Uplink Data Transmission Robustness via BSR Segmentation
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, the challenge lies in transmitting uplink data robustly on shared uplink resources without collisions, as existing methods fail to differentiate data types effectively, leading to potential loss of important data during collisions on shared SPS resources.
Innovation Solution
A method where User Equipment (UE) transmits only Buffer Status Reports (BSR) on shared SPS resources for data not allowed for contention-based transmission, allowing the network to allocate dedicated uplink grants for such data, thereby preventing collisions and ensuring robust transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink data is transmitted on shared SPS resources using contention-based methods, then resource utilization is improved, but data reliability deteriorates due to collisions
Solution Approach 1:
The patent segments uplink data into two categories: data allowed for contention-based transmission and data not allowed for contention-based transmission. This segmentation enables different transmission strategies for different data types, resolving the contradiction by allowing high resource utilization for suitable data while protecting critical data through dedicated resources.
Solution Approach 2:
The patent applies different transmission qualities to different data types. Contention-based transmission is applied locally to data that can tolerate collisions, while dedicated grant transmission is applied locally to data requiring high reliability. This local differentiation resolves the contradiction by optimizing each data type's transmission method according to its specific requirements.
2Ease of operation
If all uplink data is transmitted using contention-based methods on shared resources, then ease of operation is improved, but data integrity deteriorates due to collision losses
Solution Approach 1:
The patent segments data based on contention permission indicators, separating data that can be transmitted contending from data that requires dedicated grants. This segmentation maintains operational simplicity for most data while protecting critical data integrity through selective dedicated transmission.
Solution Approach 2:
The patent changes the transmission parameter (contention permission) based on data importance. By monitoring this parameter, the system automatically adjusts transmission behavior, maintaining ease of operation for standard data while ensuring data integrity for critical transmissions through dedicated grants.
3Reliability
If dedicated uplink grants are allocated for all data transmissions, then data reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies dedicated grant allocation locally only to data not allowed for contention-based transmission, while using simpler contention-based methods for other data. This local application of quality differentiation improves reliability for critical data without unnecessarily increasing device complexity for all transmissions.
Solution Approach 2:
The patent uses the contention permission indicator parameter to dynamically determine transmission method. This parameter-driven approach automates the decision process, improving reliability for protected data while keeping device complexity manageable through rule-based automatic selection rather than complex manual resource management.
4Productivity
If contention-based transmission is used on shared SPS resources, then resource efficiency is improved, but loss of information increases due to undetectable collisions
Solution Approach 1:
The patent segments data transmission paths based on contention permission, directing critical data through dedicated grants that avoid collisions entirely, while allowing non-critical data to use efficient contention-based paths. This segmentation resolves the contradiction by eliminating collision risks for important data while maintaining resource efficiency for other data.
Solution Approach 2:
The patent applies different transmission qualities locally: high-reliability dedicated grants for critical data and high-efficiency contention-based transmission for non-critical data. This local quality differentiation prevents information loss for important data while maintaining overall resource efficiency.
Data Source
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Figure 2b
Figure 3(a)~3(b)
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting uplink data which is robust to collision on shared uplink resource in wireless communication system, the method comprising: checking whether uplink data is allowed to transmit on contention based resource or not, when the uplink data becomes available for transmission; and transmitting a buffer status reporting (BSR) on the contention based resource without any uplink data, if the uplink data is not allowed to transmit on the contention based resource.