7 Interactions with other supplementary services
22.0873GPPService descriptionStage 1TSUser-to-User Signalling (UUS)
7.1 Call forwarding unconditional
No impact
NOTE: UUI or an activation request for a UUS service will be forwarded with the call even in the case the forwarding subscriber has no subscription of the relevant UUS service.
7.2 Call forwarding on mobile subscriber busy
If call forwarding on mobile subscriber busy is invoked as a result of a network determined user busy condition (NDUB) of the called subscriber, any UUI and UUS request accompanies the call set-up request shall be forwarded with the call
If call forwarding on mobile subscriber busy is invoked as a result of an user determined user busy condition (UDUB) the following cases shall be distinguished:
– If the UDUB condition is met before alerting any UUI and UUS request accompanies the call set-up request shall be forwarded with the call.
– If the UDUB condition is met after alerting the interactions as defined for call forwarding on no reply shall apply.
UUI included in a UDUB request by the forwarding subscriber shall be ignored by the network.
NOTE: UUI or an activation request for a UUS service will be forwarded with the call even in the case the forwarding subscriber has no subscription of the relevant UUS service.
7.3 Call forwarding on no reply
Service 1:
If UUS service 1 is implicitly requested to the forwarding subscriber the UUI shall be transferred to the forwarded-to party after the invocation of CFNRy.
If UUS service 1 is explicitly requested with the option "UUS required“ to a called subscriber who has CFNRy active and operative and the no-reply condition timer expires, the call shall be released.
If UUS service 1 is explicitly requested with the option "UUS not required“ to a called subscriber who has CFNRy active and operative, CFNRy shall be invoked. If the called subscriber has confirmed the UUS service 1 request prior to the invocation of CFNRy, the UUI and the UUS request shall be transferred to the forwarded-to party. Otherwise the UUI and the UUS request shall not be forwarded with the call.
Service 2:
If UUS service 2 is requested with the option "UUS not required“ to a called subscriber who has CFNRy active and operative, CFNRy shall be invoked but no UUS activation request will be given to the forwarded-to subscriber.
If UUS service 2 is requested with the option "UUS required“ to a called subscriber who has CFNRy active and operative, CFNRy shall not be invoked.
Service 3:
Any activation request for UUS service 3 that accompanies the call set-up request shall be forwarded with the call.
NOTE: UUI or an activation request for a UUS service will be forwarded with the call even in the case the forwarding subscriber has no subscription of the relevant UUS service.
7.4 Call forwarding on mobile subscriber not reachable
No impact
NOTE: UUI or an activation request for a UUS service will be forwarded with the call even in the case the forwarding subscriber has no subscription of the relevant UUS service.
7.5 Call waiting
UUI for the operation of UUS service 1 included in the call request shall be delivered with the call waiting indication to the called subscriber.
There are no interactions with service 2 and service 3.
7.6 Call hold
A subscriber who has invoked the Call Hold supplementary service may send or receive UUI to/from both the active and the held party. If the served subscriber has an active and a held call the mobile station shall indicate which party has sent a received UUI message.
7.7 Completion of calls to busy subscribers
Requests for the activation of a UUS service contained in the original call request shall be stored with the request for the invocation of the CCBS supplementary service.
The network shall also store any UUI containing in the original call request and use this stored UUI in the CCBS call.
7.8 Explicit call transfer
When calls are transferred as a result of invocation of the explicit call transfer supplementary service, UUS services activated on either of the calls prior to the invocation of the explicit call transfer supplementary service shall be automatically deactivated by the network.
No specific notification shall be sent to the involved subscribers when the UUS services are no longer activated.
The subscribers involved in the transferred call may request the activation of service 3 again, if required.
7.9 Multi party service
During a MPTY the MPTY-Manager can send and receive UUI to/from each remote party separately. The mobile station of the multi party manager shall indicate from which remote party a received UUI message was sent.
UUI shall not be transferred between remote parties.
7.10 Advice of charge
No impact.
NOTE: The Advice of Charge services may not provide any information concerning charges for the use of the UUS supplementary service.
7.11 Barring of outgoing calls
no impact
7.12 Barring of outgoing international calls
no impact
7.13 Barring of outgoing international calls except those directed to the home PLMN country
no impact
7.14 Barring of incoming calls
no impact.
7.15 Barring of incoming calls when roaming outside the home PLMN country
no impact.
7.16 Call Deflection
If Call Deflection is invoked before alerting the same interactions as for Call forwarding on mobile subscriber busy shall apply.
If Call Deflection is invoked after alerting the same interactions as for Call forwarding on no reply shall apply.