在我对iBeacons的RSSI检测可靠性进行调查时，我发现RSSI频率在前景和后台模式之间存在极大差异。
我的设定： 在场地（自动售货机）中设置两个信标，广播相同的UUID和Major，但不同的Minors =＆gt;使用UUID和Major定义的区域。
用例1： 用我的智能手机放在口袋里（在后台运行应用程序）接近场地。在场地（距离1.5米）前停留15秒。
用例2： 用我的智能手机接近场地，在前台运行应用程序。在场地（距离1.5米）前停留15秒。
测试用例1的日志：
[2016-03-07 16:22:31] lumen.INFO: Range Beacon [2016-03-07 16:22:31] Maj.: 16 0
[2016-03-07 16:22:32] lumen.INFO: Range Beacon [2016-03-07 16:22:32] Maj.: 16 0
[2016-03-07 16:22:33] lumen.INFO: Range Beacon [2016-03-07 16:22:33] Maj.: 16 0
[2016-03-07 16:22:34] lumen.INFO: Range Beacon [2016-03-07 16:22:34] Maj.: 16 0
[2016-03-07 16:22:50] lumen.INFO: Range Beacon [2016-03-07 16:22:50] Maj.: 16 18446744073709551527
[2016-03-07 16:22:51] lumen.INFO: Range Beacon [2016-03-07 16:22:51] Maj.: 30 0
[2016-03-07 16:22:51] lumen.INFO: Range Beacon [2016-03-07 16:22:51] Maj.: 16 0
[2016-03-07 16:22:52] lumen.INFO: Range Beacon [2016-03-07 16:22:52] Maj.: 30 0
[2016-03-07 16:22:52] lumen.INFO: Range Beacon [2016-03-07 16:22:52] Maj.: 16 0
[2016-03-07 16:22:53] lumen.INFO: Range Beacon [2016-03-07 16:22:53] Maj.: 30 0
[2016-03-07 16:22:53] lumen.INFO: Range Beacon [2016-03-07 16:22:53] Maj.: 16 0
[2016-03-07 16:22:54] lumen.INFO: Range Beacon [2016-03-07 16:22:54] Maj.: 30 0
[2016-03-07 16:22:54] lumen.INFO: Range Beacon [2016-03-07 16:22:54] Maj.: 16 0
[2016-03-07 16:22:55] lumen.INFO: Range Beacon [2016-03-07 16:22:55] Maj.: 30 0
[2016-03-07 16:22:55] lumen.INFO: Range Beacon [2016-03-07 16:22:55] Maj.: 16 0
[2016-03-07 16:22:56] lumen.INFO: Range Beacon [2016-03-07 16:22:56] Maj.: 16 0
[2016-03-07 16:22:56] lumen.INFO: Range Beacon [2016-03-07 16:22:56] Maj.: 30 0
[2016-03-07 16:22:57] lumen.INFO: Range Beacon [2016-03-07 16:22:57] Maj.: 30 0
[2016-03-07 16:22:57] lumen.INFO: Range Beacon [2016-03-07 16:22:57] Maj.: 16 0
[2016-03-07 16:22:58] lumen.INFO: Range Beacon [2016-03-07 16:22:58] Maj.: 16 0
[2016-03-07 16:22:58] lumen.INFO: Range Beacon [2016-03-07 16:22:58] Maj.: 30 0
[2016-03-07 16:22:59] lumen.INFO: Range Beacon [2016-03-07 16:22:59] Maj.: 30 0
[2016-03-07 16:22:59] lumen.INFO: Range Beacon [2016-03-07 16:22:59] Maj.: 16 0
用例2的测距日志：
[2016-03-07 16:51:04] lumen.INFO: Range Beacon [2016-03-07 16:51:04] Maj.: 30 0
[2016-03-07 16:51:04] lumen.INFO: Range Beacon [2016-03-07 16:51:04] Maj.: 16 18446744073709551521
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 30 0
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 16 18446744073709551521
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 30 0
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 16 18446744073709551524
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 30 0
[2016-03-07 16:51:05] lumen.INFO: Range Beacon [2016-03-07 16:51:05] Maj.: 16 18446744073709551524
[2016-03-07 16:51:06] lumen.INFO: Range Beacon [2016-03-07 16:51:06] Maj.: 30 18446744073709551518
[2016-03-07 16:51:06] lumen.INFO: Range Beacon [2016-03-07 16:51:06] Maj.: 16 18446744073709551528
[2016-03-07 16:51:07] lumen.INFO: Range Beacon [2016-03-07 16:51:07] Maj.: 30 18446744073709551520
[2016-03-07 16:51:07] lumen.INFO: Range Beacon [2016-03-07 16:51:07] Maj.: 16 18446744073709551533
[2016-03-07 16:51:08] lumen.INFO: Range Beacon [2016-03-07 16:51:08] Maj.: 30 18446744073709551525
[2016-03-07 16:51:08] lumen.INFO: Range Beacon [2016-03-07 16:51:08] Maj.: 16 18446744073709551538
[2016-03-07 16:51:09] lumen.INFO: Range Beacon [2016-03-07 16:51:09] Maj.: 30 18446744073709551525
[2016-03-07 16:51:09] lumen.INFO: Range Beacon [2016-03-07 16:51:09] Maj.: 16 18446744073709551538
[2016-03-07 16:51:10] lumen.INFO: Range Beacon [2016-03-07 16:51:10] Maj.: 30 18446744073709551521
[2016-03-07 16:51:10] lumen.INFO: Range Beacon [2016-03-07 16:51:10] Maj.: 16 18446744073709551536
[2016-03-07 16:51:11] lumen.INFO: Range Beacon [2016-03-07 16:51:11] Maj.: 30 18446744073709551522
[2016-03-07 16:51:11] lumen.INFO: Range Beacon [2016-03-07 16:51:11] Maj.: 16 18446744073709551535
[2016-03-07 16:51:12] lumen.INFO: Range Beacon [2016-03-07 16:51:12] Maj.: 30 18446744073709551523
[2016-03-07 16:51:12] lumen.INFO: Range Beacon [2016-03-07 16:51:12] Maj.: 16 18446744073709551536
[2016-03-07 16:51:13] lumen.INFO: Range Beacon [2016-03-07 16:51:13] Maj.: 30 18446744073709551522
[2016-03-07 16:51:13] lumen.INFO: Range Beacon [2016-03-07 16:51:13] Maj.: 16 18446744073709551534
[2016-03-07 16:51:14] lumen.INFO: Range Beacon [2016-03-07 16:51:14] Maj.: 30 18446744073709551522
[2016-03-07 16:51:14] lumen.INFO: Range Beacon [2016-03-07 16:51:14] Maj.: 16 18446744073709551534
[2016-03-07 16:51:15] lumen.INFO: Range Beacon [2016-03-07 16:51:15] Maj.: 30 18446744073709551522
[2016-03-07 16:51:15] lumen.INFO: Range Beacon [2016-03-07 16:51:15] Maj.: 16 18446744073709551535
[2016-03-07 16:51:16] lumen.INFO: Range Beacon [2016-03-07 16:51:16] Maj.: 30 18446744073709551522
[2016-03-07 16:51:16] lumen.INFO: Range Beacon [2016-03-07 16:51:16] Maj.: 16 18446744073709551537
[2016-03-07 16:51:17] lumen.INFO: Range Beacon [2016-03-07 16:51:17] Maj.: 30 18446744073709551522
[2016-03-07 16:51:17] lumen.INFO: Range Beacon [2016-03-07 16:51:17] Maj.: 16 18446744073709551535
[2016-03-07 16:51:18] lumen.INFO: Range Beacon [2016-03-07 16:51:18] Maj.: 30 18446744073709551521
[2016-03-07 16:51:18] lumen.INFO: Range Beacon [2016-03-07 16:51:18] Maj.: 16 18446744073709551535
[2016-03-07 16:51:19] lumen.INFO: Range Beacon [2016-03-07 16:51:19] Maj.: 30 18446744073709551521
[2016-03-07 16:51:19] lumen.INFO: Range Beacon [2016-03-07 16:51:19] Maj.: 16 18446744073709551535
[2016-03-07 16:51:20] lumen.INFO: Range Beacon [2016-03-07 16:51:20] Maj.: 30 18446744073709551521
[2016-03-07 16:51:20] lumen.INFO: Range Beacon [2016-03-07 16:51:20] Maj.: 16 18446744073709551534
[2016-03-07 16:51:21] lumen.INFO: Range Beacon [2016-03-07 16:51:21] Maj.: 30 18446744073709551522
[2016-03-07 16:51:21] lumen.INFO: Range Beacon [2016-03-07 16:51:21] Maj.: 16 18446744073709551534
[2016-03-07 16:51:22] lumen.INFO: Range Beacon [2016-03-07 16:51:22] Maj.: 30 18446744073709551519
[2016-03-07 16:51:22] lumen.INFO: Range Beacon [2016-03-07 16:51:22] Maj.: 16 18446744073709551533
[2016-03-07 16:51:23] lumen.INFO: Range Beacon [2016-03-07 16:51:23] Maj.: 30 18446744073709551520
[2016-03-07 16:51:23] lumen.INFO: Range Beacon [2016-03-07 16:51:23] Maj.: 16 18446744073709551531
[2016-03-07 16:51:24] lumen.INFO: Range Beacon [2016-03-07 16:51:24] Maj.: 30 0
[2016-03-07 16:51:24] lumen.INFO: Range Beacon [2016-03-07 16:51:24] Maj.: 16 18446744073709551518
[2016-03-07 16:51:25] lumen.INFO: Range Beacon [2016-03-07 16:51:25] Maj.: 30 0
[2016-03-07 16:51:25] lumen.INFO: Range Beacon [2016-03-07 16:51:25] Maj.: 16 18446744073709551518
[2016-03-07 16:51:26] lumen.INFO: Range Beacon [2016-03-07 16:51:26] Maj.: 30 0
[2016-03-07 16:51:26] lumen.INFO: Range Beacon [2016-03-07 16:51:26] Maj.: 16 18446744073709551517
[2016-03-07 16:51:27] lumen.INFO: Range Beacon [2016-03-07 16:51:27] Maj.: 30 0
[2016-03-07 16:51:27] lumen.INFO: Range Beacon [2016-03-07 16:51:27] Maj.: 16 0
[2016-03-07 16:51:28] lumen.INFO: Range Beacon [2016-03-07 16:51:28] Maj.: 30 0
[2016-03-07 16:51:28] lumen.INFO: Range Beacon [2016-03-07 16:51:28] Maj.: 16 18446744073709551520
[2016-03-07 16:51:29] lumen.INFO: Range Beacon [2016-03-07 16:51:29] Maj.: 30 0
[2016-03-07 16:51:29] lumen.INFO: Range Beacon [2016-03-07 16:51:29] Maj.: 16 0
[2016-03-07 16:51:30] lumen.INFO: Range Beacon [2016-03-07 16:51:30] Maj.: 30 0
[2016-03-07 16:51:30] lumen.INFO: Range Beacon [2016-03-07 16:51:30] Maj.: 16 0
[2016-03-07 16:51:31] lumen.INFO: Range Beacon [2016-03-07 16:51:31] Maj.: 30 0
[2016-03-07 16:51:31] lumen.INFO: Range Beacon [2016-03-07 16:51:31] Maj.: 16 0
[2016-03-07 16:51:32] lumen.INFO: Range Beacon [2016-03-07 16:51:32] Maj.: 30 0
[2016-03-07 16:51:32] lumen.INFO: Range Beacon [2016-03-07 16:51:32] Maj.: 16 0
[2016-03-07 16:51:33] lumen.INFO: Range Beacon [2016-03-07 16:51:33] Maj.: 16 0
[2016-03-07 16:51:34] lumen.INFO: Range Beacon [2016-03-07 16:51:34] Maj.: 16 0
[2016-03-07 16:51:35] lumen.INFO: Range Beacon [2016-03-07 16:51:35] Maj.: 16 0
[2016-03-07 16:51:36] lumen.INFO: Range Beacon [2016-03-07 16:51:36] Maj.: 16 0
[2016-03-07 16:51:37] lumen.INFO: Range Beacon [2016-03-07 16:51:37] Maj.: 16 0
有谁知道为什么两个用例之间RSSI值的检测频率差异很大？在背景范围内更糟糕吗？
THX。