Gateway device, communication system and flow control method

A gateway and resource information technology, which is applied in the field of gateway devices, communication systems and flow control, to achieve the effects of data flow optimization, performance improvement, and reduction of the number of resent messages

Active Publication Date: 2015-01-14
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] As mentioned above, how to provide an appropriate gateway device for a resource-constrained network including terminal equipment with a dormancy function to perform appropriate data flow control, thereby reducing th

Method used

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  • Gateway device, communication system and flow control method
  • Gateway device, communication system and flow control method
  • Gateway device, communication system and flow control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Below, refer to Image 6 , 8 -14 describes Example 1 based on the above-mentioned embodiment.

[0084]Assume that a user on an unrestricted network with an address of 10.1.1.3 wants to query temperature data on a terminal device with an address of 192.168.1.1 on a resource-restricted network. The user constructs a query request message, including the query request method, the query content is temperature, and the destination address is the terminal device 192.168.1.1, and then sends it to the unrestricted network communication interface of the resource-constrained network gateway device.

[0085] Assuming that when this request message is received by the gateway device, the target terminal equipment is still in a dormant state, and currently there are two request messages being cached in the request message buffer, one with a request ID101 and one with a request ID102. Request message record table such as Image 6 shown. Subsequently, the request message analysis un...

Embodiment 2

[0090] Next, Embodiment 2 will be described with reference to 6, 15 to 20 in the same manner. Assume that a user on an unrestricted network with an address of 10.1.1.4 wants to control temperature data on a terminal device with an address of 192.168.1.1 on a resource-restricted network. The user constructs a control request message, including the control request method, the control content is temperature, and the destination address is the terminal device 192.168.1.1, and then sends it to the unrestricted network communication interface of the resource-constrained network gateway device.

[0091] Assuming that when this request message is received by the gateway device, the target terminal equipment is still in a dormant state, and currently there are two request messages being cached in the request message buffer, one with a request ID101 and one with a request ID102. Request message record table such as Image 6 shown. Subsequently, the gateway device parses the request me...

Embodiment 3

[0097] Below, refer to Figure 21 to Figure 24 Example 3 will be described. Assume that a user on an unrestricted network with an address of 10.1.1.5 wants to query temperature data on a terminal device with an address of 192.168.1.5 on a resource-restricted network. The user constructs a query request message, including the query request method, the query content is temperature, and the destination address is the terminal device 192.168.1.5, and then sends it to the unrestricted network communication interface of the resource-constrained network gateway device.

[0098] When this request message is received by the gateway device, the target terminal equipment is still in a dormant state at this time, and the request message record table at this time is as follows: Figure 21 shown. At this point, there are already 4 request messages cached in the gateway device. Subsequently, the gateway device parses the request message and performs retransmission detection. Because at t...

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PUM

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Abstract

The invention provides a gateway device, a communication system and a flow control method capable of reducing communication flow. The gateway device comprises a request message receiving part, a request message analysis part, a request message recording part, a request message caching part and a request message cache management part, wherein the request message receiving part is used for receiving a request message with a terminal device having a sleep function in a limited network as the access target is received, the request message analysis part is used for analyzing the received request message and obtaining information contained in the request message, and the request message recording part is used for building and saving a request message record specific to the received request message with reference to the information obtained by the request message analysis part; the request message caching part is used for caching the request message which is to be sent to the terminal device having the sleep function; the request message cache management part is used for discarding the received request message instead of caching the received request message in the request message caching part and adding a discard mark to the request message record corresponding to the received request message when it is judged that the cache space of the request message caching part is full.

Description

technical field [0001] The present invention relates to a gateway device, a communication system and a flow control method, in particular to a gateway device, a communication system and a flow control method used in a resource-constrained network including a terminal device with a sleep function. Background technique [0002] End devices in resource constrained networks are usually powered by batteries with limited power. For the consideration of energy saving, these terminal devices are in the dormant state for energy saving most of the time, but they will resume the working state periodically, and will enter the dormant state again after working for a short time. A terminal device in a dormant state cannot receive and send messages, and only in a working state can the terminal device be able to interact and process messages. [0003] In addition, in the existing communication system, since the communication protocols of the restricted network and the unrestricted network ...

Claims

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Application Information

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IPC IPC(8): H04L12/801
Inventor 安勍何璇马元琛
Owner HITACHI LTD
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