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Method and apparatus for packet scheduling

A technology of packet scheduling and packet data, applied in the direction of digital transmission system, data exchange network, electrical components, etc., can solve problems such as inefficiency

Inactive Publication Date: 2006-03-22
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this has proven to be inefficient in practice, since the number of UEs using each type of service may vary, resulting in fixed weights that do not provide good QoS for the services involved

Method used

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  • Method and apparatus for packet scheduling
  • Method and apparatus for packet scheduling
  • Method and apparatus for packet scheduling

Examples

Experimental program
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Embodiment Construction

[0066] Fig. 4 shows a block diagram of a packet scheduling device 10 embodying the present invention. The apparatus 10 is for scheduling data packets to be transmitted from a sender to a plurality of receivers over at least one channel. Scheduling decisions are made for each successive scheduling instant (eg, each TTI). The transmitter is, for example, a base station (Node B) in a wireless communication system. In this case, the multiple receivers are different UEs served by the base station.

[0067] The device 10 comprises a first indicator generating unit 12 receiving data related to the performance of the scheduling device. This data may include, for example, a carrier-to-interference (C / I) report and information related to the fill level of the source queue where, in the sender, data to be sent to a different receiver is buffered before being sent middle.

[0068] Based on the received data, the first indicator generation unit 12 generates a set of first indicators of...

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PUM

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Abstract

Packet scheduling apparatus schedules packets of data for transmission from a transmitter such as a Note B to a plurality of receivers such as a plurality of UEs via at least one channel, for example in a high-speed downlink packet access system (HSDPA). A first measures producing unit produces first measures of scheduling performance in at least two different aspects. A decision unit employs a weighted combination of the first measures to decide the receiver(s) to which packets are to be transmitted. The weighted combination is produced by combining the first measures according to respective corresponding weights. A second measures producing unit produces at least one second measure of scheduling performance. A classifying unit classifies the weights for the or each second measure into at least two different classes of weights according to a probable influence the weight is expected to have on the second measure concerned. A weight adapting unit employs the or each second measure, together with the classification of the weights for the or each second measure, to adapt the weights.

Description

technical field [0001] The present invention relates to methods and apparatus for packet scheduling used eg in wireless communication systems. Background technique [0002] FIG. 1 shows a part of a wireless communication system 1 . The system comprises a plurality of base stations 2, only one of which is shown in FIG. 1 . Base station 2 serves a cell, and there may be multiple independent users in the cell. Each user has an independent user equipment (UE). In FIG. 1 only user equipments UE2, UE11 and UE50 are shown. Each UE is, for example, a portable terminal (cell phone) or a portable computer. [0003] It is well known that in Code Division Multiple Access (CDMA) systems, different channelization codes are used to distinguish signals transmitted from a base station (also called "Node B") to different UEs. In so-called third generation wireless communication systems, High Speed ​​Downlink Packet Access (HSDPA) technology has been proposed for transmitting data in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
Inventor 赛义德·阿备帝
Owner FUJITSU LTD