US 11,758,407 B2
Construction method of TFDMA random self-organizing ad hoc network
Li Peng, Hubei (CN)
Assigned to HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed by HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Hubei (CN)
Filed on Jun. 20, 2021, as Appl. No. 17/352,337.
Claims priority of application No. 202010569496.X (CN), filed on Jun. 20, 2020.
Prior Publication US 2021/0368346 A1, Nov. 25, 2021
Int. Cl. H04W 16/02 (2009.01); H04L 5/00 (2006.01); H04L 27/32 (2006.01); H04W 72/0446 (2023.01); H04W 74/08 (2009.01); H04W 84/18 (2009.01)
CPC H04W 16/02 (2013.01) [H04L 5/0005 (2013.01); H04L 27/32 (2013.01); H04W 72/0446 (2013.01); H04W 74/0833 (2013.01); H04W 84/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A time-frequency division multiple access (TFDMA) random self-organizing ad hoc network construction method, comprising:
dividing spectrum resources of full frequency domain and full time domain resources in 24 hours a day occupied by a network system, wherein first, the divided frequency domain and time domain units are constructed into a period-frequency slot epoch-ring net, and then N period-frequency slot epoch-ring nets are stacked into a cylindrical web according to a time slot alignment principle, and finally U cylindrical webs are formed into the time-frequency division multiple access random self-organizing ad hoc network that covers the full frequency domain and the full time domain, the specific steps of network construction are as follows:
the full frequency domain resources are a total frequency spectrum allocated to the TFDMA ad hoc network, W is set to represent a bandwidth of the total frequency spectrum, and the total frequency spectrum of the network system with bandwidth W is divided into N sub-channels, Δf is set to represent a bandwidth of each sub-channel, Δf=fi−fi-1, i=1, 2, . . . , N, then, the TFDMA ad hoc network comprises N hopping points fi or N sub-channels center frequency fci=fc+i·Δf, N=W/Δf, wherein Δf is called a frequency slot or a frequency chip, and a first center frequency is fc=f0=fc0;
the full-time domain resources in 24 hours a day is divided as follows, 24 hours are divided into U epochs, each epoch determines one cylindrical web, thereby determining the minimum loop time of one TFDMA ad hoc network; one epoch is divided into V time frames, each of the time frames is a basic time unit of a time division multiple access mode, one time frame is divided into S time slots, and each of the time slots is a basic time unit of the TFDMA ad hoc network which one user terminal can assess, one time slot is divided into E time chips, each of the time chips is time occupied by a pulse symbol packet with a definite or adjustable duty cycle, which is also a duration of a symbol in a codeword in a permutation group code,
the period-frequency slot epoch-ring net, referred to as an epoch-ring net or a subnet, is determined by a period of the U epochs combined with a frequency slot Δf, specifically, a last time slot of V·S time slots in an epoch is connected to a first time slot to form a period-frequency slot epoch-ring net formed by the V·S time slots and the frequency slot Δf, which is also called a time slot-frequency slot epoch-ring net, or epoch-ring net for short, the network system comprises a total of N epoch-ring nets that can operate independently, each epoch-ring net is allocated a determined frequency hopping point or a center frequency of a sub-channel;
the cylindrical web is formed by stacking the N independently operable epoch-ring nets into a cylindrical web in a manner that time slots are aligned; when each corresponding time slot of the N epoch-ring nets is aligned, the web contains V·S time slices, and each of the time slices is composed of a time slot and N frequency slots;
the TFDMA ad hoc network is composed of U cylindrical webs, that is, one web is repeatedly used for U times, thereby forming a time-frequency division multiple access self-organizing network covering the full frequency domain and the full time domain.