Method and device for sending and receiving acknowledgement

A method for receiving an acknowledgement, comprising:

• receiving, by a user equipment, first subframe ratio information and second subframe ratio information that are sent by a network-side device, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
• sending, by the user equipment, uplink data to the network-side device according to the second subframe ratio information;
• determining, by the user equipment, an acknowledgement subframe for the uplink data according to a second timing relation set for the second subframe ratio information and a subframe for sending the uplink data;
• and
• if the acknowledgement subframe is a subframe in which a first physical hybrid automatic repeat request indicator channel PHICH resource set exists, receiving, by the user equipment by using a PHICH resource in the first PHICH resource set, an acknowledgement sent by the network-side device;
• if the acknowledgement subframe is a subframe in which the first PHICH resource set does not exist, receiving, by the user equipment by using a PHICH resource in a reserved second PHICH resource set, an acknowledgement sent by the network-side device, wherein the subframe in which the first PHICH resource set exists is determined by the user equipment according to a first timing relation set for the first subframe ratio.

A network-side device, comprising:

• a sender, configured to send first subframe ratio information and second subframe ratio information to a user equipment, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
• a processor, configured to determine a first acknowledgement subframe set according to a first timing relation set for the first subframe ratio information sent by the sender and reserve a first physical hybrid automatic repeat request indicator channel PHICH resource set in an acknowledgement subframe of the first acknowledgement subframe set, or determine a second acknowledgement subframe set according to a second timing relation set for the second subframe ratio information sent by the sender and reserve a second PHICH resource set in an acknowledgement subframe, in which the first PHICH resource set does not exist, of the second acknowledgement subframe set;
• and
• a receiver, configured to receive uplink data sent by the user equipment according to the second subframe ratio information sent by the sender;
• wherein:
• the processor is further configured to determine, according to the second timing relation and a subframe for the uplink data received by the receiver, an acknowledgement subframe for the uplink data received by the receiver;
• and
• the sender is further configured to, if the first PHICH resource set exists in the acknowledgement subframe determined by the processor, send an acknowledgement to the user equipment by using a PHICH resource in the first PHICH resource set reserved by the processor;
• if the first PHICH resource set does not exist in the acknowledgement subframe determined by the processor, send an acknowledgement to the user equipment by using a PHICH resource in the second PHICH resource set reserved by the processor.

A user equipment, comprising:

• a receiver, configured to receive first subframe ratio information and second subframe ratio information that are sent by a network-side device, wherein subframe ratios represented by the first subframe ratio information and the second subframe ratio information are different;
• a sender, configured to send uplink data to the network-side device according to the second subframe ratio information received by the receiver;
• and
• a processor, configured to determine an acknowledgement subframe for the uplink data according to a second timing relation set for the second subframe ratio information received by the receiver and a subframe for sending the uplink data;
• wherein:
• the receiver is further configured to, if the acknowledgement subframe determined by the processor is a subframe in which a first physical hybrid automatic repeat request indicator channel PHICH resource set exists, receive, by using a PHICH resource in the first PHICH resource set, an acknowledgement sent by the network-side device;
• if the acknowledgement subframe determined by the processor is a subframe in which the first PHICH resource set does not exist, receive, by using a PHICH resource in a reserved second PHICH resource set, an acknowledgement sent by the network-side device, wherein the subframe in which the first PHICH resource set exists is determined by the processor according to a first timing relation set for the first subframe ratio.