REDCAP Terminal Access Control for Spectral Efficiency
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Solution Overview
Problem
In the new radio (NR) system, the introduction of reduced capability (REDCAP) terminals leads to decreased network transmission performance due to their narrower bandwidth and fewer receive antennas, which affects overall spectral efficiency when a large number of these terminals access the network.
Innovation Solution
A method and apparatus to control the access of REDCAP terminals by distinguishing between different types based on their bandwidth and antenna count, using flexible indication methods in synchronization signals and system information blocks to manage their access, and reporting terminal types to the network device for optimized scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If REDCAP terminals are introduced to reduce device complexity and cost, then terminal complexity and cost decrease, but network transmission performance deteriorates
Solution Approach 1:
The patent segments REDCAP terminals into different types (first-type and second-type) based on their bandwidth and antenna capabilities. The network device provides differentiated access control for each type, allowing terminals with similar characteristics to access together while preventing performance degradation from mixing terminals with vastly different capabilities. This segmentation resolves the contradiction by organizing low-complexity terminals into structured groups that maintain network efficiency.
Solution Approach 2:
The patent applies local quality by providing different access control parameters to different types of REDCAP terminals. First-type REDCAP terminals receive one set of access parameters while second-type receive another, tailored to their specific capabilities. This localized differentiation ensures that each terminal type operates optimally within the network, maintaining overall transmission performance despite the introduction of low-complexity devices.
2Quantity of substance
If a large number of REDCAP terminals access the network, then network coverage and access capacity increase, but spectral efficiency decreases
Solution Approach 1:
The patent segments the terminal population into first-type and second-type REDCAP terminals with distinct access control parameters. This segmentation prevents a large number of low-capability terminals from simultaneously accessing the network and degrading spectral efficiency, while still allowing sufficient access capacity for supported terminal types.
Solution Approach 2:
The patent changes access control parameters (such as access thresholds, resource allocation parameters) based on terminal type. By adjusting these parameters dynamically for different terminal categories, the network can accommodate more terminals overall while maintaining spectral efficiency through optimized resource distribution among terminal types.
Data Source
AI summary
This disclosure provides network device accessing methods and apparatuses for improving network transmission performance. One method includes: receiving first information, wherein the first information indicates whether a first-type reduced capability (REDCAP) terminal and a second-type REDCAP terminal are allowed to access a network device, wherein the first-type REDCAP terminal and the second-type REDCAP terminal operate in a same frequency range, and a number of receive antennas of the second-type REDCAP terminal is less than a number of receive antennas of the first-type REDCAP terminal, and determining based on the first information, whether to access the network device, wherein the terminal apparatus is the first-type REDCAP terminal or the second-type REDCAP terminal.