Subband Resource Determination for Low-Complexity User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Low-complexity user equipment (UE) in communication systems can only send or receive data within an operating bandwidth less than the carrier bandwidth, impeding communication with the base station due to unknown bandwidth usage.
Innovation Solution
A method and apparatus for determining a subband resource, where UE acquires and determines subband resource information to transmit data and control information, using particular frequency information, offset parameters, and signaling to identify the correct frequency bandwidth for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If low-complexity UE operates within a reduced operating bandwidth to reduce cost and complexity, then UE cost and complexity are reduced, but the UE cannot determine which frequency resources are allocated for data transmission, impeding communication
Solution Approach 1:
The patent divides the carrier bandwidth into multiple subbands, where each subband represents a portion of the frequency spectrum. The base station indicates which specific subbands are allocated for data transmission to the low-complexity UE. This segmentation allows the UE to focus processing only on the allocated subbands rather than the entire carrier bandwidth, reducing complexity while maintaining communication capability.
Solution Approach 2:
The patent applies local quality by providing differentiated information treatment for different frequency regions. Instead of requiring the UE to process the entire carrier bandwidth uniformly, the base station indicates specific subbands (local frequency regions) that contain allocated resources. The UE then applies its processing resources locally to these indicated subbands, reducing overall complexity while maintaining communication effectiveness.
2Device complexity
If low-complexity UE uses a narrow operating bandwidth to reduce cost, then UE cost is reduced, but the UE cannot identify the bandwidth used for data transmission, causing communication impairment
Solution Approach 1:
The base station performs preliminary action by indicating the allocated subbands to the low-complexity UE before actual data transmission occurs. This advance indication allows the UE to pre-configure its receiver to monitor only the specified subbands, making communication operation easier despite the UE's narrow operating bandwidth and reduced complexity.
3Reliability
If the UE monitors the entire carrier bandwidth to ensure it receives all allocated data, then communication reliability is improved, but the UE complexity and power consumption increase significantly
Solution Approach 1:
The patent segments the carrier bandwidth into multiple subbands and has the base station indicate which specific subbands contain allocated resources. The UE then monitors only these indicated subbands rather than the entire carrier bandwidth. This segmentation maintains communication reliability by ensuring the UE monitors all allocated resources while reducing complexity by excluding unallocated frequency regions from monitoring.
Solution Approach 2:
The patent applies partial action by having the UE monitor only a subset of the total carrier bandwidth - specifically, only the subbands that are indicated as allocated. This partial monitoring approach is sufficient to maintain communication reliability while avoiding the excessive complexity and power consumption that would result from monitoring the entire carrier bandwidth.
Data Source
AI summary
The present invention discloses an apparatus and a method for determining a subband resource and relates to the field of communications network technologies, so as to resolve a problem of how to ensure communication between user equipment and a base station while costs of the UE or complexity of the UE is reduced. In embodiments of the present invention, subband resource information acquired by UE is used to determine a subband resource, so that data and/or control information can be transmitted according to the subband resource. The solutions provided in the embodiments of the present invention are suitable to be used to determine a subband resource.