BEACON SIGNALING METHOD AND APPARATUS

• US 20110310858A1
• Filed: 06/15/2011
• Published: 12/22/2011
• Est. Priority Date: 06/16/2010
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tokgoz, Yeliz, Black, Peter John, Yavuz, Mehmet, Soriaga, Joseph B., Makh, Vansh Pal Singh
• Application Number:
  US13/161,284
• Publication Number:
  US 20110310858A1
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/535 based on resource usage policies

Abstract

Systems and methods are described herein for managing beacon signaling in a wireless communication system. A method described herein includes identifying a neighboring macrocell and a time division multiplexing (TDM) channel offset of the neighboring macrocell, the channel offset corresponding to at least one of a signaling channel or an overhead channel; selecting a local channel offset that differs from the channel offset of the neighboring macrocell; and generating a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell; wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell and wherein the first transmissions include at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions.

Claims

1. A system for managing transmissions within a wireless communication system, the system comprising:

a neighbor cell analysis module configured to identify a neighboring macrocell and a time division multiplexing (TDM) channel offset of the neighboring macrocell, the channel offset corresponding to at least one of a signaling channel or an overhead channel;

an offset selection module communicatively coupled to the neighbor cell analysis module and configured to select a local channel offset that differs from the channel offset of the neighboring macrocell; and

a scheduler module communicatively coupled to the neighbor cell analysis module and the offset selection module and configured to generate a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell;

wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell; and

wherein the first transmissions comprise at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions.

2. The system of claim 1 wherein the offset selection module is further configured to select the local channel offset such that a distance in time between the local channel offset and the channel offset of the neighboring macrocell is maximized.

3. The system of claim 2 wherein the channel offset of the neighboring macrocell is an integer N between 0 and 3 and the local channel offset is selected according to (N+2) mod 4.

4. The system of claim 1 wherein the scheduler module is further configured to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the neighboring macrocell that correspond to interlaces in which no data are locally transmitted.

5. The system of claim 1 wherein the scheduler module is further configured to schedule the first transmissions for a warmup period preceding a time interval corresponding to a synchronous control channel (SCC) boundary of the neighboring macrocell.

6. The system of claim 5 wherein the scheduler module is further configured to extend the warmup period beyond the time interval corresponding to the SCC boundary of the neighboring macrocell as a function of neighbor list size indicated by the neighboring macrocell.

7. The system of claim 1 wherein the scheduler module is further configured to schedule pilot and traffic burst transmissions at each local channel slot defined according to the local channel offset.

8. The system of claim 7 wherein the scheduler module is further configured to schedule pilot burst transmissions at one or more of a first half-slot immediately preceding each local channel slot or a second half-slot immediately following each local channel slot.

9. The system of claim 1 wherein the neighboring macrocell is a strongest neighboring macrocell.

10. The system of claim 1 wherein the neighbor cell analysis module is further configured to identify a plurality of neighboring macrocells and a plurality of TDM channel offsets of the neighboring macrocells and the scheduler module is further configured to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the plurality of neighboring macrocells as determined according to channel offsets of the plurality of neighboring macrocells.

11. A method comprising:

identifying a neighboring macrocell and a time division multiplexing (TDM) channel offset of the neighboring macrocell, the channel offset corresponding to at least one of a signaling channel or an overhead channel;

selecting a local channel offset that differs from the channel offset of the neighboring macrocell; and

generating a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell;

wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell; and

wherein the first transmissions comprise at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions.

12. The method of claim 11 wherein selecting the local channel offset comprises selecting the local channel offset such that a distance in time between the local channel offset and the channel offset of the neighboring macrocell is maximized.

13. The method of claim 12 wherein the channel offset of the neighboring macrocell is an integer N between 0 and 3 and selecting the local channel offset comprises selecting the local channel offset according to (N+2) mod 4.

14. The method of claim 11 wherein generating the transmission schedule comprises generating the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the neighboring macrocell that correspond to interlaces in which no data are locally transmitted.

15. The method of claim 11 wherein generating the transmission schedule comprises scheduling the first transmissions for a warmup period preceding a time interval corresponding to a synchronous control channel (SCC) boundary of the neighboring macrocell.

16. The method of claim 15 wherein generating the transmission schedule further comprises extending the warmup period beyond the time interval corresponding to the SCC boundary of the neighboring macrocell as a function of neighbor list size indicated by the neighboring macrocell.

17. The method of claim 11 wherein generating the transmission schedule comprises scheduling pilot and traffic burst transmissions at each local channel slot defined according to the local channel offset.

18. The method of claim 17 wherein generating the transmission schedule further comprises scheduling pilot burst transmissions at one or more of a first half-slot immediately preceding each local channel slot or a second half-slot immediately following each local channel slot.

19. The method of claim 11 wherein the neighboring macrocell is a strongest neighboring macrocell.

20. The method of claim 11 wherein the identifying comprises identifying a plurality of neighboring macrocells and a plurality of TDM channel offsets of the neighboring macrocells and generating the transmission schedule comprises generating the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the plurality of neighboring macrocells as determined according to channel offsets of the plurality of neighboring macrocells.

21. A system for controlling interference associated with transmissions within a wireless communication system, the system comprising:

means for identifying a neighboring macrocell;

means for identifying a time division multiplexing (TDM) channel offset of the neighboring macrocell;

means for selecting a local channel offset that differs from the channel offset of the neighboring macrocell; and

means for generating a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell;

wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell; and

wherein the first transmissions comprise at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions.

22. The system of claim 21 wherein the means for selecting the local channel offset is configured to select the local channel offset such that a distance in time between the local channel offset and the channel offset of the neighboring macrocell is maximized.

23. The system of claim 22 wherein the channel offset of the neighboring macrocell is an integer N between 0 and 3 and the local channel offset is selected according to (N+2) mod 4.

24. The system of claim 21 wherein the means for generating the transmission schedule is configured to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the neighboring macrocell that correspond to interlaces in which no data are locally transmitted.

25. The system of claim 21 wherein the means for generating the transmission schedule is configured to schedule the first transmissions for a warmup period preceding a time interval corresponding to a synchronous control channel (SCC) boundary of the neighboring macrocell.

26. The system of claim 25 wherein the means for generating the transmission schedule is further configured to extend the warmup period beyond the time interval corresponding to the SCC boundary of the neighboring macrocell according to a neighbor list size indicated by the neighboring macrocell.

27. The system of claim 21 wherein the means for generating the transmission schedule is configured to schedule pilot and traffic burst transmissions at each local channel slot defined according to the local channel offset.

28. The system of claim 27 wherein the means for generating the transmission schedule is further configured to schedule pilot burst transmissions at one or more of a first half-slot immediately preceding each local channel slot or a second half-slot immediately following each local channel slot.

29. The system of claim 21 wherein the neighboring macrocell is a strongest neighboring macrocell.

30. The system of claim 21 wherein:

the means for identifying the neighboring macrocell is configured to identify a plurality of neighboring macrocells;

the means for identifying the TDM channel offset is configured to identify a plurality of TDM channel offsets of the neighboring macrocells; and

the means for generating the transmission schedule is configured to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the plurality of neighboring macrocells as determined according to channel offsets of the plurality of neighboring macrocells.

31. A computer program product residing on a processor-readable medium and comprising processor-readable instructions configured to cause a processor to:

identify a neighboring macrocell and a time division multiplexing (TDM) channel offset of the neighboring macrocell;

select a local channel offset that differs from the channel offset of the neighboring macrocell; and

generate a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell;

wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell; and

wherein the first transmissions comprise at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions.

32. The computer program product of claim 31 wherein the instructions configured to cause the processor to select the local channel offset are further configured to cause the processor to select the local channel offset such that a distance in time between the local channel offset and the channel offset of the neighboring macrocell is maximized.

33. The computer program product of claim 32 wherein the channel offset of the neighboring macrocell is an integer N between 0 and 3 and selecting the local channel offset comprises selecting the local channel offset according to (N+2) mod 4.

34. The computer program product of claim 31 wherein the instructions configured to cause the processor to generate the transmission schedule comprises instructions configured to cause the processor to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the neighboring macrocell that correspond to interlaces in which no data are locally transmitted.

35. The computer program product of claim 31 wherein the instructions configured to cause the processor to generate the transmission schedule comprises instructions configured to cause the processor to schedule the first transmissions for a warmup period preceding a time interval corresponding to a synchronous control channel (SCC) boundary of the neighboring macrocell.

36. The computer program product of claim 35 wherein the instructions configured to cause the processor to generate the transmission schedule comprises instructions configured to cause the processor to extend the warmup period beyond the time interval corresponding to the SCC boundary of the neighboring macrocell as a function of neighbor list size indicated by the neighboring macrocell.

37. The computer program product of claim 31 wherein the instructions configured to cause the processor to generate the transmission schedule comprises instructions configured to cause the processor to schedule pilot and traffic burst transmissions at each local channel slot defined according to the local channel offset.

38. The computer program product of claim 37 wherein the instructions configured to cause the processor to generate the transmission schedule comprises instructions configured to cause the processor to schedule pilot burst transmissions at one or more of a first half-slot immediately preceding each local channel slot or a second half-slot immediately following each local channel slot.

39. The computer program product of claim 31 wherein the neighboring macrocell is a strongest neighboring macrocell.

40. The computer program product of claim 31 wherein:

the instructions configured to cause the processor to identify are further configured to cause the processor to identify a plurality of neighboring macrocells and a plurality of TDM channel offsets of the neighboring macrocells; and

the instructions configured to cause the processor to generate the transmission schedule are further configured to cause the processor to generate the transmission schedule such that the first transmissions are omitted for at least a portion of the transmission intervals of the plurality of neighboring macrocells as determined according to channel offsets of the plurality of neighboring macrocells.