We had discussed the need and challenges for voice over LTE .. Now lets understand it by digging deeper..
Although all the operators will be moving to 3GPP eventually. The underlying 3G technologies are different. Some operators have CDMA, some have GSM and hence it is going to be a difficult but necessary transition. Theoretically most of the solutions look very very attractive.. Its when the real situations come, the challenges are visible. There are two angles to the whole LTE deployment strategy. CDMA angle and GSM/WCDMA angle.
GSM/WCDMA :
Initially the operators will have to support circuit switched fall back. In the later stages, when LTE coverage is obtained throughout the region, Single radio voice call continuity needs to be achieved to reach the end result of all IP networks !
CDMA :
I always feel that GSM is a very very complex system and difficult to understand. :(
These operators need to support Simultaneous Voice and LTE (SV-LTE) or Simultaneous Voice and Data (SV-DO) or evolved high rate packet data (eHRPD) and achieve the end goal of all IP networks controlled by IMS.
Although all the operators will be moving to 3GPP eventually. The underlying 3G technologies are different. Some operators have CDMA, some have GSM and hence it is going to be a difficult but necessary transition. Theoretically most of the solutions look very very attractive.. Its when the real situations come, the challenges are visible. There are two angles to the whole LTE deployment strategy. CDMA angle and GSM/WCDMA angle.
GSM/WCDMA :
Initially the operators will have to support circuit switched fall back. In the later stages, when LTE coverage is obtained throughout the region, Single radio voice call continuity needs to be achieved to reach the end result of all IP networks !
CDMA :
I always feel that GSM is a very very complex system and difficult to understand. :(
These operators need to support Simultaneous Voice and LTE (SV-LTE) or Simultaneous Voice and Data (SV-DO) or evolved high rate packet data (eHRPD) and achieve the end goal of all IP networks controlled by IMS.
0 comments :
Post a Comment