ProSe D2D Scheduling Assignment for Service Activation
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Solution Overview
Problem
In device-to-device (D2D) communications, existing methods for establishing proximity services (ProSe) in LTE-Advanced networks require unnecessary energy consumption and resource wastage due to the lack of efficient signaling for application control information in 1:M broadcast communications, where the receiving UE must receive 'un-meaningful' packets before identifying the 'meaningful' packet for service activation.
Innovation Solution
A method and apparatus for compiling and transmitting a message including application control information as part of the scheduling assignment in D2D communications, allowing the receiving UE to determine and complete the service setup efficiently without prior discovery and connection setup, using the access stratum to signal necessary application control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving UE receives all packets in broadcast-based D2D communications to identify the first meaningful packet, then the service can be activated, but energy is wasted receiving un-meaningful packets
Solution Approach 1:
The patent applies preliminary action by having the transmitting UE include application control information in the scheduling assignment message before the receiving UE needs to activate the service. This allows the receiving UE to prepare for service activation in advance without receiving unnecessary packets, thus avoiding energy waste while ensuring reliable service activation.
2Device complexity
If application control information is not included in scheduling assignment, then broadcast-based D2D communications can be simplified, but the receiving UE cannot efficiently determine when service activation is needed
Solution Approach 1:
The patent merges the scheduling assignment message with application control information, combining two previously separate functions into one integrated message. This allows the receiving UE to obtain both scheduling information and application control information simultaneously, eliminating the need for additional signaling messages and reducing service setup time without increasing overall system complexity.
3Ease of operation
If direct over-the-air discovery and connection establishment are assumed in D2D, then service setup is straightforward, but it does not work for broadcast-based 1:M communications without control plane
Solution Approach 1:
The patent makes the scheduling assignment message universal by including application control information within it, enabling the same message structure to serve both unicast and broadcast communication modes. This allows the receiving UE to handle different communication scenarios (direct connection and broadcast) using the same protocol mechanism, enhancing the system's adaptability without complicating the operation.
Data Source
AI summary
The present invention addresses method, apparatus and computer program product for setting up a proximity services device-to-device communication service. Thereby, by a transmitting user equipment, a message including application control information is compiled, a scheduling assignment for scheduling the message transmission is transmitted to a device to be set up, and the message is transmitted to the device according to the scheduling assignment. A receiving user equipment receives a scheduling assignment and at least one of data packets scheduled in the scheduling assignment, determines whether at least one of the received data packets relates to a new proximity services device-to-device communication service traffic flow, determines whether a message including application control information is included in the at least one of the received data packets, and completes the setup based on the application control information.