Low Cost UE Bandwidth Allocation for LTE Interference
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Solution Overview
Problem
Wireless communication networks face interference issues due to differing bandwidth allocations for downlink and uplink transmissions in low-cost user equipment (UE) devices, which degrade performance and require significant standard changes to support narrowband operations without substantial impact on device performance or LTE specifications.
Innovation Solution
Low-cost UEs operate within a smaller bandwidth within the existing wide bandwidth for both downlink and uplink transmissions, with specific configurations for downlink and uplink resources to minimize interference and maintain network performance, including using narrowband channels and restricted resource blocks to reduce costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If narrowband operations are implemented in low-cost UEs, then device cost and power consumption are reduced, but network performance degrades due to interference and resource allocation issues
Solution Approach 1:
The patent segments the network into two distinct operational modes: narrowband mode for low-cost UEs and wideband mode for legacy UEs. This segmentation allows each UE type to operate in its optimized bandwidth without interfering with the other, resolving the contradiction between cost reduction and performance maintenance.
Solution Approach 2:
The patent applies local quality by providing different resource allocation strategies to different UE types. Low-cost UEs receive narrowband resource allocations optimized for their capabilities, while legacy UEs receive wideband allocations optimized for their performance requirements. This localized optimization resolves the contradiction by tailoring resources to specific UE characteristics.
2Device complexity
If narrowband operations are implemented in low-cost UEs, then device complexity is reduced, but standard compatibility requires significant changes to LTE specifications
Solution Approach 1:
The patent introduces dynamic resource allocation where the network can switch between narrowband and wideband configurations based on UE type. This dynamic approach allows the system to adapt to different device complexities without requiring permanent structural changes to the LTE standard, resolving the contradiction between device simplicity and standard compatibility.
Solution Approach 2:
The patent changes key operational parameters (bandwidth, resource block allocation, physical layer configurations) to accommodate narrowband UEs while maintaining overall LTE compatibility. By modifying parameters rather than fundamental architecture, the patent reduces device complexity while preserving standard adaptability.
3Productivity
If different bandwidth allocations are used for downlink and uplink, then resource utilization is optimized, but interference increases and degrades transmission performance
Solution Approach 1:
The patent introduces the network base station as an intermediary that coordinates resource allocation between downlink and uplink. The base station manages bandwidth allocation, resource block assignment, and interference coordination, allowing different bandwidths for DL and UL while mitigating interference through centralized control and scheduling.
Data Source
AI summary
Certain aspects of the present disclosure relate to techniques for assigning resources for low cost user equipments (UEs). A method for wireless communications by a user equipment (UE) is provided. The method generally includes determining a first bandwidth, within a second bandwidth, for resources available for downlink data transmissions, wherein the first bandwidth is greater than the second bandwidth, determining a third bandwidth for resources available for uplink transmissions, wherein a bandwidth for resources available for uplink transmissions is different than the bandwidth for resources available for downlink transmissions, wherein the third bandwidth is greater than the first bandwidth, and communicating with a network using the determined downlink and uplink resources.