, but power consumption increases
Solution Approach 1:
The patent segments the UE identifier processing into different parts that can be handled with different processing depths. The control channel uses a shorter first part for quick identification, reducing power consumption for basic operations, while the full identifier (first part + second part) maintains uniqueness accuracy when needed.
4Ease of operation
If conventional CRC masking is used with larger UE-IDs, then implementation simplicity is maintained, but masking effectiveness deteriorates
Solution Approach 1:
The patent applies conventional CRC masking techniques to a segmented first part of the UE identifier, maintaining implementation simplicity. The first part is specifically designed to work with standard CRC masking, while the second part handles additional identification requirements, thus preserving both simplicity and effectiveness.
Data Source
AI summary
An apparatus comprising circuitry configured to generate a user equipment identifier which is unique on Anchor cell level or which is unique in RAN notified area level.