9.2.3 Handover Restriction List

36.4233GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17TSX2 Application Protocol (X2AP)

This IE defines roaming or access restrictions for subsequent mobility action for which the eNB provides information about the target of the mobility action towards the UE, e.g., handover and CCO, or for SCG selection during dual connectivity operation.

IE/Group Name

Presence

Range

IE type and reference

Semantics description

Criticality

Assigned Criticality

Serving PLMN

M

PLMN Identity

9.2.4

Equivalent PLMNs

0..<maxnoofEPLMNs>

Allowed PLMNs in addition to Serving PLMN.

This list corresponds to the list of "equivalent PLMNs list" as defined in TS 24.301 [14].

This list is part of the roaming restriction information. Roaming restrictions apply to PLMNs other than the serving PLMN and Equivalent PLMNs.

>PLMN Identity

M

9.2.4

Forbidden TAs

0..<maxnoofEPLMNsPlusOne>

intra E-UTRAN roaming restrictions

>PLMN Identity

M

9.2.4

The PLMN of forbidden TACs

>Forbidden TACs

1..<maxnoofForbTACs>

>>TAC

M

OCTET STRING(2)

The forbidden TAC

Forbidden LAs

0..<maxnoofEPLMNsPlusOne>

inter-3GPP RAT roaming restrictions

>PLMN Identity

M

9.2.4

>Forbidden LACs

1..<maxnoofForbLACs>

>>LAC

M

OCTET STRING(2)

Forbidden inter RATs

O

ENUMERATED(ALL, GERAN, UTRAN, CDMA2000, …,GERAN and UTRAN, CDMA2000 and UTRAN)

inter-3GPP and 3GPP2 RAT access restrictions. "ALL" means that all RATs mentioned in the enumeration of this IE are restricted.

NR restriction in EPS as secondary RAT

O

ENUMERATED(NRrestrictedinEPSasSecondaryRAT, …)

Restriction to use NR when the NR is used as secondary RAT in EN-DC.

YES

ignore

Core Network Type Restrictions

0..<maxnoofEPLMNsPlusOne>

Includes any of the Serving PLMN or any PLMN of the Equivalent PLMNs listed in the Mobility Restriction List IE for which core network type restriction applies as specified in TS 23.501 [38].

YES

ignore

>PLMN Identity

M

9.2.4

>Core Network Type

M

ENUMERATED (5GCForbidden, …, EPCForbidden)

The indication indicates whether the UE is restricted to connect to 5GC or to EPC for this PLMN.

NR Restriction in 5GS

O

ENUMERATED(NRrestrictedin5GS, …)

Restriction to use NR when the NR connects to 5GS.

YES

ignore

Last NG-RAN PLMN Identity

O

9.2.4

Indicates the NG-RAN PLMN from where the UE formerly handed over to EPS and which is preferred in case of subsequent mobility to 5GS.

YES

ignore

Unlicensed Spectrum Restriction

O

ENUMERATED(UnlicensedRestricted, …)

Restriction to use unlicensed spectrum in the form of LAA or LWA/LWIP or NR-U as described in TS 23.401 [11].

YES

ignore

RAT Restrictions

0..<maxnoofEPLMNsPlusOne>

This IE contains RAT restriction related information as specified in TS 23.401 [11].

>PLMN Identity

M

9.2.4

>RAT Restriction Information

M

BIT STRING {

LEO (0),

MEO (1),

GEO (2),

OTHERSAT (3)}

(SIZE(8, …))

Each position in the bitmap represents a RAT.

If a bit is set to "1", the respective RAT is restricted for the UE.

If a bit is set to "0", the respective RAT is not restricted for the UE.

Bits 4-7 reserved for future use.

Range bound

Explanation

maxnoofEPLMNs

Maximum no. of equivalent PLMN Ids. Value is 15.

maxnoofEPLMNsPlusOne

Maximum no. of equivalent PLMN Ids plus one. Value is 16.

maxnoofForbTACs

Maximum no. of forbidden Tracking Area Codes. Value is 4096.

maxnoofForbLACs

Maximum no. of forbidden Location Area Codes. Value is 4096.