CN1230056A - Method and system for providing satellite multimedia service - Google Patents
Method and system for providing satellite multimedia service Download PDFInfo
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- CN1230056A CN1230056A CN98126513A CN98126513A CN1230056A CN 1230056 A CN1230056 A CN 1230056A CN 98126513 A CN98126513 A CN 98126513A CN 98126513 A CN98126513 A CN 98126513A CN 1230056 A CN1230056 A CN 1230056A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Radio Relay Systems (AREA)
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Abstract
A satellite multimedia service system is capable of performing satellite internet service, multi-points data distribution service, video and audio transmitting service. The system comprises a satellite, a terminal resource providing device, an internet resource providing device, a satellite multimedia inter-network connection device, a satellite antenna and a receiver.
Description
The present invention relates to a kind of method and system that multimedia service is provided; More specifically relating to a kind ofly can provide the satellite multimedia service, and for example Internet, multiple spot data distribute, the method and system of multipoint video/audio distribution.
Use multimedia service can produce, compile, transmit and handle various types of information such as comprising text, data, audio frequency, image, photo, animation and video in interior roundup content.In the multimedia industry, no matter what the type of information is in these contents, all to carry out digitlization then interactively offer the user.
Communication network is considered to be in and improves multimedia service and expand one of most important factor in aspect, multimedia market.Communication network as multimedia routine, the following type is arranged: integrated digital service network (ISDN), optical fiber are linked indoor (FTTH) net, optical fiber is linked control desk (FTTC) net, non-equilibrium digital subscriber line (ADSL), high bit rate DSL (HDSL) and adopted the hybrid fiber/ coax, HFC (HFC) of copper cash and/or optical fiber, the cable TV local area network (LAN) (CATVLAN) of use coaxial cable, and are used for the wireless local loop (WLL) of multichannel multiple spot distribution service (MMDS), local MDS (LMDS) and local multi-point service (LMCS).Conventional network is because facilities such as copper cash, optical fiber and/or coaxial cable former thereby be restricted aspect coverage scope and the service synchronization, or owing to the unsteadiness of network has caused the low problem of service reliability.
On the other hand, use satellite, utilize its wide service range, favorable service stability and service synchronism to come the extended multimedia service market as transmission medium.Can provide a large amount of communication services via satellite, such as television reception service (TVRO), satellite news gathering (SNG) service, very low pore size terminal (VSAT) service, T1/E1 carrier wave small aperture terminal (TSAT) service, satellite mobile data service (SMDS), digital broadcast service (DBS) and the service of satellite Internet.
But, conventional satellite communications services have low, the unidirectional transmission of transfer rate, because the facility costliness and availability is low, owing to window data bag small scale causes defectives such as link performance is low.Therefore, people wish to set up have high transmission speed, can interactively transmit, the facility expense is low and the sweeping satellite communication of window data bag.
Therefore, a main purpose of the present invention provide a kind of can be at broad range inter-sync, the stable and method and system that carries out multimedia service consistently.
According to an aspect of the present invention, provide a kind of satellite Internet service method of carrying out, comprised the steps:
Connection request to a user is confirmed;
Set up user's connection and give this user an IP address assignment;
Receive an information request there from the user;
If this requested information is acted on behalf of in (proxy) at a satellite, should requested information send a satellite multimedia gateway to;
If requested information in a satellite agency, does not just receive this requested information and sends this information to the satellite multimedia gateway from the Internet information provider unit;
In the satellite multimedia gateway, should requested information change, to send to the user via satellite; With
Receiving collect mail really breath and cancellation of user connects.
According to a further aspect in the invention, provide a satellite multimedia service system, it can carry out the service of satellite Internet, multiple spot data distribution service and video/audio and send service, and this system comprises:
Satellite;
The terminal resource generator is used for the service request of receiving from a plurality of information provider unit/content providing devices is delivered to industrial siding;
Internet resource generator is used to check whether the user eligible, and if service request be satellite Internet service, just select one of following operation: i.e. retrieval wherein the information that is requested or from Internet information provider unit there solicited message;
The satellite multimedia gateway, be used for receiving requested information from one of Internet resource generator, multiple spot information provider unit and video and audio frequency generator according to service request, and the information translation that is received become satellite-signal, this signal has the required predetermined format of satellite communication;
Satellite antenna is used for to the satellite transmission satellite-signal;
Receiver is used for from the satellite receiving satellite signal.
Detailed description to preferred embodiment can make the present invention more clear in conjunction with the drawings, in the accompanying drawing,
Fig. 1 is the schematic block diagram of satellite multimedia service system;
Fig. 2 is the block diagram of satellite multimedia service system preferred embodiment;
Fig. 3 is the operation flow sheet of explanation satellite multimedia service system operation;
Fig. 4 is the structure chart of IP head;
Fig. 5 is the block diagram of connector between the satellite multimedia network among Fig. 2;
Fig. 6 is the block diagram of satellite Rx card among Fig. 2.
With reference to figure 1, this is the schematic block diagram of satellite multimedia service system 100, and it comprises 1, two reception of satellite (Rx) antenna 2-1 and 2-2, two satellite Rx card 3-1 and 3-2, a personal computer (PC) 4, one station servers 5, continent net 6 and central office 10.Central office 10 comprises an information provider unit 7 and 8 and transmissions of a satellite multimedia gateway (SMG) (Tx) antenna 9.
Satellite multimedia service system 100 not only provides satellite broadcast service, but also non-equilibrium interactive multimedia service is provided, such as the service of high speed satellite Internet, multiple spot data, video and audio distribution service.
The a plurality of users that use the personal user of PC and be connected with the server 5 of satellite multimedia service are optionally provided multimedia service respectively.When the service of request satellite Internet, a data request is sent on the industrial siding by continent net 6 (for example public switch telephone network (PSTN), Integrated Service Digital Network and Public Switched Data NetWork (PSDN) etc.), this industrial siding checks whether this request of data is eligible, the requested data that provided from information provider unit 7 are sent to SMG 8, send on Rx antenna 2-1 and the 2-2 through satellite 1 from Tx antenna 9 then.
Handle the data after personal user and each user are just obtained handling by PC 4 and server 5 respectively then from data process among satellite Rx card 3-1 and 3-2 of Rx antenna 2-1 and 2-2 reception.
With reference to figure 2, this is the block diagram of the satellite multimedia service system 110 of preferred embodiment, and this system comprises satellite 1, Rx antenna 2,3, one personal computers of satellite Rx card (PC/ server) 5, continent net 6, information provider unit 7, SMG 8, Tx antenna 9, satellite Internet server (SIS) 13, Internet information provider unit 18, multiple spot data message generator 19 and industrial siding 20.SMG 8 comprises an interface unit 11 and a radio frequency unit 12.SIS 13 comprises 14 and Subscriber Management Systems 15 of satellite agency.Industrial siding 20 comprises a fiber data distribution interface 16 and a terminal server 17.
When the user of computer (PC/ server) 5 obtains the satellite multimedia service, and computer 5 is when being coupled with continent net 6, produces request of data and is sent to the terminal server 17 of industrial siding 20 by continent net 6 at computer 5.Terminal server 17 checks whether this user is eligible.When the satellite agency 14 of this user SIS 13 when being eligible retrieves requested information.
If requested data storing is in satellite agency 14, then Yu Ding user's information is recorded in the Subscriber Management System 15, and requested data are sent to SMG 8.Otherwise satellite agency 14 just obtains the data of being asked from one of information provider unit 7, Internet information provider unit 18 and multiple spot data message generator 19, and these data are sent to SMG8.
On the other hand, multiple spot data message generator 19 provides the multiple spot data through the FDDI 16 of industrial siding to SMG8.Predetermined user's information to these multiple spot data is handled in SMG 8.And these multiple spot data also can be provided directly to the interface unit 11 of SMG 8, shown in dotted arrow among Fig. 2.
For multimedia service being provided and improving transmission speed, the present invention has adopted some specific technology, will be illustrated below.
The present invention has adopted the suggestion of request note 1 323 (RFC1323) window scale satellite agency 14, is used for the service of satellite Internet, to improve the performance limitations of the satellite link that causes owing to conventional transmission control protocol (TCP) the window scale of using.RFC1323 is TCP suggestion to the high-performance expansion for the speed that improves Internet engineering duty ability (IETF).That is to say that the window scale of the 230-byte of the preferred embodiment of the present invention is that the 216-byte is much longer than conventional system maximized window scale, therefore, thereby the number of times that has reduced true receipts has improved transmission speed.
In the present invention, adopted the DVB/MPEG-2 that in single data flow, video, audio frequency and data is put together and sent, therefore, resembling service of satellite Internet and multiple spot data, video and the more such multimedia services of audio distribution service can provide with satellite broadcasting.
Simultaneously, in the present invention, adopted peripheral cell interface (PCI) bus and the plug and play (P﹠amp more than 32; P) system is as the interface between satellite Rx card 3 and the computer 5.By PCT bus and P﹠amp; The use of P system, the present invention can send the so large-scale information of real time kinematics picture that resembles apace.
And the present invention has adopted the web-browser of popularizing.
Simultaneously, by using the resonance frequency band of 950-2150MHz, just can realize the broadband transmission.And owing to adopted the send mode identical with digital satellite broadcasting, satellite broadcasting also can equally with the satellite multimedia service be carried out.
Below, will be in conjunction with the operational circumstances of Fig. 2 and 3 explanation satellite multimedia service systems 110.
Operating process comprises that connection is provided with step, normal forwarding step and cancellation Connection Step.
In connection step 301 in the step is set, the user of computer 5 sends a paging signal by continent net 6 to terminal server 17.
In connection step 302 in the step is set, terminal server 17 is confirmed to SIS 13 request users.
In connection step 303 in the step is set, the Subscriber Management System 15 of SIS 13 is confirmed the user of computers 5, promptly sends the result that the user is confirmed to terminal server 17.
In connection step 304 in the step is set, if the user of computer 5 is legal, then terminal server 17 distributes an IP (IP) address for the user of computer 5.
Fig. 4 has shown the IP head structure according to the IP datagram form, comprises version field 411, constant length field 412, type of service field 413, length overall field 414, identifier field 415, attribute field 416, subregion compensation (division offset) field 417, life period field 418, protocol fields 419, head affirmation field 420, source IP address field 421, target ip address field 422, Option Field 423, inserts field 424, information field 425.
For illustrative purposes, respectively IP address, satellite Agent IP address, information provider unit IP address, Internet, multiple spot data message generator IP address are called IP below
U, IP
P, IP
I, IP
IPThe source IP address of each IP head and target ip address then are expressed as IP
S/ IP
D
As user during to SIS 13 solicited messages, IP
U/ IP
IBe set as the IP header addresses.If determine requested information storage in satellite agency 14, the IP header addresses is converted into IP
P/ IP
UAnd the IP head is sent to Internet information provider unit 18.After obtaining requested information, the address is converted into IP
I/ IP
P, and the IP head is sent to satellite agency 14.In satellite agency 14, the IP header addresses is converted into IP
P/ IP
U, and the IP head is sent to Subscriber Management System 15.
If institute's information requested is not stored among the satellite agency 14, then the address transition of IP head is IP
P/ IP
I, the IP head is sent to internet information generator 18.After obtaining institute's information requested, described address is converted into IP
I/ IP
P, the IP head is sent to satellite agency 14.Act on behalf of 14 places at satellite, the IP head is converted into IP
P/ IP
UAnd deliver to Subscriber Management System 15.
Similar to the service of satellite Internet, multiple spot data distribution service also provides by SIS 13.When having the IP address ip
IPMultiple spot data message generator 19 when SIS 13 provides the multiple spot data, satellite agency 14 is an IP datagram with the multiple spot data processing, to be sent to SMG 8.Multiple spot data distribution service is handled in SMG 8 with the different predesignated subscriber's information of multiple spot data that are of satellite Internet service.
With reference to figure 5, this is the block diagram of explanation SMG 8 embodiment.SMG 8 comprises interface unit 11 and RF unit 12 as shown in Figure 2.SMG 8 also comprises resource and Subscriber Management System 507, beacon signal receiving system 513 and supervision/warning/control (MAC) system 514.Interface unit 11 comprises video encoder 501, audio coder 502, data encoder 503, router/bridge 504, multiplexer 505 and quantizer 506.RF unit 12 comprises forward error correction/right angle phase shift keying (FEC/QPSK) modulator 508, equalizer 509, up-converter 510, up-link power controller (UPC) 511 and high power amplifier (HPA) 512.
At SMG 8, satellite Internet information multiple spot data, video and audio frequency send data flow by single DVB/MPEG-2 and lump together to send to the user of computer 5 through Tx antenna 9, satellite 1 and Rx antenna 2.
The IP datagram of the satellite Internet information that transmits from SIS 13 is received by router/bridge 504 and is encoded data encoder 503 then.The multiple spot data directly transmit from multiple spot data message generator 19, or transmit as satellite Internet information from SIS 13.On the other hand, video and audio frequency are provided from information provider unit 7 and encode respectively in video encoder 501 and audio coder 502.
Data after being encoded, video and audio frequency by multiplexed, are quantized with the DVB/MPEG-2 mode in quantizer 506 in multiplexer 505 then.Inserting title administrative messag (EMM) then is inserted in the transmission information flow, so that there is the user of eligible EMM can access the multiple spot data, services.RSMS 507 is coupled with quantizer 506, to produce pay imformation as serving service time and amount of information to the user of multiple spot data distribution service according to predetermined parameters.This pay imformation also sends satellite Rx card 3 to.
At FEC/QPSK modulator 508, the data flow of coming from quantizer 506 is by the known QPSK method modulation of the FEC method of known source code and chnnel coding, to deliver to equalizer 509.The known equalization methods that equalizer 509 adopts.
In up-converter 510, be converted into RF signal from the data flow of equalizer 509 with wide resonance frequency band, for example have the signal of 950-2150MHZ bandwidth, thereby make the user can receiving satellite broadcast.
At UPC 511, use the beacon signal of receiving from beacon signal receiving system 513 to control from the RF signal level of up-converter 510 in each scheduled time, to keep a predetermined level under rainy day decay environment.At HPA 512, the RF signal is exaggerated and delivers to Tx antenna 9 then.
MAC system 514 is coupled by Local Area Network and RSMS 507, beacon signal receiving system 513, with control, supervision, warning and control each hardware wherein.
With reference to figure 6, this is the block diagram of satellite Rx card 3, this card comprise a tuner 601, qpsk demodulator 602, FEC demodulator 603, one go quantizer 604, one to go multiplexer 605, Video Decoder 606, audio decoder 607, pci interface bus 608 and a user to receive limiting unit 609.
The resonance frequency of receiving from Rx antenna 2 is that the RF signal of 950-2150 is sent to the tuner 601 of Rx antenna 2, and in tuner 601, the RF signal is transferred to base band.This baseband signal is demodulated into data flow at qpsk demodulator 602 and FEC demodulator 603 successively.This data flow is gone to quantize in removing quantizer 604, is gone multiplexedly then in removing multiplexer 605, becomes video, audio frequency and data that the IP datagram form is all arranged separately.The IP datagram of video is decoded at Video Decoder 606, and the IP datagram of audio frequency is decoded at audio decoder 607, and the IP datagram of the data of satellite Internet and multiple spot data distribution service is sent to computer 5 through pci interface bus 608.
The user receives limiting unit 609 and goes quantizer 604 to be coupled, with the pay imformation that among the RSMS 307 that is stored in SMG 8 user of multi-medium data distribution service is produced.
Although disclose the present invention, can easily make various improvement on the basis of the spirit and scope of the invention that those skilled in the art describes in detail in violation of a right does not require, replenish and replace with reference to certain embodiments.
Claims (15)
1. satellite Internet service method is provided, comprises the steps:
Connection request to a user is confirmed;
Set up user's connection and give this user an IP address assignment;
Receive an information request there from the user;
If this requested information should requested information send a satellite multimedia gateway in a satellite agency;
If requested information just receives this requested information and sends this information to the satellite multimedia gateway from the Internet information provider unit not in this satellite agency;
In the satellite multimedia gateway, should requested information change, to send to the user via satellite; With
Receiving collect mail really breath and cancellation of user connects.
2. comprise the steps: according to the switch process that the process of claim 1 wherein
Institute's information requested is encoded;
Carry out multiplexed to coded information;
Multiplexed information is quantized;
Information after quantizing is carried out source code and chnnel coding;
Information behind the coding is carried out equilibrium;
Information frequency after the equilibrium is transformed into a radio frequency;
Information after the amplification frequency conversion for the first time is to remain on signal level the value higher than the predetermined value under the rainy day damp condition.
The information of amplifying is for the first time carried out high power amplify, to send on the satellite through satellite antenna; With
To send to the user by the information that satellite received.
3. according to the process of claim 1 wherein that the scale of the window data bag that satellite is acted on behalf of meets request note 1 323 (RFC 1323) suggestion.
4. according to the method for claim 2, wherein the scale of satellite agency's window data bag meets request note 1 323 (RFC 1323) suggestion.
5. the satellite multimedia service method is provided, comprises the steps:
Connection request to a user is confirmed;
If user request is the service of satellite Internet, then connect for this user and with an IP address assignment to this user;
Receive an information request there from the user;
According to user institute requested service type, will be sent to the satellite multimedia gateway by user's information requested from one of satellite Internet server, Internet information provider unit, multiple spot data message generator, video and audio-frequency information generator;
In the satellite multimedia gateway, should requested information change, to send to the user via satellite; With
Receiving collect mail really breath and cancellation of user connects.
6. according to the method for claim 5, forwarding step wherein comprises the steps:
If institute's requested service is the service of satellite Internet, and institute's information requested should requested information send the satellite multimedia gateway in a satellite agency;
If institute's requested service is the service of satellite Internet, and institute's information requested then receives this requested information and sends this information to the satellite multimedia gateway from the Internet information provider unit not in the satellite agency;
If institute's requested service is video and audio distribution service, then receives this requested information and should requested information send the satellite multimedia gateway to from video and audio-frequency information generator.
7. according to the method for claim 5, switch process wherein comprises the steps:
Institute's information requested is encoded;
Carry out multiplexed to coded information;
Multiplexed information is quantized;
Information after quantizing is carried out source code and chnnel coding;
Information behind the coding is carried out equilibrium;
Information frequency after the equilibrium is transformed into a radio frequency;
Information after the amplification frequency conversion for the first time is to remain on signal level the value higher than the predetermined value under the rainy day damp condition.
The information of amplifying is for the first time carried out high power amplify, to send on the satellite through satellite antenna; With
To send to the user by the information that satellite receives.
8. satellite multimedia service system, it can carry out the service of satellite Internet, multiple spot data distribution service and video and sends with audio frequency and serve, and this system comprises:
Satellite;
The terminal resource generator is used for the service request that receives from a plurality of users is delivered to special circuit;
Internet resource generator, be used to check whether the user is validated user, if and service request is satellite Internet service, just select one of following operation: i.e. retrieval wherein the information that is requested or receive institute's information requested there from the Internet information provider unit;
The satellite multimedia gateway device, be used for receiving requested information from one of Internet resource generator, multiple spot information provider unit and video and audio frequency generator according to service request, and the information translation that is received become satellite-signal, this signal has the required predetermined format of satellite communication;
Satellite antenna is used for to the satellite transmission satellite-signal;
Receiving system is used for from the satellite receiving satellite signal.
9. system according to Claim 8 is characterized in that described Internet resource generator comprises:
The satellite agent apparatus is used to store predetermined information, and provides institute's information requested to the satellite multimedia gateway device when institute's information requested belongs to stored information; With
The user management device is used to check whether the user is validated user.
10. system according to Claim 8 is characterized in that described receiving system sends institute's information requested with peripheral cell interface (PCI) bus to the user.
11. system according to Claim 8 is characterized in that described receiving system utilizes the system of plug and play to send institute's information requested to the user.
12., it is characterized in that the scale of described satellite agency's window data bag meets request note 1 323 (RFC 1323) suggestion according to the system of claim 9.
13. system according to Claim 8 is characterized in that described satellite multimedia gateway device comprises:
Code device is used for the institute's information requested from information provider unit is encoded;
Multiplex machine is used for carrying out multiplexed to the coded message of receiving from described code device;
Quantization device, be used for to receive from described multiplex machine multiplexed after information quantize;
Code device is used for the information after the quantification of receiving from described quantization device is carried out source code and chnnel coding;
Balancer is used for the information behind the coding of receiving from described code device is carried out equilibrium;
Last conversion device, the information translation after the equilibrium that is used for receiving from described balancer is a radiofrequency signal; With
Amplifying device, the radiofrequency signal that is used for receiving from described upward conversion device is converted to high-power signal.
14. according to the system of claim 13, it is characterized in that described satellite multimedia gateway device also comprises resource and user management device, this device is according to service service time and amount of information producing charge data.
15. according to the system of claim 14, it is characterized in that described satellite multimedia gateway device also comprises the marking signal receiving system, be used in each scheduled time compensation rainy day decay.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR77191/97 | 1997-12-29 | ||
| KR77191/1997 | 1997-12-29 | ||
| KR1019970077191A KR100248674B1 (en) | 1997-12-29 | 1997-12-29 | Method and apparatus for providing satellite multimedia services |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230056A true CN1230056A (en) | 1999-09-29 |
| CN1136671C CN1136671C (en) | 2004-01-28 |
Family
ID=19529508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981265138A Expired - Fee Related CN1136671C (en) | 1997-12-29 | 1998-12-29 | Method and system for providing satellite multimedia service |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100248674B1 (en) |
| CN (1) | CN1136671C (en) |
| ID (1) | ID21619A (en) |
| MY (1) | MY136277A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431299C (en) * | 2003-04-01 | 2008-11-05 | 艾利森电话股份有限公司 | Method and system for centrally allocating addresses and port numbers |
| CN109862055A (en) * | 2017-11-30 | 2019-06-07 | 中兴通讯股份有限公司 | A kind of satellite network communications method, agent service device and gateway |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100588730B1 (en) * | 1999-12-08 | 2006-06-13 | 주식회사 케이티 | Method for mobile internet users to access content provider |
| KR100353378B1 (en) * | 2000-03-17 | 2002-09-18 | 주식회사 텔리맨 | Satellite internet service method |
| KR20010106626A (en) * | 2000-05-22 | 2001-12-07 | 김종욱 | Remote education method using satellite and device therefor |
| KR20010112732A (en) * | 2000-06-12 | 2001-12-21 | 최수탑 | System and method for data transmitting/receiving with wake-up ability to receiving device |
| KR100406663B1 (en) * | 2000-10-31 | 2003-11-21 | 에이피위성산업 주식회사 | satellite two direction system using W-CDMA WLL |
| KR100404757B1 (en) * | 2001-12-28 | 2003-11-07 | 한국전자통신연구원 | A satellite asynchronous transfer mode matching apparatus for transferring an internet and a video data to satellite network and the matching method thereof |
| KR20030086706A (en) * | 2002-05-06 | 2003-11-12 | (주)스카이드림넷 | The remote education methol and equipment for duplex satellite |
| KR100473608B1 (en) * | 2002-11-27 | 2005-03-10 | 한국전자통신연구원 | Network Interface Unit for Interworking between Satellite Network and Terrestrial Network |
-
1997
- 1997-12-29 KR KR1019970077191A patent/KR100248674B1/en not_active IP Right Cessation
-
1998
- 1998-12-29 MY MYPI98005920A patent/MY136277A/en unknown
- 1998-12-29 ID IDP981696A patent/ID21619A/en unknown
- 1998-12-29 CN CNB981265138A patent/CN1136671C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431299C (en) * | 2003-04-01 | 2008-11-05 | 艾利森电话股份有限公司 | Method and system for centrally allocating addresses and port numbers |
| CN109862055A (en) * | 2017-11-30 | 2019-06-07 | 中兴通讯股份有限公司 | A kind of satellite network communications method, agent service device and gateway |
| US11558111B2 (en) | 2017-11-30 | 2023-01-17 | Zte Corporation | Satellite network communication with proxy service apparatus for acquiring targeted resources |
Also Published As
| Publication number | Publication date |
|---|---|
| ID21619A (en) | 1999-07-01 |
| KR19990057145A (en) | 1999-07-15 |
| KR100248674B1 (en) | 2000-03-15 |
| CN1136671C (en) | 2004-01-28 |
| MY136277A (en) | 2008-09-30 |
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