# US 10,313,092 B2 · Method and apparatus for relaying data in wireless communication system based on TDD

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- Number: US 10,313,092 B2
- Document ID: US10313092B2
- Status: Granted
- Kind: B2
- Application number: 15/203,560
- Filed: 2016-07-06
- Published: 2016-10-27
- Granted: 2019-06-04
- Earliest claimed: 2008-11-11
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Byoung Hoon Kim; Yeong Hyeon Kwon; Han Byul Seo; Jae Hoon Chung; Young Woo Yun; Dae Won Lee
- Web page: https://patentgrep.com/patent/US10313092B2

## CPC

- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04B 7/155: Ground-based stations (H04B7/204 takes precedence)
- H04J 3/00: Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q)
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method and wireless station for receiving signals. The wireless station receives, from a base station, a control signal on a first subframe indicated as a downlink (DL) subframe by a time division duplex (TDD) uplink-downlink (UL-DL) subframe configuration. The control signal includes first information indicating that at least one UL subframe indicated by the TDD UL-DL subframe configuration is reconfigured as a TDD DL subframe. The wireless station receives, from the base station, DL data on a second subframe which was indicated as a TDD UL subframe by the TDD UL-DL subframe configuration but is currently reconfigured as a TDD DL subframe by the control signal. The wireless station transmits, to the base station, UL data on a TDD UL subframe except for being reconfigured as the TDD DL subframe by the control signal.

## Claims

### Claim 1

A method of receiving signals, the method comprising:
receiving, by a wireless station from a base station, a control signal,
wherein the control signal is received on a first subframe indicated as a downlink (DL) subframe by a first time division duplex (TDD) uplink-downlink (UL-DL) subframe configuration,
wherein the control signal includes a second TDD UL-DL subframe configuration,
wherein the second TDD UL-DL subframe configuration allows at least one UL subframe indicated by the first TDD UL-DL subframe configuration, except for one or more DL subframes indicated by the first TDD UL-DL subframe configuration, to be reconfigured as a TDD DL subframe, and
wherein the at least one UL subframe indicated by the first TDD UL-DL subframe configuration is different from a TDD special subframe indicated by the first TDD UL-DL subframe configuration;
receiving, by the wireless station from the base station, DL data on a second subframe which was indicated as a TDD UL subframe by the first TDD UL-DL subframe configuration but is currently reconfigured as a TDD DL subframe by the second TDD UL-DL subframe configuration of the control signal; and
transmitting, by the wireless station to the base station, a first UL data on a first TDD UL subframe,
wherein the first TDD UL subframe on which the first UL data is transmitted is different from the TDD UL subframe currently reconfigured as the TDD DL subframe by the second TDD UL-DL subframe configuration of the control signal,
wherein each of the first and second TDD UL-DL subframe configurations comprises 10 subframes, and
wherein the control signal corresponds to at least one of a physical layer signal and a radio resource control (RRC) signal.

### Claim 2 (depends on 1)

The method of claim 1, wherein each of the first and second TDD UL-DL subframe configurations corresponds to at least any one of configurations in Table 1 below, wherein ‘D’ denotes a DL subframe, ‘U’ denotes a UL subframe, and ‘S’ denotes a special subframe:
TABLE 1
UL-DL
Subframe Number
Configuration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D.

### Claim 3 (depends on 1)

The method of claim 1, wherein the second subframe, which was indicated as the TDD UL subframe by the first TDD UL-DL subframe configuration, but is currently reconfigured as the TDD DL subframe by the second TDD UL-DL subframe configuration, is not allowed for other wireless devices to perform a transmission.

### Claim 4 (depends on 1)

The method of claim 1, wherein the one or more DL subframes indicated by the first TDD UL-DL configuration are impossible to be reconfigured by the control signal.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
receiving information indicating a TDD UL subframe, which is not allowed for other wireless devices to perform the transmission.

### Claim 6

A wireless station for receiving signals, the wireless station comprising:
a transceiver; and
a processor configured to:
control the transceiver to receive, from a base station, a control signal,
wherein the control signal is received on a first subframe indicated as a downlink (DL) subframe by a first time division duplex (TDD) uplink-downlink (UL-DL) subframe configuration,
wherein the control signal includes a second TDD UL-DL subframe configuration,
wherein the second TDD UL-DL subframe configuration allows at least one UL subframe indicated by the first TDD UL-DL subframe configuration, except for one or more DL subframes indicated by the first TDD UL-DL subframe configuration, to be reconfigured as a TDD DL subframe, and
wherein the at least one UL subframe indicated by the first TDD UL-DL subframe configuration is different from a TDD special subframe indicated by the first TDD UL-DL subframe configuration,
control the transceiver to receive, from the base station, DL data on a second subframe which was indicated as a TDD UL subframe by the first TDD UL-DL subframe configuration but is currently reconfigured as a TDD DL subframe by the second TDD UL-DL subframe configuration of the control signal, and
control the transceiver to transmit, to the base station, a first UL data on a first TDD UL subframe,
wherein the first TDD UL subframe on which the first UL data is transmitted is different from the TDD UL subframe currently reconfigured as the TDD DL subframe by the second TDD UL-DL subframe configuration of the control signal,
wherein each of the first and second TDD UL-DL subframe configurations comprises 10 subframes, and
wherein the control signal corresponds to at least one of a physical layer signal and a radio resource control (RRC) signal.

### Claim 7 (depends on 6)

The wireless station of claim 6, wherein each of the first and second TDD UL-DL subframe configurations corresponds to at least any one of configurations in Table 1 below, wherein ‘D’ denotes a DL subframe, ‘U’ denotes a UL subframe, and ‘S’ denotes a special subframe:
TABLE 1
UL-DL
Subframe Number
Configuration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D.

### Claim 8 (depends on 6)

The wireless station of claim 6, wherein the second subframe, which was indicated as the TDD UL subframe by the first TDD UL-DL subframe configuration, but is currently reconfigured as the TDD DL subframe by the second TDD UL-DL subframe configuration, is not allowed for other wireless devices to perform a transmission.

### Claim 9 (depends on 6)

The wireless station of claim 6, wherein the one or more DL subframes indicated by the first TDD UL-DL configuration are impossible to be reconfigured by the control signal.