Voice over internet protocol processing method and related network device

A voice over Internet protocol processing method, comprising:

• receiving, by a cloud server, first signaling sent by a calling access network element, wherein the first signaling carries an off-hook event that is an off-hook of a first phone set;
• creating, by the cloud server, a session management and a media management in response to receiving the first signaling;
• sending, by the cloud server, second signaling to the calling access network element, wherein the second signaling comprises a connect command, a used encoding/decoding form, a sampling rate, and a packet time, and is used to establish a first transmission path between the calling access network element and the cloud server, wherein the first transmission path is used to transmit data between the calling access network element and the cloud server;
• receiving, by the cloud server, at the sampling rate and a required frame size, an encapsulated pulse code modulated (PCM) bitstream output by a codec, with control information, through the first transmission path;
• and
• performing signal tone insertion and detection on the PCM bitstream, wherein the calling access network element does not perform the signal tone insertion or detection on the PCM bitstream.

A calling access network element, comprising:

• a detection unit, configured to detect an off-hook event, wherein the off-hook event is off-hook of a first phone set, and the first phone set is connected to the calling access network element;
• an encapsulation unit, configured to encapsulate the off-hook event into first signaling;
• a first sending unit, configured to send the first signaling to a cloud server, wherein the first signaling causes the cloud server to create therein a session management and a media management;
• a first receiving unit, configured to receive second signaling sent by the cloud server, wherein the second signaling comprises a connect command, a used encoding/decoding form, a sampling rate, and a packet time and is used to establish a first transmission path between the calling access network element and the cloud server, wherein the first transmission path is used to transmit data between the calling access network element and the cloud server;
• and
• an establishment unit, configured to establish the first transmission path based on the second signaling;
• wherein the calling access network element is further configured to:
• encapsulate at the sampling rate and a required frame size, a pulse code modulated (PCM) bitstream output by a codec, add control information to the PCM bitstream, and transmit the PCM bitstream, with the added control information, through the first transmission path;
• wherein the cloud server performs signal tone insertion and detection on the PCM bitstream, and wherein the calling access network element does not perform the signal tone insertion or detection on the PCM bitstream.

A cloud server, comprising:

• a first receiving unit, configured to receive first signaling sent by a calling access network element, wherein the first signaling carries an off-hook event, and the off-hook event is off-hook of a first phone set;
• a creation unit configured to create a session management and a media management in response to receiving the first signaling;
• and
• a first sending unit, configured to send second signaling to the calling access network element, wherein the second signaling comprises a connect command, a used encoding/decoding form, a sampling rate, and a packet size and is used to establish a first transmission path between the calling access network element and the cloud server, wherein the first transmission path is used to transmit data between the calling access network element and the cloud server;
• wherein the cloud server is configured to:
• receive at the sampling rate and a required frame size, an encapsulated pulse code modulated (PCM) bitstream output by a codec, with control information, through the first transmission path, and
• perform signal tone insertion and detection on the PCM bitstream, wherein the calling access network element does not perform the signal tone insertion or detection on the PCM bitstream.

A called access network element, comprising:

• a receiving unit, configured to receive third signaling sent by a cloud server, wherein the third signaling comprises a connect command, a used encoding/decoding form, a sampling rate, and a packet time and is used to establish a second transmission path between the called access network element and the cloud server, wherein the second transmission path is used to transmit data between the called access network element and the cloud server;
• and
• an establishment unit, configured to establish the second transmission path based on the third signaling;
• wherein the called access network element is further configured to:
• encapsulate at the sampling rate and a required frame size, a pulse code modulated (PCM) bitstream output by a codec, add control information to the PCM bitstream, and transmit the PCM bitstream through the second transmission path;
• wherein the cloud server performs signal tone insertion and detection on the PCM bitstream, and wherein the called access network element does not perform the signal tone insertion or detection on the PCM bitstream.