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Transmission device

A technology of transmission device and data packet, which is applied in the direction of transmission system, selection device, digital transmission system, etc., and can solve the problems of not being able to adapt well and not being able to identify streaming media data, etc.

Inactive Publication Date: 2009-10-14
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is also VBR (Variable Bit Rate), which is a method of compressing video at a variable bit rate. In such an application, the data transmission rate changes with time. Therefore, streaming data cannot be recognized, or even if there is a bandwidth control device. The problem that the average request data transfer rate cannot be well adapted

Method used

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no. 1 approach

[0079] figure 1 It is a block diagram showing a schematic configuration of the transmission device according to the first embodiment of the present invention. The transmission device 1 includes: a sublayer 101, which receives data packets from application programs or data packets from different networks, and controls the entire transmission device 1; a media access controller 121, which transmits data through wireless media, etc. transceiving; and MAC management / entity 131 .

[0080] The media access controller 121 performs control related to data processing such as beacon transmission and reception, data transmission and reception when the observed medium is idle, polling response, generation of ACK, and retransmission control.

[0081] The MAC management / entity 131 performs control related to MAC management, such as issuing a bandwidth request command to the bandwidth control device, processing a response from the bandwidth control device, and managing a media unique ID.

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no. 2 approach

[0145] The transmission device described in the first embodiment of the present invention is effective for fixed bit rate applications, but may not be effective for variable bit rate applications. The transmission device according to the second embodiment of the present invention can also be applied to variable bit rate applications.

[0146] The transmission device according to the second embodiment of the present invention differs from the transmission device according to the first embodiment in that the VBR buffer 110 is added and that the function of the stream data judging unit 106 is different. Therefore, detailed descriptions of redundant structures and functions are not repeated. In addition, the reference numeral of the stream data judging unit in this embodiment will be described as 106'.

[0147] Figure 16 This is a diagram for explaining the concept of buffering a change in the bit rate using the buffer 110 for VBR. Such as Figure 16 As shown, the bit rate of...

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Abstract

A stream number calculation unit (102) classifies packets of data to be transmitted according to packet headers. The stream data judging unit (106) manages a set of packets having the same packet header as a packet group according to the classification result of the stream number calculating unit (102), and judges whether to Ensure bandwidth while transmitting. Then, the bandwidth request command generation unit (107) requests the bandwidth control device for bandwidth reservation of the packet group judged by the stream data judging unit (106) that the bandwidth should be secured and transmitted. Therefore, even when the transfer condition is not specified by the application, it is possible to automatically reserve bandwidth and transfer data.

Description

technical field [0001] The present invention relates to a technology for ensuring QoS (Quality of Service) to transmit data on a network, and more particularly to monitoring data packets flowing on a transmission path of a network that guarantees QoS, and identifying data packets that should be transmitted while ensuring bandwidth. A transmission device that makes a bandwidth request to the bandwidth control device for a data flow. Background technique [0002] In recent years, in a network such as a wireless LAN (Local Area Network, local area network), experiments have been made to simultaneously transmit streaming data requiring real-time performance and other data, and the realization is beginning to begin. [0003] Since data has various properties, the transmission conditions that must be satisfied when these data are transmitted differ from data to data. For example, in WWW (World Wide Web) or file transfer, even if there is some transmission delay, it is necessary t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/28H04L12/56H04Q7/38H04L47/762H04W28/00H04W28/26
CPCH04L47/2441H04W28/26H04L47/828H04L47/14H04L12/5695H04L47/724H04L47/2416H04L47/10H04L47/15H04L47/70H04W28/02H04W8/04
Inventor 山田雄介
Owner SHARP KK
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