It is also the The timing unit board TUB provides the timing reference for the system. It has hardware modules that provide the links ISL. It provides connectivity for internal and external user plane traffic with redundancy between device boards in the same or different subracks.
Variants 74 and 75 have Ethernet connections to the backplane for use in a High Capacity Subrack. The unit provides primary memory RAM , disk memory flash disk and a flash memory. The MS and ES can each house up to 28 boards. The EPB is equipped with Ethernet and asynchronous serial interfaces accessible from the board front panel.
The EPB contains a flash disk drive. They are as follows: Switch. The unit also has a device processor that terminates 10 Gbit Ethernet traffic on Ethernet connections to the backplane. The unit is equipped with Ethernet and serial front ports for management purposes. The unit provides primary memory RAM , disk memory flash disk and a flash memory on the main processor and separate primary memory for the device processor. To support multi technology Ericsson is introducing a new base station family known as the RBS RBS The FCU is a single unit that controls and supervises up to four internal fans.
FU is Filter Unit. A and Ant. Downlink TX signals are filtered in the FU before transfer to the antenna and uplink RX signals from the antenna are filtered and amplified before transfer to the RU. Communication includes control data, clock signals and gamma data. The RU receives digital data from the Baseband, converts the data into analog radio signals, amplifies these and feeds them to the Filter Unit FU. The RU also receives radio signals from the FU, converts these signals into digital data, and sends them to Baseband.
The RAX board is used for uplink baseband processing. The unit has the following functions: Deserializing Demodulation Decoding. TX Transmitter TX board.
The TX board is used for downlink baseband processing such as transport channel handling, encoding, modulation, spreading and channel combining. The unit has the following functions: Soft and softer handover Transport channel handling Encoding Modulation and spreading Physical channel combining. TX boards are available with different CE capacities. RBS Main-Remote: the benefits 1. No More Feeder Loss.
Easier antenna placement: With the Main-Remote concept, it becomes easier to place antennas at far greater distances from each other, and from the main RBS cabinet Main Unit. RBS Overview. RBS HW. Remote Radio Unit. These can be configured as 6x1 and RAX boards. One of the RAXB positions can also be utilized by an additional transmission board e.
Set up BBU on cabinets. Mount cabinets on specific location based from Floor plans. Power up equipment and perform commissioning. Coordinate with NIC to complete Integration and troubleshoot when necessary. Alarm Clearing and Troubleshooting. Atlanta, GA. Alltel Comms. American Samoa. Manual Integration if OSS not ready. Deblock S1 interface and cells, coordinate with NIC and troubleshoot when necessary.
Alarm verification and testing. Data Packet Call testing on all sectors. Obviously, this facilitates site acquisition and planning. Operators have come to expect that the functionality of installed equipment can be upgraded in harmony with the rest of the network. In short, the RBS must represent a secure investment. It must be reliable, expandable and compatible with future investments. Certainly these choices called for a fundamentally larger design effort leading up to the first commercial release of the 3G RAN products, but because each subsequent 3G node from Ericsson derives from the same platform, operators know they can evolve their nodes.
It already covers three frequency bands, and at least two more frequency bands are planned for the coming year. This was the same year that products based on RBS R1 appeared in the market. The objective of the studies was to incorporate 3G RBS design experience and experience gained from developing and adapting GSM to new market requirements. An important conclusion of extensive life-cycle assessments LCA conducted since the mids is that the most significant impact of telecommunications systems on the environment is linked to energy consumption from operations.
Furthermore, in this context, radio base stations are the single largest consumers of energy. The RBS R3 development successfully transitioned to series production in the first quarter of Table 1 contains a brief summary of the RBS R3 design enhancements. Flexible configurations and compatibility The market has been very clear in spelling out its demands for one-cabinet solutions.
Many operators, for example, want selfcontained indoor cabinet solutions with integrated power. Certainly, a one-cabinet dual-band solution offers several advantages: resource pooling, small footprint, low power consumption, simpler expansion and reduced maintenance.
Ericsson designed the new RBS R3 with these attributes in mind. It supports all planned configurations in one cabinet, accommodating up to four carriers per sector, sixsector or dual-band configurations. The entire radio network can thus evolve very smoothly in terms of transport for example, IP transmission and radio functionality such as HSDPA services.
To operators, this means larger configurations in one cabinet, significantly lower power consumption and improved Ericsson Review No. In fact, Ericsson exceeded this goal to improve individual carrier capacity. Greater output power is always beneficial for downlink coverage and capacity. The task of doubling available output power per cabinet without increasing cabinet size entailed re-examining the entire design: power supply, cooling, integration of subsystems, internal jumpers, filter design, and power amplifiers.
Radio architectures with the greatest potential in terms of efficiency, flexibility and capacity per volume make use of radio units RU and filter units FU , where a radio unit is a complete transceiver and MCPA Figure 3.
The filter unit is composed of the front end: transmitter and receiver cavity filters, low-noise amplifiers, logic and internal bias-Tee for communication, power feed over feeder to ASCs and remote electrical antenna tilt RET , and lightning protection. This simple and elegant architecture has few building blocks and few interfaces. Furthermore, it accommodates ongoing technical evolution relative to power amplifier design, because the digital and analog parts of the transceiver are integrated with the power amplifier.
The improved power consumption efficiency and maximum output power capability are good examples of the achievements of the new design. The maximum output power is more than W for an R3 cabinet at top of cabinet as compared to approximately W for the R2 cabinet. This large increase in output power capability facilitates large single and dual-band configurations without compromising downlink cell capacity.
Baseband Ericsson designed the RBS baseband architecture to ensure smooth and long74 term evolution of functionality and capacity. One important feature of the baseband architecture is the separation of the uplink and downlink into different resource pools.
A drawback of this design choice is the need for additional inter-board interfaces and thus greater need for architectural system planning, to ensure future compatibility. But once these hurdles had been cleared the benefits were quite substantial.
For instance, one can optimize the uplink and downlink independently using different technologies for each. One may also dimension node capacity according to traffic needs, which improves cost-effectiveness. This benefit will be especially pronounced as data traffic volumes increase, because the downlink typically carries six times more data traffic than the uplink. The design also doubles pooling efficiency by introducing larger resource trunks, and giving the system full freedom to use all the available resources on all individual uplink and downlink boards — that is, there are no restrictions put on the allocation of necessary downlink and uplink radio link resources as would have been the case had the resources been on the same board.
Key characteristics of the baseband architecture, to accommodate new functionality and greater capacity throughout the lifetime of 3G, are efficient resource utilization and high capacity. Although the channel element CE is a resource equivalent not standardized by 3GPP and thus defined differently by different vendors the definition differs in how many CE are required for a given service, whether CE resources are required for common signaling, compressed mode measurements, and so on , it represents a simple and intuitive measurement of baseband capacity.
The RBS R3 architecture can boast the largest baseband capacity in the industry in a single, standard-sized cabinet: CE in both the uplink and downlink.
Given future emphasis on downlink data services, the channel element data efficiency is particularly high in the downlink. Ericsson has employed higher-order integration to obtain very high baseband capacity.
By pooling the HSDPA downlink resources with R99 downlink resources it is possible to optimize the scheduler in terms of available downlink power and traffic. A fast scheduler has a positive impact on network latency, or in other words, on the end-user experience. The RBS R3 architecture maintains compatible internal baseband interfaces and employs high-capacity boards to serve higherorder configurations. Every uplink and downlink board is compatible with RBS R1 and R2, which is to say the entire network can benefit from functional and performance enhancements to the baseband.
Control handling of standard, small- and mediumsized RBS configurations. Public Safety LTE networks are designed using the proven performance of Ericsson LTE platforms to deliver mission critical broadband services to those responsible for protecting lives and property. Algonquin Road, Schaumburg, Illinois U. All other trademarks are the property of their respective owners. All rights reserved. Related Papers.
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