Method for coordinating transmissions between different communications apparatuses and communication sapparatuses utilizing the same

1. A method for coordinating transmissions between different communications apparatuses in a communications system, comprising:

obtaining a sub-frame indicator carried in a first control signal transmitted in a control region of a first sub-frame received from an evolved node B (eNB), wherein the sub-frame indicator indicates resource allocation of one or more sub-frame following the first sub-frame;

determining whether a second sub-frame following the first sub-frame and received from the eNB is an almost blank sub-frame according to the sub-frame indicator; and

when the second sub-frame is not the almost blank sub-frame, obtaining information regarding a start position of a data region of the second sub-frame from a second control signal transmitted in a control region of the second sub-frame.

2. The method as claimed in claim 1 , further comprising:

when the second sub-frame is the almost blank sub-frame, obtaining information regarding the start position of the data region of the second sub-frame according to predetermined information not transmitted in the control region of the second sub-frame.

3. The method as claimed in claim 2 , wherein the predetermined information is a maximum control region size defined by the communications system.

4. The method as claimed in claim 2 , wherein the predetermined information is obtained via radio resource control (RRC) signaling.

5. A method for coordinating transmissions between different communications apparatuses in a communications system, comprising:

carrying a sub-frame indicator in a first control signal to be transmitted in a control region of a first sub-frame to indicate a user equipment whether a second sub-frame following the first sub-frame is an almost blank sub-frame.

6. The method as claimed in claim 5 , wherein when the second sub-frame is not the almost blank sub-frame, the method further comprises:

carrying information regarding a start position of a data region of the second sub-frame in a second control signal to be transmitted in a control region in the second sub-frame.

7. The method as claimed in claim 5 , wherein when the second sub-frame is the almost blank sub-frame, the method further comprises:

setting a start position of a data region of the second sub-frame according to a maximum control region size by the communications system; and

carrying data in the data region from the start position of the second sub-frame.

8. The method as claimed in claim 5 , wherein when the second sub-frame is the almost blank sub-frame, the method further comprises:

informing the user equipment of information regarding a start position of a data region of the second sub-frame via radio resource control (RRC) signaling; and

carrying data in the data region from the start position of the second sub-frame.

9. A method for a communications system to assign an Almost Blank Sub-frame (ABS) pattern, comprising:

collecting one or more neighbor evolved node B(s)'s (eNB(s)'s) information;

identifying at least one victim eNB which serves one or more user equipment(s) interfered by the communications system based on the collected neighbor eNB(s)'s information;

assigning the ABS pattern to the victim eNB such that an interference within a cell of the victim eNB is reduced.

10. The method as claimed in claim 9 , wherein the ABS pattern is assigned according to a predetermined configuration of the communications system.

11. The method as claimed in claim 9 , wherein the ABS pattern is assigned according to a predetermined configuration of the victim eNB.

12. The method as claimed in claim 9 , wherein the ABS pattern is assigned with a period of 8 sub-frames.

13. The method as claimed in claim 9 , wherein the ABS pattern is assigned with a period of 10 sub-frames.

14. The method as claimed in claim 9 , wherein the ABS pattern is assigned with a period of 60 sub-frames.

15. The method as claimed in claim 9 , wherein the ABS pattern is assigned with a period of 70 sub-frames.

16. The method as claimed in claim 9 , further comprising:

updating the collected neighbor eNB(s)'s information; and

adjusting the assigned ABS pattern according to the updated information.

17. The method as claimed in claim 16 , wherein the adjustment of the assigned ABS pattern is periodically.

18. The method as claimed in claim 16 , wherein the adjustment of the assigned ABS pattern is aperiodically.