Resource configuration method and apparatus, and system
Embodiments of this application disclose a resource configuration method, apparatus, and system. A network device sends, to a terminal device, resource configuration information of a demodulation reference signal (DMRS) resource that meets a predetermined rule. The terminal device receives the resource configuration information of a DMRS, where the received resource configuration information includes two or more groups of resource configuration information, and the DMRS is used for demodulating a physical data channel. In the two or more groups of resource configuration information, a DMRS resource configured by any group of resource configuration information does not intersect with a physical data channel resource corresponding to another group of resource configuration information.
1 . A resource configuration method, wherein the method comprises:
receiving two or more groups of resource configuration information of a demodulation reference signal (DMRS), wherein the resource configuration information is information for configuring DMRS resources used to transmit the DMRS and the DMRS is used for demodulating a physical data channel; and
determining, based on the two or more groups of resource configuration information, a DMRS resource configured by each group of resource configuration information,
wherein the resource configuration information comprises at least one of the following: a quantity of front-loaded DMRSs, a position of a front-loaded DMRS, a position of an additional DMRS, a DMRS type, or a quantity of additional DMRSs;
in the two or more groups of resource configuration information, a DMRS resource configured by a first group of resource configuration information does not intersect with a physical data channel resource corresponding to a second group of resource configuration information; and
a physical data channel corresponding to the physical data channel resource is demodulated by using a DMRS transmitted on a second DMRS resource configured by the second group of resource configuration information;
wherein the second DMRS resource is selected for demodulating the physical data channel based on a priority rule and the priority rule is based on whether signaling for configuring the resource configuration information is primary or secondary signaling.
2 . The method according to claim 1 , wherein the resource configuration information further comprises a DMRS type and the DMRS type is type 1 or type 2.
3 . The method according to claim 1 , wherein
the two or more groups of resource configuration information comprise parameter information shared between the groups, wherein the shared parameter information is sent by using higher layer signaling.
4 . A processing apparatus, comprising at least one processor, wherein the at least one processor is configured to read an instruction in a memory, and implement:
receiving two or more groups of resource configuration information of a demodulation reference signal (DMRS), wherein the resource configuration information is information for configuring DMRS resources used to transmit the DMRS and the DMRS is used for demodulating a physical data channel; and
determining, based on the resource configuration information, a DMRS resource configured by each group of resource configuration information,
wherein the resource configuration information comprises at least one of the following: a quantity of front-loaded DMRSs, a position of a front-loaded DMRS, a position of an additional DMRS, a DMRS type, or a quantity of additional DMRSs;
in the two or more groups of resource configuration information, a DMRS resource configured by a first group of resource configuration information does not intersect with a physical data channel resource corresponding to a second group of resource configuration information; and
a physical data channel corresponding to the physical data channel resource is demodulated by using a DMRS transmitted on a second DMRS resource configured by the second group of resource configuration information;
wherein the second DMRS resource is selected for demodulating the physical data channel based on a priority rule and the priority rule is based on whether signaling for configuring the resource configuration information is primary or secondary signaling.
5 . The processing apparatus according to claim 4 , wherein the resource configuration information further comprises a DMRS type and the DMRS type is type 1 or type 2.
6 . The processing apparatus according to claim 4 , wherein
the two or more groups of resource configuration information comprise parameter information shared between the groups, wherein the shared parameter information is sent by using higher layer signaling.
7 . The processing apparatus according to claim 4 , wherein the processing apparatus is a chip or a terminal device.
8 . A non-transitory computer-readable storage medium storing a computer program which when executed causes the following operations to be performed:
receiving two or more groups of resource configuration information of a demodulation reference signal (DMRS), wherein the resource configuration information is information for configuring DMRS resources used to transmit the DMRS and the DMRS is used for demodulating a physical data channel; and
determining, based on the two or more groups of resource configuration information, a DMRS resource configured by each group of resource configuration information,
wherein the resource configuration information comprises at least one of the following: a quantity of front-loaded DMRSs, a position of a front-loaded DMRS, a position of an additional DMRS, a DMRS type, or a quantity of additional DMRSs;
in the two or more groups of resource configuration information, a DMRS resource configured by a first group of resource configuration information does not intersect with a physical data channel resource corresponding to a second group of resource configuration information; and
a physical data channel corresponding to the physical data channel resource is demodulated by using a DMRS transmitted on a second DMRS resource configured by the second group of resource configuration information;
wherein the second DMRS resource is selected for demodulating the physical data channel based on a priority rule and the priority rule is based on whether signaling for configuring the resource configuration information is primary or secondary signaling.
9 . The non-transitory computer-readable storage medium according to claim 8 , wherein the resource configuration information further comprises a DMRS type and the DMRS type is type 1 or type 2.
10 . The non-transitory computer-readable storage medium according to claim 8 , wherein
the two or more groups of resource configuration information comprise parameter information shared between the groups, wherein the shared parameter information is sent by using higher layer signaling.
11 . The non-transitory computer-readable storage medium according to claim 8 , wherein the non-transitory computer-readable storage medium is on a chip or a terminal device.
12 . The non-transitory computer-readable storage medium according to claim 8 , wherein that a DMRS resource configured by the first group of resource configuration information does not intersect with the physical data channel resource corresponding to the second group of resource configuration information comprises:
the DMRS resource configured by the first group of resource configuration information is identical with the DMRS resource configured by the second group of resource configuration information in time domain.
13 . The method according to claim 1 , wherein that the DMRS resource configured by the first group of resource configuration information does not intersect with the physical data channel resource corresponding to the second group of resource configuration information further comprises:
the DMRS resource configured by the first group of resource configuration information is identical with the DMRS resource configured by the second group of resource configuration information in time domain.
14 . The method according to claim 1 , wherein the priority rule is further based on whether signaling for configuring the resource configuration information is fast or slow signaling.
15 . The method according to claim 1 , wherein the priority rule is further based on whether a cell or a cell group corresponding to the resource configuration information is primary or secondary.
16 . The method according to claim 1 , wherein a mapping type of a first physical data channel associated with a front-loaded DMRS comprises a type A and a type B, and when the mapping type is the type B the position of the front-loaded DMRS is associated with a resource position of the first physical data channel.
17 . The method according to claim 1 , wherein a mapping type of a first physical data channel associated with a front-loaded DMRS comprises a type A and a type B, and when the mapping type is the type A the position of the first front-loaded DMRS is located at a fixed symbol position.
18 . The method according to claim 17 , wherein the fixed symbol position is a symbol 2 or a symbol 3, where the symbols are numbered starting from 0.
19 . The processing apparatus according to claim 4 , wherein the priority rule is further based on whether a cell or a cell group corresponding to the resource configuration information is primary or secondary.