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EP-4740699-A1 - AN OUTDOOR SMALL CELL (ODSC) SYSTEM

EP4740699A1EP 4740699 A1EP4740699 A1EP 4740699A1EP-4740699-A1

Abstract

The present disclosure relates to an outdoor small cell (ODSC) system [100] The ODSC system [100] comprises a housing unit [101]. The housing unit [101] houses integrated baseband and transceiver board (IBTB) [102], radio frequency front end board (RFFEB) [104], cavity filter [106], and multiple-input multiple-output (MIMO) antenna [108]. The IBTB [102] is configured to: (a) receive an external input direct current (DC) voltage, (b) pass external input DC voltage through a common electromagnetic interference and electromagnetic compatibility input choke filter, and (c) down convert external input DC voltage to a plurality of signals concurrently. Further, the RFFEB [104] is blind mated to the IBTB [102]. The RFFEB [104] may receive a set of control signals from the IBTB [102] along with a power supply through a connector Radio Frequency Front-End Control Interface Board and provide a fixed attenuation in a feedback path of the RFFEB [104].

Inventors

  • GUPTA, DEEPAK
  • BHATNAGAR, PRADEEP KUMAR
  • BHATNAGAR, AAYUSH
  • KHOSYA, NEKIRAM
  • V, Renuka
  • Bansal, Amrish

Assignees

  • Jio Platforms Limited

Dates

Publication Date
20260513
Application Date
20240618

Claims (13)

  1. 1. An outdoor small cell (ODSC) system [100], the ODSC system [100] comprising: a housing unit [101], wherein the housing unit [101] is configured to house at least: o an integrated baseband and transceiver board (IBTB) [102], wherein the IBTB [102] is configured to: receive an external input direct current (DC) voltage, pass the external input DC voltage through a common electromagnetic interference (EMI) and electromagnetic compatibility (EMC) input choke filter [402], and down convert the external input DC voltage to a plurality of signals concurrently o a radio frequency front end board (RFFEB) [104] blind mated to the IBTB [102], wherein the RFFEB [104] is configured to: receive a set of control signals from the IBTB [102] along with a power supply through a connector Radio Frequency (RF) Front-End Control Interface Board, and provide a fixed attenuation in a feedback path of the RFFEB [104]; o a cavity filter [106]; and o a multiple-input multiple-output (MIMO) antenna [108],
  2. 2. The ODSC system [100] as claimed in claim 1, wherein the IBTB [102] comprises: a network processor [102a] connected to at least a backhaul and a power supply unit, a baseband processor chipset for L2 layer processing and L3 layer processing, a field-programmable gate array (FPGA) chipset for LI layer processing, one or more temperature sensors for measuring a temperature of one or more sections of the IBTB [102] and for enabling an automatic action in an event of a detection of thermal failure, one or more transceivers for monitoring a power amplifier output by measuring a received power on an Analogue-to-Digital Converter (ADC) of the IBTB [102] during utilization of a feedback chain, and a clock and synchronization circuit [110] connected to at least the baseband processor chipset and the one or more transceivers, wherein the clock and synchronization circuit [110] is configured to synchronize the IBTB [102] with one or more units connected to the ODSC system [100], and wherein the clock and synchronization circuit [110] comprises at least one or more ultra-low noise clock generation phase-locked loops (PLLs) [110a], a programmable oscillator [110b], and a system synchronizer integrated circuit (system synchronizer IC) [110c],
  3. 3. The ODSC system [100] as claimed in claim 2, wherein the clock and synchronization circuit [110] is configured based on one of a Global Positioning System (GPS), a Precision Time Protocol (PTP), a holdover technique and one or more clock generators.
  4. 4. The ODSC system [100] as claimed in claim 1, wherein the external input DC voltage is received by the IBTB [102] via a power supply unit [400], and wherein the external input DC voltage is in a range of -40V to -57V.
  5. 5. The ODSC system [100] as claimed in claim 1, wherein the IBTB [102] is designed on eighteen or more layers of a printed circuit board (PCB) and wherein: the PCB is based on a design protocol to route one or more signals between an eighteen or more layers.
  6. 6. The ODSC system [100] as claimed in claim 4, wherein the IBTB [102] is configured to down convert a -48V input DC voltage to: a 28V output signal and a 12V output signal concurrently, based on one or more industry standard bricks, and further convert the 28V output signal and the 12V output signal to a set of target voltage output signals based on a set of requirements of a set of devices connected to the IBTB [102], wherein the 28V output signal, the 12V output signal and the set of target voltage output signals are generated using at least one of a power management integrated chipset (PMIC), one or more DC-DC converters and one or more Linear and low-dropout (LDO) regulator devices.
  7. 7. The ODSC system [100] as claimed in claim 1, wherein the RFFEB [104] comprises: a RF time division duplex (TDD) switch [ 104f], at least four transmit chains for signal transmission, wherein each transmit chain from the four transmit chains carries matching Balun, pre-driver amplifier and final RF power amplifier as final stage power amplifier (PA), four receive chains for signal reception, wherein one or more pairs of dual channels low noise amplifiers (LNAs) cater to two receive chains from the four receive chains having band pass surface acoustic wave (SAW) filter and a matching network, and four observation chains which function as digital pre-distortion (DPD) feedback paths from one or more power amplifier modules (PAMs) to at least one of a field- programmable gate array (FPGA) and an application-specific integrated circuit (ASIC) for linearization.
  8. 8. The ODSC system [100] as claimed in claim 7, wherein each PAM from the one or more PAMs is an off-the-shelf power efficient 50-ohm matched PAM.
  9. 9. The ODSC system [100] as claimed in claim 7, wherein each pair of dual channels LNA from the one or more pairs of dual channels LNAs has a sub IdB Noise Figure (NF) for minimizing RF trace losses on one or more top layers in the ODSC system [100],
  10. 10. The ODSC system [100] as claimed in claim 1, wherein the RFFEB [104] is configured to provide the fixed attenuation for optimizing a cost in the feedback path of the RFFEB section of the ODSC system [100],
  11. 11. The ODSC system [100] as claimed in claim 1, wherein the cavity filter [106] comprises a four-port cavity filter [106] for a four Transmit four Receive (4T4R) configuration providing a steeper roll-off outside an operating band.
  12. 12. The ODSC system [100] as claimed in claim 11, wherein the MIMO antenna [108] comprises four-port cross-polarized patch antennas for the 4T4R configuration.
  13. 13. The ODSC system [100] as claimed in claim 1, wherein the IBTB [102] is configured to down convert the external input DC voltage to the plurality of signals concurrently, based on one or more industry standard bricks.

Description

AN OUTDOOR SMALL CELL (ODSC) SYSTEM FIELD OF THE DISCLOSURE [0001] Embodiments of the present disclosure generally relate to wireless communication systems. More particularly, embodiments of the present disclosure relates to an outdoor small cell (ODSC) system such as a Sub-6GHz 5th generation (5G) new radio (NR) four Transmit four Receive (4T4R) configuration ODSC system. BACKGROUND OF THE DISCLOSURE [0002] The following description of the related art is intended to provide background information pertaining to the field of the disclosure. This section may include certain aspects of the art that may be related to various features of the present disclosure. However, it should be appreciated that this section is used only to enhance the understanding of the reader with respect to the present disclosure, and not as admissions of the prior art. [0003] Wireless communication technology has rapidly evolved over the past few decades, with each generation bringing significant improvements and advancements. The first generation of wireless communication technology was based on analog technology and offered only voice services. However, with the advent of the second-generation (2G) technology, digital communication and data services became possible, and text messaging was introduced. Third generation (3G) technology marked the introduction of high-speed internet access, mobile video calling, and location-based services. The fourth generation (4G) technology revolutionized wireless communication with faster data speeds, better network coverage, and improved security. Currently, the fifth generation (5G) technology is being deployed, promising even faster data speeds, low latency, and the ability to connect multiple devices simultaneously. With each generation, wireless communication technology has become more advanced, sophisticated, and capable of delivering more services to its users. [0004] Moreover, the 5G networks are generally based on small cell technology. Small cells use low-power and short-range wireless transmission systems (or base stations). A small geographical area or small-proximity indoor and outdoor space is covered by the small cells in the 5G networks. Also, 5G new radio (NR) outdoor small cell (ODSC) is medium power gNB (next generation node B) which operates in micro class (typically 6.25 W or 38dBm per antenna port). It complements macro-level wide-area solutions for coverage and capacity and is particularly useful in hot zone/hot spot areas with high traffic and quality of service (QoS) demands. [0005] While a Macro gNB can offer satisfactory coverage and capacity in many situations, dense urban environments with tall buildings may experience intermittent mobile coverage issues. Simply adding more radio signal towers becomes impractical. Similarly, meeting the high capacity demands of numerous mobile users in commercial hubs such as malls, hotels, office blocks, and transportation hubs poses significant challenges. In such scenarios, deploying 5G Outdoor small cell (ODSC) solutions in hotspot locations becomes essential to enhance coverage and capacity, complementing the capabilities of 4G/5G gNB. This efficiently addresses the increased traffic demands in these areas. [0006] As the ODSCs play an important role in the 5G networks, there is a requirement to optimize the cost and performance of these ODSCs. Currently, there is no existing solution to optimize the cost and performance of the ODSCs in an effective and efficient manner. Therefore, there is a need in the art to provide a cost and performance optimized outdoor small cell design, for instance a cost and performance optimized Sub-6GHz 5G new radio (NR) 4T4R Outdoor Small Cell (ODSC). [0007] Thus, there exists an imperative need in the art to provide an optimised outdoor small cell (ODSC) system, which the present disclosure aims to address. OBJECTS OF THE INVENTION [0008] Some of the objects of the present disclosure, which at least one embodiment disclosed herein satisfies are listed herein below. [0009] It is an object of the present disclosure to provide a solution that can enable a cost and performance optimized outdoor small cell (ODSC) design to provide an improved ODSC. [0010] It is another object of the present disclosure to provide a solution that can provide an overall integrated system having a network processor (NW) processor and Field-Programmable Gate Arrays (FPGA) and/or Application-Specific Integrated Circuits (ASIC) for Baseband Transceiver on eighteen or more layers of a printed circuit board (PCB). [0011] It is also an object of the present disclosure to provide a LI layer development and bit stream generation in Field-Programmable Gate Arrays (FPGA) and/or Application-Specific Integrated Circuits (ASIC). [0012] It is yet another object of the present disclosure to provide a solution that can provide clock synchronization architecture using system synchronizer integrated circuit (IC). [0013] It is yet another obje