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Communication method and terminal with data communication protocol for Inter-layer data flow control

A technology of data communication and communication method, which is applied in the direction of data exchange network, safety communication device, digital transmission system, etc., can solve the problems of reducing data transmission throughput and network utilization rate, and achieve the prevention of data transmission throughput and network utilization rate The effect of lowering

Inactive Publication Date: 2005-08-10
SONY CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of conventional data communication protocols is that avoiding packet loss within the terminal reduces data transfer throughput and network utilization

Method used

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  • Communication method and terminal with data communication protocol for Inter-layer data flow control
  • Communication method and terminal with data communication protocol for Inter-layer data flow control
  • Communication method and terminal with data communication protocol for Inter-layer data flow control

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no. 2 example

[0033] The second embodiment of the present invention adopts the second data flow control method. In this method, the data packet transmission rate of the data link layer is told to the transmission layer, and the transmission layer transmits the data packet at a rate lower than the transmission rate. to the lower tier.

[0034] In the second data flow control method, when data transmission starts, the data link layer program first informs the transport layer program of the data transmission rate of the data link layer. In addition, after the data transmission starts, every time the data transmission rate of the data link layer changes, the data link layer program notifies the transmission layer of the new data transmission rate. The transport layer program already has traffic shaping capabilities, that is, it is able to control the data transmission rate to the lower layers so that packets are delivered at a lower rate than the data link layer's data transmission rate.

[00...

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Abstract

A data communication protocol is implemented to control data flow between a transport layer (13) and a data link layer (11). The protocol provides two manners of data flow control. In the first control manner, when the occupancy of packet buffers of the data link layer (11) is smaller than a first threshold, the data link layer informs of the transport layer that the packet transport should be suspended, and thereafter when the occupancy is smaller than a second threshold smaller than the first one, the data link layer requests the transport layer (13) to resume the packet transfer. In the second control manner, when the amount of packets is smaller than a value determined based on the transfer rate and maximum burst size, the transport layer transfers a packet to a lower layer, and when the packet amount is larger than the value, a packet is transferred after a predetermined time passes to control the transfer rate to a predetermined one.

Description

technical field [0001] The invention relates to a communication method for transmitting data packets between a transmission layer and a data link layer by using a data communication protocol, and a data communication terminal for performing data communication by using the data communication protocol. Background technique [0002] Data communication protocol is the interactive condition of data communication, TCP / IP (Transmission Control Protocol and Internet Protocol) and OSI (Open Systems Interconnection) protocols generally have figure 1 Hierarchy shown. As shown, the hierarchy includes application layer 16 , presentation layer 15 , session layer 14 , transport layer 13 , network layer 12 , data link layer 11 , and physical layer 10 at the level of operations executable by an application program. Among them, the application layer 16 includes the characteristics of the data communication terminal, encoding control functions, and the like. The presentation layer 15 include...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L13/08H04L47/30
CPCH04L69/32H04L49/9063H04L49/9078H04L49/90H04L29/08009H04L29/06H04L9/40H04L47/10H04L69/321
Inventor 山下敬田中裕之内海秀介盐野崎敦
Owner SONY CORP
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