Method and network for sending multiple signals

Abstract

Spread spectrum systems are used to transmit data to and from devices in a distributed system that are capable of operating as sensors and actuators. Communication occurs through a series of aggregation nodes in a branched hierarchical network. Each device and aggregation node has a corresponding spreading code and in the central control system 4 a corresponding encoder / decoder (401, 402, . . . , 252, 352, 452, 552) operating on the same spreading code, with The device-dependent coded data is aggregated over a shared channel. At each level of the hierarchy, the aggregated signal to / from the next level is re-encoded. This allows the same code (153, 253) to be reused at different levels and in different sub-branches of the same level, thereby increasing the number of devices that can be served on one channel.

Description

technical field [0001] The present invention relates to data management systems, and in particular to processing data generated by sensors and sent to a system management processor. Such data is increasingly used for the interconnection of computing devices embedded in everyday objects via the Internet (enabling computing devices to send and receive data)—the so-called "Internet of Things (IoT)". Background technique [0002] The Internet of Things has been defined as "a network of physical devices, vehicles, buildings, and other objects embedded with sensors and actuators, with network connections that enable these objects to collect and exchange data." A core requirement of the IoT is the ability of sensors to send collected data to remote systems that process and store the data. Meanwhile, the IoT control and management system needs to send commands to actuators to operate devices, such as turning on or off lights, and to sensors, such as changing the configuration of th...

AI Technical Summary

Problems solved by technology

However, as mentioned above, the separation of uplink and downlink channels for both TDD and CDMA can inefficiently use bandwidth where traffic is often asymmetric

The division of time between uplink and downlink also increases the length of the duty cycle because each end of the link is essentially idle half the time (in receive-only mode)

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