D2D Resource Configuration via System Broadcast in Heterogeneous Networks
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Solution Overview
Problem
In cellular communication systems, direct Device to Device (D2D) communication between User Equipments (UEs) is not supported without prior resource configuration, and existing D2D communication technologies rely on unmanaged unlicensed bands, limiting their application scope.
Innovation Solution
A method and system where UEs receive and store D2D communication resource configuration information through a system broadcast message, including channel configuration and Public Land Mobile Networks (PLMNs) identifiers, enabling D2D communication by notifying UEs of the necessary resources for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is introduced to mobile communication operator network, then direct communication between UEs is enabled, but resource management and control complexity increases
Solution Approach 1:
The network operator acts as an intermediary to manage and control D2D communication resources. The network provides resource configuration information to UEs through system information blocks, enabling direct communication while maintaining centralized resource management. This resolves the contradiction by introducing a mediating entity that handles the complexity of resource allocation.
Solution Approach 2:
The network pre-configures D2D communication resources and provides resource configuration information to UEs before actual D2D communication occurs. This preliminary resource allocation simplifies the communication process during actual D2D operation, as UEs can directly use the pre-allocated resources without complex real-time negotiations.
2Adaptability or versatility
If UEs are required to obtain D2D communication resource configuration information in advance, then D2D communication can be supported, but system complexity and configuration overhead increase
Solution Approach 1:
The system uses existing system information block structures to carry D2D resource configuration information, making the configuration mechanism universal and integrating it into the existing LTE system framework. This approach allows D2D communication support without creating entirely new configuration protocols, thereby reducing system complexity.
Solution Approach 2:
The network operator serves as an intermediary that automatically provides resource configuration information to UEs through broadcast system information. This eliminates the need for complex peer-to-peer negotiation between UEs, as the network mediator handles all configuration distribution, simplifying the overall system architecture.
3Ease of operation
If pure D2D communication is performed over unlicensed band resources without network management, then implementation simplicity is achieved, but application scope is limited
Solution Approach 1:
The network operator acts as a mediator that provides resource configuration information to UEs, enabling licensed band D2D communication. This approach maintains implementation simplicity for UEs (they just need to follow network-provided configurations) while expanding application scope by allowing operation in licensed bands with broader coverage and more reliable service.
Solution Approach 2:
The system changes the frequency band parameter from unlicensed to licensed bands, and introduces network-managed resource configuration parameters. This parameter change expands the application scope by enabling D2D communication in licensed bands with better coverage and quality of service, while the network handles the complexity of resource management.
Data Source
AI summary
Disclosed are a method, system and device for data transmission in the access point handover process, which is used to solve the problem existing in the prior art that interrupt delay of data plane will be increased when the access point handover is carried out in the case of heterogeneous network. The method of the embodiment of the present invention comprises: a user equipment determines that in the case that Radio Resource Control (RRC) connection remains the same, all or part of the Data Radio Bearers (DRBs) reconfigured from one cell to another cell is needed; the user equipment, in the access point handover process, transmits data through the original DRB, and the original DRB is the last used DRB before the data plane access point handover. The user equipment, during the access point handover process, transmits data through the original DRB, thereby reducing the interrupt delay of the data plane when the access point handover is carried out in the case of heterogeneous network, and further improving the handover efficiency and shortening the data transmission time.