User Equipment Bandwidth Adaptation in 5G RRC Idle Mode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G networks, user equipment with varying bandwidth capabilities, including IoT devices, face challenges in communicating effectively in environments where the base station's maximum supported bandwidth exceeds their own capabilities, particularly in the Radio Resource Control (RRC) IDLE mode.
Innovation Solution
The user equipment is designed to communicate using a maximum bandwidth available, which is less than or equal to the base station's, by incorporating a receiver unit to monitor synchronization signals, master information blocks, and paging channels, allowing for flexible communication across different bandwidths. This involves dividing the base station's bandwidth into sub-bands and allocating resources based on the user equipment's capabilities, enabling communication even in RRC IDLE mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station uses a large bandwidth for communication, then the system capacity and data transmission rate increase, but user equipment with limited bandwidth capability cannot communicate effectively
Solution Approach 1:
The base station divides the large bandwidth into multiple sub-bands and transmits synchronization signals and system information in different sub-bands. User equipment can select and monitor only the sub-bands within its bandwidth capability, enabling effective communication despite bandwidth limitations while the base station maintains high system capacity using the full bandwidth.
2Device complexity
If the base station transmits all system information in a single location, then the transmission process is simple, but user equipment with limited bandwidth cannot acquire all necessary information
Solution Approach 1:
The base station segments system information into multiple parts and transmits them in different sub-bands. User equipment with limited bandwidth can acquire the necessary system information by monitoring only the relevant sub-bands within its capability, ensuring complete information acquisition without requiring the equipment to handle the full bandwidth.
3Loss of information
If user equipment monitors all synchronization signals in the maximum bandwidth, then the most information is available, but the energy consumption and processing complexity increase significantly
Solution Approach 1:
User equipment is configured to monitor synchronization signals and system information only in specific sub-bands relevant to its bandwidth capability, rather than scanning the entire maximum bandwidth. This localized monitoring approach reduces energy consumption and processing complexity while ensuring acquisition of necessary synchronization information.
4Device complexity
If the base station supports only fixed bandwidth configurations, then the system design is simplified, but it cannot accommodate user equipment with various bandwidth capabilities
Solution Approach 1:
The base station dynamically allocates different sub-bands for transmitting synchronization signals and system information, and can flexibly configure which sub-bands are active based on the bandwidth capabilities of connected user equipment. This dynamic approach enables the system to accommodate various bandwidth configurations while maintaining manageable design complexity through standardized procedures.
Data Source
AI summary
User equipment of a radio communication system including a base station that performs communication using a maximum bandwidth which is a largest bandwidth available for communication and the user equipment in which a largest bandwidth available for communication is equal to or less than the maximum bandwidth, the user equipment including a receiver unit configured to receive a radio signal transmitted from the base station; and an acquisition unit configured to acquire a radio resource of a master information block corresponding to a synchronization signal, a radio resource of a system information block, and a radio resource of a paging channel, wherein the receiver unit monitors the radio resource of the synchronization signal, the radio resource of the master information block, the radio resource of the system information block, or the radio resource of the paging channel, when the user equipment is in an RRC idle mode.