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Forward channel schedule algorithm for HDR system

A forward channel and scheduling algorithm technology, applied in the field of forward channel scheduling algorithms, can solve problems such as the inability to meet the QoS requirements of mobile terminals

Inactive Publication Date: 2004-12-01
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, QoS requirements for mobile terminals cannot be met

Method used

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  • Forward channel schedule algorithm for HDR system
  • Forward channel schedule algorithm for HDR system
  • Forward channel schedule algorithm for HDR system

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Embodiment Construction

[0031] figure 2shows the steps involved in the scheduling algorithm according to one embodiment of the invention, while image 3 is a graph showing some possible relationships between the number of mobile terminals and the scaling factor (α(n)) explained in detail below.

[0032] like figure 2 As shown, the scheduling algorithm includes collecting state information of connected terminals and calculating a predetermined weight (α(n)) (S20-S23) proportional to the number of connected terminals, based on the collected state information and weighting (α( n)) calculates the priority value of each terminal (S24), and selects the terminal having the highest priority value and provides the service to the selected terminal (S25).

[0033] Formula (2) is a formula for calculating the priority (P) value in the scheduling algorithm according to the present invention.

[0034] P i = ( - log ...

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Abstract

A system and method for performing forward channel scheduling for an HDR system includes collecting status information of connected terminals, calculating a predetermined weight (alpha(n)), calculating priority values of respective terminals based on the collected status information and the weight (alpha(n)), and selecting a terminal having the highest priority value and providing the selected terminal with the service. By considering the number of connected mobile terminals, disadvantages of other proposed scheduling algorithms are overcome. Also, the entire throughput of the HDR system is improved by maintaining Quality of Service (QoS) of the mobile terminals that require the real-time service.

Description

technical field [0001] The present invention relates generally to High Data Rate (HDR) systems, and more particularly to forward channel scheduling algorithms implemented in HDR systems. Background technique [0002] A High Data Rate (HDR) system is a third generation mobile communication system for providing high-rate packet data services in addition to real-time voice services. Some experiments for providing real-time services such as video telephony and VOD have tried to be used on current HDR systems, and some service providers have actually provided VOD on HDR systems. [0003] The forward channel of the HDR system uses a Time Division Multiple Access (TDMA) method. The TDMA method divides time into predetermined intervals (time slots) and assigns each time slot to a mobile terminal to provide services to a plurality of mobile terminals. At this time, the base station uses a scheduling algorithm to select a mobile terminal to be served on each respective time slot. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/00H04L12/56H04W72/12
CPCH04L47/24H04L47/283H04L49/90H04L12/5693H04W72/1242H04W72/1221H04L47/50H04W72/569H04W72/56H04W72/51H04W28/0268
Inventor 崔永进
Owner LG ELECTRONICS INC