Capillary Network QoS Mapping via Destination Port
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Solution Overview
Problem
In capillary networks, ensuring Quality of Service (QoS) for Machine Type Communication (MTC) devices is challenging due to modifications in Differentiated Services Code Points (DSCP) along administrative domains, which can alter intended QoS, making it difficult to guarantee specific traffic classes like voice data or file transfers.
Innovation Solution
A method where the sending network node selects and associates a required QoS with a destination port number, allowing recipients to determine and transfer messages accordingly, ensuring consistent QoS across the network by using a fixed port number that cannot be altered, and deriving QoS from the destination port number at various network nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If DSCP is used to indicate QoS in capillary networks, then traffic classification is enabled, but administrative domains can modify DSCP values, causing loss of intended QoS information
Solution Approach 1:
The patent introduces an intermediary mapping mechanism where the original DSCP value is mapped to a new DSCP value through a mapping table stored in memory. This intermediary layer preserves the original QoS information while adapting to network modifications, as the mapping function translates modified DSCP values back to their original meanings based on pre-configured mappings between source and destination administrative domains.
Solution Approach 2:
The patent implements preliminary action by pre-configuring mapping tables in memory that define the relationship between DSCP values from different administrative domains before packets arrive. These pre-established mappings enable the system to automatically restore original QoS information without real-time computation, ensuring that QoS indications remain accurate even when DSCP values are modified during transmission through intermediate networks.
2Adaptability or versatility
If gateway acts as UE towards cellular network, then MTC devices can connect via gateway, but QoS control becomes more complex in the capillary network
Solution Approach 1:
The patent implements self-service by enabling the capillary network gateway to automatically perform QoS mapping operations without requiring complex external control mechanisms. The gateway itself maintains the mapping table in its memory and autonomously applies the mapping function to incoming packets, restoring original DSCP values based on the source and destination administrative domains. This self-contained approach simplifies QoS control despite the gateway's dual role.
3Ease of operation
If DSCP is modified by administrative domains, then network routing flexibility is improved, but original QoS indication is lost
Solution Approach 1:
The patent implements feedback by using the source and destination administrative domain information as input to the mapping function. The mapping function takes the modified DSCP value along with domain identification information and feedback from the pre-configured mapping table to determine the original QoS indication. This feedback mechanism ensures that even when DSCP values are modified for routing purposes, the original QoS meaning can be recovered at the destination.
Data Source
AI summary
The present invention relates to methods and devices for indicating Quality of Service (QoS) of a message intended for a Machine Type Communication (MTC) device in a capillary network.Thus, provided is, i.e., a method at a core network node of determining QoS of a message intended for an MTC device in a capillary network. The method comprises receiving a message on a destination port, a number of which destination port indicates a required QoS with which the message should be sent towards the MTC device, and deriving the required QoS from the destination port number. The method further comprises transferring the message in accordance with the required QoS towards the MTC device.