Wireless Backhaul Service Flow Mapping for QoS and Latency
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Solution Overview
Problem
Conventional wireless networks face challenges in efficiently managing and delivering data packets with varying quality of service requirements over backhaul networks, particularly in cable modem systems, leading to suboptimal resource allocation and latency issues.
Innovation Solution
A communication management resource maps data packets to specific service flows based on their quality of service tags, using a mapping system to route them through queues with different transmission characteristics, ensuring guaranteed bit rates and latency thresholds, thereby optimizing the conveyance of data packets over hybrid fiber-coaxial infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data packets are transmitted over a shared backhaul network without quality of service mapping, then network resource utilization is improved, but latency and service reliability deteriorate
Solution Approach 1:
The backhaul network is segmented into multiple service flows, each dedicated to specific quality of service categories. Data packets are segmented and routed through appropriate service flows based on their quality of service requirements, ensuring that time-sensitive packets receive priority handling while maintaining overall network utilization.
Solution Approach 2:
Different service flows are assigned different quality of service characteristics locally within the network. Each service flow can be optimized for specific requirements (e.g., low latency, high throughput), allowing packets to receive appropriate treatment based on their specific needs rather than treating all traffic uniformly.
2Reliability
If multiple service flows are implemented with quality of service mapping, then service reliability is improved, but device complexity increases
Solution Approach 1:
The communication management resource is designed to perform multiple functions: receiving data packets, determining quality of service, mapping to service flows, and forwarding packets. This multi-functional approach consolidates complexity into a single resource rather than requiring separate specialized components for each function.
Solution Approach 2:
The communication management resource acts as an intermediary between the wireless network and the backhaul network. It handles the complexity of quality of service mapping and service flow management centrally, shielding the rest of the network from complexity while ensuring reliable service delivery.
3Loss of time
If quality of service mapping is implemented at the communication management resource, then latency is reduced, but use of energy increases
Solution Approach 1:
The communication management resource performs quality of service determination and service flow mapping in advance, before packets are transmitted over the backhaul network. This preliminary action ensures that packets are pre-configured for their destination service flow, reducing transmission latency without requiring continuous energy-intensive processing during packet forwarding.
Data Source
AI summary
A system as discussed herein includes communication management hardware. The communication management hardware: receives a first data packet including a first data payload, the first data packet encoded in accordance with a wireless communication protocol for conveyance to a destination network address; maps a first quality of service associated with the first data packet to a first service flow amongst multiple service flows supported by a backhaul network; and forwards the first data packet over the first service flow of the backhaul network for delivery of the first data packet to the destination network address.