Partial Frequency Domain Transmission for Wireless Uplink
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Solution Overview
Problem
Wireless communication devices face challenges in efficiently managing uplink transmission resources, leading to unnecessary power consumption and inefficient network resource use due to over-provisioning, especially in scenarios with varying frame sizes and mixed reliability traffic.
Innovation Solution
Wireless devices employ a resource adjustment rule to select a subset of frequency domain resources from an uplink grant, allowing for partial frequency domain transmissions, which can be time-invariant or time-variant, and may signal or not signal the used resources, enabling the base station to perform blind detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all frequency domain resources provided by an uplink grant are allocated to a wireless device, then the device has sufficient resources for uplink transmission, but power consumption increases and network resource efficiency decreases due to over-provisioning
Solution Approach 1:
The patent applies partial action by allowing wireless devices to transmit using only a subset of the frequency domain resources allocated in the uplink grant. The device determines the actual transport block size and selects corresponding frequency resources proportionally, avoiding transmission on excess resources. This resolves the contradiction by maintaining reliable transmission on needed resources while avoiding power consumption from using all allocated resources when not required.
2Reliability
If all frequency domain resources provided by an uplink grant are allocated to a wireless device, then the device has sufficient resources for uplink transmission, but network resource efficiency decreases due to over-provisioning
Solution Approach 1:
The patent enables partial resource utilization where devices use only the frequency resources corresponding to their actual data payload size. The base station allocates resources based on maximum possible needs, but devices transmit partially on a subset of these resources when the actual transport block is smaller. This improves network resource efficiency by freeing unused frequency resources for other devices while maintaining transmission reliability on the utilized portion.
3Use of energy by moving object
If a wireless device uses a subset of frequency domain resources from an uplink grant, then power consumption and network resource efficiency improve, but the device complexity increases due to resource selection and coordination requirements
Solution Approach 1:
The patent simplifies the complexity of partial resource usage by providing clear selection rules: the device determines the transport block size, calculates the corresponding frequency resource subset proportionally, and transmits only on those resources. The base station provides blind detection capabilities to handle the variable resource usage. This structured approach reduces implementation complexity compared to arbitrary resource selection while maintaining energy efficiency benefits.
4Productivity
If a wireless device uses a subset of frequency domain resources from an uplink grant, then network resource efficiency improves, but the base station complexity increases due to transmission coordination and blind detection requirements
Solution Approach 1:
The patent implements self-service through blind detection at the base station. Instead of requiring complex coordination signaling with each device about which frequency resources are actually used, the base station autonomously detects the actual resource usage by analyzing the transmitted signal characteristics and determining the transport block size indirectly. This self-detection capability reduces coordination overhead and simplifies the interaction between base station and devices while maintaining high network resource efficiency.
Data Source
AI summary
This disclosure relates to techniques for performing partial frequency domain transmissions in a wireless communication system. A wireless device and a cellular base station may establish a wireless link. The wireless device may receive an uplink grant from the cellular base station. The uplink grant may provide a set of time domain resources and a set of frequency domain resources on which to perform an uplink transmission. The wireless device may select a subset of frequency domain resources from the set of frequency domain resources and perform the uplink transmission using the selected resources.