Wireless Resource Allocation for Narrowband Subcarriers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of improving resource allocation in coverage enhancement modes to enhance resource utilization in wireless communications systems, particularly in scenarios involving terminal devices with varying coverage enhancement levels, is not adequately addressed by existing technologies.
Innovation Solution
A method and device for resource allocation in coverage enhancement modes that utilize downlink control information to allocate resource blocks or subcarrier resources efficiently, allowing for finer granularity in resource allocation, such as allocating fewer than 12 subcarriers, thereby optimizing spectrum utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource allocation is performed at the resource block level (12 subcarriers), then resource allocation is simple, but spectrum utilization efficiency is low
Solution Approach 1:
The resource block is segmented into smaller subcarrier units. Instead of allocating resources in fixed blocks of 12 subcarriers, the patent enables allocation at the individual subcarrier level or in flexible groups of subcarriers. This segmentation allows the network device to allocate exactly the number of subcarriers needed for each terminal device, avoiding waste of remaining subcarriers in a resource block and thereby improving spectrum utilization efficiency.
2Reliability
If coverage enhancement mode B is used for terminals with larger coverage enhancement degree, then coverage is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms that adapt to different coverage enhancement modes. For CE mode B terminals, the system dynamically determines the number of subcarriers needed based on channel conditions and terminal requirements, rather than using fixed resource block allocations. This dynamic approach allows efficient utilization of available resources while providing the enhanced coverage needed for challenging propagation conditions.
Solution Approach 2:
The patent changes the resource allocation parameter from fixed resource blocks to flexible subcarrier counts. By allowing the number of allocated subcarriers to vary based on terminal-specific requirements and channel conditions, the system can optimize both coverage enhancement and resource utilization. The network device can allocate different numbers of subcarriers to different terminals in CE mode B, matching resource allocation to actual needs.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An information transmission method and a device are disclosed. A terminal device receives downlink control information sent by a network device, where the downlink control information includes a resource allocation field, and the resource allocation field includes (I) high-order bits and M low-order bits; and when the resource allocation field is used to indicate an allocated resource block, L bit states in bit states of the M low-order bits can be used to indicate allocation of resource blocks in a narrowband, and a quantity of resource blocks indicated by each of the L bit states is greater than or equal to 1; or when the resource allocation field is used to indicate an allocated subcarrier resource, K bit states in bit states of the M bits can be used to indicate allocation of subcarrier resources, and a quantity of subcarriers indicated by each of the K bit states is less than 12; and the terminal device determines, based on the resource allocation field, whether the resource block or the subcarrier resource is allocated, and sends information on the allocated resource block or the subcarrier resource. The method and the device provided in embodiments of this application may be applied to a communications system such as a V2X communications system, an LTE-V communications system, a V2V communications system, an internet of vehicles communications system, an MTC communications system, an IoT communications system, an LTE-M communications system, an M2M communications system, or an internet of things communications system.