lte rf operationa parameter

1. http://www.linkedin.com/pub/ray-khastur/36/965/b7a LTE - RF Operational Parameters

2. 4G LTE - RF Operational Parameters| Page 2 Cell Search Parameter

3. 4G LTE - RF Operational Parameters| Page 3 LTE Cell Search Procedure

12. 4G LTE - RF Operational Parameters| Page 12 Cell Search Summary

13. 4G LTE - RF Operational Parameters| Page 13 Hand Over in LTE Network

14. 4G LTE - RF Operational Parameters| Page 14 Overview of Handover While moving, a UE performs the handover procedure to change connection to the network. The following figure shows the schematic diagram. In the LTE system, the handover procedure is controlled by the network (eNodeB). Therefore, the eNodeB needs to monitor the quality of the radio environment where the UE is in. To do so, the eNodeB delivers a measurement control instructing the UE to send measurement reports when the conditions specified in the measurement control are met. Trigger: Currently, Huawei eNodeB uses event A3 to trigger an intra-frequency handover and events A2 and A4 to trigger an inter- frequency handover. Handover: The eNodeB delivers the handover command to the UE. Upon reception of the handover command, the UE disconnects from the source cell and is handed over to the target cell.

15. 4G LTE - RF Operational Parameters| Page 15 Overview of Handover Handovers in the LTE system Intra-RAT handovers Frequency relationship: Intra-frequency handovers Inter-frequency handovers Signaling bearers: Intra-eNodeB handovers Intra-MME X2-based handovers (in case the X2 interface is configured) Intra-MME S1-based handovers (in case the X2 interface is not configured) Inter-MME S1-based handovers with data forwarding over the X2 interface (in case the X2 interface is configured) Inter-MME S1-based handovers with data forwarding over the S1 interface (in case the X2 interface is not configured) Inter-RAT handovers

16. 4G LTE - RF Operational Parameters| Page 16 Event Definition

17. 4G LTE - RF Operational Parameters| Page 17 Handover Success Rate According to the signaling process in 3GPP TS 36.331, eNodeB statistics (1) Handover success rate = Number of handovers/Number of handover attempts x 100% (2) Number of handover attempts: indicates the number of eNodeB-transmitted RRCConnectionReconfiguration messages for handovers. (3) Number of handovers: indicates the number of eNodeB-received RRCConnectionReconfigurationComplete messages for handovers. Handover success rate The handover success rate is greater than 97% at the TD-LTE site in Norway. The handover success rate is 100% in the Huayang field in Chengdu.

18. 4G LTE - RF Operational Parameters| Page 18 Serving and Neighboring Cell Meas_RPRT S1AP_Handover_Required S1AP_Handover_CMD RRC_CONN_RECFG (HO_CMD) S1AP_eNB_Status_Transfer UE S_eNB T_eNB Core Network S1AP_Handover_Notify S1AP_UE_CONTEXT_REL_CMD RRC_CONN_RECFG_CMP (HO_CMP) RRC_CONN_RECFG RRC_CONN_RECFG_CMP UU_interface X2_interface S1_interface S1AP_Handover_REQ_ACK S1AP_MME_Status_Transfer S1AP_UE_CONTEXT_REL_CMP S1AP_Handover_Request

19. 4G LTE - RF Operational Parameters| Page 19 ANR vs UE capability : Inter-eNodeB 1. The source eNodeB delivers the intra-frequency measurement configuration to the UE, instructing the UE to measure neighboring cells that work on the frequencies specified in the measurement configuration. 2. The UE detects that the PCI of cell B meets the measurement requirements, and reports the PCI to the source eNodeB. 3. The source eNodeB checks whether its intra-RAT NCL includes the PCI of cell B. If so, the procedure ends. If not, the source eNodeB sends the measurement configuration to the UE, instructing the UE to read the ECGI, tracking area code (TAC), and PLMN ID list of cell B. 4. The source eNodeB allows the UE to read these parameters over the broadcast channel (BCH). 5. The UE reports the obtained parameter values to the source eNodeB. Notes: ANR features of an UE will effect the capability of the UE to read the ECGI, TAC and other information of the target cell. Thus, failure to do so the target cell information cant be read.

20. 4G LTE - RF Operational Parameters| Page 20 Due to the source cell and target cell are located under the same BBU board, thus target cell information can be search and obtain internally referring to the PCI. Therefore although UE doesnt support ANR features, it doesnt affect the reading of ECGI, TAC and other information of the target cell which required for the creation of NCL. 1. The source eNodeB delivers the intra-frequency measurement configuration to the UE, instructing the UE to measure neighboring cells that work on the frequencies specified in the measurement configuration. 2. The UE detects that the PCI of target cell (Cell A) meets the measurement requirements, and reports the PCI to the source cell (Cell B). ANR vs UE capability : Intra-eNodeB

21. 4G LTE - RF Operational Parameters| Page 21 Power Control Overview

22. 4G LTE - RF Operational Parameters| Page 22 Power Control Overview

lte rf operationa parameter

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