Coordinated D2D Virtual MIMO Links for Weak-Coverage Terminals
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Solution Overview
Problem
Existing communication networks face issues such as poor network coverage, network congestion, and signal interference, leading to deteriorated user experience and ineffective communication.
Innovation Solution
A communication method involving a terminal device that establishes a primary link with a network side device and detects nearby devices to form a coordinated communication link, using a coordinated communication device to relay data when the primary link is abnormal, employing techniques like short-distance measurement and virtual multiple-input multiple-output connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a primary communication link is established between terminal device and network side device, then direct communication is achieved, but communication reliability deteriorates when network coverage is poor or signal attenuation is large
Solution Approach 1:
The patent introduces a coordinated communication device as an intermediary relay node between the terminal device and network side device. When the primary communication link experiences poor coverage or signal attenuation, data is transmitted through this intermediary device, effectively bypassing the harmful signal degradation and maintaining communication reliability.
Solution Approach 2:
The patent transitions from a single direct communication path to a multi-dimensional communication architecture by establishing both primary and coordinated communication links. This dimensional expansion allows data to traverse alternative paths when the primary path is degraded, resolving the contradiction between direct communication and signal attenuation.
2Reliability
If coordinated communication devices are introduced to improve communication reliability, then communication effectiveness is enhanced, but device complexity increases
Solution Approach 1:
The coordinated communication device performs multiple functions: it acts as a relay for data transmission, provides signal boosting, and enables both primary and coordinated link operations. This multi-functionality reduces the need for separate dedicated components, thereby managing system complexity while enhancing communication effectiveness.
Solution Approach 2:
The patent implements dynamic link selection where the terminal device can switch between primary and coordinated communication links based on real-time network conditions. This dynamic adaptability allows the system to maintain simplicity by using the primary link when available while automatically activating the coordinated link only when necessary, thus balancing reliability improvement with complexity management.
3Productivity
If parallel communication through primary and coordinated links is implemented, then data transmission speed increases, but communication protocol complexity increases
Solution Approach 1:
The patent segments data transmission into parallel flows through primary and coordinated links. By dividing the communication stream and transmitting portions through different paths simultaneously, the system achieves higher aggregate data transmission speed while managing protocol complexity through structured data segmentation and routing.
Data Source
AI summary
This application provides communication methods for a terminal device and a network side device. In an example method, a terminal device establishes a primary communication link with a network side device. The terminal device detects one or more other terminal devices, determines, from the one or more other terminal devices, one or more terminal devices as one or more coordinated communication devices, and notifies the network side device of information indicating that a coordinated communication device is used for coordinated communication. The terminal device establishes a device-to-device (D2D)-based virtual multiple-input-multiple-output (MIMO) communication connection with the coordinated communication device, to form, between the terminal device and the network side device, a coordinated communication link relayed by the coordinated communication device. The terminal device performs parallel communication with the network side device based on the primary communication link and the coordinated communication link, or performs communication based on the coordinated communication link.