System and method for cellular beam spectrum management

• US 5,745,841 A
• Filed: 05/20/1996
• Issued: 04/28/1998
• Est. Priority Date: 05/20/1996
• Status: Expired due to Term

• Current Assignee: F Poszat Hu LLC (Intellectual Ventures LLC)
• Original Assignee: Metawave Communications Corp.
• Inventors: Reudink, Douglas O., Reudink, Mark
• Primary Examiner(s): Au, Amelia
• Application Number:
  US08/651,981
• Time in Patent Office: 708 Days
• Field of Search: 455/422, 455/423, 455/424, 455/450, 455/452, 455/62, 455/63, 455/67.1, 455/226.1, 455/227.1, 455/227.2, 455/65, 455/561, 455/562
• US Class Current: 455/62
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A system and method for continuously managing antenna beam assignment for a particular channel in a cell is disclosed. Reception conditions on the antenna beams are continuously monitored whereby wireless communications are initially assigned antenna beams based on reference, in part, to the currently prevailing reception conditions. Antenna beam assignment for continuing wireless communication is periodically updated based reference, in part, to subsequently prevailing reception conditions.

Claims

1. A method for continuously managing a plurality of antenna beams to service wireless communications in progress on one channel of a plurality of channels, said method comprising the steps of:

continuously monitoring signal reception conditions on ones of the antenna beams;

detecting commencement of a wireless communication on the channel, said wireless communication thereupon becoming a managed communication;

assigning ones of the antenna beams to the managed communication according to a regime of predetermined beam assignment rules, said regime responsive to currently monitored signal reception conditions in applying said beam assignment rules; and

periodically updating said beam assignments in accordance with the regime in light of subsequently monitored signal reception conditions including a comparison of at least one of said subsequently monitored signal reception conditions to a preselected threshold.

2. The method of claim 1, in which the plurality of channels operate in a broadcast signal environment selected from the group consisting of:

(a) digital signal, Time Division Multiple Access (TDMA) mode; and

(b) analog signal mode.

3. The method of claim 1, in which the monitoring step includes the substep of periodically measuring received signal strength on ones of the antenna beams.

4. The method of claim 3, in which the regime includes a descending hierarchy of antenna beams arranged in decreasing order of measured received signal strength.

5. The method of claim 4, in which said assigning step includes assigning said ones of the antenna beams in sequence starting with the beam with strongest measured received signal strength and continuing in order of the descending hierarchy.

6. The method of claim 5, in which said updating step includes the substeps of:

periodically comparing the identity of the beams currently assigned to the managed communication with the identity of the current strongest beams in the descending hierarchy; and

if necessary, making one or more beam reassignments so as to maintain the current strongest beams in the descending hierarchy assigned to the managed communication, said reassignments thereby identifying replacing beams to be substituted for corresponding replaced beams.

7. The method of claim 6, in which the regime of predetermined beam assignment rules requires that beam reassignments may only be made when the measured received signal strength on the replacing beam exceeds the measured received signal strength on the replaced beam by a preselected amount.

8. The method of claim 7, in which said preselected amount is approximately 3 dB.

9. The method of claim 6, in which said beam reassignment substep further includes the substeps of:

initially verifying that the managed communication has not been terminated; and

initially verifying that the measured received signal strength on replacing beams exceeds a first threshold value.

10. The method of claim 9, in which the first threshold value is approximately -60 dBm.

11. The method of claim 9, in which said initial signal strength verification substep includes the substep of:

in cases where the managed communication has not been terminated and for replacing beams whose measured received signal strength does not exceed the first threshold value, verifying prior to beam reassignment that the source of the measured received signal strength on said replacing beams is the managed communication.

12. The method of claim 11, in which said source verification substep is made on a first priority basis for replacing beams whose antenna coverage does not neighbor a beam currently assigned to the managed communication, and is made on a second priority basis for replacing beams whose antenna coverage does neighbor a beam currently assigned to the managed communication.

13. The method of claim 11, in which said source verification substep further includes the substeps of:

replacing beams whose source of received signal strength is determined not to be the managed communication, (a) designating said replacing beams ineligible for any further assignment to the managed communication until designated eligible again, and (b) maintaining the current beam assignments for the managed communication.

14. The method of claim 13, in which said source verification substep further includes the substep of periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

15. The method of claim 14, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

16. The method of claim 9, in which said initial managed communication termination verification substep includes the substep of:

in cases where the managed communication has been terminated, designating ineligible those replacing beams whose measured received signal strength exceeds a second threshold value for a predetermined period of time, said ineligible designation precluding any further assignment to the managed communication until designated eligible again.

17. The method of claim 16, in which the second threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

18. The method of claim 16, in which said initial managed communication termination verification substep further includes the substep of periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

19. The method of claim 18, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

20. The method of claim 1, in which the regime of predetermined beam assignment rules requires that any beam assigned to the managed communication whose measured received signal strength falls below a third threshold value for a predetermined period of time be re-assigned to a beam whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication.

21. The method of claim 20, in which the third threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

22. The method of claim 20, further comprising the step of intervening if no replacing beam is available whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication, said intervening step including one or more actions taken from the group of actions consisting of:

(a) changing the channel to any open channel among said plurality of channels;

(b) handing off the managed communication to be serviced elsewhere;

(c) forcing an alternate wireless communication, said alternate wireless communication being under common channel control and antenna beam control with the managed communication, to be handed off to be serviced elsewhere and then servicing the managed communication in place thereof; and

(d) exchanging channels with a switchable wireless communication, said switchable wireless communication being under common channel control and antenna beam control with the managed communication.

23. The method of claim 6, in which said updating step further includes the substep of periodically validating the source of measured received signal strength on beams assigned to the managed communication at times when no beam reassignment is made following said comparing step, said validating substep comprising the substeps of:

(a) initially determining whether the managed communication has been terminated; and

(b) if the managed communication has not been terminated,

(i) periodically verifying according to a predetermined schedule that the source of the measured received signal strength on beams assigned to the managed communication is the managed communication, and

(ii) if said source is not the managed communication, designating ineligible those beams assigned to the managed communication and re-assigning thereto the next strongest beams in the descending hierarchy, said ineligible designation precluding any further beam assignment to the managed communication until designated eligible again.

24. The method of claim 23, in which said predetermined schedule is approximately every 3 seconds.

25. The method of claim 23, in which said validation step further includes the substep of periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

26. The method of claim 25, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

27. A method for continuously managing a plurality of antenna beams to service wireless communications in progress on one channel of a plurality of channels, said method comprising the steps of:

(a) continuously monitoring signal reception conditions on ones of the antenna beams, said monitoring step including the substep of periodically measuring received signal strength on ones of the antenna beams;

(b) detecting commencement of a wireless communication on the channel, said wireless communication thereupon becoming a managed communication;

(c) assigning ones of the antenna beams to the managed communication according to a regime of predetermined beam assignment rules, said regime responsive to currently monitored signal reception conditions in applying said beam assignment rules, said regime including a descending hierarchy of antenna beams arranged in decreasing order of measured received signal strength, said assigning step including assigning said ones of the antenna beams in sequence starting with the beam with strongest measured received signal strength and continuing in order of the descending hierarchy;

(d) periodically updating said beam assignments in accordance with the regime in light of subsequently monitored signal reception conditions, said updating step including the substeps of;

(i) periodically comparing the identity of the beams currently assigned to the managed communication with the identity of the current strongest beams in the descending hierarchy; and

(ii) if necessary, making one or more beam reassignments so as to maintain the current strongest beams in the descending hierarchy assigned to the managed communication, said reassignments thereby identifying replacing beams to be substituted for corresponding replaced beams, the regime of predetermined beam assignment rules requiring that beam reassignments may only be made when the measured received signal strength on the replacing beam exceeds the measured received signal strength on the replaced beam by a preselected amount, said beam reassignment substep comprising the substeps of;

(1) initially determining whether the managed communication has been terminated;

(2) in cases where the managed communication has been terminated, designating ineligible those replacing beams whose measured received signal strength exceeds a first threshold value for a predetermined period of time, said ineligible designation precluding any further assignment to the managed communication until designated eligible again;

(3) in cases where the managed communication has not been terminated, verifying that the measured received signal strength on replacing beams exceeds a second threshold value;

(4) in cases where the managed communication has not been terminated and for replacing beams whose measured received signal strength does not exceed the second threshold value, verifying prior to beam reassignment that the source of the measured received signal strength on said replacing beams is the managed communication, said source verifying substep made on a first priority basis for replacing beams whose antenna coverage does not neighbor a beam currently assigned to the managed communication, and on a second priority basis for replacing beams whose antenna coverage does neighbor a beam currently assigned to the managed communication; and

(5) for replacing beams whose source of received signal strength is determined not to be the managed communication, (A) designating said replacing beams ineligible for any further assignment to the managed communication until designated eligible again, and (B) maintaining the current beam assignments for the managed communication; and

(iii) periodically validating the source of measured received signal strength on beams assigned to the managed communication at times when no beam reassignment is made following said comparing step, said validating substep comprising the substeps of;

(1) initially verifying that the managed communication has been terminated; and

(2) if the managed communication has not been terminated, (A) periodically verifying according to a predetermined schedule that the source of the measured received signal strength on beams assigned to the managed communication is the managed communication, and (B) if said source is not the managed communication, designating ineligible beams assigned to the managed communication and reassigning thereto the next strongest beams in the descending hierarchy, said ineligible designation precluding any further beam assignment to the managed communication until designated eligible again;

(e) periodically checking beams currently assigned to the managed communication for low signal strength, said checking step including the substep of re-assigning any beam assigned to the managed communication whose measured received signal strength falls below a third threshold value for a predetermined period of time to a replacing beam whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication, said checking step further including the substep of intervening if no replacing beam is available whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication, said intervening substep including one or more actions taken from the group of actions consisting of;

(i) changing the channel to any open channel among said plurality of channels;

(ii) handing off the managed communication to be serviced elsewhere;

(iii) forcing an alternate wireless communication, said alternate wireless communication being under common channel control and antenna beam control with the managed communication, to be handed off to be serviced elsewhere and then servicing the managed communication in place thereof; and

(iv) exchanging channels with a switchable wireless communication, said switchable wireless communication being under common channel control and antenna beam control with the managed communication; and

(f) periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

28. The method of claim 27, in which the plurality of channels operate in a broadcast signal environment selected from the group consisting of:

(a) digital signal, Time Division Multiple Access (TDMA) mode; and

(b) analog signal mode.

29. A system for continuously managing a plurality of antenna beams to service wireless communications in progress on one channel of a plurality of channels, said system comprising:

means for continuously monitoring signal reception conditions on ones of the antenna beams;

means for detecting commencement of a wireless communication on the channel, said wireless communication thereupon becoming a managed communication;

means for assigning ones of the antenna beams to the managed communication according to a regime of predetermined beam assignment rules, said regime responsive to currently monitored signal reception conditions in applying said beam assignment rules;

means for designating ones of the antenna beams ineligible for assignment to the managed communication responsive to said currently monitored signal reception conditions, wherein said designating means is operable to designate as ineligible said antenna beams regardless of said currently monitored signal reception conditions being suitable for assignment to the managed communication according to said regime of predetermined beam assignment rules; and

means for periodically updating said beam assignments in accordance with the regime in light of subsequently monitored signal reception conditions.

30. The system of claim 29, in which the plurality of channels operate in a broadcast signal environment selected from the group consisting of:

(a) digital signal, Time Division Multiple Access (TDMA) mode; and

(b) analog signal mode.

31. The system of claim 29, in which the monitoring step includes the substep of periodically measuring received signal strength on ones of the antenna beams.

32. The system of claim 31, in which the regime includes a descending hierarchy of antenna beams arranged in decreasing order of measured received signal strength.

33. The system of claim 32, in which said means for assigning includes means for assigning said ones of the antenna beams in sequence starting with the beam with strongest measured received signal strength and continuing in order of the descending hierarchy.

34. The system of claim 33, in which said means for updating includes:

means for periodically comparing the identity of the beams currently assigned to the managed communication with the identity of the current strongest beams in the descending hierarchy; and

means for one or more beam reassignments, if necessary, so as to maintain the current strongest beams in the descending hierarchy assigned to the managed communication, said reassignments thereby identifying replacing beams to be substituted for corresponding replaced beams.

35. The system of claim 34, in which the regime of predetermined beam assignment rules requires that beam reassignments may only be made when the measured received signal strength on the replacing beam exceeds the measured received signal strength on the replaced beam by a preselected amount.

36. The system of claim 35, in which said preselected amount is approximately 3 dB.

37. The system of claim 34, in which said means for beam reassignment further includes:

means for initially verifying that the managed communication has not been terminated; and

means for initially verifying that the measured received signal strength on replacing beams exceeds a first threshold value.

38. The system of claim 37, in which the first threshold value is approximately -60 dBm.

39. The system of claim 37, in which said means for verifying initial signal strength includes:

in cases where the managed communication has not been terminated and for replacing beams whose measured received signal strength does not exceed the first threshold value, means for verifying prior to beam reassignment that the source of the measured received signal strength on said replacing beams is the managed communication.

40. The system of claim 39, in which said means for verifying source operates on a first priority basis with respect to replacing beams whose antenna coverage does not neighbor a beam currently assigned to the managed communication, and on a second priority basis with respect to replacing beams whose antenna coverage does neighbor a beam currently assigned to the managed communication.

41. The system of claim 39, in which said means for verifying source further includes:

in cases where the managed communication has not been terminated and for replacing beams whose source of received signal strength is determined not to be the managed communication, (a) means for designating said replacing beams ineligible for any further assignment to the managed communication until designated eligible again, and (b) means for maintaining the current beam assignments for the managed communication.

42. The system of claim 41, in which said means for verifying source further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

43. The system of claim 42, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

44. The system of claim 37, in which said means for verifying initial managed communication termination includes:

in cases where the managed communication has been terminated, means for designating ineligible those replacing beams whose measured received signal strength exceeds a second threshold value for a predetermined period of time, said ineligible designation precluding any further assignment to the managed communication until designated eligible again.

45. The system of claim 44, in which the second threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

46. The system of claim 44, in which said means for verifying initial managed communication termination further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

47. The system of claim 46, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

48. The system of claim 29, in which the regime of predetermined beam assignment rules requires that any beam assigned to the managed communication whose measured received signal strength falls below a third threshold value for a predetermined period of time be re-assigned to a beam whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication.

49. The system of claim 48, in which the third threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

50. The system of claim 48, further comprising means for intervening if no replacing beam is available whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication, said means for intervening operating to effect one or more actions taken from the group consisting of:

(a) changing the channel to any open channel among said plurality of channels;

(b) handing off the managed communication to be serviced elsewhere;

(c) forcing an alternate wireless communication, said alternate wireless communication being under common channel control and antenna beam control with the managed communication, to be handed off to be serviced elsewhere and then servicing the managed communication in place thereof; and

(d) exchanging channels with a switchable wireless communication, said switchable wireless communication being under common channel control and antenna beam control with the managed communication.

51. The system of claim 34, in which said means for updating further includes means for periodically validating the source of measured received signal strength on beams assigned to the managed communication at times when no beam reassignment is made following operation of said means for comparing, said means for validating comprising:

(a) means for initially determining whether the managed communication has been terminated; and

(b) if the managed communication has not been terminated,

(i) means for periodically verifying according to a predetermined schedule that the source of the measured received signal strength on beams assigned to the managed communication is the managed communication, and

(ii) if said source is not the managed communication, means for designating ineligible those beams assigned to the managed communication and means for reassigning thereto the next strongest beams in the descending hierarchy, said ineligible designation precluding any further beam assignment to the managed communication until designated eligible again.

52. The system of claim 51, in which said predetermined schedule is approximately every 3 seconds.

53. The system of claim 51, in which said means for validating further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

54. The system of claim 53, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

55. A computer program product having a computer readable medium on which computer readable logic is recorded for continuously managing a plurality of antenna beams to service wireless communications in progress on one channel of a plurality of channels, said computer program product operable in a computer system having a processor and a memory and a display device, said computer program product comprising:

a computer readable storage medium; and

a computer program stored on said storage medium comprising;

means for continuously monitoring signal reception conditions on ones of the antenna beams;

means for detecting commencement of a wireless communication on the channel, said wireless communication thereupon becoming a managed communication;

means for assigning ones of the antenna beams to the managed communication according to a regime of predetermined beam assignment rules, said regime responsive to currently monitored signal reception conditions in applying said beam assignment rules; and

means for periodically updating said beam assignments in accordance with the regime in light of subsequently monitored signal reception conditions including a comparison of at least one of said subsequently monitored signal reception conditions to a preselected threshold.

56. The computer program product of claim 55, in which the plurality of channels operate in a broadcast signal environment selected from the group consisting of:

(a) digital signal, Time Division Multiple Access (TDMA) mode; and

(b) analog signal mode.

57. The computer program product of claim 55, in which the monitoring step includes the substep of periodically measuring received signal strength on ones of the antenna beams.

58. The computer program product of claim 57, in which the regime includes a descending hierarchy of antenna beams arranged in decreasing order of measured received signal strength.

59. The computer program product of claim 58, in which said means for assigning includes means for assigning said ones of the antenna beams in sequence starting with the beam with strongest measured received signal strength and continuing in order of the descending hierarchy.

60. The computer program product of claim 59, in which said means for updating includes:

means for periodically comparing the identity of the beams currently assigned to the managed communication with the identity of the current strongest beams in the descending hierarchy; and

means for one or more beam reassignments, if necessary, so as to maintain the current strongest beams in the descending hierarchy assigned to the managed communication, said reassignments thereby identifying replacing beams to be substituted for corresponding replaced beams.

61. The computer program product of claim 60, in which the regime of predetermined beam assignment rules requires that beam reassignments may only be made when the measured received signal strength on the replacing beam exceeds the measured received signal strength on the replaced beam by a preselected amount.

62. The computer program product of claim 61, in which said preselected amount is approximately 3 dB.

63. The computer program product of claim 60, in which said means for beam reassignment further includes:

means for initially verifying that the managed communication has not been terminated; and

means for initially verifying that the measured received signal strength on replacing beams exceeds a first threshold value.

64. The computer program product of claim 63, in which the first threshold value is approximately -60 dBm.

65. The computer program product of claim 63, in which said means for verifying initial signal strength includes:

in cases where the managed communication has not been terminated and for replacing beams whose measured received signal strength does not exceed the first threshold value, means for verifying prior to beam reassignment that the source of the measured received signal strength on said replacing beams is the managed communication.

66. The computer program product of claim 65, in which said means for verifying source operates on a first priority basis with respect to replacing beams whose antenna coverage does not neighbor a beam currently assigned to the managed communication, and on a second priority basis with respect to replacing beams whose antenna coverage does neighbor a beam currently assigned to the managed communication.

67. The computer program product of claim 65, in which said means for verifying source further includes:

for replacing beams whose source of received signal strength is determined not to be the managed communication, (a) means for designating said replacing beams ineligible for any further assignment to the managed communication until designated eligible again, and (b) means for maintaining the current beam assignments for the managed communication.

68. The computer program product of claim 67, in which said means for verifying source further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

69. The computer program product of claim 68, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

70. The computer program product of claim 63, in which said means for verifying initial managed communication termination includes:

in cases where the managed communication has been terminated, means for designating ineligible those replacing beams whose measured received signal strength exceeds a second threshold value for a predetermined period of time, said ineligible designation precluding any further assignment to the managed communication until designated eligible again.

71. The computer program product of claim 70, in which the second threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

72. The computer program product of claim 70, in which said means for verifying initial managed communication termination further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

73. The computer program product of claim 72, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.

74. The computer program product of claim 55, in which the regime of predetermined beam assignment rules requires that any beam assigned to the managed communication whose measured received signal strength falls below a third threshold value for a predetermined period of time be re-assigned to a beam whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication.

75. The computer program product of claim 74, in which the third threshold value is approximately -110 dBm and the predetermined period of time is approximately 3 seconds.

76. The computer program product of claim 74, further comprising means for intervening if no replacing beam is available whose measured received signal strength is at least the third threshold value and whose source of measured received signal strength is verified to be the managed communication, said means for intervening operating to effect one or more actions taken from the group consisting of:

(a) changing the channel to any open channel among said plurality of channels;

(b) handing off the managed communication to be serviced elsewhere;

(c) forcing an alternate wireless communication, said alternate wireless communication being under common channel control and antenna beam control with the managed communication, to be handed off to be serviced elsewhere and then servicing the managed communication in place thereof; and

(d) exchanging channels with a switchable wireless communication, said switchable wireless communication being under common channel control and antenna beam control with the managed communication.

77. The computer program product of claim 60, in which said means for updating further includes means for periodically validating the source of measured received signal strength on beams assigned to the managed communication at times when no beam reassignment is made following operation of said means for comparing, said means for validating comprising:

(a) means for initially determining whether the managed communication has been terminated; and

(b) if the managed communication has not been terminated,

(i) means for periodically verifying according to a predetermined schedule that the source of the measured received signal strength on beams assigned to the managed communication is the managed communication, and

(ii) if said source is not the managed communication, means for designating ineligible those beams assigned to the managed communication and means for reassigning thereto the next strongest beams in the descending hierarchy, said ineligible designation precluding any further beam assignment to the managed communication until designated eligible again.

78. The computer program product of claim 77, in which said predetermined schedule is approximately every 3 seconds.

79. The computer program product of claim 77, in which said means for validating further includes means for periodically designating eligible again ineligible beams (1) whose source of received signal strength is subsequently verified to be the managed communication, or (2) whose received signal strength falls below a preselected interference threshold for a preselected period of time.

80. The computer program product of claim 79, in which said preselected interference threshold is approximately -110 dBm and said preselected period of time is approximately 3 seconds.