Methods and devices for reference signal configuration
Embodiments of the present disclosure relate to methods and devices for reference signal (RS) transmission. In example embodiments, a method implemented in a network device is provided. According to the method, one or more RS patterns are determined for a plurality of RS ports. A RS pattern indicates a configuration of a RS to be transmitted to a terminal device via one or more RS ports. Afterwards, information of the RS patterns is transmitted to the terminal device.
1. A network device comprising a processor configured to:
determine an initial value for generating an DeModulation Reference Signal (DMRS) sequence based on an index of an DMRS port group;
transmit, to a terminal, information on the initial value; and
transmit, to the terminal, the DMRS sequence via an DMRS port,
wherein the DMRS port is included in the DMRS port group, and
wherein different DMRS sequences for more than one DMRS port group are used for one Physical Downlink Shared Channel (PDSCH) or one Physical Uplink Shared Channel (PUSCH).
2. The network device according to claim 1 , wherein
DMRS ports included in the DMRS port group are Quasi Co Located (QCLed).
3. The network device according to claim 1 ,
wherein the processor configured to:
determine the initial value based on a slot index, and
wherein
a range of the slot index is an integer from 0 to 9 for a value of subcarrier spacing being 15 kHz,
the range of the slot index is an integer from 0 to 19 for a value of subcarrier spacing being 30 kHz,
the range of the slot index is an integer from 0 to 39 for a value of subcarrier spacing being 60 kHz,
the range of the slot index is an integer from 0 to 79 for a value of subcarrier spacing being 120 kHz, or
the range of the slot index is an integer from 0 to 159 for a value of subcarrier spacing being 240 kHz.
4. A terminal comprising a processor configured to:
receive, from a network device, information on an initial value for generating an DeModulation Reference Signal (DMRS) sequence;
receive, from the network device, the DMRS sequence via an DMRS port; and
demodulate the DMRS sequence based on the initial value determined based on an index of an DMRS port group,
wherein the DMRS port is included in the DMRS port group, and
wherein different DMRS sequences for more than one DMRS port group are used for one Physical Downlink Shared Channel (PDSCH) or one Physical Uplink Shared Channel (PUSCH).
5. The terminal according to claim 4 , wherein
DMRS ports included in the DMRS port group are Quasi Co Located (QCLed).
6. The terminal according to claim 4 , wherein
the initial value is determined based on a slot index, and
wherein
a range of the slot index is an integer from 0 to 9 for a value of subcarrier spacing being 15 kHz,
the range of the slot index is an integer from 0 to 19 for a value of subcarrier spacing being 30 kHz,
the range of the slot index is an integer from 0 to 39 for a value of subcarrier spacing being 60 kHz,
the range of the slot index is an integer from 0 to 79 for a value of subcarrier spacing being 120 kHz, or
the range of the slot index is an integer from 0 to 159 for a value of subcarrier spacing being 240 kHz.
7. A method comprising:
determining an initial value for generating an DeModulation Reference Signal (DMRS) sequence based on an index of an DMRS port group;
transmitting information on the initial value; and
transmitting the DMRS sequence via an DMRS port,
wherein the DMRS port is included in the DMRS port group, and
wherein different DMRS sequences for more than one DMRS port group are used for one Physical Downlink Shared Channel (PDSCH) or one Physical Uplink Shared Channel (PUSCH).
8. The method according to claim 7 , wherein
DMRS ports included in the DMRS port group are Quasi Co Located (QCLed).
9. The method according to claim 7 , further comprising
determining the initial value based on a slot index, and
wherein
a range of the slot index is an integer from 0 to 9 for a value of subcarrier spacing being 15 kHz,
the range of the slot index is an integer from 0 to 19 for a value of subcarrier spacing being 30 kHz,
the range of the slot index is an integer from 0 to 39 for a value of subcarrier spacing being 60 kHz,
the range of the slot index is an integer from 0 to 79 for a value of subcarrier spacing being 120 kHz, or
the range of the slot index is an integer from 0 to 159 for a value of subcarrier spacing being 240 kHz.
10. A method comprising:
receiving information on an initial value for generating an DeModulation Reference Signal (DMRS) sequence;
receiving the DMRS sequence via an DMRS port; and
demodulating the DMRS sequence based on the initial value determined based on DMRS ports included in the DMRS port group,
wherein the DMRS port is included in the DMRS port group, and
wherein different DMRS sequences for more than one DMRS port group are used for one Physical Downlink Shared Channel (PDSCH) or one Physical Uplink Shared Channel (PUSCH).
11. The method according to claim 10 , wherein
DMRS ports included in the DMRS port group are Quasi Co Located (QCLed).
12. The method according to claim 10 , wherein
the initial value is determined based on the slot index, and
wherein
a range of the slot index is an integer from 0 to 9 for a value of subcarrier spacing being 15 kHz,
the range of the slot index is an integer from 0 to 19 for a value of subcarrier spacing being 30 kHz,
the range of the slot index is an integer from 0 to 39 for a value of subcarrier spacing being 60 kHz,
the range of the slot index is an integer from 0 to 79 for a value of subcarrier spacing being 120 kHz, or
the range of the slot index is an integer from 0 to 159 for a value of subcarrier spacing being 240 kHz.