Information transmission method and device

Abstract

An information transmission method and a device are provided. The method includes: receiving antenna port grouping information from a terminal device, where the antenna port grouping information includes information about at least one antenna port group of the terminal device and information about at least one antenna port included in each antenna port group; sending indication information to the terminal device based on the antenna port grouping information, where the indication information is used to indicate an antenna port group set used by the terminal device to transmit uplink information at a first moment, the antenna port group set includes at least one first antenna port group, and the first antenna port group is one of antenna port groups indicated by the antenna port grouping information. The terminal device is prevented from continuously sending uplink information on a blocked antenna port.

1 . An information transmission method, comprising:
 receiving antenna port grouping information from a terminal device, wherein the antenna port grouping information comprises information about at least one antenna port group of the terminal device and information about at least one antenna port comprised in each antenna port group, or information about at least one antenna port group of the terminal device and information about antenna ports of the terminal device; and   sending a transmitted precoding matrix indicator (TPMI) of a precoding matrix W to the terminal device, wherein   W is related to a first precoding matrix w corresponding to a first antenna port group in an antenna port group set and a phase correlation between different first antenna port groups, the antenna port group set comprises at least one first antenna port group, the first antenna port group is one of antenna port groups indicated by the antenna port grouping information, and each first antenna port group corresponds to the same first precoding matrix w; and   a quantity of rows of W equals a total quantity of the antenna ports of the terminal device, and a quantity of columns of W equals a quantity of transmission layers between an access network device and the terminal device.   
     
     
         2 . An apparatus, comprising a processor, wherein the processor is coupled to a memory, and the processor is configured to execute a program or an instruction stored in the memory, and when the processor executes the instruction stored in the memory, the apparatus is configured to perform the following:
 receiving antenna port grouping information from a terminal device, wherein the antenna port grouping information comprises information about at least one antenna port group of the terminal device and information about at least one antenna port comprised in each antenna port group, or information about at least one antenna port group of the terminal device and information about antenna ports of the terminal device; and   sending a first transmitted precoding matrix indicator (TPMI) of a matrix W x  and a second TPMI of a matrix W 2  to the terminal device, wherein W is used to represent a selection factor used by an access network device to select an antenna port group set from the at least one antenna port group and a phase correlation between different first antenna port groups in the antenna port group set, W 2  is a first precoding matrix w corresponding to the first antenna port group, each first antenna port group corresponds to the same first precoding matrix w, the first antenna port group is one of antenna port groups indicated by the antenna port grouping information, and the first TPMI and the second TPMI are used for determination of a precoding matrix W .   
     
     
         3 . The apparatus according to  claim 2 , wherein W=W x ⊗W 2 , a quantity of rows of W equals a quantity of first antenna port groups in the antenna port group set, a quantity of columns of W x  is 1, a quantity of rows of W 2  equals a total quantity of antenna ports in the first antenna port group, and a quantity of columns of W 2  is a quantity of transmission layers between the access network device and the terminal device; and M elements in W x  are each a complex number of modulus 1, one or more remaining elements are 0, and M is the quantity of first antenna port groups in the antenna port group set. 
     
     
         4 . The apparatus according to  claim 2 , wherein W=W x ×W 2 , a quantity of rows of W x  equals a total quantity of all antenna ports of the terminal device, a quantity of columns of W x  equals a total quantity of antenna ports in the first antenna port group, a quantity of rows of A equals the total quantity of antenna ports in the first antenna port group, and a quantity of columns of W 2  is a quantity of transmission layers between the access network device and the terminal device; and all elements in a same row in W x  are the same, M rows of elements in W x  are each a complex number of modulus 1, other rows of elements are 0, and M is a quantity of first antenna port groups in the antenna port group set. 
     
     
         5 . An apparatus, comprising a processor, wherein the processor is coupled to a memory, and the processor is configured to execute a program or an instruction stored in the memory, and when the processor executes the instruction stored in the memory, the apparatus is configured to perform the following:
 receiving antenna port grouping information from a terminal device, wherein the antenna port grouping information comprises information about at least one antenna port group of the terminal device and information about at least one antenna port comprised in each antenna port group, or information about at least one antenna port group of the terminal device and information about antenna ports of the terminal device; and   sending a transmitted precoding matrix indicator (TPMI) of a precoding matrix W to the terminal device, wherein   W is related to a first precoding matrix w corresponding to a first antenna port group in an antenna port group set and a phase correlation between different first antenna port groups, the antenna port group set comprises at least one first antenna port group, the first antenna port group is one of antenna port groups indicated by the antenna port grouping information, and each first antenna port group corresponds to the same first precoding matrix w; and   a quantity of rows of W equals a total quantity of the antenna ports of the terminal device, and a quantity of columns of W equals a quantity of transmission layers between aa access network device and the terminal device.