CN106454873A - Self-organized terahertz network-orientated auxiliary type directed communication method and network architecture thereof - Google Patents
Self-organized terahertz network-orientated auxiliary type directed communication method and network architecture thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a self-organized terahertz network-orientated auxiliary type directed communication method which comprises the following steps: a common node acquires own position information in a way of communicating with an anchor node all round; when needing to send data, a sending node avoids a distributed inter-frame spacing first, then starts to monitor an adopted low-frequency channel, and if the channel is occupied, avoids until the channel is empty; the sending node sends an extended request sending frame to a receiving node through a low-frequency all-round antenna, and the receiving node returns a clearing sending frame with the own position information and antenna information to the sending node; the two nodes carry out calculation to obtain a direction and a beam width of the antenna; the sending node sends a test frame to the receiving node through a directed terahertz antenna after waiting an antenna conversion time; after data sending is completed, the receiving node returns an ACK again; and if the sending node receives the ACK successfully, the whole sending process is completed. The invention further discloses network architecture for implementing the method.
Description
Technical field
The invention belongs to Terahertz (THz) network data exchange technical field, particularly to one kind towards self-organizing terahertz
Hereby the oriented communication technology of the assist type of network to be to improve the transmission range of node and the method for transmission performance, for the network of movement
The self-organizing Terahertz network architecture that node is formed, solves oriented antenna match between node by omnidirectional's LF communication technology auxiliary
Problem, with realize propose the oriented communication means of efficient, energy-conservation, high speed assist type.
Background technology
With the development of Internet technology and science and technology, creating substantial amounts of data in life needs to swap and transmit.
In the past few decades, wireless data transmission rate doubles the growth that could meet data explosion formula, root in every 18 months
According to such trend, in the near future, being wirelessly transferred speed needs to reach too bit (Terabyte, TB) per second and can expire
The needs that foot uses.However, this speed has exceeded traditional wireless communication frequency (2.4GHz and 5GHz) from far away can reach
The flank speed arriving, has been even more than the maximal rate of the focus millimetre-wave attenuator (30-300GHz) of nearest research.Therefore, promote
Researcher is made constantly to explore higher frequency, the communications band of higher rate and corresponding solution.Under this kind of background, terahertz
Hereby frequency range because of its altofrequency, low energy consumption, good directionality the features such as be suggested and can be applicable in ultrahigh speed wireless communication technology.
With the development of Terahertz Technology and related software and hardware technology, Terahertz communication will become a kind of possible.However,
Some characteristics in Terahertz frequency range lead to its transmission range extremely limited, are on the one hand because the frequency pole of Terahertz frequency range
Height, during propagating, propagation loss ratio is larger, and its signal attenuation of increase with distance can be gradually increased；On the other hand,
Terahertz frequency range is affected larger by the molecule absorption of in the air, and especially hydrone is stronger to the absorptance of Terahertz frequency range,
Lead to the path loss of Terahertz larger.In order to solve this problem, by high-gain, high directivity oriented antenna applications to too
In hertz node, oriented antenna can help strengthen Terahertz transmission signal, increases transmission range.
In traditional LF communication system, there is the example of oriented antenna applications, and had the researcher design of correlation
Corresponding MAC layer (Media Access Control, MAC) communication means, but these methods inapplicable
In Terahertz network, main cause is traditional oriented transmission technology and communication means is all built upon link signal and at least covers
On the basis of one node of lid.However, in Terahertz network, due to high path loss and the oriented sky of Terahertz frequency range
The high directivity of line, may lead to the not enough situation that cannot complete communication coupling and between node of node-node transmission distance to occur.There is phase
Close researchs and proposes in centralized network, and ordinary node passes through a kind of " rotation " antenna and by Handshake Protocol to centromere
The mode of point transmission information solves the problems, such as node communication coupling.But in ad hoc networks, there is mobility in node, and
There is not Centroid, the method therefore " rotating " antenna is very limited in ad hoc networks, so needing a kind of new side badly
Method is realizing the high-rate information transmission between Terahertz node.
Because the high path loss of Terahertz frequency range leads to node-node transmission apart from short, difficult communication it is necessary to increase using high
The beam shaping oriented antenna auxiliary of benefit is communicated.However, the Terahertz network node being equipped with oriented antenna cannot solve very well
Certainly sending node adjusts its own antenna direction according to receiving node position and its antenna direction in time thus the problem matched；
Meanwhile, the problem of self-position cannot be obtained very well for general network framework interior joint, design is towards self-organizing Terahertz net
The oriented communication means of assist type of network and its network architecture.
Content of the invention
The present invention will overcome the problems referred to above of prior art, provides a kind of assist type towards self-organizing Terahertz network to have
To communication means and its network architecture.
The described network architecture is self-organizing network, and such as Fig. 1 is the network architecture realizing the inventive method, comprises in network
There are anchor node and ordinary node.Anchor node as positioning auxiliary node univesral distribution in certain region, by be equipped with GPS mould
Block or the mode that manually sets obtain own location information, help ordinary node to realize positioning by omnidirectional's LF communication technology and have
To the beam angle of antenna and the adjustment in direction；Ordinary node is randomly dispersed in certain area, and the omnidirectional using low-frequency range leads to
Letter technology realizes the exchange of control information, and sets up the communication between node, carries out the information of high speed using oriented Terahertz antenna
Transmission.
Preferably, the frequency usage of described low-frequency range but be not limited only to 2.4GHz and 5GHz；Described Terahertz frequency range
Frequency includes but are not limited to 0.1-10THz.
Preferably, in the case of ensureing that anchor node can cover all ordinary nodes, it is used for auxiliary in two dimensional surface environment
The anchor node quantity helping positioning can not be less than 3, and in three-dimensional environment, anchor node number can not be less than 4.
The oriented communication means of assist type towards self-organizing Terahertz network of the present invention comprises the steps：
Step 1.1：Ordinary node by obtaining the positional information of itself with anchor node directional communication；
Step 1.2：When sending node needs to send data, keep out of the way a distributed inter-frame space first, then begin to
Intercept adopted low frequency channel, if channel is occupied, kept out of the way until channel idle；
Step 1.3：Sending node first passes through the request to send frame (Request that low frequency omni-directional antenna sends an extension
To Send of Node Information, RTS-NI) give receiving node, comprise in this frame sending node positional information and
The direction of its oriented Terahertz antenna, specific frame format is as shown in Figure 2.After receiving node receives RTS-NI frame, return one
The Clear to Send frame (Clear to Send of Node Information, CTS-NI) of extension gives sending node, CTS-NI frame
In comprise the positional information of receiving node and its direction of oriented Terahertz antenna；
Step 1.4：Two nodes obtain direction and the beam angle of antenna after calculating, and wherein reach receiving node
Watt level must is fulfilled for below equation：
Wherein d is the distance between two nodes, and c is the light velocity,For noise power, SNRminFor minimum signal-noise ratio threshold
Value, StF () is the power spectral density of sending node, kabsF () is the molecule absorption factor.Define the fixing field angle of aerial array
Spend for ΩA, the directivity of oriented antenna is represented by：
Wherein θhAnd φhIt is respectively horizontal angle and the elevation angle of half-power beam width.
Step 1.5：Sending node waits an antenna conversion time, subsequently passes through oriented Terahertz antenna and sends a frame survey
Examination frame (Test to Send, TTS) give receiving node, if receiving node do not return acknowledgement frame (Acknowledgement,
ACK) or sending node is not properly received the ACK frame of return and then represents connection failure, and repeat step 1.1, until reaching
Set up the upper limit connecting number of times；Conversely, then sending node begin through oriented Terahertz antenna start send data.
Step 1.6：After sending ED, receiving node again returns to an ACK, if sending node is properly received,
Whole transmission process terminates, if receiving node does not return ACK or sending node does not receive ACK, carries out data weight
Send out, until reaching the number of retransmissions upper limit, Fig. 3 gives the main process of two steps.
Preferably, ordinary node is communicated with anchor node at set intervals by the omnidirectional antenna of low-frequency range, with more
The new positional information of itself is it is ensured that the accuracy of front position in upper once communication.
Preferably, distributed inter-frame space is set to 34 μ s, specifically can be entered according to the frequency that antenna adopts and information rate
Row adjustment.
Preferably, before node sends data, whether occupied, if occupied, need to open if needing to intercept low frequency channel
With a back off time, this back off time mechanism uses binary system back off algorithm, but is not limited only to this.
Preferably, ordinary node adopts identical oriented Terahertz antenna, but can be adjusted according to practical situation.
Preferably, request to send frame RTS-NI and Clear to Send frame CTS-NI include frame control, persistent period, source address
With information such as destination address information, sequence control, node location information, aerial information and Frame Check Sequences, but it is not limited only to this.
Preferably, send request to same receiving node if there are two and above sending node, then this is many simultaneously
Individual sending node obtains transmission route by way of competition, and the node of competition failure will wait after a back off time again at random
Send.
The invention provides towards the oriented communication means of assist type of self-organizing Terahertz network and its network architecture, described
The network architecture is self-organizing network framework, has used low-frequency range directional communication technology and oriented THz communication technology simultaneously.Net
Anchor node and ordinary node, wherein anchor node is included as positioning auxiliary node, by LF communication technology side of omnidirectional in network
Ordinary node is helped to realize positioning and the beam angle of oriented antenna and the adjustment in direction；Ordinary node uses low frequency omni-directional communication skill
Art and other nodes realize the exchange of control information, and set up the communication between node, are carried out at a high speed using oriented Terahertz antenna
Information transmission.Compared to common antenna, oriented antenna directivity is good, high gain, can make the transmission of terahertz signal
More stable, transmission range is farther, but because the high directivity of oriented antenna makes node be difficult to match, therefore devises
Low frequency omni-directional antenna is used as the method for auxiliary positioning.Low frequency omni-directional antenna is believed in order to the position of transmission node and sky line traffic control
Breath is to solve the problems, such as antenna pair, and passes through rational communication mechanism, realizes the high-speed communication between node.
It is an advantage of the invention that：On the one hand solve that Terahertz transmission range is short, orientation node communication coupling is difficult, expansible
Property difference the problems such as, on the other hand significantly improve Terahertz channel utilization and network throughput.
Brief description
Fig. 1 is the schematic diagram of the Terahertz communication self-organizing network framework of the present invention.
Fig. 2 is the schematic diagram of the form of each Frame of the present invention.
Fig. 3 is method of the present invention flow chart.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to
This.
Ordinary node and anchor node is comprised, wherein ordinary node has low frequency omni-directional antenna in the network architecture shown in Fig. 1
With oriented Terahertz antenna, anchor node only has low frequency omni-directional antenna, and ordinary node obtains positional information by anchor node, common saves
Communicated by way of self-organizing between point, with other nodes, the position of other side and oriented antenna are obtained by directional communication
Directional information, carries out the transmission of data by oriented Terahertz antenna.
The head of each frame shown in Fig. 2 and afterbody are all unified, and head is mainly by frame control, persistent period, address
Information, sequence control composition, the wherein classification of frame control information determination data frame, the persistent period represents this Frame in a network
Time-to-live, address information includes sending node and receiving node unique identities coding in a network, and sequence control controls
The sequence of Frame.The CRC check code that the Frame Check Sequence of afterbody includes 32 is used for whether just checking the Frame receiving
Really.RTS-NI and CTS-NI frame format is basically identical, carries positional information and the antenna of sending node and receiving node respectively
Information, TTS frame only carries random test data.
In described Frame, frame control accounts for 2 bytes, and the persistent period accounts for 2 bytes, and address information accounts for 6 to 12 as needed
Individual byte, sequence control accounts for 2 bytes, and Frame Check Sequence accounts for 4 bytes.Each space coordinates of RTS-NI and CTS-NI are respectively
Account for 2 bytes, aerial information accounts for 4 bytes.In TTS frame, test data accounts for 4 bytes.
Whole communication process shown in Fig. 3 is divided into two stages, and the stage 1 is the friendship being controlled information in low frequency band
Change, the stage 2 is to carry out data transmission under Terahertz frequency range.Wherein TDIFSAnd TSIFSIt is respectively distributed interframe gap and the shortest
Interframe space time, TBFFor back off time, TRTS-NIFor propagating the time that a frame RTS-NI frame needs, TpropFor sending node and
Propagation delay between receiving node, TCTS-NIFor propagating the time that a frame CTS-NI frame needs, TswitchSwitch to too for node
The time that hertz communication needs, TTTSFor propagating the time that a frame TTS frame needs, TprocProcess the number receiving for receiving node
According to required time, TACKFor transmitting the time that a frame ACK frame needs, TDATAFor transmitting the time of all data.
Preferably, in the oriented communication means of described assist type, distributed inter-frame space TDIFSFor 34 μ s, between the shortest interframe
Every TSIFSFor 16 μ s, antenna conversion time TswitchFor 10ns, data processing time TprocFor 10ns, other times are according to being passed
The size of data is adjusted.
The present invention relates to towards the oriented communication means of assist type of self-organizing Terahertz network and its network architecture, described
The network architecture is self-organizing network framework, and the communication means of design has used low frequency omni-directional antenna and oriented Terahertz sky simultaneously
Line, completes the purpose of high speed data transfer, is mainly communicated by following steps：
Step 1.1：Ordinary node by obtaining the positional information of itself with anchor node directional communication；
Step 1.2：When sending node needs to send data, keep out of the way a distributed inter-frame space first, then begin to
Intercept adopted low frequency channel, if channel is occupied, kept out of the way until channel idle；
Step 1.3：Sending node first passes through the request to send frame (Request that low frequency omni-directional antenna sends an extension
To Send of Node Information, RTS-NI) give receiving node, include the positional information of sending node in this frame
And its direction of oriented Terahertz antenna, specific frame format is as shown in Figure 2.After receiving node receives RTS-NI frame, return one
The Clear to Send frame (Clear to Send of Node Information, CTS-NI) of individual extension gives sending node, CTS-NI
The positional information of receiving node and its direction of oriented Terahertz antenna is comprised in frame；
Step 1.4：Two nodes obtain direction and the beam angle of antenna after calculating, and wherein reach receiving node
Watt level must is fulfilled for below equation：
Wherein d is the distance between two nodes, and c is the light velocity,For noise power, SNRminFor minimum signal-noise ratio threshold
Value, StF () is the power spectral density of sending node, kabsF () is the molecule absorption factor.Define the fixing field angle of aerial array
Spend for ΩA, the directivity of oriented antenna is represented by：
Wherein θhAnd φhIt is respectively horizontal angle and the elevation angle of half-power beam width.
According to the process of above step, the time delay that can obtain whole process is：
Ttotal1=TDIFS+TSIFS+2TNI+TBF+2Tprop⑸
Wherein back off time TBFCan be obtained by the following formula：
TBF=[Rnd () × (2CW-1)]·2τ ⑹
Wherein Rnd () is the random number between 0 to 1, and CW is smaller value between number of retransmissions and 10, and square brackets represent and take
Whole.
Step 1.5：Sending node waits an antenna conversion time, subsequently passes through oriented Terahertz antenna and sends a frame survey
Examination frame (Test to Send, TTS) give receiving node, if receiving node do not return acknowledgement frame (Acknowledgement,
ACK) or sending node is not properly received the ACK frame of return and then represents connection failure, and repeat step 1.1, until reaching
Set up the upper limit connecting number of times；Conversely, then sending node begin through oriented Terahertz antenna start send data.
Step 1.6：After sending ED, receiving node again returns to an ACK, if sending node is properly received,
Whole transmission process terminates, if receiving node does not return ACK or sending node does not receive ACK, carries out data weight
Send out, reach the standard grade until reaching number of retransmissions, Fig. 3 gives the main process of two steps.
According to above step, can obtain its main time delay is：
Ttotal2=Ttest+TDATA⑺
Wherein TtestFor sending the time of test bag, it is represented by：
Ttest=Tswitch+TTTS+TACK+Tproc+2Tprop⑻
Wherein TDATAThe time needing for transmission data, it is represented by：
Realize the network architecture of the inventive method, belong to the self-organizing Terahertz network architecture, in this network architecture, commonly
Node is communicated by Ad hoc mode, and ordinary node has low frequency omni-directional antenna and other nodes are controlled the friendship of information
Change, the oriented Terahertz antenna using high band carries out data transmission.Anchor node passes through GPS module or the side of manually setting being equipped with
Formula obtains geographical position, and assists ordinary node to be positioned by directional communication technology.
Oriented antenna can be by adjusting the beam angle of itself come the size of adjust gain it is also possible to adjust the ripple of oneself
Shu Fangxiang thus carrying out the pairing between node, to reach the purpose of communication.
Before sending node carries out data is activation, need first to intercept low frequency channel whether occupied, if occupied needs
Enable a back off time, this back off time is preferably adjusted according to binary system back off algorithm, but is not limited to binary system and moves back
Keep away algorithm.
Send request if there are two and above sending node to same receiving node, then this multiple sending node will
Obtain transmission route by way of competition, the node of competition failure resends waiting after a random-backoff time.
The present invention is directed to the problem that in self-organizing Terahertz network, Terahertz communication distance is short, path loss is big, introduces
High directivity, the oriented Terahertz antenna of high-gain.And be likely encountered for the Terahertz network node employing oriented antenna
Cannot be carried out the problem of coupling that communicates, introduce low-frequency range omnidirectional antenna and transmit for node locating and control information, help section
The beam angle of point adjustment antenna and direction.Meanwhile, devise one kind reasonably oriented communication means, the method mainly divides two
Stage：In the stage 1, node exchanges corresponding positional information and aerial information by the omnidirectional antenna of low-frequency range, through calculating
Obtain beam angle and the beam direction of oriented Terahertz antenna afterwards, thus completing the communication matching problem of two nodes；In rank
In section 2, sending node sends a test frame TTS to receiving node first, and receiving node proceeds by after returning acknowledgement frame ACK
The transmission of data, sending node has sent data post-reception node and can return an acknowledgement frame ACK and shown that data receiver finishes.Logical
Cross the method for the present invention, on the one hand solve that Terahertz transmission range is short, orientation node communication coupling hardly possible, poor expandability etc. are asked
Topic, on the other hand significantly improves Terahertz channel utilization and network throughput.
Claims (4)
1. a kind of oriented communication means of assist type of self-organizing Terahertz (THz) network, has steps of：
Step 1.1：Ordinary node by obtaining the positional information of itself with anchor node directional communication；
Step 1.2：When sending node needs to send data, keep out of the way a distributed inter-frame space first, then begin to intercept
The low frequency channel being adopted, if channel is occupied, is kept out of the way until channel idle；
Step 1.3：Sending node first passes through request to send frame RTS-NI that low frequency omni-directional antenna sends an extension
(Request To Send of Node Information) gives receiving node, includes the position letter of sending node in this frame
Breath and its direction of oriented Terahertz antenna.After receiving node receives RTS-NI frame, return the Clear to Send frame of an extension
CTS-NI (Clear To Send of Node Information) gives sending node, comprises receiving node in CTS-NI frame
Positional information and its direction of oriented Terahertz antenna；
Step 1.4：Two nodes obtain direction and the beam angle of antenna after calculating, and wherein reach the power of receiving node
Size must is fulfilled for below equation：
Wherein d is the distance between two nodes, and c is the light velocity,For noise power, SNRminFor minimum signal-noise ratio threshold value, St
F () is the power spectral density of sending node, kabsF () is the molecule absorption factor.Defining the fixing beam angle of aerial array is
ΩA, the directivity of oriented antenna is represented by：
Wherein θhAnd φhIt is respectively horizontal angle and the elevation angle of half-power beam width.
According to the process of above step, the time delay T of all stage 1 can be obtainedtotal1For：
Ttotal1=TDIFS+TSIFS+TRTS-NI+TCTS-NI+TBF+2Tprop⑸
Wherein TDIFSAnd TSIFSIt is respectively distributed inter-frame space and short interFrameGap time, TRTS-NIAnd TCTS-NIIt is to pass respectively
The time that defeated frame RTS-NI and CTS-NI needs, TpropFor the propagation delay between sending node and receiving node, TBFFor one
Secondary back off time, can be obtained by the following formula：
TBF=[Rnd () × (2CW-1)]·2τ ⑹
Wherein Rnd () is the random number between 0 to 1, and CW is smaller value between number of retransmissions and 10, and square brackets represent and take
Whole, τ is minimum time interval.
Step 1.5：Sending node waits an antenna conversion time, subsequently passes through oriented Terahertz antenna and sends a frame test frame
(Test to Send, TTS) give receiving node, if receiving node do not return acknowledgement frame (Acknowledgment, ACK) or
The ACK frame that person's sending node is not properly received return then represents connection failure, and repeat step 1.1, until reaching the company of foundation
Connect the upper limit of number of times；Conversely, then sending node begin through oriented Terahertz antenna start send data.
Step 1.6：After sending ED, receiving node again returns to an ACK, if sending node is properly received, whole
Transmission process terminates, if receiving node does not return ACK or sending node does not receive ACK, carries out data re-transmitting, directly
Reach the number of retransmissions upper limit.
According to above step, the time delay T in stage 2 can be obtainedtotal2For：
Ttotal2=Ttest+TDATA⑺
Wherein TtestFor sending the time of test bag, it is represented by：
Ttest=Tswitch+TTTS+TACK+Tproc+2Tprop⑻
Wherein TswitchIt is the time that antenna is converted to from low frequency omni-directional antenna oriented Terahertz antenna, TTTSFor sending TTS frame
Time, TACKFor sending the time of ACK acknowledgement frame, TprocIt is the process time to Frame, wherein TDATANeed for transmission data
The time wanted, it is represented by：
Wherein LdataFor total data volume needing to send, LoneFor the restriction size of a packet, rTHzFor Terahertz frequency range number
According to transfer rate,Expression rounds up.
2. a kind of self-organizing Terahertz network according to claim 1 the oriented communication means of assist type it is characterised in that：
Ordinary node is communicated with anchor node at set intervals by low frequency omni-directional antenna, to update the positional information of itself, protects
The accuracy in the front position of upper once communication for the card；The frequency that the length of described distributed inter-frame space adopts according to omnidirectional antenna
Determine with information rate；Before node sends data, whether occupied, if occupied, need if needing first to intercept low frequency channel
Enable a back off time；Ordinary node passes through low frequency omni-directional aerial exchanging node location information and control information, by terahertz
Hereby the oriented antenna of frequency range carries out data transmission；Request to send frame RTS-NI and Clear to Send frame CTS-NI, include frame control,
The letter of persistent period, source address and destination address information, sequence control, node location information, aerial information and Frame Check Sequence
Breath；Described node adopts identical oriented Terahertz antenna.
3. a kind of self-organizing Terahertz network according to claim 2 the oriented communication means of assist type it is characterised in that：
Send request if there are two and above sending node to same receiving node, then this multiple sending node is by competing simultaneously
The mode striven obtains transmission route, and random wait is resend after a back off time by the node of competition failure.
4. realize a kind of network rack of the oriented communication means of assist type of self-organizing Terahertz network as claimed in claim 1
Structure it is characterised in that:Possess two kinds of different nodes, a kind of is ordinary node, is randomly dispersed in certain region, node can
To move, and form the network of self-organizing by mutual communication；A kind of is anchor node, and univesral distribution is in certain area
In domain, anchor node obtains own location information by being equipped with GPS module or the mode that manually sets, simultaneously by entering with ordinary node
Row directional communication assists it to be positioned；
Described ordinary node and anchor node are equipped with low frequency omni-directional antenna, and the frequency of described low frequency includes 2.4GHz and 5GHz；General
Logical node is equipped with the information transfer that the oriented antenna of Terahertz frequency range is used between node, the Terahertz frequency range orientation of ordinary node
Antenna can adjust beam angle and the beam direction of antenna according to the geographical position of sending node and receiving node, and anchor node is not
It is equipped with the beam antenna of Terahertz frequency range, the frequency of described Terahertz frequency range includes 0.1-10THz；
In described network, in the case of ensureing that anchor node can cover all ordinary nodes, it is used in two dimensional surface environment
The anchor node quantity of auxiliary positioning can not be less than 3, and in three-dimensional environment, anchor node number can not be less than 4.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108183344A (en) * | 2017-12-05 | 2018-06-19 | 西安华讯天基通信技术有限公司 | A kind of directional aerial and its method for sending and receiving data |
| CN108183738A (en) * | 2017-12-28 | 2018-06-19 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time-division mixing multi-address method based on communication satellite |
| CN108419266A (en) * | 2017-02-10 | 2018-08-17 | 华为技术有限公司 | A kind of channel sense method and transmitting end equipment |
| CN110650525A (en) * | 2019-08-12 | 2020-01-03 | 浙江工业大学 | Multi-beam distributed power MAC protocol communication method |
| CN113765584A (en) * | 2021-09-30 | 2021-12-07 | 中国人民解放军国防科技大学 | Terahertz networking medium access control method based on two-way handshake |
| CN113890628A (en) * | 2021-09-30 | 2022-01-04 | 中国人民解放军国防科技大学 | Terahertz networking medium access control method based on one-way handshake |
| CN117040645A (en) * | 2023-10-09 | 2023-11-10 | 成都本原星通科技有限公司 | Terminal receiving optimization method for terahertz communication of low-orbit satellite |
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| CN108419266A (en) * | 2017-02-10 | 2018-08-17 | 华为技术有限公司 | A kind of channel sense method and transmitting end equipment |
| CN108419266B (en) * | 2017-02-10 | 2020-12-25 | 华为技术有限公司 | Channel interception method and transmitting terminal equipment |
| CN108183344A (en) * | 2017-12-05 | 2018-06-19 | 西安华讯天基通信技术有限公司 | A kind of directional aerial and its method for sending and receiving data |
| CN108183344B (en) * | 2017-12-05 | 2024-02-02 | 西安华讯天基通信技术有限公司 | Directional antenna and method for transmitting and receiving data by directional antenna |
| CN108183738A (en) * | 2017-12-28 | 2018-06-19 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time-division mixing multi-address method based on communication satellite |
| CN108183738B (en) * | 2017-12-28 | 2020-05-08 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time division hybrid multiple access method based on active antenna array |
| CN110650525A (en) * | 2019-08-12 | 2020-01-03 | 浙江工业大学 | Multi-beam distributed power MAC protocol communication method |
| CN113765584A (en) * | 2021-09-30 | 2021-12-07 | 中国人民解放军国防科技大学 | Terahertz networking medium access control method based on two-way handshake |
| CN113890628A (en) * | 2021-09-30 | 2022-01-04 | 中国人民解放军国防科技大学 | Terahertz networking medium access control method based on one-way handshake |
| CN113765584B (en) * | 2021-09-30 | 2022-05-06 | 中国人民解放军国防科技大学 | Terahertz networking medium access control method based on two-way handshake |
| CN117040645A (en) * | 2023-10-09 | 2023-11-10 | 成都本原星通科技有限公司 | Terminal receiving optimization method for terahertz communication of low-orbit satellite |
| CN117040645B (en) * | 2023-10-09 | 2023-12-15 | 成都本原星通科技有限公司 | Terminal receiving optimization method for terahertz communication of low-orbit satellite |
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