MOBILE COMMUNICATIONS SYSTEM, BASE STATION, USER APPARATUS, AND METHOD

• US 20100046403A1
• Filed: 08/13/2007
• Published: 02/25/2010
• Est. Priority Date: 08/22/2006
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Kishiyama, Yoshihisa, Higuchi, Kenichi, Sawahashi, Mamoru
• Application Number:
  US12/438,107
• Publication Number:
  US 20100046403A1
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A mobile communications system is disclosed. The mobile communications system includes: a first user apparatus for two-way communicating using frequency division duplex (FDD); a second user apparatus for two-way communicating using time division duplex (TDD); and a base station for communicating with the first and second user apparatuses. The base station distinguishes among the simultaneous transmitting and receiving schemes of the user apparatuses based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme that is included in an uplink control channel, or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme.

Claims

1. A mobile communications system, comprising:

a first user apparatus which conducts a two-way communication using frequency division duplex (FDD);

a second user apparatus which conducts a two-way communication using time division duplex (TDD); and

a base station which communicates with the first and second user apparatuses, wherein

the base station distinguishes among simultaneous transmitting and receiving schemes of the user apparatuses based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme included in an uplink control channel;

or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme.

2. The mobile communications system as claimed in claim 1, wherein the base station includes a scheduler which plans allocating a radio resource to a packet of the first and second user apparatuses, and a unit which reports, to the first and second user apparatuses, scheduling information indicating a status of allocating of the radio resource, wherein

the scheduling information of the second user apparatus is created such that uplink and downlink transmission timings differ.

3. The mobile communications system as claimed in claim 2, wherein

the scheduler plans allocating the radio resource to the second user apparatus, and allocates another radio resource to the first user apparatus.

4. A base station which is used in a mobile communications system, the base station communicating with a first user apparatus which conducts a two-way communication using frequency division duplex (FDD), and a second user apparatus which conducts a two-way communication using frequency division duplex/time division duplex (FDD/TDD), wherein

a simultaneous transmitting and receiving scheme of the user apparatuses is distinguished based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme included in an uplink control channel, or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme.

5. The base station as claimed in claim 4, further including:

a scheduler which plans allocating a radio resource to a packet of the first and second user apparatuses, wherein

scheduling information for the second user apparatus is created such that transmit timings for the uplink and downlink differ.

6. The mobile communications system as claimed in claim 5, wherein

the scheduler plans allocating the radio resource to the second user apparatus, and allocates another radio resource to the first user apparatus.

7. A user apparatus which is used in a mobile communications system having a base station which communicates with user apparatuses of different simultaneous transmitting and receiving schemes, wherein an uplink control channel is transmitted which includes flag information indicating whether each of the simultaneous transmitting and receiving schemes is frequency division duplex (FDD) or frequency division duplex/time division duplex (FDD/TDD).

8. A method which is used in a mobile communications system which includes a first user apparatus which conducts a two-way communication using frequency division duplex (FDD), a second user apparatus which conducts a two-way communication using time division duplex (TDD), and a base station which communicates with the first and second user apparatuses, comprising the steps of:

by the base station, distinguishing among simultaneous transmitting and receiving schemes of the user apparatuses based on user-apparatus specific user identification information, flag information showing a simultaneous transmitting and receiving scheme included in an uplink control channel;

or signatures, a proper use of which is made according to the simultaneous transmitting and receiving scheme; and

by the base station, planning to allocate a radio resource to the second user apparatus, and allocating another radio resource to the first user apparatus; and

reporting, to the first and second user apparatuses, scheduling information showing a status of allocating of the radio resources.