Troubleshooting: Fail to establish call
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Procedures: 1. Check whether the local cells are configured correctly ?The cell type should be consistent with the type of the corresponding sector. ?The baseband resources of the uplink/downlink resource group to which the cells belong should be enough to be allocated to the cells. ?The cell receiving antenna should be configured while the sectors are established, and the cell transmitting antenna should be configured when local cells are established. The configuration of the cell transmitting antenna should agree with the transmitting diversity mode in the sector configuration. The transmitting antenna must be configured ?The maximum transmit power of cells and uplink/downlink frequency should match the RF hardware attributes. You can run the DSP RRU MML command to view the RF hardware attributes.
2. Check whether the logical cells are configured correctly ?Check the following parameters: Cell scramble, cell frequency, maximum transmit power of cells, transmission parameters (including AAL2PATH, NCP/CCP, ALCAP, and the transmission parameters of the bottom layer in different transmission modes), and public channel. When configuring the frequencies of logical cells and local cells, you need to observe the following configuration principles: ?The maximum transmit power of logical cells should be equal to or lower than that of local cells; ?The transmission configuration at the RNC side should be consistent with that at the NodeB side, for example, the VPI and VCI of the AAL2PATH; ?The cell parameter configuration at the RNC side should be consistent with that at the NodeB side.
3. Query the failure reason by running the DSP UCELL command at the RNC side ?When the establishment of logical cells still fails even if the configurations are correct, provide a feedback of the related information to the R&D department for analysis.
4. Check whether the local cells associated with the logical cells are available ?If the local cells at the NodeB side are not available, the establishment of logical cells fails. |
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