Anchor Resource Block Signaling for Multi-PRB NB-IoT Access
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing multiple physical resource blocks (PRBs) for narrowband communications, particularly in supporting the increasing demand for mobile broadband access and Internet-of-Things (IoT) devices, where existing technologies struggle to optimize resource allocation and interference management in heterogeneous networks.
Innovation Solution
The method involves a user equipment (UE) performing a cell search based on signals in an anchor resource block (RB) and determining the location of additional RBs for narrowband communications, with the base station (BS) signaling the availability of these RBs, allowing for communication using either the anchor RB or additional RBs, thereby optimizing resource utilization and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple physical resource blocks are allocated for narrowband communications, then communication capacity and coverage are improved, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The patent segments the narrowband communication resources by designating one resource block as an anchor RB and others as additional RBs. The anchor RB contains essential signaling information (including indications of additional RB locations), while additional RBs are used for data transmission. This segmentation simplifies resource allocation management by providing a hierarchical structure where the anchor RB serves as a reference point for locating and managing multiple additional RBs, thereby improving communication capacity without proportionally increasing allocation complexity
Solution Approach 2:
The anchor RB transmits preliminary signaling information that indicates the locations of additional RBs before actual data transmission occurs. This preliminary action allows the UE to pre-determine the resource block structure and prepare for efficient data reception, reducing the complexity of real-time resource allocation and interference management while maintaining high communication capacity
2Reliability
If multiple resource blocks are used for narrowband communications, then data transmission reliability is improved, but interference management becomes more difficult
Solution Approach 1:
The anchor RB acts as an intermediary that coordinates the use of multiple additional RBs. By concentrating control signaling and location information in the anchor RB, the system enables coherent management of multiple RBs, allowing the UE to reliably identify and use the appropriate RBs for data transmission while the base station can effectively manage interference across all allocated RBs through centralized control signaling
3Productivity
If dynamic resource allocation is implemented, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic resource allocation where the base station can flexibly assign additional RBs to UEs based on current network conditions and traffic demands. The anchor RB dynamically indicates which additional RBs are available and their locations, allowing the system to adapt resource allocation in real-time. This dynamic approach improves communication efficiency by optimizing resource usage while maintaining manageable system complexity through the structured anchor RB framework that guides the dynamic allocation process
Data Source
AI summary
Aspects of the present disclosure provide techniques and apparatus for multiple physical resource block (PRB) operations for narrowband (NB) systems, such as NB internet-of-things (IoT). In one aspect, a method is provided which may be performed by a wireless device such as a user equipment (UE), which may be an NB-IoT device. The method generally includes performing a cell search based on one or more signals received in an anchor RB within a set of RBs available for narrowband communications with a base station (BS); determining a location of at least one additional RB available for the narrowband communications with the BS based on an indication received in the anchor RB; and performing narrowband communications with the BS using at least one of: the anchor RB or the at least one additional resource block.