LTE roaming ability analysis in the GUL interoperation scenario

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LTE roaming ability analysis in the GUL interoperation scenario
Prepared by: Yu chunhui
Date: 2011-9-10
Huawei Technologies Co., Ltd

Contents
1 Scope 5
2 Scenarios summery 5
2.1 Overview 5
2.2 Live Network: All the users load balance by Alcatel OCS 5
Phase1a：PS8.2 6
Phase1b：SGSN V8R9C03 upgraded, support ue capability distinguish； 6
Phase2a：MME upgrade to PS9.1, via NAPTR request function(DNS Server);HSS upgrade to C031 support dual DRA connection; 6
Phase2b：Unified EPC network, only UGW and USN 6
3 Scenarios Analysis 6
3.1 2/3/4G subscribed user roaming out to 2/3G network 6
3.2 2/3/4G subscribed user roaming into 2/3G network 7
3.3 2/3/4G subscribed user roaming out to 4G network 9
3.4 4G subscribed user roaming into 4G network 10
3.5 4G subscribed user roaming into 2/3G network 10
3.6 2/3/4G subscribed user roaming into 4G network 11
4 Special Scenarios 12
4.1 UMTS service subscriber roaming out to LTE network 12
4.2 UMTS service subscriber roaming out to LTE network 12
4.3 UMTS service subscriber roaming into LTE network 12

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