UCI Bundling Size Determination for PUSCH Transmission Overhead
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink control information (UCI) as bundled transmissions, particularly in low-cost machine-type communication devices, where traditional methods result in high overhead and packet loss due to limited link budget and inefficient resource allocation.
Innovation Solution
The method involves determining separate bundling sizes for physical uplink shared channel (PUSCH) and UCI transmissions, allowing for flexible bundling configurations that optimize resource allocation and reduce overhead by linking or independently setting UCI and PUSCH bundle sizes, and deciding on transmission resources based on overlap and bundling parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bundled transmission methods are used for UCI, then coverage is improved through repeated transmissions, but signaling overhead increases and packet loss occurs due to limited link budget
Solution Approach 1:
The patent segments the bundling configuration into two independent parts: one for PUSCH transmissions and another for UCI transmissions. This allows separate optimization of bundling sizes for data and control information, reducing unnecessary repetitions and signaling overhead while maintaining coverage reliability.
Solution Approach 2:
The patent introduces dynamic and flexible bundling configurations where the UCI bundling size can be independently adjusted from PUSCH bundling size. This dynamic approach allows the system to adapt bundling parameters to actual channel conditions and traffic requirements, avoiding fixed overhead penalties.
2Device complexity
If UCI and PUSCH use the same bundling size, then implementation is simplified, but resource allocation efficiency decreases due to inability to optimize independently
Solution Approach 1:
The patent divides the bundling configuration into separate parameters: one for PUSCH and another for UCI. This segmentation enables independent optimization of resource allocation for data and control information without increasing implementation complexity, as each parameter can be configured separately based on specific requirements.
Solution Approach 2:
The patent changes the parameter structure by introducing independent bundling size parameters for UCI and PUSCH. This allows the system to optimize resource allocation efficiency by adjusting each parameter according to channel conditions, traffic type, and QoS requirements without being constrained by a unified bundling approach.
3Reliability
If bundled transmissions are used for low-cost MTC devices, then coverage enhancement is achieved, but packet loss increases due to limited link budget
Solution Approach 1:
The patent applies segmentation by separating UCI bundling from PUSCH bundling, allowing optimized resource allocation that reduces redundant transmissions. This reduces packet loss by ensuring that control information is transmitted efficiently without being burdened by excessive bundling overhead that consumes limited link budget.
Solution Approach 2:
The patent optimizes packet loss reduction by changing the bundling parameters independently for UCI and PUSCH. This allows the system to allocate appropriate repetition levels based on the specific reliability requirements of control information versus data, maximizing the use of limited link budget and reducing unnecessary packet loss.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques and apparatus that may be applied for sending uplink control information (UCI) as bundled transmissions. According to aspects, a UE may determine a first bundling size for transmitting a PUSCH, determine a second bundling size for transmitting the UCI, and transmit the UCI and the PUSCH as bundled transmissions according to the first and second bundling sizes. The BS may receive the UCI and the PUSCH as bundled transmissions from the UE according to the determined first and second bundling sizes.