TS 23.401 — General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access⚓︎
Release: Rel 15 · Version assessed: 15.3.0 · Network: 4G · Applies to: MME, SGW, PGW, HSS
Mandatory items: 98, of which 92 supported, 3 partially supported, 1 not supported and 2 not applicable. A further 240 clauses of the specification carry no conformance requirement and are not listed.
Mandatory items⚓︎
| Ref. | Item | Status | Support | Remarks |
|---|---|---|---|---|
| 4.3.7.2 | Load balancing between MMEs | Mandatory | Supported | Weights are stored in MME |
| 4.3.8 | Selection functions | Mandatory | Supported | |
| 4.3.8.1 | PDN GW selection function (3GPP accesses) | Mandatory | Supported | |
| 4.3.8.2 | Serving GW selection function | Mandatory | Supported | |
| 4.3.8.3 | MME selection function | Mandatory | Supported | |
| 4.3.12 | IMS Emergency Session Support | Mandatory | Supported | This section is partially supported. |
| 4.3.12.1 | Introduction | Mandatory | Not applicable (Emergency services) | Partially supported: Configuration option 1 and 2 has been combined. |
| 4.3.12.2 | Architecture Reference Model for Emergency Services | Mandatory | Supported | |
| 4.3.12.3 | Mobility and Access Restrictions for Emergency Services | Mandatory | Supported | |
| 4.3.12.3a | Reachability Management for UE in ECM-IDLE state | Mandatory | Supported | |
| 4.3.12.5 | QoS for Emergency Services | Mandatory | Partial | Only QCI and ARP are configured for emergency bearers. |
| 4.3.12.8 | IP Address Allocation | Mandatory | Not applicable (Emergency services) | |
| 4.3.13 | Closed Subscriber Group functions | Mandatory | Partial | CSG identities are decoded, stored and forwarded; CSG membership is not enforced. |
| 4.4.2 | MME | Mandatory | Supported | |
| 4.7.1 | PDN connectivity service | Mandatory | Supported | |
| 4.7.2 | The EPS bearer | Mandatory | Supported | |
| 4.7.2.1 | The EPS bearer in general | Mandatory | Supported | |
| 4.7.2.3 | The EPS bearer with PMIP-based S5/S8 | Mandatory | Supported | |
| 5.0 | Functional description and information flows | Mandatory | Supported | |
| 5.1.1.2 | eNodeB - MME | Mandatory | Supported | |
| 5.1.1.3 | UE - MME | Mandatory | Supported | |
| 5.1.1.8 | MME - S‑GW | Mandatory | Supported | |
| 5.1.1.9 | MME - HSS | Mandatory | Supported | |
| 5.1.1.10 | MME - EIR | Mandatory | Supported | |
| 5.1.1.11 | Void | Mandatory | Supported | |
| 5.2.1 | EPS bearer identity | Mandatory | Supported | |
| 5.2.2 | Globally Unique Temporary UE Identity | Mandatory | Supported | |
| 5.2.3 | Tracking Area Identity (TAI) | Mandatory | Supported | |
| 5.2.4 | eNodeB S1-AP UE Identity (eNB S1-AP UE ID) | Mandatory | Supported | |
| 5.2.5 | MME S1-AP UE Identity (MME S1-AP UE ID) | Mandatory | Supported | |
| 5.2.6 | Closed Subscriber Group ID | Mandatory | Partial | CSG identities are stored and forwarded; an attach from a CSG cell the subscriber is not subscribed to is not rejected. |
| 5.3.2 | Attach procedure | Mandatory | Supported | Legacy network and ISR is not supported |
| 5.3.2.1 | E-UTRAN Initial Attach | Mandatory | Supported | |
| 5.3.2.2 | UTRAN/GERAN Initial Attach | Mandatory | Supported | |
| 5.3.3 | Tracking Area Update procedures | Mandatory | Supported | Legacy network and ISR is not supported |
| 5.3.3.0 | Triggers for tracking area update | Mandatory | Supported | |
| 5.3.3.0A | Provision of UEs TAI to MME in ECM-CONNECTED state | Mandatory | Supported | |
| 5.3.3.1 | Tracking Area Update procedure with Serving GW change | Mandatory | Supported | |
| 5.3.3.2 | E-UTRAN Tracking Area Update without S‑GW Change | Mandatory | Supported | |
| 5.3.4 | Service Request procedures | Mandatory | Supported | |
| 5.3.4.1 | UE triggered Service Request | Mandatory | Supported | |
| 5.3.4.2 | Handling of abnormal conditions in UE triggered Service Request | Mandatory | Supported | |
| 5.3.4.3 | Network Triggered Service Request | Mandatory | Supported | Paging Optimization is not supported. |
| 5.3.5 | S1 release procedure | Mandatory | Supported | |
| 5.3.8 | Detach procedure | Mandatory | Supported | |
| 5.3.8.1 | General | Mandatory | Supported | |
| 5.3.8.2 | UE-initiated Detach procedure | Mandatory | Supported | |
| 5.3.8.2.1 | UE-initiated Detach procedure for E-UTRAN | Mandatory | Supported | |
| 5.3.8.3 | MME-initiated Detach procedure | Mandatory | Supported | The MME runs no implicit detach timer for emergency services. |
| 5.3.8.4 | HSS-initiated Detach procedure | Mandatory | Supported | |
| 5.3.9 | HSS User Profile management function procedure | Mandatory | Supported | |
| 5.3.9.1 | General | Mandatory | Supported | |
| 5.3.9.2 | Insert Subscriber Data procedure | Mandatory | Supported | |
| 5.3.9.3 | Purge function | Mandatory | Supported | |
| 5.3.10 | Security Function | Mandatory | Supported | |
| 5.3.10.1 | General | Mandatory | Supported | |
| 5.3.10.2 | Authentication and Key Agreement | Mandatory | Supported | |
| 5.3.10.3 | User Identity Confidentiality | Mandatory | Supported | |
| 5.3.10.4 | User Data and Signalling Confidentiality | Mandatory | Supported | |
| 5.3.10.4.1 | AS security mode command procedure | Mandatory | Supported | |
| 5.3.10.4.2 | NAS Security Mode Command procedure | Mandatory | Supported | |
| 5.3.11 | UE Reachability procedures | Mandatory | Supported | |
| 5.3.11.1 | General | Mandatory | Supported | |
| 5.3.11.2 | UE Reachability Notification Request procedure | Mandatory | Supported | |
| 5.3.11.3 | UE Activity Notification procedure | Mandatory | Supported | |
| 5.4 | Session Management, QoS, and interaction with PCC functionality | Mandatory | Supported | |
| 5.4.1 | Dedicated bearer activation | Mandatory | Supported | |
| 5.4.2 | Bearer modification with bearer QoS update | Mandatory | Supported | |
| 5.4.2.1 | PDN GW initiated bearer modification with bearer QoS update | Mandatory | Supported | |
| 5.4.2.2 | HSS Initiated Subscribed QoS Modification | Mandatory | Supported | |
| 5.4.3 | PDN GW initiated bearer modification without bearer QoS update | Mandatory | Supported | |
| 5.4.4 | Bearer deactivation | Mandatory | Supported | |
| 5.4.4.1 | PDN GW initiated bearer deactivation | Mandatory | Supported | |
| 5.4.4.2 | MME Initiated Dedicated Bearer Deactivation | Mandatory | Supported | |
| 5.4.5 | UE requested bearer resource modification | Mandatory | Supported | |
| 5.4.7 | E-UTRAN initiated E-RAB modification procedure | Mandatory | Supported | |
| 5.4.8 | E-UTRAN initiated UE Context Modification procedure | Mandatory | Supported | |
| 5.5 | Handover | Mandatory | Supported | Assessed per sub-clause. |
| 5.5.1 | Intra-E-UTRAN handover | Mandatory | Supported | |
| 5.5.1.1 | X2-based handover | Mandatory | Supported | |
| 5.5.1.1.1 | General | Mandatory | Supported | |
| 5.5.1.1.2 | X2-based handover without Serving GW relocation | Mandatory | Supported | |
| 5.5.1.1.3 | X2-based handover with Serving GW relocation | Mandatory | Supported | |
| 5.5.1.2 | S1-based handover | Mandatory | Supported | |
| 5.5.1.2.1 | General | Mandatory | Supported | |
| 5.5.1.2.2 | S1-based handover, normal | Mandatory | Supported | |
| 5.5.1.2.3 | S1-based handover, Reject | Mandatory | Supported | |
| 5.5.1.2.4 | S1-based handover, Cancel | Mandatory | Supported | |
| 5.7.2 | MME | Mandatory | Supported | Classmark, Supported codecs, MS capability, Selected CN operator Id, ODB for PS parameters, RFSP, OMCI, restriction list, GRE key are not stored. For emergency services only emergency APN list and QoS parameters (QCI and ARP) are configured. |
| 5.7.6 | Handling of Wild Card APN | Mandatory | Supported | |
| 5.10.2 | UE requested PDN connectivity | Mandatory | Supported | |
| 5.10.3 | UE or MME requested PDN disconnection | Mandatory | Supported | |
| 5.12 | Warning message delivery | Mandatory | Supported | |
| 5.12.1 | General | Mandatory | Supported | |
| 5.12.2 | Void | Mandatory | Supported | |
| 5.12.3 | Void | Mandatory | Supported | |
| 5.16 | MME-initiated procedure on UE's CSG membership change | Mandatory | Not supported | A change of CSG membership does not trigger an MME-initiated procedure. |
| J.4 | Downlink data transfer | Mandatory | Supported |
Optional items⚓︎
The specification leaves these 112 items to the implementation; 19 are supported or partially supported. An item marked Not applicable belongs to an area the platform does not provide, named in the Support column. Expand for the full list.
112 optional items
| Ref. | Item | Support | Remarks |
|---|---|---|---|
| 4.3.2a | Support for Dual Connectivity | Supported | |
| 4.3.5.2 | Reachability Management for UE in ECM-IDLE state | Not supported | ISR is not supported |
| 4.3.7.1a | GTP-C signalling based Load and Overload Control | Not supported | |
| 4.3.7.1a.1 | GTP-C Load Control | Not supported | |
| 4.3.7.1a.2 | GTP-C Overload Control | Not supported | |
| 4.3.7.4 | MME control of overload | Not supported | |
| 4.3.7.4.1b | Throttling of NIDD Submit Requests | Not supported | |
| 4.3.12.4 | PDN GW selection function (3GPP accesses) for Emergency Services | Supported | PGW default selection rules still apply for the Emergency Attach. |
| 4.3.12.11 | Support of eCall Only Mode | Not supported | |
| 4.3.17.3 | Optimizing periodic TAU Signalling | Not supported | The extended periodic TAU timer is not configured or used; the periodic TAU timer IE is used. |
| 4.3.17.4 | UE configuration and usage of indicators | Supported | The low access priority indication is stored in the MME and sent in GTP messages on S11. |
| 4.3.17.7 | High latency communication | Not supported | |
| 4.3.17.8 | Support for Non-IP Data Delivery (NIDD) | Not supported | |
| 4.3.17.8.1 | General | Not supported | |
| 4.3.17.8.2 | ESM Procedures | Not supported | |
| 4.3.17.8.3 | Delivery mechanism | Not supported | |
| 4.3.17.9 | Service Gap Control | Not supported | |
| 4.3.21 | Core Network assisted eNodeB parameters tuning | Not supported | |
| 4.3.21.1 | CN Assistance Information | Not supported | |
| 4.3.21.2 | Void | Not supported | |
| 4.3.21.3 | Core Network Assistance Procedures | Not supported | |
| 4.3.22 | UE Power Saving Mode | Supported | |
| 4.3.23 | Access network selection and traffic steering based on RAN-assisted WLAN interworking | Not supported | |
| 4.3.23a | Access network selection and traffic steering based on RAN-Controlled WLAN interworking | Not supported | |
| 4.3.24 | RAN user plane congestion management function | Not supported | |
| 4.3.24.1 | General | Not supported | |
| 4.3.24.2 | RAN user plane congestion mitigation in the RAN | Not supported | |
| 4.3.24.3 | RAN user plane congestion mitigation in the CN | Not supported | |
| 4.3.25 | Dedicated Core Networks (DCNs) | Not supported | |
| 4.3.25.1 | General | Not supported | |
| 4.3.25.1a | UE assisted Dedicated Core Network selection | Not supported | |
| 4.3.25.2 | Considerations for Roaming | Not supported | |
| 4.3.25.3 | Considerations for Network Sharing | Not supported | |
| 4.3.26 | Support for Monitoring Events | Not supported | |
| 4.3.27 | Paging Enhancements | Not supported | |
| 4.3.27.1 | Paging for Enhanced Coverage | Not supported | |
| 4.3.27a | Restriction of use of Enhanced Coverage for voice centric UE | Not supported | |
| 4.3.27b | Enhanced Coverage for data centric UEs | Not supported | |
| 4.3.28 | Restriction of use of Enhanced Coverage | Not supported | |
| 4.3.29 | 3GPP PS Data Off | Not supported | |
| 4.8 | Compatibility Issues | Not supported | |
| 4.9 | Paging Policy Differentiation | Not supported | |
| 4.10 | Introduction of CIoT EPS Optimisations | Not supported | |
| 5.1 | Control and user planes | Supported | GTP & PMIP based S5/S8 supported. |
| 5.1.1.4 | SGSN - MME | Not supported | |
| 5.1.1.7 | MME - MME | Supported | |
| 5.1.1.12 | MME - CSS | Not supported | |
| 5.1.1.13 | MME - RCAF | Not supported | |
| 5.3.3.1A | Tracking Area Update procedure with Serving GW change and data forwarding | Not supported | |
| 5.3.3.3 | Routing Area Update with MME interaction and without S‑GW change | Not supported | |
| 5.3.3.4 | Void | Not supported | |
| 5.3.4.A | Connection Suspend procedure | Not supported | |
| 5.3.4B | Data Transport in Control Plane CIoT EPS optimisation | Not supported | |
| 5.3.4B.1 | General | Not supported | |
| 5.3.4B.2 | Mobile Originated Data Transport in Control Plane CIoT EPS optimisation with P-GW connectivity | Not supported | |
| 5.3.4B.3 | Mobile Terminated Data Transport in Control Plane CIoT EPS optimisation with P-GW connectivity | Not supported | |
| 5.3.5A | Connection Resume procedure | Not supported | |
| 5.3.7 | GUTI Reallocation procedure | Not supported | |
| 5.3.8.2.2 | UE-initiated Detach procedure for GERAN/UTRAN with ISR activated | Not supported | |
| 5.3.10.5 | ME identity check procedure | Not supported | |
| 5.3.12 | Update CSG Location Procedure | Not supported | |
| 5.3.13 | CSS subscription data management function procedure | Not supported | |
| 5.3.13.1 | General | Not supported | |
| 5.3.13.2 | Insert CSG Subscriber Data procedure | Not supported | |
| 5.3.14 | UE Radio Capability Match Request | Not supported | |
| 5.5.2 | Inter RAT handover | Not supported | |
| 5.5.2.0 | General | Not supported | |
| 5.5.2.1 | E-UTRAN to UTRAN Iu mode Inter RAT handover | Not supported | |
| 5.5.2.1.1 | General | Not supported | |
| 5.5.2.1.2 | Preparation phase | Not supported | |
| 5.5.2.1.3 | Execution phase | Not supported | |
| 5.5.2.1.4 | E-UTRAN to UTRAN Iu mode Inter RAT handover Reject | Not supported | |
| 5.5.2.2 | UTRAN Iu mode to E-UTRAN Inter RAT handover | Not supported | |
| 5.5.2.2.1 | General | Not supported | |
| 5.5.2.2.2 | Preparation phase | Not supported | |
| 5.5.2.2.3 | Execution phase | Not supported | |
| 5.5.2.2.4 | UTRAN Iu mode to E-UTRAN Inter RAT handover reject | Not supported | |
| 5.5.2.3 | E-UTRAN to GERAN A/Gb mode Inter RAT handover | Not supported | |
| 5.5.2.3.1 | General | Not supported | |
| 5.5.2.3.2 | Preparation phase | Not supported | |
| 5.5.2.3.3 | Execution phase | Not supported | |
| 5.5.2.3.4 | E-UTRAN to GERAN A/Gb mode Inter RAT handover reject | Not supported | |
| 5.5.2.4 | GERAN A/Gb mode to E-UTRAN Inter RAT handover | Not supported | |
| 5.5.2.4.1 | General | Not supported | |
| 5.5.2.4.2 | Preparation phase | Not supported | |
| 5.5.2.4.3 | Execution phase | Not supported | |
| 5.5.2.4.4 | GERAN A/Gb mode to E-UTRAN Inter RAT handover reject | Not supported | |
| 5.5.2.5 | Inter RAT handover Cancel | Not supported | |
| 5.5.2.5.1 | General | Not supported | |
| 5.5.2.5.2 | Source RAN to Target RAN Inter RAT handover Cancel | Not supported | |
| 5.6 | Network Assisted Cell Change | Not supported | |
| 5.6.1 | Architecture Principles for E-UTRAN to GERAN NACC | Not supported | |
| 5.7A.2 | Usage Data Reporting for Secondary RAT | Not supported | |
| 5.7A.3 | Secondary RAT Usage Data Reporting Procedure | Not supported | |
| 5.7A.4 | Secondary RAT Periodic Usage Data Reporting Procedure | Not supported | |
| 5.8 | MBMS | Not supported | |
| 5.9.1 | Location Reporting Procedure | Not supported | Current TAI + ECGI sent by eNodeB during Tracking Area Update is used by MME. |
| 5.10.4 | MME triggered Serving GW relocation | Not supported | |
| 5.11.1 | General | Supported | |
| 5.11.2 | UE Radio Capability Handling | Supported | |
| 5.11.3 | UE Core Network Capability | Supported | |
| 5.11.4 | UE Radio Capability for Paging Information | Not supported | |
| 5.13 | Discontinuous Reception and UE Specific DRX Parameter handling | Supported | DRX received in Attach request is sent towards UE in Attach Accept |
| 5.13a | Extended Idle mode Discontinuous Reception (DRX) | Supported | |
| 5.14 | Configuration Transfer procedure | Supported | |
| Annex D | Interoperation with Gn/Gp SGSNs | Supported | |
| D.1 | General Considerations | Supported | Only Gn interface (GTPv1) between MME and SGSN is supported |
| D.3.3 | MME to 3G SGSN combined hard handover and SRNS relocation procedure | Supported | |
| D.3.4 | 3G SGSN to MME combined hard handover and SRNS relocation procedure | Supported | |
| D.3.5 | Routing Area Update | Supported | |
| D.3.6 | Gn/Gp SGSN to MME Tracking Area Update | Supported | |
| Annex F | Dedicated bearer activation in combination with the default bearer activation at Attach and UE requested PDN connectivity procedures | Supported |
Assessed 2026-09-15 against TS 23.401 version 15.3.0.