Radio heads and methods and systems for communicating data between radio heads

• US 20040198410A1
• Filed: 03/14/2002
• Published: 10/07/2004
• Est. Priority Date: 03/14/2002
• Status: Active Grant

• Current Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Shepherd, Johnny, Seifert, Jeff, Repice, Joseph A.
• Granted Patent: US 7,190,682 B2
• Time in Patent Office: Days
• US Class Current: 455/550.1
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence

Abstract

Radio heads, methods and systems are provided for communicating data in a radio communications system. The data communications system includes first and second radio heads. The first radio head has at least first and second transceivers. The first radio head includes a first control processor coupled with each of the at least first and second transceivers wherein the first control processor receives a first plurality of timeslots including at least one control timeslot. The first control processor reads control information from the at least one control timeslot of the first plurality of timeslots and provides the control information from the at least one control timeslot of the first plurality of timeslots to each of the first and second transceivers. Finally, the first control processor generates a second plurality of timeslots. The second radio head includes at least third and fourth transceivers. The second radio head further includes a second control processor coupled with each of the at least third and fourth transceivers wherein the second control processor receives the second plurality of timeslots including at least one control timeslot from the first control processor and reads control information from the at least one control timeslot of the second plurality of timeslots. The control processor further provides the control information from the at least one control timeslot of the second plurality of timeslots to each of the third and fourth transceivers.

Claims

1. A radio communications system comprising:

a first radio head comprising;

at least first and second transceivers; and

a first control processor coupled with each of the at least first and second transceivers wherein the first control processor receives a first plurality of timeslots including at least one control timeslot, wherein the first control processor reads control information from the at least one control timeslot of the first plurality of timeslots, wherein the first control processor provides the control information from the at least one control timeslot of the first plurality of timeslots to each of the first and second transceivers and wherein the first control processor generates a second plurality of timeslots; and

a second radio head comprising;

at least third and fourth transceivers; and

a second control processor coupled with each of the at least third and fourth transceivers wherein the second control processor receives the second plurality of timeslots including at least one control timeslot from the first control processor, wherein the second control processor reads control information from the at least one control timeslot of the second plurality of timeslots, and wherein the control processor provides the control information from the at least one control timeslot of the second plurality of timeslots to each of the third and fourth transceivers.

2. A radio communications system according to claim 1, wherein the at least one control timeslot of the first plurality of timeslots and the at least one control timeslot of the second plurality of timeslots are the same at least one control timeslot.

3. A radio communications system according to claim 2, wherein the same at least one control timeslot is communicated to the first and second radio heads over a bus.

4. A radio communications system according to claim 3, wherein the bus is an extension module regional processor (EMRP) bus that has been extended from a control cabinet to the first and second radio heads.

5. A radio communications system according to claim 4, wherein the control cabinet includes a control signaling interface and wherein the control signaling interface receives a frame of carrier data including the at least one control timeslot containing control information from a Mobile Switching Center (MSC) over at least one carrier and converts the at least one control timeslot into the EMRP bus including the control information in the at least one control timeslot.

6. A radio communications system according to claim 5, wherein the at least one carrier is at least one of T1, E1 and/or J1.

7. A radio communications system according to claim 5, wherein the control cabinet further includes an error correction interface.

8. A radio communications system according to claim 7, wherein the error correction interface comprises at least one of a Link Access Procedure on the D Channel (LAPD) interface and/or a transmission control protocol (TCP) interface.

9. A radio communications system according to claim 1, wherein the first plurality of timeslots includes at least 19 timeslots dedicated to voice and/or data.

10. A radio communications system according to claim 1, wherein the first plurality of timeslots includes at least 26 timeslots dedicated to voice and/or data.

11. A radio communications system according to claim 1, wherein the firs t control processor extracts information from the at least one control timeslot of the first plurality of timeslots and wherein the second control processor extracts information from the at least one control timeslot of the second plurality of timeslots.

12. A radio communications system according to claim 11, wherein the at least one control timeslot of the first plurality of timeslots and the at least one control timeslot of the second plurality of timeslots are the same at least one control timeslot, and wherein the information in the same at least one control timeslot changes from the first radio head to the second radio head due to the extraction of existing information from the at same least one control timeslot and the placement of new information in the same at least one control timeslot.

13. A radio communications system according to claim 1, further comprising an error correction interface between the first radio head and the second radio head.

14. A radio communications system according to claim 13, wherein the error correction interface comprises at least one of a Link Access Procedure on the D Channel (LAPD) interface and/or a transmission control protocol (TCP) interface.

21. A radio communications system according to claim 7, wherein the error correction interface comprises at least one of a Link Access Procedure on the D Channel (LAPD) interface and/or a transmission control protocol (TCP) interface.

15. A radio communications system, comprising:

a mobile switching center;

a control cabinet that communicates with the mobile switching center over a carrier bus according to a carrier protocol;

a first radio head that communicates with the control cabinet, the first radio head comprising;

a first control signal processor that processes a first plurality of timeslots including at least one dedicated control timeslot; and

a first plurality of transceivers electrically coupled to the first control signal processor, the first plurality of transceivers each receiving control information from the at least one dedicated control timeslot of the first plurality of timeslots; and

a second radio head that communicates with first radio head, the second radio head comprising;

a second control signal processor that processes a second plurality of timeslots having at least one dedicated control timeslot; and

a second plurality of transceivers electrically coupled to the second control signal processor, the second plurality of transceivers each receiving control information from the at least one dedicated control timeslot of the second plurality of timeslots.

16. A radio communications system according to claim 15, wherein the second radio head receives the second plurality of timeslots from the first radio head.

17. A radio communications system according to claim 15, wherein the at least one dedicated control timeslot of the first plurality of timeslots and the at least one dedicated control timeslot of the second plurality of timeslots are the same at least one dedicated control timeslot.

18. A radio communications system according to claim 17, wherein the same at least one control timeslot is an extension module regional processor (EMRP) bus that has been extended from the control cabinet to the first and second radio heads.

19. A radio communications system according to claim 18, wherein the control cabinet further comprises a control signaling interface that receives a frame of carrier data including the at least one control timeslot including control information from a Mobile Switching Center (MSC) over at least one carrier and converts the at least one control timeslot into the EMRP bus including the control information in the at least one control timeslot.

20. A radio communications system according to claim 19, wherein the control cabinet further includes an error correction interface.

22. A radio communications system according to claim 15, wherein the first plurality of timeslots includes at least 19 timeslots dedicated to voice and/or data.

23. A radio communications system according to claim 15, wherein the first plurality of timeslots includes at least 26 timeslots dedicated to voice and/or data

24. A radio communications system according to claim 15, wherein the first control signal processor extracts information from the at least one dedicated control timeslot of the first plurality of timeslots and wherein the second control signal processor extracts information from the at least one dedicated control timeslot of the second plurality of timeslots.

25. A radio communications system according to claim 15, wherein the at least one dedicated control timeslot of the first plurality of timeslots and the at least one control timeslot of the second plurality of timeslots are the same at least one control timeslot, and wherein the information in the same at least one control timeslot changes from the first radio head to the second radio head due to the extraction of existing information from the at same least one control timeslot of information and the placement of new information in the same at least one control timeslot of information.

26. A radio communications system according to claim 15, further comprising an error correction interface between the first radio head and the second radio head.

27. A radio communications system according to claim 26, wherein the error correction interface comprises at least one of a Link Access Procedure on the D Channel (LAPD) interface and/or a transmission control protocol (TCP) interface.

33. A radio head according to claim 19, wherein the error correction interface performs error correction on each of the plurality of timeslots.

28. A radio head, comprising:

a control signal processor that processes a plurality of timeslots including at least one dedicated control timeslot of control information; and

a plurality of transceivers electrically coupled to the control signal processor, the plurality of transceivers each receiving control information from a shared at least one dedicated control timeslot.

29. A radio head according to claim 28, wherein the at least one dedicated control timeslot is an EMRP bus including the control information and wherein the plurality of transceivers each receive the control information from the EMRP bus.

30. A radio head according to claim 29 further comprising:

an error correction interface that processes the control information from the EMRP bus before the plurality of timeslots is communicated to the control signal processor.

31. A radio head according to claim 30, further comprising a router that determines which of a plurality of timeslots are addressed to the radio head.

32. A radio head according to claim 31, wherein the error correction interface only performs error correction on the plurality of timeslots that are addressed to the radio head.

34. A method for communicating data in a radio communications system including a first radio head and a second radio head, the first radio head having first and second transceivers and a first control processor coupled to the first and second transceivers and the second radio head having third and fourth transceivers and a second control processor coupled to the third and fourth transceivers, the method comprising:

receiving a first plurality of timeslots including at least one control timeslot of control information at the first control processor;

providing the at least one control timeslot of control information of the first plurality of control timeslots to each of the first and second transceivers;

generating a second plurality of timeslots at the first control processor;

receiving the second plurality of timeslots from the first control processor at the second control processor including at least one control timeslot of control information; and

providing the at least one control timeslot of control information of the second plurality of control timeslots to each of the third and fourth transceivers.

35. A method according to claim 34, wherein the at least one control timeslot of the first plurality of timeslots and the at least one control timeslot of the second plurality of timeslots are the same at least one control timeslot and wherein the same at least one control timeslot is a bus.

36. A method according to claim 35, wherein the bus is an EMRP bus that has been extended from a control cabinet to the first and second radio heads.

37. A method according to claim 36, further comprising extracting information from the EMRP bus.

38. A method according to claim 34, further comprising:

extracting information from at least one data timeslot of the first plurality of timeslots; and

replacing the extracted information with new information in the at least one data timeslot to provide the second plurality of timeslots.

39. A method according to claim 34, further comprising:

receiving a first frame of carrier data at a control cabinet from a Mobile Switching Center (MSC) over a carrier through a control signaling interface, wherein the first frame is divided into a plurality of timeslots including at least one control timeslot of control information, and wherein the control signaling interface converts the at least one control timeslot of control information into an EMRP bus including the control information; and

transmitting the EMRP bus and a plurality of voice and/or data timeslots to the first radio head.

40. A method according to claim 39, wherein the plurality of voice and/or data timeslots includes at least 19 voice and/or data timeslots.

41. A method according to claim 39, wherein the plurality of voice and/or data timeslots includes at least 26 voice and/or data timeslots.

42. A method of communicating in a radio communications system, the radio communications system including a mobile switching center, a control cabinet including a control signaling interface, a first radio head and a second radio head, the method comprising:

receiving a frame of carrier data from the mobile switching center at the control signaling interface, wherein the first frame is divided into a plurality of timeslots including at least one control timeslot of control information, and wherein the control signaling interface converts the at least one control timeslot of control information into an EMRP bus including the control information;

communicating the EMRP bus and a first plurality of voice and/or data timeslots to the first radio head;

processing the control information on the EMRP bus at the first radio head;

communicating the control information to each of a first plurality of transceivers;

generating a second plurality of voice and/or data timeslots;

communicating the EMRP bus and the second plurality of voice and/or data timeslots to the second radio head;

processing the control information on the EMRP bus at the second radio head; and

communicating the control information to each of a second plurality of transceivers.

43. A method according to claim 42, wherein the first plurality of voice and/or data includes at least 19 voice and/or data timeslots.

44. A method according to claim 42, wherein the first plurality of voice and/or data timeslots include at least 26 voice and/or data timeslots.

45. A method according to claim 42, further comprising extracting control information from EMRP bus.

46. A method according to claim 42, further comprising:

extracting information from at least one of the first plurality of voice and/or data timeslots; and

replacing the extracted information with new information in the at least one of the voice and/or data timeslots to provide the second plurality of voice and/or data timeslots.