Configured Uplink Grant Adaptation for Low-Latency Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio resource allocation methods for low-latency high-rate applications like XR and cloud gaming are inefficient, leading to wasted resources or insufficient allocations, and often result in increased signaling overhead.
Innovation Solution
Adaptive resource allocation methods that allow dynamic adjustment of uplink resources based on actual data size, including the use of initial configured grants, dynamic grants for additional slots, and time-domain resource allocation lists with activation/deactivation windows to minimize signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed initial configured grant is allocated for uplink transmission, then resource allocation is simplified and signaling overhead is reduced, but resource utilization becomes inefficient when data size varies
Solution Approach 1:
The patent implements dynamic resource allocation by allowing the UE to request additional uplink slots through buffering indicator signaling when the initial configured grant is insufficient. The gNB can then dynamically allocate additional slots based on actual data size, transforming the static resource allocation into a dynamic system that adapts to varying data requirements.
Solution Approach 2:
The patent changes the resource allocation parameters from fixed to variable by introducing a mechanism where the number of uplink slots can be adjusted based on data size. The buffering indicator signaling enables the system to modify the allocated resource parameters (number of slots) according to actual transmission needs, resolving the contradiction between fixed allocation simplicity and efficient resource utilization.
2Reliability
If additional uplink slots are allocated to ensure sufficient resource capacity, then resource sufficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by allocating resources in a staged manner: first an initial configured grant is provided, and only if needed, additional slots are allocated through dynamic requests. This avoids allocating excessive resources upfront while ensuring sufficiency when required, reducing overall signaling overhead compared to always allocating maximum resources.
Solution Approach 2:
The UE autonomously determines when additional resources are needed by monitoring its own data buffer status and initiates requests using buffering indicator signaling. This self-service mechanism reduces the need for continuous network-controlled resource allocation signaling, thereby reducing overhead while maintaining resource sufficiency.
3Productivity
If dynamic resource adjustment is implemented to match actual data size, then resource utilization efficiency is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: initial configured grant allocation, data transmission, buffering status monitoring, and conditional additional slot request. This segmentation allows the system to achieve dynamic resource adjustment through a series of simple, manageable steps rather than a complex monolithic system, improving resource utilization while controlling complexity.
Data Source
AI summary
Methods and devices for resource allocation in low-latency high-rate applications. In one embodiment a method (700, 800) is performed in a user equipment, UE (401, 402). The method comprising: receiving (710, 810) a configuration for an initial configured grant for uplink transmission on periodic transmission resources comprising at least one uplink slot; and transmitting (720) data on at least one uplink slot of the initial configured grant, wherein the uplink resource allocation to the UE is dynamically adaptable based at least in part on the initial configured grant being insufficient for uplink transmission or the actual data size for transmission being smaller than the initial configured grant.