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AirHarmony-1000 Installation Guide  

UGD-D01006

 

Airspan Commercial and Internal Use 

 

55 

 

LED 

Light Emitting Diode 

LTE 

Long Term Evolution 

MAC 

Medium Access Controller 

– responsible for several functions such 

Error Correction, Packet (De)Multiplexing, etc… 

MBSFN 

Multicast-Broadcast Single Frequency Network is an LTE feature 
designed to deliver services such as Mobile TV using the LTE 
infrastructure, and is expected to be a competitor to DVB-H-based TV 
broadcast 

MCS 

Modulation and Coding Scheme  

MME 

Mobility Management Entity is the key control-node for the LTE 
access-network. It is responsible, among other things for idle mode 
UE tracking and paging procedure including retransmissions 

MTBF 

Mean Time Between Failures 

OFDMA 

Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-
user version of OFDM digital modulation scheme, used for eNodeB 
transmissions to UEs 

PDCP 

Packet Data Convergence Protocol. A Sub-Layer in LTE responsible 
for IP Header (De)Compression, etc… 

PDU 

Protocol Data Unit 

PTP 

Precision Time Protocol is used to synchronize clocks throughout a 
network. In this document, PTP is referring to IEEE1588-2008 protocol 

RB 

Resource Block 

RLC 

Radio Link Control. A Sub-Layer in LTE responsible for Ack/Nack, 
error correction, packet reordering, etc… 

ROHS 

Restriction Of Hazardous Substances 

RRM 

Radio Resource Management is used to cover all functions that are 
related to the assignment and sharing of radio resources among UEs 

S-GW 

Serving Gateway. A Core entity in the LTE EPC architecture 
responsible for routing and forwarding user data packets, while also 
acting as the mobility anchor for the user plane during inter-eNodeB 
handovers and as the anchor for mobility between LTE and other 
3GPP technologies 

SBA 

Switched Beam Antenna 

SC-FDMA 

Single-Carrier FDMA is a frequency-division multiple access scheme, 
dealing with the assignment of multiple users to a shared 
communication resource. Used in LTE for UE transmissions to the 
eNodeB 

SCTP 

Stream Control Transmission Protocol is a reliable transport layer 
protocol, ensuring in-sequence transport of messages with congestion 
control like TCP 

SDR 

Software Defined Radio 

WEEE 

Waste Electrical and Electronic Equipment 

 

Содержание AirHarmony-1000

Страница 1: ...AirHarmony 1000 Installation Guide Part Number UGD D01006 System Release 14 1 Revision A4 Published August 2015 ...

Страница 2: ...Networks Inc for the use thereof nor for the rights of third parties which may be effected in any way by the use of thereof Any representation s in this document concerning performance of Airspan Networks Inc product s are for informational purposes only and are not warranties of future performance either expressed or implied Airspan Networks Inc standard limited warranty stated in its sales contr...

Страница 3: ...Hazardous Voltages 3 Adherence to European Directive 1999 519 EC 3 Warning Symbols 3 Service Information 4 UL Information 4 Lightning Protection 4 DECLARATION OF CONFORMITY 5 GPS Compliance 6 Maximum Output TX Power 7 Power Consumption 7 Antenna System 7 Front Mounted Sector Antenna 7 SelectaBeam Multi beam Antenna 8 AirHarmony 1000 Antenna Usage Options 8 About This Document 10 Purpose 10 Intende...

Страница 4: ... 17 3 2 3 Power Supply 19 3 2 4 Verify Components 19 3 2 5 Physical Dimensions 22 3 2 6 Environmental 23 4 Before Installation of AirHarmony 1000 24 4 1 Connection of GPS Antenna 24 4 2 Weather proofing of the Antenna Connections 24 5 Installing AirHarmony 1000 26 5 1 Pole Mount Assembly 26 5 1 1 Installing AirHarmony 1000 Back to Back 29 5 2 Wall Mount Assembly 30 5 3 Securing AirHarmony 1000 to ...

Страница 5: ...mper Cables to External Antenna 50 A Job Sheet 52 B Checklist 53 C Abbreviations 54 Figures Figure 1 AirHarmony 1000 with front mounted antenna and AirHarmony 1000 with sun shield 9 Figure 2 AirHarmony 1000 assembled with Front Mount antenna and GPS 14 Figure 3 Workflow 15 Figure 4 AirHarmony 1000 Unit bottom termination 22 Figure 5 AirHarmony 1000 Unit Top RF ports 22 Figure 6 Attaching GPS anten...

Страница 6: ...ith DC power connector 39 Figure 33 DC Power connector pre assembled on converter 39 Figure 34 Power connection on bottom panel of AirHarmony 1000 40 Figure 35 Power cable assembly 40 Figure 36 Power cable attached to AirHarmony 1000 40 Figure 37 Waterproof connector exploded view 41 Figure 38 AC power cable preparation 41 Figure 39 Waterproof connector separated 41 Figure 40 Connector on cable 41...

Страница 7: ... Tables Table 1 AirHarmony 1000 FCC Maximum Output TX Power 7 Table 2 AirHarmony 1000 ETSI Maximum Output TX Power 7 Table 3 Power Consumption 7 Table 4 Front Mounted Sector Antenna Parameters 8 Table 5 Omni Antenna Parameters 8 Table 6 Typographic Conventions 10 Table 7 Minimum Hardware Requirements 17 Table 8 Parts Kits 17 Table 9 AirHarmony 1000 additional items 19 Table 10 AirHarmony 1000 Comp...

Страница 8: ...lling the Airspan s AirHarmony 1000 Indoor Pico Enterprise Femto eNodeB variant Revision History Revision Details Date Summary of Changes Rev 0 1 October 2014 Initial document Reformatted and revised the document Rev A A1 November 2014 Updates Rev A2 A3 February 2015 B2B mounting option Updates Rev A4 August 2015 Additional Antenna Additional content ...

Страница 9: ...ted Avoiding Radio Interference Ensure a minimum of 1 meter separation between co located AirHarmony 1000 units Modifications Any changes and modifications to this device that are not expressly approved by Airspan Networks may void the user s authority to operate the equipment General Only qualified personnel should be allowed to install replace and service the equipment The device cannot be sold ...

Страница 10: ...stalled If necessary consult with the appropriate regulatory agencies and inspection authorities to ensure compliance Warning of Hazardous Voltages On AC installations hazardous voltages exist Use caution when verifying or working with AC power Remove metal jewellery that could come into contact with AC power On DC sections short circuiting the low voltage low impedance circuits can cause severe a...

Страница 11: ...mage to equipment A direct lightning strike may cause serious damage even if these guidelines are followed All outdoor wireless equipment is susceptible to lightning damage from a direct hit or induced current from a near strike Lightning protection and grounding practices in local and national electrical codes serve to minimize equipment damage service outages and serious injury The antennas are ...

Страница 12: ...il est conforme aux exigencies essentialles et aux autres dispositions pertinantes de la Directive 1999 5 EC Íslenska Þessi búnaður samrýmist lögboðnum kröfum og öðrum ákvæðum tilskipunar 1999 5 ESB Italiano Questo apparato é conforme ai requisiti essenziali ed agli altri principi sanciti dalla Direttiva 1999 5 EC Nederlands Deze apparatuur voldoet aan de belangrijkste eisen en andere voorzieninge...

Страница 13: ...s CISPR 22 Class B EN 50081 1 Generic Emissions Class B EN 50082 1 Generic Immunity Class B EN 61000 4 2 Electrostatic Discharge Immunity EN 61000 4 3 Radiated RF EM Field Immunity Test EN 61000 4 4 Electrical Fast Transient Burst Test EN 61000 4 6 Conducted Immunity EN 61000 4 8 Magnetic Field Immunity Note A GPS is recommended for synchronizing between LTE sectors Note An optional GPS Lightning ...

Страница 14: ...rHarmony 1000 has a Max nominal power consumption of 130W AirHarmony 1000 power consumption is described in the following table Table 3 Power Consumption Duplex Tx Power at RF Port dBm Nominal Power Consumption W Power Supply Requirement W FDD TBD TBD TBD TDD 37 156 200 Antenna System The following antennas are designed specifically for AirHarmony 1000 deployments Externally mounted antennas are a...

Страница 15: ...C 800 provides four direction beams and an omnidirectional pattern covering 360 in azimuth Beam selection is achieved via a digital control interface Table 5 Omni Antenna Parameters Parameter 2 x GHz Frequency 2 3 2 7 Polarization Dual Slant 45 Polarization discrimination 16 dB Boresight gain 2 0 dBi Peak gain 7 5 dBi Azimuth HPBW Omni Directional Elevation HPBW 20 Electrical tilt N A Grounding DC...

Страница 16: ...AirHarmony 1000 Installation Guide UGD D01006 Airspan Commercial and Internal Use 9 Figure 1 AirHarmony 1000 with front mounted antenna and AirHarmony 1000 with sun shield ...

Страница 17: ...ollowing typographic conventions Table 6 Typographic Conventions Convention Element Blue underlined text Cross reference links Bold text Keyboard buttons and GUI elements Command Command names or phrases Computer output Text displayed by the computer Hyperlinks Website and e mail addresses Danger Signifies a hazardous situation if not avoided will cause death or serious injury Describes how to avo...

Страница 18: ...Harmony 1000 Installation Describes how to install AirHarmony 1000 Install the AC DC converter AC DC converter installation Connect and Manage Cables Describes how to connect the cables Job Sheet Provides information that aids users in performing the installation Checklist Provides an overview of the high level steps involved in the workflow Abbreviations Lists the abbreviations used in this docum...

Страница 19: ...ends an issue number for your reference The system uses this issue number to categorize and store e mails under the appropriate issue To help Customer Care Help Desk identify your issue include the issue number and your Customer Care Helpdesk account details in all further communications Main Operations Airspan Communications Ltd Capital Point 33 Bath Road Slough Berkshire SL1 3UF United Kingdom T...

Страница 20: ...sumption and operator OPEX AirHarmony 1000 will support a wide array of frequencies and channel sizes able to operate in both licensed and unlicensed bands Frequencies and channel sizes will be added regularly AirHarmony 1000 implements dual 37 dBm 2 x 5W transmitters with the availability of several optional integral antennas and external antennas connectivity AirHarmony 1000 fully supports the s...

Страница 21: ...01006 Airspan Commercial and Internal Use 14 Figure 2 AirHarmony 1000 assembled with Front Mount antenna and GPS Note The illustration above displays the GPS connected directly to the top of the unit there is also a remote GPS antenna option ...

Страница 22: ...ommercial and Internal Use 15 2 Getting Started 2 1 Workflow of Installation The Workflow to install the AirHarmony 1000 is shown in the following diagram Figure 3 Workflow Caution Antennas must be connected and attached before AirHarmony 1000 is powered on ...

Страница 23: ...D01006 Airspan Commercial and Internal Use 16 2 2 AirHarmony 1000 Installation Checklist Plan the installation of the AirHarmony 1000 by using the Installation Checklist which you can find as a removable job aid in Appendix A for this guide ...

Страница 24: ...ecuring flange nuts Large pliers Tightening cable glands To fit 15mm 3 2 2 Verify the Parts and Kits Note Verify order and requirements to ensure the correct unit type is being installed Table 8 Parts Kits Installation Kit Part Part No Consisting of Note AirHarmony 1000 2 5 GHz B38 B41 Conn HAR10 CN U41 B01D AirHarmony 1000 2 496 2 69 GHz B38 B41 Connectorized Fiber BH DC output 16AWG x 4 connecte...

Страница 25: ... 30 70C EN60950 1 SYN PSU ODUL AC 2 DC side cable is pre connected to the AirHarmony 1000 DC plug Cable length is 300 1000mm AC side cable 3 wires brown blue green Cable length 300mm should be connected to the AC cable by using the weather proof cable joiner AC cable weather proof cable joiner SYN PWR JOIN 1 AC DC converter supplied pre connected to the DC plug DC cable length is 300mm or 1000mm A...

Страница 26: ...Transceiver FTLF1318P3BTL 1000BASE LX Tested and approved by Airspan Available from Airspan if required Table 9 AirHarmony 1000 additional items Additional Common Accessories not provided by Airspan Cable ties 3 2 3 Power Supply AirHarmony 1000 supports direct connection to DC power source 48V DC Operational Voltage Range 40 5 to 57 VDC Transient Voltage 150V ETR283 AC power feed is also available...

Страница 27: ...e 10 AirHarmony 1000 Components Parts Images AirHarmony 1000 Unit with front mounted antenna in typical packing box HAR10 FM U40 B01D AirHarmony 1000 Unit with Sunshield in typical packing box Pending HAR10 CN U40 B01D Universal mounting plate HAR10 U PMK 1 Pole Clamps X 2 included in above ...

Страница 28: ...SU shown Mounting bracket hardware Circular connectors male female Serratub Maxi Clamp 2 GPS antenna GPS ANT 2 AC cable 3x18AWG Outer Fiber Cables ASX Optical cables in 8 available lengths Ground cable with grounding lug Note that the cable is ordered per meter and the lug is ordered separately Crimping is done by the user PVC Insulation tape Self Amalgamating Tape ...

Страница 29: ... end views respectively Copper Ethernet connection is currently unsupported Figure 4 AirHarmony 1000 Unit bottom termination Figure 5 AirHarmony 1000 Unit Top RF ports 3 2 5 Physical Dimensions AirHarmony 1000 is in an all outdoor enclosure Table 11 AirHarmony 1000 Physical Dimensions Variant Dimensions H x W x D Comment Initial Deliveries Front Mount only ...

Страница 30: ... 20 lb pending 3 2 6 Environmental Note AirHarmony 1000 is not meant to be used in a Marine environment AirHarmony 1000 meets the following environmental requirements ETSI EN 300 019 1 4 Operational non weather protected equipment ETSI EN 300 019 1 1 Storage weather protected not temperature controlled locations ETSI EN 300 019 1 2 Transportation Table 12 AirHarmony 1000 Environment Compliance Typ...

Страница 31: ...ching GPS antenna to unit Caution Take care not to over tighten so as not to damage the threads Note It is good practice to weather proof the antenna connections both the GPS connection and the RF connections 4 2 Weather proofing of the Antenna Connections Weather proofing of all the connections is required This is done with a layer of self amalgamating tape followed by an over layer of PVC tape T...

Страница 32: ...RF failures can result when the RF connector is over tightened Figure 8 Weather proof the connection 2 Weather proofing of the connections is mandatory This is done with a layer of self amalgamating tape followed by an over layer of PVC tape Both the self amalgamating tape and the PVC tape are available from Airspan 3 Verify the RF connector is completely weather proof ...

Страница 33: ...all the mounting plate the correct way up This is with the slot openings in the bracket at the top edges as shown below Caution Proper local rigging and hoisting practices should be followed when installing the AirHarmony 1000 5 1 Pole Mount Assembly The following images show the pole mount assembly 1 Prepare the mounting plate by assembling the pole clamps in the provided threaded holes with the ...

Страница 34: ...d clamp bands through the quick release locking mechanisms and wrap around pole Figure 11 Assemble clamp bands 4 required 5 Wrap the band to properly fit on the pole Press down locking mechanism with band excess fed through the mechanism Figure 12 Press down locking mechanism 6 Align and position each of the 4 pole clamps Tighten the clamp bands with large flat screwdriver in place ...

Страница 35: ... 1000 Installation Guide UGD D01006 Airspan Commercial and Internal Use 28 Figure 13 Tighten clamp bands 7 Mounting plate is installed and ready for AirHarmony 1000 mounting Figure 14 Pole mounting exploded view ...

Страница 36: ...eploy two 2 AirHarmony 1000 s on the same pole back to back then the installation must be performed so that the clamp bands used to secure the units to the pole do not interfere with the clamp bands of the other unit Each unit is installed separately as explained above in Installing AirHarmony 1000 The clamp bands are installed with a small deviation to each other as displayed below ...

Страница 37: ...y 1000 must be mounted on the pole prior to assembling the AirHarmony 1000 units Assemble each unit s AC DC Converter as explained in AC DC Converter Pole Mount Assembly with the same deviation of the clamp bands 5 2 Wall Mount Assembly The following images show the wall mount assembly 1 Position mounting plate against the wall with slots facing up Be sure to position the wall mounting plate strai...

Страница 38: ...mount at the required height 3 Attach the mounting plate to the wall using wall plugs x4 rated for at least 8 10 Kg per fastener Figure 18 Wall mounting plate fastened on wall Note Wall plugs x4 and necessary hardware are not supplied by Airspan and are the responsibility of the installer Recommended minimum 8mm dia with appropriate wall plugs according to field conditions ...

Страница 39: ...AirHarmony 1000 to the mounting plate perform the following 1 Loosely fit the flange nuts on the studs protruding from the sides of the unit Figure 19 Lift unit to top of mounting plate 2 Hook the studs into the top slots of the mounting plate Figure 20 unit engages into slots on the top of mounting plate 3 With the studs engaged in the top slots raise the unit slightly until the bottom studs also...

Страница 40: ...r assembly to adjust the front mounted antenna tilt down There are adjustment slots located on the sides of unit body and on the sides of the front mounted antenna mounting plate Note Combined tilt adjustment of both the unit body and the antenna yield a maximum down tilt of 7 5 The antenna has an electrical fixed down tilt of 1 1 Slightly loosen the upper flange nuts 2 where the unit is fixed to ...

Страница 41: ... SW starts loading Software loading Green Blinking 3Hz While SW is loading Normal Operation Green On Continuously Normal operation no alarm Major Alarm Red Blinking 3Hz Service not affected Critical Alarm or Sector OOS Red On Continuously 5 6 Connecting the Ground Cable Connect the ground cable after attaching the grounding lug optionally supplied by Airspan CBL GND 1M 1 and CON LUG GND 1 to the M...

Страница 42: ... onto the screw prior to re setting into the threaded hole Figure 24 Attaching ground cable to AirHarmony 1000 2 Connect the ground cable to the protection ground bar using suitable crimp lugs Alternatively use a clamp to bond the ground cable to the mounting pole or to the tower structure Figure 25 attach ground cable to pole example Note Above drawing is for illustration only use locally approve...

Страница 43: ... DC Converter can be mounted on a pole with the supplied mounting bracket or on a wall The AC DC Converter should be mounted in close proximity to the AirHarmony 1000 so as to facilitate the proper connection 5 7 1 AC DC Converter Pole Mount Assembly The following images show the pole mount assembly 1 Insert the clamp straps through the slots in the mounting bracket 2 Position mounting bracket on ...

Страница 44: ...r Wall Mount Assembly The following images show the wall mount assembly The converter can be fastened directly to a wall utilizing the holes on the unit body 4 places Note For the wall mount assembly the mounting bracket is not required Note The AC DC converter can be mounted horizontally if required 1 Position AC DC Converter against the wall in close proximity to the AirHarmony 1000 so as to fac...

Страница 45: ...Internal Use 38 Figure 30 Wall mount exploded view Figure 31 Wall mount Note Wall plugs x4 and necessary hardware are not supplied by Airspan and are the responsibility of the installer Recommended minimum 8mm dia with appropriate wall plugs according to field conditions ...

Страница 46: ...The Power cable is connected to the AirHarmony 1000 using a Gland connector assembled on the bottom panel of the unit 1 Remove the connector by unscrewing the body from the AirHarmony 1000 using the Gland wrench 2 Pass the pre assembled connector through the tail nut gland seal body and rubber seal of the connector casing as shown below Do not tighten the tail nut Figure 33 DC Power connector pre ...

Страница 47: ...r cable assembly Caution Do not over tighten the gland connector or the tail nut The gland nut should be tightened to a torque of no more than 3 3 Nm 2 43 lb ft max Note When securing the cable verify there is no tension on the connector so that it is easy to disconnect and re connect for future maintenance actions Caution The internal plastic parts of the mating connector are keyed Take care to a...

Страница 48: ... electric gels is not required The power cable is available in various lengths as required Figure 37 Waterproof connector exploded view 1 Route and bring the unterminated end of the AC power cable to the location of the AC DC converter 2 Strip back and remove the outer sheath to expose the inner brown blue and green insulated wires to a length of 3cm 1 18 in Then strip back 6mm 0 24 in of the inne...

Страница 49: ... 6 Insert and secure the brown wire into position 1 and the blue wire into position 2 and green wire into position earth ground Figure 42 Power cable wires assembled Note Individual connection numbers are marked on each part of the connector Note Set screw maximum recommended tightening torque of 0 3 Nm Figure 43 Numbered connector contacts 7 Assemble the parts of the connector and tighten the gla...

Страница 50: ... DC converter cable connector assembly 4 Insert and secure the white wire into position 1 and the black wire into position 2 and green wire into position earth ground Figure 46 AC DC converter wires assembled 5 Assemble the parts of the connector and tighten the gland to provide a waterproof seal Figure 47 Assemble and tighten 6 Fasten the 2 parts of the connector together and tighten to make a wa...

Страница 51: ...ather conditions Note Airspan recommends using the Finisar FTLF1318P3BTL 1000BASE LX which has been tested and approved by Airspan Available from Airspan if required The Outdoor fiber cable is available in 8 different lengths from 10m to 200m Note Airspan recommends to test the fibers prior to installation using FOA s standard testing industry standards Note Airspan recommends to clean the fibers ...

Страница 52: ...he board connector 5 Slide the inner housing and ground shield if present over the cable and over the molding Figure 51 Slide on inner housing Note Check that there no space between the inner housing and mounting flange Check and remove any debris that might interfere with the connection 6 Slide the outer shell over the inner housing and turn the outer bayonet shell 1 4 turn clockwise until it cli...

Страница 53: ...tual tools or hardware may differ according to manufacturer The following demonstrates the recommended assembly instructions hardware and tool requirements for the proper Ethernet cable assembly of the Ethernet Category 5e enhanced CAT5e cable used by Airspan products The Ethernet cable is connected using a standard RJ45 connector protected by a harsh environment protective casing 6 5 1 Hardware R...

Страница 54: ... to properly assemble the Ethernet cable follow the steps listed below 1 Unroll the required length of Ethernet cable CAT5e and add a little extra wire just in case 2 Cut the required length of the cable 3 Prior to stripping pass the cable thru the tail nut seal body front connector and front seal self stick of the connector casing Figure 53 Ethernet cable thru connector 4 Peal and stick the front...

Страница 55: ...re 56 cable trimmed 8 Hold the connector in front of you with the locking tab down Orient the wires so connector Pin 1 aligns with cable Pin 1 etc 9 Grip the wires and sheath between thumb and forefinger to hold them together 10 Gently slide the wires into the RJ45 plug until they begin to track into the inner channels of the plug Figure 57 RJ45 plug assembly 11 Push the wires all the way into the...

Страница 56: ...d of equal height after crimping 13 Place the drain wire of the cable thru the metal shell of the shielded plug 14 Crimp the drain wire to the metal shell of the shielded plug with the crimping tool Figure 59 Crimped cable 15 Seat the RJ45 connector plug securely into the body cavity 16 With an Ethernet cable tester test to verify the proper connectivity of the cable 17 Tighten the tail nut on to ...

Страница 57: ...ith a sunshield To mount the front antenna perform the following 1 Fit the antenna to the antenna mounting plate The four 4 studs on the back of the antenna pass through the front face of the mounting plate and are secured with the 4 sets of M4 nuts and washers flat and split included in the kit Carefully position the lead RF cables and secure them in place to the eyelets on the back of the mounti...

Страница 58: ...ly 1 Attach connect and secure the RF cable between the external antenna and the appropriate RF connection on the top of the unit Figure 62 Connecting RF cable Caution Do not over tighten the RF connector RF failures can result when the RF connector is over tightened Figure 63 Weather proof the connection 2 Weather proofing of the RF N type connections is recommended This is done with a layer of s...

Страница 59: ...if applicable o All equipment items available at the installation site o Main AirHarmony 1000 unit o Mounting bracket and pole clamps o AC DC converter o GPS Antenna o Self amalgamating tape o Black PVC tape o Weather proofing of the connections with a layer of self amalgamating tape followed by an over layer of PVC tape o SFP cable assembly Tool Requirements For further information see Verify the...

Страница 60: ...sks detach or print this checklist and use it as a job aid After performing check off each task Procedure Action Check If Performed Verify the prerequisites Verify the site requirements Verify the installation requirements Verify the tool requirements Verify the parts kits required AirHarmony 1000 installation Install the mounting bracket Install AC DC converter on mounting bracket if required Ins...

Страница 61: ...P provide confidentiality data origin authentication connectionless integrity an anti replay service a form of partial sequence integrity and limited traffic flow confidentiality E UTRAN Evolved UMTS Terrestrial Radio Access Network is the air interface of 3GPP s Long Term Evolution EVM RCE The Error Vector Magnitude or EVM sometimes also called Receive Constellation Error or RCE is a measure used...

Страница 62: ...Unit PTP Precision Time Protocol is used to synchronize clocks throughout a network In this document PTP is referring to IEEE1588 2008 protocol RB Resource Block RLC Radio Link Control A Sub Layer in LTE responsible for Ack Nack error correction packet reordering etc ROHS Restriction Of Hazardous Substances RRM Radio Resource Management is used to cover all functions that are related to the assign...

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