22.0873GPPService descriptionStage 1TSUser-to-User Signalling (UUS)
The UUS supplementary service shall be provided to the served subscriber after pre-arrangement with the service provider. The remote party needs no subscription of the UUS supplementary service.
NOTE: The remote party is able to send UUI without provision of the UUS supplementary service when the service is activated against her by the served subscriber.
As a service provider option, one or any combination of the following shall be provided:
– service 1 (implicitly requested andexplicitly requested);
– service 2;
– service 3.
The UUS supplementary service and several UUS services shall be withdrawn by the service provider upon the subscriber’s request or for service providers reasons.
The supplementary service UUS shall be withdrawn if all UUS services provided to the served subscriber are withdrawn.
5.3 Registration and Erasure
5.4 Activation and Deactivation
The UUS supplementary service shall be activated by the service provider as a result of provision and deactivated as a result of withdrawal.
The UUS supplementary service is invoked if at least one UUS service is activated by the served subscriber.
5.7 Handling of UUS services
UUS service is activated when:
– activation is implicitly requested (for service 1); or
– activation is explicitly requested (for service 1, service 2 and service 3) and is accepted by the remote party.
Depending on the served subscriber subscription to the UUS supplementary service and the provision of the UUS services by the service provider, service 1 implicit, service 1 explicit, service 2 and service 3 can be activated individually or in combination. Service 1 implicit and service 1 explicit cannot be simultaneously active.
Once an UUS service is activated the network shall accept UUI from either subscriber in the call, according to the service that has been activated.
The network shall confirm the explicit activation of a UUS service (service 1, 2 and 3) to the served subscriber. This confirmation shall be preceded by an end-to-end check by the network for service availability.
The network shall interrogate the remote party and check for the availability of the UUS service on the remote party’s side. The mobile station shall confirm the requested services if it is able to handle the UUS service. The remote party shall not have the possibility to confirm or reject the request for the UUS service on a per call basis. No response from the remote party shall be taken by the network as a rejection of the request for the UUS service.
NOTE: Nevertheless the remote party may restrict the use of a UUS service by pre-programming of the mobile station to reject incoming UUS activation requests.
The network shall explicitly indicate to the calling mobile subscriber whether or not the requested service has been successfully activated.
18.104.22.168 Service 1
UUS service 1 shall be activated by the calling mobile subscriber when originating a call if UUI transfer is desired in either direction.
Service 1 is automatically deactivated when the call is terminated.
Service 1 can be activated by means of an implicit activation request or an explicit activation request.
Service 1 is implicitly activated when UUI is included when originating a call.
When service 1 is implicitly activated, service 1 is active for the call, i.e. the remote party is not required to send a response to the implicit activation request. However, the remote party can include UUI in the call response.
The UUS service 1 shall be activated explicitly by using of the procedure defined in TS 22.030 .
The served mobile subscriber shall be given an explicit response (acceptance or rejection) to an explicit activation request. An explicit activation request can include UUI.
When service 1 is explicitly requested, the remote party can include UUI when accepting the activation request for the UUS supplementary service.
22.214.171.124 Service 2
The UUS service 2 shall be activated by using of the procedure defined in TS 22.030 .
Service 2 shall be activated by the served subscriber when originating a call, if UUI transfer is desired in either direction.
Service 2 shall be explicitly requested. The served mobile subscriber shall be given an explicit response (acceptance or rejection) to an explicit activation request.
Service 2 is automatically deactivated when the called subscriber is no longer being informed of the call, i.e. if the call is established or released.
126.96.36.199 Service 3
The served subscriber can explicit request the activation of service 3 when a call is originated or after the connection has been established by using the procedure defined in TS 22.030 . The request for the UUS service 3 shall be accepted from the remote party in order to activate the UUS supplementary service. The served user shall be given an explicit response (acceptance or rejection) to the explicit activation request.
Service 3 is automatically deactivated when the call is no longer established.
188.8.131.52 "UUS required" request
When a call is originated, the calling subscriber can specify whether the requested UUS service(s) is (are) required for the call, i.e. if the call should be completed or not if UUI cannot be passed. If the "UUI-required" indication is given by the subscriber, the call shall not be completed if UUI cannot be passed to the called subscriber. If the "UUI-not-required" indication is given by the subscriber, the call will be completed even if UUI cannot be passed. If service 1 is implicitly requested or if service 3 is requested during the call, it cannot be requested as "UUI-required".
5.7.2 Invocation and operation
If activated by the served subscriber a UUS service shall be invoked when UUI is sent by either subscriber to the network.
When a subscriber sends UUI the network shall not confirm its delivery to the subscriber.
For service 2 and 3, when sending a UUI message, the subscriber can indicate that the subscriber will send further UUI associated with this UUI message. This indication shall be given to the receiving subscriber.
When sending a UUI message, the subscriber may indicate the use of particular user protocol associated with the UUI message. This indication shall be given to the receiving subscriber. The identification of, and the use of, user protocols is outside of this standard.
184.108.40.206 Service 1
A PLMN subscriber can transfer UUI when originating a call. When service 1 has been activated, either subscriber can include UUI when accepting, rejecting, or terminating a call.
Note: It is possible for a calling subscriber to invoke the UUS service 1 with a call set-up and terminate the call before the connection is established.
220.127.116.11 Service 2
Any time between activation of service 2 and connection is established, either subscriber can transfer up to 2 UUI messages in each direction to the other subscriber involved in the call.
18.104.22.168 Service 3
After service 3 has been activated, either subscriber can transfer UUI to the other subscriber on the call after the connection has been established.
Note: The amount of UUI messages that can be transferred with service 3 shall be defined.
22.214.171.124 Charging requirements
The served subscriber shall be charged according to the number of UUI messages transferred in either direction. When charging for UUI the destination (e.g. international calls, diverted calls) of the related call shall not be considered.
It shall be possible to charge for the invocation of the UUS supplementary service even if there are no other call charges.