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Radio communication system and communication terminal apparatus used therein

A technology of a wireless communication system and a communication terminal, which is applied in the field of communication terminal devices and can solve problems such as transmission rate reduction and the like

Inactive Publication Date: 2002-11-20
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As described above, in the HDR system, there is a problem that although a high transmission rate (throughput) can be ensured near the base station, the transmission rate decreases as it approaches the edge of the coverage area
On the contrary, in order to maintain the average throughput of each channel, since too many users cannot be accommodated in the limited carrier frequency, it is necessary to limit the number of channels (number of users)

Method used

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  • Radio communication system and communication terminal apparatus used therein
  • Radio communication system and communication terminal apparatus used therein
  • Radio communication system and communication terminal apparatus used therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] image 3 It is an overlapping configuration diagram of the wireless communication system according to Embodiment 1 of the present invention. Figure 4 is a schematic configuration diagram of the wireless communication system according to Embodiment 1 of the present invention.

[0025] exist image 3 In the shown overlapping structure, a micro cell 102 covering a relatively narrow area is superimposed on a macro cell 101 covering a relatively wide area. Here, for simplicity of description, a case where service A is provided in macro cell 101 and service B is provided in micro cell 102 will be described. The overlapping cells in the overlapping structure are not limited to two types, but three or more types may be considered in the same way. In addition, the systems with different wireless transmission methods are not limited to two types, and three or more types may be similarly applied.

[0026] Here, the following case is explained: Service A is a voice service, wh...

Embodiment 2

[0053] In this embodiment, a case will be described in which the systems constituting the overlay structure are FDD (Frequency Division Duplex, Frequency Division Duplex) and TDD (Time Division Duplex, Time Division Duplex) of the CDMA system. The structure of the wireless communication system of this embodiment and Figure 4 or Image 6 The structure shown is the same. Therefore, in this embodiment, appropriate reference Figure 4 to explain.

[0054] A mobile station in a system with an overlapping configuration serving different systems has Figure 7 structure shown. A mobile station can communicate with multiple systems (base stations), including multiple receive trains, but in Figure 7 In order to simplify the description, only one series is represented.

[0055] The signal received via the antenna 501 is subjected to predetermined radio reception processing (down-conversion, A / D conversion, etc.) by the radio circuit 502 . The signal subjected to radio reception ...

Embodiment 3

[0073] In this embodiment, a case will be described in which a measurement result of a communication environment or a moving speed and a connection request are reported from a mobile station to one system, and a connection is determined based on a judgment of the base station side and communication is performed.

[0074] Figure 8 It is a block diagram showing the structure of a base station apparatus in the wireless communication system according to Embodiment 3 of the present invention.

[0075] First, as described in Embodiments 1 and 2 above, the mobile station transmits a control signal (connection request information) indicating that a connection is desired or the result of the measurement based on the measurement of each service, communication environment, and moving speed.

[0076] Signals including these control signals and measurement results are received via the antenna 601, and are subjected to predetermined wireless reception processing (down-conversion, A / D conve...

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Abstract

A voice signal of frequency f1 transmitted from a mobile station (MS) 201 serving as a communication terminal is received by a base station (BS) 202 , and received data obtained by performing predetermined processing is sent to a mobile switching center 204 via a radio network control station 203 . The MSC 204 aggregates the data from several base stations and sends them to the telephone line network 207. On the other hand, the high-speed packet of frequency f2 transmitted from the mobile station (MS) 201 is received by the base station (BS) 205, and the received data obtained by performing predetermined processing is routed by the router 206 and sent to the IP (Internet Protocol) packet network 208 .

Description

technical field [0001] The present invention relates to a communication terminal device used in a digital wireless communication system. Background technique [0002] With the development of Internet-related technologies in recent years, it has become possible to provide various services such as music distribution through the Internet. In this service, the transmission volume of the downlink is very large. In order to realize a service with a large amount of downlink transmission, high-speed packet transmission on the downlink is highly expected. On the other hand, various technical developments are underway for high-speed packet transmission on the downlink. [0003] In a cellular system, a system called HDR (High Data Rate) has been proposed as a high-speed packet wireless transmission system. Both the uplink and downlink of this system use the same bandwidth (1.25MHz) as the existing CDMA (Code Division Multiple Access, Code Division Multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M3/00H04W16/14H04W16/32
CPCH04W16/14H04W16/32H04W40/02H04W48/20
Inventor 宫和行
Owner PANASONIC CORP