Configured Grant Uplink Bitmaps for Dynamic Resource Reallocation
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, the variability in packet sizes for uplink transmissions, such as in extended reality (XR) applications, leads to inefficiencies due to reserved resources not being used, resulting in unused capacity and increased signaling overhead.
Innovation Solution
Implementing dynamic indication mechanisms, such as CG-UCI or dedicated UCI, to allow user equipment (UE) to indicate unused configured grant (CG) uplink resources, enabling the network to reallocate these resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grant uplink resources are reserved for user equipment, then uplink transmission capacity is improved, but resource utilization efficiency deteriorates due to unused capacity when packet sizes vary
Solution Approach 1:
The patent implements dynamic indication mechanisms where the UE sends bitmaps to indicate which configured grant resources will be used or skipped. This allows the resource allocation to adapt dynamically to actual packet size requirements, transforming static reserved resources into dynamically adjustable allocations that match actual transmission needs.
Solution Approach 2:
The system changes the parameter of resource utilization by introducing dynamic indication bitmaps that modify how configured grant resources are used. Based on the indicated parameters in the bitmap, the network can adjust resource allocation, enabling the same configured resources to serve different packet sizes efficiently.
2Loss of energy
If dynamic indication mechanisms are implemented to indicate unused resources, then resource utilization is improved, but signaling overhead increases
Solution Approach 1:
Instead of transmitting detailed resource allocation messages for each transmission, the system uses compact bitmap copies that represent resource usage patterns. The bitmap serves as a simplified representation that conveys essential information about which resources are used or skipped, reducing signaling complexity while maintaining resource utilization efficiency.
3Adaptability or versatility
If configured grant resources are allocated for variable packet sizes, then transmission flexibility is improved, but latency increases due to unused resources requiring reallocation
Solution Approach 1:
The system performs preliminary action by pre-configuring grant resources and providing dynamic indication mechanisms in advance. The UE indicates upcoming resource usage patterns before actual transmission occurs, allowing the network to prepare and reallocate resources proactively, thereby reducing latency while maintaining flexibility for variable packet sizes.
Data Source
AI summary
There is provided an apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to receive, from an access node, an information indicating configured grant uplink resources for performing uplink data transmission to the access node; receive, from the access node, configuration information indicating a number of bits; transmit, to the access node, a dynamic indication comprising a bitmap of a length specified by the number of bits indicated by the configuration information, said bitmap indicating subsequent configured grant uplink resources which the apparatus will not use as unused configured uplink grant resources; and transmit, to the access node, a new dynamic indication, wherein the new dynamic indication cannot claim back unused configured grant uplink resources.