Multi-Band Uplink Switching for Reduced Gap Overhead
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in signal transmission and reception, particularly in managing uplink switching gaps and multiple antenna port transmissions, which limit throughput and spectrum utilization in diverse frequency bands.
Innovation Solution
A method and apparatus for wireless communication systems that involve indicating switching periods for band pairs and performing 2-port or 1-port transmissions on specific carriers, omitting UL switching gaps during maximum switching periods, and utilizing RRC signaling for efficient UL Tx switching between multiple bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 2-port transmission is performed on carrier of band A and 1-port transmission on carriers of band B and C, then transmission capacity is improved, but UL switching gap increases
Solution Approach 1:
The UE indicates switching periods AB and AC for different band pairs in advance, allowing the BS to prepare switching configurations ahead of time. This preliminary indication enables the system to optimize switching timing and reduce actual switching gaps when transmission occurs.
Solution Approach 2:
The system dynamically adjusts transmission modes based on switching periods. When the UL switching gap is determined as the maximum of switching periods AB and AC, the system omits transmission during this gap to accommodate the longest switching requirement, thereby dynamically adapting to varying switching needs across different band combinations.
2Productivity
If multiple antenna port transmissions are supported across multiple bands, then spectrum utilization is improved, but device complexity increases
Solution Approach 1:
The system segments the transmission management into separate switching periods for different band pairs (AB and AC). Each band pair has its own switching period parameter, allowing independent management and simplifying the overall complexity by breaking down the multi-band transmission coordination into manageable segments.
Solution Approach 2:
The UE capability indication mechanism serves multiple functions: it provides switching period information for different band pairs, enables the BS to determine appropriate switching gaps, and facilitates coordinated transmission across multiple bands. This multi-functional approach reduces complexity by consolidating management functions.
3Reliability
If UL switching gap is set to maximum of switching periods AB and AC, then switching reliability is improved, but transmission time is reduced
Solution Approach 1:
The UE indicates switching periods AB and AC in advance through capability signaling. This preliminary provision of switching period information allows the BS to calculate the appropriate UL switching gap (maximum of AB and AC) before actual transmission occurs, ensuring reliable switching while optimizing transmission scheduling.
Solution Approach 2:
The system uses UE capability indication as feedback to determine switching parameters. The BS receives switching period information from the UE and uses this feedback to set the UL switching gap appropriately, ensuring that switching reliability is maintained while transmission time is optimized based on actual UE capabilities.
Data Source
AI summary
A method and device for transmitting and receiving signals in a wireless communication system, disclosed in the present specification, perform uplink switching among three or more bands. Here, an uplink switching gap may be set to a maximum value among switching sections for each of associated band pairs.