Multi-Carrier Data Transmission Scheduling via Dynamic Grant Allocation
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Solution Overview
Problem
In multi-carrier data transmission systems, existing control techniques fail to optimize the usage of transmission resources, leading to inefficient data transmission and increased interference, as mobile terminals often select the same carrier, resulting in suboptimal data throughput and resource utilization.
Innovation Solution
A method for controlling data transmissions in multi-carrier networks involves requesting and allocating transmission resources based on granted data rates and classes, prioritizing higher priority data, and dynamically adjusting transmission power and carrier selection to maximize throughput and minimize interference, using a transmitting device and resource granting device that manage data transmissions across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile terminals use simple carrier selection without control, then ease of operation is improved, but transmission resource utilization deteriorates due to too many terminals selecting the same carrier causing high interference
Solution Approach 1:
The system changes the parameter of carrier selection by introducing grant-based control where the network dynamically assigns carriers to terminals based on buffer status and interference conditions, transforming uncontrolled random selection into controlled parameterized selection
Solution Approach 2:
The network uses feedback from terminal buffer status reports and interference measurements to dynamically adjust carrier grants, creating a closed-loop control system that optimizes resource allocation based on real-time conditions
2Adaptability or versatility
If the network issues grants based on happy bit feedback, then adaptability to terminal data needs is improved, but interference control deteriorates when too many terminals are granted on the same carrier
Solution Approach 1:
The system applies local quality control by granting different carriers to different terminals based on their specific buffer status and the current interference condition of each carrier, rather than uniformly granting all terminals the same carrier
Solution Approach 2:
The grant allocation is made dynamic where the network can change which carrier a terminal uses based on real-time buffer status changes and interference conditions, allowing terminals to switch carriers dynamically
3Device complexity
If multiple terminals transmit on the same carrier, then device complexity is reduced, but transmission robustness deteriorates due to increased interference
Solution Approach 1:
The system segments the carrier resources by dividing the available carriers among multiple terminals based on their data needs, so that terminals transmit on different carriers rather than all using the same carrier, thereby reducing interference while maintaining simple terminal operation
Data Source
AI summary
The invention relates to a scheduling of data transmissions in multi-carrier data transmission systems, e.g. multi-carrier W-CDMA systems. A method embodiment of performing one or more data transmissions in a multi-carrier data transmission network (100) comprises, in a transmitting device (102), the steps of requesting transmission resources from a resource granting device (106); receiving, in response to the request (120), one or more transmission grants (gr1-gr3) from the resource granting device (106), wherein each transmission grant (gr1) indicates a data rate (dr1) and a data class (CI1) granted for a specific transmission carrier (Cr1); and initiating one or more transmissions (122-126) of data associated with one or more of the granted data classes on one or more of the granted transmission carriers.