CN108712201A - A kind of LEO upstream Asynchronous suitable for GEO/LEO networks cooperates with multiple access method - Google Patents
A kind of LEO upstream Asynchronous suitable for GEO/LEO networks cooperates with multiple access method Download PDFInfo
- Publication number
- CN108712201A CN108712201A CN201810399346.1A CN201810399346A CN108712201A CN 108712201 A CN108712201 A CN 108712201A CN 201810399346 A CN201810399346 A CN 201810399346A CN 108712201 A CN108712201 A CN 108712201A
- Authority
- CN
- China
- Prior art keywords
- geo
- nodes
- leo
- message
- message package
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011144 upstream manufacturing Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000012163 sequencing technique Methods 0.000 claims description 4
- 230000008685 targeting Effects 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 230000011664 signaling Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 11
- 238000011161 development Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0061—Error detection codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03611—Iterative algorithms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of LEO upstream Asynchronous suitable for GEO/LEO networks to cooperate with multiple access method, and collision problem of the LEO upstream messages in asynchronous random access is solved by method for eliminating serial interference at GEO receiving nodes.In the method for the present invention, each LEO nodes encodings modulated message packet is sent, and the message package that each LEO nodes are sent at least is received by two GEO nodes；The message package received is returned to the gateway station on ground by each GEO nodes；The demodulating equipment of gateway station is that each GEO nodes are correspondingly arranged there are one detection window is slided, and carries out message detection and coded demodulation.In demodulation, cross-node co-interfere elimination is carried out using isomery time delay and the message package that do not collide, restores the message package of collision.The present invention is not necessarily to system synchronization, reduces the power introduced for system synchronization and signaling overheads, and reduce the power consumption of terminal.
Description
Technical field
The invention belongs to wireless communication technology fields, and in particular to a kind of LEO upstream Asynchronous suitable for GEO/LEO networks
Cooperate with multiple access method.
Background technology
The space-sky information network infrastructure important as China, receives more and more attention.By the end of in August, 2015
Chinese satellite in orbit number had been more than Russia, and had been only second to the U.S. and possesses number of satellite more than second as the world up to 142 on 31st
Country.To push forward national Civilian Space infrastructure healthy and rapid development comprehensively, promote space resources scale, business,
Commercial application, in publication in 2015, " national Civilian Space infrastructure Long-and Medium-term Development planned (2015-2025 in China
Year) ".By industry and country to the attention of space-sky information network correlative study as can be seen that the development of space-sky information network will
It is China's economy and the indispensable core component of national defense construction.Due to geo-synchronous orbit satellite
(Geosynchronous Earth Orbit, GEO) and low orbit satellite (Low Earth Orbit, LEO) in propagation delay time, cover
Lid range, transmission loss etc. have the characteristic having complementary advantages, in order to meet real-time/non-real time business in satellite network, low
Demand for services coexists in speed/high speed business, and GEO/LEO networks are the important components of the following space-sky information network.
In GEO/LEO networks, it is generally basede on software defined network (Software Defined Network, SDN) think of
Think, using the natural differences of GEO and LEO in coverage area, GEO/LEO networks are divided into GEO control planes and LEO data
Collecting and distributing to bottom LEO node messages is completed in face in GEO control planes.The order of magnitude due to the following LEO quantity at thousand
(such as OneWeb companies form constellations using 720 LEO satellites), thus the multiple access technique of LEO be designed to it is important
Problem.For the following GEO/LEO networks, radio access technology is more more advantageous than other access modes, it is promoting money
Source utilization rate reduces access delay etc. and is of great significance.However, existing accidental access method does not consider how
Distribution and the multinode resource for utilizing empty day network, can cause when the LEO nodes of the big order of magnitude access a GEO node at the same time
The collision of a large amount of message；In addition, existing random access protocol is mostly based on slot synchronization, for GEO/LEO networks its
Time delay is isomery time-varying, and Integral synchronous is difficult, and synchronizes and need to bring the resource overheads such as additional signaling and power.
Therefore, the research of the asynchronous accidental access methods of LEO under isomery time delay is of great significance to the development of empty day network.
In GEO/LEO networks, GEO-LEO links there are obvious isomery time delay (heterogeneous delay),
It is that the same GEO nodes caused by the otherness on position are saved from different LEO due to GEO nodes in network and LEO nodes
Propagation delay difference between point, is mainly reflected in the following aspects：Different LEO sending nodes are to same GEO receiving nodes
Time delay is different；The time delay of the same sending points LEO to different GEO receiving nodes is different and same LEO sending nodes are to same GEO
The time delay of receiving node changes over time (LEO satellite is with respect to GEO satellite high-speed motion).Since this time delay of isomery time delay is more
Sample and time variation, realized in GEO/LEO networks time synchronization can there is a problem of synchronization overhead it is big with it is synchronous frequent so that
Tradition is difficult to be applied based on slot synchronization radio access technology.For example pure ALOHA agreements of typical asynchronous radio access technology
[1], handling capacity only has 0.18packet/slot, the Asynchronous Flipped Diversity ALOHA of better performances
(AFDA)[2]With Asynchronous Contention Resolution Diversity ALOHA (ACRDA)s [3]Technology can
To obtain higher handling capacity, but they are both for the asynchronous access of single receiving point.With the development of cooperation technology between star, star
Between link transmission ability constantly enhance, between star cooperation provide possibility.In ground network, has researcher and propose to be based on
Multi-base station cooperative random access (Cooperative Slotted ALOHA) Ji Shu [ of CDMA slotted ALOHA;4], utilize different transmissions
The time delay of node to same receiving node is different, by multi-node collaboration interference cancellation techniques maximum system throughput, completes
Multiple access accesses.But the technology is only applicable to the scene of CDMA slotted ALOHA, in the GEO/LEO networks with isomery time delay, can exist
Synchronization overhead is big with frequently synchronous problem.Therefore, how using GEO/LEO network node quantity, there are between star between more, node
The advantage that link can cooperate designs a kind of LEO asynchronous cooperation multiple access techniques suitable for GEO/LEO networks, simultaneously
The handling capacity and packet loss of guarantee system are the key that push empty day communication network development.
Bibliography is as follows：
[1]Roberts,Lawrence G."ALOHA packet system with and without slots and
capture."Acm Sigcomm Computer Communication Review 5.2(1975):28-42.
[2]Zheng,Lei,and L.Cai."AFDA:Asynchronous Flipped Diversity ALOHA for
Emerging Wireless Networks With Long and Heterogeneous Delay."IEEE
Transactions on Emerging Topics in Computing 3.1(2015):64-73.
[3]De Gaudenzi,R,et al."Asynchronous Contention Resolution Diversity
ALOHA:Making CRDSA Truly Asynchronous."Wireless Communications IEEE
Transactions on 13.11(2014):6193-6206.
[4]et al."Cooperative Slotted Aloha for Multi-Base
Station Systems."IEEE Transactions on Communications 63.4(2015):1443-1456.
Invention content
The object of the present invention is to provide a kind of LEO asynchronous cooperation multiple access techniques suitable for GEO/LEO networks, utilize
Cooperate ability between the delay inequality and GEO of GEO-LEO links, passes through method for eliminating serial interference at GEO receiving nodes
Solve collision problem of the LEO upstream messages in asynchronous random access.
A kind of LEO upstream Asynchronous suitable for GEO/LEO networks provided by the invention cooperates with multiple access method, each LEO
Nodes encoding modulated message packet is sent；The message package that each LEO nodes are sent at least is received by two GEO nodes；Each GEO
The message package received is returned to the gateway station on ground by node；The demodulating equipment of gateway station is that each GEO nodes are correspondingly arranged
There are one detection window is slided, message detection and coded demodulation are carried out.
The demodulating equipment of the gateway station, the message package sent to each GEO nodes are detected and the mistake of coded demodulation
Journey includes：
Step 1, the message package not collided and decoding are detected at GEO node is；
Step 2, the decoded information of step 1 is being sent locally at cooperation GEO nodes j, j ≠ i；At GEO nodes j,
The channel information for arriving gateway station again to GEO nodes j according to LEO nodes recompiles modulation to the decoded information, generates message package
Pkreg；The mode for recompiling modulation is identical as LEO nodes；
Step 3, at GEO nodes j, message package PkregIt is collided with other message packages, by PkregWith GEO nodes j
Sliding detection window in all information carry out related operation, generate a peak value, the position where peak is exactly message package
PkregIn the center of GEO receiving nodes j；
Step 4, at GEO nodes j, according to message package PkregWith determining position, by PkregIntroduced interference is eliminated,
So that with message package PkregThe message package to collide becomes the message package not collided；Then the message to not colliding
Packet is decoded；
1~step 4 of previous step is repeated, interference is iterated and eliminates, the maximum iteration until reaching setting.
Compared with prior art, the present invention having following clear superiority：
(1) present invention utilizes there is more apparent isomery time delay in GEO/LEO networks, it being not necessarily to system synchronization, being reduced
The power and signaling overheads introduced for system synchronization；
(2) thought of the invention by space diversity, each message package need to only be sent one time, can be by multiple receiving nodes
It receives, reduces the power consumption of terminal；
(3) in terms of receiver, the present invention cooperates with iterative interference cancellation technology using cross-node, in conjunction with sliding coherent detection
Technology can effectively restore the message package of collision.
Description of the drawings
Fig. 1 is the GEO layer satellite distribution schematic diagrames that the embodiment of the present invention is provided；
Fig. 2 is GEO/LEO network architecture schematic diagrams of the present invention；
Fig. 3 is the schematic diagram that cross-node co-interfere elimination is carried out in the method for the present invention.
Specific implementation mode
The present invention is understood and implemented for the ease of those of ordinary skill in the art, and the present invention is made into one below in conjunction with the accompanying drawings
The detailed description of step.
The present invention is directed to the multiple access technique problem that LEO is faced when accessing GEO in GEO/LEO networks, in satellite
In the case of the communication resource and power limited, proposes a kind of novel multiple access method based on GEO-LEO chain-circuit time delay differences, be
LEO upstream message anticollision problems propose a kind of effective solution.
In the GEO/LEO network architectures of the embodiment of the present invention, it is assumed that LEO layers have M LEO satellite, they are defended by 6 GEO
Star covers, as shown in Figure 1.Since 3 GEO can be covering the whole world, the message that any one LEO node is sent to upper layer is all
It can be received by least 2 GEO.
Since satellite distribution orbit altitude is different so that the message that same LEO nodes are sent reach different GEO nodes when
Prolong difference；The time delay that the message that different LEO nodes are sent reaches same GEO nodes is also different.This system is asynchronous system, is not required to
Want time synchronization, LEO nodes that can send message at any time.In this way, identical message, the collision situation at different GEO nodes
Also just different.After GEO satellite receives message, the gateway station by message back to ground carries out cooperation detection processing.In this hair
In bright, it is assumed that the channel of every GEO satellite to gateway station is independent from each other and not will produce error code in the process.
Present invention employs the thought of space diversity, each LEO only needs to send a message, it can be by least 2
GEO satellite is received, and need not send the duplication message of a plurality of message, it reduce the power overheads of LEO.Every message exists
[t,t+Δt]It is received in time range, wherein t is minimum propagation delay of the LEO nodes to GEO nodes, and Δ t is maximum propagation
Delay inequality.Assuming that the Poisson distribution that parameter is λ is obeyed in system load, every message package is isometric, duration τ, due to data
Packet length τ ≈ 1ms assume that Δ t > τ are reasonable in general in GEO/LEO networks.Fig. 2 is the system of GEO/LEO networks
Configuration diagram, the message that LEO is sent at least are received by 2 GEO, gateway station of each GEO passback message to ground.
The LEO upstream Asynchronous that the present invention is suitable for GEO/LEO networks cooperates with multiple access method, modulated terminal in LEO nodes,
Demodulating end demodulates the signal that GEO is received in gateway station, gateway station.
In the modulated terminal of LEO, each message package is encoded and is adjusted with code rate r and modulation index M at LEO nodes
System, does not then need system synchronization, transmits it out, it can be received by GEO nodes.It will adhere in the front end of message package
One section of targeting sequencing is used for signal capture and channel estimation.
The demodulating equipment of the present invention is sliding detection window there are one each GEO receiving nodes are correspondingly arranged at gateway station
Mouthful, for being decoded to the message received.Assuming that when the initial position of front slide detection window is Ws, final position We,
When receiving signal in window, which is filtered, is sampled, and local is then stored in.Since there are isomeries for GEO/LEO networks
Time delay can guarantee that receiver efficiently operates in this way so the size W of sliding window is greater than Δ t.Message in current window
After being disposed, window can move right Δ W, and then newly-generated detection window can handle [Ws+ΔW,We+ΔW]In range
The message received, the sample stored in Δ W windows before will be deleted.Δ W is the window sliding step-length of setting.
When GEO receiving nodes detect more than two message, there can be message package collision, when the present invention utilizes isomery
Prolong, cross-node co-interfere elimination is carried out using the message package that do not collide, restores the message package of collision.As shown in figure 3, passing through
For the sliding detection window of 2 GEO receiving nodes, come illustrate gateway station demodulating equipment message detection flow, say below
Bright each step.
Step 1, it does not collide message package to detect, the message that the demodulating equipment parallel detection GEO nodes at gateway station receive,
Detection process can utilize the otherness for receiving signal power, be detected since the strongest signal of power.Once before message
It leads sequence to be detected, demodulator can be estimated channel according to targeting sequencing, then be decoded subsequent message.Solution
CRC (cyclic redundancy check) verifications can be carried out after the completion of code will be considered that successfully decoded, that is, this disappears if verification passes through
Breath does not collide with other message.The 1st message package in Fig. 3 in the 1st GEO receiving node is exactly one and does not occur
The message package of collision.
Step 2, collaboration and reconstruct, once the sliding detection window at some GEO receiving node i is detected and is not touched
The message package hit, then the information of the message package can be detected in the sliding for being sent locally to other cooperation GEO nodes j (j ≠ i)
Window.Then the window at cooperation GEO nodes j, the channel information of gateway station is arrived according to LEO nodes again to GEO nodes j,
Modulation is recompiled to the information, regenerates message package, the message package regenerated is denoted as Pkreg.In figure 3, GEO is received
Node 1 can be sent to the information of message package 1 GEO receiving nodes 2, and GEO receiving nodes 2 can be according to its corresponding channel information weight
Coded modulation newly is carried out to message package 1.
Step 3, interference message location determination, in Fig. 3, the message package 1 at GEO receiving nodes 2 occurs with other message packages
Collision needs the interference that introduces it into eliminate.Message package 1 is regenerated at GEO receiving nodes 2 at present, still
Since the method for the present invention does not have time synchronization, the also just not concept of time slot, therefore tool of the message package 1 at GEO receiving nodes 2
Body position is not aware that.The method of the present invention determines that the position of interference packet, i.e. message package 1 connect in GEO using sliding the relevant technologies
Receive the position at node 2.Due to the message package Pk regeneratedregIdentical coding and tune are used with the message that LEO terminals are sent
Mode processed, therefore by PkregRelated operation is carried out with information all in detection window, will produce a peak value, this peak place
Position be exactly the interference packet in the center of this GEO receiving node.
Step 4, co-interfere is eliminated, and after the location determination of interference packet, the interference introduced can be eliminated, in this way
So that some message packages to collide originally become the message package not collided.In the 2nd GEO receiving node in Fig. 3
Message package 2, it originally only collide with message package 1.Once the interference that message package 1 introduces is eliminated, message package 2 can
To be successfully detected.
According to this process, interference constantly is iterated to step 1~step 4 and is eliminated, the maximum until reaching setting
IterationsIn this way, having restored the message package of collision using isomery time delay.Wherein, i, j are the number of GEO, and the present invention is real
It applies in example, i=1,2 ... 6；J=1,2 ... 6.
But after successive ignition, some message packages are still within collision status at all nodes, can not be by success
Detection, such as the message package 3 and message package 4 in Fig. 3.Due to the present invention is based on be asynchronous system, so may be between message
There are the collisions of sub-fraction.Therefore, forward error correction (Forward Error Correction, FEC) can be utilized to letter
It number is encoded, by the strong error correcting capability of the coding, the message to fraction collision occurs restores, to further carry
Rise the performance of the method for the present invention.
Claims (5)
1. a kind of LEO upstream Asynchronous suitable for GEO/LEO networks cooperates with multiple access method, which is characterized in that each LEO nodes
Coded modulation message package is sent；The message package that each LEO nodes are sent at least is received by two GEO nodes；Each GEO nodes
The message package received is returned to the gateway station on ground；The demodulating equipment of gateway station is that each GEO nodes are correspondingly arranged on one
A sliding detection window carries out message detection and coded demodulation；Wherein, GEO is geo-synchronous orbit satellite, and LEO is that low rail is defended
Star；
The demodulating equipment of gateway station is detected the message package that each GEO nodes are sent and the process of coded demodulation includes：
Step 1, the message package not collided and decoding are detected at GEO node is；
Step 2, the decoded information of step 1 is being sent locally at cooperation GEO nodes j, j ≠ i；At GEO nodes j, according to
LEO nodes arrive the channel information of gateway station to GEO nodes j again, recompile modulation to the decoded information, generate message package
Pkreg；The mode for recompiling modulation is identical as LEO nodes；
Step 3, at GEO nodes j, message package PkregIt is collided with other message packages, by PkregWith the cunning of GEO nodes j
All information carries out related operation in dynamic detection window, generates a peak value, the position where peak is exactly message package Pkreg
The center of GEO receiving nodes j；
Step 4, at GEO nodes j, according to message package PkregWith determining position, by PkregIntroduced interference is eliminated so that
With message package PkregThe message package to collide becomes the message package not collided；Then to the message package that does not collide into
Row decoding；
1~step 4 of previous step is repeated, interference is iterated and eliminates, the maximum iteration until reaching setting.
2. according to the method described in claim 1, it is characterized in that, the gateway station, demodulating equipment are each GEO nodes
It is correspondingly arranged there are one detection window is slided, for being decoded to the message received；
For a sliding detection window, if the initial position of the current window is Ws, final position We, when the window is inscribed
When receiving signal, signal is filtered and is sampled, is then stored in local；The size W that sliding window is arranged is greater than Δ t,
Δ t is maximum propagation delay inequality of the LEO nodes to GEO nodes；After Message Processing in current window, window moves right
Dynamic Δ W, newly-generated detection window handle [Ws+ΔW,We+ΔW]The message received in range, before Δ W windows memory
The sample of storage will be deleted.
3. method according to claim 1 or 2, which is characterized in that the gateway station, demodulating equipment parallel detection
The message that GEO nodes receive, when detection, are detected since the strongest signal of power；When the targeting sequencing of message is detected,
Demodulating equipment will be estimated channel according to targeting sequencing, is then decoded to subsequent message, be carried out after the completion of decoding
CRC check, if verification passes through, successfully decoded, at this point, the message package does not collide with other message packages；Wherein,
CRC represents cyclic redundancy check.
4. method according to claim 1 or 2, which is characterized in that the method further includes with forward error correction to letter
It number is encoded, by the strong error correcting capability of the coding, the message to collide to a part restores.
5. method according to claim 1 or 2, which is characterized in that the LEO nodes only need to send out to each message package
It send one time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810399346.1A CN108712201B (en) | 2018-04-28 | 2018-04-28 | A kind of LEO upstream Asynchronous collaboration multiple access method suitable for GEO/LEO network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810399346.1A CN108712201B (en) | 2018-04-28 | 2018-04-28 | A kind of LEO upstream Asynchronous collaboration multiple access method suitable for GEO/LEO network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108712201A true CN108712201A (en) | 2018-10-26 |
| CN108712201B CN108712201B (en) | 2019-09-06 |
Family
ID=63867680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810399346.1A Active CN108712201B (en) | 2018-04-28 | 2018-04-28 | A kind of LEO upstream Asynchronous collaboration multiple access method suitable for GEO/LEO network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108712201B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112020084A (en) * | 2020-07-21 | 2020-12-01 | 北京邮电大学 | Two-step random access channel design and signal detection method in satellite scene |
| CN112671452A (en) * | 2020-12-17 | 2021-04-16 | 西安电子科技大学 | Heterogeneous satellite network management method, system, medium, equipment, terminal and application |
| CN113098606A (en) * | 2018-12-28 | 2021-07-09 | 长沙天仪空间科技研究院有限公司 | Optical communication method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929232A (en) * | 2014-04-23 | 2014-07-16 | 西安电子科技大学 | Broadband mobile communication method and system based on multi-beam GEO satellite |
-
2018
- 2018-04-28 CN CN201810399346.1A patent/CN108712201B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929232A (en) * | 2014-04-23 | 2014-07-16 | 西安电子科技大学 | Broadband mobile communication method and system based on multi-beam GEO satellite |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113098606A (en) * | 2018-12-28 | 2021-07-09 | 长沙天仪空间科技研究院有限公司 | Optical communication method |
| CN113098606B (en) * | 2018-12-28 | 2022-03-01 | 长沙天仪空间科技研究院有限公司 | Optical communication method |
| CN112020084A (en) * | 2020-07-21 | 2020-12-01 | 北京邮电大学 | Two-step random access channel design and signal detection method in satellite scene |
| CN112671452A (en) * | 2020-12-17 | 2021-04-16 | 西安电子科技大学 | Heterogeneous satellite network management method, system, medium, equipment, terminal and application |
| CN112671452B (en) * | 2020-12-17 | 2023-03-14 | 西安电子科技大学 | Heterogeneous satellite network management method, system, medium, equipment, terminal and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108712201B (en) | 2019-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108712201B (en) | A kind of LEO upstream Asynchronous collaboration multiple access method suitable for GEO/LEO network | |
| US6377561B1 (en) | Data communication satellite system and method of carrying multi-media traffic | |
| Casini et al. | Contention resolution diversity slotted ALOHA (CRDSA): An enhanced random access schemefor satellite access packet networks | |
| US4375097A (en) | Transparent intelligent network for data and voice | |
| US20060171418A1 (en) | Method of packet mode digital communication over a transmission channel shared by a plurality of users | |
| US4334306A (en) | Transparent intelligent network for data and voice | |
| CN104484295A (en) | Receiver sliding window-based data transmission method in parallel computer system | |
| US4316283A (en) | Transparent intelligent network for data and voice | |
| Jung et al. | End-to-end reliability of satellite communication network systems | |
| Zhang et al. | Optimization strategy to solve transmission interruption caused by satellite-ground link switching | |
| CN117082639A (en) | Optimal cooperative asynchronous random access method, system, storage medium and device | |
| Wang et al. | Massive machine type communications: multiple access schemes | |
| Liu et al. | Multi-satellite cooperative beamforming aloha for leo satellite iot networks | |
| Chen et al. | Design and analysis of multiple token ring networks | |
| Muhammad et al. | Network-coding-based gateway handover scheme for terabit satellite networks | |
| Wong et al. | Performance analysis of multi-channel pure collective Aloha MAC protocol for satellite uplink access | |
| Xu et al. | A satellite network data transmission algorithm based on adaptive LT code | |
| Borgonovo et al. | A new technique for satellite broadcast channel communication | |
| Fines et al. | Turbo-code division multiple access: capacity enhancement of mobile satellite systems using narrowband multiuser detection | |
| Jinyuan et al. | UAV‐Relaying Cooperation for Internet of Everything with CRT‐Based NOMA | |
| KR102614178B1 (en) | Method and apparatus for receiving wireless signal in wireless communication system | |
| Zhou et al. | Performance analysis of network coded cooperative D2D communications | |
| Tsatsanis et al. | Network assisted diversity for random access wireless data networks | |
| CN114124193A (en) | High-performance data transmission baseband odd-even combination real-time processing system and method thereof | |
| Arnon et al. | Enhanced ATM for satellite laser communication networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |