VoLTE中SRVCC切換時的音訊來電轉駁問題故障排除

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已更新: 2019 年 10 月 14 日

文件 ID:214936

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簡介

本文檔介紹如何解決在SRVCC切換時VoLTE中的音訊呼叫無法無縫轉移時發生的問題。

必要條件

需求

思科建議您瞭解以下主題：

5000/5500的硬體知識
StarOS

採用元件

本文件所述內容不限於特定軟體和硬體版本。

本文中的資訊是根據特定實驗室環境內的裝置所建立。
文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

縮寫

VoLTE	長期演化的聲音
SRVCC	單無線電語音呼叫連續性
CCR	信用控制請求
CCA	信用控制答案
AVP	屬性值對
PCRF	策略和計費規則功能
PCEF	策略和計費實施功能
SGW	服務閘道
PGW	封包資料網路閘道器
MME	行動化管理實體

問題

服務提供商報告，即使SRVCC切換在MME成功，VoLTE呼叫仍不能無縫地轉移到舊式2G/3G網路。在SRVCC切換完成後，MME向SGW傳送DELETE_BEARER_COMMAND消息（語音承載標誌為true），並在PGW成功釋放承載者。
但是，在從PGW到PCRF的進一步通訊中，觀察到儘管SRVCC在MME端成功，PGW並不通知PCRF為PS_to_CS_Transfer。

疑難排解

本節提供的資訊用於解決通過SRVCC切換從VoLTE傳輸到傳統2G/3G網路時的音訊呼叫處理問題。

通過SRVCC切換收集的「mon sub」跟蹤。以下是MME、SGW、PGW和PCRF之間交換的報文序列。

DELETE_BEARER_COMMAND消息從MME到SGW，作為語音承載標誌true:

INBOUND>>>>>  12:17:24:406 Eventid:141004(3)
[SGW-S11/S4]GTPv2C Rx PDU, from 10.206.33.X:30464 to 10.206.31.Y:2123 (57)
TEID: 0x81E0418E, Message type: EGTP_DELETE_BEARER_COMMAND (0x42)
Sequence Number: 0xD2101D (13766685)
GTP HEADER
        Version number: 2
        TEID flag: Present
        Piggybacking flag: Not present
        Message Priority flag: Not present
        Message Priority: NA
        Message Length: 0x0035 (53)

INFORMATION ELEMENTS
        BEARER CONTEXT:
            Type: 93  Length: 10  Inst: 0
            Value:
                EPS BEARER ID:
                    Type: 73  Length: 1  Inst: 0
                    Value: 7
                BEARER FLAGS:
                    Type: 97  Length: 1  Inst: 0
                    Value:
                        VB : 1                                   >> voice bearer as true
        ULI TIMESTAMP:
            Type: 170  Length: 4  Inst: 0
            Value:
                Seconds: 3766718840

        USER LOCATION INFO:
            Type: 86  Length: 13  Inst: 0
            Value:
                Location type: TAI
                MCC: XYZ
                MNC: AB
                TAC: 0x7D5
                Location type: ECGI
                MCC: XYZ
                MNC: AB
                ECI: 0xE02F902

        UE TIME ZONE:
            Type: 114  Length: 2  Inst: 0
            Value:
                TZ: +5:30
                DST: +0 hour

此外，SGW將EGTP_DELETE_BEARER_COMMAND消息傳送到PGW:

INBOUND>>>>>  12:17:24:407 Eventid:141004(3)
[PGW-S5/S2a/S2b]GTPv2C Rx PDU, from 223.224.X.Y:36368 to 223.224.A.B:2123 (57)
TEID: 0x80F0E1DB, Message type: EGTP_DELETE_BEARER_COMMAND (0x42)
Sequence Number: 0xAD818E (11370894)
GTP HEADER
        Version number: 2
        TEID flag: Present
        Piggybacking flag: Not present
        Message Priority flag: Not present
        Message Priority: NA
        Message Length: 0x0035 (53)

INFORMATION ELEMENTS
        BEARER CONTEXT:
            Type: 93  Length: 10  Inst: 0
            Value:
                EPS BEARER ID:
                    Type: 73  Length: 1  Inst: 0
                    Value: 7
                BEARER FLAGS:
                    Type: 97  Length: 1  Inst: 0
                    Value:
                        VB : 1                                   >> voice bearer as true
        ULI TIMESTAMP:
            Type: 170  Length: 4  Inst: 0
            Value:
                Seconds: 3766718840
        USER LOCATION INFO:
            Type: 86  Length: 13  Inst: 0
            Value:
                Location type: TAI
                MCC: XYZ
                MNC: AB
                TAC: 0x7D5
                Location type: ECGI
                MCC: XYZ
                MNC: AB
                ECI: 0xE02F902
        UE TIME ZONE:
            Type: 114  Length: 2  Inst: 0
            Value:
                TZ: +5:30
                DST: +0 hour

此外，PGW接受DELETE_BEARER並啟動承載刪除：

<<<
     
      
      
 
      [PGW-S5/S2a/S2b]GTPv2C Tx PDU, from 223.224.A.B:2123 to 223.224.X.Y:36368 (17) 
      
 
      TEID: 0x80F3C18E, Message type: EGTP_DELETE_BEARER_REQUEST (0x63) 
      
 
      Sequence Number: 0xAD818E (11370894) 
      
 
      GTP HEADER 
      
 
              Version number: 2 
      
 
              TEID flag: Present 
      
 
              Piggybacking flag: Not present 
      
 
              Message Priority flag: Not present 
      
 
              Message Priority: NA 
      
 
              Message Length: 0x000D (13) 
      
 
      
 
      INFORMATION ELEMENTS 
      
 
              EPS BEARER ID: 
      
 
                  Type: 73  Length: 1  Inst: 1 
      
 
                  Value: 7

此外，PGW向PCRF發起CCR更新消息。這裡，在Charging-Rule-Report AVP中，PGW通知PCRF有關計費規則名稱、PCC-Rule-Status和Rule-Failure-Code。

發現PGW向PCRF傳送錯誤的Rule-Failure-Code。由於MME指示釋放語音承載（由於標誌為真），PGW應通知給PCRF作為PS_to_CS切換。而是向PCRF報告一個Resource_Allocation_failure。

因此，PCRF考慮在4G網路中發生故障，並將其通知給IMS。因此，IMS正在啟動VoLTE呼叫終止。因此，儘管SRVCC成功，但呼叫沒有無縫轉移到舊式2G/3G網路。

In 3GPP TS 29.212 V13.5.0 (2016-03)
As mentioned in section 3.6, Request of IP-CAN Bearer Termination
If the IP-CAN bearer termination is caused by the PS to CS handover, the PCEF shall report related PCC rules for this IP-CAN bearer by including the Rule-Failure-Code AVP
set to the value PS_TO_CS_HANDOVER.

In 3GPP TS 29.212 V14.3.0 (2017-03)
As mentioned in section 4.5.6 Indication of IP-CAN Bearer Termination Implications
When the PCEF detects that a dedicated IP-CAN bearer could not be activated or has been terminated it shall remove the affected PCC rules and send a CCR command to the PCRF
with CC-Request-Type AVP set to the value "UPDATE_REQUEST", including the Charging-Rule-Report AVP specifying the affected PCC rules with the PCC-Rule-Status set to inactive
and including the Rule-Failure-Code AVP assigned to the value RESOURCE_ALLOCATION_FAILURE.

SRVCC PS-to-CS Handover Indication Support in starOS
This feature helps in notifying the PCRF about the exact reason for PCC rule deactivation on Voice bearer deletion.
This exact cause will help PCRF to then take further action appropriately.
This feature ensures complete compliance for SRVCC, including support for PS-to-CS handover indication when voicebearers are released.
If the IP-CAN bearer termination is caused by the PS to CS handover, the PCEF may report related PCC rules for thisIP-CAN bearer by including the Rule-Failure-Code AVP set to the value PS_TO_CS_HANDOVER.

從PGW到PCRF的CCR更新消息（關於計費規則報告AVP）：

<<<
      
       
       
 
       Diameter message from 10.0.232.X:32933 to 10.5.40.Y:3869 
       
 
         Base Header Information: 
       
 
          Version:            0x01        (1) 
       
 
          Message Length:     0x000260    (608) 
       
 
          Command Flags:      0xc0        (192) REQ PXY  
       
 
          Command Code:       0x000110    (272) Credit-Control-Request 
       
 
          Application ID:     0x01000016  (16777238)   3GPP-Gx 
       
 
          Hop2Hop-ID:         0xb7cf10ce  (3083800782) 
       
 
          End2End-ID:         0x3b6b4886  (996886662) 
       
 
         AVP Information: 
       
 
            [M]  Session-Id 
       
 
               Code:      0x00000107 (263) Session-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00004f   (79) 
       
 
               Data: 0003-diamproxy.asr55k.gx;1385806608;584234203;5cd9037d-1db02 
       
 
       
 
            [M]  Auth-Application-Id 
       
 
               Code:      0x00000102 (258) Auth-Application-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00000c   (12) 
       
 
               Data: 16777238 
       
 
       
 
            [M]  Origin-Host 
       
 
               Code:      0x00000108 (264) Origin-Host 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00002b   (43) 
       
 
               Data: 0003-diamproxy.asr55k.gx 
       
 
       
 
            [M]  Origin-Realm 
       
 
               Code:      0x00000128 (296) Origin-Realm 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00001a   (26) 
       
 
               Data: cisco.com 
       
 
       
 
           [M]  Destination-Realm 
       
 
               Code:      0x0000011b (283) Destination-Realm 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00002a   (42) 
       
 
               Data: PCRF.MNC0AB.MCCXYZ.3GPPNETWORK.ORG 
       
 
       
 
            [M]  CC-Request-Type 
       
 
               Code:      0x000001a0 (416) CC-Request-Type 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00000c   (12) 
       
 
               Data: UPDATE_REQUEST (2) 
       
 
       
 
            [M]  CC-Request-Number 
       
 
               Code:      0x0000019f (415) CC-Request-Number 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00000c   (12) 
       
 
               Data: 2 
       
 
       
 
            [M]  Destination-Host 
       
 
               Code:      0x00000125 (293) Destination-Host 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x000037   (55) 
       
 
               Data: PCRF01.PCRF.MNC0AB.MCCXYZ.3GPPNETWORK.ORG 
       
 
       
 
            [M]  Origin-State-Id 
       
 
               Code:      0x00000116 (278) Origin-State-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00000c   (12) 
       
 
               Data: 1552081338 
       
 
       
 
            [M]  Subscription-Id 
       
 
               Code:      0x000001bb (443) Subscription-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x000028   (40) 
       
 
                [M]  Subscription-Id-Type 
       
 
                   Code:      0x000001c2 (450) Subscription-Id-Type 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x00000c   (12) 
       
 
                   Data: END_USER_E164 (0) 
       
 
       
 
                [M]  Subscription-Id-Data 
       
 
                   Code:      0x000001bc (444) Subscription-Id-Data 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x000014   (20) 
       
 
                   Data: 121234567891 
       
 
       
 
            [M]  Subscription-Id 
       
 
               Code:      0x000001bb (443) Subscription-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00002c   (44) 
       
 
                [M]  Subscription-Id-Type 
       
 
                   Code:      0x000001c2 (450) Subscription-Id-Type 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x00000c   (12) 
       
 
                   Data: END_USER_IMSI (1) 
       
 
       
 
                [M]  Subscription-Id-Data 
       
 
                   Code:      0x000001bc (444) Subscription-Id-Data 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x000017   (23) 
       
 
                   Data: XYZAB1234567891 
       
 
       
 
            [M]  Framed-IPv6-Prefix 
       
 
               Code:      0x00000061 (97) Framed-IPv6-Prefix 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x000012   (18) 
       
 
               Data: Reserved: 00 Prefixlen: 64 IPv6 prefix: 2401:4900:4097:f050:: 
       
 
       
 
            [M]  User-Equipment-Info 
       
 
               Code:      0x000001ca (458) User-Equipment-Info 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00002c   (44) 
       
 
                [M]  User-Equipment-Info-Type 
       
 
                   Code:      0x000001cb (459) User-Equipment-Info-Type 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x00000c   (12) 
       
 
                   Data: IMEISV (0) 
       
 
       
 
                [M]  User-Equipment-Info-Value 
       
 
                   Code:      0x000001cc (460) User-Equipment-Info-Value 
       
 
                   Flags:     0x40       (64)  [M] 
       
 
                   Length:    0x000018   (24) 
       
 
                   Data: 9876543211234 
       
 
       
 
            [M]  Called-Station-Id 
       
 
               Code:      0x0000001e (30) Called-Station-Id 
       
 
               Flags:     0x40       (64)  [M] 
       
 
               Length:    0x00000b   (11) 
       
 
               Data: ims 
       
 
       
 
            [V] [M]  Charging-Rule-Report 
       
 
               Code:      0x000003fa (1018) Charging-Rule-Report 
       
 
               Flags:     0xc0       (192) [V]  [M] 
       
 
               Length:    0x00006c   (108) 
       
 
               Vendor-Id: 0x000028af (10415) 3GPP 
       
 
                [V] [M]  Charging-Rule-Name 
       
 
                   Code:      0x000003ed (1005) Charging-Rule-Name 
       
 
                   Flags:     0xc0       (192) [V]  [M] 
       
 
                   Length:    0x00001e   (30) 
       
 
                   Vendor-Id: 0x000028af (10415) 3GPP 
       
 
                   Data: I_AD_VOLTE00F72513 
       
 
       
 
                [V] [M]  Charging-Rule-Name 
       
 
                   Code:      0x000003ed (1005) Charging-Rule-Name 
       
 
                   Flags:     0xc0       (192) [V]  [M] 
       
 
                   Length:    0x00001e   (30) 
       
 
                   Vendor-Id: 0x000028af (10415) 3GPP 
       
 
                   Data: I_AD_VOLTE00F72512 
       
 
       
 
                [V] [M]  PCC-Rule-Status 
       
 
                   Code:      0x000003fb (1019) PCC-Rule-Status 
       
 
                   Flags:     0xc0       (192) [V]  [M] 
       
 
                   Length:    0x000010   (16) 
       
 
                   Vendor-Id: 0x000028af (10415) 3GPP 
       
 
                   Data: INACTIVE (1) 
       
 
       
 
                [V] [M]  Rule-Failure-Code 
       
 
                   Code:      0x00000407 (1031) Rule-Failure-Code 
       
 
                   Flags:     0xc0       (192) [V]  [M] 
       
 
                   Length:    0x000010   (16) 
       
 
                   Vendor-Id: 0x000028af (10415) 3GPP 
       
 
                   Data: RESOURCE_ALLOCATION_FAILURE (10)                          >> failure code is incorrect. It should be PS_CS_Handover 
       
 
       
 
            [V] [M]  Access-Network-Charging-Address 
       
 
               Code:      0x000001f5 (501) Access-Network-Charging-Address 
       
 
               Flags:     0xc0       (192) [V]  [M] 
       
 
               Length:    0x000012   (18) 
       
 
               Vendor-Id: 0x000028af (10415) 3GPP 
       
 
               Data: IPv4 223.224.X.Y

解決方案

在客戶網路中使用了rel-8 diameter字典。發現Rel-8不支援PS_CS_交接。
因此，您需要將字典更新為3gpp-r10。將字典更新為3gpp-r10後，該原因將正確傳送為PS_CS_Handover。
此後，終端使用者的音訊呼叫可能能夠從VoLTE無縫切換到傳統2G/3G網路。

ims-auth-service DRA_Gx_SPG
   policy-control
     diameter dictionary r8-gx-standard
     diameter update-dictionary-avps 3gpp-r10    << diameter dictionary updated to 3gpp-r10

DELETE_BEARER_COMMAND消息從SGW到PGW作為語音承載標誌true:

INBOUND>>>>>  From sessmgr:205 tpc_interface.c:1338 (Callid 3cda3ef4) 13:28:21:659 Eventid:141004(3)
[PGW-S5/S2a/S2b]GTPv2C Rx PDU, from 223.224.M.N:39632 to 223.224.P.Q:2123 (57)
TEID: 0x845800CD, Message type: EGTP_DELETE_BEARER_COMMAND (0x42)
Sequence Number: 0xE9625A (15295066)
GTP HEADER
        Version number: 2
        TEID flag: Present
        Piggybacking flag: Not present
        Message Priority flag: Not present
        Message Priority: NA
        Message Length: 0x0035 (53)

INFORMATION ELEMENTS
        BEARER CONTEXT:
            Type: 93  Length: 10  Inst: 0
            Value:
                EPS BEARER ID:
                    Type: 73  Length: 1  Inst: 0
                    Value: 7

                BEARER FLAGS:
                    Type: 97  Length: 1  Inst: 0
                    Value:
                        VB : 1                                   >> voice bearer as true

        ULI TIMESTAMP:
            Type: 170  Length: 4  Inst: 0
            Value:
                Seconds: 3769747091
        USER LOCATION INFO:
            Type: 86  Length: 13  Inst: 0
            Value:
                Location type: TAI
                MCC: XYZ
                MNC: AB
                TAC: 0x844
                Location type: ECGI
                MCC: XYZ
                MNC: AB
                ECI: 0xDCF8C02

        UE TIME ZONE:
            Type: 114  Length: 2  Inst: 0
            Value:
                TZ: +5:30
                DST: +0 hour

此外，它被PGW接受並啟動承載的釋放。

<<<
       
        
        
 
        [PGW-S5/S2a/S2b]GTPv2C Tx PDU, from 223.224.M.N:2123 to 223.224.P.Q:39632 (17) 
        
 
        TEID: 0x8064A25A, Message type: EGTP_DELETE_BEARER_REQUEST (0x63) 
        
 
        Sequence Number: 0xE9625A (15295066) 
        
 
        GTP HEADER 
        
 
                Version number: 2 
        
 
                TEID flag: Present 
        
 
                Piggybacking flag: Not present 
        
 
                Message Priority flag: Not present 
        
 
                Message Priority: NA 
        
 
                Message Length: 0x000D (13) 
        
 
        
 
        INFORMATION ELEMENTS 
        
 
                EPS BEARER ID: 
        
 
                    Type: 73  Length: 1  Inst: 1 
        
 
                    Value: 7

從PGW到PCRF的CCR關於計費規則報告AVP，故障代碼顯示為PS_CS_Handover。

<<<
        
         
         
 
         Diameter message from 10.206.17.X:51119 to 10.5.40.Y:3007 
         
 
           Base Header Information: 
         
 
            Version:            0x01        (1) 
         
 
            Message Length:     0x000260    (608) 
         
 
            Command Flags:      0xc0        (192) REQ PXY  
         
 
            Command Code:       0x000110    (272) Credit-Control-Request 
         
 
            Application ID:     0x01000016  (16777238)   3GPP-Gx 
         
 
            Hop2Hop-ID:         0xaebac4d3  (2931475667) 
         
 
            End2End-ID:         0x19b8ec95  (431549589) 
         
 
           AVP Information: 
         
 
              [M]  Session-Id 
         
 
                 Code:      0x00000107 (263) Session-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00004e   (78) 
         
 
                 Data: 0007-diamproxy.asr55k.dra.gx;1020935924;202167245;5d0747d1-cd02 
         
 
         
 
              [M]  Auth-Application-Id 
         
 
                 Code:      0x00000102 (258) Auth-Application-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00000c   (12) 
         
 
                 Data: 16777238 
         
 
         
 
              [M]  Origin-Host 
         
 
                 Code:      0x00000108 (264) Origin-Host 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00002b   (43) 
         
 
                 Data: 0007-diamproxy.asr55k.dra.gx 
         
 
         
 
              [M]  Origin-Realm 
         
 
                 Code:      0x00000128 (296) Origin-Realm 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00001a   (26) 
         
 
                 Data: cisco.com 
         
 
         
 
              [M]  Destination-Realm 
         
 
                 Code:      0x0000011b (283) Destination-Realm 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00002a   (42) 
         
 
                 Data: PCRF.MNC0AB.MCCXYZ.3GPPNETWORK.ORG 
         
 
         
 
              [M]  CC-Request-Type 
         
 
                 Code:      0x000001a0 (416) CC-Request-Type 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00000c   (12) 
         
 
                 Data: UPDATE_REQUEST (2) 
         
 
         
 
              [M]  CC-Request-Number 
         
 
                 Code:      0x0000019f (415) CC-Request-Number 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00000c   (12) 
         
 
                 Data: 2 
         
 
         
 
              [M]  Destination-Host 
         
 
                 Code:      0x00000125 (293) Destination-Host 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x000037   (55) 
         
 
                 Data: PCRF01.NO.DC.PCRF.MNC0AB.MCCXYZ.3GPPNETWORK.ORG 
         
 
         
 
              [M]  Origin-State-Id 
         
 
                 Code:      0x00000116 (278) Origin-State-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00000c   (12) 
         
 
                 Data: 1559087623 
         
 
         
 
              [M]  Subscription-Id 
         
 
                 Code:      0x000001bb (443) Subscription-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x000028   (40) 
         
 
                  [M]  Subscription-Id-Type 
         
 
                     Code:      0x000001c2 (450) Subscription-Id-Type 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x00000c   (12) 
         
 
                     Data: END_USER_E164 (0) 
         
 
         
 
                 [M]  Subscription-Id-Data 
         
 
                     Code:      0x000001bc (444) Subscription-Id-Data 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x000014   (20) 
         
 
                     Data: 121234567891 
         
 
         
 
              [M]  Subscription-Id 
         
 
                 Code:      0x000001bb (443) Subscription-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00002c   (44) 
         
 
                  [M]  Subscription-Id-Type 
         
 
                     Code:      0x000001c2 (450) Subscription-Id-Type 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x00000c   (12) 
         
 
                     Data: END_USER_IMSI (1) 
         
 
         
 
                  [M]  Subscription-Id-Data 
         
 
                     Code:      0x000001bc (444) Subscription-Id-Data 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x000017   (23) 
         
 
                     Data: XYZAB1234567891 
         
 
         
 
              [M]  Framed-IPv6-Prefix 
         
 
                 Code:      0x00000061 (97) Framed-IPv6-Prefix 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x000012   (18) 
         
 
                 Data: Reserved: 00 Prefixlen: 64 IPv6 prefix: 2401:4900:4071:32ec:: 
         
 
         
 
              [M]  User-Equipment-Info 
         
 
                 Code:      0x000001ca (458) User-Equipment-Info 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00002c   (44) 
         
 
                  [M]  User-Equipment-Info-Type 
         
 
                     Code:      0x000001cb (459) User-Equipment-Info-Type 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x00000c   (12) 
         
 
                     Data: IMEISV (0) 
         
 
         
 
                  [M]  User-Equipment-Info-Value 
         
 
                     Code:      0x000001cc (460) User-Equipment-Info-Value 
         
 
                     Flags:     0x40       (64)  [M] 
         
 
                     Length:    0x000018   (24) 
         
 
                     Data: 9876543211234 
         
 
         
 
              [M]  Called-Station-Id 
         
 
                 Code:      0x0000001e (30) Called-Station-Id 
         
 
                 Flags:     0x40       (64)  [M] 
         
 
                 Length:    0x00000b   (11) 
         
 
                 Data: ims 
         
 
         
 
              [V] [M]  Charging-Rule-Report 
         
 
                 Code:      0x000003fa (1018) Charging-Rule-Report 
         
 
                 Flags:     0xc0       (192) [V]  [M] 
         
 
                 Length:    0x00006c   (108) 
         
 
                 Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                  [V] [M]  Charging-Rule-Name 
         
 
                     Code:      0x000003ed (1005) Charging-Rule-Name 
         
 
                     Flags:     0xc0       (192) [V]  [M] 
         
 
                     Length:    0x00001e   (30) 
         
 
                     Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                     Data: I_AD_VOLTE03D4E98A 
         
 
         
 
                  [V] [M]  Charging-Rule-Name 
         
 
                     Code:      0x000003ed (1005) Charging-Rule-Name 
         
 
                     Flags:     0xc0       (192) [V]  [M] 
         
 
                     Length:    0x00001e   (30) 
         
 
                     Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                     Data: I_AD_VOLTE03D4E989 
         
 
         
 
                  [V] [M]  PCC-Rule-Status 
         
 
                     Code:      0x000003fb (1019) PCC-Rule-Status 
         
 
                     Flags:     0xc0       (192) [V]  [M] 
         
 
                     Length:    0x000010   (16) 
         
 
                     Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                     Data: INACTIVE (1) 
         
 
         
 
                  [V] [M]  Rule-Failure-Code 
         
 
                     Code:      0x00000407 (1031) Rule-Failure-Code 
         
 
                     Flags:     0xc0       (192) [V]  [M] 
         
 
                     Length:    0x000010   (16) 
         
 
                     Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                     Data: PS_TO_CS_HANDOVER (13)                         >> failure code seen as PS_to_CS_Handover    
         
 
         
 
              [V] [M]  Access-Network-Charging-Address 
         
 
                 Code:      0x000001f5 (501) Access-Network-Charging-Address 
         
 
                 Flags:     0xc0       (192) [V]  [M] 
         
 
                 Length:    0x000012   (18) 
         
 
                 Vendor-Id: 0x000028af (10415) 3GPP 
         
 
                 Data: IPv4 223.224.X.Y

需要使用適當的直徑字典來將音訊呼叫通過SRVCC切換從4G中的VoLTE無縫切換到傳統2G/3G網路。在ims-auth-service下將diameter字典更新為3gpp-rel10後，支援此功能。

由思科工程師貢獻

Satya Narayan Panda
Cisco TAC工程師

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