Terminal and communication method for inter-device direct communication

Patent metadata

Field	Value
Publication number	US-12082083-B2
Application number	US-201817265365-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 9, 2018
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

A user equipment includes a reception unit that receives control information and data through inter-terminal direct communication; and a control unit that determines, based on the control information or the data, whether the inter-terminal direct communication is unicast, groupcast, or broadcast.

First claim

The invention claimed is:

1. A terminal for transmitting physical layer control information and data via a sidelink shared channel for inter-terminal direct communication, the terminal comprising:
a processor that sets, from among a unicast, a groupcast, and a broadcast, the broadcast in the physical layer control information to be transmitted via the sidelink shared channel, as a cast type of the data; and
a transmitter that transmits the physical layer control information via the sidelink shared channel and that transmits the data via the sidelink shared channel based on the cast type,
wherein the physical layer control information transmitted via the sidelink shared channel for the inter-terminal direct communication is different from a signal of a Medium Access Control (MAC) layer,
wherein the transmitter transmits the physical layer control information and the data at a same timing via the sidelink shared channel through a plurality of antenna ports of the terminal,
wherein the processor associates the cast type with a format of the physical layer control information to be transmitted via the sidelink shared channel, the physical layer control information to be transmitted via the sidelink shared channel being different from the signal of the MAC layer, and
wherein the cast type associated with the format of the physical layer control information to be transmitted via the sidelink shared channel is the broadcast.

2. The terminal according to claim 1 , wherein the processor scrambles the data using a scrambling sequence for the data, and the processor sets the scrambling sequence for the data independently of the cast type.

3. A communication method executed by a terminal for transmitting physical layer control information and data via a sidelink shared channel for inter-terminal direct communication, the method comprising:
setting, from among a unicast, a groupcast, and a broadcast, the broadcast in the physical layer control information to be transmitted via the sidelink shared channel, as a cast type of the data; and
transmitting the physical layer control information via the sidelink shared channel and transmitting the data via the sidelink shared channel based on the cast type,
wherein the physical layer control information transmitted via the sidelink shared channel for the inter-terminal direct communication is different from a signal of a Medium Access Control (MAC) layer,
wherein the transmitting transmits the physical layer control information and the data at a same timing via the sidelink shared channel through a plurality of antenna ports of the terminal,
wherein the cast type is associated with a format of the physical layer control information to be transmitted via the sidelink shared channel, the physical layer control information to be transmitted via the sidelink shared channel being different from the signal of the MAC layer, and
wherein the cast type associated with the format of the physical layer control information to be transmitted via the sidelink shared channel is the broadcast.

Assignees

• Ntt Docomo Inc

Inventors

• Osawa Ryosuke
• Wang Huan
• Hou Xiaolin

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04W72/0466

  the resource being a scrambling code · CPC title

• H04W76/11

  Allocation or use of connection identifiers · CPC title

• H04W40/22

  using selective relaying for reaching a BTS [Base Transceiver Station] or an access point · CPC title

• H04W28/0236

  radio quality, e.g. interference, losses or delay · CPC title