UECapabilityEnquiry
The UECapabilityEnquiry message is used to request the transfer of UE radio access capabilities for E-UTRA as well as for other RATs.
Signalling radio bearer: SRB1
RLC-SAP: AM
Logical channel: DCCH
Direction: E-UTRAN to UE
IE’s in UECapabilityEnquiry Message:
UECapabilityEnquiry-r8-IEs ::= SEQUENCE{
{
ue-CapabilityRequest
nonCriticalExtension
}
ue-CapabilityRequest: List of the RATs for which the UE is requested to transfer the UE radio access capabilities i.e. E-UTRA, UTRA, GERAN-CS, GERAN-PS, CDMA2000.
Reception of the UECapabilityEnquiry by the UE
The UE shall:
1> set the contents of UECapabilityInformation message as follows:
2> if the ue-CapabilityRequest includes eutra:
3> include the UE-EUTRA-Capability within a ue-CapabilityRAT-Container and with the rat-Type set to eutra; 3> if the UE supports FDD and TDD:
4> set all fields of UECapabilityInformation, except field fdd-Add-UE-EUTRA-Capabilities and tdd-Add- UE-EUTRA-Capabilities, to include the values applicable for both FDD and TDD (i.e. functionality supported by both modes);
UECapabilityInformation
The UECapabilityInformation message is used to transfer of UE radio access capabilities requested by the E-UTRAN.
Signalling radio bearer: SRB1
RLC-SAP: AM
Logical channel: DCCH
Direction: UE to E-UTRAN
IE’s in UECapabilityInformation Message:
UECapabilityInformation-r8-IEs ::= SEQUENCE{
ue-CapabilityRAT-ContainerList
nonCriticalExtension
}
Reference: 3GPP TS 36.331