Service Category Table Update via Broadcasting Signals
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Solution Overview
Problem
Existing service search methods in near field communication networks require devices to participate in a network or configure a new one to detect available services, making it difficult to identify and update service category tables efficiently, especially in Device to Device (D2D) direct communication systems.
Innovation Solution
A method and device for acquiring and updating a service category table through receiving broadcasting signals containing version information and provision intentions from neighboring devices, allowing for the identification and connection with devices providing the latest service category table, enabling efficient service discovery and real-time updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If devices participate in a network or configure a new network to search for services, then service detection capability is improved, but network configuration complexity and time consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring service category tables in devices before network participation. These tables contain service information that devices can use immediately upon entering a network, eliminating the need to perform service discovery procedures after network configuration. This resolves the contradiction by enabling service detection without requiring complex post-configuration network setup procedures.
Solution Approach 2:
The patent uses copying by distributing service category table information from one device to another through broadcasting signals. Instead of each device independently discovering services through complex network procedures, service information is copied and shared across devices, simplifying the detection process while maintaining comprehensive service awareness.
2Measurement precision
If devices perform service discovery through network participation, then service information accuracy is improved, but time consumption increases
Solution Approach 1:
Service category tables are prepared in advance and stored in devices before network participation. When devices join a network, they immediately have access to accurate service information without needing to perform time-consuming discovery procedures. This resolves the contradiction by providing both accurate service information and immediate availability.
Solution Approach 2:
The patent implements continuous service information updates through periodic broadcasting of service category tables. Devices continuously maintain up-to-date service information without interrupting their primary functions, ensuring both accuracy and efficiency are maintained over time without significant time consumption.
3Productivity
If devices maintain updated service category tables, then service discovery efficiency is improved, but communication overhead increases
Solution Approach 1:
The patent implements periodic broadcasting of service category tables at predetermined intervals. This allows devices to maintain updated service information for efficient discovery while reducing communication overhead by not requiring continuous or frequent updates. The periodic nature balances information freshness with energy conservation.
Solution Approach 2:
The patent applies discarding and recovering by allowing devices to discard outdated service category table information and recover updated versions through periodic broadcasting. This ensures service discovery efficiency is maintained by having current information while minimizing communication overhead by only transmitting updates when necessary.
Data Source
AI summary
A method for acquiring a service category table required for finding a service includes acquiring information on a latest service category table by identifying version information of a service category table from a broadcasting signal received from adjacent devices during a process of searching for a device supporting a service desired among devices, and acquiring a service category table of a latest version by establishing a session connection with a device supporting the service category table of the latest version based on the information. By acquiring the information on the latest service category table, a session connection with only the device providing the desired service is established so that an optimized session connection establishing process can be performed and a total network capacity can be efficiently managed. Also, the latest service category table can be acquired from the session-connected device, and thus a new service can be easily identified.