CA2444344C - Method for inverse multiplexing - Google Patents

Method for inverse multiplexing Download PDF

Info

Publication number
CA2444344C
CA2444344C CA002444344A CA2444344A CA2444344C CA 2444344 C CA2444344 C CA 2444344C CA 002444344 A CA002444344 A CA 002444344A CA 2444344 A CA2444344 A CA 2444344A CA 2444344 C CA2444344 C CA 2444344C
Authority
CA
Canada
Prior art keywords
data
packet
digital data
buffer
stream
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
Application number
CA002444344A
Other languages
French (fr)
Other versions
CA2444344A1 (en
Inventor
Marc Van Oldenborgh
Martijn Gnirrep
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nonend Inventions NV
Original Assignee
Nonend Inventions NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nonend Inventions NV filed Critical Nonend Inventions NV
Publication of CA2444344A1 publication Critical patent/CA2444344A1/en
Application granted granted Critical
Publication of CA2444344C publication Critical patent/CA2444344C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/14Channel dividing arrangements, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception

Abstract

The invention relates to a method for multiplexing digital data, wherein a packet of digital data is simultaneously sent from front to rear and from re ar to front. Such a method can be used in cordless telephones, computer network s, such as among others the internet, and other networks of devices wherein digital data are exchanged.

Description

Method for inverse multiplexing Field of the invention The invention relates to a method for multiplexing digital data, and software for that purpose.

Background In practice very many methods to send data are known, particularly through a network. An example are digital data that are sent through the internet, but also digital telephone signals, such as for instance in case of cordless GSM telephones.

In practice there are also various methods known for multiplexing digital data.

The data are sent via a medium in the form of data packets. This can take place via a physical cabling in for instance copper or glass fibre, or via infrared or radio waves.

Because the capacity, often coupled to bandwidth, of the media over which the data are being sent mostly is too small, the data are often compressed. However, this has often appeared not to be sufficient.

Additionally many of these methods are aimed at optimising the data transfer between two computers.
Summary of the invention It is among others an object of the present invention to at least partially solve these problems. To that end the invention provides a method for mul-tiplexing digital data, wherein a packet of digital data is simultaneously sent from front to rear and from rear to front. Additionally the invention provides a method for multiplexing digital data, wherein a packet of digital data is simultaneously sent from the beginning of the packet towards the end and from the end towards the beginning. Additionally the invention provides a method for multiplexing digital data, wherein simultaneously a packet of digital data is sent and the same packet is sent backwards.

By splitting the data stream in two simultaneous streams, wherein the one stream starts sending the data from the front and works its way to the rear, and the other stream works its way from the rear to the front, the possibility is given to very quickly send data between and to for instance computers. In most of the cases, the invention relates to sending this data via electromagnetic waves, eg electronically or optically.

Another advantage of the method is that no other control signals or techniques are necessary to reconstruct the entire signal or data packet or to adjust both streams to each other: the signal or data packet is complete when the two streams meet each other, or when the data buffer is full.
Delays in one of either lines do not lead to loss of signal.
In many cases the data connection is a-symmetrical: the transmission capacity is smaller than the receiving capacity. In the method according to the invention it is possible, despite the smaller transmission capacity, to nonetheless use the full receiving capacity. This may for instance be of importance in so-called streaming broadcasts through the internet, wherein through the internet digital radio broadcasts and in future even television or video can take place. Both data streams can also enter via various lines.
For instance the one data stream can for example enter via a telephone line and the second data stream via a cable, the electricity grit or cordiess via GSM. It is also possible to let the data streams enter via one cable by means of physical multiplexing. The invention therefore actually offers a specific form of digital multiplexing.

Preferably the present invention relates to a method as described, wherein a first device sends the data from front to rear to a third device, and a second device sends the same data from rear to front to the third device.
As a result the third device is able to have all data available very quickly.
Preferably the third device places the data in a data buffer the size of the packet, and sends a signal to the first and second device when either the buffer is full, or keeps sending confirmations until the buffer is full. In this way the coordination between both streams is very simple.

It is preferred that in a method according to the invention a first device sends data from front to rear to a second device, and simultaneously backwards to a third device. As a result the possibility is -offered to very quickly provide two devices with all data, with an optimally used bandwidth. In this method it is preferred that the second device and third device immediately at receipt forward the data they received from the first device to each other. As a result both devices can optimally use their bandwidth and transmission capacity.
In said method it is preferred that the second and third device have been provided with a data buffer the size of the packet, wherein the received data are placed in the data buffer and the first and second device send a signal to the first device when the respective data buffer is full.
Additionally the invention relates to a method for sending a data packet to a first device in an organic (also called 'ad-hoc') data network of devices, wherein the devices have been provided with a data processing unit, a data buffer and software having receiving routines for receiving data packets from at least two transmitting devices in the data network, wherein at least two other devices in the network simultaneously send data sub-packets together making up said data packet, at least one device starting with the front sub-packet and sequentially taking the next sub-packet, and at least one device starting with the last sub-packet and sequentially taking a previous one, to said first device, which first device adds together these data sub-packets to form said data packet.
Preferably said software has further been provided with transmission routines for transmitting data packets, received from the transmitting device or devices in the data network to at least one receiving device that is connected to the data network, independent of the transmitting device or devices.
Additionally the invention relates to a method for receiving digital data, wherein a device provided with data storage means creates a data buffer in the data storage means the size of a packet of digital data, and simultaneously receives a first stream of digital data and receives a second stream of digital data, wherein the device fills the data buffer from front to rear with the first stream of digital data and fills the data buffer from rear to front with the second stream of digital data wherein said first and second streams make up a single packet, and said first stream is sent from front to rear, and said second stream is sent from rear to front.
Preferably the device informs the source or sources of the streams of digital data when a data buffer is full. As a result the coordination is simple.
Additionally the invention relates to a method for sending digital data, wherein a device provided with data storage means creates a data buffer in the data storage means, stores digital data in the data buffer, and from the front of the data buffer and the rear of the data buffer sends the digital data in two streams wherein a first stream is sent from front to rear, and a second stream is sent from rear to front.

Preferably the device stops sending after receipt of a signal. As a result the coordination is again simple.

Additionally the invention relates to software provided with routines for carrying out the method according to one of methods mentioned above.
From the above description, in combination with the figures and their description, it will immediately be clear to an expert which routines are necessary to that end, and how said routines have to function with respect to each other. Such software may of course be immediately implemented in hardware, for instance in a PROM, EPROM or the like.

Additionally, the invention relates to a software for sending a packet of digital data, comprising a first transmission routine for sending a first stream of digital data starting from the front of the packet of digital data and a second transmission routine for sending a second stream of digital data starting from the end of the packet of digital data wherein said first stream and said second stream are included in said packet.

Furthermore, the invention relates to software for receiving a packet of digital data, comprising a first receiving routine for receiving a first stream of digital data and a second receiving routine for simultaneously receiving a second stream of digital data, and a first storing routine for storing the first stream of digital data in a memory starting at the front of the memory and filling the memory towards the end, and a second storing routine for storing the second stream of digital data starting at the end of the memory and filling the memory towards the front, and a stop routine for ending the receiving of digital data when the memory is full wherein said first and second streams make up a single packet, and said first stream is sent from front to rear, and said second stream is sent from rear to front.

Furthermore, the invention relates to an apparatus for sending a packet of digital data, comprising memory means for storing the packet of digital data, first sending means for sending a first stream of digital data, starting at the front of the memory means and second sending means for sending a second stream of digital data, starting at the end of the memory means.
Furthermore, the invention relates to an apparatus for receiving a packet of digital data, comprising memory means for storing the packet of digital data, first receiving means for receiving a first stream of digital data, and storing it in said memory means, starting from the front of the memory means, and second receiving means for receiving a second stream of digital data, and storing it in said memory means, starting from the back of the memory means wherein said first and second streams make up a single packet, and said first stream is sent from front to rear, and said second stream is sent from rear to front.

Additionally the invention relates to a carrier provided with software as described, and to a device provided with software as described.

In accordance with one aspect of the present invention there is provided a method for multiplexing digital data, including a packet of digital data having a length, a front and a rear, said packet having a first stream and a second stream, comprising: sending said first and second streams simultaneously, said first stream sent from said front to rear and said second stream sent from said rear to front, where one of said first stream and said second stream is continued to be sent if one of said first and second streams fails or is stalled, sending a second packet, using said second packet to validate said first packet.

- 6a -In a specific embodiment of the invention, packets of digital data are sent in the form of bitstreams. In another embodiment, the packets are divided into smaller sub-packets, for instance numbered 1..n. In this case, the sub-packets are sent 1, 2, etc in the first stream, i.e. sequentially, starting with the first sub-packet, and the sub-packets are sent n, n-1, ... etc in the second stream, i.e.
sequentially, starting with the last sub-packet. In a further embodiment, these two streams are sent almost simultaneous. The two streams can be sent over the same carrier, for instance using conventional multiplexing techniques, or they can be sent over entirely different carriers, for instance cable modem and telephone line. The digital data can also be of another form instead of the now-used binary data.

Brief description of the drawings The invention is further elucidated on the basis of the figures that are exemplary embodiments of the invention. However, the invention is not limited to said exemplary embodiments. Shown in the figures is:

Figure 1 the splitting of one signal into two signals and the adding together at the receiver;

Figure 2 the receipt of a split signal by a receiver from two physically separated sources, Figure 3 the provision of two receivers with one signal, Figure 4 the provision of three receivers with one signal, Figure 5 an alternative for the situation of figure 4, Figure 6 an example of the relation between bandwidth and the quantity of signal, Figure 7 a second example of the relation between bandwidth and quantity of signal, Figure 8A-8C a receiving device, Figure 9A-9C a sending device, Figure 10A-10D a device which receives and almost simultaneously sends, and Figure 11 the process of sending and receiving.
Description of preferred embodiments Figure 1 shows a situation in which a signal 5 in a conventional manner enters a receiver 3. The receiver 3 splits the signal, or each data packet from which the signal has been built up, into two streams 1 and 2 to forward it to receiver 4. Stream 1 is the signal sent from the front, that means the first bit of the data packet or the signal is sent first, then the second, etc. Stream 2 is the signal 5 or a data packet thereof, but then backwards, that means first the last bit is sent then the last but one, etc.
Therefore, as both streams make up the entire stream, the two streams may be considered as complementary streams.

Receiver 4 simultaneously fills its data buffer from the front with signal 1 and from the rear with signal 2. This can take place by means of a com-puter program, but can also be implemented hardware-wise. When the buffer is full, that means the complete signal or data packet has been received, receiver 4 sends a signal to receiver/transmitter 3 that the buffer is full, that means that the signal has been received. It is of course also possible that the receiver 4 keeps sending a signal to receiver/transmitter 3 until the buffer is full, or just closes down the connection when the buffer is full, or sets the port at high or low.

The principle depicted in figure 1, can also be used in figure 2 with 2 sources 3, 3' that transmit to a receiver 4. In that case the sources 3, 3' receive the entire (or already split) signal or data packet 5, and each send a partial signal 1 or 2, respectively, to receiver 4. This offers advantages when the transmission capacity of sources 3 and 3' is lower than the receiving capacity of receiver 4. The receiver 4 may even forward the reconstructed signal or data packet 6 in its entirety again.

Figure 3 shows an example of the method according to the present inven-tion, wherein one source 3 splits a signal or data packet 5 into two complementary streams 1 and 2. The one stream is sent to receiver 4, the other stream to receiver 4'. Both receivers 4 and 4' send what is received to each other, so that both obtain a complete signal or data packet again.
This offers advantages when the transmission capacity/bandwidth of 3 is limited, but/and the capacity between 4 and 4' is sufficient for exchange of data.
Figure 4 shows an example wherein a source 3 splits a signal or data packet 5 into two streams, wherein stream 1 is sent to receivers 4, 4", and stream 2 to receiver 4. Receiver 4' forwards its part of the signal or data packet to 4 and 4", whereas 4 forwards its part to 4'. In the optimal case all receivers 4, 4' and 4" will receive the entire signal or data packet in less time than usually needed in conventional point-to-point connections, or while using less bandwidth.

Figure 5 shows an example of the use of the method according to the invention, wherein a source 3 having limited data transfer capacity splits a signal or data packet 5 into two streams 1 and 2. Stream 1 is sent to receiver 4, stream 2 to receiver 4", and receivers 4 and 4" forward their part to receiver 4'. As a result three receivers have received the entire signal or data packet within less time usually needed to send the packet in its entirety to all three receivers, and the bandwidth used is smaller.

Figures 6 and 7 show calculation examples wherein in case of figure 6 the available bandwidth from transmitter 3 to receivers 4 and 4' is almost the same. In that case receivers 4 and 4' will have received the data in 50% of the usually necessary time, and this is also the load for transmitter 3, seen in bandwidth, only 2 times 50% in total instead of 2 times 100%. Thus, digital data is sent without any overhead (transmitter 3 may stop sending when all data is sent) and very fast.

In the calculation example of figure 7 the connection is a-synchronous.
Receiver 4' receives 91 % of the total data packet, and receiver 4 receives 1 1% of the total data packet. The nett result is that transmitter 3 in the end only needs to send the total data packet once. Additionally there will be a small gain of speed in this unfavourable case. In this case, the sending capacity from transmitter 3 to receiver 4, as well as the sending capacity from receiver 4 to receiver 4'. Due to very lowtransmission capacity from receiver 4 to receiver 4' (or delays) only 9 % instead of 11 % could be transmitted from receiver 4 to receiver 4'.
In figure 8A-8C, the process of receiving a digital data packet split into two streams accoding to the present invention is shown. In figure 8A, two streams 21 and 22 are received and put into data buffer 20. The first part of the received data from stream 21 is put in place 1, the first part of received data from stream 22 is put in place n. I figure 8B, an intermediate step is shown. In this case, via stream 21 the 4th data part is received and is put into buffer at location 4, while via stream 22 also another (n-i th) data part is recieved. Despite the fact that the two streams are not equally fast, no overhead is needed.. In figure 8C, the two streams meet, the buffer is full. This will trigger the device to stop receiving, or send a signal that the digital data packet is complete.

In figures 9A-9C, the sending side is shown. In figure 9A, data buffer 23 is full of data. The device starts taking data from data buffer, starting at the front of the data buffer 23, and starts sending the data. At the same time, the device starts taking data from the back of databuffer 23, position n, and sends this data. In figure 9B, taken some time later, it can be seen that the device takes data part 3 from data buffer 23 and sends it. At the same time, from the rear end of the data buffer the fifth data part is teken and send. The device sequentially takes the next, etc, so the next data parts would be number 4 and the 6th from the back. In figure 9C, the last data parts are taken. Again, it can be seen that sending is swift, and without complex overhead.

Figures 10A-10D show the situation where there is a device which both sends and receives according to the present invention. This time, data buffer 26 is empty, The devive starts receiving data parts via streams 28 and 29, stream 28 is put at the first place, and stream 28 will subsequently fill data buffer 26 from the front to the back. The first data part received from stream 29 will be put into the last position, n, of the data buffer 26. Subsequently, stream 29 will fill data buffer 26 from the back to the front, until the buffer is full.
At the same time, the device starts sending data parts via streams 30 and 31. Stream 30 starts from the front of the data buffer and stream 31 starts from the back of the data buffer.

In figure 10C, it can be seen that in this case, the device receives data parts faster than it sends them. In figure 10C, all the data parts are received: the two streams 28 and 29 meet. The device keeps sending via streams 30 and 31. In figure 10D, the streams 30 and 31 meet, and the device can stop sending. This is afl possible with a minimum on overhead.
In figure 11, The process of sendinq,and receiving are depicted in one .
figure. Apparatus 40 having data buffer 24 sends two streams of data 44 and 45. Apparatus 41 receives these two streams as streams 46 and 47, and puts the data in data buffer 43. Again, the sending apparatus 40 has two streams 44 and 45, one starting at the front and one at the back of data buffer 42. Receiving apparatus 41 receives two streams, and places one stream in the front, and one in the back of data buffer 43.

For that matter the method according to the invention can for instance be used in GSM or other cordless telephony. A conversation or a data stream can then be divided into packets which, in accordance with the method according to the invention, can be sent. Use can then also be made of the avaiiable bandwidth: each data stream can be sent over another band, so that optimal use is made of the available bandwidth.
It is to be understood that the above description is included to illustrate the operation of the preferred embodiments and is not meant to limit the scope of the invention.

Claims (44)

Claims
1. A method of transmitting digital data, wherein a packet of digital data comprises a plurality of sub-packets, said packet of digital data having a length, a front end and a rear, the plurality of sub-packets are simultaneously sent in an order from front to rear of the packet and from rear to front of the packet.
2. The method according to claim 1, wherein a first device sends the data from front to rear to a third device, and a second device sends the same data from rear to front to the third device.
3. The method according to claim 2, wherein the third device places the data in a data buffer the size of the packet, and either sends a signal to the first and second device when the buffer is full, or keeps sending confirmations until the buffer is full.
4. The method according to claim 1, wherein a first device sends data from front to rear to a second device, and simultaneously from rear to front to a third device.
5. The method according to claim 4, wherein the second device and third device immediately at receipt forward the data they received from the first device to each other.
6. The method according to claim 5, wherein the second and third device have been provided with a data buffer the size of the packet, wherein the received data are placed in the data buffer and the first and second device send a signal to the first device when the respective data buffer is full.
7. A method of transmitting digital data, wherein a packet of digital data having a length, a beginning and an end, is simultaneously sent from the beginning of the packet towards the end and from the end towards the beginning.
8. The method according to claim 7, wherein a first device sends the data from beginning towards the end to a third device, and a second device sends the same data from the end towards the beginning to the third device.
9. The method according to claim 8, wherein the third device places the data in a data buffer the size of the packet, and either sends a signal to the first and second device when the buffer is full, or keeps sending confirmations until the buffer is full.
10. The method according to claim 7, wherein a first device sends data from the beginning to the end to a second device, and simultaneously from end to beginning to a third device.
11. The method according to claim 10, wherein the second device and third device immediately at receipt forward the data they received from the first device to each other.
12. The method according to claim 11, wherein the second and third device have been provided with a data buffer the size of the packet, wherein the received data are placed in the data buffer and the first and second device send a signal to the first device when the respective data buffer is full.
13. A method of transmitting digital data, wherein simultaneously a packet of digital data is sent forwards by electronical or optical means and the same packet of digital data is sent backwards by electronical or optical means.
14. The method according to claim 13, wherein a first device sends the packet of digital data forwards to a third device, and a second device sends the same data backwards to the third device.
15. The method according to claim 14, wherein the third device places the data in a data buffer the size of the packet of digital data, and either sends a signal to the first and second device when the buffer is full, or keeps sending confirmations until the buffer is full.
16. The method according to claim 13, wherein a first device sends data forwards to a second device, and simultaneously backwards to a third device.
17. The method according to claim 16, wherein the second device and third device immediately at receipt forward the data they received from the first device to each other.
18. The method according to claim 17, wherein the second and third device have been provided with a data buffer the size of the packet, wherein the received data are placed in the data buffer and the first and second device send a signal to the first device when the respective data buffer is full.
19. A method for sending a data packet to a first device in an ad-hoc data network of devices, comprising:
providing the devices with a data processing unit, a data buffer and software having receiving routines for receiving data packets from at least two transmitting devices in the data network;
simultaneously sending data sub-packets from at least two other devices in the network to the first device, the sent data sub-packets together making up said data packet, wherein at least one device starts sending the data sub-packets with the front sub-packet and sequentially taking the next sub-packet, and at least one device starts sending the data sub-packets with the last sub-packet and sequentially taking a previous one, wherein the first device combines these data sub-packets to form said data packet.
20. The method according to claim 19, wherein the software has further been provided with transmission routines for transmitting data packets, received from the transmitting device or devices in the data network to at least one receiving device that is connected to the data network, independent of the transmitting device or devices.
21. A method for receiving digital data, comprising:
creating a data buffer in a data storage means of a device, the data buffer being the size of a packet of digital data; and simultaneously receiving a first stream of digital data and receiving a second stream of digital data, wherein the data buffer is filled from front to rear with the first stream of digital data and the data buffer is filled from rear to front with the second stream of digital data, wherein said first and second streams make up a single packet, and said first stream is sent from the beginning of the packet towards the end, and said second stream is sent from the end of the packet towards the beginning.
22. The method according to claim 21, further comprising informing the source or sources of the streams of digital data when the data buffer is full.
23. A method for sending digital data, comprising:
creating a data buffer in a data storage means of a device;
storing digital data in the data buffer; and sending the digital data in two streams from the front of the data buffer and the rear of the data buffer;
wherein a first stream is created from the digital data from front to rear of the data buffer, and a second stream is created from the digital data from rear to front of the data buffer.
24. The method according to claim 23, further comprising ceasing sending after receipt of a signal.
25. A computer program product comprising:
a memory having computer readable code embodied therein, for execution by a CPU, for sending a packet of digital data, said code comprising:
first transmission code means for sending a first stream of digital data starting from the front of the packet of digital data; and second transmission code means for sending a second stream of digital data starting from the end of the packet of digital data, wherein said first stream and said second stream are included in said packet.
26. A computer program product comprising:
a memory having computer readable code embodied therein, for execution by a CPU, for receiving a packet of digital data, said code comprising:
first receiving code means for receiving a first stream of digital data;
second receiving code means for simultaneously receiving a second stream of digital data;
first storing code means for storing the first stream of digital data in a memory starting at the front of the memory and filling the memory towards the end;
second storing code means for storing the second stream of digital data starting at the end of the memory and filling the memory towards the front; and stop code means for ending the receiving of digital data when the memory is full, wherein said first and second streams make up a single packet comprising a plurality of sub-packets and said first stream sends the plurality of sub-packets from front to rear of the single packet, and said second stream sends the plurality of sub-packets from rear to front of the single packet.
27. An apparatus for sending a packet of digital data, comprising a memory buffer for storing the packet of digital data, first sending means for sending a first stream of digital data, starting at the front of the memory buffer and second sending means for sending a second stream of digital data, starting at the end of the memory buffer.
28. An apparatus for receiving a packet of digital data, comprising a memory buffer for storing the packet of digital data, first receiving means for receiving a first stream of digital data, and storing it in said memory buffer, starting from the front of the memory buffer, and second receiving means for receiving a second stream of digital data, and storing it in said memory buffer, starting from the back of the memory buffer, wherein said first and second streams make up a single packet comprising a plurality of sub-packets, and said first stream sends a plurality of sub-packets from front to rear of the single packet, and said second stream sends the plurality of sub-packets from rear to front of the single packet.
29. A method of transmitting digital data, including a packet of digital data comprising a plurality of sub-packets the packet having a length, a front and a rear, said packet having a first stream and a second stream, comprising:
sending said first and second streams simultaneously, said first stream sends the plurality of sub-packets from said front to rear of the packet and said second stream sends the plurality of sub-packets from said rear to front of the packet, where one of said first stream and said second stream is continued to be sent if one of said first and second streams fails or is stalled, sending a second packet, using said second packet to validate said first packet.
30. A method for transmitting or receiving a sequence of n items of digital data, characterized in that said items of digital data are transmitted, respectively received, in the order from 1 to n and simultaneously in the order from n to 1.
31. The method according to claim 30, wherein a first device transmits the data in the order from 1 to n to a third device, and a second device transmits the same data in the order from n to 1 to the third device.
32. The method according to claim 31, wherein the sequence of items is a packet and the third device places the data in a data buffer the size of the packet, and sends a signal to the first and second devices when either the buffer is full, or stops sending confirmations until the buffer is full.
33. The method according to claim 31, wherein the sequence of items is a packet and the third device places the data in a data buffer the size of the packet, and sends a signal to the first and second devices when either the buffer is full, or stops sending confirmations until the buffer is full, sends data from 1 to n to a second device, and simultaneously from n to 1 to a third device.
34. The method according to claim 33, wherein the second device and third device forward the data they received from the first device to each other.
35. The method according to claim 34, wherein the sequence of items is a packet and the second and third devices have each been provided with a data buffer the size of the packet, wherein the received data are placed in the data buffer and the second and third devices send a signal to the first device when the respective data buffer is full.
36. A method for transmitting digital data to a first device in an ad-hoc data network of devices using the method of claim 30, characterized in that the devices have been provided with a data processing unit, a data buffer and software having receiving routines for receiving data from at least two transmitting devices in the data network, wherein at least two other devices in the network simultaneously transmit data together making up said digital data at least one device transmitting in the order from 1 to n, and at least one device with transmitting in the order n to 1, to said first device, which first device merges these data to form said digital data.
37. The method according to claim 36, wherein the software has further been provided with transmission routines for transmitting data, received from the transmitting device or devices in the data network to at least one receiving device that is connected to the data network, independent of the transmitting device or devices.
38. A method for receiving digital data according to claim 30, characterized in that a device provided with data storage means defines a data buffer in the data storage means, said data buffer having the size of n items of digital data, and simultaneously receives a first stream of digital data and a second stream of digital data, wherein the device fills the data buffer from 1 to n with the first stream of digital data and fills the data buffer from n to 1 with the second stream of digital data.
39. The method according to claim 38, wherein the device notifies the source or sources of the streams of digital data when the data buffer is full.
40. A method for sending digital data according to claim 30, characterized in that a device provided with data storage means defines a data buffer in the data storage means, stores digital data in the data buffer, and from the front of the data buffer and the rear of the data buffer sends the digital data in two streams.
41. The method according to claim 40, wherein the device stops sending after receipt of a signal or when all the data in the data buffer has been sent.
42. The method of claim 30, characterized in that said items transmitted in the order 1 to n and said items transmitted in the in the order n to 1 are transmitted via different transmission channels including different bands.
43. An apparatus for transmitting digital data using the method of claim 30, characterized in that said apparatus comprises memory means for storing the digital data, first sending means for sending a first stream of digital data in the order from 1 to n and second sending means for sending a second stream of digital data in the order from n to 1.
44. An apparatus for receiving digital data, transmitted using the method of claim 30, characterized in that said apparatus comprises:
memory means for storing the n items of digital data, having positions 1 to n;
first receiving means for receiving a first stream of digital data being transmitted in the order 1 to n and storing it in said memory means, starting on position 1 of the memory means; and second receiving means for receiving a second stream of digital data being transmitted in the order n to 1 and storing it in said memory means, starting on position n of the memory means.
CA002444344A 2001-04-18 2002-04-18 Method for inverse multiplexing Expired - Fee Related CA2444344C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1017870 2001-04-18
NL1017870A NL1017870C2 (en) 2001-04-18 2001-04-18 Method for inverse multiplexing.
PCT/NL2002/000253 WO2002084933A2 (en) 2001-04-18 2002-04-18 Method for inverse multiplexing

Publications (2)

Publication Number Publication Date
CA2444344A1 CA2444344A1 (en) 2002-10-24
CA2444344C true CA2444344C (en) 2009-12-29

Family

ID=19773256

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002444344A Expired - Fee Related CA2444344C (en) 2001-04-18 2002-04-18 Method for inverse multiplexing

Country Status (18)

Country Link
US (3) US6687263B2 (en)
EP (1) EP1380145B1 (en)
JP (2) JP4591993B2 (en)
KR (1) KR100631769B1 (en)
CN (1) CN100589461C (en)
AT (1) ATE339833T1 (en)
AU (1) AU2002307631B2 (en)
BR (1) BR0209049A (en)
CA (1) CA2444344C (en)
DE (1) DE60214691T2 (en)
DK (1) DK1380145T3 (en)
EA (1) EA005969B1 (en)
ES (1) ES2274083T3 (en)
IL (2) IL158438A0 (en)
MX (1) MXPA03009534A (en)
NL (1) NL1017870C2 (en)
PT (1) PT1380145E (en)
WO (1) WO2002084933A2 (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017870C2 (en) 2001-04-18 2002-10-25 Marc Van Oldenborgh Method for inverse multiplexing.
NL1018463C2 (en) 2001-07-04 2003-01-08 Marc Van Oldenborgh Method, layout and software for digitally inverse multiplexing.
KR100460758B1 (en) * 2001-12-31 2004-12-09 매그나칩 반도체 유한회사 Method for packing and unpacking variable length code
US7152464B2 (en) * 2004-10-29 2006-12-26 Spx Corporation Belt tensioning apparatus and method for alternator testing
US7336462B2 (en) * 2004-10-29 2008-02-26 Spx Corporation Alternator and starter tester protection apparatus and method
US7690573B2 (en) * 2006-07-27 2010-04-06 Spx Corporation Alternator and starter tester with bar code functionality and method
US7212911B2 (en) * 2004-10-29 2007-05-01 Spx Corporation Alternator and starter tester apparatus and method
US7134324B2 (en) * 2004-10-29 2006-11-14 Spx Corporation Alternator holding apparatus and method for alternator testing
US7134325B2 (en) 2004-10-29 2006-11-14 Spx Corporation Starter motor holding apparatus and method for starter motor testing
US7150186B2 (en) * 2004-10-29 2006-12-19 Spx Corporation Door interlock apparatus and method for alternator/starter bench testing device
US7300041B2 (en) * 2004-10-29 2007-11-27 Spx Corporation Vertical alternator holding apparatus and method for alternator testing
US7583178B2 (en) * 2005-03-16 2009-09-01 Datalogic Mobile, Inc. System and method for RFID reader operation
US7498806B2 (en) * 2005-06-20 2009-03-03 Spx Corporation Apparatus and method for isolating noise from a signal
KR101213155B1 (en) * 2006-08-21 2012-12-17 삼성전자주식회사 Method of controlling data transmission in a wireless relay system, and the relay system implementing the method
KR100829221B1 (en) 2007-01-26 2008-05-14 삼성전자주식회사 Method of controlling data transmission mode in an orthogonal frequency division multeplexing wireless relay system, and aparatus using the same
US8165292B2 (en) * 2008-10-14 2012-04-24 Nagra France Method and system for secure distribution of audiovisual data encapsulated according to a plurality of transport protocols
WO2011096928A1 (en) * 2010-02-05 2011-08-11 Catch the Wind, Inc. High-density wind velocity data collection for wind turbine
US10055711B2 (en) 2012-02-22 2018-08-21 Bosch Automotive Service Solutions Inc. Alternator and starter tester with warranty code functionality and method
US9128156B2 (en) 2012-05-03 2015-09-08 Bosch Automotive Service Solutions Inc. Alternator and starter tester with other failures determination functionality and method
US8903595B2 (en) 2012-09-17 2014-12-02 Bosch Automotive Service Solutions Llc Alternator and starter tester with increased load and cable identification
US9797956B2 (en) 2015-11-24 2017-10-24 Bosch Automotive Service Solutions Inc. System and method for testing alternator default mode operation
US10193413B2 (en) 2015-12-15 2019-01-29 Bosch Automotive Service Solutions Inc. Mounting bracket for water cooled type alternator

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2229832B (en) 1989-03-30 1993-04-07 Intel Corp Byte swap instruction for memory format conversion within a microprocessor
JPH0342940A (en) 1989-07-11 1991-02-25 Mitsubishi Electric Corp Atm switching device
JPH0575651A (en) * 1991-09-13 1993-03-26 Nec Corp Packet transmission system
DE69326935T2 (en) 1993-03-02 2000-05-18 Ibm Method and device for the transmission of a data stream with high bit repetition frequency via independent digital communication channels
US5799018A (en) * 1994-05-19 1998-08-25 Nippon Telegraph And Telephone Corp. Method and system for private communication with efficient use of bus type transmission path
EP0695088B1 (en) * 1994-07-29 2000-05-10 Sharp Kabushiki Kaisha Video storage type communication device
US5668923A (en) 1995-02-28 1997-09-16 Motorola, Inc. Voice messaging system and method making efficient use of orthogonal modulation components
US6041295A (en) 1995-04-10 2000-03-21 Corporate Computer Systems Comparing CODEC input/output to adjust psycho-acoustic parameters
US5570356A (en) * 1995-06-07 1996-10-29 International Business Machines Corporation High bandwidth communications system having multiple serial links
JPH0964913A (en) 1995-08-24 1997-03-07 Chokosoku Network Computer Gijutsu Kenkyusho:Kk Data guarateeing method for packet communication
US6415398B1 (en) 1995-09-29 2002-07-02 Kabushiki Kaisha Toshiba Coding system and decoding system
US5819117A (en) 1995-10-10 1998-10-06 Microunity Systems Engineering, Inc. Method and system for facilitating byte ordering interfacing of a computer system
GB2310106B (en) * 1996-02-12 2000-07-05 Northern Telecom Ltd Communications in a distribution network
EP0920784B1 (en) * 1996-08-16 2008-01-23 Nortel Networks Limited Inverse multiplexing of digital data
US6665733B1 (en) 1996-12-30 2003-12-16 Hewlett-Packard Development Company, L.P. Network communication device including bonded ports for increased bandwidth
US6198749B1 (en) 1997-04-03 2001-03-06 Nortel Networks Limited System for inverse multiplexing analog channels
US6078565A (en) * 1997-06-20 2000-06-20 Digital Equipment Corporation Method and apparatus to expand an on chip FIFO into local memory
US6160808A (en) 1997-12-18 2000-12-12 3Com Corporation Technique for transmitting incoming multi-link point-to-point (PPP) packet traffic over multiple outgoing links in a multi-link bundle
JPH11225161A (en) 1998-02-05 1999-08-17 Matsushita Electric Ind Co Ltd Data processing method and its device
US6275503B1 (en) * 1998-07-24 2001-08-14 Honeywell International Inc. Method for transmitting large information packets over networks
DE19841531B4 (en) 1998-09-10 2011-07-28 T-Mobile Deutschland GmbH, 53227 Method for the optimized transmission of multimedia services in mobile communication networks (mobile radio networks)
IT1307016B1 (en) * 1999-01-27 2001-10-11 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE TRANSMISSION OF NUMERICAL SIGNALS.
US6220267B1 (en) * 1999-01-27 2001-04-24 Ceramatec, Inc. Apparatus and method for controllably delivering fluid to a second fluid stream
JP2000269999A (en) 1999-03-19 2000-09-29 Fujitsu Ltd Inter-network communication system
JP4276698B2 (en) 1999-04-20 2009-06-10 富士通株式会社 Data communication system and recording medium
AU5369400A (en) 1999-10-05 2001-04-12 Alcatel Traffic allocation on virtual trunks
US6775305B1 (en) * 1999-10-21 2004-08-10 Globespanvirata, Inc. System and method for combining multiple physical layer transport links
US6876669B2 (en) * 2001-01-08 2005-04-05 Corrigent Systems Ltd. Packet fragmentation with nested interruptions
US6707864B2 (en) * 2001-01-25 2004-03-16 Interdigital Technology Corporation Simplified block linear equalizer with block space time transmit diversity
GB2371947B (en) * 2001-02-01 2005-02-23 Fujitsu Ltd Communications systems
NL1017870C2 (en) 2001-04-18 2002-10-25 Marc Van Oldenborgh Method for inverse multiplexing.
NL1018463C2 (en) 2001-07-04 2003-01-08 Marc Van Oldenborgh Method, layout and software for digitally inverse multiplexing.

Also Published As

Publication number Publication date
ES2274083T3 (en) 2007-05-16
US20100220746A1 (en) 2010-09-02
WO2002084933A2 (en) 2002-10-24
CN1531807A (en) 2004-09-22
CN100589461C (en) 2010-02-10
IL158438A0 (en) 2004-05-12
CA2444344A1 (en) 2002-10-24
NL1017870C2 (en) 2002-10-25
DK1380145T3 (en) 2007-01-22
US7738513B2 (en) 2010-06-15
DE60214691D1 (en) 2006-10-26
WO2002084933A3 (en) 2003-01-09
US7995624B2 (en) 2011-08-09
MXPA03009534A (en) 2004-12-06
ATE339833T1 (en) 2006-10-15
AU2002307631A2 (en) 2002-10-28
US20020172233A1 (en) 2002-11-21
JP2005501441A (en) 2005-01-13
EP1380145B1 (en) 2006-09-13
KR100631769B1 (en) 2006-10-11
JP4591993B2 (en) 2010-12-01
EA005969B1 (en) 2005-08-25
JP2008289195A (en) 2008-11-27
EP1380145A2 (en) 2004-01-14
PT1380145E (en) 2007-01-31
KR20030086623A (en) 2003-11-10
AU2002307631B2 (en) 2006-03-09
EA200301132A1 (en) 2004-02-26
DE60214691T2 (en) 2007-09-13
IL158438A (en) 2011-03-31
US20040114639A1 (en) 2004-06-17
JP4809405B2 (en) 2011-11-09
BR0209049A (en) 2004-08-10
US6687263B2 (en) 2004-02-03

Similar Documents

Publication Publication Date Title
CA2444344C (en) Method for inverse multiplexing
AU2002307631A1 (en) Method for inverse multiplexing
US7778554B2 (en) System and method for transmitting data on return path of a cable television system
MXPA03005691A (en) Delivering video over an atm/dsl network using a multi-layered video coding system.
JP2005501441A5 (en)
US7529190B2 (en) Method, device and software for digital inverse multiplexing
AU2002318050A1 (en) Dispersity coding for inverse multiplexing
AU650969B2 (en) Bidirectional data transmission
KR20080013652A (en) Method for transferring audio data without disconnection in a wireless audio system
JP2007074419A (en) Data splitting device, data coupling device, transmitting/receiving system, data splitting method and data coupling method
GB2377337A (en) Buffering in packet-TDM systems

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20160418