Uplink Resource Allocation in Reduced Transmission Time Interval Configurations
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Solution Overview
Problem
Current methods for allocating uplink radio resources in reduced transmission time interval (RTTI) configurations in EGPRS systems are inefficient, particularly for VoIP applications, as they restrict simultaneous transmission and reception capabilities and do not fully utilize flexible timeslot assignments, leading to limitations in data rate adjustments and resource scheduling.
Innovation Solution
The method employs flexible timeslot assignment with dynamic allocation, allowing uplink and downlink timeslots to be allocated in pairs within a reduced transmission time interval, where a single indication in the downlink directs the mobile device to transmit in a specific uplink timeslot pair, enabling efficient scheduling and resource utilization by monitoring USF in corresponding downlink timeslots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional timeslot allocation methods are used in RTTI configurations, then transmission time interval is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic timeslot allocation where the network can flexibly assign uplink timeslots based on current traffic conditions. The allocation is not fixed but changes dynamically through network control messages, allowing the system to adapt to varying data rates and traffic patterns in RTTI configurations, thereby improving resource utilization while maintaining reduced transmission time intervals
Solution Approach 2:
The patent changes the allocation parameters by allowing flexible assignment of multiple uplink timeslots to a single downlink timeslot. This parameter change enables the system to optimize resource distribution in RTTI mode, where traditional one-to-one mapping is insufficient, thus resolving the contradiction between reduced time intervals and efficient resource usage
2Adaptability or versatility
If flexible timeslot assignment is implemented, then adaptability of resource allocation is improved, but system complexity increases
Solution Approach 1:
The patent introduces a network controller as an intermediary that manages the complex allocation logic. The controller receives traffic information, determines optimal timeslot assignments, and sends allocation commands to mobile stations. This intermediary approach centralizes the complexity in the network infrastructure rather than requiring complex processing in each mobile device, thus improving adaptability while managing system complexity
3Productivity
If multiple uplink timeslots are assigned to a single downlink timeslot, then data throughput is increased, but scheduling difficulty increases
Solution Approach 1:
The patent segments the allocation management into distinct components: traffic assessment, timeslot selection, and command transmission. The network controller divides the complex scheduling task into manageable segments, evaluating traffic conditions separately from allocation decisions, and executing assignments through structured control messages. This segmentation reduces scheduling difficulty while maintaining high throughput capabilities
Data Source
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AI summary
A method of allocating uplink radio resources to a mobile device; wherein uplink and downlink timeslots are allocated; wherein the sum of the allocated uplink timeslots and the allocated downlink timeslots within a predetermined period is less than the total number of assigned time slots and does not exceed a predetermined maximum; wherein the resources are allocated in a reduced transmission time interval configuration; wherein an indication of the uplink timeslot allocation is received from the network in a downlink timeslot, or downlink timeslot pair, directing the mobile device to transmit only in one uplink timeslot pair.