Bandwidth Allocation for Mobile Data in Optical Networks
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Solution Overview
Problem
The existing network technologies face challenges in achieving low latency for mobile data transmission, particularly in optical networks, which is essential for providing efficient mobile services.
Innovation Solution
A bandwidth allocation method using cooperative dynamic bandwidth allocation (CO DBA) is implemented, where the Optical Line Terminal (OLT) receives a CTI message from a mobile network's Distributed Unit (DU), aligning time slots and allocating bandwidth based on traffic patterns to match actual traffic volume and timing, thereby reducing upstream latency in Passive Optical Networks (PON).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional bandwidth allocation methods are used in optical networks, then network stability is maintained, but latency increases and mobile service performance deteriorates
Solution Approach 1:
The patent implements preliminary action by having the DU send traffic pattern information to the OLT in advance through CTI messages. The OLT uses this information to pre-allocate bandwidth before actual traffic arrives, ensuring that bandwidth is ready when needed and thus reducing latency while maintaining network stability through planned allocation.
2Productivity
If bandwidth is allocated based on fixed patterns, then allocation simplicity is maintained, but bandwidth efficiency decreases due to mismatch with actual traffic
Solution Approach 1:
The patent applies dynamics by transitioning from fixed bandwidth allocation to dynamic allocation based on actual traffic patterns. The DU monitors traffic and sends CTI messages with pattern information to the OLT, which then dynamically adjusts bandwidth allocation to match actual traffic demands, improving efficiency while managing complexity through automated feedback loops.
Solution Approach 2:
The patent implements feedback mechanisms where the DU continuously monitors traffic patterns and sends CTI messages to the OLT with this information. The OLT uses this feedback to adjust bandwidth allocation dynamically, ensuring that allocation matches actual traffic needs and improving bandwidth efficiency through continuous optimization.
3Loss of time
If time alignment is implemented between RAN and PON, then latency is reduced, but synchronization complexity increases
Solution Approach 1:
The patent applies universality by using the CTI message interface for multiple purposes: it carries traffic pattern information, timing alignment data, and bandwidth allocation instructions. This multi-functional approach enables time alignment between RAN and PON to reduce waiting time while managing synchronization complexity through a unified communication protocol.
Data Source
AI summary
Provided are a method of bandwidth allocation for transmitting mobile data and a network device. The bandwidth allocation method includes receiving a cooperative transport interface (CTI) message including a traffic pattern corresponding to a CTI pattern identification (ID) from a distributed unit (DU) of a mobile network, and allocating a bandwidth for transmitting mobile data based on the traffic pattern included in the CTI message.