Space division multiple access (SDMA-SPMA) multiple access system

Abstract

The invention discloses a space division multiple access SDMA-SPMA multiple access system, and aims to provide an access system capable of improving the network throughput. The system is realized through the following technical scheme that an SPMA protocol processing unit counts the data volume received by each directional receiving antenna in unit time, and an SDMA signal processing unit carriesout coding, decoding and demodulation on the data sent by the SPMA protocol processing unit and sends the receiving and sending data to a network member; each network member calculates the network load through the interaction of the channel statistical messages, and the node obtains the delay of sending the messages by the node in the next channel statistical period by using the respectively calculated network load lookup table, wherein a mapping table between the network load and the channel access time delay is obtained through initialization loading at the SPMA protocol processing unit; andthe network member periodically calculates the network load, inquires the mapping table of the network load and the channel access delay to obtain the channel access delay of the node, and the node calculates the message sending opportunity according to the channel access delay.

Description

technical field [0001] The invention relates to the field of network access, in particular to a SPMA multiple access system with space division and a multiple access technology suitable for ad hoc networks. Background technique [0002] With the development of information science, traditional centralized networks can no longer meet the needs of sensor networks. In this case, the distributed self-organizing network with strong flexibility and high reliability has received great attention. The distributed self-organizing network has the following characteristics: self-organizing: the nodes in the distributed network are peer-to-peer, and there is no central node responsible for network management. The distributed network does not need to be planned in advance, and the nodes have the ability to access the network at any time. Distributed networks allow nodes to have high mobility, that is, they can withstand rapid changes in network topology; multi-hop routing: nodes in a dis...

AI Technical Summary

Problems solved by technology

When the channel capacity is constant and the number of neighbors sharing the channel decreases, the amount of data that can be sent by a single node increases, thereby increasing the total throughput of the network

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