3.5G / 4G Base Station Serial RapidIO Architecture Trend Solution
As users' demand for mobile data increases, telecom service providers must quickly deploy 3.5G and 4G base stations. This also makes the architecture of the next-generation base station require a high-frequency wide backplane to accommodate multiple baseband card data transmission needs, and the baseband board requires an array of multi-core digital signal processors (DSPs) to provide More powerful fundamental frequency processing capability. How does the IDT solution of Fuwei Group meet these requirements?
As users' demand for mobile data increases, telecom service providers must quickly deploy 3.5G and 4G base stations. This also makes the architecture of the next-generation base station require a high-frequency wide backplane to accommodate multiple baseband card data transmission needs, and the baseband board requires an array of multi-core digital signal processors (DSPs) to provide More powerful fundamental frequency processing capability. To cope with the improvement of DSP performance, the interconnection with multiple DSPs must be performed with high-bandwidth connections, and at the same time, the trace count must be reduced to make the substrate design easier. The growing IDT Central Packet Switches (CPS) series can support Serial RapidIO (sRIO), providing the widest combination of ports and connection arrays, making it easy to expand the modular base station architecture.
User demand prompts the improvement of wireless infrastructure
In the past few years, both in the fixed and mobile network markets, network traffic has shown amazing and rapid growth. For mobile networks, the recent increase in demand for 3G smart mobile phones and PDA-type devices will continue to drive increasing mobile data traffic in the enterprise market. From a general consumption point of view, in the foreseeable future, the biggest factor causing the increasing data traffic will be the download demand for video viewing and sharing. Users want faster network speeds and shorter download times, while pursuing rich media experience. This will encourage telecom service providers to add 3.5G and 3.5G with more powerful capabilities to their existing wireless device combinations. 4G base station.
In the 3.5G and 4G base station architecture, the increase in data transmission rate capability and the pursuit of higher user capacity for each base station have promoted the speed of the backplane between the radio frequency and the baseband card. Therefore, the increase in the overall bandwidth will gradually cause the standard configuration on the baseband card to have more multi-core DSP interconnections.
IDT represented by Fuwei Group uses Serial RapidIO (sRIO) to meet the needs of next-generation base stations. In order to reduce interconnection wiring and maintain the size of the board to meet the increase in system bandwidth, sRIO has gradually become a standard protocol for baseband card architecture . As an open standard, sRIO combines high-bandwidth and high-efficiency packets with direct point-to-point support. This combination is ideal for supporting multiple DSPs in baseband applications.
Data packets must be quickly and correctly routed between DSP, processor, FPGA, other switching components, or any other sRIO-based device. Central Packet Switch (CPS) plays a key role. The increasing supply of DSPs, application-specific signal processors (ASSPs) and programmable logic gate arrays (FPGAs) initiated by sRIO has become equivalent to a sound ecosystem that can provide high-efficiency, cost-effective, Modular solution.
For telecommunications service providers, it is a huge challenge to cost-effectively deploy the correct number of system bandwidth capabilities for specific wireless infrastructure to meet the growing user bandwidth requirements. The most successful base station operators will provide telecommunications service providers with an easily expandable, modular, and common platform base station architecture to promote cross-technology reuse between WCDMA, LTE, WiMAX, and CDMA2000.
For the scalability, composability and reusability of the base station architecture, the flexible sRIO interconnection solution can meet these requirements: including the interconnection of various DSPs on the baseband card, and multiple baseband cards Interconnection. A typical baseband architecture has a single sRIO switch that serves as a link aggregation point between multiple DSPs and other components, such as a control processor, or it may be an FPGA. In the case of multiple baseband cards, they may be connected to another switch, which may also be sRIO. The current sRIO 1.3 version supports 1x and 4x channel configurations per port in 1.25G, 2.5G and 3.125G channel speeds. For any particular base station architecture, 1x and 4x channel port combinations with different channel speeds are very diverse based on system bandwidth and user capacity goals. The 1x to 4x channels commonly used in 1.25G, 2.5G, and 3.125G channel speeds should eventually move to 5G and 6.25G for each channel supported by sRIO version 2.0.
The first generation of CPS-16 and CPS18 devices have been optimized for board-level DSP group applications. Their main function is to have a backplane interface, so they can be connected to a backplane switch or directly to multiple RF cards.
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