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US20080225750A1 - Method of transmitting data in a communication system - Google Patents

Method of transmitting data in a communication system Download PDF

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Publication number
US20080225750A1
US20080225750A1 US12/004,457 US445707A US2008225750A1 US 20080225750 A1 US20080225750 A1 US 20080225750A1 US 445707 A US445707 A US 445707A US 2008225750 A1 US2008225750 A1 US 2008225750A1
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US
United States
Prior art keywords
parameter
communication event
communication
event
stored
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.)
Abandoned
Application number
US12/004,457
Other languages
English (en)
Inventor
Andrei Jefremov
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.)
Skype Ltd Ireland
Original Assignee
Skype Ltd Ireland
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 Skype Ltd Ireland filed Critical Skype Ltd Ireland
Assigned to SKYPE LIMITED reassignment SKYPE LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEFREMOV, ANDREI
Publication of US20080225750A1 publication Critical patent/US20080225750A1/en
Assigned to SKYPE LIMITED reassignment SKYPE LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WURM, KARLHEINZ
Assigned to JPMORGAN CHASE BANK, N.A. reassignment JPMORGAN CHASE BANK, N.A. SECURITY AGREEMENT Assignors: SKYPE LIMITED
Assigned to SKYPE LIMITED reassignment SKYPE LIMITED RELEASE OF SECURITY INTEREST Assignors: JPMORGAN CHASE BANK, N.A.
Assigned to SKYPE reassignment SKYPE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SKYPE LIMITED
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0894—Packet rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/22—Traffic shaping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
    • H04L47/263—Rate modification at the source after receiving feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/38—Flow control; Congestion control by adapting coding or compression rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H04L43/0858—One way delays

Definitions

  • the present invention relates to information processing systems such as communication systems. More particularly the present invention relates to a method and apparatus for receiving and transmitting information in a communication system.
  • a communication network which can link together two communication terminals so that the terminals can send information to each other in a call or other communication event.
  • Information may include speech, text, images or video.
  • Modern communication systems are based on the transmission of digital signals.
  • Analogue information such as speech is input into an analogue to digital converter at the transmitter of one terminal and converted into a digital signal.
  • the digital signal is then encoded and placed in data packets for transmission over a channel to the receiver of another terminal.
  • VoIP Voice over IP
  • Conditions associated with the communication system can affect the quality of the information output at the receiving terminal. For example, degradations in the channel on which the information is sent will affect the information received at the receiving terminal. The degradations may be caused by channel imperfections, noise and overload in the channel. Similarly the resource availability of the communicating terminals, for example CPU (central processing unit) resources will affect how effectively the transmitting and receiving terminals can process information.
  • CPU central processing unit
  • the rate at which data is transmitted may be adjusted in dependence on the available bandwidth of the channel, or on the available CPU resources of the receiving terminal.
  • settings in the terminals are adjusted during the communication.
  • algorithms are used to adjust the settings during a call.
  • the initial value of the settings may either be adapted from a random value, or more commonly a default setting.
  • Adapting the settings during a call in this manner requires time to optimise the settings. Often optimisation of some settings require approximately 100 seconds. As such the initial call quality is poor.
  • a method of establishing parameters to facilitate a communication event in a communication network comprising: establishing a first communication event; monitoring at least one parameter used to process data associated with the first communication event; storing said at least one monitored parameter; establishing a second communication event; selecting at least one stored monitored parameter in response to establishing the second communication event; and applying said at least one selected parameter to process data associated with said second communication event.
  • a method of establishing parameters to facilitate a data transmission event comprising: establishing a first data transmission event; monitoring at least one parameter used to process data associated with the first data transmission event; storing said at least one monitored parameter; establishing a second data transmission event; selecting at least one stored monitored parameter in response to establishing the second data transmission event; and applying said at least one selected parameter to process data associated with said second data transmission event.
  • a device for establishing parameters to facilitate a communication event in a communication network comprising: communication establishing means for establishing a first communication event and a second communication event; monitoring means for monitoring at least one parameter used to process data associated with the first communication event; storage means for storing said at least one monitored parameter; control means for selecting at least one stored monitored parameter in response to the second communication event being established; and for applying said at least one selected parameter to process data associated with said second communication event.
  • FIG. 1 shows a communication network
  • FIG. 2 shows a terminal according to an embodiment of the invention.
  • FIG. 1 shows a terminal 100 and a terminal 112 connected to a communication network 104 .
  • the terminals 100 and 112 are arranged to transmit data to each other via the communication network 104 .
  • the communications network is a VoIP network provided by the internet. It should be appreciated that even though the exemplifying communications system shown and described in more detail herein uses the terminology of a VoIP network, embodiments of the present invention can be used in any other suitable communication system that facilitates the transfer of data.
  • the terminals 100 and 112 may be, for example, a personal computer, a gaming device, a personal digital assistant, a suitably enabled mobile phone, a television or other device able to connect to the network 104 .
  • the terminals may be connected to the network via a wired or wireless connection that employs a particular access technology such as Ethernet, WiFi, WiMax (Worldwide Interoperability for Microwave Access), 3G (third generation),
  • FIG. 2 shows the terminal 100 in detail.
  • the terminal 100 includes receiving circuitry for receiving information transmitted from the network 104 .
  • the receiving circuitry comprises a jitter buffer 10 for buffering data packets received from the network, a decoder 12 for decoding the information received in the data packets and a digital to analogue converter 14 .
  • a renderer block 36 is located between the decoder 12 and the digital to analogue converter and is arranged to handle video data to be output to a display sceen 18 .
  • the receiving circuitry is arranged to output information to various output devices such as a loudspeaker 16 and the display screen 18 .
  • the terminal 100 also includes transmitting circuitry for transmitting information via the network input from input devices such as a microphone 26 and a webcam 28 .
  • the transmitting circuitry comprises an analogue to digital converter 30 for converting analogue information input from the input device into digital information, and an encoder 32 for encoding the digital information before the information is transmitted.
  • the terminal 100 also includes a channel estimation unit 20 , a resource manager block 22 and a call history memory 24 .
  • the channel estimation unit 20 receives an input from the transmitting circuitry and the receiving circuitry.
  • the channel estimation unit 20 is arranged to estimate the conditions of the transmission channel and the receiving channel. These conditions include the available bandwidth and signal propagation delay.
  • the channel estimation unit is also arranged to estimate the resource availability of the destination terminal 112 once the destination terminal 112 has transmitted some information to the terminal 100 from which the resource availability can be estimated.
  • the destination terminal 112 may also transmit other operating information to the terminal 100 such as information on type of access connection that is has to the communication network and on the power supply.
  • the resource manager block 22 is arranged to adjust the settings of the terminal 100 during a call or similar communication event.
  • the components for example the decoder 12 the encoder 32 , the channel estimation unit 20 and the renderer block 36 of the terminal 100 report the communication system conditions to the resource manager block 22 .
  • the channel estimation block 20 may report the available channel bandwidths to the resource manager block 20 .
  • the encoder 32 may report the data rate of the data being inputted for transmission, while the renderer block 36 may report the rate at which it can present video frames to the display screen 18 .
  • the resource manager applies optimization algorithms to the reported communication system conditions to determine optimum settings for the terminal. For example if the bandwidth of the transmission channel is determined to be low the resource manager block 22 may determine that the rate at which data is encoded should be reduced. The encoded data rate calculated by the resource manager block 22 is then output to the encoder 32 . If the conditions of the communication system change during the call the resource manager will adapt the optimum settings accordingly. The determined optimum settings are applied to the relevant components of the terminal.
  • a reported communication system condition may be considered as any condition associated with the communication system, including the terminal 100 , which is reported to the resource manager unit 22 .
  • the available CPU resource for processing incoming data may be reported to the resource manager block as a reported communication system condition.
  • the resource manager block 22 may determine that the CPU available to processes the incoming data should be adjusted, thus the CPU resource may be applied as an optimised setting.
  • the optimised settings are stored in a call history unit 24 provided in the terminal 100 .
  • the call history unit is arranged to store both the optimized settings and the reported communication system conditions for a call.
  • the stored set of optimised settings and communication system conditions may relate to the last call that was made by the terminal.
  • optimised settings and communication system conditions are stored for a plurality of calls or other communication events, wherein each call has its own set of conditions and settings.
  • each set of optimised settings and system conditions may be stored together with further information on the communication event to which they relate.
  • the set of conditions and settings may be stored together with an identifier for the called party.
  • the resource manager 22 selects system conditions and optimised settings from the call history unit 24 to be applied as initial conditions and settings for the call.
  • the resource manager may apply a selection algorithm to retrieve the correct settings from the call history unit 24 .
  • the selection algorithm may allow the selection to be based on call set up conditions that are detected before the call is established.
  • the call set up conditions may include information on the type of communication event to be established.
  • the set up conditions may specify whether the call is to be a voice call or a video call. If the call is to be a video call the algorithm may then select a set of conditions and settings that correspond to a previous video call.
  • the call set up conditions may specify the caller that is being called, using for example the telephone number, or the username of the called party.
  • the selection algorithm may then select a set of conditions and settings that correspond to a previous call with the specified caller.
  • the set of conditions and settings that correspond to a previous call with the caller may be identified using the caller identifier that was stored in association with the conditions and settings during a previous call.
  • the settings and conditions stored for calls to a particular user may indicate that the terminal 112 associated with that user has a particularly slow CPU. This information can be used to initially set a slow data rate for the information transmitted from the calling terminal 100 .
  • the stored conditions may indicate the type of access technology associated with the connection that the called party has to the network and information relating to the power supply used at the called party's terminal 112 .
  • a stored optimised setting or communication values may only be applied when it is determined that the condition or setting is reliable.
  • the reliability of a condition or setting may be determined from the stability of the condition or setting. This may be determined by analysing the trend of a range of values stored for each condition and setting. If the values for a condition or setting are substantially constant over the analysed range the value may be considered constant and that condition or setting may be applied.
  • call set up conditions which indicate the type of communication event or the called party may be used to predict the stability of some of the conditions and settings of a call. For example if the communication event involves the use of an input device which has random CPU requirements setting that relate to the CPU usage may not be applied.
  • the call set up conditions may specify the location of the terminal 100 . If the call set up conditions indicate that the location of the terminal is different, conditions and settings relating to the network conditions may not be applied, since these conditions and settings are likely to change from the optimised settings and conditions for a different location.
  • the call set up conditions may also specify the type of access technology used to connect the terminal 100 to the network. Additionally the call set up conditions may specify if the terminal currently powered by a battery or plugged into the power grid.
  • a stored setting or condition may be retrieved from the call history unit 24 and transmitted to the terminal 112 that the terminal 100 is in communication with at the start of the communication.
  • the terminal 112 that is in communication with the terminal 100 may use the transmitted condition or setting to update its own settings that are affected by the terminal 100 . For example if the terminal 100 transmits a setting to the terminal 112 indicating that the optimised processing speed of the CPU in terminal 100 is high, the terminal 112 may increase the rate that data is transmitted to the terminal 100 .
  • a user of the terminal may select which stored optimised settings and system conditions should be used as initial settings and conditions for a call.
  • the user may be prompted to input this information directly.
  • the user may be prompted with questions that allow the resource manager unit of the terminal to select which settings should be retrieved. For example before the communication is established the user may be prompted with questions relating to the location of the terminal 100 , the location of the terminal 112 that the user is communicating, or information on the type of terminal that the user is communicating with.
  • the resource manager unit if the no previously stored value for a setting or condition exist when a call is established the resource manager unit is arranged to use a random or default value for that setting.
  • the resource manager block 22 is arranged to adjust the initial optimised settings that were retrieved from the call history unit in order to optimise the settings for the current call.
  • the resource manager is arranged to store the newly optimised settings in the call history unit 24 .
  • the resource manager is arranged to use an average value of the values stored for a setting or condition to be applied.
  • the resource manager is arranged to apply the most common value for the setting or condition to be applied.
  • the resource manager is arranged to use the most recent value of the setting or condition to be applied.
  • the resource manager is arranged to apply an algorithm to determine whether to select an average, mode, or most recent value of the setting to be applied.
  • embodiments of the present invention relate to the transfer of other types of data, for example file transfer between terminals.
  • embodiments of the present invention are not limited to data transmission between two user terminals of a communication system.
  • embodiments of the present invention include the transfer of data between network nodes such as servers.
  • FIG. 1 For example, alternative embodiments of the invention relate to the transmission of data between a data receiving device and a data storage device.
  • a video capturing device may implement the present invention in order to apply optimised settings as initial settings.
  • CPU resources, and other conditions may limit the resolution and bit rate for storing video data.
  • a resource manager in the video capturing device may apply the optimised settings generated during a previous video capturing operation as initial settings when a video capturing operation is started.
  • the required processing may be implemented as hardware or by using appropriately adapted software executed on a processor.
  • Software for implementing the invention may be stored on and provided by means of a carrier medium such as a carrier disc, card or tape. A possibility is to download the software via a data network. This is an implementation issue.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)
  • Telephonic Communication Services (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Closed-Circuit Television Systems (AREA)
US12/004,457 2007-03-13 2007-12-20 Method of transmitting data in a communication system Abandoned US20080225750A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0704834.1 2007-03-13
GBGB0704834.1A GB0704834D0 (en) 2007-03-13 2007-03-13 Method of transmitting data in a communication system

Publications (1)

Publication Number Publication Date
US20080225750A1 true US20080225750A1 (en) 2008-09-18

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US12/004,457 Abandoned US20080225750A1 (en) 2007-03-13 2007-12-20 Method of transmitting data in a communication system
US12/075,801 Active 2028-08-05 US7817625B2 (en) 2007-03-13 2008-03-12 Method of transmitting data in a communication system
US12/402,161 Expired - Fee Related US9699099B2 (en) 2007-03-13 2009-03-11 Method of transmitting data in a communication system
US12/887,236 Abandoned US20110122869A1 (en) 2007-03-13 2010-09-21 Method of Transmitting Data in a Communication System

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US12/075,801 Active 2028-08-05 US7817625B2 (en) 2007-03-13 2008-03-12 Method of transmitting data in a communication system
US12/402,161 Expired - Fee Related US9699099B2 (en) 2007-03-13 2009-03-11 Method of transmitting data in a communication system
US12/887,236 Abandoned US20110122869A1 (en) 2007-03-13 2010-09-21 Method of Transmitting Data in a Communication System

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US (4) US20080225750A1 (fr)
EP (2) EP2137883B1 (fr)
JP (1) JP5043132B2 (fr)
CN (1) CN101658000A (fr)
AT (1) ATE501565T1 (fr)
DE (1) DE602007013111D1 (fr)
GB (1) GB0704834D0 (fr)
WO (2) WO2008110871A2 (fr)

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WO2008110871A2 (fr) 2008-09-18
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US20080225844A1 (en) 2008-09-18
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WO2008110871A3 (fr) 2008-11-06
US20110122869A1 (en) 2011-05-26
ATE501565T1 (de) 2011-03-15
US20090234919A1 (en) 2009-09-17
WO2008110930A2 (fr) 2008-09-18
JP2010521856A (ja) 2010-06-24
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GB0704834D0 (en) 2007-04-18
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