LTE Resource Allocation for Multi-Narrowband RB Assignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, existing resource allocation methods are limited in allocating resources beyond a single narrowband, restricting the number of resource blocks (RBs) that can be allocated to user equipment, especially as bandwidth requirements vary with the Internet of Things and intelligent terminals.
Innovation Solution
A method for allocating transmission resources greater than one narrowband by using downlink control information (DCI) with specific field configurations and calculations to determine resource indicator values, allowing for increased allocation of RBs based on predefined mapping relationships and intermediate indicator values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a base station allocates a specific NB and RB in a system bandwidth using existing resource allocation methods, then the resource allocation is simple and follows standard procedures, but the quantity of RBs allocated to the terminal is limited and cannot exceed one NB
Solution Approach 1:
The system bandwidth is divided into multiple narrowbands (NBs), and the resource allocation is segmented into two levels: first selecting an NB index from multiple NBs, then selecting RBs within the selected NB. This segmentation allows allocation of RBs across multiple NBs while maintaining manageable complexity through hierarchical structure.
Solution Approach 2:
The resource allocation structure uses nested indication: the first resource indication information (NB index) selects a narrowband, and the second resource indication information (RB allocation) selects resource blocks within that narrowband. This nested structure enables multi-NB allocation by combining the selection of parent NB with child RBs, allowing terminals to access resources across multiple NBs while keeping the allocation mechanism organized and systematic.
2Adaptability or versatility
If the bandwidth supported by a terminal is extended to cover multiple NBs (e.g., 5 MHz or 20 MHz), then the terminal can access more resources, but the existing resource allocation method cannot allocate resources beyond one NB
Solution Approach 1:
The resource allocation mechanism is designed to be universal by supporting both single-NB and multi-NB allocation scenarios. The first resource indication information field enables the mechanism to indicate multiple NBs, making the allocation system adaptable to terminals with different bandwidth capabilities (BL and non- BL terminals) without requiring separate allocation procedures for each case.
Solution Approach 2:
The resource allocation is extended from a single-dimension (RBs within one NB) to a two-dimension structure by introducing NB index selection as an additional layer. The first resource indication information selects the NB dimension, and the second resource indication information selects the RB dimension within the selected NB, enabling terminals to access resources across multiple NBs while maintaining a systematic allocation approach.
3Productivity
If resource allocation is limited to one NB, then the allocation process is straightforward and computationally simple, but the quantity of RBs that can be allocated is restricted
Solution Approach 1:
The base station performs preliminary selection of the NB index using the first resource indication information before allocating specific RBs within the selected NB. This preliminary action of selecting the parent NB first enables subsequent RB allocation to span multiple NBs, increasing the total quantity of allocatable RBs while maintaining efficient two-stage allocation process that preserves productivity.
Data Source
AI summary
Embodiments of the present invention disclose a resource allocation method, a first node, and a second node. The method includes the following steps: A first node receives downlink control information (DCI) from a second node, where the DCI includes resource indication information, and the resource indication information is used to indicate a transmission resource allocation manner; the first node determines a first resource allocation manner based on the resource indication information, where the first resource allocation manner is used to allocate a transmission resource greater than one narrowband; the first node determines an allocated transmission resource based on the first resource allocation manner and the resource indication information; and the first node transmits data by using the allocated transmission resource.