Reference signal port indication techniques
Techniques are described to indicate reference signal port. An example wireless communication method includes determining, by a communication device, a demodulation reference signal (DMRS) port and at least one type of an orthogonal code; and receiving, by the communication device at the DMRS port, a DMRS based on the at least one type of the orthogonal code.
1 . A wireless communication method, comprising:
determining, by a communication device, a demodulation reference signal (DMRS) port and at least one type of an orthogonal code,
wherein the at least one type of the orthogonal code is determined based on an indication of the DMRS port received by the communication device,
wherein DMRS ports with different types of frequency division orthogonal cover code (FD-OCC) are mapped on resources in one physical resource block (PRB) in frequency domain, and
wherein the DMRS ports with different types of FD-OCC include the received DMRS port; and
receiving, by the communication device at the DMRS port, a DMRS based on the at least one type of the orthogonal code.
2 . The method of claim 1 , wherein the resources include:
different physical resource block groups (PRGs),
scheduled PRBs for the communication device,
a set of PRBs without PRB bundling, or
partial resource elements (REs) on a set of PRBs without PRB bundling.
3 . The method of claim 1 , wherein a DMRS port with frequency division orthogonal cover code (FD-OCC) of length of 4 on resources include any one of:
puncturing on the resources, or
a plurality of DMRS ports on the resources are associated with a FD-OCC of length 2 as a same DMRS port, or
using associated FD-OCC of length 2.
4 . The method of claim 3 ,
wherein the plurality of DMRS ports on the resources are associated with a FD-OCC of length 2 as a same DMRS port,
wherein an index of the DMRS port is 0 to 3 for a single symbol DMRS, or
wherein the index of the DMRS port is 0 to 7 for a double symbol DMRS.
5 . The method of claim 3 ,
wherein an index of the DMRS port is larger than 3 for a single symbol DMRS, or
wherein the index of the DMRS port is larger than 7 for a double symbol DMRS.
6 . The method of claim 5 , wherein two values of a second OCC are associated with any two of four values of a first OCC.
7 . The method of claim 6 , wherein the two values of the second OCC are one of:
first two values of the four values of the first OCC, or
last two values of the four values of the first OCC.
8 . A wireless communication method, comprising:
transmitting, by a network device, a demodulation reference signal (DMRS) at a DMRS port, wherein the DMRS is based on at least one type of an orthogonal code,
wherein the at least one type of the orthogonal code is based on an indication of the DMRS port transmitted to a communication device,
wherein DMRS ports with different types of frequency division orthogonal cover code (FD-OCC) are mapped on resources in one physical resource block (PRB) in frequency domain, and
wherein the DMRS ports with different types of FD-OCC include the received DMRS port.
9 . The method of claim 8 , wherein the resources include:
different physical resource block groups (PRGs),
scheduled PRBs for the communication device,
a set of PRBs without PRB bundling, or
partial resource elements (REs) on a set of PRBs without PRB bundling.
10 . The method of claim 8 , wherein a DMRS port with frequency division orthogonal cover code (FD-OCC) of length of 4 on resources include any one of:
puncturing on the resources, or
a plurality of DMRS ports on the resources associated with a FD-OCC of length 2 as a same DMRS port, or
using associated FD-OCC of length 2.
11 . The method of claim 10 ,
wherein the plurality of DMRS ports on the resources are associated with a FD-OCC of length 2 as a same DMRS port,
wherein an index of the DMRS port is 0 to 3 for a single symbol DMRS, or
wherein the index of the DMRS port is 0 to 7 for a double symbol DMRS.
12 . The method of claim 10 ,
wherein an index of the DMRS port is larger than 3 for a single symbol DMRS, or
wherein the index of the DMRS port is larger than 7 for a double symbol DMRS.
13 . The method of claim 12 , wherein two values of a second OCC are associated with any two of four values of a first OCC.
14 . The method of claim 13 , wherein the two values of the second OCC are one of:
first two values of the four values of the first OCC, or
last two values of the four values of the first OCC.
15 . An apparatus of a communication device for wireless communication comprising: at least one processor, configured to implement a method, the at least one processor configured to cause the apparatus to:
determine, by the communication device, a demodulation reference signal (DMRS) port and at least one type of an orthogonal code,
wherein the at least one type of the orthogonal code is determined based on an indication of the DMRS port received by the communication device,
wherein DMRS ports with different types of frequency division orthogonal cover code (FD-OCC) are mapped on resources in one physical resource block (PRB) in frequency domain, and
wherein the DMRS ports with different types of FD-OCC include the received DMRS port; and
receive, by the communication device at the DMRS port, a DMRS based on the at least one type of the orthogonal code.
16 . The apparatus of claim 15 , wherein the resources include:
different physical resource block groups (PRGs),
scheduled PRBs for the communication device,
a set of PRBs without PRB bundling, or
partial resource elements (REs) on a set of PRBs without PRB bundling.
17 . The apparatus of claim 15 , wherein a DMRS port with frequency division orthogonal cover code (FD-OCC) of length of 4 on resources include any one of:
puncturing on the resources, or
a plurality of DMRS ports on the resources are associated with a FD-OCC of length 2 as a same DMRS port, or
using associated FD-OCC of length 2.
18 . An apparatus of a network device for wireless communication comprising: at least one processor, configured to implement a method, the at least one processor configured to cause the apparatus to:
transmit, by the network device, a demodulation reference signal (DMRS) at a DMRS port,
wherein the DMRS is based on at least one type of an orthogonal code,
wherein the at least one type of the orthogonal code is based on an indication of the DMRS port transmitted to a communication device,
wherein DMRS ports with different types of frequency division orthogonal cover code (FD-OCC) are mapped on resources in one physical resource block (PRB) in frequency domain, and
wherein the DMRS ports with different types of FD-OCC include the received DMRS port.
19 . The apparatus of claim 18 , wherein the resources include:
different physical resource block groups (PRGs),
scheduled PRBs for the communication device,
a set of PRBs without PRB bundling, or
partial resource elements (REs) on a set of PRBs without PRB bundling.
20 . The apparatus of claim 18 , wherein a DMRS port with frequency division orthogonal cover code (FD-OCC) of length of 4 on resources include any one of:
puncturing on the resources, or
a plurality of DMRS ports on the resources are associated with a FD-OCC of length 2 as a same DMRS port, or
using associated FD-OCC of length 2.