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Radio communication system

A radio communication, communication channel technology, applied in wireless communication, transmission system, digital transmission system, etc., can solve problems such as insufficient to cope with various receiver implementations

Inactive Publication Date: 2005-02-09
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such an arrangement is not flexible enough to accommodate various receiver implementations

Method used

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  • Radio communication system
  • Radio communication system
  • Radio communication system

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Embodiment Construction

[0016] see figure 1 , a radio communication system includes a primary station (BS) 100 and a plurality of secondary stations (MS) 110 . The BS 100 comprises a microcontroller (μC) 102, transceiver means (Tx / Rx) 104 connected to antenna means 106, power control means (PC) 107 for varying transmit power levels and means for connecting to PSTN or Connection means 108 for other suitable networks. Each MS 110 comprises a microcontroller ([mu]C) 112, transceiver means (Tx / Rx) 114 connected to antenna means 116 and power control means (PC) 118 for varying transmit power levels. Communication from BS 100 to MS 110 occurs on downlink channel 122 , while communication from MS 110 to BS 100 occurs on uplink channel 124 .

[0017] As discussed above, it is a common requirement for the MS 110 to report the quality of the downlink channel 122 to the BS 100 . For example, in a UMTS High Speed ​​Downlink Packet Access (HSDPA) scheme, the BS 100 determines a suitable transmission scheme (TF...

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Abstract

In a radio communication system comprising a primary station ( 100 ) and a secondary station ( 110 ), the primary station is able to employ one of a plurality of transmission schemes for transmissions to the secondary station. The secondary station determines a quality parameter relating to a downlink channel ( 122 ) and from this parameter determines a measurement report to signal to the primary station. The measurement report indicates a suitable transmission power for one transmission scheme, and the primary station is able to determine from a plurality of power offsets between transmission schemes respective transmission powers for a plurality of transmission schemes. The power offsets may be signalled to the primary station by the secondary station. Such a scheme provides sufficient flexibility to handle a wide range of receiver capabilities without the need for excessive signalling.

Description

technical field [0001] The present invention relates to a radio communication system and also to primary and secondary stations for use in such a system and a method of operating such a system. Although this specification describes a system with specific reference to the Universal Mobile Telecommunications System (UMTS), it will be understood that the techniques are equally applicable to other mobile radio systems. Background technique [0002] A common requirement within a radio communication system is to have a bi-directional communication channel between a primary station and a secondary station for the secondary station to report to the primary station the quality of the downlink channel from the first station to the second station. Such information enables the primary station to optimize the transmission on the downlink channel, for example by choosing a modulation scheme suitable for the channel quality. However, the required signaling adds some overhead which is desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B7/005H04L1/00H04L1/16H04W52/16H04W52/24H04W52/28H04W52/42H04W52/54
CPCH04L2001/0092H04L1/1671H04W52/16H04L1/0003H04L1/0009H04W52/54H04W52/42H04W52/24H04W52/286H04L1/0026H04W52/247H04W28/24
Inventor T·J·莫斯莱伊M·P·J·巴克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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