Communication System Data Bearer Blocking During Call Setup
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Solution Overview
Problem
Current call set-up procedures in communication systems, such as UMTS, allow data transmission on reserved PDP contexts during call alerting, leading to potential unauthorized usage and charging issues, and existing solutions like pre-reserving radio bearers or delaying call setup introduce delays or prevent network announcements.
Innovation Solution
A method to prevent data transportation on user equipment until the communication connection is established, involving signaling instructions to nodes associated with the data bearer to block data transmission and creating separate charging records to detect and charge for data usage during call setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data bearer resources are reserved during call set-up, then resource availability is improved, but unauthorized data transmission during alerting occurs
Solution Approach 1:
The patent applies preliminary anti-action by pre-configuring the data bearer with restrictions that prevent data transmission during the alerting phase. The bearer is set up with specific parameters (such as QoS parameters or activation flags) that actively block data flow before the call is fully established, counteracting the potential harmful effect of unauthorized transmission while maintaining resource availability.
Solution Approach 2:
The patent utilizes parameter changes by modifying the state or configuration parameters of the data bearer based on call establishment status. During alerting, specific parameters (e.g., bearer activation state, QoS parameters) are adjusted to prevent data transmission, and then changed again once the call is fully established, allowing legitimate data flow while preventing unauthorized use during setup.
2Object-generated harmful factors
If radio bearer establishment is delayed until call set-up completion, then unauthorized data transmission is prevented, but post-pickup delay increases
Solution Approach 1:
The patent applies preliminary action by establishing the radio bearer in advance during the call set-up procedure, but configuring it with restrictions that prevent data transmission until the call is fully established. This allows the bearer to be ready beforehand (reducing post-pickup delay) while the preliminary configuration prevents unauthorized data transmission during the alerting phase.
3Object-generated harmful factors
If radio bearer is not established during alerting, then unauthorized data transmission is prevented, but network announcements cannot be played
Solution Approach 1:
The patent applies local quality by creating different transmission permissions for different types of data flow within the same bearer. Network announcements (downlink traffic from network to user equipment) are permitted during alerting, while uplink data transmission from user equipment is blocked. This selective quality control allows announcements to be played while preventing unauthorized data transmission.
Data Source
AI summary
In a communication system a procedure is initiated to establish a communication connection for a user equipment. A data bearer may be established via one or more nodes of the communication system for the user equipment before the communication connection procedure is completed. An instruction is signalled to at least one of the nodes associated with the data bearer to prevent transportation of data to or from the user equipment using the data bearer. Based on the instruction, transportation of data to or from the user equipment is prevented until the communication connection establishment procedure has been completed. According to a further aspect, an indication is signalled to at least one of the nodes that the communication connection establishment procedure is completed. Charging record unit associated with charging of data transportation prior said completion are closed in response to the signal.