Upload
gageloz
View
217
Download
0
Embed Size (px)
Citation preview
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 1/23
www.huawei.com
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Cell Data
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 2/23
Page2Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Cell Data Function Cell data includes:
Basic Property
Cell extension
Timer
Interference Band
Immediate Assignment Parameters
Call Control and Processing Parameters
The cell data needs to be configured in a proper way so that
the network can perform at the optimum level with occupyingminimum resources.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 3/23
Page3Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Basic Property Basic property
SACCH Multi-Frames
Paging Times
Max TA
Max resend times of Phy. Info.
T3105
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 4/23
Page4Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
SACCH Multi-Frames Range:0~63
Unit: SACCH period (480ms)
Default:14
Description: It is a timer used to determine whether the uplink radio link
connection fails. BSS judges the uplink radio link failure according to
uplink SACCH BER. (See Protocol 0508, 0858, and 0408.) Every time
BTS fails to decode the MR sent from MS, this timer decreases by 1; and
every time BTS succeeds to decode the MR, this timer increases by 2.
When this timer reaches 0, BTS judges that the uplink radio connection
fails. Then BTS sends a radio connection failure message to BSC. This
parameter and the radio link timeout (RLT) are used to judge the
uplink/downlink radio connection failure.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 5/23
Page5Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Paging Times Range:1~8(BTS3X)
Unit: times Default:1
Description: This parameter is used for BTS to determine whether
paging is resent. Together with the paging times configured in
MSC, they jointly control the paging resend times. The total
paging times are approximate to be the multiplication of the two.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 6/23
Page6Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Max TA Range:
0~63 (Normal cell).
0~255 (Dual TS extended cell).
Unit: bit period (1 bit = 0.55km)
Default:
62 for normal cell, 219 for dual TS extended cell.
Description: Maximum Time Advance. It determines the actual
coverage area of BTS. When BTS receives the channel request
message, it determines whether channel assignment should take place
in the current cell by comparing the TA with the value of this parameter.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 7/23
Page7Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Max Resend Times of Phy. Info. Range:1–255
Unit: times
Default:30
Description: This parameter specifies the maximum times Ny1
for re-sending physical information. If the number of resending
times exceeds Ny1 and BTS still has not received any correct
SAMB frame from MS, BTS will send BSC the connection
failure message and handover failure message. After BSC
receives the messages, it will release the assigned dedicatedchannel and stop timer T3105.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 8/23
Page8Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
T3105 Range:0–255
Unit:10 ms
Default:7
Description:T3105 is a timer for radio connection. See the
description of Max resend times of Phy. Info.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 9/23
Page9Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Cell Extension Cell extension
Cell Extension Type
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 10/23
Page10Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Cell Extension Type Range: Normal cell, Dual timeslot extended cell
Default: Normal cell
Description: It indicates whether a cell is an extended cell
and the extended cell mode.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 11/23
Page11Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Timer Timer
T200
N200
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 12/23
Page12Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
T200 and N200 Description:
T200 timers are used to avoid deadlock during data transfer on the data link
layer.
On the LAPDm layer, every time a message is sent, the opposite end is
requested to acknowledge the reception. If this message is lost for unknown
reasons, it will occur that both ends keep waiting, leading to system deadlock.
Therefore, a timer should be started when the sender sends a message. If the
timer times out, the sender will regard that the receiver has not received the
message and will resend the message.
The maximum resend times are determined by N200.
Different timer values should be set for different LAPDm channels such as
SDCCH, FACCH and SACCH. This is because these channels have different
transmission rate.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 13/23
Page13Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Use LAPDm N200 Range: Yes, No
Default: No
Description: Determines whether BSC delivers LAPDm
N200 parameters to BTS. If it configured as Yes, then
LPADm N200 parameters will be delivered to BTS,
otherwise not.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 14/23
Page14Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Interference Band Interference band
Interference Band Threshhold
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 15/23
Page15Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Interference Band Threshold 0~5 Value range: 110~85
Unit: -dBm
Content: It decides the corresponding value for each interference
band (from band 0 to band 5) and used to measure the uplink
interference during the TCH timeslot is in idle mode.
Recommended values: 110 ( Interference band threshold 0)
105 ( Interference band threshold 1)
98 ( Interference band threshold 2 )
90 ( Interference band threshold 3 )
87 ( Interference band threshold 4 )
85 ( Interference band threshold 5)
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 16/23
Page16Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Call Control and Processing Parameters Call control and processing parameters are in Cell Call
Control Table and Cell Call Control Parameter Table
TCH immediate assignment
Immediate assignment optimization
Direct Retry
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 17/23
Page17Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
TCH Immediate Assignment Range: Yes, No
Default: No
Description: Option "Yes" means that TCH channel can be
immediately assigned as signaling and traffic channel when
SDCCH has no available resource. The option "No" means
that only SDCCH can be assigned.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 18/23
Page18Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Immediate Assignment Optimization Range: Yes, No
Default: No
Description: Option "Yes" means it is allowed to optimize
assignment of channels activated by BTS when there are
multiple MS access requests. This is to guarantee network
response speed.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 19/23
Page19Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Direct Retry Range: Yes, No
Default: Yes
Description: the switch to control direct retry is
enabled or not.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 20/23
Page20Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Assignment Cell Load Judge Enabled Range: Yes, No
Default: Yes
Description: When the Assignment Cell Load Judge
Enabled is set to Yes, the direct try flow is allowed if
the following two conditions are met:
The cell supports the direct try function.
The load of the cell is larger than or equal to the
Cell Direct Try Forbidden Threshold.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 21/23
Page21Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Cell Direct Try Forbidden Threshold Range: 0–6
Default: 5
Description: If the parameter Assignment Cell Load
Judge Enabled is set to Yes, the direct retry process
is started and channels are assigned when the cell
supports direct retry and the load of the current cell is
equal to or greater than the value of Cell Direct Try
Forbidden Threshold during channel assignment.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 22/23
Page22Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
Directed Retry Load Access Threshold Range: 0–6
Default: 5
Description: This parameter is used to adjust the
candidate target cells during direct retry.When target
cells are selected during direct retry, only the cells
whose loads are smaller than or equal to the Directed
Retry Load Access Threshold are selected as candidate
target cells.
8/14/2019 Microsoft Power Point - 3 OMF010004 Cell Data ISSUE1
http://slidepdf.com/reader/full/microsoft-power-point-3-omf010004-cell-data-issue1 23/23
Thank youwww.huawei.com