Concatenated Subframe Control Channel Signaling
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Solution Overview
Problem
Current downlink control channel signaling methods in LTE UMTS and UTRA networks face inefficiencies due to fixed sub-frame durations and resource allocation limitations, particularly when dealing with varying packet sizes and diverse channel conditions, leading to sub-optimal resource utilization and increased complexity in scheduling.
Innovation Solution
The implementation of a control channel signaling system that utilizes a bit map with resource allocation fields associated with multiple sub-frames, allowing for flexible resource allocation across concatenated sub-frames, including frequency diverse and non-diverse allocations, to support terminals with different packet sizes and channel conditions, and enabling dynamic assignment of resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed sub-frame durations and resource allocation methods are used, then system simplicity is maintained, but resource allocation efficiency deteriorates due to inability to adapt to varying packet sizes and channel conditions
Solution Approach 1:
The control channel signaling is segmented into multiple resource allocation fields, each associated with a specific sub-frame. This allows independent allocation control for different sub-frames, enabling adaptive resource allocation that matches varying packet sizes and channel conditions without requiring complex overall scheduling mechanisms.
Solution Approach 2:
The system transitions from fixed resource allocation to dynamic allocation by introducing multiple resource allocation fields that can be independently configured for different sub-frames. This enables the resource allocation to adapt dynamically to changing channel conditions and packet size requirements while maintaining systematic control through the bitmap structure.
2Adaptability or versatility
If control information is spread out over multiple sub-frames, then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
Multiple resource allocation fields for different sub-frames are merged into a single control channel signaling message. The bitmap structure combines allocation information for multiple sub-frames into one unified signaling transmission, reducing the number of separate signaling messages needed while maintaining the flexibility of per-sub-frame allocation control.
Solution Approach 2:
The control channel signaling structure is designed to serve multiple functions simultaneously: it provides resource allocation for multiple sub-frames, supports both frequency diverse and non-diverse allocations, and adapts to different packet sizes all within a single signaling message framework, thereby reducing overall signaling overhead.
3Manufacturing precision
If separate coding of control channel signaling is used, then allocation precision is improved, but device complexity increases
Solution Approach 1:
Each resource allocation field is separately coded with precision tailored to its specific sub-frame requirements. This local coding approach allows precise resource allocation for each sub-frame while keeping the coding structure systematic and manageable, avoiding the need for complex joint coding of all sub-frames together.
Data Source
AI summary
A method in a wireless communication device may include receiving a plurality of sub-frames, each sub-frame having time-frequency resource elements, at least one of the sub-frames having a control channel. In some implementations, the plurality of sub-frames forms a continuum of concatenated sub-frames. Each of the plurality of resource allocation fields of the control channel may indicate a resource assignment to the wireless communication device based on a channel quality report, as well as resource assignments in sub-frames of the continuum of concatenated sub-frames. At least one sub-frame of the continuum of concatenated sub-frames may include information indicating that at least some of the resource assignments are frequency diverse.