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WO1999059293A1 - Data transfer method with varying packet transmission time interval security protocol - Google Patents

Data transfer method with varying packet transmission time interval security protocol Download PDF

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Publication number
WO1999059293A1
WO1999059293A1 PCT/SE1999/000686 SE9900686W WO9959293A1 WO 1999059293 A1 WO1999059293 A1 WO 1999059293A1 SE 9900686 W SE9900686 W SE 9900686W WO 9959293 A1 WO9959293 A1 WO 9959293A1
Authority
WO
WIPO (PCT)
Prior art keywords
message
packets
message packets
communications
time interval
Prior art date
Application number
PCT/SE1999/000686
Other languages
French (fr)
Inventor
Louis Malette
Jacques Bugnon
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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 Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU44019/99A priority Critical patent/AU4401999A/en
Priority to BR9910423-7A priority patent/BR9910423A/en
Priority to GB0026379A priority patent/GB2353683A/en
Priority to CA002331612A priority patent/CA2331612A1/en
Publication of WO1999059293A1 publication Critical patent/WO1999059293A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0457—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply dynamic encryption, e.g. stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/12—Detection or prevention of fraud
    • H04W12/121—Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS]
    • H04W12/122—Counter-measures against attacks; Protection against rogue devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
    • H04L63/1441—Countermeasures against malicious traffic
    • H04L63/1466—Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/18—Network architectures or network communication protocols for network security using different networks or channels, e.g. using out of band channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC

Definitions

  • the present invention relates to a method and system for providing secure communications and, in particular, to a method and system for splitting a sensitive message to be communicated into plural packets (perhaps having variable lengths) and then transmitting the individual packets from a source to a destination with a selected varying time interval between successive packets.
  • a message to be communicated over an unsecure communications link is fragmented into a plurality of packets. These individual packets may, if desired, have varying lengths.
  • a transmitter module then individually transmits the packets over the unsecure communications link. The transmissions of the individual packets are made by the module in such a fashion as to introduce a varying (perhaps, randomly or pseudo-randomly) selected inter-packet time interval (delay) between successive packets.
  • the transmitted packets are received and reassembled to regenerate the original message.
  • This protocol for non-timely transmission of the individual message packets serves to make it more difficult for an eavesdropper to capture all of the message packets and reconstruct the transmitted message.
  • Enhanced security is provided by not only transmitting the packets in a non-timely manner, but also by either sending the packets over different transmission paths supported by the communications link or disordering the packets in a random or pseudo random manner prior to transmission.
  • FIGURE 1 is a block diagram of a communications system implementing a security protocol in accordance with the present invention
  • FIGURE 2 is a flow diagram illustrating a method of operation concerning the security protocol of the present invention.
  • FIGURE 1 a block diagram of a communications system 10 implementing a security protocol in accordance with the present invention.
  • the communications system 10 includes an origination node
  • the origination node 12 includes a source 18 for generating message traffic.
  • the source 18 generated messages are then handled by a transmitter module 20 for transmission over the communications link 16 towards the destination node 14.
  • a receiver module 22 in the destination node 14 receives the transmitted messages, and outputs the messages to a message sink 24.
  • the transmitter module 20 includes a first functionality 26 for taking a message received from the source 18 and fragmenting the message into a plurality of individual packets. The fragmenting process may, if desired, generate individual packets of varying, rather than consistent, lengths. The transmitter module 20 then utilizes a second functionality 28 for transmitting the generated individual packets in a non-timely fashion.
  • non-timely it is meant that the individual packets are transmitted by the transmitter module 20 over the communications link 16 with a varying inter-packet time interval (delay) between successive packets in the source originated message. This introduced delay between packets may be of either a randomly or pseudo randomly selected duration.
  • the introduced varying inter-packet time delay serves to enhance the security of packet transmission over the communications link 16 as a potential eavesdropper does not know when each of the successive packets comprising the complete message are to be transmitted. Delays may be selectively chosen (from packet to packet) in a variable range from as short as - 3 -
  • the third functionality 30 further introduces a random or pseudo random disordering of the message packets prior to non-timely transmission over the communications link 16.
  • the fourth functionality 32 further introduces the transmission of the individual packets over different ones of a plurality of communications paths 34 supported by the communications link 16.
  • the paths 34 may comprise different logical or physical channels within the communications link 16.
  • the receiver module 22 includes a message reassembly functionality 36 for receiving the non-timely transmitted packets (perhaps in either or both a disordered manner and/or from different paths 34), and then coordinating the reconstruction of the original message as generated by the source 18. The reconstructed message is then output by the functionality 36 to the sink 24 for further processing and handling.
  • the functionality 36 includes appropriate memory (not shown) for temporarily caching received message packets prior to processing and completion of the message reconstruction action.
  • the system 10 comprises a telecommunications system
  • the origination node 12 sends a message on behalf of a user (such as a user mobile station)
  • the destination node 14 comprises a network communications node (such as a mobile switching center or home location register)
  • the communications link 16 comprises a signaling network of the telecommunications system.
  • the message being communicated in a fragmented, non-timely manner may comprises sensitive telecommunications information such as authentication data.
  • the secure transmission protocol of the present invention accordingly provides a level of defense against the interception of this sensitive mobile station information and possible cloning of the mobile station.
  • step 100 a message is originated for transmission.
  • step 102 that originated message is fragmenting into a plurality of individual packets.
  • the fragmenting process of step 102 may, if desired, generate individual packets of - 4 -
  • step 104 the generated individual packets are optionally disordered in either a random or a pseudo random manner.
  • the generated individual packets are then transmitted in step 106 in a non-timely fashion such that there is introduced between the transmission of individual packets a randomly or pseudo randomly varying inter-packet time interval (delay).
  • the non- timely transmission of step 106 may further involve selectively transmitting the individual packets over different ones of a plurality of communications paths (such as plural physical or logical channels).
  • step 108 the non- timely transmitted packets are received. Reassembly of the packets back into the original message occurs in step 110. This step of reassembly in step 110 accounts not only for the introduced inter- packet time delay, but also for any optionally introduced variance in packet size, packet disordering or differences in transmission path.
  • the regenerated message is then output in step 112.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A message to be communicated over an unsecure communications link (16) is fragmented (26) into a plurality of packets (each of perhaps varying length). The packets are then individually transmitted (20) over the unsecure communications link with an introduced varying (perhaps, randomly or pseudo-randomly) selected inter-packet time interval (delay). Received packets are then reassembled (36) to regenerate the original message. To provide enhanced security against eavesdropping, the packets are not only transmitted in a non-timely manner (28) with the inter-packet time delay, but are also either routed (32) over different transmission paths (34) supported by the communications link or disordered (30) in a random or pseudo-random manner prior to transmission.

Description

- 1 -
DATA TRANSFER METHOD WITH VARYING
PACKET TRANSMISSION TIME INTERVAL
SECURITY PROTOCOL
BACKGROUND OF THE INVENTION
Technical Field of the Invention
The present invention relates to a method and system for providing secure communications and, in particular, to a method and system for splitting a sensitive message to be communicated into plural packets (perhaps having variable lengths) and then transmitting the individual packets from a source to a destination with a selected varying time interval between successive packets.
Description of Related Art
More and more frequently, users have a need to communicate sensitive information over unsecure communications links. Many sophisticated scrambling and encrypting techniques have been developed to support secure communications efforts in such environments. These sophisticated techniques are often times quite complex procedures. There may also be sizeable monetary expense associated with the implementation of these techniques. In many instances, such sophisticated techniques provide an "over-engineered" and too expensive solution to the concern of deterring eavesdropping. What is needed is a more suitable solution (from both a complexity and expense perspective) that provides some deterrence protection against third party eavesdropping on communications messages transmitted over unsecure communications links.
SUMMARY OF THE INVENTION
A message to be communicated over an unsecure communications link is fragmented into a plurality of packets. These individual packets may, if desired, have varying lengths. A transmitter module then individually transmits the packets over the unsecure communications link. The transmissions of the individual packets are made by the module in such a fashion as to introduce a varying (perhaps, randomly or pseudo-randomly) selected inter-packet time interval (delay) between successive packets. At a receiver module, the transmitted packets are received and reassembled to regenerate the original message. This protocol for non-timely transmission of the individual message packets serves to make it more difficult for an eavesdropper to capture all of the message packets and reconstruct the transmitted message. Enhanced security is provided by not only transmitting the packets in a non-timely manner, but also by either sending the packets over different transmission paths supported by the communications link or disordering the packets in a random or pseudo random manner prior to transmission.
BRIEF DESCRIPTION OF THE DRAWINGS A more complete understanding of the method and apparatus of the present invention may be acquired by reference to the following Detailed Description when taken in conjunction with the accompanying Drawings wherein:
FIGURE 1 is a block diagram of a communications system implementing a security protocol in accordance with the present invention; and FIGURE 2 is a flow diagram illustrating a method of operation concerning the security protocol of the present invention.
DETAILED DESCRIPTION OF THE DRAWINGS
Reference is now made to FIGURE 1 wherein there is shown a block diagram of a communications system 10 implementing a security protocol in accordance with the present invention. The communications system 10 includes an origination node
12 and a destination node 14 interconnected for communication by a communications link 16. The origination node 12 includes a source 18 for generating message traffic. The source 18 generated messages are then handled by a transmitter module 20 for transmission over the communications link 16 towards the destination node 14. A receiver module 22 in the destination node 14 receives the transmitted messages, and outputs the messages to a message sink 24.
The transmitter module 20 includes a first functionality 26 for taking a message received from the source 18 and fragmenting the message into a plurality of individual packets. The fragmenting process may, if desired, generate individual packets of varying, rather than consistent, lengths. The transmitter module 20 then utilizes a second functionality 28 for transmitting the generated individual packets in a non-timely fashion. By "non-timely" it is meant that the individual packets are transmitted by the transmitter module 20 over the communications link 16 with a varying inter-packet time interval (delay) between successive packets in the source originated message. This introduced delay between packets may be of either a randomly or pseudo randomly selected duration. The introduced varying inter-packet time delay serves to enhance the security of packet transmission over the communications link 16 as a potential eavesdropper does not know when each of the successive packets comprising the complete message are to be transmitted. Delays may be selectively chosen (from packet to packet) in a variable range from as short as - 3 -
a few milliseconds to as long as a few minutes. Even longer delays (on the order of hours or days) providing for even more secure message communication may be specified and implemented by the functionality 28 for use in situations where communication of the original message is not time-sensitive in nature. To provide for even more secure message communication, a third and a fourth functionality, 30 and
32, respectively, are selectively implemented in conjunction with the non-timely transmission functionality 28. The third functionality 30 further introduces a random or pseudo random disordering of the message packets prior to non-timely transmission over the communications link 16. The fourth functionality 32 further introduces the transmission of the individual packets over different ones of a plurality of communications paths 34 supported by the communications link 16. In this regard, the paths 34 may comprise different logical or physical channels within the communications link 16.
The receiver module 22 includes a message reassembly functionality 36 for receiving the non-timely transmitted packets (perhaps in either or both a disordered manner and/or from different paths 34), and then coordinating the reconstruction of the original message as generated by the source 18. The reconstructed message is then output by the functionality 36 to the sink 24 for further processing and handling. The functionality 36 includes appropriate memory (not shown) for temporarily caching received message packets prior to processing and completion of the message reconstruction action.
In a specific implementation of the present invention, the system 10 comprises a telecommunications system, the origination node 12 sends a message on behalf of a user (such as a user mobile station), the destination node 14 comprises a network communications node (such as a mobile switching center or home location register), and the communications link 16 comprises a signaling network of the telecommunications system. In this implementation, the message being communicated in a fragmented, non-timely manner may comprises sensitive telecommunications information such as authentication data. The secure transmission protocol of the present invention accordingly provides a level of defense against the interception of this sensitive mobile station information and possible cloning of the mobile station.
Reference is now made to FIGURE 2 wherein there is shown a flow diagram illustrating a method of operation concerning the security protocol of the present invention. In step 100, a message is originated for transmission. In step 102, that originated message is fragmenting into a plurality of individual packets. The fragmenting process of step 102 may, if desired, generate individual packets of - 4 -
varying, rather than consistent, lengths. Next, in step 104, the generated individual packets are optionally disordered in either a random or a pseudo random manner. The generated individual packets are then transmitted in step 106 in a non-timely fashion such that there is introduced between the transmission of individual packets a randomly or pseudo randomly varying inter-packet time interval (delay). The non- timely transmission of step 106 may further involve selectively transmitting the individual packets over different ones of a plurality of communications paths (such as plural physical or logical channels). In step 108, the non- timely transmitted packets are received. Reassembly of the packets back into the original message occurs in step 110. This step of reassembly in step 110 accounts not only for the introduced inter- packet time delay, but also for any optionally introduced variance in packet size, packet disordering or differences in transmission path. The regenerated message is then output in step 112.
Although preferred embodiments of the method and apparatus of the present invention have been illustrated in the accompanying Drawings and described in the foregoing Detailed Description, it will be understood that the invention is not limited to the embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the spirit of the invention as set forth and defined by the following claims.

Claims

WHAT IS CLAIMED IS:
1. A communications method, comprising the steps of: generating a message to be communicated; fragmenting the generated message into a plurality of message packets; transmitting each of the plurality of message packets comprising the message individually with a varying inter-packet transmission time interval; receiving the individually transmitted message packets; and reassembling the message from the received message packets.
2. The method as in claim 1 wherein the varying inter-packet transmission time interval is randomly or pseudo randomly selected.
3. The method as in claim 1 wherein the step of fragmenting comprises the step of fragmenting the message into a plurality of message packets having variable lengths.
4. The method as in claim 1 further including the step of disordering the plurality of message packets prior to transmission.
5. The method as in claim 4 wherein the step of disordering introduces a random or pseudo random shuffling of the message packets comprising the message.
6. The method as in claim 1 wherein the step of transmitting further includes the step of transmitting the plurality of message packets over different ones of a plurality of communications paths.
7. The method of claim 6 wherein the plurality of communications paths comprise plural physical channels.
8. The method of claim 6 wherein the plurality of communications paths comprise plural logical channels.
9. A communications system, comprising: a communications link; an origination node connected to the communications link and including functionality for fragmenting a message into a plurality of message packets and transmitting each of the plurality of message packets comprising the message individually over the communications link with a varying inter-packet transmission time interval; and a destination node connected to the communications link and receiving the transmitted message packets, the destination node including functionality for reassembling the message from the received message packets.
10. The system as in claim 9 wherein the functionality of the origination node introduces a randomly or pseudo randomly selected varying inter-packet transmission time interval.
11. The system as in claim 9 wherein the functionality of the origination node fragments the message into a plurality of message packets having variable lengths.
12. The system as in claim 9 wherein the functionality of the origination node further disorders the plurality of message packets prior to transmission.
13. The system as in claim 12 wherein the disordering introduces a random or pseudo random shuffling of the message packets comprising the message.
14. The system as in claim 9 wherein the functionality of the origination node for transmitting further transmits the plurality of message packets over different ones of a plurality of communications paths.
15. The system of claim 14 wherein the plurality of communications paths comprise plural physical channels.
16. The system of claim 14 wherein the plurality of communications paths comprise plural logical channels.
17. The system as in claim 9 wherein the system comprises a mobile telecommunications system, the origination node transmits mobile station related sensitive information, the destination node comprises a network communications node, and the communications link comprises a mobile telecommunications signaling network. - 7 -
18. The system of claim 17 wherein the message contains mobile station authentication related information.
PCT/SE1999/000686 1998-05-13 1999-04-27 Data transfer method with varying packet transmission time interval security protocol WO1999059293A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU44019/99A AU4401999A (en) 1998-05-13 1999-04-27 Data transfer method with varying packet transmission time interval security protocol
BR9910423-7A BR9910423A (en) 1998-05-13 1999-04-27 Communications process and system
GB0026379A GB2353683A (en) 1998-05-13 1999-04-27 Data transfer method with varying packet transmission time interval security protocol
CA002331612A CA2331612A1 (en) 1998-05-13 1999-04-27 Data transfer method with varying packet transmission time interval security protocol

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7844798A 1998-05-13 1998-05-13
US09/078,447 1998-05-13

Publications (1)

Publication Number Publication Date
WO1999059293A1 true WO1999059293A1 (en) 1999-11-18

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Country Status (7)

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CN (1) CN1300489A (en)
AR (1) AR015289A1 (en)
AU (1) AU4401999A (en)
BR (1) BR9910423A (en)
CA (1) CA2331612A1 (en)
GB (1) GB2353683A (en)
WO (1) WO1999059293A1 (en)

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GB2362547A (en) * 2000-01-07 2001-11-21 Motorola Inc Method for receiving smscb messages during grps/edge data transfer mode
EP1161040A2 (en) * 2000-05-08 2001-12-05 Mitsubishi Heavy Industries, Ltd. Data transmission over a plurality of lines
DE10214118A1 (en) * 2002-03-28 2003-10-23 Infineon Technologies Ag Circuit arrangement with a transmitter and a receiver
WO2003107562A2 (en) * 2002-06-18 2003-12-24 Reveo, Inc. Burst communications system and method
WO2005011195A2 (en) * 2003-07-24 2005-02-03 Koninklijke Philips Electronics N.V. Wireless network security
KR100557699B1 (en) * 2001-07-21 2006-03-07 (주)와이즈인터네셔날코리아 Image transmission device using local network
US20060106753A1 (en) * 2004-11-17 2006-05-18 Samsung Electro-Mechanics Co., Ltd. Method for discovery reply packet transmission in communication network
WO2009034106A1 (en) * 2007-09-13 2009-03-19 Viaccess Method of securing a data stream
AU2005290963B2 (en) * 2004-08-13 2009-04-23 Nokia Technologies Oy WCDMA uplink HARQ operation during the reconfiguration of the TTI length
US7653393B2 (en) 2004-08-17 2010-01-26 Samsung Electronics Co., Ltd Method and system for forming and transmitting/receiving neighbor base station information in a BWA communication system
KR100943568B1 (en) * 2006-06-16 2010-02-23 엔비디아 코포레이션 Systems and methods for communicating data using multiple types of data connections
CN113939882A (en) * 2018-11-20 2022-01-14 维瑞思健康公司 Wireless charging, positioning and data communication for implantable vascular access devices

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Cited By (24)

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GB2362547A (en) * 2000-01-07 2001-11-21 Motorola Inc Method for receiving smscb messages during grps/edge data transfer mode
CN1315305C (en) * 2000-01-07 2007-05-09 摩托罗拉公司 Method for cellular broudcast message of receiving short message service
EP1161040A2 (en) * 2000-05-08 2001-12-05 Mitsubishi Heavy Industries, Ltd. Data transmission over a plurality of lines
EP1161040A3 (en) * 2000-05-08 2004-05-26 Mitsubishi Heavy Industries, Ltd. Data transmission over a plurality of lines
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KR100557699B1 (en) * 2001-07-21 2006-03-07 (주)와이즈인터네셔날코리아 Image transmission device using local network
DE10214118B4 (en) * 2002-03-28 2007-02-22 Infineon Technologies Ag Circuit arrangement with a transmitter and a receiver
DE10214118A1 (en) * 2002-03-28 2003-10-23 Infineon Technologies Ag Circuit arrangement with a transmitter and a receiver
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WO2003107562A2 (en) * 2002-06-18 2003-12-24 Reveo, Inc. Burst communications system and method
WO2003107562A3 (en) * 2002-06-18 2004-07-29 Reveo Inc Burst communications system and method
WO2005011195A2 (en) * 2003-07-24 2005-02-03 Koninklijke Philips Electronics N.V. Wireless network security
WO2005011195A3 (en) * 2003-07-24 2005-05-19 Koninkl Philips Electronics Nv Wireless network security
AU2005290963B2 (en) * 2004-08-13 2009-04-23 Nokia Technologies Oy WCDMA uplink HARQ operation during the reconfiguration of the TTI length
US7653393B2 (en) 2004-08-17 2010-01-26 Samsung Electronics Co., Ltd Method and system for forming and transmitting/receiving neighbor base station information in a BWA communication system
EP1659759A1 (en) 2004-11-17 2006-05-24 Samsung Electro-Mechanics Co., Ltd. Method for packet transmission in a sensor network
US20060106753A1 (en) * 2004-11-17 2006-05-18 Samsung Electro-Mechanics Co., Ltd. Method for discovery reply packet transmission in communication network
US7660860B2 (en) 2004-11-17 2010-02-09 Samsung Electro-Mechanics Co., Ltd Method for discovery reply packet transmission in communication network
CN1777111B (en) * 2004-11-17 2010-11-24 三星电机株式会社 Method for discovery reply packet transmission in communication network
KR100943568B1 (en) * 2006-06-16 2010-02-23 엔비디아 코포레이션 Systems and methods for communicating data using multiple types of data connections
US8279893B2 (en) 2006-06-16 2012-10-02 Nvidia Corporation System and method for communicating data utilizing multiple types of data connections
WO2009034106A1 (en) * 2007-09-13 2009-03-19 Viaccess Method of securing a data stream
FR2921173A1 (en) * 2007-09-13 2009-03-20 Viaccess Sa METHOD FOR SECURING A DATA STREAM
CN113939882A (en) * 2018-11-20 2022-01-14 维瑞思健康公司 Wireless charging, positioning and data communication for implantable vascular access devices

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Publication number Publication date
BR9910423A (en) 2001-01-09
GB0026379D0 (en) 2000-12-13
AU4401999A (en) 1999-11-29
GB2353683A (en) 2001-02-28
AR015289A1 (en) 2001-04-18
CN1300489A (en) 2001-06-20
CA2331612A1 (en) 1999-11-18

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