The term 3GPP specification covers all GSM (including GPRS and EDGE), W-CDMA (including HSPA) and LTE (including LTE-Advanced) specifications. Along with that network side terminology such as UTRAN, IMS, FOMA (in Japan) are also covered by 3GPP specifications. Each 3gpp specifications have their unique numbers. Though these numbers look complicated and unnecessary, they have their own significance. Assigning a unique (more ..)
The S1-based handover procedure is used when the X2-based handover cannot be used. These are some examples when S1-based handover can be used. There is no X2 connectivity to the target eNodeB; by an error indication from the T-eNB after an unsuccessful X2-based handover; or by dynamic information learnt by the S-eNB using the STATUS TRANSFER procedure. The S-eNB initiates (more ..)
Intra-LTE (Intra-MME/SGW) handover using the X2 interface is used to handover a UE from a source eNodeB (S-eNB) to a target eNodeB (T-eNB) using the X2 interface when the Mobility Management Entity (MME) and Serving Gateway (SGW) are unchanged. This scenario is possible only when there is a direct connection exists between source eNodeB and target eNodeB with the X2 (more ..)
The Access Network Discovery and Selection Function (ANDSF) framework was introduced first in 3GPP Release 8 to standardize operator policy mechanism and since then it has evolved in the standard to provide further enhancements like flow mobility and more specific traffic identification. 3GPP Release 8 In Release 8, the ANDSF framework provides access network information; for instance, leveraging Wi-Fi Access (more ..)
Rollout of LTE over a legacy 2G/3G network for IMS-based VoIP service using Single Radio Voice Call Continuity (SRVCC). Single Radio Voice Call Continuity (SRVCC) can simplify rollout of a new LTE network consider an operator who has decided to move voice services to VoIP over IMS in conjunction with the deployment of an LTE access network. In the absence (more ..)
In the recent releases 3GPP has focused on enhancing the efficiency of high speed channels leading to significant network data capacity gain. It is also widely beneficial for operators to enhance the link efficiency of DCH for certain services leading to a further improvement in network data capacity. For example the DCH is still a very attractive option to serve (more ..)
In my last blog I wrote about how Scalable UMTS works and to make the things more clear here is a video demo from Qualcomm. The video demonstrate how scalable UMTS works and what one will expect as a end user from this new technology.