Antenna Switching in Dual-Network Terminals
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Solution Overview
Problem
In 5G communications, the conflict between LTE and NR bands during transmit antenna switching affects communication quality due to antenna resource contention in dual-network connected states.
Innovation Solution
The method determines the first network for control plane data and the second network for user plane data, using the first network's transmit antenna to set the SRS antenna switching mode for the second network, ensuring that SRS antenna switching is performed using a set of antennas that does not interfere with the first network's transmit antenna, thereby avoiding resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs transmit antenna switching on the LTE band and SRS antenna switching on the NR band simultaneously, then both networks can optimize their signal quality, but antenna resource contention occurs causing communication quality degradation
Solution Approach 1:
The patent segments the antenna resources by creating separate antenna sets for LTE and NR bands. The first antenna set is dedicated for LTE transmit antenna switching while the second antenna set is dedicated for NR SRS antenna switching, eliminating resource contention between the two networks
Solution Approach 2:
The patent applies local quality by assigning different antenna configurations to different networks. The first antenna set is optimized for LTE band characteristics while the second antenna set is optimized for NR band characteristics, allowing each network to operate with its own optimal antenna configuration without interfering with the other
2Device complexity
If the terminal device uses the same antenna for both LTE and NR transmit switching, then device complexity is reduced, but communication quality is affected due to resource conflicts
Solution Approach 1:
The patent implements multi-functionality by enabling the terminal device to operate in dual-network connected state with separate antenna sets for each network. The first antenna set handles LTE transmit switching while the second antenna set handles NR SRS switching, allowing both networks to function simultaneously without mutual interference, thus achieving universal compatibility with different network requirements
Data Source
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AI summary
The present disclosure provides a transmit antenna switching method and a terminal device. The method includes: when the terminal device is in a dual-network connected state, determining a first network used to transmit control plane data and a second network only used to transmit user plane data, where the dual-network connected state is that the terminal device is simultaneously connected to the first network and the second network; determining, based on a transmit antenna used by the first network, a first transmit mode for switching an SRS antenna operating in the second network; and performing the SRS antenna switching based on the first transmit mode by using a first antenna set, where the first antenna set is all antennas used for the dual-network connected state included in the terminal device except the transmit antenna used by the first network.