Base Station Multicast Transmission Optimization
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Solution Overview
Problem
Current wireless network technologies face challenges in minimizing power consumption, especially in multicast environments where robust modulation and coding schemes lead to higher resource usage and energy consumption, making it difficult to achieve energy-efficiency, especially for delay tolerant data.
Innovation Solution
The solution involves optimizing multicast transmissions in a device-to-device (D2D) environment by reducing the load on base stations (BS) through a combination of macro and D2D multicast communications, where BSs estimate physical layer parameters to minimize resource usage and power consumption, and define roles for user equipment (UEs) to forward delay tolerant data, thereby reducing the direct coverage area of BSs and overall network power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust modulation and coding schemes are used in multicast environments, then transmission reliability is improved, but power consumption and resource usage increase
Solution Approach 1:
The patent introduces relay UEs as intermediary nodes to forward multicast data. These relay UEs receive data from the base station and retransmit to target UEs, allowing the base station to use simpler modulation schemes while maintaining reliability through cooperative transmission. The relay mechanism distributes the transmission burden and enables more energy-efficient operations at the base station.
Solution Approach 2:
The patent segments the multicast transmission task by dividing UEs into different groups: those receiving directly from the base station and those receiving via relay UEs. This segmentation allows the base station to optimize its transmission parameters for a reduced set of direct recipients, thereby reducing overall power consumption while maintaining service coverage through the relay infrastructure.
2Reliability
If base stations provide direct coverage to all user equipments, then service coverage is maintained, but power consumption increases
Solution Approach 1:
Relay UEs serve as mobile intermediaries that extend the base station's coverage area. By selecting certain UEs to act as relays, the base station can reduce its direct transmission power while ensuring continued service coverage through the relay network. The relay UEs are strategically chosen based on their location and capability to forward data effectively.
Solution Approach 2:
The system enables UEs to serve themselves and others by functioning as relay nodes. Instead of relying solely on the base station for all transmissions, UEs with good signal conditions can help forward data to other UEs in poorer coverage areas, creating a self-organizing extended coverage network that reduces base station power requirements.
3Productivity
If device-to-device communication is implemented for forwarding data, then base station load is reduced, but network complexity increases
Solution Approach 1:
The patent introduces a base station controller that manages the D2D communication infrastructure. This controller handles relay UE selection, resource allocation, and coordination, thereby abstracting the complexity from individual UEs and the base station. The control plane manages the complexity while the user plane benefits from simplified direct transmissions between UEs.
Solution Approach 2:
The relay UE functionality is designed to be universal and configurable. UEs can dynamically switch between acting as regular recipients and relay nodes based on network conditions and requirements. This multi-functionality reduces the need for dedicated relay hardware and simplifies the overall system architecture by using existing UE capabilities for multiple purposes.
Data Source
AI summary
Various communication systems may benefit from optimized transmissions. A method can include receiving data to be forwarded to a first wireless device. The method can also include determining the data as delay tolerant data. Moreover, the method can include defining a role of at least one second wireless device for forwarding the delay tolerant data. Also, the method can include transmitting the delay tolerant data to the second wireless device to be forwarded to the first wireless device.