[LampSite Encyclopedias]-LampSite Reconfiguration Scenarios

The LampSite solution is useful for full indoor coverage. Generally, LampSite network capacity expansion and LampSite network reconstruction involve the following types of reconfiguration.

1. Universal Reconfiguration

Universal reconfiguration applies to reconfiguration of macro base stations and LampSite base stations.

In UMTS network mode, universal reconfiguration performed on the NodeB side includes reconfiguring an NodeB and reconfiguring the transmission mode, for example, adding a WBBP or UBBP to a 3900 series base station, replacing a baseband processing unit, changing the transmission mode over the Iub interface from ATM to IP, and changing the networking mode over the Iub interface from IP to transmission resource pool.

In LTE network mode, universal reconfiguration includes radio data reconfiguration, transport data reconfiguration, device data reconfiguration, and eNodeB configuration adjustment, for example, adding a cell, adjusting the security mode of transport networking, replacing the baseband processing units, and reconstructing an FDD eNodeB into an FDD+TDD eNodeB.

For details about LampSite universal reconfiguration, see eRAN (FDD) Reconfiguration Guide and RAN Reconfiguration Guide for macro base stations.

2. Dedicated Reconfiguration

LampSite dedicated reconfiguration applies only to LampSite base stations. For details, see Reconfigurations Dedicated to the LampSite Solution. Details about dedicated reconfiguration for UMTS networks will be added in the future.

Scenario 1: Adding a pRRU-Aggregation Cell

The LampSite solution ensures service quality for users in enclosed areas, such as office building, shopping malls, and areas with a large population. pRRUs are used to provide radio coverage for indoor areas. pRRUs are connected to the RHUB using Ethernet cables. The RHUBs are ten connected to the baseband processing units (referred to as XBBP in this scenario) in the BBU using optical fibers.

Scenario 2: Combining pRRU-Aggregation Cells

To improve signal quality in the coverage holes or weak-coverage areas, pRRUs can be added to provide radio coverage. If there are a small number of users on the network, multiple pRRU-aggregation cells can be combined as one pRRU-aggregation cell. This way, inter-cell interference is reduced, and baseband equipment resources are saved.

Scenario 3: Splitting a pRRU-Aggregation Cell

With the population increases in the office buildings, subways, residential communities, and shopping malls, traffic volume in the areas grows rapidly. To increase the traffic volume and number of users in this area, pRRU-aggregation cell splitting can be adopted to increase the number of carriers.

Scenario 4: Reconstructing pRRU-Aggregation Cells to a Pico SFN Cell

Inter-cell interference occurs if there are multiple pRRU-aggregation cells. If pico SFN cells are deployed, originally interfering signals from different cells turn into multi-path signals from one cell. Therefore, pico SFN cells increase the SINR and improve user experience at the cell edge.

Scenario 5: Adjusting the pRRU Transmit Power

If the indoor signal leakage and inter-cell interference are severe, the pRRU transmit power must be adjusted, thereby reducing indoor signal leakage and interface and improving flexibility of LampSite networking design and network optimization. For pRRUs installed at windows, signal leakage from inside to outside can be reduced. In the overlapping area between two cells, interference at the cell edge can be reduced.

3. Operation Process of Reconfiguration

What are the prerequisites for reconfiguration? Are the baseband processing unit and license required? How is base station data configured? What is the operation process of reconfiguration? Which hardware must be installed? How is the prepared data delivered to activate the base station? Answers to all the problems can be found in the following figure. For details about reconfiguration operations for the LampSite base station in each scenario, see Reconfigurations Dedicated to the LampSite Solution.

Reference Documents

This document provides only a brief introduction to LampSite reconfiguration. For details, see the documents listed in the following table.

For more information about the LampSite, visit LampSite Encylopedia

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