RADIO BASE STATION APPARATUS AND BASE STATION CONTROLLER

• US 20100177729A1
• Filed: 02/02/2010
• Published: 07/15/2010
• Est. Priority Date: 03/25/2003
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: TAJIMA, Yoshiharu
• Granted Patent: US 7,924,790 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 36/00692 using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] allocation of physical resources in CoMP or in CA H04L5/0035
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The invention provides a radio base station apparatus forming a wireless zone in a mobile communication system and to a base station controller performing channel control over a terminal visiting a wireless zone. The radio base station apparatus has an identifying section identifying a particular radio base station that is to maintain a radio channel between the radio base station apparatus and a terminal during a process of diversity handover, a network interface section delivering a signal to a network if a local station is not the particular radio base station, and an inter-office interface section delivering to the network a composite wave of the signal and a signal having arrived and forwarded from the terminal via the radio channel at a radio base station forming a wireless zone adjacent to a wireless zone formed by the local station if the local station is the particular radio base station.

Claims

1. A radio communication method comprising:

transmitting data and identification information allotted to a radio terminal to the radio terminal from a first and a second radio base stations in a diversity transmission manner; and

transmitting the data and a renewal identification information different from the identification information to the radio terminal from a third base station when the radio terminal moves from an area of the first and second base station to an area of a third base station.

3. The radio communication method according to claim 1, wherein the identification information is an IP address.

4. The radio communication method according to claim 1, wherein the renewed identification information is different from the identification information before the renewal.

5. The radio communication method according to claim 1, wherein

the first radio base station transmits primary information and the second radio base station transmits secondary information, the primary information and the secondary information including same content information,

the radio terminal in diversity receives the primary information and the secondary information, and

the third radio base station transmits information without forming diversity transmission relation with the first radio base station for transmission of the information.

6. The radio communication method according to claim 5, wherein the identification information and the renewed identification information are unique.

2. A radio communication method comprising:

maintaining identification information allotted to a radio terminal for receiving data without renewing the identification information when the radio terminal moves from an area of a first radio base station to an area of a second radio base station, and transmitting data and the identification information to the radio terminal from the first and second radio base stations in a diversity transmission manner; and

renewing the identification information when the radio terminal moves to an area of a third base station, and transmitting data and the renewed identification information to the radio terminal from the third radio base station, wherein

the third base station belongs to a mobile zone which is different from a mobile zone which the first and second base stations using the diversity transmission manner belong to.

7. A radio system performing radio communication with a radio terminal comprising:

a first transmitting unit transmitting data and identification information allotted to the radio terminal to the radio terminal from a first and a second radio base stations in a diversity transmission manner; and

a second transmitting unit transmitting the data and a renewal identification information different from the identification information to the radio terminal from a third base station when the radio terminal moves from an area of the first and second base station to an area of a third base station.

9. The radio system according to claim 7, wherein the identification information is an IP address.

10. The radio system according to claim 7, wherein the renewed identification information is different from the identification information before the renewal.

11. The radio system according to claim 7, wherein

the first radio base station transmits primary information and the second radio base station transmits secondary information, the primary information and the secondary information including same content information,

the radio terminal in diversity receives the primary information and the secondary information, and

the third radio base station transmits information without forming diversity transmission relation with the first radio base station for transmission of the information.

12. The radio system according to claim 11, wherein the identification information and the renewed identification information are unique.

8. A radio system performing radio communication with a radio terminal comprising:

a second radio base station maintaining identification information allotted to the radio terminal for receiving data without renewing the identification information when the radio terminal moves from an area of a first radio base station to an area of the second radio base station, and transmitting data and the identification information to the radio terminal from the first and second radio base stations in a diversity transmission manner; and

a third base station renewing the identification information when the radio terminal moves to an area of the third base station, and transmitting data and the renewed identification information to the radio terminal from the third radio base station, wherein

the third base station belongs to a mobile zone which is different from a mobile zone which the first and second base stations using the diversity transmission manner belong to.

13. A radio terminal performing radio communication with radio base stations comprising:

a first transmitting unit transmitting data and identification information allotted to the radio terminal to the radio terminal from a first and a second radio base stations in a diversity transmission manner; and

a second transmitting unit transmitting the data and a renewal identification information different from the identification information to the radio terminal from a third base station when the radio terminal moves from an area of the first and second base station to an area of a third base station.

15. The radio terminal according to claim 13, wherein the identification information is an IP address.

16. The radio terminal according to claim 13, wherein the renewed identification information is different from the identification information before the renewal.

17. The radio terminal according to claim 13, wherein

the first radio base station transmits primary information and the second radio base station transmits secondary information, the primary information and the secondary information including same content information,

the radio terminal in diversity receives the primary information and the secondary information, and

the third radio base station transmits information without forming diversity transmission relation with the first radio base station for transmission of the information.

18. The radio terminal according to claim 17, wherein the identification information and the renewed identification information are unique.

14. A radio terminal performing radio communication with radio base stations comprising:

a second radio base station maintaining identification information allotted to the radio terminal for receiving data without renewing the identification information when the radio terminal moves from an area of a first radio base station to an area of the second radio base station, and transmitting data and the identification information to the radio terminal from the first and second radio base stations in a diversity transmission manner; and

a third base station renewing the identification information when the radio terminal moves to an area of the third base station, and transmitting data and the renewed identification information to the radio terminal from the third radio base station, wherein

the third base station belongs to a mobile zone which is different from a mobile zone which the first and station base stations using the diversity transmission manner belong to.