Method, Apparatus, and System for Obtaining Control Resource Set

Abstract

This application relates to the wireless communications field, and provides a method for obtaining a control resource set. The method includes receiving, by a terminal device, at least one piece of indication information from a network device, where the at least one piece of indication information is used to indicate a first time domain resource position, and the first time domain resource position is unavailable for transmitting control information, obtaining, by the terminal device, a second control resource set based on the at least one piece of indication information, and detecting, by the terminal device, the control information on the second control resource set.

1 . A method comprising:
 receiving, by a terminal device, indication information from a network device, wherein the indication information indicates a first time domain resource position, and the first time domain resource position is unavailable for transmitting control information;   obtaining, by the terminal device, a second control resource set according to the indication information; and   receiving, by the terminal device, the control information on the second control resource set.   
     
     
         2 . The method according to  claim 1 , wherein the method further comprises, before receiving, by the terminal device, the indication information from the network device:
 obtaining, by the terminal device, a configured available control resource set, wherein the configured available control resource set comprises a first control resource set, wherein the first control resource set is used to transmit the control information, and wherein at least part of the first control resource set occupies the first time domain resource position.   
     
     
         3 . The method according to  claim 2 , wherein the obtaining, by the terminal device, the second control resource set according to the indication information comprises:
 obtaining, by the terminal device, the second control resource set according to the first time domain resource position and the first control resource set.   
     
     
         4 . The method according to  claim 1 , wherein the indication information further indicates a third control resource set; and wherein obtaining, by the terminal device, the second control resource set according to the indication information comprises:
 using, by the terminal device, the third control resource set as the second control resource set.   
     
     
         5 . The method according to  claim 1 , further comprising:
 determining, by the terminal device, search space configuration information of the second control resource set, wherein the search space configuration information comprises at least one of a quantity of control channel candidates, an aggregation level, or a downlink control information format.   
     
     
         6 . A method comprising:
 transmitting, by a network device, at least one piece of indication information to a terminal device, wherein the at least one piece of indication information indicates at least one piece of configuration information, wherein the at least one piece of configuration information comprises a first time domain resource position, and wherein the first time domain resource position is unavailable for transmitting control information;   obtaining, by the network device, a second control resource set based on the at least one piece of configuration information; and   transmitting, by the network device, the control information on the second control resource set.   
     
     
         7 . The method according to  claim 6 , wherein the method further comprises, before the transmitting, by the network device, at least one piece of indication information to the terminal device:
 configuring, by the network device, an available control resource set for the terminal device, wherein the available control resource set comprises a first control resource set, wherein the first control resource set is used to transmit the control information, and wherein a part or all of the first control resource set occupies the first time domain resource position.   
     
     
         8 . The method according to  claim 7 , wherein the obtaining, by the network device, the second control resource set based on the at least one piece of configuration information comprises:
 obtaining, by the network device, the second control resource set based on the first time domain resource position and the first control resource set.   
     
     
         9 . The method according to  claim 6 , wherein the at least one piece of configuration information further comprises a third control resource set; and wherein the obtaining, by the network device, the second control resource set based on the at least one piece of configuration information comprises:
 using, by the network device, the third control resource set as the second control resource set.   
     
     
         10 . The method according to  claim 6 , comprising:
 determining, by the network device, search space configuration information of the second control resource set, wherein the search space configuration information comprises at least one of a quantity of control channel candidates, an aggregation level, or a downlink control information format.   
     
     
         11 . An apparatus comprising:
 one or more processors, and   a non-transitory computer-readable storage medium in communication with the one or more processors, wherein the non-transitory computer-readable storage medium stores program instructions, and wherein, when executed by the one or more processors, the program instructions cause the apparatus to:
 receive indication information from a network device, wherein the indication information indicates a first time domain resource position, and wherein the first time domain resource position is unavailable for transmitting control information; 
 obtain a second control resource set according to the indication information; and 
 receive the control information on the second control resource set. 
   
     
     
         12 . The apparatus according to  claim 11 , wherein the program instructions further cause the apparatus to, before receiving the indication information from the network device:
 obtain a configured available control resource set, wherein the configured available control resource set comprises a first control resource set, wherein the first control resource set is used to transmit the control information, and where at least part of the first control resource set occupies the first time domain resource position.   
     
     
         13 . The apparatus according to  claim 12 , wherein the program instructions to obtain the second control resource set according to the indication information comprises program instructions to:
 obtain the second control resource set according to the first time domain resource position and the first control resource set.   
     
     
         14 . The apparatus according to  claim 11 , wherein the indication information further indicates a third control resource set; and wherein the program instructions to obtain the second control resource set according to the indication information further comprises program instructions to:
 use the third control resource set as the second control resource set.   
     
     
         15 . The apparatus according to  claim 11 , wherein the program instructions further comprise program instructions to:
 determine search space configuration information of the second control resource set, wherein the search space configuration information comprises at least one of a quantity of control channel candidates, an aggregation level, or a downlink control information format.   
     
     
         16 . An apparatus, comprising:
 one or more processors, and   a non-transitory computer-readable storage medium in communication with the one or more processors, wherein the non-transitory computer-readable storage medium stores program instructions, and wherein, when executed by the one or more processors, the program instructions cause the apparatus to:
 transmit at least one piece of indication information to a terminal device, wherein the at least one piece of indication information indicates at least one piece of configuration information, wherein the at least one piece of configuration information comprises a first time domain resource position, and wherein the first time domain resource position is unavailable for transmitting control information; 
 obtain a second control resource set based on the at least one piece of configuration information; and 
 transmit the control information on the second control resource set. 
   
     
     
         17 . The apparatus according to  claim 16 , wherein the program instructions further comprise program instructions to, before transmitting at least one piece of indication information to the terminal device:
 configure an available control resource set for the terminal device, wherein the available control resource set comprises a first control resource set, wherein the first control resource set is used to transmit the control information, and wherein a part or all of the first control resource set occupies the first time domain resource position.   
     
     
         18 . The apparatus according to  claim 17 , wherein the program instructions to obtain the second control resource set based on the at least one piece of configuration information comprises program instructions to:
 obtain the second control resource set based on the first time domain resource position and the first control resource set.   
     
     
         19 . The apparatus according to  claim 16 , wherein the at least one piece of configuration information further comprises a third control resource set; and wherein the obtaining, by the apparatus, the second control resource set based on the at least one piece of configuration information further comprises:
 using, by the apparatus, the third control resource set as the second control resource set.   
     
     
         20 . The apparatus according to  claim 16 , the program instructions further cause the apparatus to:
 determine search space configuration information of the second control resource set, wherein the search space configuration information comprises at least one of a quantity of control channel candidates, an aggregation level, or a downlink control information format.