Dynamic Channel Shortening for Wireless DL-UL Switching
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently switching between downlink and uplink transmissions without causing interference or collision, particularly in LTE and NR systems, where dynamic TDD or flexible duplex is desirable but not adequately supported.
Innovation Solution
A method and apparatus that dynamically determine and shorten parts of channels based on their characteristics, such as types, TTI lengths, and coding rates, to prioritize and avoid interference, using techniques like puncturing or rate matching to ensure minimal disruption during DL-UL switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guard period is introduced to avoid collision between downlink reception and uplink transmission, then interference between DL and UL is reduced, but transmission time is lost and system throughput decreases
Solution Approach 1:
The patent applies dynamic channel length adjustment by determining whether to shorten the channel based on comparing the guard period length with the channel length. The channel length is dynamically adjusted (shortened or kept original) according to the ratio of guard period to channel length, allowing the system to adaptively optimize between collision avoidance and time utilization rather than using a fixed guard period approach
Solution Approach 2:
The patent changes the parameter of channel length based on the guard period characteristics. By calculating the ratio of guard period length to channel length and comparing it with a threshold, the system determines whether to shorten the channel, effectively changing the transmission parameter to balance collision avoidance with time efficiency
2Productivity
If channel length is shortened to reduce interference during switching, then DL-UL switching efficiency is improved, but channel transmission capacity is reduced
Solution Approach 1:
The patent implements dynamic channel length adjustment by determining whether to shorten the channel based on comparing the guard period length with the channel length. The channel length is dynamically adjusted (shortened or kept original) according to the ratio of guard period to channel length, allowing the system to adaptively optimize between collision avoidance and time utilization rather than using a fixed guard period approach
Solution Approach 2:
The patent changes the parameter of channel length based on the guard period characteristics. By calculating the ratio of guard period length to channel length and comparing it with a threshold, the system determines whether to shorten the channel, effectively changing the transmission parameter to balance collision avoidance with time efficiency
Data Source
AI summary
There are provided a wireless communication method, apparatus and system. The apparatus, at a first node configured to receive a first channel and/or transmit a second channel, comprising: a receiver, which in operation, receives a first channel; a transmitter, which in operation, transmits a second channel; a circuitry, which, in operation, determines at least part of at least one of the first channel and the second channel to be shortened, according to characteristic of the at least one of the first channel and the second channel, and, in response to said determining, shortens the at least part of the at least one of the first channel and the second channel.