流程总结

1.Create Session Request

• GTP Header
• IMSI:MCC(460)+MNC(00中移动）+MSIN(10位)
• MSISDN:CC(86)+NDC(133)+SN    
• MEI

• ULI:Flags(ECGI/TAI/RAI/SAI/CGI) + TAI(MCC+MNC+Tracking Area Code) + ECGI(MCC+MNC+ECI)
• Serving NetWork：（MCC + MNC)
• RAT Type：（E-UTRAN/UTRAN/GERAN）

• Indication

• FTEID:Flages(IPv4/IPv6/Interfce Type) + TEID Key + IPv4 address
• APN
• Selection mode(0x02 Network provided APN）
• PDN Type（0x01 IPv4)
• PDN Address Allocation：Flags(后三位 0x01 IPv4) + IPv4 address
• APN Restrication

• APN-AMBR:APN-AMBR for uplink + APN-AMBR for downlink
• PCO:Flags(Extension Flag[首位]+Configuration protocol[后三位]）+ Container Identifier + DNS Server
• Bearer Contexts:EPS Bearer ID + Bearer

• Quality of ServiceRecovery：Restart Counter
• MS Time Zone（GMT + 08:00）

2.Create Session Response

• GTP Header
• Cause：cause：Reques accepted[0x10] + Flags（PDN Connection Error/Bearer Context Error/Cause Souce)
• FTEID:Flages(IPv4/IPv6/Interfce Type) + TEID Key + IPv4 address
• PDN Address Allocation：Flags(后三位 0x01 IPv4) + IPv4 address
• APN Restrication
• Bearer Contexts:EPS Bearer ID + Cause+ FTEID + Charging ID+Bearer Flags
• Recovery：Restart Counter

3.Delete Session Request

• GTP Header
• EPS Bearer ID

4.Delete Session Request

• GTP header
• Cause
• Recovery

5.Modify Bearer Request

• GTP header
• Bearer contexts
  • EPS Bearer ID
  • F-TEID
• Recovery

6.Modify Bearer Response

• GTP header
• Cause
• Bearer contexts
  • EPS Bearer ID
  • Cause
  • F-TEID
• Recovery