CN1143541C - Interactive communication system comprising users connected in groups - Google Patents
Interactive communication system comprising users connected in groups Download PDFInfo
- Publication number
- CN1143541C CN1143541C CNB998049948A CN99804994A CN1143541C CN 1143541 C CN1143541 C CN 1143541C CN B998049948 A CNB998049948 A CN B998049948A CN 99804994 A CN99804994 A CN 99804994A CN 1143541 C CN1143541 C CN 1143541C
- Authority
- CN
- China
- Prior art keywords
- user terminal
- transmission medium
- group
- main website
- convergent point
- 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.)
- Expired - Fee Related
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Classifications
-
- 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]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
- H04N21/6193—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via a satellite
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/165—Centralised control of user terminal ; Registering at central
Abstract
The invention relates to a communication system comprising a transmission medium, users connected in groups to the transmission medium through a convergence point, and a main station designed to receive data transmitted by the users over the transmission medium. The access to the transmission medium is limited for one and the same group of users at any given moment. According to the invention, the main station comprises means for assigning to the users access rights to the transmission medium by taking into account their membership of a group of users.
Description
Technical field
The present invention relates to a kind of communication system, it comprises one in main website be used for providing communication media between at least one convergent point of service to one group of user, and described convergent point has a specific transmittability on transmission medium.
The invention still further relates to a main website and a user side that in this system, uses.
The present invention is applied to SMATV (satellite master antenna television) system especially.
Background technology
This type systematic can produce following problem: convergent point has the transmitting device of a given ability on transmission medium, and like this at any one given time, same group of user is restricted the visit of transmitting device.
For example, technical report TR101 201 V1.1.1 that announced in October, 1997 by ETSI have described a kind of mutual SMATV distributed system.In this system, one group of shared same transmitter of user and same transmitting antenna are to be used for the main website emission request to communication system.Because transmitter only can be launched a carrier wave at any given time, this just means at any given time to have only a user to launch.
Therefore, management devices need be managed the visit of same group of user to transmission medium.
Fig. 1 shows the solution that proposes in described document.It is that a satellite transmission network 1 links together with cable network 2: convergent point 3 is that antenna 4 is connected alternative satellite terminals 5 via satellite, and then ICBM SHF satellite terminal 5 is connected with the central station 6 of spider lines 2 and forms.The central station 6 of cable network 2 is from the say so head end (head) of cable network of the meaning of the suggestion ETS300 800 of ETSI.It is served end user 7 and interface with satellite transmission network is provided.Satellite transmission network is regarded it as unique user, and the end user is unknown for satellite transmission network.
This solution relates to following problem: on the meaning of suggestion ETS300 800, central station 6 is head ends of cable network.It correspondingly comprises a more expensive equipment.The cost of this equipment is shared by the user of network 2.Therefore, this solution only is only economically viable under network 2 comprises abundant user's situation.
Summary of the invention
The purpose of this invention is to provide a kind of effective and inexpensive solution to be used for small group of users.Desired system, main website and user terminal in the claim 1,5 and 7 of present patent application have been used in the realization of this purpose.
In system according to the present invention, be the path of main website between management convergent point and user.Consider the situation that user on the same group is restricted the visit of transmission medium, main website directly distributes reserve part on transmission medium.Under the situation of interactive sts satellite transmission system, the air time of main website on user's distributing carrier wave guaranteed the not identical time interval on the different user distribution different carrier of same user's group at interval.
This solution advantage economically is:
The management of-reserve part has been switched to the main website of communication system, exists like this
The convergent point one-level no longer needs the management devices of these reserve parts,
-use non-special use, non-standard material (, less from the angle of industry
The special use that amount is used, the product of nonstandardized technique material and exploitation thereof are very expensive
).
In the first embodiment of the present invention, main website has and can to comprise the configuration of communication system, particularly organize user's subordinate relation information about a user by the artificial table of programming of the keeper of communication system.
In a further advantageous embodiment, each user of user's group has one can discern its affiliated user and the identifier of group, and they comprise transmitting device, create when being connected when them and communication system, and transmitting device is used for sending described identifier to main website.
This identifier forms by being formatted as two partly the physical addresss (MAC Address) of terminal, first's identification convergent point, and second portion is discerned this terminal.When user and system connected, this physical address was to send with the address field form that message is created in the connection of user's emission.
The automatic study that this solution makes the user's that basis and communication system connect address carry out main website is treated as possibility.Thereby needn't carry out human configuration in the case and operate.
The invention still further relates to a kind of method according to the defined distribution reserve part of claim 9 and a kind of according to the defined user identification method of claim 10.
Description of drawings
By following description with reference to the accompanying drawings, the present invention will be more readily understood and further details will become clear, accompanying drawing is that the form with unrestricted example provides, and wherein:
Figure 1 shows that the system of prior art,
Fig. 2 and 3 is depicted as according to communication system of the present invention,
Figure 4 shows that physical address format according to user side of the present invention,
Figure 5 shows that the form that sends to the connection message of main website by user side, and
Figure 6 shows that by main website according to the present invention reserve part is assigned to a kind of method on the transmission medium.
Embodiment
Figure 2 shows that according to communication system of the present invention.This system comprises two transmission mediums 9 and 10.Transmission medium 9 is a kind of distributed mediums, and it can make main website 11 give user T data allocations
i(i=0,1,2,3,4).Transmission medium 10 is formed a return path, and it can make user T
iRequest is sent to main website 11.Main website 11 has the accessing points 14 of a transmission medium 10.User T
i(i=1,2,3,4) are that the user organizes a part of 15, and the user organizes 15 and is connected with transmission medium 10 through convergent point 16.User T
0It is a unique user.It is connected with transmission medium by individual access point 17.
The present invention relates to all communication systems of type shown in Figure 2, wherein convergent point 16 has a confined transmittability on transmission medium 10, and therefore at any one given time, same group user is restricted the visit of transmission medium 10.Transmission medium 10 is to be formed by radio wave link or satellite link.
According to the present invention, main website 11 according to user group they subordinate relation and to user T
iDistribute the reserve part (reservation) on the transmission medium.In order to realize this purpose in a preferred embodiment of the invention, each user is given one can discern the user under it and the identifier of group.Thereby the user is sent to main website to this identifier after being connected with transmission system.
This identifier is by terminal T
iPhysical address form, it transmits when main website 11 sends each connection request at a terminal.A kind of specific physical address format is applied to this: this physical address is formatted as two parts at least, part identification convergent point, and another part is discerned this terminal.
In first embodiment, by the first address part A1 that is stored in convergent point or terminal access point be stored in the second address part A2 in the terminal all terminal addresss of formation that are together in series.
In a second embodiment, two kinds of different physical addresss can be connected to pattern (the single or in groups) VAS application-to-terminal service of transmission medium according to terminal.In order to realize this purpose, physical address part A 2 and complete physical address A3 are stored in the terminal.If terminal is to connect with single pattern, then physical address A3 is distributed to terminal, this address is stored in this terminal fully.If terminal connects with group schema, then by be stored in the physical address part (A2) in the terminal and be stored in the convergent point physical address partly (A1) the formed physical address that is together in series be assigned to this terminal.Single or the connection mode in groups of terminal (and using the address thus, A3 or A1 that links together and A2) is represented that by state variable S variable S is stored in the terminal and its value defines between erecting stage in terminal.
The realization of this second pattern can make set of terminal obtain more address.
In case receive connection request, main website 11 just company terminal physical address deposit in the table.Main website 11 is used to distribute terminal that the table of reserve part the is sent to communication system subordinate relation with the associated terminal that is used for determining one group of terminal to this.
Figure 3 shows that example according to interactive SMATV compartment system of the present invention.
In this system, main website 11 distributes to user side T to data and control information through satellite 20
iThese user T
iBy this identical satellite 20 data and request are sent to main website 11.
Following description will only relate to the operating principle that those understand mutual sts satellite transmission system essential to the invention.More details can be seen in the technical report TR101 of ETSI 201V1.1.1.
In order to communicate with main website, the terminal of mutual satellite communication system is passed through an access mechanism access transport medium, for example a kind of TDMA (time division multiple access) mechanism that makes up with frequency division FDMA (frequency division multiple access).
Therefore, each carrier wave is subdivided into the time interval, and the time interval is associated with different access module.The following time interval is used especially:
-can with the time interval and all terminals of contention mode visit
It is carried out free access, have the risk (calculation that typically manages conflict of conflict
Method is used to solve any contingent conflict).These contention intervals are special
Use by the terminal that connects with communication system.
-in case reservation just can be visited and in a single day main website 11 receives from end
The time interval that the request of end just dynamically provides.Request passes in the contention interval
Send, the effective load data in the time interval that provides by main website perhaps is provided before
Afterwards.
Can produce following problems by reflector when antenna is connected with transmission medium in groups in terminal: reflector only can send and receive a carrier wave at any one given time.Therefore, main website can not distribute to same group user to the identical time interval on the different carrier.
In order to address this problem, the terminal of communication system has been used a kind of special address format.
In fact, each terminal of communication system shown in Figure 3 has the address (being called MAC Address) of a 48-bit, it each terminal be fixed the coding or it provide by external source.For example, can select to make these MAC Address to have form shown in Figure 4.
-two the highest-order bit (b0 and b1) be used to guarantee with according to IEEE802.2
The address compatibility of standard definition.According to 802.2 standards, the physical address of a terminal
Encode with 48 bits.The highest-order bit (b0) represent it be one individually
Location or group address (making of the group address in the DAF destination address field of a frame
With making several terminals can receive identical frame).Next bit (b1) is used for fixed
The character of location, free burial ground for the destitute, the part or overall.Given network is passed through in the local address
The keeper who is responsible for manages and is only effective in this network, and globally
Location (being also referred to as general address) is unique on planetary stage and is managed by IEEE
Reason, it distributes to various manufacturers with them.In order to ensure with the IEEE802.2 standard
Defined address compatibility, the selection that do in this place should be mutually b0=b1=1 (according to
The partial groups address of IEEE802.2 standard).
-following 20 bits (b2-b21) are used to discern convergent point,
-following six bits (b22-b27) are used for the identification terminal manufacturer,
-last 20 bits (b28-b47) are used for identification terminal.
In first embodiment, the part A 1 of the address of one 22 bit long is stored in each accessing points and each convergent point (promptly be connected antenna and terminal and guarantee especially in the device of function of frequency translation), and the part A 2 of the address of one 26 bit long is stored in each terminal that convergent point connects therewith.
In a second embodiment, the part A 1 of the address of 22 bit long is stored in each convergent point, and following part is stored in each terminal:
The complete address of-one 48 bit, it is a single general address
(b0=b1=0) and it when terminal is connected with single pattern with transmission medium, use,
The part A 2 of the address of-one 26 bit long, it corresponds respectively to last two
Six and 20 bits of group, and it uses when terminal connects with group schema.
In the case, this address part and the address that is stored in 22 bits in the convergent point
Part is cascaded to form a 48-bit addresses that constitutes the terminal physical address.
In this second embodiment, should use which address by the state variable S indication that is stored in the terminal, described variate-value defines between erecting stage in this terminal.
These two embodiment can coexist as in the same communication system.
But terminal connects by the transmission and the transmission system of the connection message in the time interval of contention access.Fig. 5 shows these connection messages.Specifically, they comprise the address field F1 that comprises the terminal physical address with comprise ask to be connected characteristic (data rate of being asked, COS ...) and data field F2.
The group of terminal known immediately automatically by the main website that receives these link informations.
Consider their subordinate relation of user group, main website 11 distributes reserve part on the transmission medium to the user, does not just offer same group of user on the different carrier so at the same time at interval.Fig. 6 shows the example of the inventive method that reserve part is provided.The method can provide n to the n that is connected with communication system terminal Ti
iReserve part.In the example herein, each reserve part is formed by a pair of (time interval/carrier wave).Main website is to each terminal T
iStep below carrying out:
-step 100: it is at terminal T
1..., T
I-1Among (promptly between the terminal of given reserve part) search and terminal T
iBelong to those terminals of same group.In the following description, this group is known as group G
KIf terminal T
1..., T
I-1In have at least a terminal belong to the group G
k(the arrow Y among the figure), this method advances to step 110.If not words (the arrow N among the figure), then it advances to step 120.
-step 110: main website provides n
iReserve part is given terminal T
iThe time interval S of these reserve parts
j(T
i) (j=1 wherein ..., n
i) selected so that they be different from offer the group G
KTime interval of reserve part of terminal.This operation is represented with following mathematical formulae in the drawings:
-step 120: main website distributes n with any means
iTerminal T
iAccess right.
In a preferred embodiment, comprise listening device, be used to listen to the distribution that other user carried out to their groups by main website as the user of the part of user group; And control device, if main website has offered another user on the same group to a time interval (on another carrier wave), then be used to stop using can be with this same time interval of contention mode visit for this control device.Described listening device is to analyze the signal message that is sent by main website 11, and this information has provided the structure of each carrier wave frame on the horizon.If main website comprises the device that is used for give user on the same group from the selected allocation of carriers of carrier subset, send the inventory that is easy to the carrier wave relevant with being used for to one group of user with them, be the device of inventory of the carrier wave of uppick, then this listening device is limited in the carrier wave of given number.
The foregoing description can not be avoided two contention intervals that user capture is identical on the same group, if this time interval is not also offered phase terminal on the same group by main website.In a further advantageous embodiment, by before transmission, introducing the risk that the power measurement device can limit this conflict.Determine to a single transmission it is that normal power supply threshold value and the comparison of using this threshold value to carry out power supply potential can determine whether that several users attempts transmitting data at interval at the same time, and the words that in this case stop transmission.
An example has been described, wherein terminal according to dividing with the time of Frequency Distribution combination by multiple access mechanism access transport medium.This example is not restrictive.For example, if be that CDMA (code division multiple access) mechanism also can use the present invention to the multiple access mechanism of transmission medium.
In described example, transmission medium 9 and 10 all can be formed by satellite link.But broadcast medium can be different types with return path.
Claims (10)
1. communication system, be included in main website and be used for providing transmission medium between at least one convergent point of service to one group of user terminal, described convergent point has the device that is used for by described some transmission medium data, described transmitting device has such transmittability so that a given moment, same group user terminal is restricted the visit of described transmission medium, it is characterized in that main website comprises to be used for by considering group that described user terminal belongs to and distributing the device of the reserve part on the transmission medium to the transmittability of the described group of convergent point that service is provided to user terminal.
2. communication system according to claim 1, each user in it is characterized in that organizing:
-have the identifier that can discern described user terminal and described group, and
-be included in the transmitting device that when connecting described identifier is sent to main website with communication system.
3. communication system according to claim 1 is characterized in that described transmission medium comprises satellite link, and described convergent point comprises the antenna in groups that is connected with satellite launch vehicle, and described satellite launch vehicle is connected with described user.
4. communication system according to claim 1 is characterized in that described transmission medium is shared on time and frequency at least, and described reserve part is at least corresponding at least one transmission frequency of a preset time.
5. main website, be applicable to by transmission medium and receive data from least one convergent point of serving one group of user terminal, described convergent point has the device that is used for by described some transmission medium data, described transmitting device has such transmittability so that a given moment, same group user terminal is restricted the visit of described transmission medium, it is characterized in that main website comprises to be used for by considering group that described user terminal belongs to and distributing the device of the reserve part on the transmission medium to the transmittability of the described group of convergent point that service is provided to user terminal.
6. main website according to claim 5, it is characterized in that each user terminal of one group has the identifier that can discern described user terminal and described group, described main website comprises the device of the identifier that is used to store the user terminal that connects with communication system and is used for determining by described identifier whether different user terminals belongs to same group device.
7. user terminal is applicable to it is characterized in that described terminal comprises at least as by the part of convergent point access transport medium with one group of user terminal communicating with main website:
-be used to store the storage device of first identifier part of the described user terminal of identification,
-be used to obtain discern the device of second identifier part of described convergent point,
-be used for described first and second identifiers are partly coupled together forming the device of an identifier,
-and the transmitting device that is used for when connecting with communication system, sending to main website described identifier.
8. user terminal according to claim 7 is characterized in that described identifier is that the physical address that the form that sends to the connection message of communication system with user terminal when connecting with communication system sends to the terminal of main website forms.
9. one kind is used for using the method for distributing the reserve part on the transmission medium with to user terminal in the main website of communication system, it is characterized in that comprising:
-confirm whether user terminal belongs to the one group of user's who is connected with transmission medium by the convergent point with a specific transmittability step, and
-when described user terminal is connected to transmission medium by convergent point, considers the transmittability of group that described user terminal belongs to and described convergent point and distribute reserve part to described user.
One kind in comprising the user's communications system that is connected with transmission medium by convergent point identification the user method, it is characterized in that comprising that distributing to described user terminal is formatted as two-part identifier, first discerns described user terminal and second portion is discerned described convergent point.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR98/15839 | 1998-12-15 | ||
| FR9815839 | 1998-12-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1296699A CN1296699A (en) | 2001-05-23 |
| CN1143541C true CN1143541C (en) | 2004-03-24 |
Family
ID=9534002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998049948A Expired - Fee Related CN1143541C (en) | 1998-12-15 | 1999-12-13 | Interactive communication system comprising users connected in groups |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1055330A1 (en) |
| JP (1) | JP2002533028A (en) |
| KR (1) | KR20010086242A (en) |
| CN (1) | CN1143541C (en) |
| AU (1) | AU1982000A (en) |
| CA (1) | CA2320970A1 (en) |
| WO (1) | WO2000036837A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291554A (en) * | 1992-05-28 | 1994-03-01 | Tv Answer, Inc. | Shared-price custom video rentals via interactive TV |
| US5715515A (en) * | 1992-12-02 | 1998-02-03 | Scientific-Atlanta, Inc. | Method and apparatus for downloading on-screen graphics and captions to a television terminal |
| CA2444170C (en) * | 1992-12-09 | 2009-09-22 | Discovery Communications, Inc. | Reprogrammable terminal for suggesting programs offered on a television program delivery system |
| EP0742670B1 (en) * | 1995-05-08 | 2002-04-03 | The Box Worldwide, Inc. | Interactive video system |
-
1999
- 1999-12-13 EP EP99963572A patent/EP1055330A1/en not_active Withdrawn
- 1999-12-13 KR KR1020007008912A patent/KR20010086242A/en not_active Application Discontinuation
- 1999-12-13 CN CNB998049948A patent/CN1143541C/en not_active Expired - Fee Related
- 1999-12-13 AU AU19820/00A patent/AU1982000A/en not_active Abandoned
- 1999-12-13 JP JP2000588969A patent/JP2002533028A/en not_active Withdrawn
- 1999-12-13 CA CA002320970A patent/CA2320970A1/en not_active Abandoned
- 1999-12-13 WO PCT/EP1999/010050 patent/WO2000036837A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1296699A (en) | 2001-05-23 |
| JP2002533028A (en) | 2002-10-02 |
| WO2000036837A1 (en) | 2000-06-22 |
| AU1982000A (en) | 2000-07-03 |
| KR20010086242A (en) | 2001-09-10 |
| CA2320970A1 (en) | 2000-06-22 |
| EP1055330A1 (en) | 2000-11-29 |
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