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Mobile communication system and distribution broadcasting information control method for such system

A mobile communication system, a technology for broadcasting information, applied in the field of mobile communication systems, and can solve problems such as load increase

Inactive Publication Date: 2002-09-18
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the conventional system has a problem that the load concentrated on the RNC increases as the number of base stations controlled by the RNC increases

Method used

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  • Mobile communication system and distribution broadcasting information control method for such system
  • Mobile communication system and distribution broadcasting information control method for such system
  • Mobile communication system and distribution broadcasting information control method for such system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Fig. 2 is a block diagram showing an embodiment 1 implementing broadcast information control according to the present invention in an IP network.

[0041] node

[0042] Each base station sends its own system information to all base stations using a multicast address. Each base station generates its broadcast information based on the system information of other base stations and its own system information.

Embodiment 2

[0044] Fig. 3 is a block diagram showing an embodiment 2 implementing broadcast information control according to the present invention in an IP network.

[0045] In this second embodiment, each base station has an IP address and a base station multicast address, just like in the aforementioned embodiment 1.

[0046] Each base station sends its own system information using the multicast address. In this case, the transmitted data packet includes a hop number field, where a hop number range value is set at the time of transmission to control the coverage of the data packet.

[0047] FIG. 4A shows the format of a multicast data packet, and FIG. 4B shows the operation flow when the base station receives the multicast data packet. This operation is performed by the data processing unit in each base station. More specifically, after receiving the data packet, each base station detects the value of the hop number field of the received multicast data packet in step S1. When the val...

Embodiment 3

[0051] Fig. 5 is a block diagram showing an embodiment 3 implementing broadcast information control according to the present invention in an IP network.

[0052] In Embodiment 3, each base station has an IP address and a base station multicast address, as described in Embodiment 1 above.

[0053]Each base station sends its own system information using the multicast address. In this case, the transmission packet includes latitude and longitude information about a source base station, so that the coverage of the data packet can be controlled by a desired data packet acceptance coverage value (Ddesire) set at the time of transmission.

[0054] FIG. 6A shows a format of a multicast data packet, and FIG. 6B shows the operation flow when the base station receives the multicast data packet. This operation is performed by a data processing unit in each base station. More specifically, after receiving the data packet, in step S11, each base station calculates the distance between the...

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Abstract

A mobile communication system can implement broadcast control that autonomously generates broadcast information in a distributed manner, thereby avoiding the need for an RNC (Radio Network Controller). Each base station has an IP address and a base station multicast address. Each base station sends its own system information to all base stations using this multicast address. Each base station generates its broadcast information based on its own system information and system information received from other base stations. In this way, it can autonomously generate broadcast information in a distributed manner without using RNC.

Description

technical field [0001] The present invention relates to a mobile communication system, and a distributed broadcast information control method in the mobile communication system, characterized in that the broadcast information control in the mobile communication system, the mobile communication system transmits information from a base station through a wireless channel Communication services are provided to a mobile station. Background technique [0002] In a mobile communication system, a base station periodically transmits different types of broadcast information, such as adjustment information and available channel information for each area, to a mobile station through a broadcast channel. Receiving such broadcast information, the mobile station can know the current state of the mobile communication system. As an example of broadcast information, FIG. 1 shows the contents of a broadcast information message defined in a PDC (Personal Digital Cellular) system. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W80/04H04W92/20
CPCH04W80/04H04W92/20H04W72/30
Inventor 池田武弘冈岛一郎梅田成视
Owner NTT DOCOMO INC