Relay Station Bandwidth Allocation Latency Reduction
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Solution Overview
Problem
In multi-hop relay wireless communication systems, the relay stations lack knowledge of Quality of Service (QoS) information for service flows, leading to increased latency in bandwidth allocation, as they need to wait for the base station to allocate bandwidth and manage resources without proper timing synchronization.
Innovation Solution
The base station shares connection information, including QoS details, with relay stations to enable them to allocate bandwidth independently, reducing latency by informing them of service class-specific timing and resource allocation requirements, allowing the relay stations to schedule bandwidth allocation based on received QoS information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay stations wait for base station to allocate bandwidth before managing their own resources, then bandwidth allocation can be coordinated centrally, but latency increases and real-time service quality deteriorates
Solution Approach 1:
The base station performs preliminary action by proactively notifying relay stations of connection information and QoS parameters before the relay stations need to allocate bandwidth. This allows relay stations to prepare and execute bandwidth allocation independently without waiting for base station instructions, thereby reducing latency while maintaining coordination through the pre-shared connection information.
2Loss of time
If relay stations operate independently without base station control, then bandwidth allocation latency is reduced, but coordination and QoS management become less reliable
Solution Approach 1:
The base station provides feedback to relay stations by notifying them of connection information, QoS parameters, and timing details. This feedback mechanism enables relay stations to operate independently with reduced latency while maintaining reliable QoS management, as the relay stations use the received feedback information to make coordinated bandwidth allocation decisions that align with base station policies.
3Device complexity
If relay stations lack QoS information for service flows, then device complexity is reduced, but network performance and real-time service quality deteriorate
Solution Approach 1:
The base station extracts and separates the QoS information and connection parameters from its own processing functions, then transmits this information to relay stations. This allows relay stations to operate with reduced complexity by receiving pre-processed QoS data, while the base station maintains overall network performance through centralized coordination and real-time service quality management.
Data Source
AI summary
A multi-hop wireless communication system, in which packets of data are transmitted over a connection between a base station (MR-BS) and a subscriber station (SS) via at least one relay station (RS), the packets of data being transmitted in accordance with one of a plurality of service classes each having a respective quality-of-service (QoS), and available bandwidth in the system being shared among a plurality of such connections in accordance with their service classes. To decrease the latency of bandwidth allocation in the system, and to support its scheduler algorithm, the RS has to know the QoS demands and the bandwidth allocating requirements of each connection.