# US 9,001,708 B2 · Method in which a mobile terminal transmits/receives a signal using a predetermined TDD frame structure in a wireless communication system

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- Number: US 9,001,708 B2
- Document ID: US9001708B2
- Status: Granted
- Kind: B2
- Application number: 13/393,198
- Filed: 2010-08-30
- Published: 2012-09-13
- Granted: 2015-04-07
- Earliest claimed: 2009-08-28
- Assignees: LG Electronics Inc.
- Applicants: Dong Guk Lim; Young Soo Yuk; Jian Xu; Han Gyu Cho; Jin Young Chun; Jin Sam Kwak
- Inventors: Dong Guk Lim; Young Soo Yuk; Jian Xu; Han Gyu Cho; Jin Young Chun; Jin Sam Kwak
- Web page: https://patentgrep.com/patent/US9001708B2

## CPC

- H04B 7/2656: {for structure of frame, burst}
- H04B 7/2606: {Arrangements for base station coverage control, e.g. by using relays in tunnels}
- H04L 5/1469: {using time-sharing}
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

The mobile station for transceiving signals using a predetermined time division duplex (TDD) frame structure in a wireless communication system includes a receiver for receiving a midamble from a base station (BS), and a relay station (RS). The receiver receives, from the BS, a first midamble through a second subframe of a downlink access zone of the BS and/or through a first subframe of a downlink relay zone that follows the downlink access zone. Alternatively, the receiver receives, from the RS, a second midamble through a second subframe of a downlink access zone of the RS. A transition gap in a downlink region is located in the last subframe of the downlink access zone of the RS, which follows the downlink access zone of the RS, and a transition gap in an uplink region is located in a first subframe of an uplink relay zone of the RS.

## Claims

### Claim 1

A method for transceiving signals using a predetermined time division duplex (TDD) frame in a wireless communication system the method comprising,
transmitting, a first midamble by a base station (BS) to a mobile station (MS); and
transmitting a second midamble by the BS to a relay station (RS),
wherein the first midamble is transmitted through a downlink access zone of the BS,
wherein the second midamble is transmitted through a downlink relay zone of a specific frame of each superframe,
wherein the second midamble is transmitted through a last symbol of a first non-type-3 subframe of the downlink relay zone counting from an end of a downlink zone of the specific frame, and
wherein a channel bandwidth of the TDD frame is either 5 MHz, 10 MH or 20 MHz.

### Claim 2 (depends on 1)

The method according to claim 1, wherein a CP (Cyclic Prefix) length of each symbol corresponds to 1/16 or ⅛ of an effective symbol length in the TDD frame.

### Claim 3

A base station (BS) configured to transceive signals using a predetermined TDD frame in a wireless communication system, the BS comprising:
a transmitter configured to transmit a first midamble to a mobile station (MS) and transmit a second midamble to a relay station (RS),
wherein the first midamble is transmitted through a downlink access zone of the BS,
wherein the second midamble is transmitted through a downlink relay zone of a specific frame of each superframe,
wherein the second midamble is transmitted through a last symbol of a first non-type 3 subframe of the downlink relay zone counting from an end of a downlink zone of the specific frame, and
wherein a channel bandwidth of the TDD frame is either 5 MHz, 10 MH or 20 MHz.

### Claim 4 (depends on 3)

The BS according to claim 3, wherein a CP (Cyclic Prefix) length of each symbol corresponds to 1/16 or ⅛ of an effective symbol length in the TDD frame.

### Claim 5

A method for transceiving signals using a time division duplex (TDD) frame of the RS in a wireless communication system, the method comprising,
transmitting a first midamble by a relay station (RS) to a mobile station (MS); and
receiving a second midamble by the RS from a base station (BS),
wherein the first midamble is transmitted through a downlink access zone of the RS,
wherein the second midamble is received through a downlink relay zone of a specific frame of each superframe,
wherein the second midamble is received through a last symbol of a first non-type-3 subframe of the downlink relay zone counting from an end of a downlink zone of the specific frame, and
wherein a channel bandwidth of the TDD frame is either 5 MHz, 10 MH or 20 MHz.

### Claim 6 (depends on 5)

The method according to claim 5, wherein a CP (Cyclic Prefix) length of each symbol corresponds to 1/16 or ⅛ of an effective symbol length in the TDD frame.

### Claim 7

A relay station (RS) for transceiving signals using a time division duplex (TDD) frame of the RS in a wireless communication system, the RS comprising,
a transmitter configured to transmit a first midamble to a mobile station (MS); and
a receiver configured to receive a second midamble from a base station (BS),
wherein the first midamble is transmitted through a downlink access zone of the RS,
wherein the second midamble is received through a downlink relay zone of a specific frame of each superframe,
wherein the second midamble is received through a last symbol of a first non-type-3 subframe of the downlink relay zone counting from an end of a downlink zone of the specific frame, and
wherein a channel bandwidth of the TDD frame is either 5 MHz, 10 MH or 20 MHz.

### Claim 8 (depends on 7)

The RS according to claim 7, wherein a CP (Cyclic Prefix) length of each symbol corresponds to 1/16 or ⅛ of an effective symbol length in the TDD frame.