Mobile communication system

• US 20070173245A1
• Filed: 04/02/2007
• Published: 07/26/2007
• Est. Priority Date: 11/07/2002
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Tajima, Yoshiharu, Kawabata, Kazuo, Hamano, Yuichiro, Aoki, Nobuhisa, Sugiyama, Katsumasa, Sakai, Masashi
• Application Number:
  US11/730,482
• Publication Number:
  US 20070173245A1
• Time in Patent Office: Days
• US Class Current: 455/422.100
• CPC Class Codes: H04H 20/72 of terrestrial networks
• CPC Class Codes: H04W 36/0007 for multicast or broadcast services, e.g. MBMS multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method of transmitting a multicast or broadcast data from a plurality of base stations forming a multicast zone, which is included in a service area of a mobile communications system includes performing at a base station among a plurality of base stations a transmission of multicast or broadcast data based on a determined result.

Claims

1. A method of transmitting a multicast or broadcast data from a plurality of base stations forming a multicast zone, which is included in a service area of a mobile communications system, comprising:

performing at a base station among a plurality of base stations a transmission of multicast or broadcast data based on a determined result.

2. The method according to claim 1, wherein said a base station is single base station.

3. The method according to claim 1, wherein the determined results a determination of whether a terminal receiving broadcast or multicast services from the plurality of base stations exists, and the method further comprises:

performing the transmission of the broadcast data or multicast data if such a terminal exists.

4. The method according to claim 1, further comprising:

when a terminal receiving a supply of services exists in a region that allows services to be received from a base station of another zone and the terminal requests wireless-channel data transmission from the base station, implementing control such that the data is transmitted on the wireless channel from the base station on the basis of the request.

5. The method according to claim 1, further comprising:

detecting the existence of a terminal receiving a supply of services in a region that allows services to be received from another zone; and

implementing control such that the data is transmitted on a wireless channel from the base station of the other zone.

6. The method according to claim 5, wherein the detecting step further detects that a terminal has moved to a region that allows services to be received from another zone on the basis of a measurement report value received from the terminal.

7. The method according to claim 6, wherein the terminal transmits the measurement report value when a measurement value report condition is satisfied, this condition being that the reception quality in the other zone is continuously favorable for a fixed time or more.

8. The method according to claim 1, further comprising:

implementing control such that, when a terminal receiving a supply of services requests, from a movement-source base station, a wireless-channel data transmission of a movement-destination base station, a wireless channel from the movement-destination base station is determined on the basis of the request and the data is transmitted on the wireless channel.

9. The method according to claim 8, further comprising:

controlling the disconnection of a user data transmission path of a movement-source base station in accordance with a request from the terminal, wherein the movement-destination base station establishes an user data transmission path in a movement-destination zone with respect to the terminal on the basis of the transmission instruction and, after zone movement has completed, the terminal issues a request to stop data transmission by the movement-source base station via the movement-destination base station and the movement-source base station disconnects the user data transmission path in accordance with a disconnection instruction.

10. The method according to claim 1, further comprising:

detecting that a terminal receiving a supply of services exists in a region that allows services to be received from a neighboring zone; and

implementing control such that the data is transmitted on a wireless channel from the neighboring zone on the basis of the detection result.

11. The method according to claim 10, further comprising:

controlling the disconnection of a user data transmission path of a movement-source base station in accordance with a request from the terminal, wherein a movement-destination base station establishes the user data transmission path in the movement-destination zone with respect to the terminal on the basis of a transmission instruction and, after zone movement has completed, the terminal issues a request to stop data transmission by the movement-source base station via the movement-destination base station and the movement-source base station disconnects the user data transmission path in accordance with a disconnection instruction.

12. The method according to claim 1, wherein, when a terminal makes a request for a wireless network control device of a wireless-channel data transmission of a movement-destination base station via movement-source base station upon detecting movement to a region that allows services to be received from a neighboring zone or when it is detected that the terminal exists in the region that allows services to be received from neighboring zone, the wireless network control device establishes a user data channel between its own device and core network, determines a wireless channel of the movement-destination base station, and transmits the data received from the core network to the terminal on the wireless channel.

13. The method according to claim 12, wherein the wireless network control device disconnects the user data channel established between its own device and the core network in accordance with a request from the terminal following zone movement.