Separate Buffer Status Reporting for Packet Duplication
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Solution Overview
Problem
In wireless communication systems, particularly in 5G and LTE, packet duplication leads to receivers misunderstanding duplicated packets, resulting in improper operations due to joint buffer status reporting, which schedules excessive UL grants.
Innovation Solution
A base station and communication device configuration that separates buffer status reporting for distinct logical channels, allowing separate UL grants based on individual buffer statuses to prevent joint reporting and ensure accurate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If joint buffer status reporting is used for duplicated packets, then resource allocation is simplified, but receivers misunderstand duplicated packets resulting in improper operations
Solution Approach 1:
The patent segments the buffer status reporting by separating it into individual logical channel reports. Instead of joint reporting for duplicated packets, the system now reports buffer status separately for each logical channel (LC1, LC2, etc.), allowing receivers to correctly identify and process duplicated packets without misunderstanding.
2Reliability
If separate buffer status reporting is implemented for each logical channel, then data transmission reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the buffer status reporting by separating it into individual logical channel reports. Instead of joint reporting for duplicated packets, the system now reports buffer status separately for each logical channel (LC1, LC2, etc.), allowing receivers to correctly identify and process duplicated packets without misunderstanding.
Solution Approach 2:
The patent changes the reporting parameter structure by introducing separate buffer status indicators for each logical channel. The base station configures different reporting parameters for each LC, and the UE reports buffer status using these differentiated parameters, enabling reliable identification of duplicated packets while maintaining structured resource allocation.
3Productivity
If joint buffer status reporting is used, then UL grant allocation is efficient, but excessive resources are allocated due to receiver misunderstanding
Solution Approach 1:
The patent segments the buffer status reporting by separating it into individual logical channel reports. Instead of joint reporting for duplicated packets, the system now reports buffer status separately for each logical channel (LC1, LC2, etc.), allowing receivers to correctly identify and process duplicated packets without misunderstanding.
Solution Approach 2:
The patent implements feedback mechanisms where the base station configures the UE to report buffer status for specific logical channels, and the base station uses this feedback to allocate UL grants appropriately. This feedback loop prevents excessive resource allocation by ensuring the base station has accurate information about actual buffer needs for each logical channel.
Data Source
AI summary
A base station (BS) for handling buffer status reporting comprises a storage device and a processing circuit coupled to the storage device. The storage device stores, and the processing circuit is configured to execute instructions of: configuring a radio bearer (RB) and configuring a first logical channel (LC) and a second LC associated to the RB, to a communication device; configuring the communication device to report separate buffer statuses for the first LC and the second LC associated to the RB; receiving a first buffer status comprising a volume of data associated to the first LC and a second buffer status comprising a volume of data associated to the second LC, from the communication device; transmitting a first UL grant to the communication device according to the first buffer status; and transmitting a second UL grant to the communication device according to the second buffer status.