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(普通问题)
提问者:
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• 区分语音业务、数据业务的4到3、4到2重定向采用不同设置方案 2016-05-17
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• 下载业务上发测量报告后重定向 2015-10-28
• 业务态LTE到2G或者3G是“重定向”还是“盲重定向”？ 2015-09-17
• CSFB语音业务主叫未能发起重定向 2015-05-18
• 当你接入LTE的时候，如果需要用短信业务，是如何重定向会2G的？ 2015-03-15
• LTE到GSM和TDS的重定向关闭了，那么LTE侧无法通过重定向，也无法通过CCO重定位到GSM那怎么做CSFB业务呢 2014-08-15
• 区分语音业务、数据业务的4到3、4到2重定向采用不同设置方案 2016-05-17
• 区分语音业务、数据业务的4到3、4到2重定向设置方案 2016-05-17
• 下载业务上发测量报告后重定向 2015-10-28
• 业务态LTE到2G或者3G是“重定向”还是“盲重定向”？ 2015-09-17
• CSFB语音业务主叫未能发起重定向 2015-05-18
• 当你接入LTE的时候，如果需要用短信业务，是如何重定向会2G的？ 2015-03-15
• LTE到GSM和TDS的重定向关闭了，那么LTE侧无法通过重定向，也无法通过CCO重定位到GSM那怎么做CSFB业务呢 2014-08-15
问题答案
( 1 )
Service Redirection Message (SRM)
2001 Mar 23 12:56:25.391 FORWARD TRAFFIC CHANNEL -- Service Redirection Msg
protocol_rev = 6 (IS2000) (vol5 3.7.2.3.2.16 )chan_type = 3 (Forward Traffic)
chan
ftc_msg
gen
msg_type = 23 (Service Redirection)
tc_srv_redir
hdr
ack_seq = 1
msg_seq = 4
ack_req = 1
encryption = 0
return_if_fail = 0 ß ① Allow tuning again, when mobile fail to do redirection.
delete_tmsi = 0 ß ② ‘0’ means “no use TMSI”.
redirect_type = 1 ß ③ NDSS redirection
record_type = 2 ß ④ Redirection in cdma system
redir
rec2
band_class = 0
expected_sid = 2236 (0x8bc) ß SID for redirection (make a decision to see MIN)
expected_nid = 65535 (0xffff) ß wildcard, Compare SID regardless NID
num_chans = 1
cdma_chan[0] = 29 (0x1d) ß CH for redirection
Consideration
① Return If faIl indicator
System makes mobile use Redirection Criteria designated. But, when redirection order is failed, value ‘1’ mean that system let mobile return original system.
②TMSI delete indicator
When mobile needs to delete TMSI assigned already, BTS set the field ‘1’. Otherwise, set ‘1’.
③
Table 3.7.2.3.2.16-1. Redirection Types
|
Description |
REDIRECT_TYPE(binary) |
|
Normal redirection |
0 |
|
NDSS redirection |
1 |
④
Table 3.7.2.3.2.16-2. Redirection Record Types
|
Description |
RECORD_TYPE (binary) |
|
NDSS off indication |
0 |
|
Redirection to an analog system as defined in [12], [21], [22], [25], [24], and[6] |
1 |
|
Redirection to a CDMA system as defined in [24] and [2] |
10 |
|
Redirection to a TACS analog system as defined in Department of Trade and Industry’s TACS Mobile Station-Land Station Compatibility Specification, Issue 4, Amendment 1. |
11 |
|
Redirection to aJTACS analog system as defined in ARIB’s RCR STD-36. |
100 |
|
All other RECORD_TYPE values are reserved | |
回答者：
xhy1331
回答时间：2012-06-11 16:17
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