PPT ON TRANSMISSION SYSTEM AND ITS CONFIGURATION

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Transmission system and its Configuration  Presentation Transcript

1.Transmission system and its Configuration

2.Scope To give the Configuration idea about all Transmission Nodes in VNL System The information shared in this presentation is limited to configure the TU and RU with the basic settings to get the Transmission connectivity operational. To monitor Node’s statistics AssumptionsThe information contained in the slides are based on R1.0.1 There are changes expected with the change in TU and RU Software releases in future

3.Transmission system fundamentals Transmission is the path between two nodes of a network that a data communication follows There are major 3 types of Transmission media Microwave in GHz Frequency Fiber Optic Cable Cable Modem The purpose of Transmission System in VNL network is to provide radio network connectivity between BSC and remote BTSs VNL uses Wi-Fi connectivity for Microwave Transmission through 2.4 GHz & 5.8 GHz frequencies, as these are unlicensed band In VNL, we are using 2.4 GHz for T1 link which can Transmit approx 20 Km 5.8 GHz for T2 link which can Transmit approx 5 Km

4.Transmission Nodes VNL Transmission System covers following Nodes TU – Transmission Unit Responsible for TDM to IP conversion and vice-versa RU – Radio Unit Receives IP traffic through Ethernet cable from TU and transmits on Wi-Fi Transmission Media TDN – Transmission Distribution Node It’s a combination of 2 RU, used for Backhaul + Access Transmission connectivity 1st RU is for T1 Backhaul connectivity to next TDNs 2nd RU is for T2 Access connectivity to VBTSs RBTS is directly connected to TDN port

5.TU Configuration 1. TU card has 4 kind of IP addresses in Network Configuration Tab ISP IP Address – for Local login using Telnet through brctl addif bridge0 eth0 command ODU IP Address – for RU connectivity BSC IP – for BSC connectivity (only in BSC TU) TDMoIP – for Link connectivity between 2 different TU 2. To define a Link between 2 TUs in Link Configuration Tab Link number, Source Link ID & Destination Link ID should be SAME for each pair of Links Destination IP Address is the Far-end’s TU’s TDMoIP address One TS is for BIC & Three TS per TRx Clock Recovery should be Disable at BSC TU & Enable at BTS TU Advisable Packet size – 16 frames/Packet & Jitter/Buffer size – 16000 Micro Seconds 3. OMC IP should be mentioned in OMC Configuration Tab

6.RU Configuration

7.RU Configuration

8.Stats on RU/TDN RU/TDN can be monitored for various statistics with the help of Secured Shell (SSH) To monitor statistics in Windows Machine Start Putty application on your PC Enter the Accessible Transmission Node by it’s IP Use SSH as connection type (port no. 22) Enter in the Putty Window Enter Username : root Enter Password : public To monitor the RSSI (dBm) Level at particular RU/TDN wlanconfig ath0/ath1 list stat To monitor statistics in Linux Machine Open terminal Enter in the node with command ssh root@IP address Enter Password : public To monitor the RSSI (dBm) Level at particular RU/TDN wlanconfig ath0/ath1 list stat

9.Lab Setup Diagram E2E

10.Things to know All IP of TU should be on Different Subnet mask “DHCP” should be disabled (DHCP feature will be used when feature called discovery is provided with the SW build) BSC TU is accessed through BSC IP address (as ODU IP & BSC IP are connected through L2 Bridge) All BTS TU are accessed through ODU IP address Advance E1 Configuration in TU should be Set as “Tracking 1 – Holdover off” All IP addresses should be unique in the Network OMC port – 6790 TU product Id – 6002 RU product id – 6003 Any changes made in TU should be saved through Save Current Configuration Tab Any changes made in RU should be saved through “Commit” button through Configuration Tab There is No RU fitted inside the RBTS and hence No Antenna required for Wireless connectivity, RBTS shares its radio part with TDN BSC TU (with 2 E1) will have all connected BTS Links in Link Configuration Tab One E1 (31 TS) can be shared by different TU Links VBTS – 1 TS for BIC & 3 TS for TRx RBTS – 1 TS for BIC & 6 TS for TRx One E1 can be shared by either (7 VBTS) or (1 RBTS & 6 VBTS)