Dynamic Uplink Resource Scheduling for Mixed-Capability LTE Terminals
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Solution Overview
Problem
The LTE system struggles to accommodate terminals with varying capabilities, leading to issues in receiving synchronization and broadcast channels, as it lacks the ability to schedule single or multiple subcarriers efficiently, affecting normal communication.
Innovation Solution
A data transmission method where a base station sends system information indicating type 1 or type 2 uplink resources, allowing terminals with different capabilities to utilize appropriate resources for uplink and downlink data transmission, enhancing the LTE system's utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE system uses a fixed scheduling granularity of one PRB (180 kHz), then the system structure remains simple and standardized, but it cannot accommodate terminals with varying capabilities (type 1, type 2, type 3) and cannot receive synchronization or broadcast channels
Solution Approach 1:
The patent introduces dynamic scheduling granularity that can adapt to different terminal capabilities. The base station can flexibly allocate resources at different granularities (one subcarrier, one PRB, or multiple PRBs) depending on the terminal type, transforming the fixed PRB-based scheduling into a dynamic system that adjusts to terminal requirements
Solution Approach 2:
The patent changes the scheduling parameter (granularity) from a fixed value (one PRB) to a variable value that can be one subcarrier, one PRB, or multiple PRBs. This parameter change enables the system to accommodate different terminal capabilities while maintaining a standardized base structure
2Adaptability or versatility
If the LTE system supports multiple terminal capabilities with different subcarrier spacings, then terminal versatility improves, but the system cannot currently receive synchronization or broadcast channels due to lack of appropriate resource allocation
Solution Approach 1:
The patent segments the uplink resource allocation into different types (type 1, type 2, type 3) corresponding to different terminal capabilities. Each terminal type receives appropriately segmented resource allocations matching its capabilities, enabling reliable synchronization and broadcast channel reception for each terminal category
3Productivity
If the system allocates resources in fixed PRB units, then resource management is simplified, but communication efficiency decreases for terminals that could use finer or different resource granularities
Solution Approach 1:
The patent implements dynamic resource allocation where the base station can select different granularities (one subcarrier, one PRB, or multiple PRBs) based on terminal capability and communication requirements. This dynamic approach improves communication efficiency by matching resource allocation to actual needs while maintaining manageable complexity through standardized allocation procedures
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method and an apparatus, and relate to the field of communications technologies. The method includes: obtaining, by a terminal, first indication information of an uplink resource used for sending uplink data or uplink control information. The first indication information of the uplink resource includes information used to indicate whether the uplink resource is a type 1 uplink resource or a type 2 uplink resource. The type 1 uplink resource includes at least one subcarrier in a frequency domain, where when a subcarrier quantity is greater than or equal to 2, subcarriers are orthogonal to each other, and a subcarrier spacing is 3.75 kHz; or the type 1 uplink resource includes at least one sub-channel in a frequency domain, where a width of each sub-channel is 3.75 kHz. The type 2 uplink resource includes at least one subcarrier in the frequency domain, where when a subcarrier quantity is greater than or equal to 2, subcarriers are orthogonal to each other, and a subcarrier spacing is 15 kHz. The first indication information of the uplink resource further includes time-domain information and/or frequency-domain information of the type 1 uplink resource or the type 2 uplink resource.