Uplink Carrier Scheduling Around RF Chain Tx Switching Limits
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Solution Overview
Problem
Uplink transmission failures occur when user equipment (UE) performs transmissions on bands with multiple carriers due to the need for radio frequency chain switching between different carriers.
Innovation Solution
A communication method where a terminal device reports its capability to simultaneously perform transmissions on multiple carriers using one radio frequency chain, allowing the network device to schedule transmissions to avoid switching durations and prevent failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs uplink transmission on multiple carriers using one radio frequency chain, then the transmission success rate is improved, but the UE needs to switch the radio frequency chain between different carriers which causes transmission failures in some time periods
Solution Approach 1:
The UE reports its radio frequency chain switching capability to the network device in advance. Based on this capability information, the network device performs preliminary scheduling to avoid assigning multiple carriers that would require switching during the same time period, thereby preventing transmission failures before they occur.
Solution Approach 2:
The system dynamically adjusts the carrier assignment based on the UE's radio frequency chain switching capability. The network device determines whether to allow simultaneous transmission on multiple carriers by evaluating the UE's capability, and dynamically schedules carriers accordingly to optimize transmission success while minimizing switching duration impacts.
2Adaptability or versatility
If the UE switches the radio frequency chain between different carriers to support transmission on multiple bands, then the adaptability is improved, but the transmission reliability deteriorates due to switching duration
Solution Approach 1:
The UE provides feedback information about its radio frequency chain switching capability to the network device. The network device uses this feedback to make informed scheduling decisions, assigning carriers in a way that respects the UE's switching limitations and avoids scheduling multiple carriers that would require switching during the same time period, thereby maintaining high transmission reliability.
3Productivity
If the network device schedules transmission on multiple carriers simultaneously, then the productivity is improved, but the transmission reliability deteriorates when the UE needs to perform carrier switching
Solution Approach 1:
The network device performs preliminary scheduling based on the UE's reported capability information. It determines in advance which carriers can be assigned simultaneously and which require switching, and schedules them accordingly to avoid conflicts, thereby maintaining high productivity while ensuring transmission reliability.
Data Source
AI summary
A communication method includes reporting fourth and fifth band sets. The fourth band set and the fifth band set include a twelfth band and a thirteenth band. A maximum quantity of layers supported by uplink transmission on the twelfth band of the fourth band set is 1. A maximum quantity of layers supported by uplink transmission on the thirteenth band of the fourth band set is 2. A maximum quantity of layers supported by uplink transmission on the twelfth band of the fifth band set is 2. A maximum quantity of layers supported by uplink transmission on the thirteenth band of the fifth band set is 2. The method also includes receiving fourth information that indicates transmitter (Tx) switching on the twelfth band and the thirteenth band. The method further includes performing Tx switching on the twelfth band and the thirteenth band based on parameters of a sounding reference signal.