Capacity – Radio Access Bearer:

RAB capacity is measured according to the number of Channel Elements (CE).

In 2009 3 G plan Node B Capacity will start with 128 CE were designed is composed of 1xD-BBU for 128 CE for R99 + H-BBU 64 for HSDPA

The RAB/CE mapping table presents the CE cost per the commonly used Radio Bearers (not shown are the Common channels required per cell)

Normal speech call the number of CE required is 1 CE, for CS64 Calls (Video) number of CE require 4, for PS64/348 the number of CE 8.

Subscriber Inputs Profiles:

Year 1 Sub values

Comment

Speech [mErl] 17mErl Aligned with Investment Review IR2 2008; assumed to be the same as GSM Voice

CS64 [mErl] 0.1 mErl This is Circuit Switch for i.e. Video Calls between two Mobiles. PS data R99 [kB/BH]

40 Assumed value depends as well on the HSDPA / R99 Terminal distribution.

HSDPA [kB/BH]

20 Assumed value depends as well on the HSDPA / R99 Terminal distribution.

 Calculate a max nb a customer/cell for considering: HSDPA at 1,8mbps All cell configured the same

             A: Node B Specifications as per Budget 2009:     

1xD-BBU for 128 CE for R99 & Voice + H-BBU 64 CE for HSDPA

Numbers of subscribers a Node B can simultaneously accommodate on normal Speech (12.2kbps).

CE requirement for normal calls is 1.3 CE with Soft Handover taken into considerations and 13.5 CE reserved for common channels(128-13.5)/1.3 = 88 Calls, therefore 88 subs can access simultaneously Node B site which means about 29 subs per sector. Given each sub generates 17mErl, i.e. MHT is 61.2 sec therefore number calls each sub will generate is 3600/61.2 = 58 Calls hence Node B can carry 58x88 = 5104 calls.

Numbers of subscribers a Node B can simultaneously accommodate on CS 64 (64/64kbps).

CE requirement for CS 64 calls is 4 CE without Soft Handover taken into considerations and 13.5 CE reserved for common channels

(128-13.5)/4 = 28 Calls, therefore 28 subs can access simultaneously Node B site which means about 9 subs per sector. Numbers of subscribers a Node B can simultaneously accommodate on CS 64 (64/384kbps).

CE requirement for PS R99 64/384kbps calls is 8 CE without Soft Handover taken into considerations and 13.5 CE reserved for common channels(128-13.5)/8 = 14 PS R99 Calls, therefore 14 subs can access simultaneously Node B site which means about 4 subs per sector.

Numbers of subscribers a Node B can simultaneously accommodate on HSDPA (1.8Mbps).

With 3E1, number of Subs which can access 1.8Mbps HSDPA is 3Subs, which means about 1 sub per sector:

Summary:- Type Calls Number of Subs Access

simultaneously per SectorRemarks

Speech (12.2/12.2Kbps) 29 SHO taken into accountCS64 (64/64Kbps) 9 SHO not taken into accountPS data R99 [64/384kbps] 4 SHO not taken into accountHSDPA [1.8Mbps] 1 SHO not taken into account

B: For 3G Trial:-Alcatel – Node B config 1xD-BBU for 64 CE for R99 & Voice + H-BBU 64CE for HSDPA

Type Calls Number of Subs Access simultaneously per Sector

Remarks

Speech (12.2/12.2Kbps) 13 SHO taken into accountCS64 (64/64Kbps) 4 SHO not taken into accountPS data R99 [64/384kbps] 2 SHO not taken into accountHSDPA [1.8Mbps] 1 SHO not taken into account

C: For 3G Trial:-

Ericsson – Node B config 32 CE for R99 & Voice + H-BBU 64 CE for HSDPA

Type Calls Number of Subs Access simultaneously per Sector

Remarks

Speech (12.2/12.2Kbps) 6 SHO taken into accountCS64 (64/64Kbps) 2 SHO not taken into accountPS data R99 [64/384kbps] 1 SHO not taken into accountHSDPA [1.8Mbps] 1 SHO not taken into account

* According to Trial agreements.