UMTS: Alive and Well - 4G Americas

Table C.8. DwPTS/GP/UpPTS Length (OFDM Symbols).FormatNormal CPExtended CPDwPTS GP UpPTS DwPTS GP UpPTS0 3 103 81 9 4 8 32 10 3 1 9 213 11 2 10 14 12 1 3 75 3 98 2 26 9 3 9 127 10 2 - - -8 11 1 - - -C.4 OTHER RELEASE 8 ENHANCEMENTSThis section discusses other Rel-8 enhancements including Common IMS, Multimedia Priority Service,IMS Service Interaction, VCC Enhancements and enhancements in the area of UICC/USIM.C.4.1COMMON IMSCooperation with groups specifying IMS for wireline applications (e.g. ETSI, TISPAN and Cablelabs) inRel-7 led to non-cellular access aspects being documented in 3GPP’s specifications, and in Rel-8,3GPP’s Organizational Partners (OPs) have decided that 3GPP should be the focus for all IMSspecifications under its responsibility.The “Common IMS” work is an agreement between the 3GPP OPs to migrate work on the IMS and someassociated aspects to 3GPP for all access technologies. This will simplify the deployment of Fixed MobileConvergence (FMC) solutions, minimize the risk of divergent standardization and make thestandardization process more efficient.Rel-8 is the first release directly impacted by Common IMS, and agreements have been made with ETSI,TISPAN and 3GPP2 whereby 3GPP includes provisions of a number of specifications in their owndocuments. Not all IMS work has been transferred in these cases, for example 3GPP2 retains control ofthe VCC specifications. Future 3GPP2 work will, therefore, refer to 3GPP specifications where thistransfer has occurred. Standard Development Organizations (SDOs) outside the 3GPP OPs are, ofcourse, not bound by the Common IMS agreement. 3GPP will continue to work with bodies like ITU-T,3GPP2 and Cablelabs on the use of IMS specifications in their areas.A number of new features were introduced into IMS as a result of this harmonization exercise:• An existing set of completed ETSI TISPAN supplementary services (e.g. conference, calldiversion)• Call completion services• Communication waiting servicewww.3GAmericas.org February 2010 Page 198