Initial Uplink Resource Scheduling After Cell Switch Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring initial uplink transmissions after a cell switch, particularly in scenarios where connections are interrupted, leading to increased latency and reduced reliability due to the lack of mechanisms for determining resource allocations and random access occasions.
Innovation Solution
A framework is provided for scheduling resources for initial uplink messages after handover events, where a first network node receives information and a command via a first cell to transmit an initial uplink message via a second cell, utilizing resource allocations indicated in a cell switch command message or a control message to activate the transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional random access procedures are used after cell switch, then devices can reestablish connection, but latency increases and reliability decreases due to lack of pre-configured resource allocations
Solution Approach 1:
The network node pre-configures uplink resource allocations and random access occasions before the cell switch occurs. When handover is triggered, the device immediately uses these pre-configured resources to transmit the initial uplink message, eliminating the need for resource allocation negotiations and reducing handover latency while ensuring reliable connection reestablishment.
2Productivity
If pre-configured resource allocations are implemented for initial uplink transmissions after handover, then latency is reduced and reliability is improved, but system complexity increases due to additional configuration management
Solution Approach 1:
The network node acts as an intermediary by providing a dedicated information structure that carries both the handover command and the pre-configured resource allocation parameters. This intermediary mechanism efficiently transfers necessary configuration data from the source to the target cell, enabling fast handover without requiring complex device-side resource management logic.
3Speed
If resource allocations are indicated in cell switch command messages, then initial uplink transmission timing is improved, but message size and processing overhead increase
Solution Approach 1:
The patent modifies the existing cell switch command message structure by incorporating specific parameters for resource allocation (such as time resources, frequency resources, and random access occasion indicators). This parameter enhancement enables the message to carry sufficient information for immediate uplink transmission without requiring separate signaling exchanges, thus improving speed while controlling message size through efficient parameter encoding.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first network node may receive information via a first cell. The information may indicate a resource allocation for transmission of an initial uplink message via a second cell. The initial uplink message is a first uplink transmission scheduled to occur between the first network node and a second network node after a handover of the first network node from the first cell to the second cell. The first network node may receive a command via the first cell. The command may trigger the handover of the first network node from the first cell to the second cell. In response to the command message, the first network node may transmit the initial uplink message via the second cell.