Communication method in D2D system, terminal device, and network device
View Patent ↗A communication method in a D2D system, a terminal device, and a network device, capable of avoiding interference to downlink transmission of a terminal device in a cell caused when another terminal device outside the cell uses a downlink transmission resource of the terminal device in the cell to carry out sidelink data transmission. The communication method in the D2D system includes: a first terminal device sends first indication information by means of a first physical sidelink channel, the first indication information being used for determining a time slot format of a cell in which the first terminal device is located.
1. A communication method in a device to device (D2D) system, comprising:
sending, by a first terminal device, first indication information through a first physical sidelink channel, wherein the first indication information is used for determining a slot format of a cell where the first terminal device is located; wherein the slot format of the cell where the first terminal device is located comprises:
uplink slot information and/or uplink time domain symbol information;
wherein the first indication information is used for determining uplink slot information and/or uplink symbol information, the first indication information comprises indication information for determining the uplink slot information and/or the uplink time domain symbol information, but does not comprise indication information for determining downlink slot information and/or downlink time domain symbol information;
wherein before sending, by the first terminal device, the first indication information through the first physical sidelink channel, the method further comprising:
receiving, by the first terminal device, configuration information sent by a network device, wherein the configuration information comprises at least following information parameters: period information, indication information of a number of uplink slots, reference subcarrier spacing information, and indication information of a number of uplink time domain symbols;
determining, by the first terminal device, the first indication information according to the configuration information, wherein the first indication information comprises the following information parameters: period information and indication information for determining uplink slot information.
2. The communication method of claim 1 , wherein the first indication information is further used for determining period information.
3. The communication method of claim 1 , wherein sending, by the first terminal device, the first indication information through the first physical sidelink channel comprises:
sending, by the first terminal device, the first indication information through a Physical Sidelink Broadcast Channel (PSBCH).
4. A terminal device, comprising: a processor and a transceiver, wherein
the transceiver is configured to send first indication information through a first physical sidelink channel, wherein the first indication information is used for determining a slot format of a cell where the terminal device is located; wherein the slot format of the cell where the first terminal device is located comprises:
uplink slot information and/or uplink time domain symbol information;
wherein the first indication information is used for determining uplink slot information and/or uplink symbol information, the first indication information comprises indication information for determining the uplink slot information and/or the uplink time domain symbol information, but does not comprise indication information for determining downlink slot information and/or downlink time domain symbol information;
wherein the transceiver is further configured to:
receive configuration information sent by a network device, and determine the first indication information according to the configuration information, wherein the configuration information comprises at least following information parameters: period information, indication information of a number of uplink slots, reference subcarrier spacing information, and indication information of a number of uplink time domain symbols;
the processor is specially configured to:
determine the first indication information according to the configuration information, wherein the first indication information comprises the following information parameters: period information and indication information for determining uplink slot information.
5. The terminal device of claim 4 , wherein the first indication information is further used for determining period information.
6. The terminal device of claim 4 , wherein the transceiver is specifically configured to:
send the first indication information through a Physical Sidelink Broadcast Channel (PSBCH).
7. A network device, comprising: a processor and a transceiver, wherein
the transceiver is configured to send configuration information to a first terminal device, for the first terminal device to determine first indication information according to the configuration information and to send the first indication information through a first physical sidelink channel, wherein the first indication information is used for determining a slot format of a cell where the first terminal device is located; wherein the slot format of the cell where the first terminal device is located comprises: uplink slot information and/or uplink time domain symbol information; wherein the first indication information is used for determining uplink slot information and/or uplink symbol information; wherein the configuration information comprises at least following parameters: period information, indication information of a number of uplink slots, reference subcarrier spacing information, and indication information of a number of uplink time domain symbols;
wherein the first indication information is determined by the first terminal device according to the configuration information, wherein, the first indication information comprises the following parameters: period information and indication information of a number of uplink slots.
8. The network device of claim 7 , wherein the first indication information is further used for determining period information.