Resource Indication for Bandwidth-Limited Remote Device Discovery
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Solution Overview
Problem
In enhanced device-to-device (FeD2D) communication systems, bandwidth-limited remote devices face challenges in discovering resources for transmitting and receiving information, leading to prolonged discovery times and energy inefficiencies due to limited bandwidth and inability to receive downlink data through side links.
Innovation Solution
An electronic device generates and transmits resource indication information to indicate available resources for discovery, allowing bandwidth-limited remote devices to learn about resource availability, thereby shortening discovery times and conserving energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the relay device transmits discovery information using resources beyond the reception bandwidth of the remote device, then the discovery process can be completed, but the remote device cannot receive the discovery information leading to prolonged discovery time
Solution Approach 1:
The network side device performs preliminary action by determining in advance which resources the remote device can receive and uses this information to select appropriate resources for transmitting discovery information, ensuring the remote device can successfully receive the information without prolonged search time
Solution Approach 2:
The system implements feedback by having the remote device report its reception bandwidth to the network side device, which then uses this feedback information to select suitable resources for discovery information transmission, ensuring efficient discovery within the remote device's bandwidth capabilities
2Reliability
If the remote device monitors all frequency bands for discovery information, then complete discovery is achieved, but energy consumption increases due to bandwidth limitations
Solution Approach 1:
The system applies local quality by tailoring the discovery information transmission to match the remote device's specific reception bandwidth capabilities, ensuring reliable discovery within the constrained frequency band rather than requiring monitoring across all frequency bands
Solution Approach 2:
The network side device changes the transmission parameter (resource selection) based on the remote device's reception bandwidth parameter, dynamically adjusting which resources are used for discovery information transmission to match the remote device's energy-efficient monitoring capabilities
3Ease of operation
If the remote device of the second type uses conventional discovery process, then the process is simple, but the remote device cannot receive downlink data through side link resulting in inefficiency
Solution Approach 1:
The system achieves universality by developing a resource indication mechanism that works for both first type remote devices (with side link capability) and second type remote devices (without side link capability), allowing the same discovery process to serve different device types while maintaining communication efficiency
Data Source
AI summary
The present invention relates to an electronic device in a wireless communication system, and a wireless communication method. The electronic device in a wireless communication system of the present invention comprises: a processing circuit configured to generate resource indication information for indicating resources carrying discovery information; and a transceiver circuit configured to send the resource indication information. The electronic device and the wireless communication method of the present invention can implement a discovery process of a bandwidth-limited remote device, shorten discovery time, and save energy of the remote device and a relay device.