LTE Wireless Device Transport Format Control Parameter Indication
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Solution Overview
Problem
In LTE wireless communication networks, contention-based transmission methods often result in increased latency and control signaling overhead due to the need for robust transport format control parameters, which can lead to inefficient data transfer rates, especially for small data transmissions.
Innovation Solution
A method where a wireless device determines transport format control parameters and notifies a network node, allowing for efficient communication by optimizing data transfer rates and reducing latency through improved resource allocation and signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If contention-based transmission is used to reduce latency and control signaling overhead, then transmission speed improves, but data transfer efficiency deteriorates due to increased collision risk and robust transport format requirements
Solution Approach 1:
The transport format control parameters are made dynamic and UE-specific rather than static and cell-wide. Each UE can independently select parameters such as transport block size, modulation scheme, and coding rate based on its own channel conditions and data characteristics, enabling optimal adaptation without affecting other UEs
Solution Approach 2:
Different transport format control parameters are applied locally to each UE based on its specific requirements and channel conditions. The network node configures UE-specific parameter sets that are tailored to individual user needs, rather than using a uniform robust configuration for all UEs in the cell
2Reliability
If robust transport format control parameters are used for contention-based access, then transmission reliability improves, but signaling overhead increases due to parameter indication requirements
Solution Approach 1:
Instead of indicating all possible transport format parameters, the system only indicates the necessary subset of parameters that differ from defaults or previously configured values. The network node selectively signals parameter changes rather than transmitting complete parameter sets, reducing overhead while maintaining reliability
Solution Approach 2:
The transport format control parameter indication mechanism serves multiple functions: it enables reliable transmission by conveying necessary format information, allows for UE-specific optimization, and reduces signaling overhead through selective indication. The same parameter indication structure handles both robustness requirements and efficiency optimizations
3Productivity
If minimal grant is used for random access reply, then resource allocation efficiency improves, but data transfer capability deteriorates due to insufficient grant size for user plane data
Solution Approach 1:
The grant size is made dynamic rather than fixed at minimal levels. The network node can allocate larger grants when user plane data needs to be transmitted, adapting the resource allocation to the actual data requirements while maintaining efficiency for smaller transmissions
Solution Approach 2:
The transmission process is segmented into phases: initial random access with minimal grant for control signaling, followed by subsequent transmissions with larger grants for user plane data. This segmentation allows efficient resource usage at each stage while enabling full data transfer capability when needed
Data Source
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AI summary
There is provided a method performed by a wireless device for supporting transmission to a network node in a wireless communication network according to an embodiment. The method is adapted for a wireless network based on LTE, wherein the wireless device is allowed to transmit on a set of Resource Elements, REs, allocated for transmission to the network node. The method comprises the step (S1) of determining at least one transport format control parameter for at least a first part of the set of REs allocated for transmission. The method further comprises the step (S2) of transmitting, to the network node, an indication representing the at least one determined transport format control parameter on at least a second part of the set of REs allocated for transmission to notify the network node of the determined transport format control parameter(s).