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Radio communication system

A series of signal-based technologies, applied in the field of radio communication systems, which can solve the problems of conflicting uplink transmit power, difficulty in scheduling, and inability to optimize transmit power.

Inactive Publication Date: 2007-01-10
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of this "soft handover" approach is that it is impossible to optimize the uplink and downlink transmit power of each individual radio link, because only one set of power control commands is transmitted in the uplink, and the Power control commands transmitted over the downlink may result in conflicting requirements for uplink transmit power
In networks with a large number of MSs requiring high-speed downlink packet transmission, the requirement to send the complete status of n-channel transmissions from one BS to another can lead to scheduling difficulties and excessive signaling traffic in the network

Method used

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Examples

Experimental program
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Embodiment Construction

[0024] refer to figure 1, the radio communication system includes a primary station (BS) 100 and a plurality of secondary stations (MS) 110 . The BS 100 comprises: microcontroller (μC) 102; transceiver means (Tx / Rx) 104, which is connected to antenna means 106; power control means (PC) 107, for varying the transmission power level; and connection means 108 , for connecting to the PSTN or other appropriate network. Each MS 110 comprises: a microcontroller (μC) 112; transceiver means (Tx / Rx) 114 connected to antenna means 116; and power control means (PC) 118 for varying the transmit power level. Communication from BS 100 to MS 110 occurs on downstream channel 122 and communication from MS 110 to BS 100 occurs on upstream channel 124 .

[0025] figure 2 An MS 110 operating in an HSDPA system is illustrated in , with three bi-directional communication channels 226a, 226b, 226c, each channel including an uplink and a downlink channel with three corresponding BSs 100a, 100b, 10...

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Abstract

A radio communication system comprises a primary station which is arranged to transmit a series of data packets to a secondary station which operates according to an ARQ scheme for acknowledging correct reception of each packet. The primary station transmits error correction information relating to any packets that are not received correctly, thereby enabling the secondary station to extract correctly the data. The data packets are transmitted via a plurality of logical channels, so that an error in transmission of one packet does not hold up transmission of packets in other channels. Transfer of data transmission from one primary station to another is done by transferring each channel when correct reception of a data packet on that channel has been acknowledged, thereby avoiding the extra signalling required in transferring logical channels in which a data packet has been received in error and the error correction transmissions have not been completed.

Description

technical field [0001] The present invention relates to radio communication systems, and also to primary and secondary stations for such systems, and methods of operating such systems. Although this specification describes the system with particular reference to the Universal Mobile Telecommunications System (UMTS), it should be understood that the techniques are equally applicable to other mobile radio systems. technical background [0002] In the field of mobile communications, there is a growing need for systems capable of downloading large amounts of data to mobile stations (MS) on demand at a reasonable rate. For example, such data could be web pages from the Internet, which might contain content such as video clips. A specific MS usually only needs this kind of data intermittently, therefore, a fixed-bandwidth dedicated link is not suitable. To meet this requirement in UMTS, a High Speed ​​Downlink Packet Access (HSDPA) scheme is being developed, which enables transm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04Q7/22H04L29/08H04L1/18H04L12/56H04W28/04H04W36/02H04W36/18
CPCH04W36/02H04L1/18H04W36/18H04W28/04
Inventor M·P·J·巴克T·J·穆尔斯利B·亨特
Owner KONINKLIJKE PHILIPS ELECTRONICS NV