Relay UE Resource Pool Indication for D2D
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Solution Overview
Problem
Existing wireless communication systems lack a solution for enabling device-to-device (D2D) communication between a relay UE and a remote UE with limited bandwidth, particularly in scenarios where the remote UE is outside the network coverage, as they cannot obtain information about discovery and communication resource pools.
Innovation Solution
The system employs a relay UE equipped with a processor, memory, and communication modules to generate and transmit indication messages that provide remote UEs with information about resource pools on both anchor and non-anchor carriers, allowing them to establish D2D communication even when outside the network coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a remote UE with limited bandwidth (1 PRB) operates outside network coverage, then it can maintain simplicity and low power consumption, but it cannot obtain information about discovery and communication resource pools
Solution Approach 1:
A relay UE acts as an intermediary between the remote UE and the network. The relay UE receives resource pool information from the network and forwards it to the remote UE, enabling the remote UE to access resource information without directly connecting to the network. This resolves the contradiction by allowing the remote UE to maintain its limited bandwidth operation while still obtaining necessary communication information.
Solution Approach 2:
The relay UE performs preliminary actions by caching and storing resource pool information before the remote UE needs it. The relay UE proactively provides this pre-fetched information to the remote UE, eliminating the need for the remote UE to perform complex network registration procedures while maintaining its simplified operation mode.
2Adaptability or versatility
If existing D2D networks use conventional resource allocation methods, then the system structure remains simple, but remote UEs with limited bandwidth cannot obtain discovery and communication resource pool information
Solution Approach 1:
The relay UE serves as an information intermediary that simplifies the system architecture for remote UEs. Instead of requiring the remote UE to directly query the network for resource information, the relay UE handles this complexity and presents simplified resource pool information to the remote UE, maintaining system simplicity while enabling enhanced remote UE capability.
Solution Approach 2:
The relay UE performs multiple functions: it acts as a network node for resource allocation, a communication bridge for data transmission, and an information relay for resource pool dissemination. This multi-functionality allows a single device to enable D2D communication for remote UEs with limited bandwidth without requiring complex dedicated mechanisms for each function.
Data Source
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AI summary
Methods, apparatus and systems for device-to-device communications are disclosed. In one embodiment, a method performed by a first wireless communication device is disclosed. The method comprises: broadcasting a first message on a first carrier, wherein the first message comprises information about at least one of the following: a first resource pool set on the first carrier, a second carrier, and a second resource pool set on the second carrier, wherein the first resource pool set comprises at least one first resource pool and the second resource pool set comprises at least one second resource pool; transmitting a second message in the at least one first resource pool on the first carrier, wherein the second message comprises information about a second carrier and the second resource pool set on the second carrier; and communicating with at least one second wireless communication device in the at least one second resource pool on the second carrier.