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Reply To: SDCCH drop

#66972
Dell
Guest

Hi,
we made drive test in the area of a cell which has high sddch duration. We noticed that between LU request and LU accept there is a duration of around 17 seconds. And for LU request normally there was no need because all cells around were in the same LAC. During entering the cell in Idle mode the signal loses (No Service) after a while it began with “Channel request, LU request etc.). Bellow you can see the layer three messages, if you have any idea why it might be happen like that. Could be any equipment nearby which can cause that (a government facility is situated only 100 meters from that cell). If yes, what equipment?

MsgTime Dir. Layer Message
11:59:13:477 D RR System Information Type 3
11:59:13:733 D RR System Information Type 4
11:59:13:970 D RR System Information Type 13
11:59:14:207 D RR System Information Type 2
11:59:14:473 D RR System Information Type 3
11:59:14:683 D RR System Information Type 4
11:59:14:930 D RR System Information Type 1
11:59:14:987 D RR Paging Request Type 1
11:59:15:037 D RR Paging Request Type 1
11:59:15:037 D RR Paging Request Type 3
11:59:15:067 D RR Paging Request Type 1
11:59:15:087 D RR Paging Request Type 1
11:59:15:100 U RR Channel Request
11:59:15:107 D RR Paging Request Type 1
11:59:15:127 D RR Paging Request Type 1
11:59:15:160 D RR System Information Type 2
11:59:15:207 D RR Immediate Assignment
11:59:15:423 U MM Location Updating Request
11:59:15:537 D RR System Information Type 5
11:59:15:573 U RR Measurement Report
11:59:15:660 U RR Classmark Change
11:59:15:863 D MM Authentication Request
11:59:16:017 D RR System Information Type 6
11:59:16:047 U RR Measurement Report
11:59:16:137 U MM Authentication Response
11:59:16:347 D RR Ciphering Mode Command
11:59:16:493 D RR System Information Type 5
11:59:16:507 U RR Measurement Report
11:59:16:610 U RR Ciphering Mode Complete
11:59:16:967 D RR System Information Type 6
11:59:17:003 U RR Measurement Report
11:59:17:440 D RR System Information Type 5
11:59:17:473 U RR Measurement Report
11:59:17:917 D RR System Information Type 6
11:59:17:950 U RR Measurement Report
11:59:18:393 D RR System Information Type 5
11:59:18:427 U RR Measurement Report
11:59:18:867 D RR System Information Type 6
11:59:18:903 U RR Measurement Report
11:59:19:347 D RR System Information Type 5
11:59:19:373 U RR Measurement Report
11:59:19:820 D RR System Information Type 6
11:59:19:857 U RR Measurement Report
11:59:20:297 D RR System Information Type 5
11:59:20:330 U RR Measurement Report
11:59:20:773 D RR System Information Type 6
11:59:20:807 U RR Measurement Report
11:59:21:247 D RR System Information Type 5
11:59:21:283 U RR Measurement Report
11:59:21:753 D RR System Information Type 6
11:59:21:783 U RR Measurement Report
11:59:22:210 D RR System Information Type 5
11:59:22:233 U RR Measurement Report
11:59:22:677 D RR System Information Type 6
11:59:22:710 U RR Measurement Report
11:59:23:150 D RR System Information Type 5
11:59:23:187 U RR Measurement Report
11:59:23:627 D RR System Information Type 5
11:59:23:660 U RR Measurement Report
11:59:24:107 D RR System Information Type 6
11:59:24:137 U RR Measurement Report
11:59:24:583 D RR System Information Type 5
11:59:24:613 U RR Measurement Report
11:59:25:057 D RR System Information Type 6
11:59:25:090 U RR Measurement Report
11:59:25:530 D RR System Information Type 5
11:59:25:567 U RR Measurement Report
11:59:26:007 D RR System Information Type 6
11:59:26:040 U RR Measurement Report
11:59:26:483 D RR System Information Type 5
11:59:26:517 U RR Measurement Report
11:59:26:957 D RR System Information Type 6
11:59:26:993 U RR Measurement Report
11:59:27:433 D RR System Information Type 5
11:59:27:467 U RR Measurement Report
11:59:27:910 D RR System Information Type 6
11:59:27:943 U RR Measurement Report
11:59:28:387 D RR System Information Type 5
11:59:28:420 U RR Measurement Report
11:59:28:860 D RR System Information Type 6
11:59:28:897 U RR Measurement Report
11:59:29:337 D RR System Information Type 5
11:59:29:373 U RR Measurement Report
11:59:29:813 D RR System Information Type 6
11:59:29:847 U RR Measurement Report
11:59:30:317 D RR System Information Type 5
11:59:30:327 U RR Measurement Report
11:59:30:767 D RR System Information Type 6
11:59:30:800 U RR Measurement Report
11:59:31:243 D RR System Information Type 5
11:59:31:277 U RR Measurement Report
11:59:31:717 D RR System Information Type 6
11:59:31:750 U RR Measurement Report
11:59:32:047 D MM Location Updating Accept
11:59:32:247 D RR System Information Type 5
11:59:32:250 U RR Measurement Report
11:59:32:317 U MM TMSI Reallocation Complete
11:59:32:533 D RR Channel Release
11:59:32:703 U RR Measurement Report
11:59:33:950 D RR Paging Request Type 1
11:59:34:143 D RR Paging Request Type 3
11:59:34:160 D RR Paging Request Type 1
11:59:34:193 D RR System Information Type 2
11:59:34:260 D RR Paging Request Type 1
11:59:34:287 D RR Paging Request Type 1
11:59:34:303 D RR Paging Request Type 1
11:59:34:323 D RR Paging Request Type 2
11:59:34:340 D RR Paging Request Type 1
11:59:34:353 D RR Paging Request Type 3
11:59:34:400 D RR Paging Request Type 1
11:59:34:420 U RR Channel Request
11:59:34:440 D RR System Information Type 3
11:59:34:497 D RR Paging Request Type 1
11:59:34:523 D RR Paging Request Type 3
11:59:34:550 D RR Paging Request Type 1
11:59:34:570 D RR Paging Request Type 3
11:59:34:590 D RR Paging Request Type 1
11:59:34:617 D RR Paging Request Type 1
11:59:34:637 D RR Paging Request Type 3
11:59:34:673 D RR System Information Type 4
11:59:34:690 D RR Immediate Assignment
11:59:34:933 U MM CM Service Request
11:59:35:047 D RR System Information Type 5
11:59:35:083 U RR Measurement Report
11:59:35:170 U RR Classmark Change
11:59:35:383 D RR Classmark Enquiry
11:59:35:523 D RR System Information Type 6
11:59:35:580 U RR Measurement Report
11:59:35:617 D RR Ciphering Mode Command
11:59:35:697 U RR Classmark Change
11:59:35:887 U RR Ciphering Mode Complete
11:59:36:013 D RR System Information Type 5
11:59:36:037 U RR Measurement Report
11:59:36:370 U CC Setup
11:59:36:477 D RR System Information Type 6
11:59:36:510 U RR Measurement Report
11:59:36:563 D CC Call Proceeding
11:59:36:803 D RR Assignment Command
11:59:36:997 U RR Assignment Complete
11:59:37:163 U RR Measurement Report
11:59:37:250 D CC Progress
11:59:37:480 D CC Alerting
11:59:37:540 D RR System Information Type 5
11:59:38:063 U RR Measurement Report
11:59:38:063 D CC Connect
11:59:38:063 U CC Connect Acknowledge
11:59:38:063 D RR System Information Type 6
11:59:38:170 U RR Measurement Report
11:59:38:520 D RR System Information Type 5
11:59:38:620 U RR Measurement Report
11:59:39:003 D RR System Information Type 6
11:59:39:103 U RR Measurement Report
11:59:39:490 D RR System Information Type 5
11:59:39:590 U RR Measurement Report
11:59:39:977 D RR System Information Type 6
11:59:40:073 U RR Measurement Report
11:59:40:460 D RR System Information Type 5
11:59:40:560 U RR Measurement Report
11:59:40:947 D RR System Information Type 6
11:59:41:043 U RR Measurement Report
11:59:41:430 D RR System Information Type 5
11:59:41:530 U RR Measurement Report
11:59:41:917 D RR System Information Type 6
11:59:42:017 U RR Measurement Report
11:59:42:407 D RR System Information Type 5
11:59:42:500 U RR Measurement Report
11:59:42:887 D RR System Information Type 6
11:59:42:987 U RR Measurement Report
11:59:43:370 D RR System Information Type 5
11:59:43:470 U RR Measurement Report
11:59:43:857 D RR System Information Type 6
11:59:43:957 U RR Measurement Report
11:59:44:067 D RR System Information Type 5
11:59:44:107 U RR Measurement Report
11:59:44:847 D RR System Information Type 6
11:59:44:877 U RR Measurement Report
11:59:45:307 D RR System Information Type 5
11:59:45:403 U RR Measurement Report
11:59:45:793 D RR System Information Type 6
11:59:45:890 U RR Measurement Report
11:59:46:277 D RR System Information Type 5
11:59:46:380 U RR Measurement Report
11:59:46:760 D RR System Information Type 6
11:59:46:860 U RR Measurement Report
11:59:47:233 D RR System Information Type 5
11:59:47:347 U RR Measurement Report
11:59:47:610 D RR Handover Command
11:59:47:887 U RR Handover Complete
11:59:48:013 U RR Measurement Report
11:59:48:400 D RR System Information Type 5
11:59:48:500 U RR Measurement Report
11:59:48:897 D RR System Information Type 6
11:59:48:983 U RR Measurement Report
11:59:49:370 D RR System Information Type 5
11:59:49:473 U RR Measurement Report
11:59:49:857 D RR System Information Type 6
11:59:49:957 U RR Measurement Report
11:59:50:340 D RR System Information Type 5
11:59:50:440 U RR Measurement Report
11:59:50:827 D RR System Information Type 6
11:59:50:923 U RR Measurement Report
11:59:51:310 D RR System Information Type 5
11:59:51:410 U RR Measurement Report
11:59:51:797 D RR System Information Type 6
11:59:51:897 U RR Measurement Report
11:59:52:297 D RR System Information Type 5
11:59:52:380 U RR Measurement Report
11:59:52:767 D RR System Information Type 6
11:59:52:867 U RR Measurement Report
11:59:53:250 D RR System Information Type 5
11:59:53:350 U RR Measurement Report
11:59:53:737 D RR System Information Type 6
11:59:53:837 U RR Measurement Report
11:59:54:220 D RR System Information Type 5
11:59:54:320 U RR Measurement Report
11:59:54:707 D RR System Information Type 6
11:59:54:807 U RR Measurement Report
11:59:55:193 D RR System Information Type 5
11:59:55:333 U RR Measurement Report
11:59:55:677 D RR System Information Type 6
11:59:55:777 U RR Measurement Report
11:59:56:160 D RR System Information Type 5
11:59:56:260 U RR Measurement Report
11:59:56:657 D RR System Information Type 6
11:59:56:747 U RR Measurement Report
11:59:57:160 D RR System Information Type 5
11:59:57:207 U RR Measurement Report
11:59:57:547 D RR System Information Type 6
11:59:57:703 U RR Measurement Report
11:59:58:103 D RR System Information Type 5
11:59:58:203 U RR Measurement Report
11:59:58:590 D RR System Information Type 6
11:59:58:687 U RR Measurement Report
11:59:59:073 D RR System Information Type 5
11:59:59:173 U RR Measurement Report
11:59:59:557 D RR System Information Type 6
11:59:59:657 U RR Measurement Report
12:00:00:043 D RR System Information Type 5
12:00:00:143 U RR Measurement Report
12:00:00:530 D RR System Information Type 6
12:00:00:627 U RR Measurement Report
12:00:01:013 D RR System Information Type 5
12:00:01:113 U RR Measurement Report
12:00:01:500 D RR System Information Type 6
12:00:01:600 U RR Measurement Report
12:00:01:983 D RR System Information Type 5
12:00:02:083 U RR Measurement Report
12:00:02:477 D RR System Information Type 6
12:00:02:570 U RR Measurement Report
12:00:02:957 D RR System Information Type 5
12:00:03:057 U RR Measurement Report
12:00:03:440 D RR System Information Type 6
12:00:03:540 U RR Measurement Report
12:00:03:927 D RR System Information Type 5
12:00:04:023 U RR Measurement Report
12:00:04:413 D RR System Information Type 6
12:00:04:510 U RR Measurement Report
12:00:04:897 D RR System Information Type 5
12:00:04:997 U RR Measurement Report
12:00:05:380 D RR System Information Type 6
12:00:05:480 U RR Measurement Report
12:00:05:867 D RR System Information Type 5
12:00:05:970 U RR Measurement Report
12:00:06:350 D RR System Information Type 6
12:00:06:450 U RR Measurement Report
12:00:06:837 D RR System Information Type 5
12:00:06:937 U RR Measurement Report
12:00:07:323 D RR System Information Type 6
12:00:07:420 U RR Measurement Report
12:00:07:807 D RR System Information Type 5
12:00:07:907 U RR Measurement Report
12:00:08:290 D RR System Information Type 6
12:00:08:330 U RR Measurement Report
12:00:08:780 D RR System Information Type 5
12:00:08:877 U RR Measurement Report
12:00:09:263 D RR System Information Type 6
12:00:09:360 U RR Measurement Report
12:00:09:750 D RR System Information Type 5
12:00:09:847 U RR Measurement Report
12:00:10:233 D RR System Information Type 6
12:00:10:340 U RR Measurement Report
12:00:10:717 D RR System Information Type 5
12:00:10:817 U RR Measurement Report
12:00:11:203 D RR System Information Type 6
12:00:11:303 U RR Measurement Report
12:00:11:687 D RR System Information Type 5
12:00:11:787 U RR Measurement Report
12:00:12:177 D RR System Information Type 6
12:00:12:270 U RR Measurement Report
12:00:12:657 D RR System Information Type 5
12:00:12:757 U RR Measurement Report
12:00:13:153 D RR System Information Type 6
12:00:13:177 U RR Measurement Report
12:00:13:627 D RR System Information Type 5
12:00:13:727 U RR Measurement Report
12:00:14:113 D RR System Information Type 6
12:00:14:213 U RR Measurement Report
12:00:14:603 D RR System Information Type 5
12:00:14:697 U RR Measurement Report
12:00:15:083 D RR System Information Type 6
12:00:15:183 U RR Measurement Report
12:00:15:580 D RR System Information Type 5
12:00:15:667 U RR Measurement Report
12:00:16:057 D RR System Information Type 6
12:00:16:153 U RR Measurement Report
12:00:16:540 D RR System Information Type 5
12:00:16:643 U RR Measurement Report
12:00:17:023 D RR System Information Type 6
12:00:17:123 U RR Measurement Report
12:00:17:510 D RR System Information Type 5
12:00:17:607 U RR Measurement Report
12:00:17:993 D RR System Information Type 6
12:00:18:103 U RR Measurement Report
12:00:18:480 D RR System Information Type 5
12:00:18:580 U RR Measurement Report
12:00:18:970 D RR System Information Type 6
12:00:19:067 U RR Measurement Report
12:00:19:450 D RR System Information Type 5
12:00:19:550 U RR Measurement Report
12:00:19:937 D RR System Information Type 6
12:00:20:037 U RR Measurement Report
12:00:20:423 D RR System Information Type 5
12:00:20:520 U RR Measurement Report
12:00:20:910 D RR System Information Type 6
12:00:21:007 U RR Measurement Report
12:00:21:390 D RR System Information Type 5
12:00:21:490 U RR Measurement Report
12:00:21:877 D RR System Information Type 6
12:00:21:977 U RR Measurement Report
12:00:22:360 D RR System Information Type 5
12:00:22:463 U RR Measurement Report
12:00:22:847 D RR System Information Type 6
12:00:22:960 U RR Measurement Report
12:00:23:330 D RR System Information Type 5
12:00:23:430 U RR Measurement Report
12:00:23:817 D RR System Information Type 6
12:00:23:850 U RR Measurement Report
12:00:24:303 D RR System Information Type 5
12:00:24:403 U RR Measurement Report
12:00:24:787 D RR System Information Type 6
12:00:24:887 U RR Measurement Report
12:00:25:247 D RR Handover Command
12:00:25:273 D RR System Information Type 5
12:00:25:457 D RR Physical Information
12:00:25:517 D RR Physical Information
12:00:25:577 U RR Handover Complete
12:00:25:597 D RR Physical Information
12:00:25:723 U RR Measurement Report
12:00:26:103 D RR System Information Type 5
12:00:26:207 U RR Measurement Report
12:00:26:600 D RR System Information Type 6
12:00:26:690 U RR Measurement Report
12:00:27:077 D RR System Information Type 5
12:00:27:177 U RR Measurement Report
12:00:27:560 D RR System Information Type 6
12:00:27:660 U RR Measurement Report
12:00:28:047 D RR System Information Type 5
12:00:28:147 U RR Measurement Report
12:00:28:523 D RR System Information Type 6
12:00:28:630 U RR Measurement Report
12:00:29:017 D RR System Information Type 5
12:00:29:117 U RR Measurement Report
12:00:29:500 D RR System Information Type 6
12:00:29:600 U RR Measurement Report
12:00:29:987 D RR System Information Type 5
12:00:30:087 U RR Measurement Report
12:00:30:473 D RR System Information Type 6
12:00:30:570 U RR Measurement Report
12:00:30:970 D RR System Information Type 5
12:00:31:057 U RR Measurement Report
12:00:31:443 D RR System Information Type 6
12:00:31:547 U RR Measurement Report
12:00:31:927 D RR System Information Type 5
12:00:32:027 U RR Measurement Report
12:00:32:387 D RR System Information Type 6
12:00:32:513 U RR Measurement Report
12:00:32:750 D RR System Information Type 5
12:00:32:997 U RR Measurement Report
12:00:33:180 D RR System Information Type 6
12:00:33:393 U RR Measurement Report
12:00:33:863 D RR System Information Type 5
12:00:33:963 U RR Measurement Report
12:00:34:350 D RR System Information Type 6
12:00:34:450 U RR Measurement Report
12:00:34:837 D RR System Information Type 5
12:00:34:933 U RR Measurement Report
12:00:35:320 D RR System Information Type 6
12:00:35:420 U RR Measurement Report
12:00:35:807 D RR System Information Type 5
12:00:35:907 U RR Measurement Report
12:00:36:290 D RR System Information Type 6
12:00:36:390 U RR Measurement Report
12:00:36:777 D RR System Information Type 5
12:00:36:873 U RR Measurement Report
12:00:37:260 D RR System Information Type 6
12:00:37:360 U RR Measurement Report
12:00:37:747 D RR System Information Type 5
12:00:37:847 U RR Measurement Report
12:00:38:107 D RR Handover Command
12:00:38:267 D RR Physical Information
12:00:38:290 U RR Measurement Report
12:00:38:347 D RR Physical Information
12:00:38:423 U RR Handover Complete
12:00:38:687 U CC Disconnect
12:00:38:687 D RR System Information Type 5
12:00:38:793 U RR Measurement Report
12:00:38:847 D CC Release
12:00:38:873 U CC Release Complete
12:00:39:087 D RR Channel Release
12:00:39:227 D RR System Information Type 5
12:00:39:277 U RR Measurement Report
12:00:39:437 D RR Paging Request Type 1
12:00:39:467 D RR Paging Request Type 1
12:00:39:487 D RR Paging Request Type 1
12:00:39:517 D RR Paging Request Type 1
12:00:39:533 D RR Paging Request Type 2
12:00:39:560 D RR Paging Request Type 1
12:00:39:580 D RR Paging Request Type 1
12:00:39:627 D RR System Information Type 13
12:00:39:677 D RR Paging Request Type 1
12:00:39:707 D RR Paging Request Type 3
12:00:39:723 D RR Paging Request Type 2
12:00:39:753 D RR Paging Request Type 1
12:00:39:777 D RR Paging Request Type 1
12:00:39:797 D RR Paging Request Type 1
12:00:39:817 D RR Paging Request Type 1
12:00:39:853 D RR System Information Type 2
12:00:39:917 D RR Paging Request Type 1
12:00:39:943 D RR Paging Request Type 1
12:00:39:963 D RR Paging Request Type 1
12:00:39:990 D RR Paging Request Type 1
12:00:40:007 D RR Paging Request Type 2
12:00:40:037 D RR Paging Request Type 1
12:00:40:057 D RR Paging Request Type 2
12:00:40:087 D RR System Information Type 3
12:00:40:153 D RR Paging Request Type 1
12:00:40:180 D RR Paging Request Type 1
12:00:40:200 D RR Paging Request Type 1
12:00:40:227 D RR Paging Request Type 1
12:00:40:247 D RR Paging Request Type 3
12:00:40:273 D RR Paging Request Type 1
12:00:40:293 D RR Paging Request Type 1
12:00:40:323 D RR System Information Type 4
12:00:40:390 D RR Paging Request Type 1
12:00:40:420 D RR Paging Request Type 2
12:00:40:437 D RR Paging Request Type 1
12:00:40:467 D RR Paging Request Type 1
12:00:40:483 D RR Paging Request Type 1
12:00:40:513 D RR Paging Request Type 1
12:00:40:533 D RR Paging Request Type 1
12:00:40:567 D RR System Information Type 1
12:00:41:710 D RR Paging Request Type 1
12:00:42:347 D RR System Information Type 3
12:00:42:943 D RR System Information Type 3
12:00:43:027 D RR System Information Type 3
12:00:43:900 D RR System Information Type 3
12:00:43:970 D RR System Information Type 4
12:00:44:623 D RR System Information Type 4
12:00:45:217 D RR System Information Type 3
12:00:46:927 D RR System Information Type 3
12:00:51:223 D RR Paging Request Type 1
12:00:53:603 D RR Paging Request Type 1

Regards,
Dell