Time Division Multiplexing for Wireless Handover
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Solution Overview
Problem
Current cell handover processes in wireless communication systems face challenges in simultaneously supporting uplink and downlink data transmission between a terminal device and both the source and target base stations, leading to inefficiencies and increased power consumption due to frequent detection of transmission stop signals.
Innovation Solution
Implementing a time division multiplexing mode for data transmission between terminal devices and network devices, allowing for coordinated beam and radio frequency switching to manage data transmission during cell handovers, thereby enabling simultaneous data exchange without the need for continuous signal detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If two sets of PDCP/RLC/MAC/Low Layer stacks are maintained for simultaneous data transmission with source and target base stations, then handover delay is reduced to Oms, but device complexity increases and terminal devices incapable of simultaneous support cannot perform data transmission
Solution Approach 1:
The patent segments the data transmission process by introducing a time division multiplexing mode that divides transmission into distinct time periods. During the first time period, data is transmitted with the source base station; during the second time period, data is transmitted with the target base station. This segmentation allows terminal devices to switch between transmission modes without maintaining two simultaneous stacks, thereby reducing device complexity while maintaining fast handover performance.
2Device complexity
If terminal device performs data transmission with only one base station during cell handover, then device complexity is reduced, but handover efficiency decreases and power consumption increases due to frequent detection of transmission stop signals
Solution Approach 1:
The patent implements periodic action by establishing regular time periods for switching transmission modes. The terminal device alternates between transmitting data with the source base station and the target base station according to predetermined time intervals. This periodic switching eliminates the need for frequent detection of transmission stop signals, thereby improving handover efficiency while keeping device complexity low.
3Adaptability or versatility
If terminal device switches between source and target base station during handover, then simultaneous data transmission is enabled, but detection complexity increases due to frequent signal monitoring requirements
Solution Approach 1:
The patent applies preliminary action by pre-configuring the time division multiplexing mode and predetermined time periods for switching transmission modes before handover occurs. The terminal device and network device agree in advance on when to switch between source and target base stations. This preliminary arrangement eliminates the need for real-time detection and decision-making during handover, thereby reducing detection complexity while enabling simultaneous data transmission capability.
Data Source
AI summary
Disclosed is a data transmission method. The method comprises: a terminal device performing data transmission with a first network device and/or a second network device according to a time division multiplexing mode, the time division multiplexing mode indicating information associated with data transmission performed between the terminal device and the first network device and/or the second network device. Further disclosed are another data transmission method, a terminal device, and a storage medium.