# US 2018/0160401 A1 · Terminal device and base station device

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- Number: US 2018/0160401 A1
- Document ID: US20180160401A1
- Status: Published application
- Kind: A1
- Application number: 15/568,412
- Filed: 2016-04-14
- Published: 2018-06-07
- Earliest claimed: 2015-04-20
- Assignees: Shark
- Applicants: Sharp Kabushiki Kaisha
- Inventors: JUNGO GOTO; OSAMU NAKAMURA; YASUHIRO HAMAGUCHI
- Web page: https://patentgrep.com/patent/US20180160401A1

## CPC

- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04J 11/0036: {at the receiver}
- H04L 1/0048: {in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder (for spatial equalizer H04L25/03286)}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0062: {Avoidance of ingress interference, e.g. ham radio channels}
- H04L 5/04: the signals being represented by different amplitudes or polarities, e.g. quadriplex
- H04L 25/0224: {using sounding signals}
- H04L 25/03: Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L 25/067: {providing soft decisions, i.e. decisions together with an estimate of reliability (H04L25/068 and H04L25/069 take precedence; sequence estimation techniques H04L25/03178)}
- H04L 27/00: Modulated-carrier systems
- H04W 72/541: using the level of interference
- H04B 1/10: Means associated with receiver for limiting or suppressing noise or interference
- H04B 1/40: Circuits
- H04W 72/51: based on terminal or device properties
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- 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)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

In a base station device for transmitting data signals to a plurality of terminal devices, the base station device includes a signal multiplexing unit that multiplexes data signals for at least a first terminal device and a second terminal device, a control information generation unit that generates, for the first terminal device, control information containing information related to the data signal destined for the second terminal device, and a radio receiving unit that receives information of a reception processing capability of each terminal device. The information of the reception processing capability is information indicating whether the terminal device executes error correction decoding of an interference signal when the terminal device detects the multiplexed data signals, and the information related to the data signal destined for the second terminal device and contained in the control information is generated by the control information generation unit to be different depending on the received information of the reception processing capability.

## Claims

### Claim at position 1

-14. (canceled)

### Claim 15

A base station device for communicating with a terminal device, the base station device comprising:
a control information generation unit that generates radio resource control (RRC) in a radio resource and downlink control information (DCI); and
a transmission processing unit that transmits the RRC and the DCI,
wherein after making setting about superposition coding of a plurality of users with the RRC, the control information generation unit generates the DCI by adding information about the superposition coding of the plurality of users to a predetermined DCI format, and
the information to be added indicates at least one of information about transmission power, existence of interference and a modulation scheme of the interference.

### Claim 16 (depends on 15)

The base station device according to claim 15,
wherein the DCI format that is different depending on a transmission mode is used for the predetermined DCI format, and the number of bits to be added is different depending on the DCI format.

### Claim 17 (depends on 15)

The base station device according to claim 15,
wherein in a case where the information to be added indicates the information about the transmission power and in a case where the information about the transmission power indicates a certain specific value, a transmitted signal is generated regardless of the superposition coding; and in a case where the information about the transmission power indicates a value other than the certain specific value, the transmitted signal is generated using power indicated by the value.

### Claim 18 (depends on 15)

The base station device according to claim 15,
wherein the existence of the interference indicates whether or not the superposition coding is performed.

### Claim 19 (depends on 15)

The base station device according to claim 15,
wherein the predetermined DCI format is transmitted only with a UE-specific search space.

### Claim 20

A terminal device for communicating with a base station device, the terminal device comprising:
a reception processing unit that receives radio resource control (RRC) in setting about superposition coding of a plurality of users in a radio resource and downlink control information (DCI) indicating resource allocation for receiving PDSCH,
a control information detection unit that detects information related to a data signal contained in the DCI, and
a signal detection unit that detects the data signal transmitted via PDSCH,
wherein after making setting about the superposition coding of the plurality of users with the RRC, the control information detection unit judges that information of a predetermined number of bits about the superposition coding of the plurality of users is added to a predetermined DCI, and
the added information is at least one of information about transmission power, existence of interference and a modulation scheme of the interference.

### Claim 21 (depends on 20)

The terminal device according to claim 20,
wherein in a case where the added information indicates the information about the transmission power and in a case where the information about the transmission power indicates a certain specific value, demodulation is executed without using the transmission power indicated by the added information; and in a case where the information about the transmission power indicates a value other than a certain specific value, the demodulation is executed using the transmission power indicated by the added information.

### Claim 22 (depends on 20)

The terminal device according to claim 20,
wherein the existence of the interference indicates whether or not the superposition coding is performed, and in a case where the existence of the interference indicates that the superposition coding is performed, the interference is removed using the added information.