ProSe Bearer Authorization for Rate Control and Session Continuity
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Solution Overview
Problem
Existing ProSe communications lack network involvement for bearer setup and data rate control, lack defined dependencies between discovery and communication, and lack methods for session continuity between internet and ProSe paths.
Innovation Solution
Implement network authorization for ProSe bearer setup, define aggregate maximum bit rates, establish ProSe bearers with TFTs and packet filters, and ensure session continuity by managing IP address translation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ProSe bearers are established without network involvement, then setup complexity is reduced and communication speed is improved, but network control capability deteriorates and data rate management becomes uncontrolled
Solution Approach 1:
The network pre-configures ProSe communication parameters including aggregate maximum bit rate (AMBR) limits, TFTs, and packet filters before direct communication begins. This preliminary network involvement ensures control capability is maintained while enabling fast direct setup between WTRUs without real-time network intervention.
Solution Approach 2:
The patent introduces specific parameters (AMBR, TFT, packet filters) that define and control data rates for ProSe bearers. By changing the system from no parameter control to structured parameter-based control, the network maintains authority over data rate management while allowing autonomous bearer establishment.
2Manufacturing precision
If multiple packet filters are evaluated in sequence, then accurate packet routing is achieved, but processing time and complexity increase
Solution Approach 1:
Packet filters and TFTs are pre-configured with evaluation precedence indices during bearer setup. This preliminary organization allows the WTRU to efficiently evaluate packets by following the pre-determined sequence without complex real-time decision logic, reducing processing time while maintaining routing accuracy.
3Ease of operation
If ProSe communication is established without defined discovery dependencies, then communication setup is simplified and faster, but reliability of connection establishment deteriorates
Solution Approach 1:
The patent establishes that discovery must be successfully completed before ProSe communication can be initiated. This preliminary discovery phase ensures that WTRUs have identified each other and established basic connectivity parameters before attempting direct communication, thereby ensuring reliability without complicating the actual communication setup process.
Data Source
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AI summary
Methods and devices are described for communication using proximity services (ProSe). An aggregate maximum bit rate parameter (AMBR) may limit a data rate that may be transmitted by one or more ProSe bearers. A wireless transmit-receive unit (WTRU) may request authorization from the network prior to establishing a ProSe bearer specifying a required quality of service (QoS) or other requirements. Each ProSe bearer may have a corresponding EPS bearer to support service continuity. Packets may be evaluated by a WTRU first using a ProSe check to determine if the packet is destined fo a ProSe bearer and then using a packet filter or filters in order to precedence. Embodiments may include methods of initiation communication after discovery. Embodiments may include methods of maintaining session continuity when traffic is switched between an evolved packet system (EPS) bearer and a ProSe bearer.