TDD Uplink Resource Allocation Field for Flexible Block Assignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LTE systems face limitations in resource allocation flexibility, particularly for bandwidth-reduced low-complexity UE and coverage enhancement UE, where the allocation of resources in the uplink bandwidth is restricted, leading to inefficiencies in resource utilization and spectral efficiency.
Innovation Solution
A resource allocation method in a TDD system that uses a resource allocation field with ⌈log2⌊NRBUL6⌋⌉+5bits to indicate resource allocation in the uplink bandwidth, allowing for two schemes: one indicating a narrowband index and the other a starting resource block and length, enhancing flexibility and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resource allocation is based on narrowband index (first resource allocation scheme), then resource allocation is simplified and compatible with existing DCI format 6-0A, but resource allocation flexibility is greatly limited
Solution Approach 1:
The patent introduces a dynamic resource allocation mechanism where the resource allocation field can operate in two different modes (first scheme for narrowband index, second scheme for direct resource block indication) based on network conditions and UE requirements. This dynamic switching capability allows the system to adapt between simplified allocation and flexible allocation, resolving the contradiction between complexity and versatility.
Solution Approach 2:
The resource allocation field is designed to serve multiple functions: it can indicate narrowband index for legacy compatibility, or it can indicate direct resource block allocation for enhanced flexibility. This multi-functionality allows a single field to address both the need for simplicity and the need for adaptability in different operational scenarios.
2Ease of manufacture
If resource allocation is restricted to narrowband based on uplink resource allocation type 0, then existing DCI format 6-0A can be used, but resource utilization efficiency decreases
Solution Approach 1:
The patent segments the resource allocation approach into two distinct schemes: the first scheme maintains narrowband-based allocation for compatibility, while the second scheme enables direct resource block allocation across the entire uplink bandwidth. This segmentation allows the system to choose the appropriate granularity level (narrowband or full bandwidth) based on traffic requirements, thereby improving resource utilization without sacrificing implementation ease.
3Stability of the object's composition
If the resource allocation field uses fixed bit structure for narrowband index, then DCI format 6-0A compatibility is maintained, but additional states for resource allocation are insufficient
Solution Approach 1:
The patent changes the interpretation parameters of the resource allocation field based on the selected scheme. In the first scheme, the field is interpreted as a narrowband index with fixed bit structure for compatibility. In the second scheme, the same field structure is reinterpreted to indicate direct resource block allocation, effectively increasing the number of allocatable states without changing the physical bit structure, thus maintaining stability while enhancing adaptability.
Data Source
AI summary
Example resource allocation methods and apparatus are described. One example method includes that a terminal device receives downlink control information sent by a network device, where the downlink control information includes a resource allocation field, the resource allocation field includes formula (I)+5 bits. The terminal device determines the first resource indication value, and determines, based on the first resource indication value, a starting resource block allocated in the uplink bandwidth and a length L CRP, s of consecutive resource blocks allocated in the uplink bandwidth, where M≤LCRBs≤6, and M is a positive integer greater than 1. The terminal device sends data on resources corresponding to the starting resource block and the length of the consecutive resource blocks. The methods and the devices provided in the embodiments of this application may be used in a communications system, for example, V2X, V2V, the Internet of Vehicles, MTC, DE-M, M2M, or the Internet of Things.