Cable Modem Direct Coordination for 5G Small Cell Latency
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Solution Overview
Problem
5G cellular networks face challenges in handling the increased number of smaller cells with higher bandwidth and lower latency requirements, as existing methods from 4G networks are inadequate for these demands, particularly in coordinating data transmission between cells and managing inter-cell interference.
Innovation Solution
The integration of DOCSIS technology with 5G networks using orthogonal frequency-division multiple access (OFDMA) allows direct communication between cable modems, enabling coordination data to be transmitted through allocated resource blocks, facilitating coordinated multi-point operations and reducing latency by bypassing the traditional cable modem termination system (CMTS) for data transfer between modems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data is transmitted from one cable modem to another through the CMTS, then data transmission can be achieved using existing infrastructure, but transmission latency increases and bandwidth efficiency decreases
Solution Approach 1:
The patent extracts the data transmission function from the centralized CMTS and enables direct peer-to-peer communication between cable modems. Cable modems can now exchange coordination data and user data directly over the cable network without routing through the CMTS, thereby reducing latency and improving bandwidth efficiency while maintaining compatibility with existing CMTS infrastructure for management and control functions
Solution Approach 2:
The patent introduces an intermediary addressing mechanism where the CMTS retains its role as a management intermediary but not as a data transmission intermediary. The CMTS allocates resources and manages connections, while direct modem-to-modem transmission paths are established for actual data transfer, separating control functions from data transfer functions
2Productivity
If 4G network methods are used for cell coordination, then existing systems can operate, but they cannot handle the increased number of cells and higher bandwidth requirements of 5G networks
Solution Approach 1:
The patent changes the fundamental parameter of data transmission architecture from centralized (through CMTS) to distributed (direct modem-to-modem). This parameter change enables the network to handle 5G requirements of higher capacity and bandwidth by allowing parallel direct transmission paths between multiple modems, eliminating the bottleneck of centralized processing while maintaining backward compatibility with 4G infrastructure
3Area of stationary object
If smaller cells are deployed to increase network capacity, then coverage can be improved, but the percentage of mobile connections near cell edges increases, leading to higher interference
Solution Approach 1:
The patent implements preliminary coordination between cable modems through direct communication channels. Before data transmission begins, modems exchange coordination data to establish timing synchronization and resource allocation, preventing interference proactively. This preliminary action allows smaller cells to be deployed densely without suffering from edge interference issues, as coordination is established in advance rather than reactively
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances data transmission efficiency, supports the operation of base stations as arrays, improves coverage, and reduces the need for additional base stations by enabling direct communication between cable modems, thus addressing the limitations of 4G networks in meeting 5G requirements.
Implementation Method 1
the cable network interface communicating using orthogonal frequency-division multiple access (OFDMA)
Data Source
AI summary
A cable modem is provided that comprises: a base station interface; a cable network interface that connects the cable modem to a cable modem termination system and one or more other cable modems, the cable network interface communicating using orthogonal frequency-division multiple access (OFDMA); a memory storage comprising instructions; and one or more processors in communication with the cable network interface, the base station interface, and the memory storage. The one or more processors execute the instructions to: receive, via the base station interface, coordination data addressed to a first cable modem of the one or more other cable modems; receive, from the cable modem termination system via the cable network interface, an allocation of a resource block in an OFDMA symbol; and transmit, to the first cable modem via the cable network interface, in the allocated resource block in the OFDMA symbol, the coordination data.