Uplink Control Resource Allocation for Dynamic TDD Systems
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Solution Overview
Problem
Current LTE technology faces inefficiencies in uplink control resource allocation, particularly due to dynamic grants and pre-allocated fixed resources without knowing the dynamic uplink transmission window length, leading to system inefficiencies.
Innovation Solution
A method where user equipment (UE) is assigned a variable bandwidth resource based on an uplink transmission window length specified by the network entity, with an uplink bandwidth allocation map generated and transmitted semi-statically, allowing UEs to allocate bandwidth dynamically based on the received window length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic grants are transmitted for each uplink control information transmission, then uplink control resource allocation flexibility is improved, but system overhead and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink control resource allocation parameters (such as PUCCH resource indices, power control parameters, and spatial relation information) in advance through RRC signaling or MAC CE. This allows the UE to determine uplink control resources without requiring dynamic grants for each transmission, thereby reducing system overhead while maintaining allocation flexibility through the pre-configured parameter sets.
2Device complexity
If fixed resources are pre-allocated without knowing dynamic uplink transmission window length, then resource allocation simplicity is improved, but system efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the uplink control resource allocation to adapt to varying uplink transmission window lengths. The network entity configures multiple parameter sets corresponding to different window lengths, and the UE selects the appropriate set based on the actual window length. This dynamic adaptation mechanism maintains resource allocation simplicity while improving system efficiency by optimizing resources according to actual transmission needs.
3Productivity
If variable bandwidth resources are allocated based on transmission window length, then resource utilization efficiency is improved, but allocation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing uplink control resource allocation into multiple parameter sets, each corresponding to a specific uplink transmission window length. The network entity configures these segmented parameter sets in advance, and the UE simply selects the appropriate segment based on the current window length. This segmentation approach improves resource utilization efficiency while keeping allocation complexity manageable through the structured parameter set organization.
Data Source
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AI summary
Methods and apparatuses for managing uplink scheduling for one or more user equipment served by a network entity in a wireless communications system are presented. For instance, an example method is presented that includes generating, by the network entity, an uplink bandwidth allocation map, the uplink bandwidth allocation map defining an uplink bandwidth allocation for at least one of the one or more user equipment for at least one of a plurality of uplink transmission window lengths. In addition, the example method includes transmitting the uplink bandwidth allocation map to at least one of the one or more user equipment.