D2D Relay Communication Using Directional Counter Information
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently relaying device-to-device (D2D) signals based on counter information configured for each signal direction, which affects transmission efficiency and coverage.
Innovation Solution
A method for performing D2D relay communication by a user equipment (UE) that involves receiving a signal with counter information, determining transmission directions by comparing counter comparison values and counter values, and transmitting a relay signal in those directions, with the option to include counter information in the relay signal and adjust counter values based on predetermined settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D relay communication is performed without direction-based counter information, then relay operations can be performed in all directions, but unnecessary relay operations occur and network resources are wasted
Solution Approach 1:
The patent segments the relay operation by introducing direction-specific counter information. Each direction (e.g., forward and backward directions in V2X communication) has its own counter value and counter comparison value, allowing independent control of relay operations in each direction. This segmentation enables the system to perform relay operations only in directions where the counter value is less than the counter comparison value, avoiding unnecessary relay operations in other directions and thus improving efficiency while reducing network resource waste.
2Productivity
If counter information is configured for each signal direction, then unnecessary relay operations are reduced, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring counter information (counter values and counter comparison values) for each signal direction before relay operations begin. This pre-configuration allows the relay UE to quickly determine whether to perform relay operations in specific directions without complex real-time calculations, thereby reducing system complexity while maintaining high relay operation efficiency.
3Area of stationary object
If beamforming is applied to relay signals in multiple directions, then coverage is extended, but transmission power requirements increase
Solution Approach 1:
The patent applies local quality by using beamforming to concentrate transmission power in specific directions where relay operations are needed. Instead of transmitting power uniformly in all directions, the system directs beamformed signals only toward UEs in directions where the counter value is less than the counter comparison value. This localized power transmission extends coverage area in needed directions while reducing overall power consumption compared to omnidirectional transmission.
Data Source
AI summary
Provided are a method and an apparatus for performing device-to-device (D2D) relay communication according to various embodiments. Disclosed are the method and the apparatus for performing device-to-device (D2D) relay communication, the method comprising the steps of: receiving a first signal that is beamformed and including counter information and a message, the counter information including at last one counter comparison value established for each direction and at least one counter value; and comparing the at least one counter comparison value established for mutually corresponding directions and the at least one counter value to determine at least one transmission direction, and beamforming a second signal for relaying the message for each of the at least one transmission direction and transmitting same, wherein the second signal includes the counter information in which a counter value corresponding to a transmission direction from among the at least one counter value is modified by a predetermined value, when transmitted in one direction among the at least one transmission direction.