Uplink Packet Routing via Index Mapping in NB-IoT
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Solution Overview
Problem
In small data services for NB-IoT, the existing packet transmission process is inefficient as user equipment must include extensive information about forwarding devices in packets, leading to significant utilization of air interface resources for forwarding device information rather than service data.
Innovation Solution
The access network node determines the forwarding device based on index information received from user equipment, eliminating the need for user equipment to add forwarding device information to packets, thereby optimizing air interface resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment adds information about forwarding device to the packet, then the access network node can determine the forwarding device to send the packet, but the size of the packet increases significantly and air interface resource utilization decreases
Solution Approach 1:
The patent extracts the forwarding device information from the user equipment's packet and places it in the access network node's local context. The access network node determines the forwarding device based on the connectionless access interface and uses its locally stored forwarding information to route the packet, eliminating the need for user equipment to include forwarding device information in the packet.
Solution Approach 2:
The access network node acts as an intermediary between the user equipment and the forwarding device. It receives packets from user equipment via the connectionless access interface, determines the appropriate forwarding device using its local context information, and forwards the packet accordingly, thereby mediating the routing process without requiring user equipment to know forwarding device details.
2Reliability
If user equipment includes forwarding device information in each packet, then the packet can be routed correctly, but air interface resources are wasted transmitting redundant information
Solution Approach 1:
The patent extracts forwarding device determination logic from the user equipment and relocates it to the access network node. The access network node uses its local context to identify the forwarding device, removing the need for user equipment to transmit forwarding device information over the air interface.
Solution Approach 2:
The access network node performs self-service by maintaining local context information about forwarding devices and using this information to automatically determine the appropriate forwarding device for each packet. This self-service mechanism eliminates the need for user equipment to provide forwarding device information, thereby conserving air interface resources.
3Device complexity
If the access network node uses connectionless access interface to receive packets, then the system is simpler and more flexible, but the access network node cannot determine the forwarding device without additional information in the packet
Solution Approach 1:
The access network node performs preliminary actions by pre-establishing context information about forwarding devices before receiving packets. This context information includes forwarding device identifiers and routing details, which the access network node uses to immediately determine the appropriate forwarding device upon receiving a packet through the connectionless access interface.
Solution Approach 2:
The access network node serves as an intermediary that bridges the connectionless access interface and the forwarding device selection process. It receives packets without requiring forwarding device information in the packet, determines the appropriate forwarding device using its local context, and forwards the packet accordingly, thereby simplifying the access interface while maintaining ease of operation.
Data Source
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AI summary
Embodiments of the present invention relate to the field of communications technologies, and provide a packet transmission method, an apparatus, and a packet transmission system, so that an uplink packet can be successfully transmitted to a corresponding forwarding device without requiring user equipment to add information about the forwarding device to the packet, thereby improving utilization of an air interface resource in a small data service. The method includes: receiving, by an access network node, an uplink packet from user equipment, where the uplink packet includes first index information, and the first index information is used to search for a first forwarding device that is to forward the uplink packet; determining, by the access network node, the first forwarding device corresponding to the first index information; and sending the uplink packet to the first forwarding device.