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Mobile communication system using a downlink shared channel

a mobile communication system and shared channel technology, applied in the field of communication, can solve the problems of increasing infrastructure costs, adverse effects on dsch rate, and lowering communication quality, and achieve the effect of improving the communication ra

Inactive Publication Date: 2007-08-02
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an efficient communication method and device based on the current DSCH technique, which can improve the communication rate and allow for the implementation of future diversified service modes. The invention aims to solve the problem of wasting transmission resources when distributing the same data to multiple mobiles by performing multi-cast communication of data in respect of one or more mobiles using DSCH. The wireless network control device, base stations, and mobiles are equipped with necessary functional sections and table means to implement multi-cast communication using DSCH. The invention also includes an identification function for identifying whether data on the DSCH is unicast or multicast.

Problems solved by technology

There is therefore: considerable waste from the point of view of efficiency of use of wireless and wired transmission channels and it is thought that, as a result of the accumulation of the amount of data destined for the mobiles, the DSCH rate will be adversely affected and communication quality will tend to be lowered.
Although this problem may apparently be solved by fortifying the infrastructure, this results in increased costs of the infrastructure and so in increased communication charges and cannot but put a brake on future diversification and development of service modes.

Method used

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  • Mobile communication system using a downlink shared channel
  • Mobile communication system using a downlink shared channel
  • Mobile communication system using a downlink shared channel

Examples

Experimental program
Comparison scheme
Effect test

case b

[0118] [Case B]

[0119] Case B, shown in FIG. 12B, is also a case in which signaling is transmitted with DCH. Unlike the case of FIG. 12A, it has a characteristic feature in regard to the method whereby generation and transmission of the signaling data are performed by the DSCH processing section 500 and mapping of the signaling data onto the DCH is performed by the circuit terminating section 506.

[0120] The DSCH processing section 500 performs transmission of signaling data to the circuit terminating section 506 using the same channel ID as the channel of the DCH where the macro diversity processing section 505 terminates. The channel ID whereby signaling transmission was performed by the DSCH processing section 500 is the same as the ID of the DCH corresponding to the mobile that is to receive the signaling, so the signaling data is merged with the DCH in the circuit terminating section 506 before being transmitted to the corresponding mobile through the base station 304.

[0121] It...

case c

[0122] [Case C]

[0123] In case C shown in FIG. 12C, a channel for signaling (signaling bearer) is newly set up between the DSCH processing section 500 and base station 304. This is an example in which signaling data is transmitted using this channel. In this case, the signaling data that is generated in the DSCH processing section 500 is transmitted by the signaling bearer at which the DSCH processing section 500 terminates, without modification.

case d

[0124] [Case D]

[0125] In the case D shown in FIG. 12D, a channel for signaling (signaling bearer) is newly set up between the macro diversity processing section 505 and the base station 304; this is an example of the case where signaling data is transmitted using this channel. This case also is the same as case A.

[0126]FIG. 13 is a view showing the processing flow during DSCH transmission in the wireless network control device 303, in particular in the DSCH processing section 500 and the macro diversity processing section 505. In this case, case A of FIG. 12A is employed as the signaling method.

[0127] When the DSCH processing section 500 receives data from the core network 100 (processing step P40, Yes), the channel ID of the received data is extracted (processing step P41). The DSCH processing section 500 checks for the existence of the channel ID extracted in the processing step P41 in the multicast setting table 502 (processing step P42) by referencing this multicast setting ta...

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Abstract

A system for mobile communication includes a base station and a mobile station. The base station includes a first transmitting unit operable to transmit to a mobile station, identifying information for multicast data to be to the mobile station, and a second transmitting unit operable to transmit the data on a shared channel to the mobile station, wherein the data is identified by the information transmitted. The mobile station includes a first receiving unit operable to receive from the base station identifying information for the multicast data, and a second receiving unit operable to receive the data on the shared channel from the base station, by the information received.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional of U.S. application Ser. No. 10 / 999,206, filed Nov. 24, 2004, which is a continuation of International Application No. PCT / JP02 / 05340, filed May 31, 2002, which are hereby incorporated by reference herein in their entirety.TECHNICAL FIELD [0002] The present invention relates to a communication method and device in a mobile communication system using a downlink shared channel (DSCH). BACKGROUND ART [0003] In recent years, development of CDMA (Code Division Multiple Access) communication systems has proceeded apace, and the need to shift to Wideband-CDMA (W-CDMA) systems that provide a wider bandwidth than previously in order to exchange not merely voice but also large-capacity data such as images or video at high speed, and with high quality and efficiency has increased. [0004] Communication systems adapted to these demands are generally called third generation mobile communication systems and the standar...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04Q7/24H04J3/00H04W4/06H04W72/04H04W72/12
CPCH04W4/06H04W72/005H04W72/1289H04W72/1268H04W72/042H04W72/30H04W72/23
Inventor IKEDA, EIJIKUMAGAI, TOMONORITOMITA, TETSUOKOBAYASHI, KAZUNARI
Owner FUJITSU LTD