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CDMA mobile communication method and system

A mobile communication and mobile station technology, applied in the field of CDMA mobile communication, can solve the problems of reducing the reception characteristics of downlink mobile stations, hindering the optimization of downlink HS-DSCH signal modulation method and coding rate, and misidentifying the propagation path state.

Inactive Publication Date: 2006-06-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a base station mistakenly receives a report pointing to another base station, the base station receiving the wrong report will wrongly identify the state of the propagation path, and may hinder the optimization of the downlink HS-DSCH signal modulation method and coding rate, which will reduce the downlink mobile station reception characteristics

Method used

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  • CDMA mobile communication method and system
  • CDMA mobile communication method and system
  • CDMA mobile communication method and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0031] Fig. 3 is a block diagram showing the configuration of a CDMA mobile communication system according to Embodiment 1 of the present invention. Here, for simplicity, only three base stations (BS-A to BS-C) 101a to 101c and one mobile station (MS) 103 are shown, but these are of course not limitations on the number of base stations and mobile stations.

[0032]The CDMA mobile communication system shown in FIG. 3 is applied to the above-mentioned HSDPA which is currently being standardized. In this system, two-way communication is performed using the DPCH communication channel which is a conventional channel, and in parallel with this, the mobile station 103 receives signals from the base stations 101a to 101c using the HS-DSCH high-speed channel in the downlink, and in the uplink wherein, in response to the HS-DSCH signal from said base station 101a to 101c, an ACK / NACK signal is returned to a specific base station 101a to 101c. For example, if the mobile station 103 norm...

Embodiment 2

[0042] FIG. 5 is a block diagram showing the configuration of a CDMA mobile communication system according to Embodiment 2 of the present invention. This CDMA mobile communication system has the same kind of basic configuration as the CDMA mobile communication system shown in FIG. 2, and therefore the same constituent elements in FIG. 5 as in FIG. 3 are assigned the same codes as in FIG. 3 and their detailed explanations are omitted.

[0043] A special feature of this embodiment is that the mobile station 103 transmits in the uplink a signal (reception status report signal) reporting the reception status of the downlink pilot signal from any one of the base stations 101a to 101c as a signal that should identify the base station, instead of the signal shown in FIG. ACK / NACK signal shown in 3. To this end, the mobile station 103 has a section (not shown) that detects or measures the reception state of the downlink pilot signal. Since, as described above, although a plurality of...

Embodiment 3

[0048] FIG. 6 is a block diagram showing the configuration of a CDMA mobile communication system according to Embodiment 3 of the present invention. The CDMA mobile communication system has the same kind of basic configuration as the CDMA mobile communication system shown in FIG. 3, and therefore the same constituent elements in FIG. 6 as in FIG. 3 are assigned the same codes as in FIG. 3 and their detailed explanations are omitted.

[0049] A special feature of this embodiment is that the mobile station 103 transmits a signal (modulation method / coding rate specifying signal) specifying the modulation method and / or coding rate of the signal from the base stations 101a to 101c to the mobile station 103 in the uplink as the The signal of the base station instead of the ACK / NACK signal shown in FIG. 3 . For this purpose, the mobile station 103 has a part (not shown) that detects or measures the receiving state of the downlink pilot signal and a part (not shown) that determines th...

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Abstract

A CDMA mobile communications technology that identifies each base station with a high degree of accuracy in the uplink from a mobile station to a base station, thereby improving reception characteristics at the uplink base station. The mobile station (103) responds to ACK / NACK signals for signals directed to all base stations (101a to 101c) (DPCH signals) and signals directed to a specific base station (101a to 101c) (for HS-DSCH signals from the base stations (101a to 101c) ), assign different short codes. The signal is transmitted by spreading using an assigned short code and a long code that is unique to itself. Then, the base stations (101a to 101c) receive the signal from the mobile station (103) and despread the received signal using the assigned short code and the long code unique to the mobile station (103), thereby regenerating the signal before spreading.

Description

technical field [0001] The present invention relates to a method for wireless communication between a base station and a mobile station, in particular to a CDMA (Code Division Multiple Access) mobile communication method and system for wireless mobile communication. Background technique [0002] In the standardization of techniques for performing packet transmission, development called HSDPA (High Speed ​​Downlink Packet Access) is underway as an extended W-CDMA (Wideband-Code Division Multiple Access) system. [0003] In this system, two-way communication is performed between a base station and a mobile station using a communication channel called DHCP (Dedicated Downlink Physical Channel) defined in the conventional W-CDMA method, and in parallel with this, the mobile station uses the A high speed channel called HS-DSCH (High Speed ​​Downlink Shared Channel) is received. At this time, the mobile station returns an ACK (acknowledgment; confirmation response) signal on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/38H04B1/707H04B1/7103H04J13/18H04W16/02H04W16/12H04W36/00H04W76/02
CPCH04W16/02H04J13/004H04J13/18
Inventor 铃木秀俊
Owner PANASONIC CORP
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