Uplink Resource Feedback for Reallocating Unused Grant Blocks
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies due to unused uplink resources, particularly in periodic uplink transmissions, which can decrease communication efficiency between user equipment (UE) and network entities, especially in scenarios involving large data transmissions and sub-band full duplex operations.
Innovation Solution
The UE generates a resource map indicating used and unused uplink resources by receiving control signaling for symbol groups and resource block groups, transmitting feedback messages to the network entity, allowing reallocation of unused resources for downlink or inter-UE communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If periodic uplink resources are allocated to UE using configured grants, then uplink transmission capability is improved, but resource utilization efficiency deteriorates due to unused resources
Solution Approach 1:
The UE sends feedback information to the network entity indicating whether the configured grant resources are used or unused. This feedback mechanism enables the network entity to identify unused resources and reallocate them, thereby improving resource utilization efficiency while maintaining the uplink transmission capability provided by configured grants
Solution Approach 2:
The system transitions from static resource allocation to dynamic resource management by allowing real-time feedback and reallocation. The network entity can dynamically adjust resource allocation based on actual usage patterns, converting fixed configured grants into flexible, adaptive resource assignments that optimize both transmission capability and efficiency
2Reliability
If configured grants are used for periodic uplink transmission, then transmission reliability is improved, but system resource efficiency deteriorates due to inability to reallocate unused resources
Solution Approach 1:
The feedback mechanism provides the network entity with information about resource usage status, enabling it to maintain reliable configured grant transmissions while simultaneously identifying opportunities to reallocate unused resources to other UEs or purposes, thus improving overall system resource efficiency
Solution Approach 2:
The configured grant resources serve multiple functions: they provide reliable periodic uplink transmission for designated UEs and simultaneously represent potential resources that can be reallocated to other UEs or uses when unused, as indicated by feedback. This multi-functionality resolves the contradiction between reliability and resource efficiency
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment may receive control signaling that includes a first parameter that indicates a first quantity of symbol groups and a second parameter that indicates a second quantity of resource block groups. The UE may receive a grant allocating periodic resources for transmitting a set of transport blocks. The UE may transmit a feedback message indicating whether resources of the grant are unused by the UE to transmit one or more transport blocks of the set of transport blocks, the feedback message generated according with the first parameter and the second parameter of the control signaling. The feedback message may include a set of values, where each value may correspond to a respective symbol group and resource group (e.g., a resource group pair).