# US 2020/0404546 A1 · Communication device and radio communication system

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- Number: US 2020/0404546 A1
- Document ID: US20200404546A1
- Status: Published application
- Kind: A1
- Application number: 17/013,009
- Filed: 2020-09-04
- Published: 2020-12-24
- Earliest claimed: 2018-03-06
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Osamu Tanaka; Nobuhiko Arashin; Shinichiro Nishioka
- Web page: https://patentgrep.com/patent/US20200404546A1

## CPC

- H04W 28/18: Negotiating wireless communication parameters
- H04L 1/0003: {by switching between different modulation schemes}
- H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)}
- H04L 27/00: Modulated-carrier systems
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 1/0016: {involving special memory structures, e.g. look-up tables}
- H04W 24/02: Arrangements for optimising operational condition
- H04W 72/52: based on load
- H04W 84/12: WLAN [Wireless Local Area Networks]
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A communication device for transmitting data to a plurality of radio terminals in radio communication includes: a first communication interface that performs radio communication with each of radio terminals in accordance with a first communication standard; and a controller that controls radio communication with each of the radio terminals, wherein the controller manages a modulation and coding scheme (MCS) level indicating a level of an MCS used for transmission of data for each of the radio terminals in association with a load amount indicating a communication load in the transmission of the data, wherein the controller, when detecting that the load amount is greater than a predetermined upper limit value, determines an allowable level of the MCS level corresponding to a load amount less than the upper limit value, and restricts the transmission of the data to use an MCS level equal to or higher than the allowable level.

## Claims

### Claim 1

A communication device for transmitting data to a plurality of radio terminals in radio communication, the communication device comprising:
a first communication interface that performs radio communication with each of radio terminals in accordance with a first communication standard; and
a controller that controls radio communication with each of the radio terminals,
wherein the controller manages a modulation and coding scheme (MCS) level indicating a level of an MCS used for transmission of data for each of the radio terminals in association with a load amount indicating a communication load in the transmission of the data,
wherein the controller, when detecting that the load amount is greater than a predetermined upper limit value,
determines an allowable level of the MCS level corresponding to a load amount less than the upper limit value, and
restricts the transmission of the data to use an MCS level equal to or higher than the allowable level.

### Claim 2 (depends on 1)

The communication device according to claim 1, wherein the allowable level is a minimum MCS level in MCS levels each corresponding to a load amount equal to or less than a predetermined value that is less than the upper limit value.

### Claim 3 (depends on 1)

The communication device according to claim 1, wherein the controller lowers the allowable level when detecting that the load amount is less than a lower limit value that is lower than the upper limit value.

### Claim 4 (depends on 1)

The communication device according to claim 1, wherein the first communication interface transmits a notification indicating the allowable level to each of the plurality of radio terminals by using an MCS level lower than the allowable level.

### Claim 5 (depends on 1)

The communication device according to claim 1, wherein the controller, when changing the allowable level, causes the first communication interface to transmit a notification indicating the changed allowable level.

### Claim 6 (depends on 1)

The communication device according to claim 1, wherein the first communication standard is a WiGig standard.

### Claim 7 (depends on 1)

The communication device according to claim 1, further comprising:
a second communication interface that transmits the data to an unpermitted radio terminal in the radio communication in accordance with a second communication standard different from the first communication standard, the unpermitted radio terminal being a radio terminal to which the data is not allowed to be transmitted from the first communication interface.

### Claim 8 (depends on 7)

The communication device according to claim 7, wherein the second communication standard is a WiFi standard.

### Claim 9 (depends on 1)

A radio communication system comprising:
the communication device according to claim 1; and
a radio terminal that receives the data from the communication device.