Carrier Segmentation for NB-IoT Control and Data Separation
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Solution Overview
Problem
The increasing number of user equipment (UEs) in wireless communication systems necessitates a more efficient method for transmitting and receiving data and control information using limited radio resources, as the available resources are limited and traditional methods are inadequate to handle the increased demand.
Innovation Solution
The method involves transmitting carrier information about a second carrier on a first carrier, where the first carrier includes synchronization signals and a physical broadcast channel, and the second carrier does not, allowing for efficient data transmission on the second carrier, particularly in a narrowband Internet of Things (NB-IoT) system, using specific resource blocks within a guard band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation technology and MIMO technology are used to increase data throughput, then data transmission capacity is improved, but device complexity and system complexity increase
Solution Approach 1:
The patent segments the frequency band into multiple carriers, with the first carrier dedicated to control information (PBCH, synchronization signals) and the second carrier dedicated to data transmission. This segmentation allows independent optimization of control and data channels, improving overall system efficiency without requiring complex integrated processing.
Solution Approach 2:
The first carrier acts as an intermediary that carries control information necessary for the UE to access and utilize the second carrier for data transmission. By separating control and data functions across different carriers, the system reduces the complexity burden on individual carriers while maintaining high overall throughput.
2Productivity
If the number of user equipments (UEs) increases in a prescribed resource region, then network coverage and service capacity are improved, but the amount of control information that the base station must transmit increases, leading to resource exhaustion
Solution Approach 1:
The patent moves control information transmission to a different frequency dimension (first carrier) separate from the data transmission carrier (second carrier). This dimensional separation allows control information to be transmitted independently without consuming data transmission resources, enabling the system to support more UEs without exhausting control channel resources.
3Device complexity
If traditional single-carrier methods are used for data transmission, then system simplicity is maintained, but data throughput and transmission efficiency are limited
Solution Approach 1:
The patent creates a universal framework where the first carrier handles control functions (PBCH, synchronization) while the second carrier handles data transmission, allowing the system to achieve multi-functionality without requiring completely separate systems. This universal carrier structure can support both simple and complex transmission scenarios.
Data Source
AI summary
A method and an apparatus for transmitting/receiving a downlink signal in a wireless communication system are provided. Carrier information about a second carrier that is different from a first carrier can be transmitted on the first carrier. Downlink data for UE can be transmitted on the second carrier based on the carrier information. The first carrier is a carrier having a synchronisation signal and a physical broadcast channel, and the second carrier can be a carrier without any synchronisation signals or physical broadcast channels. The first carrier can be operated on a single resource block in a guard frequency that is used in the wireless communication system.