Method and apparatus for transmitting data

1. A method for transmitting data, comprising:

acquiring a Multicast and Broadcast Service Mapping Information Element (MBS_MAP_IE) carried in a DL_MAP message and MBS data corresponding to the MBS_MAP_IE, wherein the MBS_MAP_IE carries a parameter for indicating the frame position of a next MBS_MAP_IE;

setting a sleep duration according to the parameter for indicating the frame position of the next MBS_MAP_IE; and

acquiring the next MBS_MAP_IE carried in a next DL_MAP message and MBS data corresponding to the next MBS_MAP_IE when the sleep duration expires.

2. The method of claim 1 , wherein the parameter for indicating the frame position of the next MBS_MAP_IE is a parameter for indicating the frame offset from the next MBS_MAP_IE to the MBS_MAP_IE; and

the set sleep duration is the time duration corresponding to the parameter for indicating the frame offset from the next MBS_MAP_IE to the MBS_MAP_IE.

3. The method of claim 1 , wherein the MBS_MAP_IE further carries a parameter for indicating the symbol offset from the next MBS_MAP_IE to the header of the frame comprising the next MBS_MAP_IE and a parameter for indicating the length of the next MBS_MAP_IE.

4. The method of claim 3 , wherein acquiring the next MBS_MAP_IE comprises:

acquiring the next MBS_MAP_IE according to the parameter for indicating the symbol offset from the next MBS_MAP_IE to the header of the frame comprising the next MBS_MAP_IE and the parameter for indicating the length of the next MBS_MAP_IE carried in the MBS_MAP_IE.

5. The method of claim 1 , wherein the MBS_MAP_IE further carries a parameter for indicating the length of the next MBS_MAP_IE and a parameter for indicating the length of the MBS data.

6. The method of claim 5 , wherein acquiring the next MBS_MAP_IE carried in the next DL_MAP message and MBS data comprises:

acquiring the next MBS_MAP_IE carried in the next DL_MAP message and the MBS data during a listening duration; and the listening duration is set as the sum of the time duration corresponding to the parameter for indicating the length of the next MBS_MAP_IE and the time duration corresponding to the parameter for indicating the length of the MBS data.

7. The method of claim 1 , wherein the acquiring the next MBS_MAP_IE carried in the next DL_MAP message comprises:

acquiring the next MBS_MAP_IE from the next DL_MAP message according to parameters carried in the next DL_MAP message, wherein the parameters carried in the next DL_MAP message include a parameter for indicating the type of an information element and a parameter for indicating the length of the information element.

8. The method of claim 7 , wherein acquiring the next MBS_MAP_IE from the next DL_MAP message comprises:

parsing the next DL_MAP message;

taking an information element as the next MBS_MAP_IE when a Downlink Interval Usage Code (DIUC) corresponding to the information element is parsed as 15 and an extended DIUC corresponding to the information element is parsed as 0x00;

acquiring the parameter for indicating the length of the information element; and

acquiring the next MBS_MAP_IE according to the acquired parameter for indicating the length of the information element.

9. An apparatus for transmitting data, comprising:

a first unit, configured to acquire a Multicast and Broadcast Service Mapping Information Element (MBS_MAP_IE) carried in a DL_MAP message and MBS data corresponding to the MBS_MAP_IE, wherein the MBS_MAP_IE carries a parameter for indicating the frame position of the next MBS_MAP_IE;

a second unit, configured to set a sleep duration according to the parameter for indicating the frame position of the next MBS_MAP_IE; and

wherein the first unit is further configured to acquire the next MBS_MAP_IE carried in a next DL_MAP message and MBS data corresponding to the next MBS_MAP_IE when the sleep duration expires.

10. The apparatus of claim 9 , wherein the parameter for indicating the frame position of the next MBS_MAP_IE is a parameter for indicating the frame offset from the next MBS_MAP_IE to the MBS_MAP_IE; and

the second unit is further configured to the set sleep duration according to the parameter for indicating the frame offset from the next MBS_MAP_IE to the MBS_MAP_IE.

11. The apparatus of claim 9 , wherein the MBS_MAP_IE further carries a parameter for indicating the length of the next MBS_MAP_IE and a parameter for indicating the length of the MBS data; and

the second unit is further configured to set the sum of the time duration corresponding to the length of the next MBS_MAP_IE and the time duration corresponding to the length of the MBS data as a listening duration; and

the first unit is further configured to acquire the next MBS_MAP_IE and the MBS data corresponding to the next MBS_MAP_IE, during the listening duration.