Transmitter device and relay device for performing data transmission control

• US 20050165923A1
• Filed: 12/23/2004
• Published: 07/28/2005
• Est. Priority Date: 12/26/2003
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Sekiguchi, Katsumi, Jinguuji, Makoto, Inamura, Hiroshi, Miyake, Motoharu
• Granted Patent: US 7,680,141 B2
• Time in Patent Office: Days
• US Class Current: 709/223
• CPC Class Codes: G01S 1/026 of associated receivers
• CPC Class Codes: G01S 5/021 Calibration, monitoring or correction G01S5/0252 takes precedence
• CPC Class Codes: G01S 5/06 Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements G01S5/12 takes precedence
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1639 the display being based on projection
• CPC Class Codes: G06F 21/305 by remotely controlling device operation
• CPC Class Codes: G06F 21/6209 to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
• CPC Class Codes: G06F 21/74 operating in dual or compartmented mode, i.e. at least one secure mode
• CPC Class Codes: G06F 21/88 Detecting or preventing theft or loss
• CPC Class Codes: G06F 2221/2105 Dual mode as a secondary aspect
• CPC Class Codes: G06F 2221/2115 Third party
• CPC Class Codes: G06F 3/0481 based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
• CPC Class Codes: G11B 20/10009 Improvement or modification of read or write signals
• CPC Class Codes: G11B 20/10425 by counting out-of-lock events of a PLL
• CPC Class Codes: G11B 20/22 for reducing distortions
• CPC Class Codes: H03L 7/091 the phase or frequency detector using a sampling device H03L7/087 takes precedence
• CPC Class Codes: H04B 10/25754 Star network topology
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04B 7/2687 Inter base stations synchronisation
• CPC Class Codes: H04J 13/0077 Multicode, e.g. multiple codes assigned to one user
• CPC Class Codes: H04J 13/16 : Code allocation
• CPC Class Codes: H04J 3/0655 : using timestamps
• CPC Class Codes: H04J 3/0658 : Clock or time synchronisation among packet nodes
• CPC Class Codes: H04L 1/0002 : by adapting the transmission rate
• CPC Class Codes: H04L 1/0015 : characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0066 : Parallel concatenated codes
• CPC Class Codes: H04L 1/0068 : by puncturing
• CPC Class Codes: H04L 1/1685 : the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 1/1841 : Resequencing
• CPC Class Codes: H04L 1/187 : Details of sliding window management
• CPC Class Codes: H04L 12/417 : with deterministic access, e.g. token passing
• CPC Class Codes: H04L 12/4641 : Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 2012/40215 : Controller Area Network CAN
• CPC Class Codes: H04L 2012/40273 : the transportation system being a vehicle
• CPC Class Codes: H04L 25/03038 : with a non-recursive structure H04L25/03031 takes precedence
• CPC Class Codes: H04L 25/4902 : Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 25/4904 : using self-synchronising codes, e.g. split-phase codes
• CPC Class Codes: H04L 25/497 : by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems transversal equalizers at the transmitter end H04L25/03343
• CPC Class Codes: H04L 27/156 : with demodulation using temporal properties of the received signal, e.g. detecting pulse width
• CPC Class Codes: H04L 41/06 : Management of faults, events, alarms or notifications
• CPC Class Codes: H04L 41/5009 : Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
• CPC Class Codes: H04L 41/5087 : wherein the managed service relates to voice services management of VoIP services H04M7/0081
• CPC Class Codes: H04L 43/0829 : Packet loss
• CPC Class Codes: H04L 43/091 : Measuring contribution of individual network components to actual service level
• CPC Class Codes: H04L 43/50 : Testing arrangements
• CPC Class Codes: H04L 45/04 : Interdomain routing, e.g. hierarchical routing
• CPC Class Codes: H04L 45/22 : Alternate routing
• CPC Class Codes: H04L 47/10 : Flow control; Congestion control
• CPC Class Codes: H04L 47/12 : Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/15 : in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/193 : at the transport layer, e.g. TCP related
• CPC Class Codes: H04L 47/27 : Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 47/70 : Admission control; Resource allocation
• CPC Class Codes: H04L 47/72 : using reservation actions during connection setup
• CPC Class Codes: H04L 47/745 : Reaction in network
• CPC Class Codes: H04L 47/765 : triggered by the end-points
• CPC Class Codes: H04L 47/822 : Collecting or measuring resource availability data
• CPC Class Codes: H04L 47/824 : Applicable to portable or mobile terminals
• CPC Class Codes: H04L 51/04 : Real-time or near real-time messaging, e.g. instant messaging [IM]
• CPC Class Codes: H04L 51/48 : Message addressing, e.g. address format or anonymous messages, aliases
• CPC Class Codes: H04L 51/58 : Message adaptation for wireless communication
• CPC Class Codes: H04L 61/2553 : Binding renewal aspects, e.g. using keep-alive messages
• CPC Class Codes: H04L 65/1016 : IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/1043 : Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1101 : Session protocols
• CPC Class Codes: H04L 65/1104 : Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/4061 : Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04L 67/1001 : for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1034 : Reaction to server failures by a load balancer
• CPC Class Codes: H04L 69/16 : Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/163 : In-band adaptation of TCP data exchange; In-band control procedures
• CPC Class Codes: H04L 69/40 : for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04L 9/085 : Secret sharing or secret splitting, e.g. threshold schemes
• CPC Class Codes: H04L 9/304 : based on error correction codes, e.g. McEliece
• CPC Class Codes: H04M 1/724 : User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/72415 : for remote control of appliances
• CPC Class Codes: H04M 3/42221 : Conversation recording systems at the subscriber's set H04M1/656
• CPC Class Codes: H04M 7/0057 : Services where the data services network provides a telephone service in addition or as an alternative, e.g. for backup purposes, to the telephone service provided by the telephone services network
• CPC Class Codes: H04M 7/1295 : Details of dual tone multiple frequency signalling
• CPC Class Codes: H04N 1/00957 : Compiling jobs, e.g. for batch processing H04N1/3208 takes precedence; program code compilation G06F8/41
• CPC Class Codes: H04N 1/32106 : separate from the image data, e.g. in a different computer file
• CPC Class Codes: H04N 1/40 : Picture signal circuits H04N1/387 takes precedence
• CPC Class Codes: H04N 19/109 : among a plurality of temporal predictive coding modes
• CPC Class Codes: H04N 19/139 : Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
• CPC Class Codes: H04N 19/51 : Motion estimation or motion compensation
• CPC Class Codes: H04N 19/517 : by encoding
• CPC Class Codes: H04N 19/527 : Global motion vector estimation
• CPC Class Codes: H04N 19/625 : using discrete cosine transform [DCT]
• CPC Class Codes: H04N 19/70 : characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/91 : Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
• CPC Class Codes: H04N 21/2543 : Billing , e.g. for subscription services payment schemes, architectures or protocols G06Q20/00; e-commerce G06Q30/00; arrangements for billing for the use of broadcast information or broadcast-related information H04H60/21
• CPC Class Codes: H04N 21/4181 : for conditional access
• CPC Class Codes: H04N 21/426 : Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/433 : Content storage operation, e.g. storage operation in response to a pause request, caching operations
• CPC Class Codes: H04N 21/4623 : Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/47211 : for requesting pay-per-view content payment schemes payment architectures or payment protocols G06Q20/00, G07F
• CPC Class Codes: H04N 21/6175 : involving transmission via Internet broadcast-related systems characterised by the transmission system being the Internet H04H60/82
• CPC Class Codes: H04N 21/6187 : involving transmission via a telephone network, e.g. POTS
• CPC Class Codes: H04N 21/6582 : Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number arrangements where receivers interact with the broadcast H04H20/38
• CPC Class Codes: H04N 2201/0094 : Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception
• CPC Class Codes: H04N 2201/3212 : of data relating to a job, e.g. communication, capture or filing of an image
• CPC Class Codes: H04N 2201/3222 : of processing required or performed, e.g. forwarding, urgent or confidential handling
• CPC Class Codes: H04N 2201/3274 : Storage or retrieval of prestored additional information
• CPC Class Codes: H04N 23/57 : Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
• CPC Class Codes: H04N 5/38 : Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 5/4448 : for frame-grabbing
• CPC Class Codes: H04N 5/445 : for displaying additional information H04N5/50 takes precedence
• CPC Class Codes: H04N 5/45 : Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/46 : for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 5/64 : Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• CPC Class Codes: H04N 5/66 : Transforming electric information into light information scanning details H04N3/00
• CPC Class Codes: H04N 5/76 : Television signal recording
• CPC Class Codes: H04N 5/775 : between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/85 : on discs or drums
• CPC Class Codes: H04N 5/907 : using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 7/0112 : one of the standards corresponding to a cinematograph film standard
• CPC Class Codes: H04N 7/0122 : the input and the output signals having different aspect ratios
• CPC Class Codes: H04N 7/163 : by receiver means only
• CPC Class Codes: H04N 7/17327 : with deferred transmission or handling of upstream communications
• CPC Class Codes: H04N 9/3129 : scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161
• CPC Class Codes: H04N 9/642 : Multi-standard receivers
• CPC Class Codes: H04N 9/7925 : for more than one standard
• CPC Class Codes: H04N 9/8042 : involving data reduction
• CPC Class Codes: H04Q 2213/1302 : Relay switches
• CPC Class Codes: H04Q 2213/13039 : Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: H04Q 2213/1304 : Coordinate switches, crossbar, 4/2 with relays, coupling field
• CPC Class Codes: H04Q 2213/13076 : Distributing frame, MDF, cross-connect switch
• CPC Class Codes: H04Q 2213/13095 : PIN / Access code, authentication
• CPC Class Codes: H04Q 2213/13109 : Initializing, personal profile
• CPC Class Codes: H04Q 2213/13298 : Local loop systems, access network
• CPC Class Codes: H04Q 2213/13349 : Network management
• CPC Class Codes: H04Q 3/0025 : Provisions for signalling
• CPC Class Codes: H04Q 3/60 : for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
• CPC Class Codes: H04W 24/00 : Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/00 : Network traffic management; Network resource management
• CPC Class Codes: H04W 28/02 : Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/18 : Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/26 : Resource reservation
• CPC Class Codes: H04W 36/02 : Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 4/10 : Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 4/12 : Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 4/14 : Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
• CPC Class Codes: H04W 40/00 : Communication routing or communication path finding
• CPC Class Codes: H04W 48/08 : Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/0225 : using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0248 : dependent on the time of the day, e.g. according to expected transmission activity
• CPC Class Codes: H04W 52/0274 : by switching on or off the equipment or parts thereof
• CPC Class Codes: H04W 52/30 : using constraints in the total amount of available transmission power
• CPC Class Codes: H04W 56/00 : Synchronisation arrangements
• CPC Class Codes: H04W 64/00 : Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 68/00 : User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/1268 : of uplink data flows
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 74/0816 : with collision avoidance
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/12 : Setup of transport tunnels
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/30 : Connection release
• CPC Class Codes: H04W 76/34 : Selective release of ongoing connections
• CPC Class Codes: H04W 76/45 : for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 8/04 : Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/245 : from a network towards a terminal
• CPC Class Codes: H04W 8/26 : Network addressing or numbering for mobility support
• CPC Class Codes: H04W 8/265 : for initial activation of new user
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/08 : Trunked mobile radio systems
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/085 : Access point devices with remote components
• CPC Class Codes: H04W 88/16 : Gateway arrangements
• CPC Class Codes: Y02D 30/70 : in wireless communication networks
• CPC Class Codes: Y10S 370/906 : Fiber data distribution interface, FDDI
• CPC Class Codes: Y10S 370/907 : Synchronous optical network, SONET
• CPC Class Codes: Y10S 707/99943 : Generating database or data structure, e.g. via user interface

Abstract

A transmitter device which performs window control in transmitting data for transmission through a communication network is caused to identify a mode of window control to be performed based on a communication condition under which the data transmission is performed, so as to transmit the data for transmission by performing the window control in the identified mode.

Claims

1. A transmitter device comprising:

transmission data storing means for storing data for transmission;

control parameter storing means for storing a control parameter in correspondence with a communication condition pertaining to data transmission, said control parameter defining a mode of window control to be performed when transmitting in said communication condition said data for transmission through a communication network to a receiving communication terminal;

first detection means for detecting a communication condition of data transmission under which said data for transmission is to be transmitted prior to initiation of said data transmission;

transmission means for transmitting through said communication network said data for transmission to said receiving communication terminal; and

transmission control means for controlling said transmission means to perform window control in a mode defined by a control parameter identified on the basis of said communication condition detected by said first detection means and a memory content in said control parameter storing means.

2. A transmitter device according to claim 1,

wherein said control parameter is data defining a transmission rate for transmitting said data for transmission to said receiving communication terminal.

3. A transmitter device according to claim 2, further comprising:

second detection means for detecting a load placed on said communication network, and

wherein when a high degree of load is detected by said second detection means, said transmission control means identifies a control parameter defining a transmission rate that is lower than a transmission rate defined by said control parameter corresponding to said communication condition detected by said first detection means.

4. A transmitter device according to claim 1,

wherein said communication condition is defined by a type of said receiving communication terminal;

wherein said first detection means includes receiving means for receiving, through said communication network, a communication message containing a type identifier specifying a type of said receiving communication terminal that has transmitted said communication message; and

wherein said transmission control means identifies said control parameter on the basis of said type identifier contained in said communication message received by said receiving means and said memory content in said control parameter storing means.

5. A transmitter device according to claim 1,

wherein said communication condition is defined by a data amount of said data for transmission;

wherein said first detection means includes receiving means for receiving, through said communication network, a communication message containing information identifying said data for transmission requested to be transmitted to said receiving communication terminal, and obtains a data amount of said data for transmission identified by said information contained in said communication message; and

wherein said transmission control means identifies said control parameter on the basis of said data amount obtained by said first detection means and said memory content in said control parameter storing means.

6. A relay device comprising:

first control parameter storing means for storing a control parameter in correspondence with a communication condition pertaining to data transmission, said control parameter defining a mode of window control to be performed when data for transmission is transmitted in said communication condition through a communication network to a receiving communication terminal;

detection means for detecting a communication condition of data transmission under which said data for transmission is to be transmitted;

identifying means for identifying a control parameter on the basis of said communication condition detected by said detection means and a memory content in said first control parameter storing means;

transfer means for transferring said data for transmission transmitted from a transmitter device to said receiving communication terminal; and

control means for controlling said transmitter device or said transfer means to transmit said data for transmission by performing window control in a mode defined by said control parameter identified by said identifying means.

7. A relay device according to claim 6,

wherein said communication condition is defined by a type of said receiving communication terminal;

wherein said detection means includes receiving means for receiving, through said communication network, a communication message requesting transmission of said data for transmission stored in said transmitter device, said communication message containing a type identifier identifying a type of said receiving communication terminal that has transmitted said communication message;

wherein said identifying means identifies said control parameter on the basis of said type identifier received by said receiving means and said memory content in said first control parameter storing means; and

wherein said control means transfers to said transmitter device said control parameter identified by said identifying means after writing said control parameter in said communication message received by said receiving means.

8. A relay device according to claim 6, further comprising:

second control parameter storing means for storing, for each of at least two transmitter devices storing identical data for transmission to be transmitted to a receiving communication terminal, a control parameter defining a mode of window control to be performed by each of said at least two transmitter devices when transmitting said data for transmission,

wherein said communication condition is defined by a type of said receiving communication terminal;

wherein said detection means includes receiving means for receiving, through said communication network, a communication message requesting transmission of said data for transmission stored in each of said at least two transmitter devices, said communication message containing a type identifier identifying a type of said receiving communication terminal that has transmitted said communication message;

wherein said identifying means identifies said control parameter on the basis of said type identifier received by said receiving means and said memory content in said first control parameter storing means, and also identifies, on the basis of said identified control parameter and a memory content in said second control parameter storing means, a transmitter device, from among said at least two transmitter devices, which is to transmit said data for transmission to said receiving communication terminal; and

wherein said control means transfers said communication message received by said receiving means to said transmitter device identified by said identifying means.

9. A relay device according to claim 6,

wherein said communication condition is defined by a type of said receiving communication terminal;

wherein said detection means includes receiving means for receiving data for transmission from said transmitter device to said receiving communication terminal, said data containing a type identifier identifying a type of said receiving communication terminal which is to receive said data for transmission;

wherein said identifying means identifies said control parameter on the basis of said type identifier contained in said data for transmission received by said receiving means and said memory content stored in said first control parameter storing means; and

wherein said transfer means transfers said data for transmission received by said receiving means by performing window control in a mode defined by said control parameter identified by said identifying means.

10. A relay device according to claim 9,

further comprising cache means for storing said data for transmission received by said receiving means,

wherein said transfer means transfers said data for transmission stored in said cache means to said receiving communication terminal by performing window control in a mode defined by said control parameter identified by said identifying means.

11. A relay device according to claim 6,

wherein said communication condition is defined by a data amount of said data for transmission;

wherein said detection means includes receiving means for receiving said data for transmission transmitted from said transmitter device to said receiving communication terminal and obtains a data amount of said data for transmission received by said receiving means;

wherein said identifying means identifies said control parameter on the basis of said identified data amount and said memory content in said first control parameter storing means; and

wherein said transfer means transfers to said receiving communication terminal said data for transmission received by said receiving means by performing window control in a mode defined by said control parameter identified by said identifying means.

12. A relay device according to claim 11,

further comprising cache means for storing said data for transmission received by said receiving means,

wherein said transfer means transfers said data for transmission stored in said cache means to said receiving communication terminal by performing window control in a mode defined by said control parameter identified by said identifying means.

13. A program product for causing a computer device to execute:

a process of storing data for transmission;

a process of storing a control parameter in correspondence with a communication condition pertaining to data transmission, said control parameter defining a mode of window control to be performed when transmitting in said communication condition said data for transmission through a communication network to a receiving communication terminal;

a process of detecting a communication condition of data transmission under which said data for transmission is to be transmitted prior to initiation of said data transmission;

a process of transmitting through said communication network said data for transmission to said receiving communication terminal; and

a process of performing, while executing said transmitting process, window control in a mode defined by a control parameter identified on the basis of said communication condition detected in said detecting process and a memory content stored in said process of storing a control parameter.

14. A program product for causing a computer device to execute:

a process of storing a control parameter in correspondence with a communication condition pertaining to data transmission, said control parameter defining a mode of window control to be performed when data for transmission is transmitted in said communication condition through a communication network to a receiving communication terminal;

a process of detecting a communication condition of data transmission under which said data for transmission is to be transmitted;

a process of identifying a control parameter on the basis of said communication condition detected in said detecting process and a memory content stored in said process of storing a control parameter;

a process of transferring said data for transmission transmitted from a transmitter device to said receiving communication terminal; and

a process of controlling said transmitter device to transmit said data for transmission by performing window control or of performing, while executing said transfer process, window control in a mode defined by said control parameter identified in said identifying process.