Memory Switching for Multi-Band DL and UL Bandwidth Boosting
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Solution Overview
Problem
User equipment (UE) is limited by its maximum supported bandwidth for each band or carrier, preventing it from transmitting or receiving transmissions larger than its capability, and this limitation is exclusive across bands even if no transmission is occurring, hindering flexible bandwidth utilization.
Innovation Solution
A mechanism for determining a switching period for memory switching to enable flexible bandwidth boosting by allowing memory sharing across bands, with methods for prioritizing transmissions and applying nominal and boost bandwidths to manage simultaneous transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE is configured with multiple carriers on multiple bands for DL or UL transmission, then the UE capability regarding the supported bandwidth for each band is exclusive to each band, but this prevents the UE from utilizing memory resources efficiently when no transmission is occurring on certain bands
Solution Approach 1:
The patent implements dynamic memory switching between different bands based on transmission requirements. The UE can switch memory resources from one band to another depending on which band is actively transmitting, transforming static exclusive memory allocation into dynamic shared allocation. This allows the same memory resources to serve multiple bands sequentially, improving utilization while maintaining reliability for active transmissions.
Solution Approach 2:
The patent allows the UE to temporarily discard memory allocation for inactive bands and recover it for active bands. When a band is not currently transmitting, its memory resources are released and can be reallocated to bands that are actively transmitting. This discarding and recovering mechanism enables efficient memory sharing across multiple bands without compromising the reliability of active transmissions.
2Manufacturing precision
If the UE indicates a maximum supported bandwidth of 50 MHz for both DL and UL on one band, then the UE capability is clearly defined, but the UE cannot transmit or receive transmissions larger than 50 MHz even if memory resources are available
Solution Approach 1:
The patent implements preliminary memory switching before bandwidth boosting transmissions. The UE switches memory resources to the target band before the actual transmission occurs, ensuring that the memory is ready to handle the boosted bandwidth. This preliminary action allows the UE to temporarily exceed its indicated 50 MHz capability by preparing memory resources in advance, thereby increasing transmission throughput while maintaining clear capability specifications.
Solution Approach 2:
The patent changes the memory bandwidth parameter dynamically based on transmission needs. While the UE's indicated capability remains at 50 MHz, the actual memory bandwidth allocated can be changed to support larger transmissions when needed. This parameter change allows the UE to maintain precise capability specification for compatibility while achieving higher productivity through temporary bandwidth expansion via memory sharing from other bands.
3Productivity
If memory switching is implemented to share memory resources across bands, then bandwidth utilization efficiency is improved, but transmission delays may occur during memory switching periods
Solution Approach 1:
The patent implements periodic memory switching between bands in a structured manner. Memory resources are switched between bands at predetermined intervals or based on transmission schedules, creating a periodic pattern of allocation. This periodic action allows the system to optimize bandwidth utilization across bands while managing switching delays through predictable timing, enabling better planning and reducing the impact of switching on overall transmission performance.
Data Source
AI summary
A method for handling transmissions in a wireless cellular access network includes determining whether a switching period for memory switching is needed based on transmissions on transmission carriers. This provides a flexible mechanism for enabling memory switching to thereby boost the downlink (DL) and/or uplink (UL) bandwidth.