View richard maidens profile on linkedin, the worlds largest professional community. It is forecasted to grow fold from 2012 until 2017 according to cisco 1, with smart phones and tablet users driving the growth. Introduction m obile data transmission volume is continuously rising. The iq compression ip core is a silicon agnostic implementation of a compression and decompression scheme enabling doubling data capacity on existing cpri or ethernet based links or alternatively running lower speed links between remote radio units and baseband cards with the same radio ressource capacity. This paper describes a method of using mulaw compression for gaussianlike waveforms for example, baseband iq data, as used in cpri interfaces. Improvements to efficiency and link capacity utilization were requested. Introduction to iq demodulation of rf data september 15, 1999 page 3 of 1 introduction 1.
Sap iq data compression ratio sap iq community wiki. Supercomputing at the mobile edge overview 2 accelerating mobile edge compute mec with rapidio mec servers architected on rapidio take advantage of the 100ns latency and throughputs of up to 40g. Esc prism iq compression technology lowers costs for. The cpri signal is characterized by hyperframe composed of 256 basic frames bf. Mar 24, 2014 required cpri link capacity in function of radio technologies 1. Cpri re testing more and more mobile radio networks implement remote radio equipment re that is connected to the base station main unit via a digital interface using standardized transmission protocols such as cpri. Operator view of cpri features although cpri has been the main fronthaul interface standard, many operators started to question its suitability to high bandwidth 5g use cases. For over 25 years, ahas applicationspecific compression algorithm products have been improving performance in data storage, networking, copiers, printers, scanners and other imaging equipment.
Samplify offers iq compression for 4g conversion ee times. Cpri iq data compression for cost effective fronthaul. Cpri supports a continuous range of distances between master and slave port. May 28, 2014 iq compresses data in several ways, making it difficult to esttimate a compression ratio. Introduction 2 the common public radio interface cpri is an industry cooperation aimed at defining publicly available 3 specifications for the key internal interface of radio base stations, such as ecpri connecting the ecpri. Samplify systems granted patent for compression across.
Lossy audio compression algorithms provide higher compression at the cost of fidelity and are used in. Richard maiden director intel corporation linkedin. Petagene lossless genomic data compression for bam or. May 28, 2019 data compression is the process of modifying, encoding or converting the bits structure of data in such a way that it consumes less space on disk.
Cpri is a layer 1 and layer 2 protocol, supports the bidirectional transmission of digital radio signals in form of quantized iq inphase and quadraturephase samples at a constant bit rate along with the specifications of data and control planes. Prism iq reduces the fiber optic bandwidth requirements for wireless base stations by over 2. Since core iq is connected to your core, we can track which customers receive a given product offer and match their conversion to your core data. Reducing data size for storage, transmission, and cpu overhead are the key benefits of ahas line of lossless data compression ics and addin cards. Keystone ii architecture iqnet2 users guide literature number. Data compression is the process of modifying, encoding or converting the bits structure of data in such a way that it consumes less space on disk. Project title, cpri iq data compression for cost effective fronthaul.
Cpri payload iq data block 120bits 8b10b encoding cpri link option 1. Rrh frame structure cpri frame structure,cpri line rate. Also, different forms for compression, such as iq resampling, huffman coding, etc. Ori release 4, published in october 2014, is based on cpri version 6. It enables reducing the storage size of one or more data instances or elements. Introduction to iq demodulation of rfdata september 15, 1999 page 3 of 1 introduction 1. Iq data is the representation data type of this cosine function. Cpri and its main features, including the user plane data, control and management, and synchronization information multiplexing. Cpri interface covers two layers layer1 physical layer and layer2data link layer. Software defined applications in cellular and optical networks. The figure below depicts cpri protocol stack mentioning this layers. Audio compression algorithms are implemented in software as audio codecs.
A simple and efficient iq data compression method based on latency, evm. The maximum use case in ltea is 8x8 mimo and 5x 20 mhz lte carriers requires a cpri line rate of 40. Oct 01, 2018 cpri is a layer 1 and layer 2 protocol, supports the bidirectional transmission of digital radio signals in form of quantized iq inphase and quadraturephase samples at a constant bit rate along with the specifications of data and control planes. A study of fronthaul networks in crans requirements and. Wo2019035750a1 method and transition device for enabling. Iq compresses data in several ways, making it difficult to esttimate a compression ratio. Required cpri link capacity in function of radio technologies. Lossy audio compression algorithms provide higher compression at the cost of fidelity and are used in numerous audio applications. At the transmitter side, a signal generator creates a 20 mhz lte signal. The minimum recommended match length is ignored and data expansion does occur when adding the rdp 6. As wireless standards have evolved, the bandwidth needs for iq data have. Cpri compression compounds the difficultly since different bit widths can be used.
Idt iq compression ip for wireless systems offers the industrys highest performance for 3g and 4g systems. The measurement looks for quiet minimum power, idle. Compression technology applicable to iq samples over various protocols e. Xilinx offer solutions around switching needs to service the large number of remote radio heads rrh by the baseband processing unit iq switching, a lightweight ethernet switch for servicing a small number of rrh daisy chained or otherwise connected together, as well as iq compression to effectively increase the fronthaul bandwidth without. The cpri standard defines this highspeed, constant bit rate, bidirectional masterslave protocol used to connect a bbu and rrh. Release 4 adds iq data compression for lte and supports a line bit rate up to 10.
There is a unique transformation between the two, and the different notations have different properties calculating with them. Petagenes petasuite compression software and cloudcomputing solutions speed up data transfers and reduce storage costs for research projects involving genomics data. Data transfer, header compression, ciphering, integrity protection rlc 3gpp ts 36. White paper digital iq data capture and correction abstract. Introduction the fifth generation of mobile networks will be characterized by an increasing number of services, growing number of wireless devices and aggregate data traffic. Supercompute densities such as these make big network data analysis, video.
An overview of the cpri speciacation and its application to c. The cpri defined the rfphy functional split between the rrhs and bbu pool 19 and supports a. Existing compression solutions cannot meet these performance requirements at low evm. Xilinx offer solutions around switching needs to service the large number of remote radio heads rrh by the baseband processing unit iq switching, a lightweight ethernet switch for servicing a small number of rrh daisy chained or otherwise connected together, as well as iq compression to effectively increase the fronthaul bandwidth without using additional fiber or other techniques. Allinone marketing platform for banks and credit unions request a demo systems core iq can replace. In contrast to cpri, the ecpri specification supports more flexibility in the.
A mt2780a ug advanced set the noise floor if the calibration factor for the uplink being measured is not known, the advanced option can measure the noise floor of the rrh under test from the cpri data. Also advanced networking and oam features of mainstream packet transport standards were requested. This paper proposes a new iq data compression scheme with 12 compression. Iq data which is user plane information in the form of inphase and quadrature phase modulation data i. The remaining part of the bf can be used to carry iq data. The minimum required range for the cable length is. Low low compression of baseband cpri data edn september 17. Mulaw compression is common in audio applications and is efficient to implement, but it has an excessive loss in fidelity for baseband signals.
Performance demonstration of real time compressed cpri. Lteltea signal compression on the cpri interface bin guo, wei cao, an tao, and dragan samardzija the centralized, cooperative, cloud radio access network cran is a nextgeneration wireless access network architecture based on centralized processing, collaborative radio, and real time cloud infrastructure. In the centralizedran cran, some baseband units bbus are centralized in the same location, which is typically less than 20 km away from remote radio. It supports gsm, wcdma, and lte signals at full cpri data rates, keeping high signal quality at compression rates up to 4. The cpri 225 receives or generates iq data and provides the iq data to the rru 110 and eventually transmits the iq data to the mobile devices via antennas 142. Compression in sap iq in iq, compression comes in two forms tokenization fp1, fp2 fp3 indexes and page compression when written to disk. After that we provide an application example of an overview of the cpri speciacation and its application to cranbased lte scenarios. Quickly build and send responsive emails and product offers using dynamically merged data. The document is intended for users of the rf options on the system five. One antennacarrier is the amount of digital baseband iq uplane data necessary for either reception or transmission of only one carrier at one independent antenna element. Compression significantly reduces cpri data rate requirements and provides system cost savings by using lower data rate optics. User data multiple baseband compression techniques are currently being researched commercially available iq compression causes some distortion in iq constellation iq compression currently is below a ratio of 3 to 1. Various topologies such as chain, ring or tree exist between them. Cpri protocol stack rrh layer1,layer2 protocol layers.
To address surging costs of cpribased fronthaul to be caused because of drasticallyincreased ultra high capacity of 5g base station, measures have been proposed. It is delivered with an extensive documentation that, among others, includes product brief, user manual, verification guide, regression test environment, test cases and test reports. Comp, virtualization, inphase and quadrature iq compression, cpri. Deliverables the ip core comes deeply verified, interoperability tested with majority of physerdes devices and key data converter design. A new iq data compression scheme for fronthaul link in. Cpri protocol overview cpri supports transmission of all iq data between rec and re in both directions compliant to 3gpp utra fdd, release 5 june 2004 radio standard in logical scope.
Lte bw 10mhz lte bw 20mhz netmanias oneshot march 2014 0 b7 0 1 260. This paper proposes a new iq data compression scheme with 12. To address surging costs of cpri based fronthaul to be caused because of drasticallyincreased ultra high capacity of 5g base station, measures have been proposed. With a large ecosystem of standardsbased boards such as those based on the advanced mezzanine standard and open source software, system and. Cpri is a serial line interface transmitting constant bit rate cbr data over a dedicated channel, while. We are pleased to announce that astrazeneca has selected petasuite software to compress the genomics data sets for astrazenecas centre for genomics research cgr. Each rrh is connected to bbus via fronthaul link by optical fibers which convey the digital iq data by cpri protocol. Both the cpri compression and iq mapper tool have been.
Samplifys prism iq compression technology reduces the fiber optic bandwidth requirements for wireless base stations by a factor of two, halving the bit rate. The cpri standard provides a frame structure and general approach to mapping iq data on the cpri frame, but there is no rigid standard, and vendors implement a variety of schemes. Us7680149b2 cpri link multiplex transmission method and. Support for line rate 8, which addresses signals up to 10. The decompressor 255 performs a decompression on the compressed iq data and the normalization bits to obtain iq data and transmits the iq data to cpri 225. Iq data is the rectangular representation of the polar notation we used above. Data of bandwidths up to 36 mhz span may be collected continuously at these ports. However, iq offers certain tools to help see page compression. The common public radio interface cpri intel fpga ip core implements the cpri specification v7. This architecture reduces costs for service providers because only the remote radio heads containing the re need to be situated in environmentally challenging locations.
In cran architecture, digitized baseband complex inphasei and quadrature q samples are transported over the high speed links 2. In the case of ltea cpri, compression will enable the fronthaul. So we have 256 control words that are allocated to different purposes, e. Cpri compression transport for lte and ltea signal in cran. Iq compression ip core is a silicon agnostic implementation of a compression and decompression scheme enabling doubling data capacity on existing cpri. The compression capability allows for resampling of 20 mhz bandwidth iq data signals from 30. Aviat networks compression will likely be required to make wireless cpri fronthaul a reality takeaway.
Anritsu company expands capability of industryleading. A new iq data compression scheme for fronthaul link in centralized. The cpri interface supports following information types. First introduced for 3g systems, cpri is a standard for carrying baseband iq data across fiber optic connections between radio units at the top, and baseband units at the bottom of the.
The problem is that these recordings can take up massive amounts of hard disk space. The iq compression ip core is a silicon agnostic implementation of a compression and decompression scheme enabling doubling data capacity on exiting cpri. An overview of the cpri specification and its application to cran. The needed fronthaul capacity can be limited by cpri compression 5, or by functional. Cpri allows the use of a distributed architecture where basestations, containing the rec, are connected to remote radio heads via lossless fibre links that carry the cpri data.
User data plane, cpri planes control, planes data management and cpri frame synchronization are also discussed. Cpri is a highspeed serial interface for network radio equipment controllers rec to receive data from and provide data to remote radio equipment re. This allows you to see true product conversions right inside core iq s marketing dashboard. The iq compression ip core is a silicon agnostic implementation of a compression and decompression scheme enabling doubling data capacity on exiting cpri or ethernet based links or alternatively running lower speed links between remote radio units and baseband. The iq compression ip core is a silicon agnostic implementation of a compression and decompression scheme enabling doubling data capacity on existing cpri or ethernet based links or alternatively running lower speed links between remote radio units and baseband.
Ori activity 2 the ori interface is built on top of the interface. Cpri compression transport for lte and ltea signal in c. Physical transport optical transmission over fiber layer 2. In this paper a lowlatency baseband signal compression algorithm used in alu. Audio data compression, not to be confused with dynamic range compression, has the potential to reduce the transmission bandwidth and storage requirements of audio data. The example in this section is merely illustrative of the rdp 6. Reduce the cost of your cpri links for 3g and 4g wireless. The obtained basic cpri frame format information on the one hand is used by the cmf frame forming unit 29 to generate a cmf frame carrying the basic cpri frame format information, and on the other hand is delivered to the cpri frame compressing unit 21 to control the compression operation on the cpri frame. Cpri supports transmission of all iq data between rec and re in both directions compliant to 3gpp utra fdd, release 5 june 2004 radio standard in logical scope. The rrh frame is made upto 10 ms duration with total 150. Quantizationbased modulation and coding scheme for mobile. Data compression is also known as source coding or bitrate reduction.