Dynamic Buffer Allocation for Multi-RAT Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE networks, face challenges in efficiently managing buffers for user equipment (UE) across multiple radio access technologies (RATs), leading to inefficiencies in data transmission and storage due to assumptions about buffer sizes based on limited resource allocations.
Innovation Solution
The system involves a method where a base station receives information on the buffer size and resource capabilities from the UE and transmits encoded data using multiple RATs, allocating portions of the buffer based on assumed sizes to optimize data storage and transmission, allowing for dynamic allocation and sharing of soft buffer space between different RATs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the base station assumes a fixed buffer size for the UE based on limited resource allocations, then the system complexity is reduced, but the data transmission efficiency deteriorates due to buffer space wastage or insufficiency
Solution Approach 1:
The patent implements dynamic buffer size indication where the base station receives actual buffer size information from the UE and dynamically adjusts the assumed buffer size accordingly. This allows the system to adapt to varying buffer capacities rather than using fixed assumptions, thereby improving data transmission efficiency without significantly increasing system complexity through standardized signaling procedures.
Solution Approach 2:
The patent changes the buffer size parameter from a fixed assumed value to a dynamically indicated value. The UE signals its actual buffer size capability to the base station, which then uses this updated parameter for data transmission decisions. This parameter change enables more accurate matching of transmitted data to actual buffer capacity, eliminating both buffer space wastage and insufficiency issues.
2Reliability
If the base station allocates buffer space for multiple RATs separately, then the reliability of each RAT is improved, but the overall buffer utilization deteriorates due to fragmented space
Solution Approach 1:
The patent implements a shared buffer model where a single buffer space serves multiple Radio Access Technologies (RATs) such as NR and LTE. The base station receives the overall buffer size from the UE and allocates portions to different RATs based on actual needs rather than requiring separate dedicated buffers. This multi-functional buffer approach maintains reliable communication for each RAT while achieving efficient overall buffer utilization without fragmentation.
Solution Approach 2:
The patent merges separate buffer allocations for different RATs into a single unified buffer management approach. Instead of maintaining distinct buffer spaces for NR and LTE, the system combines them into one shared buffer where the base station can flexibly allocate portions to each RAT based on current transmission requirements. This merging eliminates buffer space fragmentation while preserving the reliability needed for each RAT's communication.
3Measurement precision
If the UE reports detailed buffer information to the base station, then the data transmission accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent implements partial information reporting where the UE signals only the overall buffer size capability to the base station rather than detailed information about each buffer portion or each RAT's specific buffer requirements. The base station then uses this partial information combined with its knowledge of allocated resources to determine appropriate buffer allocations for different RATs. This partial reporting approach achieves sufficient transmission accuracy while minimizing signaling overhead.
Data Source
AI summary
Certain aspects of the present disclosure relate to methods and apparatus for buffer management for a user equipment (UE) for multiple radio access technologies (RATs). Certain aspects provide transmitting data using a first RAT and second RAT to the UE based on an assumed size of a first portion of a buffer at the UE assumed allocated for storing data received by the UE using the first RAT and an assumed size of a second portion of the buffer assumed allocated for storing data received by the UE using the second RAT. The size of the first portion is based on a first number of resources the UE is capable of using for communicating and a second number of resources the UE is configured or allocated to use. The size of the second portion is based on an overall size of the buffer and the size of the first portion.