Uplink Buffer Status Reporting for 5G Resource Allocation
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Solution Overview
Problem
In 5G wireless communications, uplink data transmission latency exceeds expected values due to inefficient radio access network scheduling, leading to over-allocation of resources to active devices, which blocks resources for other devices and results in longer delays and wasted resources, especially with bursty traffic patterns.
Innovation Solution
A method and device for transmitting a buffer status report from wireless devices to network nodes, including information on the amount and type of data in the buffer, allowing for more precise resource allocation and proactive scheduling to improve Quality of Service (QoS) by considering data age, priority, and burst relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are allocated to wireless devices based on current active data transmissions, then active devices receive sufficient resources, but other wireless devices experience longer delays and resource blocking
Solution Approach 1:
The patent applies preliminary action by having wireless devices report their buffer status in advance before actual data transmission occurs. The network node receives buffer status reports that include information about upcoming data transmissions, allowing it to allocate resources proactively rather than reactively. This enables the network to prepare resource allocations ahead of time, ensuring that when data needs to be transmitted, appropriate resources are already allocated, thereby reducing access delays for all devices including those currently active.
2Productivity
If resources are over-allocated to active wireless devices, then their transmission needs are met, but resources are blocked for other devices in the cell
Solution Approach 1:
The patent implements feedback mechanisms where wireless devices continuously report their buffer status to the network node. This feedback loop includes information about the amount of data in buffers and characteristics of the data (such as priority or type), enabling the network node to make informed resource allocation decisions. The network receives feedback about actual transmission needs and adjusts resource allocations accordingly, preventing both over-allocation to active devices and resource blocking, thereby optimizing overall system productivity while avoiding resource waste.
3Device complexity
If traditional buffer status reporting is used, then basic data amount information is provided, but resource allocation cannot be optimized for data characteristics
Solution Approach 1:
The patent applies local quality by enhancing the buffer status report to include not just the amount of data but also specific characteristics of the data such as priority level and data type. This allows different portions of the buffer to be treated differently based on their content characteristics. The network node can then allocate resources with precision tailored to the specific needs of different data types, optimizing resource allocation precision while maintaining reasonable reporting complexity through structured information collection.
Data Source
AI summary
Disclosed is a method, performed by a wireless device, for uplink transmission to a network node. The method comprises transmitting, to the network node, a buffer status report. The buffer status report may comprise first information indicative of an amount of data in a buffer of the wireless device. The buffer status report comprises second information further qualifying the data in the buffer. The method comprises receiving, from the network node, control signalling indicative of an allocation of a resource for uplink transmission of the data.