Shared Grant-Free Resource Pool for Wireless Handover Latency
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Solution Overview
Problem
Current wireless telecommunications systems face challenges in efficiently supporting low latency and high reliability data transfers, particularly during handover processes between network access nodes, which can lead to delays and inefficiencies in uplink data transmission.
Innovation Solution
Implementing a shared grant-free resource pool common to multiple network access nodes, allowing terminal devices to transmit uplink data using resources selected from this pool during handover procedures, and configuring different sets of radio resources for use within and between communication cells to manage handover efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional handover procedures are used where terminal devices switch between network access nodes, then connection management is simplified, but transmission interruptions and delays occur during handover
Solution Approach 1:
The terminal device is configured with a pool of grant-free uplink transmission resources that are prepared in advance and can be used by multiple network access nodes. This preliminary configuration allows the device to immediately transmit uplink data during handover without waiting for new resource allocation, thereby reducing handover delay while maintaining manageable complexity through resource pre-allocation
Solution Approach 2:
The grant-free uplink transmission resources are designed to be shared universally among multiple network access nodes (both source and target nodes). This multi-functionality allows the same resource pool to serve different nodes during handover, eliminating the need for separate resource configurations and reducing both handover interruption time and system complexity
2Ease of manufacture
If dedicated grant-free resources are allocated to each network access node, then resource allocation is straightforward, but resource usage efficiency decreases during handover
Solution Approach 1:
The patent merges the grant-free uplink transmission resources of the source network access node and target network access node into a single shared pool. This combination allows terminal devices to efficiently utilize resources during handover without requiring separate dedicated allocations, thereby improving resource usage efficiency while maintaining allocation simplicity through unified resource management
Solution Approach 2:
The shared resource pool is designed to serve multiple network access nodes simultaneously, making the resources universal rather than node-specific. This universality enables seamless resource utilization during handover, improving productivity while keeping the allocation mechanism simple through a single shared configuration rather than multiple dedicated allocations
3Reliability
If terminal devices maintain connection to multiple network access nodes simultaneously, then uplink transmission continuity is improved, but system complexity increases
Solution Approach 1:
The terminal device autonomously selects resources from the shared grant-free pool and performs uplink transmission without requiring complex coordination with multiple network access nodes. This self-service approach maintains uplink transmission continuity through multi-node connectivity while minimizing device complexity by eliminating the need for sophisticated inter-node coordination protocols
Solution Approach 2:
The shared grant-free resource pool acts as an intermediary mechanism that enables simultaneous connection to multiple network access nodes without requiring direct complex interaction between the nodes and the terminal device. This intermediary structure simplifies the connection management by providing a standardized resource access interface that abstracts away the complexity of multi-node coordination
Data Source
AI summary
A method including: establishing a first set of radio resources available for use by a terminal device for transmitting uplink data to a first network access node; establishing a shared set of radio resources available for use by the terminal device for transmitting uplink data to the first network access node and a second network access node; determining uplink data has become available for transmission; selecting radio resources to use for transmitting the uplink data from within the shared set of radio resources if it is determined the terminal device is in a boundary region between a first communication cell and a second communication cell; and selecting radio resources to use for transmitting the uplink data from within the first set of radio resources if it is determined the terminal device is within the first communication cell and not in the boundary region.