Parameter Name |
Channel Type |
|---|---|
Description |
This parameter specifies the channel type and its function of all TRXs in a cell. Combined BCCH + 7TCH Main BCCH + SDCCH/8 + 6TCH Main BCCH + 2SDCCH/8 + 5TCH Main BCCH + SDCCH/8 + extended BCCH (BCH) + 5TCH Main BCCH + SDCCH/8 + extended BCCH (BCH) + TCH + extended BCCH (BCH) + 3TCH The BCCH configuration in the cell should be based on the number of channels and paging processing capability of the location area. The main BCCH and combined BCCH are configured on timeslot 0. The extended BCCH can only be configured on timeslot 2, 4, and 6. If the extended BCCH is configured, the parameters related to the CCCH in the system information should be configured correspondingly. For example, If an extended BCCH is configured on timeslot 2, then two CCCHs in non-combined configuration should be specified in the system information. To enable the cell broadcast service in a cell, you need to configure a CBCH channel for the cells supporting cell broadcast service in the radio channel configuration. If the combination of SDCCH/8+CBCH is used, the channel type should be SDCCH+CBCH. You can change a TCH into SDCCH+CBCH. Alternatively, you can change an existing SDCCH into SDCCH+CBCH. If the SDCCH/4 is used for the control channel, the channel type can be set to BCCH+CBCH. The performance of the cell broadcast service in SDCCH/8 is the same as that in SDCCH/4. The specific settings should be based on the network planning requirements of all cells. The half-rate networking is a special networking mode. Therefore, its data configuration is different from that in other networking modes. In the half-rate networking mode, the RSL signaling throughput of each TRX increases. The maximum multiplexing ratio of the LAPD signaling links on the Abis interface is 2:1. An E1 link supports a maximum of 13 TRXs. If the LAPD signaling links are not multiplexed, an E1 link supports less TRXs. |
GUI Value Range |
[TCH Full Rate,TCH Half Rate(Reserved),TCH Half Rate,SDCCH8,Main BCCH,Combined BCCH,BCH,BCCH+CBCH,SDCCH+CBCH,PBCCH+PDTCH,PCCCH+PDTCH,PDTCH,Dynamic PDCH] |
Default Value |
None |
Unit |
None |
Step |
- |
Modification Rules |
None |
Configuration Policy |
It is recommended that this parameter be set as follows: One or two TRXs are configured with one SDCCH/8 channel. Three or four TRXs are configured with two SDCCH/8 channels. Five or six TRXs are configured with three SDCCH/8 channels. In addition, the SDCCH dynamic allocation function should be enabled and work properly. If need to configure half-rate channels, set Channel Type to TCH Half Rate. When configuring several SDCCHs, you should note that all TRXs in a cell should averagely allocate the SDCCH. If a main BCCH is configured on the TRX, it is recommended not to configure two or more than two SDCCHs. The TRX without configuring main BCCH can be configured with up to two SDCCHs. In the terrestrial transmission of 16 kbit/s, a TRX can be configured with one SDCCH if no pre-processed measurement report is not opened. The TRX carrying the main BCCH is not configured with the SDCCH for paging. |
Recommended Value |
None |
Parameter Relationship |
None |
BSC Feature |
Channel Management |
Parameter Class |
Parameters About Radio Resources |
Caution |
None |