Multiple access method, device and system

Abstract

Embodiments of the invention provide a multiple access method, a device and a system. The method comprises the steps that network equipment receives a data packet including the identification information of a terminal; a corresponding relationship table of the terminal identification information and a broadcast channel is queried, and the broadcast channel corresponding to the terminal identification information is determined, wherein the determined broadcast channel is one of multiple preset broadcast channels, and the terminal is any one in a terminal group corresponding to the determined broadcast channel; according to the terminal identification information, the data packet is transmitted to the terminal via the determined broadcast channel, so that the terminal demodulates the data packet in accordance with modulation parameters of the determined broadcast channel, thereby enhancing the resource utilization efficiency and reducing the signaling overhead.

Description

technical field [0001] The present invention relates to communication technology, in particular to a multiple access method, device and system. Background technique [0002] In the communication network, multiple access refers to multiple terminals connected to the same transmission medium, for example, wireless transmission uses the free space of electromagnetic wave communication, point-to-multipoint coaxial cable (Coaxial Cable) network, allowing Data streams or signals from multiple terminals share the same transmission medium. [0003] Existing wireless and wired communication systems, multiple access technologies mainly include time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), code division multiple access (Code Division Multiple Access) , CDMA) and Orthogonal Frequency-Division Multiple Access (OFDMA), etc. The multiple access technology mainly divides physical resource...

AI Technical Summary

Problems solved by technology

The multiple access technology mainly divides physical resources into several resource blocks in the time domain, frequency domain, or both in the time domain and frequency domain. The network device allocates resources to each terminal based on the divided resource blocks. The information is sent to the terminal in the form of signaling, which increases the signaling overhead

[0004] In addition, there is a multiple access method in the existing wired communication system, which is to use all physical resources as a broadcast channel, and use the same modulation method and modulation parameters (such as modulation order, such as binary phase) for all terminals. Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), 8QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation), 16QAM, 32QAM, 64QAM, 256QAM, etc.), terminal After demodulating the bit data, obtain the data frame belonging to the terminal in the upper layer (such as the Media Access Control layer (Media Access Control, MAC)), for example, based on the cable television network (Cable TV, Coaxial Cable) Data Over Cable Service Interface Specifications (Data Over Cable Service Interface Specifications, DOCSlS) on CATV) or Ethernet Passive Optical Network (EPON, Ethernet Passive Optical Network) based on passive optical network, however, based on all physical resources as a broadcast channel, for all terminals to use the same modulation method and multiple access method of modulation parameters, so that the system must use the lowest modulation parameters, reducing resource utilization efficiency

[0005] Therefore, the prior art has the problems of low resource usage efficiency and increased signaling overhead

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