Method and apparatus for providing hybrid automatic repeat request (HARQ) transmission, to meet transmissions requirements of different services
Example HARQ-based transmission methods and apparatus are provided, to meet transmission requirements of different services. In one example method, a network device receives a QoS parameter that is of a service corresponding to a service request and that is delivered by a core network device. The network device determines, based on the QoS parameter of the service, a HARQ configuration parameter corresponding to the service, and notifies the HARQ configuration parameter to the terminal device. Therefore, when different services are transmitted between the network device and the terminal device, different HARQ configuration parameters are configured for different services, and data transmission and retransmission of a service are performed based on a configured HARQ configuration parameter, so that transmission requirements of different services can be met.
1. A hybrid automatic repeat request (HARQ)-based transmission method, comprising:
receiving, by a network device, a quality of service (QoS) parameter that is of a service corresponding to a service request and that is delivered by a core network device;
determining, by the network device based on the QoS parameter of the service, a first radio interface technology for bearing the service; and
notifying, by the network device, a terminal device to use the first radio interface technology to transmit data corresponding to the service;
determining, by the network device based on the QoS parameter of the service, a HARQ configuration parameter corresponding to the service, wherein the HARQ configuration parameter comprises a maximum quantity of HARQ retransmission times corresponding to the service; and
notifying, by the network device, the HARQ configuration parameter to the terminal device.
2. The method according to claim 1 , wherein the HARQ configuration parameter comprises an acknowledgement (ACK) feedback time corresponding to the service and a negative acknowledgement (NACK) feedback time corresponding to the service.
3. The method according to claim 1 , wherein, before the receiving, by the network device, the QoS parameter that is of the service corresponding to the service request and that is delivered by the core network device, the method further comprises:
receiving, by the network device, the service request sent by the terminal device; and
sending, by the network device, the service request of the terminal device to the core network device.
4. The method according to claim 1 , wherein, after the notifying, by the network device, the HARQ configuration parameter to the terminal device, the method further comprises:
obtaining, by the network device and from the terminal device, data packets from a service bearer that is set up using the HARQ configuration parameter notified by the network device, to perform transmission multiplexing of the data packets to generate a transport block; and performing, by the network device, transmission and retransmission of the data packets based on the HARQ configuration parameter.
5. A hybrid automatic repeat request (HARQ)-based transmission method, comprising:
sending, by a terminal device, a service request to a core network device by using a network device;
receiving, by the terminal device, radio interface technology indication information sent by the network device, wherein the radio interface technology indication information is used to indicate a first radio interface technology that needs to be used by the terminal device to transmit a service of the service request; and
when no service bearer of the terminal device has been set up on the first radio interface technology, receiving, by the terminal device, a HARQ configuration parameter that is configured for the service of the service request and that is sent by the network device, wherein the HARQ configuration parameter comprises a maximum quantity of HARQ retransmission times corresponding to the service of the service request, and
configuring, by the terminal device, the HARQ configuration parameter for the service of the service request, and performing data transmission and retransmission with the network device based on the HARQ configuration parameter.
6. A hybrid automatic repeat request (HARQ)-based transmission apparatus, comprising:
a transmitter, wherein the transmitter is configured to send a service request to a core network device by using a network device;
a receiver, wherein the receiver is configured to receive radio interface technology indication information sent by the network device, wherein the radio interface technology indication information is used to indicate a first radio interface technology that needs to be used by a terminal device to transmit a service of the service request;
the receiver, wherein when no service bearer of the terminal device has been set up on the first radio interface technology, the receiver is configured to receive a HARQ configuration parameter that is configured for the service of the service request and that is sent by the network device, wherein the HARQ configuration parameter comprises a maximum quantity of HARQ retransmission times corresponding to the service of the service request; and
at least one processor, the at least one processor configured to:
configure the HARQ configuration parameter for the service of the service request when the HARQ configuration parameter has been received by the receiver; and
perform data transmission and retransmission with the network device based on the HARQ configuration parameter when the HARQ configuration parameter has been received by the receiver.