Relay Link Change in D2D Wireless Communication
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Solution Overview
Problem
In device-to-device (D2D) relay communication systems, especially in 5G networks, the mobility of terminals leads to frequent link changes, causing packet loss and increased time required for relay link changes, and complicates IP address allocation, disrupting the continuity of relay communication services.
Innovation Solution
A method and apparatus for managing D2D relay link changes by transmitting link change information, performing IP allocation procedures, and using existing IP addresses for seamless communication between relay terminals, including a transmitter and receiver for sending and receiving messages, and a control unit for managing IP allocation and binding updates to prevent packet loss and reduce link change time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D relay link change is performed due to terminal mobility, then communication coverage is extended, but packet loss occurs and connection continuity is disrupted
Solution Approach 1:
The source relay terminal performs preliminary actions by notifying the remote terminal of its intention to release the relay link before actually releasing it. This allows the remote terminal to proactively establish a new relay link with a target relay terminal, ensuring seamless transition and preventing packet loss during the relay link change process
2Adaptability or versatility
If frequent relay link changes occur due to terminal mobility, then communication flexibility is improved, but time required for link change increases
Solution Approach 1:
The invention skips unnecessary waiting and negotiation time by having the source relay terminal proactively notify its release intention. The remote terminal can then directly select and connect to a target relay terminal without prolonged handshaking, significantly reducing the time required for relay link changes while maintaining flexibility
3Ease of manufacture
If IP address reallocation is performed during relay link change, then network management is simplified, but communication interruption occurs
Solution Approach 1:
The invention changes the IP address parameter management approach by maintaining the same IP address for the remote terminal across relay link changes. The source relay terminal notifies the remote terminal of its release intention, and the remote terminal maintains its IP address while establishing a new relay link, thereby simplifying network management while preventing communication interruption
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to an embodiment of the disclosure, in a wireless communication system, a remote terminal transmits a relay request message to a target relay terminal. The remote terminal performs an IP allocation procedure with the target relay terminal. The remote terminal performs relay communication with the target relay terminal on the basis of the IP allocation procedure. The IP allocation procedure is performed using an IP address which has been used in previous relay communication with a source relay terminal.