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Measurement of channel characteristics in a communication system

A technology of communication system and channel measurement, applied in the field of communication system, can solve the problems that the corrected CQI report cannot be used, and the closed-loop power control cannot run fast enough, etc.

Inactive Publication Date: 2010-12-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However when the MS is moving at high speed, closed loop power control cannot run fast enough to track the fading in the channel as the channel becomes irrelevant from one time slot to the next
In such environments, the BS cannot reliably correct the CQI reporting using power control commands received from the MS

Method used

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  • Measurement of channel characteristics in a communication system
  • Measurement of channel characteristics in a communication system
  • Measurement of channel characteristics in a communication system

Examples

Experimental program
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Embodiment Construction

[0023] see figure 1 , a radio communication system includes a master station (BS) 100 and a plurality of slave stations (MS) 110 . BS 100 comprises microcontroller (μC) 102, radio transceiver means (Tx / Rx) 104 connected to antenna means 106, power control means (PC) 107 for varying the transmitted power level, and means for connecting to Connection means 108 for PSTN or other suitable network. Each MS 110 comprises a microcontroller (μC) 112, radio transceiver means (Tx / Rx) 114 connected to antenna means 116, and power control means (PC) 118 for varying the transmitted power level. While communication from MS 110 to BS 100 occurs on uplink channel 124 , communication from BS 100 to MS 110 occurs on downlink channel 122 .

[0024] With particular regard to systems incorporating HSDPA functionality, MS 110 makes regular measurements of the characteristics of downlink channel 122, which MS 110 reports to BS 100 over uplink channel 124, as discussed in the introductory section a...

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Abstract

A communication system comprises a downlink data channel for the transmission of data packets from a primary station to a secondary station and uplink and downlink control channels. The secondary station measures one or more characteristics of the data channel and issues a report to the primary station, which determines an operational parameter of the data channel in response to the report. The secondary station determines average channel characteristics over a measurement period. The length of the measurement period may be signalled by the primary station or determined directly by the secondary station. In one embodiment the selected period depends on the speed (V) of the secondary station. This is determined (604) by either station and tested to determine (606) whether it is outside therange for the current measurement period: if it is the period is reset (608).

Description

technical field [0001] The present invention relates to a communication system, and also to a master-slave station used in such a system and to a method of operation of such a system. Although this specification describes a system with particular reference to the Universal Mobile Telecommunications System (UMTS), it should be understood that such techniques are equally suitable for use in other communication systems. Background technique [0002] There is an increasing demand in the field of mobile communications for a system capable of downloading large chunks of data to a mobile station (MS) at a reasonable rate on demand. Such data can be, for example, web pages from the Internet, possibly including video clips or similar data. Generally a particular MS will only need such data intermittently, so a fixed dedicated link bandwidth is not appropriate. To meet this demand in UMTS, a High Speed ​​Downlink Packet Access (HSDPA) scheme is being developed, which can facilitate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W24/10H04B17/00H04L29/06H04W72/54H04B7/005H04B7/26H04L1/00H04L1/20H04W52/14H04W52/28
CPCH04B17/0067H04B17/0077H04L1/20H04W52/286H04W24/10H04L1/0026H04W52/143H04B17/0042H04L1/0001H04B17/24H04B17/309H04B17/382H04W28/18
Inventor M·P·J·巴克T·J·莫斯莱伊
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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