Adaptive Buffer Status Report Mechanism for Wireless Uplink Resource Allocation
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Solution Overview
Problem
Current buffer status reporting (BSR) procedures in wireless communication networks, such as UMTS LTE, are inefficient as they require secondary stations to wait for resource grants to transmit buffer status information, leading to inadequate information exchange during periods of low or high activity, resulting in suboptimal resource utilization.
Innovation Solution
A method that allows adaptive adjustment of buffer status packet parameters based on data traffic characteristics, enabling secondary stations to dynamically adjust the frequency and accuracy of BSRs according to network conditions, prioritizing logical channels with higher activity or QoS requirements, and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secondary stations transmit BSR using granted resources only, then transmission reliability is improved, but response time increases and resource utilization deteriorates during low activity periods
Solution Approach 1:
The patent applies dynamics by enabling secondary stations to switch between two transmission modes (granted resource mode and dedicated resource mode) based on network conditions and activity levels. This dynamic adaptation allows the system to optimize between reliability and responsiveness depending on the operational context, resolving the contradiction between reliable transmission and timely reporting.
Solution Approach 2:
The patent changes the parameter of resource allocation flexibility by introducing a third type of BSR transmission that does not require a granted resource. This parameter change enables stations to report buffer status immediately when data arrives, eliminating the waiting time associated with traditional grant-based transmission while maintaining reliability through the dedicated resource allocation mechanism.
2Device complexity
If fixed BSR format is used for all traffic conditions, then device complexity is reduced, but information precision deteriorates during high activity periods
Solution Approach 1:
The patent implements dynamics by allowing the BSR format to adapt based on traffic conditions. During high activity periods, the system can utilize the enhanced BSR format with additional precision fields, while maintaining the simpler format during low activity periods. This dynamic format selection resolves the contradiction between simplicity and precision.
Solution Approach 2:
The patent applies partial action by providing a basic BSR format that is sufficient for low activity conditions, and an enhanced format with additional precision fields that can be activated when needed. This partial provision of information precision based on actual needs resolves the contradiction between maintaining simplicity and providing high precision when required.
3Loss of information
If BSR is transmitted frequently with high accuracy, then information completeness is improved, but overhead increases and resource utilization deteriorates
Solution Approach 1:
The patent applies partial action by transmitting only the necessary level of buffer status information based on actual buffer conditions. When buffers are empty or activity is low, minimal or no BSR is transmitted. When data is present, comprehensive BSR with full precision is transmitted. This conditional transmission strategy resolves the contradiction between information completeness and overhead reduction.
Solution Approach 2:
The patent changes the transmission parameter from constant frequency to variable frequency based on buffer status and traffic conditions. This parameter adaptation allows the system to minimize overhead during low activity periods while ensuring complete information transmission during high activity periods, resolving the contradiction between information completeness and energy efficiency.
4Productivity
If centralized scheduler allocates resources strictly, then resource allocation efficiency is improved, but adaptability to varying traffic conditions deteriorates
Solution Approach 1:
The patent applies dynamics by introducing flexible BSR transmission mechanisms that can operate independently of strict centralized scheduling. Secondary stations can initiate BSR transmission based on their own buffer conditions rather than waiting for scheduler grants, enabling adaptive response to varying traffic conditions while the scheduler maintains overall resource allocation efficiency.
Data Source
AI summary
The present invention relates to a method for communicating in a network from a first station to a second station, wherein the first station comprises at least one buffer memory for storing data packets to be transmitted, the method comprising the steps of(a) the first station estimating the status of the at least one buffer memory,(b) the first station transmitting at least one buffer status packet representative of the buffer memory status, wherein the method further comprises (c) adapting the value of a first parameter of the buffer status packets on the basis of a data traffic characteristic.