Uplink Resource Allocation via Dynamic Bundle Size
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Solution Overview
Problem
Current signalling channels in mobile telecommunication networks, such as UMTS, are inefficient for dynamically adjusting the degree of bundling in resource allocation to match changing packet sizes and radio channel conditions, leading to high control signalling overhead.
Innovation Solution
A method where at least one bit in the resource allocation message is used to indicate a bundle of resource blocks across the time domain, allowing dynamic adjustment of bundle size based on available data rate and packet size, without increasing the size of control messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TTI bundling is configured semi-statically by higher layer signalling, then resource allocation efficiency is improved for specific applications like VoIP, but adaptability to changing packet sizes and radio channel conditions deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the bundle size to be changed dynamically through the uplink scheduling grant message. The bundle size indicator field allows the base station to adjust the number of subframes in the TTI bundle on a per-packet basis, transforming the static configuration into a dynamic parameter that adapts to varying packet sizes and channel conditions.
Solution Approach 2:
The patent changes the parameter of bundle size from a semi-static higher-layer configuration to a dynamically controllable parameter through the uplink scheduling grant. By introducing a bundle size indicator field in the grant message, the system can adjust this parameter in real-time based on current transmission needs and channel conditions.
2Adaptability or versatility
If multiple transmissions are sent over successive subframes without bundling, then adaptability to changing conditions is improved, but control signalling overhead increases due to multiple grant messages and ACK/NACK responses
Solution Approach 1:
The patent merges multiple separate control messages into a single uplink scheduling grant by incorporating the bundle size indicator field within it. This consolidation allows the system to manage multiple transmissions over successive subframes while reducing the number of separate grant messages and ACK/NACK responses that would otherwise be required.
3Reliability
If the bundle size is increased for cell edge users with limited transmit power, then data transmission reliability is improved, but the flexibility to optimize for different user conditions deteriorates
Solution Approach 1:
The patent applies local quality by allowing different bundle sizes to be allocated to different users or different transmissions based on their specific conditions. The base station can assign larger bundle sizes to cell edge users with power constraints while maintaining smaller or no bundling for users with better channel conditions, optimizing resource allocation locally for each user's needs.
Data Source
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AI summary
The present invention relates to a method for transmitting data from a secondary station to at least one primary station, comprising, at the primary station, transmitting on a signaling channel to the secondary station a resource allocation message allocating resource blocks for transmission of data from the secondary station, said message comprising a field for allocating resources in a first domain, and wherein at least one bit of said field is stolen to allocate resources in a second domain being different from the first domain.