185724241 sran8 0 lte multi mode feature description 01 20130218

SRAN3.0 Optional Feature Description

Issue 01

Date 2013-02-18

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2013. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders.

NoticeThe purchased products, services and features are stipulated by the commercial contract made between Huawei and the customer. All or partial products, services and features described in this document may not be within the purchased scope or the usage scope. Unless otherwise agreed by the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.Except for the special declaration, LTE in this document is regarded as LTE FDD.Except for the special declaration, MRRU in this document is regarded as RRU3908 V1/V2, RRU3928, RRU3929, RRU3926, RRU3942 or RRU3960.Except for the special declaration, MRFU in this document is regarded as MFRU V1/V2, MRFUd or MRFUe.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial BaseBantian, LonggangShenzhen 518129P.R.C.

Website: http://www.huawei.com

Email: [email protected]

Huawei Proprietary and Confidential Copyright Huawei Technologies Co.,

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Contents

Multi-mode Evolution.......................................................................4LTE Multi-mode basic features......................................................................................................................................4

MRFD-230002 Multi-mode BS RRU/RFU star-connection with separate CPRI Interface(eNodeB)........................4SingleSite........................................................................................................................................................................6

MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side(eNodeB)..........................................................6MRFD-231505 Bandwidth sharing of MBTS Multi-mode Co-Transmission(eNodeB)...........................................12MRFD-231601 Multi-mode BS Common Reference Clock(eNodeB).....................................................................14MRFD-231602 Multi-mode BS Common IPSec (LTE)............................................................................................19

Easy Refarming............................................................................................................................................................21MRFD-231806 GSM and LTE Dynamic Power Sharing(LTE)................................................................................21MRFD-231808 GSM and LTE Buffer Zone Optimization(LTE)..............................................................................23

Power Consumption Saving.........................................................................................................................................251.1.1 MRFD-231901 Multi-RAT Carrier Joint Shutdown (eNodeB)........................................................................25

Acronyms and Abbreviations..........................................................28


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Multi-mode Evolution

LTE Multi-mode basic featuresMRFD-230002 Multi-mode BS RRU/RFU star-connection with separate CPRI Interface(eNodeB)AvailabilityThis feature is available from SRAN2.0, from SRAN5.0 GSM and LTE is supported.

GBTS and eNodeB RRU/RFU star-connection with separate CPRI Interface

SummaryGSM and LTE Multi-mode RRU/RFU star-connection with separate CPRI interface.

BenefitsGSM and LTE data transmit on the CPRI interface are separate, thus the GSM and LTE can work in the concurrent mode in the same RF module without impact on each other when new mode is introduced. Also it will expand the interface number when working in the GL concurrent mode.

DescriptionGSM and LTE Multi-mode RRU/RFU star-connection with separate CPRI interface to BBU.


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EnhancementUBRI is supported in SRAN3.0 to expand CPRI interface number of GSM mode for the dual mode networking scenario.

DependencyImpacts on the MBSC hardware

None

Impacts on the MBTS hardware

For dual mode scenario, if RF modulesMRFU/MRRU working in GSM mode is more than 6, UBRI is needed

Dependency on other features of the GBSS/RAN

None

Dependency on other NEs

None

Dependency on other Modes

This feature has to be activated with MRFD-210002 Multi-mode BS RRU/RFU star-connection with separate CPRI interface(GBTS) simultaneously


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LBBP

LBBP

UFAN

LBBP

LBBP

LMPT

GTMU

UPEU

RFU/RRU

RFU/RRU

RFU/RRU

BBU

GSM data

LTE data


SingleSiteMRFD-231501 IP-Based Multi-mode Co-Transmission on BS

side(eNodeB)AvailabilityThis feature is available from SRAN5.0.

IP-Based Dual-Mode Co-Transmission between GBTS and eNodeB

SummaryHuawei introduced the IP-based Dual-Mode Co-Transmission between BTS and eNodeB function in SRAN5.0.

This function dynamically multiplexes BTS and eNodeB data onto one transmission link, saving transmission equipment and simplifying the transport network.

BenefitsThis function provides the following benefits:

Reduced investment in transmission equipment Fewer transmission resources required for the communication between the base station

and routers Simplified transport network Convenient network maintenance

DescriptionHuawei radio equipment supports the GSM/LTE co-transmission in IP mode on the MBTS side. The dynamic multiplexing of the GSM and LTE data on the MBTS side saves the transmission resources of the last mile between the MBTS and the router and simplies the wireless transmission network. This feature is applicable to MBTS or GBTSeNodeB co-sited scenarios.

The GSM and LTE data can be dynamically multiplexed onto the IP transport network. Based on different destination IP addresses, the GSM and LTE services can be routed to the corresponding BSC or MME/S-GW. The following figure shows the co-transmission principles.

pTRA

UpT

RAU

pTRA

U

IP

GBSC

eNodeB

GBTS

MME/S-GW

Co-transmission

UDP

IP

/

PPP

IP SW

Router

GTP

-UG

TP-U

GTP

-U

GTP

-UGT

P-U

LTEGSM

LTEGSM

pTRA

UpT

RAU

pTRA

UGT

P-U

GTP

-UGT

P-U

GTP

-UGT

P-U

UDP

IP

/

PPP

IP SW

Router

pTRAU Packetlized TRAU frame

pTRA

UpT

RAU

pTRA

U

IP

GBSC

eNodeB

GBTS

MME/S-GW

Co-transmission

UDP

IP

/

PPP

IP SW

Router

GTP

-UG

TP-U

GTP

-U

GTP

-UGT

P-U

LTEGSMLTE

GSMLTE

GSMLTE

GSM

pTRA

UpT

RAU

pTRA

UGT

P-U

GTP

-UGT

P-U

GTP

-UGT

P-U

UDP

IP

/

PPP

IP SW

Router

pTRAU Packetlized TRAU frame


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The GSM data and LTE data packed in the IP packets share the transmission resources on the S1 interface. LMPT can provide the multiplex interface for GSM and LTE . The multiplex interface could GE electrical or GE optical.

When the co-transmission is implemented on the S1 interface, the GSM data is switched to the LTE transmission board through the FE port on the GSM transmission board. The LTE transmission board multiplex the GSM data and LTE data and then transmits it on the shared GE transmission bandwidth on the transmission link. The following figure shows the co-transmission principles.

IP MW/PTN/IP MW/PTN/NGSDH/IP MPLSNGSDH/IP MPLS

MME/S-GW

BSC

IP over GE

2G BSC data

eNodeB integrate BTS data into IP over GE pipe

PTN/Router/LAN switch, router the traffic to MME/S-GW and BSC according to different VLAN or destination IP

IP over GE

LTE data

GSM BTS data

GTMU

LMPT

FE E1

GE/FE GE/FE

IP MW/PTN/IP MW/PTN/NGSDH/IP MPLSNGSDH/IP MPLS

MME/S-GW

BSC

IP over GE

2G BSC data

eNodeB integrate BTS data into IP over GE pipe

PTN/Router/LAN switch, router the traffic to MME/S-GW and BSC according to different VLAN or destination IP

IP over GE

LTE data

GSM BTS data

GTMU

LMPT

FE E1

GE/FE GE/FE

This scheme implements the co-transmission in IP mode between the MBTS and the router.

EnhancementSince SRAN7.0, dual-mode co-transmission based on UMPT is supported, GSM data is converged to UMPT(UMTS) or LMPT board, and then GL co-transmission, please see the below figure,

From SRAN7.0, IP-based co-transmission through backplane interconnection is recommended.

DependencyImpacts on the MBSC hardware

None


GSM and LTE base station should share the BBU to support this feature


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In SRAN7.0, UMPT or LMPT board is required.


GBFD-118601 Abis over IP


None


This feature has to be activated with MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side(GBTS) simultaneously

IP-based Dual-Mode Co-Transmission between NodeB and eNodeB

SummaryHuawei introduced the IP-based Dual-Mode Co-Transmission between NodeB and eNodeB function in SRAN5.0.

This function dynamically multiplexes NodeB and eNodeB data onto one transmission link, saving transmission equipment between the base station and routers. This function does not require adjustments to the transport network during evolution from UMTS to LTE.


Reduced investment in transmission equipment Fewer transmission resources and transmission costs Simplified transport network Smooth evolution from UMTS to LTE without adjusting the transport network

DescriptionThis function applies to the following sites:

Sites where MBTSs are used Sites where NodeBs and eNodeBs share cabinets

This function dynamically multiplexes NodeB and eNodeB data onto one transmission link. With different destination IP addresses, NodeB and eNodeB data can reach the RNC and MME/S-GW, respectively. The following figure shows the working principle of this function.


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NodeB and eNodeB share S1-interface transmission resources. The LMPT or UTRP provides a port for multiplexing NodeB and eNodeB data. The port can be an E1/T1 port, FE electrical port, FE optical port, GE electrical port, or GE optical port.

The following figure shows the implementation of co-transmission on the S1 interface. The WMPT and LMPT are interconnected through FE ports. The WMPT sends NodeB data to the LMPT through the FE port. The LMPT then multiplexes NodeB and eNodeB data onto one transmission link.

EnhancementIn SRAN6.0, IP-based dual-mode co-transmission between UMTS and TDD LTE on the base station side is supported.

In SRAN7.0, UMPT-based dual-mode co-transmission through backplane interconnection is supported. The UMPT (U) sends NodeB data to the UMPT (L) through the BBU backplane. The UMPT (L) then sends NodeB and eNodeB data to the transport network through a co-transmission port.

From SRAN7.0, IP-based co-transmission through backplane interconnection is recommended.

DependencyDependency on RNC/MBSC hardware

None

Dependency on NodeB/eNodeB/MBTS hardware

The UMTS and FDD LTE or the UMTS and TDD LTE sides of the base station must share the BBU.

The UMPT must be configured in SRAN7.0 and the LMPT must be configured in SRAN8.0.


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Dependency on other features

WRFD-050402 IP Transmission Introduction on Iub Interface


NA


This feature has to be activated with MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side(NodeB) simultaneously

IP-based Triple-Mode Co-Transmission Among BTS, NodeB, and eNodeB

SummaryHuawei introduced the IP-based Triple-Mode Co-Transmission Among BTS, NodeB, and eNodeB function in SRAN7.0.

This function dynamically multiplexes BTS, NodeB, and eNodeB data onto one transmission link, saving transmission equipment and simplifying the transport network.


Reduced investment in transmission equipment Fewer transmission resources required for the communication between the base station

and routers Simplified transport network Convenient network maintenance

DescriptionThis function applies to MBTSs.

This function dynamically multiplexes BTS, NodeB, and eNodeB data onto one transmission link. With different destination IP addresses, BTS, NodeB, and eNodeB data can reach the BSC, RNC, and MME/S-GW, respectively. The following figure shows the working principle of this function.


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The UMPT or UTRPc provides a port for multiplexing BTS, NodeB, and eNodeB data. The port can be an FE electrical port, FE optical port, GE electrical port, or GE optical port.

The following figure shows the implementation of triple-mode co-transmission on the Abis/Iub/S1 interface. The GTMU sends BTS data to the UCIU through the BBU backplane. The WMPT sends NodeB data to the UCIU, also through the BBU backplane. The UCIU then sends the data to the UMPT (L), which multiplexes the data of the three modes onto one transmission link.

In the preceding figure, a UTRPc can be installed in BBU 1. If a UTRPc is installed in BBU 1, the UCIU sends BTS and NodeB data to the UTRPc, and the UMPT (L) sends eNodeB data to the UTRPc. Upon receiving all the data, the UTRPc multiplexes the data onto one transmission link.

EnhancementNone.


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DependencyDependency on BSC/RNC/MBSC hardware

None

Dependency on BTS/NodeB/eNodeB/MBTS hardware

The UMPT or UTRPc must be configured


GBFD-118601 Abis over IP WRFD-050402 IP Transmission Introduction on Iub Interface


None

Dependency on other modes

This feature must be used together with the feature MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side (eNodeB) and MRFD-211501 IP-Based Multi-mode Co-Transmission on BS side (GBTS).

MRFD-231505 Bandwidth sharing of MBTS Multi-mode Co-Transmission(eNodeB)

AvailabilityThis feature is available from SRAN5.0.

Bandwidth Sharing of NodeB and eNodeB Co-Transmission

SummaryThis feature is applicable to scenarios of IP over FE/GE or IP over E1 co-transmission between UMTS and LTE of one MBTS.

In UMTS/LTE co-transmission, telecom operators uniformly manage the UMTS and LTE transmission resources by defining service priorities and assigning different bandwidth to services with different priorities. When congestion occurs, this feature maintains the continuity of high-priority services by allowing such services to dynamically share the total transmission resources.

If a base station with the maximum bandwidth of 4 Mbit/s automatically detects that congestion occurs at UMTS and LTE services, the base station reduces the rate of lower-priority services to allow high-priority services to dynamically share the bandwidth of 4 Mbit/s. In this way, the continuity of high-priority services is maintained.

BenefitsMBTS using co-transmission can ensure that UMTS and LTE dynamically share all the transmission resources with condition. In the case of transmission resource congestion in MBTS, UMTS and LTE high-priority services will be guaranteed. When the demand for UMTS services decreases or even becomes unnecessary, the bandwidth is gradually occupied by LTE services.


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DescriptionThere is a large margin for multiplexing transmission resources because peak load shifts between UMTS and LTE services. In this situation, operators can employ UMTS and LTE co-transmission to save transmission resources and adopt the transmission resource management algorithm to dynamically share bandwidth between UMTS and LTE services. This guarantees the continuity of high-priority services and prevents possible mutual effect between UMTS and LTE services.

This feature is applicable to scenarios of IP over FE/GE or IP over E1 co-transmission between UMTS and LTE of one MBTS.

This feature is applicable to the following scenarios:

Both the BSC/RNC or MBSC and the MBTS use FE/GE.

The BSC/RNC or MBSC uses FE/GE, while the MBTS uses IP over E1.

The UMTS and LTE service priorities are configured to indicate the priorities of the UMTS services or LTE services for occupying the transmission resources.

Operators can assign different priorities to UMTS and LTE services, for example, LTE signaling, LTE voice service, LTE high-priority data service, LTE low-priority data service, UMTS signaling, UMTS voice service, UMTS high-priority data service, and UMTS low-priority data service. Services with different priorities correspond to different Differentiated Services Code Point (DSCP) values.

Transmission policies are devised in such a way that the priorities of different systems and services are taken into consideration. If transmission congestion occurs at a node in the transport network, this node preferentially forwards data packets for high-priority services based on DSCP values.

On detecting transmission resource congestion, the MBTS will automatically reduce the bandwidth allocated to low-priority services based on the service priority policies to eliminate congestion. This ensures that the actual transmission bandwidth occupied by UMTS and LTE services in peak hours always approaches the bottleneck bandwidth.

EnhancementNone


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IP NetworkFE/GE/IP over E1

MME/SGW

RNCMBTS

FE/GE/IP over E1

FE/GE/IP over E1


DependencyDependency on LTE hardware

None


None

Dependency on other features of the eRAN

MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB)

MRFD-231501 IP-Based Multi-mode Co-Transmission on BS side (eNodeB)


This feature must be used together with the feature MRFD-221505 Bandwidth sharing of MBTS Multi-mode Co-Transmission (NodeB).

MRFD-231601 Multi-mode BS Common Reference Clock(eNodeB)

AvailabilityThis feature is available from SRAN5.0

GBTS and eNodeB Common Reference Clock

SummaryHuawei Multi-mode Base Station provides common reference clock of GSM and LTE when GSM and LTE co-BBU box from SRAN5.0. It can save the CAPEX and OPEX when GSM and LTE is deployed.

BenefitsIt is a cost-effective solution to provide common reference clock when the BTS works in GSM and LTE co-BBU solution.

DescriptionHuawei Multi-mode Base Station provides common reference clock of GSM and LTE when GSM and LTE co-BBU box. Following cases is supported:

Common GPS reference clock

For common GPS reference clock, only one set of external equipment is needed for GSM and LTE dual mode. And one set of external equipment is saved. Also one set of feeder and antenna is needed, the installation cost and deployment cost is saved accordingly.

Common BITS reference clock

For common BITS reference clock, only one set of external equipment is needed for GSM and LTE dual mode. And one set of external equipment is saved and the cost is saved


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accordingly.

Common E1/T1 reference clock from Abis interface

When GSM Abis interface is based on TDM of E1/T1, and LTE S1 interface is based on IP of FE/GE, LMPT can get the reference clock from the clock synchronized from the Abis E1/T1 in GTMU. Clock server is not necessary to be configured for LTE and the cost is saved accordingly.

Common E1/T1 reference clock from S1 interface

When GSM and LTE BTS sharing the same transmission interface based on IP over E1/T1 or hybrid transmission based on IP, GTMU can get the reference clock from the clock synchronized from the S1 E1/T1 in UTRP for LTE mode. Clock server is not necessary to be configured and the cost is saved accordingly. Clock server is not necessary to be configured for GSM and the cost is saved accordingly.

Common Ethernet reference clock from S1 interface

When common Ethernet reference clock is usedGSM can get the clock via BBU backplane from LMPT or UTRP.

Common IP network 1588V2 reference clock from S1 interface

When GSM and LTE BTS supporting 1588V2 reference clock, only one 1588V2 clock server and client is required, GSM can get the clock via BBU backplane from LMPT.

EnhancementNone

Dependency Impacts on the MBSC hardware

None


Common BBU or BBUs inter-connected is required.

Common GPS/BITS reference clock

BBU have to be configured with USCUUniversal satellite Card and Clock Unit board


IP Clock Server have to be configured.



MRFD-210501 BTS/NodeB Clock

GBFD-510401 BTS GPS Synchronization

LBFD-00300503 Synchronization with GPS




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LBFD-00300504 Synchronization with BITS


GBFD-118202 Synchronous Ethernet

LOFD-00301301 Synchronization with Ethernet(ITU-T G.8261)


GBFD-118620 Clock over IP Support 1588V2

LOFD-00301302 IEEE1588 V2 Clock Synchroniztion


None


This feature has to be activated with MRFD-211601 Multi-mode BS Common Reference Clock (GBTS) simultaneously

NodeB and eNodeB Common Reference Clock

SummaryHuawei Multi-mode Base Station provides common reference clock of UMTS and LTE when UMTS and LTE co-BBU box from SRAN5.0. It can save the CAPEX and OPEX when UMTS and LTE is deployed.

BenefitsIt is a cost-effective solution to provide common reference clock when the BTS works in UMTS and LTE co-BBU solution.

DescriptionHuawei Multi-mode Base Station provides common reference clock of UMTS and LTE when UMTS and LTE co-BBU box. Following cases is supported:


For common GPS reference clock, only one set of external equipment is needed for UMTS and LTE dual mode. And one set of external equipment is saved. Also one set of feeder and antenna is needed, the installation cost and deployment cost is saved accordingly.


For common BITS reference clock, only one set of external equipment is needed for UMTS and LTE dual mode. And one set of external equipment is saved and the cost is saved accordingly.

Common E1/T1 reference clock from Iub interface

When UMTS Iub interface is based on TDM of E1/T1, and LTE S1 interface is based on IP of GE, LMPT can get the reference clock from the clock synchronized from the Iub E1/T1 in WMPT or UTRP. Clock server is not necessary to be configured for UMTS and the cost is saved accordingly.


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When common Ethernet reference clock is usedUMTS can get the clock via BBU backplane from LMPT.


When UMTS and LTE BTS supporting 1588V2 reference clock, only one 1588V2 clock server and client is required, UMTS can get the clock via BBU backplane from LMPT.

EnhancementNone


NA


Common BBU or BBUs inter-connected is required.


BBU have to be configured with USCUUniversal satellite Card and Clock Unitboard


IP Clock Server has to be configured.









WRFD-050502 Synchronous Ethernet






NA



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This feature has to be activated with MRFD-221601 Multi-mode BS Common Reference Clock (NodeB) simultaneously

GBTS, NodeB and eNodeB Common Reference Clock

SummaryHuawei Multi-mode Base Station provides common reference clock of GSM, UMTS and LTE when GSM, UMTS and LTE under BBU inter-connected situation from SRAN7.0. It can save the CAPEX and OPEX when GSM, UMTS and LTE is deployed in one site.

BenefitsIt is a cost-effective solution to provide common reference clock when the BTS works in GSM, UMTS and LTE BBU inter-connected solution.

DescriptionHuawei Multi-mode Base Station provides common reference clock of GSM, UMTS and LTE when GSM, UMTS and LTE BBU inter-connected. Following cases is supported:


For common GPS reference clock, only one set of external equipment is needed for GSM, UMTS and LTE. One set of external equipment, one set of feeder and antenna are needed, the installation cost and deployment cost is saved accordingly.


For common BITS reference clock, only one set of external equipment is needed for GSM, UMTS and LTE. The cost is saved accordingly.

Common E1/T1 reference clock from Abis/Iub interface

When Abis/Iub interface is based on E1/T1, and LTE S1 interface is based on IP of GE, GSM/UMTS/LTE can get the reference clock from the clock synchronized from the Abis/Iub E1/T1.


When common Ethernet reference clock is usedGSM and UMTS can get the clock via BBU backplane from LTE UMPT.


When GSM, UMTS and LTE BTS supporting 1588V2 reference clock, only one 1588V2 clock server and client is required, GSM and UMTS can get the clock via BBU backplane from LTE UMPT.

EnhancementNone


NA


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BBUs of GSM, UMTS and LTE base station shall be inter-connected.


A BBU have to be configured with USCUUniversal satellite Card and Clock Unitboard


IP Clock Server has to be configured.




GBFD-510401 BTS GPS Synchronization






GBFD-118202 Synchronous Ethernet

WRFD-050502 Synchronous Ethernet



GBFD-118620 Clock over IP Support 1588V2

WRFD-050501 Clock Sync on Ethernet in Node B



NA


This feature has to be activated with MRFD-211601 Multi-mode BS Common Reference Clock (GBTS) and MRFD-221601 Multi-mode BS Common Reference Clock (NodeB) simultaneously

MRFD-231602 Multi-mode BS Common IPSec (LTE)AvailabilityThis feature is available from SRAN7.0.


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SummaryInternet Protocol Security (IPSec) tunnels are shared among GSM, UMTS, and LTE modes by using an UMPT board. This ensures security of data transmission.

BenefitsLicense fee is calculated based on the number of established IPSec tunnels. Therefore, sharing IPSec tunnels helps reduce the operator's security cost.

Sharing IPSec tunnels cuts the number of IP addresses required, reducing the complexity of deploying security networks.

DescriptionIPSec ensures confidentiality, integrity, and usability of transmission. It provides a security mechanism for base stations in all-IP transmission. IPSec provides security services for the IP layer, and therefore the upper layers, including TCP, UDP, ICMP, and SCTP, can use the security services.

IPSec is a protocol suite for securing IP communications. It provides high-quality, interoperable, and cryptography-based security for IP packet transmission. Communication parties ensure the following security characteristics of data transmission on the network by encrypting and authenticating IP packets:

Confidentiality: User data is encrypted and transmitted in cipher text.

Integrity: The received data is verified to check whether data has been tampered with.

Authentication: Data is verified to confirm the sender of the data.

Anti-replay: The main goal of anti-replay is to prevent malicious attackers from repeatedly sending captured packets. The receiver will reject duplicate packets.

Internet Protocol Security (IPSec) tunnels are shared among GSM, UMTS, and LTE modes by using an UMPT board. This ensures security of data transmission.

EnhancementNone


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DependencyDependency on MBSC hardware

None

Dependency on MBTS hardware

UMPT or UTRPc


MRFD-221501 IP-Based Multi-mode Co-Transmission on BS side (NodeB)

One mode of multi-mode shall support IPSec feature (GBFD-113524 BTS Integrated IPsecWRFD-140209 NodeB Integrated IPSecLOFD-003009 IPsec)


None


This feature must be used together with one of features MRFD-211602 Multi-mode BS Common IPSec (GSM) and MRFD-231602 Multi-mode BS Common IPSec (LTE), or both.

Easy RefarmingMRFD-231806 GSM and LTE Dynamic Power Sharing(LTE)AvailabilityThis feature is available from SRAN8.0.

SummaryGSM and LTE carriers in an MBTS can share one power amplifier (PA). If the busy hours of GSM and LTE carriers sharing one PA fall in different periods of a day or if traffic is not evenly distributed between the GSM and LTE carriers, this feature allocates the unused power of GSM carriers to LTE carriers during GSM off-peak hours to improve the service performance of LTE CEUs. When GSM peak hours arrive or there is GSM burst traffic, GSM reclaims the power to ensure its service quality.

BenefitsIf each PA provides 5W shareable power and the LTE bandwidth is 20 MHz, simulation results are as follows:

In rural areas using the 850 MHz frequency band, this feature increases the throughput for about 30% of LTE users and increases the throughput of CEUs by about 12%.

In urban areas using the 1800 MHz frequency band, this feature increases the throughput for about 45% of LTE users and increases the throughput of CEUs by about 15%.

However, this feature decreases the average throughput of LTE cells by less than 2%.


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DescriptionAccording to field test results and simulation results, LTE CEUs experience low throughput. Therefore, improving the performance of LTE CEUs is significant.

During GSM off-peak hours, the unused power of GSM carriers is allocated to LTE carriers, and LTE carriers allocate the power to CEUs. This feature improves the performance of these UEs by increasing the throughput of these UEs. However, it also decreases the average throughput of LTE cells. The pilot power of LTE cells remains the same. When GSM busy hours arrive or there is GSM burst traffic, the shared power is reclaimed to ensure GSM service performance.

GSM and LTE power sharing

This feature applies to scenarios where GSM and LTE carriers share one PA.

This feature requires the following configurations:

LTE carriers must be configured with two transmit channels and two receive channels. Each GSM cell must be configured with at least three carriers, and each PA must be

configured with at least one non-BCCH GSM carrier.

EnhancementNone


None


All GL dual-mode RF units with two transmissions, or

Two combined GL dual-mode RF units with one transmission


None


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None


This feature has to be activated with MRFD-211806 GSM and LTE Dynamic Power Sharing (GSM) simultaneously

MRFD-231808 GSM and LTE Buffer Zone Optimization(LTE)AvailabilityThis feature is available from SRAN8.0.

SummaryIf this feature is enabled in an LTE cell, the spectrum used by this cell can partially overlap with the spectrum used by neighboring GSM cells, and some UEs in the LTE cell can occupy the overlapping spectrum. This improves the spectrum usage and cell throughput. You can determine whether to enable this feature in an LTE cell according to the highest received signal strength indicator (RSSI) of neighboring GSM cells' broadcast control channels (BCCHs) and the reference signal received power (RSRP) measured by LTE cell edge users (CEUs).

BenefitsThis feature allocates additional frequency resources to LTE cells in the GSM/LTE buffer zone, increasing the throughput of those LTE cells and improving the spectrum usage. Simulation results show that this feature increases the uplink throughput by 20% and downlink throughput by 16% for LTE cells if:

All base stations are evenly distributed with a distance of 300 m between each other. The transmit power of GSM cells and LTE cells are 40 W and 2x20 W, respectively. LTE carriers use the 20 MHz bandwidth, and GSM signals cause interference to 16 LTE

resource block (RBs).

DescriptionIn this era of mobile broadband, some operators directly evolve their GSM networks to LTE networks. At the initial stage of evolution from GSM to LTE, GSM network load is still high, but GL refarming allocates part of the GSM spectrum resources to LTE. As a result, the remaining GSM spectrum becomes insufficient to carry the heavy traffic of GSM services. A conflict for spectrum resources occurs between GSM and LTE carriers.

To solve this problem, a buffer zone is established around each hot spot area. Traditionally, the GSM frequencies in a buffer zone will not be used by LTE or any other mode. This wastes spectrum resources.

To address this issue, Huawei introduces the GL Buffer Zone Optimization feature based on operators' requirements and the characteristics of GSM and LTE. According to the dynamic measurement results from UEs in an LTE cell in the GL buffer zone, you can determine


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whether these LTE UEs are affected by GSM interference and whether to enable this feature in this LTE cell. If this feature is enabled in an LTE cell, the spectrum of this cell can overlap with the spectrum of neighboring GSM cells. This increases the bandwidth and throughput of the LTE cell.

For example, assume that an operator has a 20 MHz spectrum, on which GL refarming is applied. In hot spot areas, 3.6 MHz out of the 20 MHz spectrum must be exclusively allocated to GSM. In addition, a buffer zone is established around each hot spot area to avoid interference between GSM and LTE. Traditionally, LTE cells in the buffer zone can use only a 15 MHz spectrum and the remaining 5 MHz spectrum can be used only by GSM, wasting spectrum resources. This feature enables some LTE cells in the buffer zone to use the entire 20 MHz spectrum, increasing the throughput of the LTE cells.

Traditional spectrum reallocation

Comparison between traditional and enhanced spectrum reallocation

This feature applies to densely populated urban areas. During feature deployment, some spectrum resources must be reserved for GSM.


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You must purchase professional services from Huawei so that Huawei can help you determine which LTE cells in a GL buffer zone can use overlapping spectrum resources with GSM cells in the hot spot areas.

EnhancementNone


None


None


LOFD-001093 PUCCH Flexible Configuration


None


This feature has to be activated with MRFD-211808 GSM and LTE Buffer Zone Optimization (GSM) simultaneously

Power Consumption Saving1.1.1 MRFD-231901 Multi-RAT Carrier Joint Shutdown (eNodeB)Availability

This feature is available from SRAN8.0.

LTE Cell Joint Shutdown in UL Scenarios

SummaryIn an overlapping coverage area covered by UMTS and LTE base stations, LTE cells can be intelligently shut down or restarted based on traffic volume. During low-traffic hours, LTE cells are shut down and UMTS cells provide services for all UEs in the area. When the traffic volume on the UMTS network increases, LTE cells are restarted to handle the increased traffic.

BenefitsBy intelligently shutting down LTE cells during low-traffic hours, this feature reduces the overall power consumption of the UMTS and LTE networks. This conserves energy, reduces emissions, and reduces the OPEX. The total amount of power saved by this feature depends


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on factors such as the RF unit type and load distribution mode. For example, this feature reduces the average power consumption of the LTE network by about 5% to 8% a day under the following conditions:

The load distribution mode is idle (8 hours)+medium load (12 hours)+high load (4 hours).

LTE cells are shut down for eight hours.

DescriptionWhen UMTS and LTE base stations cover the same area, the two base stations can either use different RF units or share the same RF units but use different RF channels. During low-traffic hours, LTE cells are shut down by shutting down related hardware modules to reduce power consumption. After LTE cells are shut down, UMTS cells provide services for all UEs in the area.

The eNodeB determines whether an LTE cell should be shut down based on the following factors:

Cell intelligent shutdown periods Status of upper-layer cells Number of online UEs Load of the LTE cell Number of UEs supporting only LTE Load of the co-coverage UMTS cells

This feature is recommended for either of the following scenarios:

The LTE network is initially deployed, the penetration rate of LTE services is low, or traffic volumes are extremely unbalanced at different times in a day. Examples include urban areas, such as shopping malls, office buildings, and stadiums.

The LTE network provides basic coverage, the penetration rates of LTE-capable UEs and LTE services are both low, and the traffic is low for a long period during a day. For example, rural areas.

The eNodeB obtains the load of the co-coverage UMTS cells from the RNC by using the RAN information management (RIM) procedure.

If an LTE cell meets the shutdown conditions, the eNodeB hands over UEs in the connected state in the LTE cell or reselects the UEs to its co-coverage UMTS cells and then shuts down the LTE cell. When the cell shutdown period ends or the RNC informs the eNodeB that the load of the co-coverage UMTS cells has increased, the eNodeB restarts the LTE cell.


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EnhancementNone

DependencyDependency on RNC/MBSC hardware

The RNC and MBSC must be purchased from Huawei.

Dependency on NodeB/eNodeB/MBTS hardware

The eNodeB must be purchased from Huawei.


If there are multiple LTE cells in an overlapping coverage area, this feature must be enabled together with the LOFD-001042 Intelligent Power-Off of Carriers in the Same Coverage feature.

This feature cannot be enabled together with the LOFD-001074 Intelligent Power-Off of Carriers in the Coverage of GSM/UMTS Network feature.


None

Dependency on UEs

UEs on the LTE network must support both UMTS and LTE, and support LTE-to-UMTS handovers and redirections.

Dependency on the CN

The serving GPRS support node (SGSN) and mobility management entity (MME) must support the RIM procedure between the UMTS and LTE.


This feature must be enabled together with the MRFD-221901 Multi-RAT Carrier Joint Intelligent Shutdown (NodeB) feature.


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This feature cannot be enabled in GU and UL scenarios at the same time.

Acronyms and Abbreviations

Acronyms and abbreviations:


Expansion

E Enhanced feature

M Maintenance (No change)

N New added feature

3G 3 rd Generation Mobile Communication System

3GPP 3rd Generation Partnership Project

AMR Adaptive Multi-Rate

Abis Abis Interface

BBU Baseband Control Unit

BSC Base Station Controller

CME Control Management Entity

CN Core Network

FE Fast Ethernet

GE Gigabit Ethernet

GERAN GSM/EDGE Radio Access Network

GSM Global System For Mobile Communication

HCS Hierarchical Cell Structure

LDR Load Reshuffling

LMPT LTE Main Processing Transmission unit

Iub Iub Interface


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Expansion

LTE Long Term Evolution

MIMO Multi-Input Multi-Output

NACC Network Assisted Cell Change

PHB Per-Hop-Behavior

QoS Quality of Service

RAB Radio Access Bearer

RAN Radio Access Network

RIM Radio Information Manager

RNC WCDMA Radio Network Controller

RRC Radio Resource Connection

SGSN Serving GPRS Support Node

SRAN Single Radio Access Network

TDM Time Division Multiple Access

UMTS Universal Mobile Telecommunications System

UE User Equipment

WCDMA Wideband CDMA

WMPT WCDMA Main Processing Transmission unit


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185724241 sran8 0 lte multi mode feature description 01 20130218

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