Partial Bandwidth Radio Transmission for Narrowband UE Efficiency
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Solution Overview
Problem
In 5G systems, narrowband User Equipment (UE) experiences high power consumption and low system efficiency due to the need to frequently switch between anchor and other sub-bands to receive system information and paging messages, which is inefficient and resource-intensive.
Innovation Solution
A partial bandwidth radio transmission method and device that configures a second common control channel on sub-bands other than the anchor sub-bands, synchronizing it with the anchor sub-band's synchronization signal block, allowing UEs to use partial bandwidth within a larger system bandwidth for data transmission and reception, thereby improving system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrowband UEs camp on anchor sub-bands and jump back to receive system information and paging messages, then system information reception is ensured, but power consumption increases and system efficiency decreases
Solution Approach 1:
The system bandwidth is divided into multiple sub-bands, with specific sub-bands designated as anchor sub-bands for broadcasting system information and paging messages. Narrowband UEs are assigned to non-anchor sub-bands for data transmission and can remain on these sub-bands without needing to frequently switch to anchor sub-bands, thereby reducing power consumption while ensuring reliable reception of essential system information.
Solution Approach 2:
The patent introduces a mechanism where the network configures and indicates anchor sub-bands to narrowband UEs, acting as an intermediary that guides UEs on which sub-bands to monitor for system information. This intermediary configuration allows UEs to operate efficiently on non-anchor sub-bands while knowing exactly where to find critical information, reducing unnecessary sub-band switching and power consumption.
2Reliability
If narrowband UEs frequently switch between anchor and other sub-bands, then system information and paging messages are received, but system efficiency decreases
Solution Approach 1:
By segmenting the bandwidth into anchor and non-anchor sub-bands with clear functional assignments, the system eliminates the need for frequent switching. Narrowband UEs can maintain connections on non-anchor sub-bands for data transmission while the network efficiently delivers paging messages and system information on anchor sub-bands, improving overall system efficiency.
Solution Approach 2:
The network performs preliminary configuration by indicating anchor sub-bands to narrowband UEs in advance. This preliminary action provides UEs with the necessary information about where to find system information and paging messages, allowing them to operate efficiently on non-anchor sub-bands without needing to frequently switch, thereby improving system efficiency.
3Use of energy by moving object
If narrowband UEs use partial bandwidth, then power consumption decreases, but the need to switch sub-bands for system information creates operational complexity
Solution Approach 1:
The system is segmented into anchor sub-bands for control information and non-anchor sub-bands for data transmission. Narrowband UEs operating on partial bandwidth can remain on their assigned non-anchor sub-bands without complex switching operations, as the network handles system information delivery on anchor sub-bands. This segmentation simplifies UE operations while maintaining low power consumption.
Solution Approach 2:
The network provides self-service by configuring and indicating anchor sub-bands to narrowband UEs, eliminating the need for UEs to perform complex sub-band switching operations. The UEs simply follow the network's configuration and remain on their assigned sub-bands, reducing operational complexity while maintaining efficient power usage.
Data Source
AI summary
Partial bandwidth radio transmission method and device, base station and user equipment are provided. The method includes: configuring a first common control channel transmitted on an anchor sub-band; configuring at least one sub-band other than anchor sub-bands, and a second common control channel transmitted on the at least one sub-band; scheduling at least one partial bandwidth UE to the at least one sub-band, and transmitting configuration of the second common control channel and the at least one sub-band to the at least one partial bandwidth UE; and obtaining a transmission time of a synchronization signal block in the anchor sub-band, and transmitting the second common control channel to the at least one sub-band based on the transmission time, wherein the second common control channel includes a reference signal for demodulation. UE can receive and transmit data using partial bandwidth among a relatively large system bandwidth, which improves system efficiency.