Buffer Status Report Continuity During Base Station Handover
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Solution Overview
Problem
In wireless communication systems, particularly during handover of a user equipment (UE) from one base station to another, there is a challenge in maintaining continuity of the buffer status report (BSR) to ensure efficient resource allocation for data transmission, leading to increased latency and network congestion.
Innovation Solution
A method where the source base station allocates a set of resources for data transmission by the UE and transmits an indication to the target base station about the remaining data for which resources have not been allocated, ensuring continuity of the BSR during handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the source base station allocates resources for data transmission by the UE, then data transmission capability is improved, but the capacity of allocated resources may be insufficient for the total amount of data indicated by BSR
Solution Approach 1:
The source base station performs preliminary action by allocating resources for data transmission before handover occurs. The indication of remaining data is transmitted to the target base station in advance, enabling the target base station to prepare appropriate resource allocation before the UE actually needs to transmit the remaining data, thus avoiding latency and buffer overflow issues.
2Reliability
If the UE waits for resource allocation after handover, then handover completion is ensured, but transmission latency increases and buffer overflow may occur
Solution Approach 1:
The target base station performs preliminary action by receiving the indication of remaining data during handover preparation and allocating resources in advance. This eliminates the need for the UE to wait until after handover completion for resource allocation, thus reducing transmission latency while ensuring handover reliability.
Solution Approach 2:
The source base station provides feedback by transmitting an indication of remaining data to the target base station during handover. This feedback mechanism enables the target base station to understand the UE's data transmission needs and allocate resources accordingly, preventing buffer overflow and reducing latency without compromising handover completion.
3Measurement precision
If the UE transmits another BSR after handover, then accurate buffer status is reported, but computational load at UE increases and time is lost
Solution Approach 1:
The indication of remaining data acts as an intermediary mechanism that carries buffer status information from the source base station to the target base station during handover. This intermediary approach eliminates the need for the UE to construct and transmit another BSR after handover, reducing UE computational load while maintaining accurate buffer status information availability at the target base station.
Data Source
AI summary
The present disclosure provides systems, methods, and apparatuses for maintaining continuity of a buffer status report (BSR) from a user equipment (UE) when the UE is handed over between base stations. In one aspect, a base station or a component thereof may be configured to allocate a set of resources for transmission by a UE. The set of resources may have a capacity that is insufficient for an amount of data indicated by a BSR from the UE. The base station or component thereof may be further configured to transmit, to another base station in association with handover of the UE, an indication that the capacity of the set of resources is insufficient for the amount of the data indicated by the BSR.