Redcap Access Signaling Split Between MIB and RMSI
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Solution Overview
Problem
The existing MTC and NB-IoT technologies struggle to meet the speed and delay requirements of advanced IoT services like video surveillance and smart home applications due to limited access control parameter capacity in Master Information Blocks (MIB) and the need for multiple PDCCH cycles for low-end Redcap UEs, leading to high energy consumption.
Innovation Solution
The proposed method segregates access control parameters for different types of Redcap UEs into distinct signaling channels such as MIB, PDCCH, and PDSCH, allowing high-end and low-end UEs to receive their respective parameters efficiently, reducing unnecessary information reading and conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all access control parameters are placed in MIB, then the signaling structure is simplified, but the available bits in MIB are very limited and cannot effectively indicate the access control parameters of various types of Redcap UEs
Solution Approach 1:
The access control parameters are segmented into two groups: common parameters are placed in MIB while type-specific parameters are placed in RMSI. This segmentation allows MIB to maintain its simplicity while RMSI provides the additional capacity needed to indicate parameters for different Redcap UE types effectively.
2Adaptability or versatility
If all access control parameters are placed in RMSI PDCCH or RMSI PDSCH, then all Redcap UE types can receive their parameters, but low-end terminals need to accumulate multiple cycles of PDCCH for demodulation which increases energy consumption
Solution Approach 1:
The critical access control parameters are extracted from RMSI and placed in MIB, which has better coverage and requires less processing. This allows low-end Redcap UEs to obtain essential parameters with minimal PDCCH accumulation, reducing energy consumption while RMSI retains type-specific parameters for advanced UEs.
3Reliability
If MTC and NB-IoT technologies are used for low rate and high delay IoT services, then coverage is improved, but they can no longer meet the speed and delay requirements of current IoT services
Solution Approach 1:
The system dynamically adapts to different Redcap UE types with varying capabilities. By providing type-specific access control parameters, the network can optimize resource allocation and scheduling for each UE type, enabling both coverage-enhanced modes for low-end UEs and high-speed modes for advanced UEs within the same network.
Data Source
AI summary
An access control method and device are disclosed. A network device determines signalling. The signalling at least includes: a parameter related to access control of a first type of terminal or a parameter related to access control of a second type of terminal. The parameter related to the access control of the first type of terminal and the parameter related to the access control of the second type of terminal are carried in different signalling. A terminal receives signaling corresponding to a type of the terminal itself, based on the type of the terminal itself.