Bandwidth Scheduling for Distributed Base Stations
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Solution Overview
Problem
In distributed base station networks, the limited bandwidth resources in PON networks lead to significant transmission delays and poor user experience when a large number of RRUs are connected, as existing bandwidth scheduling methods are inefficient in allocating resources based on varying traffic demands.
Innovation Solution
A bandwidth scheduling method where the BBU allocates radio resources to RRUs based on their traffic demands, dynamically adjusting these resources to ensure that the total bandwidth demand does not exceed available resources, thereby reducing transmission delays and improving bandwidth utilization by prioritizing high-priority services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the BBU connects to a large quantity of RRUs or provides a large quantity of UE services in a PON network, then the service coverage and capacity are improved, but the bandwidth resources become insufficient leading to increased transmission delay
Solution Approach 1:
The patent implements dynamic bandwidth allocation by allowing RRUs to flexibly adjust their bandwidth usage based on real-time traffic demands. The RRU can dynamically switch between different bandwidth configurations (e.g., 10MHz, 20MHz, 40MHz) to adapt to varying service requirements, ensuring that bandwidth resources are optimally utilized without causing transmission delays even when serving a large number of users.
Solution Approach 2:
The patent changes the bandwidth parameter of RRUs dynamically based on traffic conditions. By adjusting the bandwidth parameter (e.g., switching between 10MHz, 20MHz, 40MHz configurations) according to actual service demands, the system can accommodate more services while maintaining acceptable transmission delays. The BBU monitors traffic patterns and issues bandwidth adjustment commands to RRUs accordingly.
2Device complexity
If traditional bandwidth scheduling methods are used where RRUs report bandwidth demands to the BBU, then the allocation process is simple, but the bandwidth resources are insufficient when many RRUs are connected
Solution Approach 1:
The patent implements preliminary bandwidth configuration where the BBU pre-configures bandwidth parameters for each RRU based on historical traffic data, service requirements, and network conditions. Instead of waiting for RRUs to report demands and then allocating bandwidth reactively, the BBU proactively sets appropriate bandwidth parameters in advance, allowing RRUs to immediately utilize pre-allocated resources without waiting for scheduling cycles, thus effectively increasing available bandwidth resources.
Solution Approach 2:
The patent implements a feedback mechanism where RRUs monitor their actual bandwidth usage and transmission performance, then report this information back to the BBU. The BBU uses this feedback to continuously optimize bandwidth allocation, adjusting parameters for individual RRUs based on their actual needs rather than using fixed or uniform allocation. This closed-loop control ensures that bandwidth resources are efficiently distributed among multiple RRUs.
Data Source
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AI summary
This application provides a bandwidth scheduling method and an apparatus, to resolve a problem in the prior art that a transmission delay is relatively large and user experience is relatively poor when a BBU and an RRU are networked by using a PON network. The method includes: allocating, by a baseband unit, radio resources used for data transmission between N first radio frequency units and a terminal to the N first radio frequency units connected to the baseband unit, where N is an integer greater than 0; and then allocating, by the baseband unit based on the radio resources of the N first radio frequency units, bandwidth resources used for data transmission between the baseband unit and the N first radio frequency units to the N first radio frequency units.