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Method and apparatus for reduction of congestion through data rate adjustment in wireless communication system

A wireless communication system, data rate technology, applied in the field of communication systems

Inactive Publication Date: 2004-10-20
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, without any congestion control, the system can only operate at a much lower capacity than it is rated for

Method used

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  • Method and apparatus for reduction of congestion through data rate adjustment in wireless communication system
  • Method and apparatus for reduction of congestion through data rate adjustment in wireless communication system
  • Method and apparatus for reduction of congestion through data rate adjustment in wireless communication system

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Embodiment Construction

[0017] The term "exemplary" is used exclusively herein to mean "serving as an example, circumstance and illustration". Any embodiment discussed herein by way of example is not necessarily limited to being better or more advantageous than other embodiments.

[0018] This paper refers to a mobile subscriber station as an access terminal, AT, which can be mobile or fixed, and can also communicate with one or more base stations. An access terminal sends and receives packetized data to and from a base station controller, referred to as a modem pool controller, MPC, through one or more modem pool transceivers. The modem pool controllers of the modem pool transceivers are all part of the access network. An access network transports data packets between multiple access terminals. The access network can also be connected to other networks than the access network, such as a corporate intranet or the Internet, and can transport data packets between the various access terminals and such...

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Abstract

Method and apparatus for congestion control in a wireless communication system. Individual target data rate values are assigned individual access terminals. The individual data rates of the access terminals are adjusted to achieve the corresponding individual target data rate values. If the target values are not achieved within a predetermined number of iterations, the individual data rate is adjusted. In one embodiment, the status of a congestion bit indicates the type of adjustment, such as increase or decrease, wherein the status of the congestion bit is determined by comparing a congestion parameter to a predetermined threshold. One embodiment implements an outerloop threshold having a margin with respect to the desired congestion metric threshold. According to one embodiment, a congestion indicator includes multiple bits, wherein at least one bit instructs the mobile station to use target values or else to adjust without regard to a target value.

Description

field of invention [0001] The present invention relates to a communication system, in particular to a method and device for congestion control in a wireless communication system. Background technique [0002] In a wireless communication system, a base station communicates with multiple mobile users. Wireless communications may include low latency data communications, such as voice or video transmissions, or high data rate communications, such as packetized data transmissions. US Patent Application No. 08 / 963,386, filed October 3, 1997, entitled "Method and Apparatus for High Rate Packet Data Transmission," discusses high rate packet data transmission, the contents of which are incorporated herein by reference. [0003] In wireless communication systems, especially those used for packetized transmissions, congestion and overload can reduce the throughput of the system. Congestion is a measure of the amount of waiting and active traffic relative to the ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L12/56H04W28/08H04W28/22
CPCH04L47/14H04L47/10H04L47/263H04L47/11H04W28/08H04W28/22H04W28/0231H04W28/0289H04W28/10H04W28/0958H04L47/40H04W8/04
Inventor A·加伊恩J·M·霍尔茨曼
Owner QUALCOMM INC
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