Method, apparatus and system for bearing circuit switched domain service data over radio bearer

1. A method for processing Circuit Switched domain (CS-domain) service data, wherein the CS-domain service data includes a speech service data comprising substreams A, B, and C with different importance classes, the method comprising:

encapsulating the substreams A, B, and C into a single speech frame;

mapping the speech frame onto a single radio bearer (RB);

encapsulating the RB with radio link control (RLC) protocol;

mapping the RLC to a dedicated traffic channel (DTCH); and

mapping the DTCH to an High Speed Download Packet Access (HSDPA) downlink shared channel (HS-DSCH);

wherein the speech frame comprises: Frame Type, Payload, and Padding, wherein the Frame Type has a fixed length and represents an Adaptive Multi-Rate (AMR) or Adaptive Multi-Rate Wideband (AMR-WB) coding mode, the payload is a data made up of the concatenated substreams A, B and C, and the padding is a filler bit, when a sum of the frame type and the payload is out of alignment against bytes, several bits are used as a padding to make the whole speech frame aligned against bytes.

2. The method of claim 1 , further comprising sending information indicating whether a UE has capability to communicate CS-domain service data over a radio high-speed packet data access channel.

3. The method of claim 1 , wherein the CS-domain service data is a CS-domain Adaptive Multi-Rate (AMR) speech service data or an AMR WideBand (AMR-WB) speech service data.

4. The method of claim 1 , wherein importance of the substream A is greater than that of the substream B, and the importance of the substream B is greater than that of the substream C.

5. A communications controller, comprising:

a processor configured to encapsulate substreams A, B, and C with different importance classes into a single speech frame, wherein the substreams A, B, and C are included in a speech service data of CS-domain service data, to map the speech frame onto a single radio bearer (RB), to encapsulate the RB with radio link control (RLC) protocol, to map the RLC to a dedicated traffic channel (DTCH), and to map the DTCH to an High Speed Download Packet Access (HSDPA) downlink shared channel (HS-DSCH); and

a transmitter configured to send the speech frame to a user equipment (UE) by using the HS-DSCH;

wherein the speech frame comprises: Frame Type, Payload, and Padding, wherein the Frame Type has a fixed length and represents an Adaptive Multi-Rate (AMR) or Adaptive Multi-Rate Wideband (AMR-WB) coding mode, the payload is a data made up of the concatenated substreams A, B and C, and the padding is a filler bit, when a sum of the frame type and the payload is out of alignment against bytes, several bits are used as a padding to make the whole speech frame aligned against bytes.

6. The communications controller of claim 5 , wherein the communications controller is a radio network controller (RNC) or a base station controller (BSC).

7. The communications controller of claim 5 , further comprising a transceiver configured to receive information indicating whether a UE has the capability to communicate CS-domain service data over a radio high-speed packet data access channel.

8. The communications controller of claim 5 , wherein the CS-domain service data is a CS-domain Adaptive Multi-Rate (AMR) speech service data or an AMR WideBand (AMR-WB) speech service data.

9. The communications controller of claim 5 , further comprising a transmitter configured to send a mode control command comprising coding rate information to a user equipment (UE).

10. The communications controller of claim 5 , wherein importance of the substream A is greater than that of the substream B, and the importance of the substream B is greater than that of the substream C.