ProSe Capability Indication in Wireless Communication Systems
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Solution Overview
Problem
Conventional wireless communication systems face challenges in determining the feasibility of ProSe communication within the Evolved Packet System (EPS) and ensuring that all network entities support ProSe features, as well as discovering and initiating ProSe communication between ProSe-enabled mobile devices in proximity.
Innovation Solution
A method is introduced where a network entity indicates ProSe capability to mobile devices through attach or tracking area update messages, and ProSe-enabled mobile devices select base stations that support ProSe capabilities, with ProSe application servers managing user registration and proximity services to facilitate direct device-to-device communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional data path routing via operator network is used, then network control and security are maintained, but communication latency increases and local optimization is lost
Solution Approach 1:
The patent extracts the user plane data path from the core network and places it locally at the eNB. The eNB creates a local gateway function that handles ProSe communication directly between UEs without routing data through the operator's core network, thereby reducing latency while maintaining control plane security.
Solution Approach 2:
The patent segments the communication path into control plane (remaining in core network) and user plane (localized at eNB). This segmentation allows different parts of the system to be optimized independently - control maintains security while user data enjoys fast local routing.
2Adaptability or versatility
If ProSe capability indication is added to attach and TAU messages, then network entities can support ProSe features, but signaling message complexity increases
Solution Approach 1:
The patent adds ProSe capability indication to existing attach and TAU messages that already serve multiple purposes (network attachment, location updating). This avoids creating separate dedicated signaling messages for ProSe capability exchange, thereby maintaining versatility while minimizing additional signaling complexity.
3Productivity
If direct device-to-device communication path is established, then communication efficiency improves, but network control and security management become more challenging
Solution Approach 1:
The eNB acts as an intermediary local gateway that facilitates direct UE-to-UE communication while maintaining network control. The eNB receives data from the core network and locally routes it to the target UE, or receives data directly from UEs and forwards to the core network, thereby enabling efficient D2C communication while simplifying network control compared to direct peer-to-peer routing.
Data Source
AI summary
A method of handling proximity service (ProSe) in a wireless communication system is disclosed. The method includes transmitting, by a mobile device of the wireless communication system, a request message to one of the plurality Mobility Management Entities (MMEs) of the wireless communication system, for requesting a proximity service (ProSe) service; and indicating, by the one of the plurality of MMEs, to the mobile device a ProSe capability of a system network of the wireless communication system in an accept message.