Communication method and apparatus
This application provides a communication method and apparatus, where a first radio link control (RLC) entity is introduced to transmit a network-coded redundant packet, and a second RLC entity is introduced to transmit a network-coded original packet, to support requirement-based transmission of the network-coded redundant packet. In some embodiments, an apparatus receives scheduling information from an access network device. The apparatus obtains a network-coded redundant packet through a first RLC entity, generates a first transport block (TB) based on the network-coded redundant packet, and sends the first TB to the access network device, where the first TB includes the network-coded redundant packet. The first RLC entity is configured to transmit the network-coded redundant packet. In this way, the access network device schedules the network-coded redundant packet by using the scheduling information only when the network-coded redundant packet needs to be scheduled, avoiding resource waste by reducing unnecessary and redundant transmission.
1 . An apparatus, comprising at least one processing circuit, wherein the at least one processing circuit is configured to:
receive first scheduling information from an access network device, wherein the first scheduling information indicates that a first uplink grant resource is used to support sending of a network-coded redundant packet;
obtain the network-coded redundant packet through a first radio link control (RLC) entity, and generate a first transport block (TB) based on the network-coded redundant packet; and
send the first TB to the access network device on the first uplink grant resource, wherein the first TB comprises the network-coded redundant packet;
the first RLC entity is configured to transmit the network-coded redundant packet, the first RLC entity is independent of a second RLC entity, and the second RLC entity is configured to transmit a network-coded original packet; and
the network-coded redundant packet and the network-coded original packet are obtained by performing network-coding on a plurality of data packets.
2 . The apparatus according to claim 1 , wherein the first scheduling information carries a first indication, and the first indication indicates that the first uplink grant resource is used to support sending of the network-coded redundant packet.
3 . The apparatus according to claim 1 , wherein the at least one processing circuit is further configured to:
send an initially transmitted network-coded original packet to the access network device on the first uplink grant resource.
4 . The apparatus according to claim 3 , wherein a sending priority of a second logical channel associated with the second RLC entity is higher than a sending priority of a first logical channel associated with the first RLC entity, the first logical channel carries the network-coded redundant packet, and the second logical channel carries the network-coded original packet.
5 . The apparatus according to claim 1 , wherein the at least one processing circuit is further configured to:
receive second scheduling information from the access network device, wherein the second scheduling information indicates that a second uplink grant resource is used to send the network-coded original packet;
obtain the network-coded original packet through the second RLC entity, and generate a second TB based on the network-coded original packet; and
send the second TB to the access network device on the second uplink grant resource.
6 . The apparatus according to claim 5 , wherein
the second scheduling information carries a second indication, and the second indication indicates that the second uplink grant resource is used to send the network-coded original packet.
7 . The apparatus according to claim 5 , wherein the network-coded redundant packet is generated by performing network coding on the network-coded original packet.
8 . The apparatus according to claim 1 , wherein the at least one processing circuit is further configured to:
receive a first configuration message of a radio bearer from the access network device, wherein the first configuration message comprises configuration information of a first RLC bearer and configuration information of a second RLC bearer; and
establish the first RLC entity and the second RLC entity based on the first configuration message.
9 . The apparatus according to claim 8 , wherein the first configuration message further comprises packet data convergence protocol (PDCP) configuration information, and the at least one processing circuit is further configured to:
establish a PDCP entity based on the PDCP configuration information; and
send, by the PDCP entity, the network-coded redundant packet to the first RLC entity, and send, by the PDCP entity, the network-coded original packet to the second RLC entity.
10 . The apparatus according to claim 1 , wherein the at least one processing circuit is further configured to:
receive a second configuration message of a radio bearer from the access network device, wherein the second configuration message comprises configuration information of a first RLC bearer, configuration information of a second RLC bearer, and PDCP configuration information, the PDCP configuration information comprises a first proportion, and the first proportion is a ratio of a quantity of network-coded packets transmitted by the first RLC entity to a quantity of network-coded packets transmitted by the second RLC entity; and
establish the first RLC entity and the second RLC entity based on the second configuration message.
11 . An apparatus, comprising at least one processing circuit, wherein the at least one processing circuit is configured to:
send first scheduling information to a terminal device, wherein the first scheduling information indicates that a first uplink grant resource is used to support sending of a network-coded redundant packet; and
receive a first transport block (TB) from the terminal device, wherein the first TB comprises the network-coded redundant packet, and the first TB is generated by a first radio link control (RLC) entity based on the network-coded redundant packet;
the first RLC entity is configured to transmit the network-coded redundant packet, the first RLC entity is independent of a second RLC entity, and the second RLC entity is configured to transmit a network-coded original packet; and
the network-coded redundant packet and the network-coded original packet are obtained by performing network-coding on a plurality of data packets.
12 . The apparatus according to claim 11 , wherein the first scheduling information carries a first indication, and the first indication indicates that the first uplink grant resource is used to support sending of the network-coded redundant packet.
13 . The apparatus according to claim 11 , wherein the at least one processing circuit is configured to:
receive an initially transmitted network-coded original packet from the terminal device.
14 . The apparatus according to claim 11 , wherein the at least one processing circuit is configured to:
send second scheduling information to the terminal device, wherein the second scheduling information indicates that a second uplink grant resource is used to send the network-coded original packet; and
receive a second TB from the terminal device, wherein the second TB is generated based on the network-coded original packet.
15 . The apparatus according to claim 14 , wherein
the second scheduling information carries a second indication, and the second indication indicates that the second uplink grant resource is used to send the network-coded original packet.
16 . The apparatus according to claim 14 , wherein the network-coded redundant packet is generated by performing network coding on the network-coded original packet.
17 . The apparatus according to claim 11 , wherein the at least one processing circuit is configured to:
send a first configuration message of a radio bearer to the terminal device, wherein the first configuration message comprises configuration information of a first RLC bearer and configuration information of a second RLC bearer.
18 . The apparatus according to claim 17 , wherein the first configuration message further comprises packet data convergence protocol (PDCP) configuration information.
19 . The apparatus according to claim 11 , wherein the at least one processing circuit is configured to:
send a second configuration message of a radio bearer to the terminal device, wherein the second configuration message comprises configuration information of a first RLC bearer, configuration information of a second RLC bearer, and PDCP configuration information, the PDCP configuration information comprises a first proportion, and the first proportion is a ratio of a quantity of network-coded packets transmitted by the first RLC entity to a quantity of network-coded packets transmitted by the second RLC entity.
20 . A method, performed by a terminal device or by a chip for the terminal device, comprising:
receiving first scheduling information from an access network device, wherein the first scheduling information indicates that a first uplink grant resource is used to support sending of a network-coded redundant packet;
obtaining the network-coded redundant packet through a first radio link control (RLC) entity, and generating a first transport block (TB) based on the network-coded redundant packet; and
sending the first TB to the access network device on the first uplink grant resource, wherein the first TB comprises the network-coded redundant packet;
the first RLC entity is configured to transmit the network-coded redundant packet, the first RLC entity is independent of a second RLC entity, and the second RLC entity is configured to transmit a network-coded original packet; and
the network-coded redundant packet and the network-coded original packet are obtained by performing network-coding on a plurality of data packets.