Radio base station apparatus and base station controller

• US 8,189,513 B2
• Filed: 02/28/2011
• Issued: 05/29/2012
• Est. Priority Date: 03/25/2003
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Tajima, Yoshiharu
• Primary Examiner(s): RAMPURIA, SHARAD K
• Application Number:
  US13/036,299
• Publication Number:
  US 20110170486A1
• Time in Patent Office: 456 Days
• Field of Search: 370/328, 370/331, 370/335, 370/338, 370/401, 455/561, 455436-442, 455/67.11
• US Class Current: 370/328
• 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 from a first radio base station in a diversity handover; and

transmitting the data and the same identification information to the radio terminal from a second radio base station when the radio terminal moves from an area of the first radio base station to an area of the second radio base station in the diversity handover.

2. 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, and

the radio terminal receives the primary information and the secondary information.

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

4. 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 from a first radio base station in a diversity handover; and

a second transmitting unit transmitting the data and the same identification information to the radio terminal from a second radio base station when the radio terminal moves from an area of the first radio base station to an area of the second radio base station in the diversity handover.

5. The radio system according to claim 4, wherein the identification information is an IP address.

6. The radio system according to claim 4, 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, and

the radio terminal receives the primary information and the secondary information.