Methods and apparatuses for reference signal allocation

Abstract

Embodiments of the present disclosure relate to methods and devices for reference signal allocation. In example embodiments, a method implemented in a network device is provided. According to the method, a plurality of RS configurations are determined based on at least one of the following: different RS ports, or different RS sequences of a same type. At least one first RS configuration from the plurality of RS configurations are allocated for uplink RS transmission by a terminal device served by the network device, and at least one second RS configuration from the plurality of RS configurations are allocated for downlink RS transmission by the network device.

What is claimed is: 
     
         1 . A terminal comprising a processor configured to:
 receive, from a network device, a parameter;   receive, from the network device, information on a DMRS configuration indicating DMRS port(s) and DMRS sequence(s) for a DMRS transmission; and   perform the DMRS transmission between the terminal and the network device based on the DMRS configuration, wherein   DMRS configurations are divided into groups,   a group from the groups is identified by the parameter,   the information indicates the DMRS configuration belonging to the group identified by the parameter, and   two different DMRS sequences are used for a same DMRS port for two different DMRS configurations within the group.   
     
     
         2 . The terminal according to  claim 1 , wherein
 two different DMRS sequences are generated based on different initial values.   
     
     
         3 . The terminal according to  claim 1 , wherein
 the DMRS configurations are based on a maximum number of DMRS ports.   
     
     
         4 . A network device comprising a processor configured to:
 transmit, to a terminal, a parameter;   transmit, to the terminal, information on a DMRS configuration indicating DMRS port(s) and DMRS sequence(s) for a DMRS transmission; and   perform the DMRS transmission between the terminal and the network device based on the DMRS configuration, wherein
 DMRS configurations are divided into groups, 
 a group from the groups is identified by the parameter, 
 the information indicates the DMRS configuration belonging to the group identified by the parameter, and 
 two different DMRS sequences are used for a same DMRS port for two different DMRS configurations within the group. 
   
     
     
         5 . The network device according to  claim 4 , wherein
 two different DMRS sequences are generated based on different initial values.   
     
     
         6 . The network device according to  claim 4 , wherein
 the DMRS configurations are based on a maximum number of DMRS ports.   
     
     
         7 . A method comprising:
 receiving a parameter;   receiving information on a DMRS configuration indicating DMRS port(s) and DMRS sequence(s) for a DMRS transmission; and   performing the DMRS transmission based on the DMRS configuration, wherein
 DMRS configurations are divided into groups, 
 a group from the groups is identified by the parameter, 
 the information indicates the DMRS configuration belonging to the group identified by the parameter, and 
 two different DMRS sequences are used for a same DMRS port for two different DMRS configurations within the group. 
   
     
     
         8 . The method according to  claim 7 , wherein
 two different DMRS sequences are generated based on different initial values.   
     
     
         9 . The method according to  claim 7 , wherein
 the DMRS configurations are based on a maximum number of DMRS ports.   
     
     
         10 . A method comprising:
 transmitting a parameter;   transmitting information on a DMRS configuration indicating DMRS port(s) and DMRS sequence(s) for a DMRS transmission; and   performing the DMRS transmission based on the DMRS configuration, wherein
 DMRS configurations are divided into groups, 
 a group from the groups is identified by the parameter, 
 the information indicates the DMRS configuration belonging to the group identified by the parameter, and 
 two different DMRS sequences are used for a same DMRS port for two different DMRS configurations within the group. 
   
     
     
         11 . The method according to  claim 10 , wherein
 two different DMRS sequences are generated based on different initial values.   
     
     
         12 . The method according to  claim 10 , wherein
 the DMRS configurations are based on a maximum number of DMRS ports.