How does paging in LTE work? What are the different situations when LTE UE receives paging from network? Paging in LTE network is used to inform and notify UE about various events. The propose of paging procedure is: To transmit paging information to a UE in RRC_IDLE state. To inform UEs in RRC_IDLE and UEs in RRC_CONNECTED state about a (more ..)
How LTE MAC header is encoded? What are different header elements in LTE MAC header? LTE MAC PDU is a bit string but octet aligned (i.e multiple of 8 bits). A MAC PDU header consists of one or more subheaders. Each subheader corresponds to either a MAC SDU, MAC control element or padding. MAC PDU header can have these six (more ..)
What is cell selection? What is the criteria for cell selection? After selecting a PLMN UE need to select a cell to obtain normal or emergency service. Cell selection procedure is divided into two types Initial cell selection : When UE does not have any prior knowledge about RF channels in UTRA band or Stored information cell selection: This procedure (more ..)
What is a reserved cell? How to check if 3GPP cell is reserved? A cell is reserved if it is indicated as reserved in RRC System Information Block type 3. Following exceptions to these definitions are applicable for UEs: Camped on a cell that belongs to a LA that is forbidden for regional provision of service, and during emergency calls. (more ..)
What is a suitable cell? What are the minimum criteria for 3G suitable cells? A suitable cell in UTRAN system is a cell on which UE can camp on and obtain normal services like voice call and packet call. If UE can not get normal services from the particular cell after camping then it is not considered as a suitable (more ..)
What makes a cell acceptable in 3G UMTS system? In acceptable cell UE can camp and make emergency call and receive ETWS notifications if it is supported. An acceptable cell should fulfill the following requirements to make emergency call and receive ETWS primary notifications with or without security support. An 3GPP acceptable cell should not be a barred cell All (more ..)
What is 3GPP? Why 3GPP Exists? 3GPP stands for 3rd generation partnership project. 3GPP combines six telecommunication standardardization groups (ARIB, ATIS, CCSA, ETSI, TTA, TTC) to produce specifications and reports for different 3GPP technologies like 3G (UMTS), HSPA, LTE, LTE Advanced, etc. 3GPP has for technical specification groups. Those are Radio Access Networks (RAN), Service & Systems Aspects (SA), Core (more ..)