D2D Bearer Establishment with Automatic Fallback to Common Connection
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Solution Overview
Problem
The existing D2D bearer establishment procedure in communication technologies often fails due to insufficient resources or long distances between user equipment, leading to service delays and increased signaling overheads, as it requires re-initiating service requests when a D2D link cannot be established.
Innovation Solution
A method that allows for the establishment of a D2D connection using a bearer establishment method, where a base station or packet data gateway receives a D2D mode indication, and if the D2D connection cannot be established, it automatically switches to a common connection, reducing service delays and signaling overheads by eliminating the need for repeated service requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a D2D link is required for communication, then device-to-device communication capability is improved, but service establishment reliability deteriorates when resources are insufficient or distance is long
Solution Approach 1:
The system dynamically switches between D2D mode and common connection mode based on establishment success. The base station receives a D2D mode indication and attempts D2D connection establishment; if successful, D2D communication is used, otherwise it falls back to common connection. This dynamic adaptation resolves the contradiction by making the communication path flexible rather than fixed.
Solution Approach 2:
The system changes the connection mode parameter from strictly D2D to conditional D2D/common connection based on establishment outcome. The D2D mode indication parameter enables this transformation, allowing the system to adjust the connection establishment parameters according to actual resource conditions and distance constraints.
2Adaptability or versatility
If D2D connection establishment is attempted, then direct device-to-device communication is achieved, but service delay increases when establishment fails and re-initiation is required
Solution Approach 1:
The base station performs preliminary D2D connection establishment attempts before giving up on D2D mode. By proactively trying to establish the D2D link first and having the common connection ready as a fallback, the system avoids the time loss of complete service failure and re-initiation, thus reducing overall service delay while maintaining D2D capability when possible.
Solution Approach 2:
The base station acts as an intermediary that manages the transition from D2D mode to common connection mode. It receives the D2D mode indication, attempts D2D establishment, and automatically switches to common connection if D2D fails, serving as a mediator that prevents service interruption and reduces delay without requiring end-device re-initiation.
3Adaptability or versatility
If D2D connection establishment is attempted, then direct communication path is established, but signaling overheads increase when service must be re-initiated
Solution Approach 1:
The base station serves as an intermediary that prevents service re-initiation by automatically switching to common connection when D2D establishment fails. This mediation eliminates the need for the source UE to re-initiate service requests, thereby reducing signaling overheads and energy consumption in the network while preserving D2D communication capability when conditions permit.
Solution Approach 2:
The system implements self-service by automatically handling the fallback from D2D mode to common connection without requiring external re-initiation. The base station autonomously manages the connection mode switching based on establishment outcomes, reducing the need for additional service request signaling and minimizing network overheads.
Data Source
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AI summary
The present invention provides a bearer establishment method, a base station, a packet data gateway, and a computer system, where the bearer establishment method includes: receiving a D2D mode indication requested by an AF entity or a proximity service server for a source UE, where the D2D mode indication includes a first D2D connection establishment mode or a second D2D connection establishment mode; and according to the D2D mode indication, when a D2D connection can be established successfully, establishing the D2D connection for the source UE; or according to the D2D mode indication, when a D2D connection cannot be established successfully, establishing a common connection for the source UE if the D2D mode indication is the first D2D connection establishment mode, and feeding back a connection establishment failure response to the AF entity or the proximity service server if the D2D mode indication is the second D2D connection establishment mode. According to the present invention, a service delay can be reduced and service experience of a user can be improved, and further, signaling overheads of an operator's network can be reduced.