Network Node D2D Assistance for Non-D2D RAT Coverage
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Solution Overview
Problem
Current wireless communication networks lack the ability to provide network-assisted Device-to-Device (D2D) communication using Radio Access Technologies (RAT) other than those specifically designed for D2D, limiting D2D functionality in areas without LTE coverage.
Innovation Solution
Configuring network nodes with a RAT that cannot be used for D2D communications to provide D2D assistance information, such as network access configuration and Radio Resource Management (RRM) information, to user equipment, enabling network-assisted D2D communication even in non-LTE cellular networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If network nodes are configured with RAT that cannot be used for D2D communications, then network coverage is extended to more areas, but D2D communication capability is lost in those areas
Solution Approach 1:
The patent introduces an intermediary mechanism where a network node configured with non-D2D RAT (such as GSM, WCDMA, or HSPA) provides assistance information to D2D-capable network nodes (LTE eNodeBs). This intermediary allows the non-D2D network to indirectly support D2D communications by sharing necessary assistance information with the D2D-capable network, thus extending network coverage while maintaining D2D functionality.
2Reliability
If D2D communication is restricted to LTE networks only, then D2D functionality is ensured, but network compatibility and versatility are reduced
Solution Approach 1:
The patent implements multi-functionality by enabling network nodes configured with different RATs to participate in D2D communication support. A non-D2D RAT network node can provide assistance information to D2D-capable nodes, allowing the same network infrastructure to serve both traditional communications and D2D communications across multiple RAT types, thus achieving universal support.
3Adaptability or versatility
If UEs fall back to ad hoc mode D2D communication without network coverage, then D2D communication is maintained, but network assistance and control are lost
Solution Approach 1:
The patent applies preliminary action by having the network node pre-determine and provide D2D assistance information to D2D-capable network nodes before D2D communications are established. This advance preparation ensures that when UEs need to communicate, they can immediately utilize pre-configured assistance information from non-D2D RAT networks, maintaining both availability and network control without falling back to pure ad hoc mode.
Data Source
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AI summary
A method performed by a network node (101, 102) for enabling network-assisted Device-to-Device, D2D, communications between user equipments (121, 122) configured to be in a wireless telecommunications network (100) is provided, wherein the network node (101, 102) is configured according to a Radio Access Technology, RAT, that cannot be used for D2D communications. The network node (101, 102) determines D2D assistance information to enable network-assisted D2D communications by the network node (101, 102). The network node (101, 102) then transmits the D2D assistance information to at least one user equipment (121, 122). A user equipment (121), another network node (103) and methods performed therein are also provided.