A frequency hopping and time hopping pattern design method suitable for statistical priority multiple access

Abstract

The invention discloses a frequency hopping and time hopping pattern design method suitable for statistical priority multiple access. According to the method, a time axis of a whole network node is synchronously divided into a series of continuous and fixed-length data time frames according to fragment transmission of data packets, the data time frames are further divided into a plurality of pulsetime slots according to fragment sizes, and the number of the pulse time slots and the total number of designable patterns are respectively calculated by considering whether adjacent pulses are overlapped or not. And a basic frequency hopping sequence family is constructed based on a truncated prime number frequency hopping sequence method, and then expansion and truncation are performed on the basic frequency hopping sequence to obtain a frequency hopping sequence family. And frequency points of the frequency hopping sequence are inserted into a time-sequence matrix, and rows, columns and the frequency points of the matrix are randomly arranged to obtain a final frequency hopping and time hopping pattern. The method can effectively avoid data conflict caused by simultaneously sending signals at the same frequency point, and a specific frequency hopping and time hopping pattern realized by numerical simulation in MATLAB proves the effectiveness of the method.

Description

technical field [0001] The invention belongs to the field of wireless networks, in particular to a frequency-hopping and time-hopping pattern design method suitable for statistical priority multiple access. Background technique [0002] TTNT (Tactical Targeting Network Technology), as the advanced tactical data link system of the US military, takes self-organizing interconnection of weapon platforms and ultra-low-latency information distribution as the primary design goals. The data link system adopts a combination method of frequency hopping and time hopping at the physical layer and Statistical Priority-based Multiple Access (SPMA) at the data link layer. Compared with the multiple access protocol of the traditional data link, although the statistical priority multiple access protocol also sends data through time slots, SPMA does not need to reserve and allocate time slots in advance, and different nodes can be in the same time slot Send data within the network, as long a...

AI Technical Summary

Problems solved by technology

In this case, all nodes in the current network use the same family of patterns for synchronous frequency hopping, and different nodes usually use different frequency hopping sequences, so at some point nodes will send data on the same frequency, resulting in group collision

Images