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Content for  TS 23.060  Word version:  17.0.0

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13  Information Storagep. 303

This clause describes information storage structures required for GPRS, and the recovery and restoration procedures needed to maintain service if inconsistencies in databases and lost or invalid database information occur.

13.1  HLR/HSSp. 303

IMSI is the prime key to the subscription data stored in the HLR/HSS. There may be several sets of PS subscription data per IMSI. This is illustrated in Figure 93.
Reproduction of 3GPP TS 23.060, Fig. 93: Subscription Data
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As Figure 93 indicates, the PS subscription data is at the same level as basic services. Each PDP subscription is seen as a basic service. Supplementary services are provisioned as part of the overall subscription. Activation of SSs is either at the basic service level (SS1) or at the overall subscription level (SS2).
Table 5 shows the GPRS/EPS subscription data contained in the HLR/HSS.
Field Description
IMSIIMSI is the main reference key.
MSISDNThe basic MSISDN of the MS. (Presence of the MSISDN is optional).
SGSN NumberThe SS7 number of the SGSN currently serving this MS.
SGSN AddressThe IP address of the SGSN currently serving this MS.
Subscribed Charging CharacteristicsThe charging characteristics for the MS, e.g. normal, prepaid, flat-rate, and/or hot billing subscription.
Trace ReferenceIdentifies a record or a collection of records for a particular trace.
Trace TypeIndicates the type of trace, e.g. MSC/BSS trace, HLR trace, and/or SGSN/GGSN/BSS trace.
OMC IdentityIdentifies the OMC that shall receive the trace record(s).
SMS ParametersSMS-related parameters, e.g. operator-determined barring.
MS PS Purged for GPRSIndicates that the MM and PDP contexts of the MS are deleted from the SGSN.
MNRGIndicates that the MS is not reachable through an SGSN, and that the MS is marked as not reachable at the SGSN and possibly at the GGSN.
GGSN list The GSN number and optional IP address pair related to the GGSN that shall be contacted when activity from the MS is detected and MNRG is set. The GSN number shall be either the number of the GGSN or the protocol-converting GSN as described in the clauses "MAP-based GGSN-HLR Signalling" and "GTP and MAP-based GGSN HLR Signalling".
GPRS CSIOptional GPRS CAMEL subscription information, see TS 23.016
MG-CSIOptional Mobility Management for GPRS CAMEL subscription information, see TS 23.016.
APN-OI ReplacementIndicates the domain name to replace the APN-OI when constructing the GGSN/PDN-GW FQDN upon which to perform a DNS resolution. This replacement applies for all the APNs in the subscriber's profile. See TS 23.003, clause 9.1.2 for more information on the format of domain names that are allowed in this field.
ODB for PS parametersIndicates that the status of the operator determined barring for packet oriented services.
Access RestrictionIndicates the access restriction subscription information. (Note, the access restriction applies to both packet and circuit oriented services) and it includes restriction information on the use of NR as a secondary RAT for user plane connectivity.
IMEIInternational Mobile Equipment Identity
SVNSoftware Version Number
RFSP IndexAn index to specific RRM configuration in the UTRAN/GERAN
CSG Subscription DataThe CSG Subscription Data is a list of CSG IDs per PLMN and for each CSG ID optionally an associated expiration date which indicates the point in time when the subscription to the CSG ID expires; an absent expiration date indicates unlimited subscription.
For a CSG ID that can be used to access specific PDNs via Local IP Access, the CSG ID entry includes the corresponding APN(s).
VPLMN LIPA AllowedSpecifies per PLMN whether the UE is allowed to use LIPA.
Subscribed UE-AMBRThe Maximum Aggregated uplink and downlink MBRs to be shared across all Non-GBR PDP contexts according to the subscription of the user.
URRP-SGSN UEReachability Request Parameter indicating that UE activity notification from SGSN has been requested by the HLR/HSS.
Homogenous Support of IMS Voice over PS Sessions for SGSN Indicates per UE and SGSN if "IMS Voice over PS Sessions" is homogeneously supported in all RAs in the serving SGSN or homogeneously not supported, or, support is non-homogeneous/unknown, see clause 5.3.8A.
Subscribed periodic RAU/TAU TimerIndicates a subscribed periodic RAU/TAU timer value.
Extended idle mode DRX cycle lengthIndicates a subscribed extended idle mode DRX cycle length value.
UE-SRVCC-CapabilityIndicates whether the UE is UTRAN/GERAN SRVCC capable or not.
Group ID-listList of the subscribed group(s) that the MS belongs to.
UE Usage TypeIndicates the usage characteristics of the UE for use with Dedicated Core Networks (see clause 5.3.23).
Enhanced Coverage RestrictedSpecify PLMN(s) with Enhanced Coverage restrictions.
Monitoring Event Information DataDescribes the monitoring event configuration information. See TS 23.682 for more information.
Each subscription profile may also contain one or more APN configurations:
PDP/EPS Bearer Context IdentifierIndex of the PDP/EPS Bearer context (Note 3).
PDP TypePDP type, e.g. PPP, IP (IPv4, IPv6, IPv4v6) or Non-IP.
PDP AddressPDP address, e.g., an IP address. This field shall be empty if dynamic addressing is allowed.
APN-OI ReplacementAPN level APN-OI Replacement which has the same role as the UE level APN-OI Replacement but with higher priority than UE level APN-OI Replacement. This is an optional parameter. When available, it shall be used to construct the GGSN/PDN-GW FQDN instead of UE level APNOI Replacement. See TS 23.003, clause 9.1.2 for more information on the format of domain names that are allowed in this field.
Access Point NameA label according to DNS naming conventions describing the access point to the packet data network. For S4-SGSN the APN to be used as default APN is indicated.
Invoke SCEF SelectionIndicates whether this APN is used for establishing connection to the SCEF.
SCEF ID Indicates the FQDN or IP address of the SCEF which is to be selected for this APN. It is required if "Invoke SCEF Selection" indicator is set.
SIPTO permissionsIndicates whether the traffic associated with this APN is prohibited for SIPTO, allowed for SIPTO excluding SIPTO at the local network, allowed for SIPTO including SIPTO at the local network or allowed for SIPTO at the local network only (NOTE 2).
LIPA permissionsIndicates whether the PDN can be accessed via Local IP Access. Possible values are: LIPA-prohibited, LIPA-only and LIPA-conditional.
WLAN offloadabilityIndicates whether the traffic associated with this APN is allowed to be offloaded to WLAN using the WLAN/3GPP Radio Interworking feature or if it shall be kept on 3GPP access (see clause 5.3.21). The indication may contain separate values per RAT (E-UTRA and UTRA).
QoS Profile SubscribedThe quality of service profile subscribed. QoS Profile Subscribed is the default level if a particular QoS profile is not requested. . QoS Profile Subscribed is also the maximum QoS per PDP context to the associated APN.
Subscribed Evolved ARPThe Subscribed Evolved ARP for PDP contexts associated with the APN.
VPLMN Address AllowedSpecifies per VPLMN whether the MS is allowed to use the APN in the domain of the HPLMN only, or additionally the APN in the domain of the VPLMN.
PDP/EPS Bearer context Charging CharacteristicsThe charging characteristics of this PDP/EPS Bearer context, e.g. normal, prepaid, flat-rate, and/or hot billing.
EPS subscribed QoS profileThe EPS bearer level QoS parameter values for that APN's default bearer (QCI and ARP).
APN-AMBRThe maximum aggregated uplink and downlink MBR values to be shared across all Non-GBR EPS bearers, which are established for this APN.
P GW/GGSN addressThe address currently used for the P-GW/GGSN supporting this APN.
PDN continuity at inter RAT mobility Defines per APN how to handle a PDN connection when the UE moves between "broadband" (WB-E-UTRAN and UTRAN) and "narrowband" (NB-IoT, GPRS, EC-GSM-IoT). Possible values are: maintain the PDN connection; disconnect the PDN connection with a reactivation request; disconnect PDN connection without reactivation request; or to leave it to local VPLMN policy.
NOTE 1:
IMEI and SVN are stored in HLR/HSS when the Automatic Device Detection feature is supported, see clause 15.5.
NOTE 2:
In this specification, the values "prohibited for SIPTO" and "allowed for SIPTO excluding SIPTO at the local network" correspond to the pre Rel 12 values "prohibited for SIPTO" and "allowed for SIPTO". Actual coding of these values belongs to Stage 3 domain.
NOTE 3:
For an S4-SGSN there may be at most two default APNs for a given user. One default APN can belong to either of the three PDN types of "IPv4", "IPv6", or "IPv4v6", and another default APN can belong to PDN type of "Non-IP".
An expired CSG subscription should not be removed from the HLR/HSS subscription data before it is removed from the MS's Allowed CSG list or Operator CSG list. When a CSG subscription is cancelled it should be handled as an expired subscription in HLR/HSS subscription data to allow for removing it from MS's Allowed CSG list or Operator CSG list first.
If the LIPA permission and SIPTO permission flags are both included for a particular APN, they shall be set in a consistent manner, e.g. if the LIPA permission is set to LIPA-only or LIPA-conditional, the SIPTO permission shall be set to SIPTO-prohibited. Conversely, if the SIPTO permission indicates the APN is a SIPTO-allowed APN, the LIPA permission shall be set to LIPA-prohibited. A SIPTO-allowed APN is an APN for which the SIPTO permission is set to allowed for SIPTO excluding SIPTO at the local network, allowed for SIPTO including SIPTO at the local network or allowed for SIPTO at the local network only.
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13.2  SGSNp. 306

13.2.1  General |R8|p. 306

SGSN maintains MM context and PDP/EPS bearer context information for MSs in the STANDBY, READY, PMM IDLE, and PMM CONNECTED states. Table 6 shows the context fields for one MS.
During the Intersystem Change, when new Authentication and Key Agreement is not performed, the KSI in the new 3G-SGSN shall be assigned the value of the CKSN, which has been sent by the MS. Similarly, in the new 2G-SGSN, when AKA does not take place, the CKSN shall be assigned the value of the KSI, which has been sent by the MS.
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13.2.2  Parameter exchange between S4-SGSNs |R8|p. 306

The S4-SGSN also maintains parameters related to MME use without interpreting them.
For that reason the MM Context and PDP/EPS Bearer Context also includes information that is used by MME but only stored and forwarded by SGSN.

13.2.3  Context fields for one MS |R8|p. 307

Field Description A/Gb mode Iu mode
IMSIIMSI is the main reference key.XX
IMSI-unauthenticated-indicatorThis is an IMSI indicator to show the IMSI is unauthenticated.X
MM StateMobility management state, IDLE, STANDBY, READY, PMM DETACHED, PMM IDLE, or PMM CONNECTED.XX
P TMSIPacket Temporary Mobile Subscriber Identity.XX
P TMSI SignatureA signature used for identification checking purposes.XX
IMEIInternational Mobile Equipment IdentityXX
SVN Software Version Number (stored by SGSNs supporting the "Provision of UE Specific Behaviour Information to Network Entities" feature as defined in TS 23.195.) or the "Automatic Device Detection" feature, see clause 15.5. 3)X
MSISDNThe basic MSISDN of the MS. The presence is dictated by its storage in the HLR/HSS.XX
Routeing AreaCurrent routeing area.XX
Cell IdentityCurrent cell in READY state, last known cell in STANDBY or IDLE state.X
Cell Identity AgeTime elapsed since the last LLC PDU was received from the MS at the SGSN.X
Service Area CodeLast known SAC when initial UE message was received or Location Reporting procedure was executed.X
Service Area Code AgeTime elapsed since the last SAC was received at the 3G SGSN.X
CSG IDLast known CSG ID when the UE was active.X
CSG membershipLast known CSG membership of the MS when the UE was active.X
Access modeAccess mode of last known Cell Identity when the UE was active.X
VLR NumberThe VLR number of the MSC/VLR currently serving this MS.XX
New SGSN AddressThe IP address of the new SGSN where buffered and not sent N-PDUs should be forwarded to.XX
Authentication VectorsAuthentication and ciphering parameters (authentication triplets or quintets).XX
KcCurrently used A/Gb mode ciphering key.X2)
CKSNCiphering key sequence number of Kc.X2)
Ciphering algorithmSelected ciphering algorithm.XX
CK Currently used Iu mode ciphering key.1)X
IK Currently used Iu mode integrity key.1)X
KSIKey Set Identifier.1)X
MS Radio Access CapabilityMS, mostly GERAN, radio access capabilities.X
MS Radio Access Capabilities for other RATsMS's Radio access capabilities for UTRAN (needed only for PS handover support)X
MS Classmark 2GERAN/UTRAN CS domain core network Classmark (used if the MS supports SRVCC to GERAN or UTRAN)XX
MS Classmark 3GERAN CS domain radio network Classmark (used if the MS supports SRVCC to GERAN)XX
Supported CodecsList of codecs supported in the CS domain (used if the MS supports SRVCC to GERAN or UTRAN, see TS 23.216)XX
MS Network CapabilityMS network capabilities.XX
UE Network CapabilityCore network capabilities (stored if the UE supports E-UTRAN)XX
Higher bitrates than 16 Mbps flag Indicates whether assignment of higher bitrates than 16 Mbps is "allowed" (for UE supporting Rel 7 or higher release) or "not allowed" (for UE supporting Rel 6 or lower release) XX
DRX ParametersDiscontinuous reception parameters.XX
Extended Idle mode DRX parametersExended Idle mode DRX parameters provided to the MSXX
Active Time value for PSMMS specific Active Time value allocated by SGSN for power saving mode handling.XX
MNRGIndicates whether activity from the MS shall be reported to the HLR.XX
NGAFIndicates whether activity from the MS shall be reported to the MSC/VLR.XX
PPFIndicates whether paging for PS and CS services can be initiated.XX
Subscribed Charging CharacteristicsThe charging characteristics for the MS, e.g. normal, prepaid, flat-rate, and/or hot billing subscription.XX
Selected CN operator idSelected core network operator identity (to support network sharing as defined in TS 23.251). 4)
Trace ReferenceIdentifies a record or a collection of records for a particular trace.XX
Trace TypeIndicates the type of trace.XX
Trigger IdIdentifies the entity that initiated the trace.XX
OMC IdentityIdentifies the OMC that shall receive the trace record(s).XX
SMS ParametersSMS-related parameters, e.g. operator-determined barring.XX
RecoveryIndicates if HLR/HSS or VLR is performing database recovery.XX
Radio Priority SMSThe RLC/MAC radio priority level for uplink SMS transmission.X
Access RestrictionThe access restriction subscription information. It includes restriction information on the use of NR as secondary RAT.XX
GPRS CSIOptional GPRS CAMEL subscription information, see TS 23.016XX
MG-CSIOptional Mobility Management for GPRS CAMEL subscription information, see TS 23.016.XX
ODB for PS parametersIndicates that the status of the operator determined barring for packet oriented services.XX
APN-OI ReplacementIndicates the domain name to replace the APN-OI when constructing the GGSN/PDN-GW FQDN upon which to perform a DNS resolution. See TS 23.003, clause 9.1.2 for more information on the format of domain names that are allowed in this field.XX
Subscribed UE-AMBRThe Maximum Aggregated uplink and downlink MBR values to be shared across all Non-GBR PDP contexts/bearers according to the subscription of the user.XX
UE-AMBRThe currently used Maximum Aggregated uplink and downlink MBR values to be shared across all Non-GBR PDP context/bearers.XX
APN SubscribedThe APN received from the HLR/HSS. For S4-SGSN the APN to be used as default APN is indicated.XX
CSG Subscription DataThe CSG Subscription Data is associated lists of CSG IDs for the visiting PLMN and the equivalent PLMNs of the visiting PLMN and for each CSG ID optionally an associated expiration date which indicates the point in time when the subscription to the CSG ID expires; an absent expiration date indicates unlimited subscription.
For a CSG ID that can be used to access specific PDNs via Local IP Access, the CSG ID entry includes the corresponding APN(s).
X
LIPA AllowedSpecifies whether the UE is allowed to use LIPA in this PLMN.X
MME IP Address for S3IP address of the MME for the MS when connected via E-UTRAN (used if ISR is activated for the MS).XX
MME TEID for S3Tunnel Endpoint Identifier of the MME for the MS when connected via E-UTRAN (used if ISR is activated for the MS).XX
URRP-SGSNURRP-SGSN indicating that the HSS has requested the SGSN to notify the HSS regarding UE reachability at the SGSNXX
DL Data Buffer Expiration TimeWhen extended buffering of DL data has been invoked for MS that uses power saving functions e.g. PSM, this time is when the buffering will expire.XX
Suggested number of buffered downlink packetsSuggested number of buffered downlink packets at extended buffering. This is an optional parameter.XX
Subscribed RFSP IndexAn index to specific RRM configuration in the UTRAN/GERAN that is received from the HSS.X5)
RFSP Index in UseAn index to specific RRM configuration in the UTRAN/GERAN that is currently in use.X5)
Subscribed Periodic RAU/TAU TimerIndicates a subscribed periodic RAU/TAU timer value.X5)
Voice Support Match IndicatorAn indication whether the UE radio capabilities are compatible with the network configuration for PS voice continuity. The SGSN uses it as an input for setting the IMS voice over PS Session Supported Indication.X
Homogenous Support of IMS Voice over PS Sessions Indicates per UE if "IMS Voice over PS Sessions" is homogeneously supported in all RAs in the serving SGSN or homogeneously not supported, or, support is non-homogeneous/unknown, see clause 5.3.8A. XX
Group IDList of the subscribed group(s) that the UE belongs toXX
UE Usage TypeIndicates the usage characteristics of the UE for use with Dedicated Core Networks (see clause 5.3.23).XX
Monitoring Event Information DataDescribes the monitoring event configuration information. See TS 23.682 for more information.XX
Gb Coverage Class InformationInformation that may be used by BSS to optimize the radio paging procedureX
Delay Tolerant ConnectionIndicates that the PDN connection is delay tolerant such that the GGSN supports holding the procedure, after receiving a reject with a cause indicating that MS is temporarily not reachable due to power saving, until the GGSN receives a message indicating that the MS is available for end to end signallingXX
Enhanced Coverage RestrictedSpecifies whether the UE is restricted to use enhanced coverage feature or not.X
> For each active PDN connection with GGSN (using Gn/Gp) or with S-GW (using S4):
APN in UseThe APN currently used. This APN shall be composed of the APN Network Identifier and the default APN Operator Identifier as specified in TS 23.003, clause 9.1.2. Any received value in the APN-OI Replacement field in the subscription data is not applied here.XX
APN RestrictionDenotes the restriction on the combination of types of APN for the APN associated with this PDP Context. (See Note)XX
APN-OI ReplacementAPN level APN-OI Replacement which has the same role as the UE level APN-OI Replacement but with higher priority than UE level APN-OI Replacement. This is an optional parameter. When available, it shall be used to construct the GGSN/PDN-GW FQDN instead of UE level APN-OI Replacement. See TS 23.003, clause 9.1.2 for more information on the format of domain names that are allowed in this field.XX
PDN continuity at inter RAT mobility Defines per APN how to handle a PDN connection when the UE moves between "broadband" (WB-E-UTRAN and UTRAN) and "narrowband" (NB-IoT, GPRS, EC-GSM-IoT). Possible values are: maintain the PDN connection; disconnect the PDN connection with a reactivation request; disconnect PDN connection without reactivation request; or to leave it to local VPLMN policy. XX
SIPTO permissionsIndicates whether the traffic associated with this APN is prohibited for SIPTO, allowed for SIPTO excluding SIPTO at the local network, allowed for SIPTO including SIPTO at the local network or allowed for SIPTO at the local network only.X
Local Home Network IDIf SIPTO@LN is enabled for this PDN connection it indicates the identity of the Local Home Network to which the (H)NB/RNC belongs.X
LIPA permissionsIndicates whether the PDN can be accessed via Local IP Access. Possible values are: LIPA-prohibited, LIPA-only and LIPA-conditional.X
WLAN offloadabilityIndicates whether the traffic associated with this APN is allowed to be offloaded to WLAN using the WLAN/3GPP Radio Interworking feature or if it shall be kept on 3GPP access (see clause 5.3.21). The indication may contain separate values per RAT (E-UTRA and UTRA).X
Subscribed APN-AMBRThe maximum aggregated uplink and downlink MBRs to be shared across all Non-GBR PDP contexts/EPS Bearers established for this APN according to the subscription of the user.XX
Negotiated APN-AMBRThe maximum aggregated uplink and downlink MBRs to be shared across all Non-GBR PDP contexts/EPS Bearers established for this APN according to the GGSN/PGW decision.XX
VPLMN Address AllowedSpecifies whether the MS is allowed to use the APN in the domain of the HPLMN only, or additionally the APN in the domain of the VPLMN.XX
EPS subscribed QoS profileThe bearer level QoS parameter values for that APN's default bearerXX
Subscribed Evolved ARPThe Evolved ARP for this PDN connection according to the subscription of the userXX
GGSN or P-GW TEID on Gn/Gp or S5/S8 (control plane)Tunnel Endpoint Identifier at the GGSN or P-GW on the Gn/Gp or S5/S8 interfaces for control plane signallingXX
GGSN or P-GW IP Address in Use (control plane)The IP address of the GGSN (using Gn/Gp) or P-GW (when using S4) for control plane signallingXX
SGSN IP address for Gn/Gp or S4 (control plane)SGSN IP address for the Gn/Gp (used by GGSN) or S4 (used by S-GW) for control plane signallingXX
SGSN TEID for Gn/Gp or S4 (control plane)SGSN Tunnel Endpoint Identifier for the Gn/Gp used by GGSN) or S4 (used by S-GW) for control plane signalling.XX
S-GW IP address for S11/S4 (control plane)S-GW IP address for the S11 and S4 interfacesXX
S-GW TEID for S11/S4 (control plane)S-GW Tunnel Endpoint Identifier for the S11 and S4 interfaces.XX
low access priorityIndicates that the UE requested low access priority when the PDN connection was opened (see Note 6).XX
> For each active PDN connection with S-GW (using S4):
Default bearerIdentifies the NSAPI of the default bearer, corresponding to the PDP context which was first established within the given PDN connection.XX
PDN-GW GRE Key for uplink traffic (user plane)PDN-GW assigned GRE Key for the S5/S8 interface for the user plane for uplink traffic. (For PMIP-based S5/S8 only)XX
Presence Reporting Area ActionDenotes the need to send a change of UE presenence in a Presence Reporting Area. This field denotes separately the PRA identifier(s) and the list(s) of Presence Reporting Area elements (if provided by the PDN-GW). The status (i.e. active or inactive) for each Presence Reporting Area is stored in the S4-SGSN when dynamic resource handling for Presence Reporting Area is configured in the S4-SGSN.XX
Each MM context contains zero or more of the following PDP/EPS bearer contexts within the PDN connection:
PDP/EPS bearer Context IdentifierIndex of the PDP/EPS bearer context.XX
PDP StatePacket data protocol state, INACTIVE or ACTIVE.XX
PDP/PDN TypePDP type (e.g. PPP) or PDN type (e.g., IPv4, IPv6, IPv4v6 or Non-IP)XX
SCEF IDThe IP address of the SCEF currently being used for providing connection to the SCEF.X
PDP/PDN AddressPDP/PDN address, e.g., an IP address.XX
NSAPI/EPS bearer IDNetwork layer Service Access Point Identifier. There is a 1:1 mapping between the NSAPI and the EPS bearer ID.XX
TITransaction Identifier.XX
TEID for IuTunnel Endpoint Identifier for the Iu interface.X
GGSN or P-GW TEID (user plane)Tunnel Endpoint Identifier of the GGSN or P-GW for user-plane traffic.
(NOTE 4)
XX
GGSN or P-GW IP address (user plane)The IP address of the GGSN or P-GW for user-plane traffic.
(NOTE 5)
XX
S-GW IP address (user plane)S-GW IP address for user plane.XX
S-GW TEID (user plane)S-GW Tunnel Endpoint Identifier for user plane.XX
SGSN IP address (user plane)SGSN IP address used by GGSN for Gn/Gp or by S-GW for S4 for user plane downlink traffic.XX
SGSN TEID (user plane)SGSN Tunnel Endpoint Identifier used by GGSN for Gn/Gp or by S-GW for S4 for user plane downlink traffic.XX
QoS Profile SubscribedThe quality of service profile subscribed.XX
QoS Profile RequestedThe quality of service profile requested.XX
QoS Profile NegotiatedThe quality of service profile negotiated. This also represents the EPS Bearer QoS parameters QCI and ARP and optionally GBR and MBR in case of GBR bearerXX
Negotiated Evolved ARPThe evolved ARP to be used for this PDP context as authorized by the GGSNXX
Radio PriorityThe RLC/MAC radio priority level for uplink user data transmission.X
Packet Flow IdPacket flow identifier.X
Aggregate BSS QoS Profile NegotiatedThe aggregate BSS quality of service profile negotiated for the packet flow that this PDP context belongs to.X
Send N-PDU NumberSNDCP sequence number of the next downlink N-PDU to be sent to the MS.X
Receive N-PDU NumberSNDCP sequence number of the next uplink N-PDU expected from the MS.X
GTP SNDGTP-U sequence number of the next downlink N-PDU to be sent to the MS.XX
GTP SNUGTP-U sequence number of the next uplink N-PDU to be sent to the GGSN.XX
PDCP SNDSequence number of the next downlink in-sequence PDCP PDU to be sent to the MS.X
PDCP SNUSequence number of the next uplink in-sequence PDCP PDU expected from the MS.X
Charging IdCharging identifier, identifies charging records generated by SGSN, S-GW and P-GW/GGSN.
(NOTE 3)
XX
PDP/EPS bearer Context Charging CharacteristicsThe charging characteristics of this PDP/EPS bearer context, e.g. normal, prepaid, flat-rate, and/or hot billing.XX
RNC Address in UseThe IP address of the RNC/BSC currently used.X
Prohibit Payload CompressionIndicates that the SGSN should negotiate no data compression for this PDP context.X
DTIIndicates whether SGSN has established direct user plane tunnel between RNC and GGSN (using Gn/Gp) or between RNC and S-GW (using S12) for this PDP context.X
MS Info Change Reporting ActionDenotes the need to send changes in CGI/SAI or RAI to the GGSN (using Gn/Gp) or S-GW (using S4) associated with this PDP Context. (See Note 2).XX
CSG Information Reporting ActionDenotes the need to send changes in User CSG Information to the GGSN (using Gn/Gp) or S-GW (using S4) associated with this PDP Context. (See Note 2).
This field denotes separately whether the SGSN is requested to send changes in User CSG Information for (a) CSG cells, (b) hybrid cells in which the subscriber is a CSG member, and (c) hybrid cells in which the subscriber is not a CSG member, or any combination of the above.
XX
CGI/SAI/RAI change support indicationDenotes the indicated level of support to the GGSN (using Gn/Gp) or S-GW (using S4) associated with this PDP Context
(See Note 2).
XX
BCMThe negotiated BCM.XX
> For each PDP/EPS bearer context with S-GW (using S4):
DL TFTDownlink Traffic Flow Template. (For PMIP-based S5/S8 only)XX
UL TFTUplink Traffic Flow Template. (For PMIP-based S5/S8 only)XX
NOTE 1:
The SGSN might not have information on the allocated IPv4 address. Alternatively, following mobility involving a pre-Release 8 SGSN, this IPv4 address might not be the one allocated to the MS.
NOTE 2:
APN Restriction, CGI/SAI/RAI change support indication, MS Info Change Reporting Action and CSG Information Reporting Action shall not be transferred between SGSNs during mobility management, unless the connectivity between the SGSNs is based on S16.
NOTE 3:
When the SGSN is connected with a S-GW through S4, then the Charging Id is only applicable for online charging with CAMEL as specified in clause 15.1.0.
NOTE 4:
The PDN-GW TEID is needed in SGSN context as S-GW relocation is triggered without interaction with the source S-GW. The Target S-GW requires this Information Element, so it must be stored by the SGSN.
NOTE 5:
The PDN-GW IP address is needed in SGSN context as S-GW relocation is triggered without interaction with the source. The Target S-GW requires this Information Element, so it must be stored by the SGSN.
NOTE 6:
The low access priority indicator is only stored for the purpose to be included in charging records.
The information marked with a "1)" in Table 6 may be maintained if authentication is performed by the UMTS authentication procedure.
The information marked with a "2)" in Table 6 may be maintained if authentication is performed by the GSM authentication procedure.
The information marked with a "3)" in Table 6 is optional. It can be sent to a new SGSN at RA update.
The information marked with a "4)" in Table 6 is used in networks that support network sharing as defined in TS 23.251.
The information marked with a "5)" in Table 6 is used in UTRAN only.
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13.2.4  SGSN Emergency Configuration Data for Iu Mode |R9|p. 312

The SGSN Emergency Configuration Data is used instead of UE subscription data received from the HSS or the parameters provided by UE in the PDP context created by the PDP Context Activation Procedure for emergency service.
Field Description
Emergency Access Point Name (em APN)A label according to DNS naming conventions describing the access point used for Emergency Bearers (wild card not allowed).
Emergency QoS profileThe bearer level QoS parameter values for Emergency APN's PDP context created by the PDP Context Activation Procedure.
Emergency Evolved ARPThe Evolved ARP value to be used for Emergency APN's PDP context created by the PDP Context Activation Procedure
Emergency APN-AMBR (only for S4-SGSN)The Maximum Aggregated uplink and downlink MBR values to be shared across all Non-GBR bearers, which are established for the Emergency APN, as decided by the PDN-GW.
Emergency PDN-GW/GGSN identityThe statically configured identity of the PDN-GW/GGSN used for emergency APN. The PDN-GW/GGSN identity may be either an FQDN or an IP address.
If the S4-SGSN is used, the Emergency EPS QoS profile (QCI and ARP) is configured. The ARP is an ARP value reserved for emergency bearers. The QCI for Emergency APN's PDP context created by the PDP Context Activation Procedure is set per operator configuration.
If Gn/Gp SGSN is used, the Emergency GPRS QoS profile (Traffic class, Signalling Indication) and Emergency Evolved ARP is used. The Traffic class and Signalling Indication is set per operator configurations. The Emergency Evolved ARP is an Evolved ARP value reserved for emergency bearers.
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13.3  GGSNp. 313

GGSN maintains activated PDP contexts. Table 7 shows the PDP context fields.
Field Description
IMSIInternational Mobile Subscriber Identity.
IMSI-unauthenticated-indicatorThis is an IMSI indicator to show the IMSI is unauthenticated
ME IdentityMobile Equipment Identity (e.g. IMEI/IMEISV)
NSAPINetwork layer Service Access Point Identifier.
MSISDNThe basic MSISDN of the MS. The presence is dictated by its storage in the HLR/HSS.
PDP TypePDP type; e.g. PPP, IP or Non-IP.
PDP AddressPDP address(es); e.g. an IP address.
Dynamic AddressIndicates whether PDP Address is static or dynamic.
APN in UseThe APN Network Identifier currently used, as received from the SGSN.
Negotiated APN-AMBRThe maximum aggregated uplink and downlink MBRs to be shared across all Non-GBR PDP contexts/EPS Bearers established for this APN according to the GGSN/PGW decision.
TEIDTunnel Endpoint Identifier.
TFTTraffic flow template.
QoS Profile NegotiatedThe quality of service profile negotiated.
Negotiated Evolved ARPThe evolved ARP authorized by the GGSN
SGSN AddressThe IP address of the SGSN currently serving this MS.
MNRGIndicates whether the MS is marked as not reachable for PS at the HLR.
RecoveryIndicates if the SGSN is performing database recovery.
GTP SNDGTP-U sequence number of the next downlink N PDU to be sent to the SGSN.
GTP SNUGTP-U sequence number of the next uplink N PDU to be received from the SGSN.
Charging IdCharging identifier, identifies charging records generated by SGSN and GGSN.
Charging CharacteristicsThe charging characteristics for this PDP context, e.g. normal, prepaid, flat-rate, and/or hot billing.
APN-Rate-ControlThe APN-Rate-Control limits the maximum number of uplink/downlink messages per a specific time unit (e.g. minute, hour, day, week) for this APN. It includes an indication as to whether or not Exception reports may still be sent when the limit has been met.
Trace ReferenceIdentifies a record or a collection of records for a particular trace.
Trace TypeIndicates the type of trace.
Trigger IdIdentifies the entity that initiated the trace.
OMC IdentityIdentifies the OMC that shall receive the trace record(s).
Prohibit Payload CompressionIndicates that the SGSN should negotiate no data compression for this PDP context.
SGSN support for MS Info Change ReportingIndicated that the SGSN serving the MS supports procedures for reporting CGI/SAI/RAI and/or User CSG Information changes according to clause 15.1.1a.
MS Info Change Reporting ActionDenotes whether the SGSN is requested to send changes in CGI/SAI or RAI to the GGSN (using Gn/Gp) or S-GW (using S4) associated with this PDP Context.
CSG Information Reporting ActionDenotes whether the SGSN is requested to send changes in User CSG Information to the GGSN (using Gn/Gp) or S-GW (using S4) associated with this PDP Context.
This field denotes separately whether the SGSN is requested to send changes in User CSG Information for (a) CSG cells, (b) hybrid cells in which the subscriber is a CSG member, and (c) hybrid cells in which the subscriber is not a CSG member, or any combination of the above.
BCMThe negotiated Bearer Control Mode.
DTIIndicates whether SGSN has established direct user plane tunnel between RNC and GGSN for this PDP Context.
If a PDP context is enabled for network-requested PDP context activation, then IMSI, PDP Type, PDP Address, SGSN Address and MNRG contain valid information also when the PDP context is inactive and when the MS is GPRS-detached.
For emergency attached UEs which are not authenticated, IMEI is stored in context.
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13.3a  Serving GW |R8|p. 314

The information storage for the Serving GW to support MS access to the EPC via UTRAN or GERAN is described in TS 23.401.

13.3b  PDN GW |R8|p. 314

The information storage for the PDN-GW to support MS access to the EPC via UTRAN or GERAN is described in TS 23.401.

13.4  MSp. 315

Each MS supporting GPRS maintains MM and PDP context information in IDLE, STANDBY, READY, PMM DETACHED, PMM IDLE, and PMM CONNECTED states. The information may be contained in the MS and the TE. Table 8 shows the MS context fields. An E-UTRAN capable MS maintains additional information, e.g. a TIN. The additional information is described in TS 23.401.
Field SIM Description A/Gb mode Iu mode
IMSIG, UInternational Mobile Subscriber Identity.XX
MM StateMobility management state, IDLE, STANDBY, READY, PMM DETACHED, PMM IDLE, or PMM CONNECTED.XX
P-TMSIG, UPacket Temporary Mobile Subscriber Identity.XX
P-TMSI SignatureG, UA signature used for identification checking purposes.XX
Routeing AreaG, UCurrent routeing area.XX
Cell IdentityCurrent cell.X
KcGCurrent A/Gb mode ciphering key.X2)
KSI / CKSNG, UKey Set Identifier for IK Next, CK Next / key sequence number of Kc.XX
Ciphering algorithmSelected ciphering algorithm.XX
CKCurrently used Iu mode ciphering key.1)X
CK NextUIu mode ciphering key to be used after the next security mode command.1)X
IKCurrently used Iu mode integrity key.1)X
IK NextUIntegrity key to be used after the next security mode command.1)X
MS Radio Access CapabilityMS radio access capabilities.XX
UE CapabilityUE radio capabilities.X
MS Network CapabilityMS network capabilities.XX
DRX ParametersDiscontinuous reception parameters.XX
Extended idle mode DRX parametersExtended idle mode DRX parameters received from the SGSN.XX
Active Time value for PSMMS specific Active Time value allocated by SGSN for power saving mode handling.XX
Radio Priority SMSThe RLC/MAC radio priority level for uplink SMS transmission.X
Allowed CSG listThe Allowed CSG list, which is under both user and operator control, indicates the list of CSG IDs and the associated PLMN where the MS is a member.X
Operator CSG listThe Operator CSG list, which is under exclusive Operator control, indicates the list of CSG IDs and the associated PLMN where the MS is a member.X
Each MM context contains zero or more of the following PDP contexts:
PDP TypePDP type, e.g. PPP, IP or Non-IP.XX
PDP AddressPDP address; e.g. an IP address.XX
PDP StatePacket data protocol state, INACTIVE or ACTIVE.XX
Dynamic Address AllowedSpecifies whether the MS is allowed to use a dynamic address.XX
APN RequestedThe APN requested.XX
NSAPINetwork layer Service Access Point Identifier.XX
TITransaction Identifier.XX
QoS Profile RequestedThe quality of service profile requested.XX
QoS Profile NegotiatedThe quality of service profile negotiated.XX
TFTTraffic flow template.XX
Radio PriorityThe RLC/MAC radio priority level for uplink user data transmission.X
Packet Flow IdPacket flow identifier.X
Send N PDU NumberSNDCP sequence number of the next uplink N PDU to be sent to the SGSN.XX
Receive N PDU NumberSNDCP sequence number of the next downlink N PDU expected from the SGSN.XX
PDCP SNDSequence number of the next downlink in-sequence PDCP PDU expected from the RNC.X
PDCP SNUSequence number of the next uplink in-sequence PDCP PDU to be sent to the RNC.X
BCMThe negotiated Bearer Control ModeXX
WLAN offloadabilityIndicates whether the traffic associated with this PDN Connection is allowed to be offloaded to WLAN using the WLAN/3GPP Radio Interworking feature or if it shall be kept on 3GPP access (see clause 5.3.21). The indication may contain separate values per RAT (E-UTRA and UTRA).X
APN-Rate-ControlThe APN-Rate-Control limits the maximum number of uplink messages per a specific time unit (e.g. minute, hour, day, week) for this APN. It includes an indication as to whether or not Exception reports may still be sent when the limit has been met.X
The information marked with a "1)" in Table 8 may be maintained if authentication is performed by the UMTS authentication procedure.
The information marked with a "2)" in Table 8 may be maintained if authentication is performed by the GSM authentication procedure.
The information marked with a "U" in Table 8 shall be stored in the USIM.
The information marked with a "G" in Table 8:
  • shall be stored in the GSIM if the connected SIM is GPRS-aware; and
  • may be stored in the ME after GPRS detach if the connected GSIM is not GPRS-aware.
If the GSIM is GPRS service-aware, then the IMSI, P-TMSI, P-TMSI Signature, Routeing Area, Kc, and CKSN stored in the GSIM shall be used for GPRS services.
If the GSIM is not GPRS service-aware, the P-TMSI, P-TMSI Signature, Routeing Area, Kc, and CKSN stored in the ME shall be used if and only if the IMSI stored in the GSIM is identical to the IMSI image maintained in the ME. If the IMSI stored in the GSIM is different from the IMSI image in the ME, the IMSI image in the ME shall not be used, and the MS shall identify itself with the IMSI stored in the SIM when performing a GPRS attach. IMSI, P-TMSI, P-TMSI Signature, Routeing Area, Kc, and CKSN may be stored in the ME after the GPRS attach has been successfully performed.
When using a USIM, the IMSI, P-TMSI, P-TMSI Signature, Routeing Area, Kc, CK Next, IK Next, and CKSN / KSI stored in the USIM, and the CK and IK stored in the ME, shall be used for GPRS services.
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13.5  MSC/VLRp. 316

The MSC/VLR may store the SGSN number of GPRS-attached MSs that are also IMSI-attached. Table 9 shows the MSC/VLR association for one MS.
Field Description
IMSIIMSI is the main reference key.
SGSN NumberThe SGSN number of the SGSN currently serving this MS.
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13.6  BSS in A/Gb modep. 316

Table 10 shows the BSS context fields for one MS.
Field Description
IMSIIMSI is the main reference key.
TLLITemporary Logical Link Identity.
Trace ReferenceIdentifies a record or a collection of records for a particular trace.
Trace TypeIndicates the type of trace.
Trigger IdIdentifies the entity that initiated the trace.
OMC IdentityIdentifies the OMC that shall receive the trace record(s).
RFSP IndexAn index to specific RRM configuration in GERAN
Each BSS context contains one or more BSS Packet Flow contexts:
Packet Flow IdPacket flow identifier.
Aggregate BSS QoS Profile NegotiatedThe aggregate BSS quality of service profile negotiated for this packet flow.
BSS Packet Flow TimerBSS packet flow context inactivity timer.
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13.7  RNC/BSC for Iu modep. 317

RNC/BSC maintains RNC/BSC Context for CN-related information in PMM CONNECTED state. RNC/BSC also contains RAB contexts for activated RABs. Table 11 shows the context fields for one MS.
For emergency attached UEs which are not authenticated, IMEI is stored in context.
Field Description
IMSIIMSI is the main reference key.
ME IdentityMobile Equipment Identity (e.g. IMEI/IMEISV).
UE CapabilityUE radio capabilities.
UESBI-Iu Stored by an RNC which supports the "Provision of UE Specific Behaviour Information to Network Entities" feature defined in TS 23.195.
UESBI-Uu Stored by an RNC which supports the "Provision of UE Specific Behaviour Information to Network Entities" feature defined in TS 23.195.
SAICurrent or last known SAI
SAI ageTime elapsed since the RNC last established the UE's last known SAI
Trace ReferenceIdentifies a record or a collection of records for a particular trace.
Trace TypeIndicates the type of trace.
Trigger IdIdentifies the entity that initiated the trace.
OMC IdentityIdentifies the OMC that shall receive the trace record(s).
UE-AMBRThe currently used Maximum Aggregated uplink and downlink MBR values to be shared across all Non-GBR bearers.
RFSP IndexAn index to specific RRM configuration in UTRAN (not defined in GERAN Iu mode)
Each RNC context contains zero or more RNC RAB contexts:
RAB IDRadio Access Bearer Identifier.
PDP TypePDP type, e.g. PPP or IP.
TEIDTunnel Endpoint Identifier.
SGSN (or GGSN) Address in UseThe IP address of the SGSN currently used if Direct Tunnel is not established (or GGSN in case of Direct Tunnel).
QoS Profile NegotiatedThe quality of service profile negotiated for this RAB.
GTP SNDGTP-U sequence number of the next downlink in-sequence N PDU to be sent to the MS.
GTP SNUGTP-U sequence number of the next uplink in-sequence N PDU to be sent to the GGSN.
PDCP SNDSequence number of the next downlink in-sequence PDCP PDU to be sent to the MS.
PDCP SNUSequence Number of the next uplink in-sequence PDCP PDU expected from the MS.
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13.8  Direct Tunnel specific error handlingp. 317

Like other restoration procedures Direct Tunnel specific error handling is described in TS 23.007.

13.9Void

13.10  CSS |R11|p. 318

Please refer to TS 23.008 for the content of the information storage for the CSS.

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