4.4.4 Node B Different RABs Calculation

Node B different RABs calculation

BSNL 14.37 million Lines project


ZTE Confidential Proprietary 1

Node B different RABs calculation_

Version Date Author Reviewer Notes

V1.0 2011/7/9 ZTE Not open to the third party

© 2011 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used

without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to

change without notice.


2 ZTE Confidential Proprietary

TABLE OF CONTENTS

1 ZTE BP board Processing Capacity ................................................................. 3

2 Requirements of project bid ............................................................................. 4

2.1 UMTS service type ............................................................................................... 4

2.2 SDR Node B different RABs calculation ............................................................... 5

2.2.1 SDR Node B RABs CE consumption ................................................................... 5

2.2.2 SDR Node B Different RABs calculation .............................................................. 6



1 ZTE BP board Processing Capacity

BP board resource is very important in a Node B. Since BP board processing capacity finally

determines the cost of Node B equipment, operators and equipment vendors pay much

concern on this issue.

Baseband pool may be configured among BP boards so as to achieve capacity-sharing.

According to different type of service and scenario, BP board resources shall be analyzed to

locate common bottleneck from various resources. Finally, an uplink/downlink independent

management model is extracted.

To easily understand and manage the resource model, a resource unit, called CE (Channel

Element), is defined as an amount of resource occupied by processing 12.2k service. CE

belongs to a logical concept, not physical attribute.

ZTE SDR Node B baseband boards (BPK) have reserved CE resource for command

channels (CCCH/BCH/PICH...), Signaling channels (DCCH), resources required for soft

handover (DCH), so these channels don’t occupancy CE resource.

ZTE BP board process capability

Traffic Type User Number/throughput

BPK

12.2k 384/384(UL/DL)

HSDPA 130Mbps

HSUPA 35Mbps

According to requirements of this project bid, ZTE SDR Node B BP board meets bid

requirements, even traffic model of Dense Urban & Urban environments.



Channel elements for traffic = 384

Sufficient capacity is reserved for the following categories.

Reserved Channel elements over and above usable CEs for traffic (i.e. 384):

Uplink Downlink

Soft handover 20% 20%

Softer handover Doesn't need any channel elements

Common control channels Based on traffic sufficient resources are reserved automatically

over and above usable traffic CEs.

Enhance uplink 96 CEs none

HSDPA NA Do not use channel elements

for HSDPA traffic

2 Requirements of project bid

2.1 UMTS service type

From the bid document “Tender No.: CA/CM/GSM-Ph VII/T-404A/2011-12

issued on 14/07/2011”,the service type can be asked from the document like

below table.



2.2 SDR Node B different RABs calculation

2.2.1 SDR Node B RABs CE consumption

ZTE Node B baseband process the code resource and CE resource. The CE consumption

results are different if the service portfolios are different. Below table 0shows ZTE Node B CE

resource consumption by different type of service.

Table 2-1 Resource consumption by different type of service on ZTE BP board

Service Type Uplink CE

Consumption

Downlink CE

Consumption

R99

AMR 12.2 kbps 1 1

CS64 kbps 2.5 1.8

PS64 kbps 2.5 1.8

PS128 kbps 5 3

PS384 kbps 10 6

HSDPA

Uplink R99 DCH Bear Rate

0.3* 16k 1.3

32k 2

64k 2.5



128k 5

384k 10

Service Data

HSUPA

SF64 12~17.2kbps 2

0.3*

SF32 18.6~37.2kbps 3.3

SF16 52.2~70.8 kbps 4

SF8 85.8~154.8 kbps 4.8

1*SF4 169.8~711 kbps 5.7

2*SF4 742.8~1448.4 kbps 11

2*SF2 1455.6~2883 kbps 28

2*SF2+2*SF4 2970~5742

kbps/11.5Mbps 32

Notes: * means if use SRB over HSDPA, this value is 0.

2.2.2 SDR Node B Different RABs calculation

From “2.1 service type”, BSNL define 6 server types, one service corresponds to

one RAB type that should be defined in HLR. So we can get the 6 server type,

also data throughput. As the below table:

application Radio Access

Bearer

Uplink

(CE/kbps)

Downlink

(CE/kbps) Throughput(kbps)

Speech C_CO_UL12.2_DL

12.2 1/12.2 1/12.2 24.4

Video C_CO_UL64_DL64 2.5/64 1.8/64 128

Basic

Browsing P_IB_UL64_DL64 2.5/64 1.8/64 128

Audio

streaming P_IB_UL64_DL128 2.5/64 3/128 192

Video

streaming P_IB_UL64_DL384 2.5/64 6/384 448

HSDPA ALL HSPA&HSPA+

42.2Mbps DL 1.3 0.3/42200 42200

HUSPA ALL HSPA&HSPA+

11.5 Mbps UL 32/11500

0.3/associa

ted DCH 11500

4.4.4 Node B Different RABs Calculation

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