Communication method and apparatus
In accordance with an embodiment, a method includes receiving node configuration information and a first beam set of a first node from the first node; and forwarding the first beam set to form a second beam set of a second node based on the node configuration information, wherein the first beam set and the second beam set each comprise at least one beam.
1 . A method applied to a second node, the method comprising:
receiving node configuration information and a first beam set of a first node from the first node, wherein the node configuration information comprises forwarding configuration information, wherein the forwarding configuration information comprises: forwarding start time information, wherein the forwarding start time information comprises a first interval and start orthogonal frequency division multiplexing (OFDM) symbol information, wherein the first interval indicates a quantity of slots between a slot in which the second node receives the node configuration information and a forwarding start slot, and the start OFDM symbol information indicates a forwarding start OFDM symbol in the forwarding start slot; and
forwarding the first beam set to form a second beam set of the second node based on the node configuration information, wherein the first beam set and the second beam set each comprise at least one beam.
2 . The method according to claim 1 , wherein:
a beam multiplexing mode in the first beam set comprises time division multiplexing or frequency division multiplexing; and
a beam multiplexing mode in the second beam set comprises spatial division multiplexing.
3 . The method according to claim 1 , wherein the node configuration information further comprises at least one of:
power control information;
control information occasion information, wherein the control information occasion information indicates a time-frequency resource location at which the second node receives control information from the first node;
N sets of beamforming (BF) parameter information supported by the second node, wherein N is greater than or equal to 1, wherein the BF parameter information comprises one or more of a phase offset, an amplitude, and an index, and the index indicates the phase offset or the amplitude; or
frequency band amplification and suppression information of the second node.
4 . The method according to claim 3 , wherein the forwarding configuration information further comprises at least one of:
first duration information, wherein the first duration information indicates a sending duration for which the second node sends a first beam in the second beam set using a first BF parameter;
first indication information, wherein the first indication information indicates a quantity of beams in the second beam set;
time forwarding pattern information of the second node, wherein the time forwarding pattern information of the second node indicates time locations at which the second node forwards the second beam set from forwarding start time; or
direction forwarding pattern information of the second node, wherein the direction forwarding pattern information of the second node indicates BF parameters used by the second node to forward the second beam set.
5 . The method according to claim 4 , wherein the first indication information comprises at least one of:
a subcarrier spacing;
a frequency band;
cell identifier information; or
K, wherein K is greater than or equal to 1 and less than or equal to N, wherein when the first indication information is K, the second node forwards K beams in the second beam set by using K sets of beamforming parameters.
6 . The method according to claim 4 , wherein the control information occasion information comprises at least one of:
a time periodicity;
a frequency domain resource block;
a quantity of occupied orthogonal frequency division multiplexing (OFDM) symbols; or
a time start location.
7 . The method according to claim 4 , wherein:
the time forwarding pattern information of the second node comprises a first bitmap, and a bit in the first bitmap corresponds to a unit interval; and
when a value of a bit in the first bitmap is a first preset value, the second node forwards a beam in the second beam set at a unit interval corresponding to the bit.
8 . The method according to claim 1 , wherein the node configuration information is carried in at least one of:
radio resource control (RRC) layer signaling;
downlink control information (DCI) of a physical downlink control channel; or
a media access control (MAC) control element (CE).
9 . The method according to claim 1 , wherein a control plane protocol stack of the second node comprises a radio resource control (RRC) layer, a media access control (MAC) layer, and a physical (PHY) layer.
10 . A method applied to a first node, the method comprising:
generating node configuration information, wherein the node configuration information comprises forwarding configuration information, wherein the forwarding configuration information comprises: forwarding start time information, wherein the forwarding start time information comprises a first interval and start orthogonal frequency division multiplexing (OFDM) symbol information, wherein the first interval indicates a quantity of slots between a slot in which a second node receives the node configuration information and a forwarding start slot, and the start OFDM symbol information indicates a forwarding start OFDM symbol in the forwarding start slot;
sending the node configuration information to the second node, wherein the node configuration information is used for conversion of a first beam set of the first node into a second beam set of the second node, and the first beam set and the second beam set each comprise at least one beam; and
sending the first beam set.
11 . The method according to claim 10 , wherein:
a beam multiplexing mode in the first beam set comprises time division multiplexing or frequency division multiplexing; and
a beam multiplexing mode in the second beam set comprises spatial division multiplexing.
12 . The method according to claim 10 , wherein the node configuration information further comprises at least one of:
power control information;
control information occasion information, wherein the control information occasion information indicates a time-frequency resource location at which the first node sends control information to the second node;
N sets of beamforming (BF) parameter information supported by the second node, wherein N is greater than or equal to 1, wherein the BF parameter information comprises one or more of a phase offset, an amplitude, and an index, and the index indicates the phase offset or the amplitude; or
frequency band amplification and suppression information of the second node.
13 . The method according to claim 12 , wherein the forwarding configuration information further comprises at least one of:
first duration information, wherein the first duration information indicates a use duration of a first BF parameter, the use duration of the first BF parameter is equal to a sending duration of a first beam in the second beam set;
first indication information, wherein the first indication information indicates a quantity of beams in the second beam set;
time forwarding pattern information of the second node, wherein the time forwarding pattern information of the second node indicates a time location of a forwarded beam in the second beam set; or
direction forwarding pattern information of the second node, wherein the direction forwarding pattern information of the second node indicates a BF parameter used for forwarding each beam in the second beam set.
14 . The method according to claim 13 , wherein the first indication information comprises at least one of:
a subcarrier spacing;
a frequency band;
cell identifier information; or
K, wherein K is greater than or equal to 1 and less than or equal to N, wherein when the first indication information is K, the first node explicitly indicates that a quantity of sets of beamforming parameters is K.
15 . The method according to claim 13 , wherein:
the time forwarding pattern information of the second node comprises a first bitmap, and a bit in the first bitmap corresponds to a unit interval; and
when a value of a bit in the first bitmap is a first preset value, the second node forwards a beam in the second beam set at a unit interval corresponding to the bit.
16 . A communication system, comprising:
a first node configured to send node configuration information and a first beam set to a second node; and
the second node configured to:
receive the node configuration information and the first beam set, wherein the node configuration information comprises forwarding configuration information, wherein the forwarding configuration information comprises: forwarding start time information, wherein the forwarding start time information comprises a first interval and start orthogonal frequency division multiplexing (OFDM) symbol information, wherein the first interval indicates a quantity of slots between a slot in which the second node receives the node configuration information and a forwarding start slot, and the start OFDM symbol information indicates a forwarding start OFDM symbol in the forwarding start slot; and
forward the first beam set to form a second beam set of the second node based on the node configuration information, wherein the first beam set and the second beam set each comprise at least one beam.
17 . The system according to claim 16 , wherein the node configuration information further comprises at least one of:
power control information;
control information occasion information, wherein the control information occasion information indicates a time-frequency resource location at which the second node receives control information from the first node;
N sets of beamforming (BF) parameter information supported by the second node, wherein N is greater than or equal to 1, the BF parameter information comprises one or more of a phase offset, an amplitude, and an index, and the index indicates the phase offset or the amplitude; or
frequency band amplification and suppression information of the second node.
18 . The system according to claim 17 , wherein the forwarding configuration information comprises at least one of:
first duration information, wherein the first duration information indicates a sending duration for which the second node sends a first beam in the second beam set using a first BF parameter;
first indication information, wherein the first indication information indicates a quantity of beams in the second beam set;
time forwarding pattern information of the second node, wherein the time forwarding pattern information of the second node indicates time locations at which the second node forwards the second beam set from forwarding start time; and
direction forwarding pattern information of the second node, wherein the direction forwarding pattern information of the second node indicates BF parameters used by the second node to forward the second beam set.
19 . The system according to claim 18 , wherein the first indication information comprises at least one of:
a subcarrier spacing;
a frequency band;
cell identifier information; or
K, wherein K is greater than or equal to 1 and less than or equal to N, wherein when the first indication information is K, the second node forwards K beams in the second beam set by using K sets of beamforming parameters.
20 . The system according to claim 18 , wherein:
the time forwarding pattern information of the second node comprises a first bitmap, and a bit in the first bitmap corresponds to a unit interval; and
when a value of a bit in the first bitmap is a first preset value, the second node forwards a beam in the second beam set at a unit interval corresponding to the bit.