D2D Content Publishing for Guaranteed QoS
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Device-to-Device (D2D) communication systems, there is a challenge in ensuring proper resource allocation and secure operation without operator network control, leading to difficulties in obtaining Quality of Service (QoS) information and providing guaranteed services.
Innovation Solution
A content publishing method where user equipment supporting D2D functions obtains and broadcasts resources for information, including identifiers, service information, and application layer service information, allowing matched terminals to establish connections with network-side devices and obtain QoS information, thereby ensuring guaranteed services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D terminal actively senses radio resources and autonomously manages resources without operator network control, then device autonomy and flexibility are improved, but resource allocation efficiency and network security deteriorate
Solution Approach 1:
The patent introduces a content server as an intermediary component that bridges D2D terminals and the operator network. The content server receives QoS information from the operator network and publishes it to D2D terminals, enabling autonomous devices to access network-controlled resource allocation data without requiring direct operator control over each device. This resolves the contradiction by maintaining device autonomy while ensuring reliable resource allocation through the intermediary content server.
2Ease of operation
If D2D terminal operates without authentication and certification of operator network, then operation simplicity is improved, but network security and proper resource allocation deteriorate
Solution Approach 1:
The patent implements preliminary authentication and certification by the operator network before D2D terminals can access QoS information. The operator network authenticates terminals in advance, and only authenticated terminals can retrieve QoS parameters from the content server. This ensures network security and proper resource allocation while maintaining operational simplicity for legitimate users, as the authentication process is transparent and automated.
3Productivity
If D2D system shares resources with cellular system, then spectrum utilization is improved, but resource interference and allocation complexity increase
Solution Approach 1:
The patent segments resource allocation into two distinct parts: QoS parameter management remains with the operator network, while actual resource selection and transmission are performed autonomously by D2D terminals based on published QoS information. This segmentation allows spectrum sharing between cellular and D2D systems without increasing overall allocation complexity, as each entity handles only its designated portion of the allocation process.
4Reliability
If matched terminal needs to obtain QoS information from operator network, then service quality assurance is improved, but connection setup complexity and time increase
Solution Approach 1:
The operator network performs preliminary actions by pre-calculating and publishing QoS information to the content server before D2D communication occurs. When terminals need QoS information, they can retrieve it directly from the content server without establishing time-consuming connections to the operator network. This preliminary publication of QoS data ensures service quality assurance while minimizing connection setup time.
Solution Approach 2:
The content server acts as an intermediary that caches QoS information from the operator network and makes it readily accessible to D2D terminals. Terminals obtain QoS parameters through the content server rather than direct operator network connections, significantly reducing connection setup time while maintaining service quality assurance through the operator-controlled content server.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Embodiments of the present invention provide a content publishing method and a user equipment. The content publishing method includes: obtaining, by a first user equipment supporting a device to device D2D function, a resource for broadcasting information of the first user equipment, where the information of the first user equipment includes one or a combination of an identifier, service information, a service code, and application layer service information of the first user equipment; and broadcasting, by the first user equipment, the information of the first user equipment on the obtained resource, so that a second user equipment supporting the D2D function obtains the information of the first user equipment and after being matched with the first user equipment successfully, sends the information of the first user equipment to a network-side device to set up a connection with the first user equipment. According to the embodiments of the present invention, a matched terminal can obtain QoS information, and guaranteed services can be provided for D2D communication.