RELAY STATION APPARATUS, MULTIHOP SYSTEM AND RELAYING METHOD

• US 20110069655A1
• Filed: 04/20/2009
• Published: 03/24/2011
• Est. Priority Date: 05/29/2008
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ikeda, Tetsu
• Application Number:
  US12/993,131
• Publication Number:
  US 20110069655A1
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A relay station apparatus includes a first transmission/receiving means and second transmission/receiving means. The first transmission/receiving means exchanges a first relay link signal transmitted/received by a superordinate apparatus, with the superordinate apparatus and exchanges part of the first relay link signal as a second access link signal or a second relay link signal, with a subordinate apparatus. The second transmission/receiving means exchanges the other part of the first relay link signal, which the first transmission/receiving means exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, with a subordinate apparatus.

Claims

1. A relay station apparatus comprising:

a first transmission/receiving unit that exchanges a first relay link signal transmitted/received by a superordinate apparatus, with the superordinate apparatus and exchanges part of the first relay link signal as a second access link signal or a second relay link signal, with a subordinate apparatus; and

,

a second transmission/receiving unit that exchanges the other part of the first relay link signal, which the first transmission/receiving unit exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, with a subordinate apparatus.

2. The relay station apparatus according to claim 1, wherein the first relay link signal transmitted/received by the superordinate apparatus and the first access link signal which the superordinate apparatus directly exchanges with a subordinate apparatus are time-division multiplexed so as to be allocated to zones each different from the other, and,

the first transmission/receiving unit transmits/receives the second access link signal or the second relay link signal, in the zone in which the superordinate apparatus transmits/receives the first access link signal.

3. The relay station apparatus according to claim 1, wherein the first transmission/receiving unit and the second transmission/receiving unit demodulate a received signal and modulate a signal to be transmitted based on an adaptive modulation scheme.

4. The relay station apparatus according to claim 1, wherein the same frequency is used in the first transmission/receiving unit and the second transmission/receiving unit.

5. A multihop system comprising:

a base station apparatus that transmits/receives a relay link signal for establishing connection with a terminal apparatus in multihops;

a relay station apparatus including a first transmission/receiving unit and a second transmission/receiving unit, the first transmission/receiving unit exchanging a first relay link signal with the base station apparatus or another relay station as a superordinate apparatus and exchanging part of the first relay link signal as a second access link signal or a second relay link signal, with a terminal apparatus or another relay station as a subordinate apparatus, and, the second transmission/receiving unit exchanging the other part of the first relay link signal, which the first transmission/receiving unit exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, with a subordinate apparatus.

6. The multihop system according to claim 5, wherein the first relay link signal transmitted/received by the superordinate apparatus and the first access link signal which the superordinate apparatus transmits or receives are time-division multiplexed so as to be allocated to zones each different from the other, and,

the first transmission/receiving unit transmits/receives the second access link signal or the second relay link signal, in the zone in which the superordinate apparatus transmits and receives the first access link signal.

7. The multihop system according to claim 5, wherein the first transmission/receiving unit and the second transmission/receiving unit demodulate a received signal and modulate a signal to be transmitted based on an adaptive modulation scheme.

8. The multihop system according to claim 5, wherein the same frequency is used in the first transmission/receiving unit and the second transmission/receiving unit.

9. A relaying method in a relay station apparatus of a multihop system for connecting between a base station apparatus and a terminal apparatus in multihops, comprising the steps of:

by means of a first transmission/receiving unit provided for the relay station apparatus, exchanging a first relay link signal that is transmitted or received by the base station apparatus or another relay station as a superordinate apparatus, with the superordinate apparatus and exchanging part of the first relay link signal as a second access link signal or a second relay link signal, with a terminal apparatus or another relay station as a subordinate apparatus, and,

by means of a second transmission/receiving unit provided for the relay station apparatus, exchanging the other part of the first relay link signal, which the first transmission/receiving unit exchanges with the superordinate apparatus, as a third access link signal or a third relay link signal, with a subordinate apparatus.

10. The relaying method according to claim 9, wherein the first relay link signal transmitted/received by the superordinate apparatus and the first access link signal which the superordinate apparatus transmits or receives are time-division multiplexed so as to be allocated to zones each different from the other, and,

the first transmission/receiving unit transmits/receives the second access link signal or the second relay link signal, in the zone in which the superordinate apparatus transmits/receives the first access link signal.

11. The relaying method according to claim 9, wherein the first transmission/receiving unit and the second transmission/receiving unit demodulate a received signal and modulate a signal to be transmitted based on an adaptive modulation scheme.

12. The relaying method according to claim 9, wherein the same frequency is used in the first transmission/receiving unit and the second transmission/receiving unit.