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A method and device for transmitting tcp data ove asymmetric links

A technology for transmitting data and links, which is applied in the field of data transmission, can solve problems such as constraints, and achieve the effect of improving the performance of downloading TCP

Inactive Publication Date: 2009-11-04
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the downlink performance is also constrained by the uplink bit rate

Method used

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  • A method and device for transmitting tcp data ove asymmetric links
  • A method and device for transmitting tcp data ove asymmetric links
  • A method and device for transmitting tcp data ove asymmetric links

Examples

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Embodiment Construction

[0028] exist image 3 , shows a diagram of two synchronous TCP connections, which are a TCP connection in the downlink and an uplink in the downlink established between a server such as a regular content server and a terminal such as a mobile terminal in a wireless network. TCP connections in the link. Note that the TCP connections can be terminated in different servers, however for simplicity of illustration the example is now illustrated with a single server.

[0029] The access facility used to connect the server and the terminal may be, for example, UTRAN, CDMA2000, and LTE. The uplink TCP connection is adapted to provide half the load in the downlink compared to a conventional TCP connection. This can be achieved by limiting the TCP window of the upload connection to half of the TCP window provided by the download TCP connection. The result is that the download link will achieve twice as much traffic as the upload link, assuming that each ACK clock outputs an equal siz...

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Abstract

In a method and device the TCP load offered in the uplink is manipulated such that an offered load asymmetry is achieved. Using such an arrangement it is possible to compensate for a link asymmetry when uplink and downlink connections are sharing the same uplink buffer in order to increase performance of the downlink. The method and device are capable of increasing the download performance both in the case when TCP connections are terminated in a different device than the terminal where the link layer is terminated, as well as when the TCP connections are terminated in the same device as the link-layer.

Description

technical field [0001] The present invention relates to methods and devices for transmitting data. In particular, the present invention relates to methods and devices for synchronous reception and transmission of data. Background technique [0002] Asymmetry often exists in wireless transmission links. This is especially true in cellular communication networks. For example a downlink is usually capable of supporting much higher bit rates than a corresponding uplink. There are many reasons for this asymmetry, but one basic reason is that a downlink transmitting unit (ie a base station) is usually able to use much higher transmit power than a corresponding uplink transmitting unit (ie a mobile terminal). [0003] Other reasons include eg multi-user scheduling and link adaptation issues: downlink transmitters can often be better equipped to maintain orthogonality between transmissions for different users eg by time division multiplexing. However, multi-user scheduling and l...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L1/18H04L47/27
CPCH04L69/16H04L69/163H04L47/10H04L47/14H04L29/06095H04W28/10H04L1/1835H04L1/1635H04L47/193H04L29/06115H04L47/27H04L1/1832H04W8/04
Inventor 马茨·萨格弗斯瓦帕斯·阿克巴尔迈克尔·迈尔
Owner TELEFON AB LM ERICSSON (PUBL)
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