Incrementar la notoriedad de Los Tréboles, extendiendo su zona de acción, para

6. Plan de Comunicación Corporativa

6.4. Plan de acción: tácticas y herramientas de comunicación

6.4.4. Incrementar la notoriedad de Los Tréboles, extendiendo su zona de acción, para

Step 1 (Optional) According to section 4.3.1 "Requisites for Reaching HSUPA Maximum Rate,"

check whether the path for SRB over HSUPA is available when the target data rate is 5.74 Mbit/s.

Checking path according to section 3.5.1 "Troubleshooting Abnormal AAL2PATH or IPPATH."

 If yes, go to Step 2.

 Otherwise, if the problem is solved, troubleshooting ends; if not, go to Step 2.

Step 2 Check whether the service is set up on the EDCH.

Check the cn-DomainIdentity, rb-Identity, and ul-LogicalChannelMappings information elements (IE) in the RRC_RB message:

 If the value of cn-DomainIdentity is ps-domain and the value of ul-TrCH-Type under this rb is edch when the value of rb-Identity is greater than 4, as shown in the Figure 4-3, the PS service is set up on the EDCH. Go to Step 3.

 Otherwise, go to chapter 3 "Troubleshooting HSPA Service Setup Failures."

38 Figure 4-3 IEs of the RRC RB SETUP message

Step 3 Check whether the assigned maximum rate is greater than the required rate.

Check the MaxBitRate IE in the RANAP_RAB_ASSIGNMENT_REQ message to determine whether the maximum uplink bit rate assigned by the CN is greater than the required rate.

 If yes, go to Step 4.

 If no, ask the CN side to solve the problem by checking USIM card subscription information.

Figure 4-4 Service type and maximum bit rate information in RANAP_RAB_ASSIGNMENT_REQ message

Step 4 Check whether the UE supports the required rate.

View the edch-PhysicalLayerCategory IE in the RRC_CONNECT_SETUP_CMP message as shown in Figure 4-5 and then determine whether the value of Max.Data Rate corresponding to the UE capability based on Figure 4-1 HSUPA supporting capabilities of UEs is greater than the required rate.

 If yes, go to Step 5.

 Otherwise, the UE does not support the rate. Change another UE. If the problem is solved,, the troubleshooting ends; if not, go to Step 8.

40 Figure 4-5 The UE Capacity information in RRC_CONNECT_SETUP_CMP message

Step 5 Check whether uplink CE resources are insufficient.

Start Cell Performance Monitoring, set Monitor Item to Cell CE, and check whether the value of UL Local Cell Group Total CE Used or UL NodeB Total CE Used is close to that of UL Local Cell Group Total CE or UL NodeB Total Cell as shown in Figure 4-6.

 If yes, insufficient CE resources can be determined as the problem. The troubleshooting ends.

 If no, go to step 6.

Figure 4-6 Checking cell CE on the RNC

Step 6 Check whether the UE transmit power is limited.

Start Connection Performance Monitoring, and set Monitor Item to UE Tx Power.

 If the tracking result shows that the UE transmit power often reaches 20 dBm, the air interface is of poor uplink quality, and the UE transmit power is close to the maximum value (typically 24 dBm), resulting in a low HSUPA rate. It is recommended that you observe the transmit power in areas with good coverage (RSCP > -90 dBm). The troubleshooting ends.

 If the transmit power hardly reaches 20 dBm, go to Step 7.

Step 7 Check for changes in the uplink bandwidth assigned by the RNC.

Start Connection Performance Monitoring, set Monitor Item to UL Throughput Bandwidth.

 If the uplink bandwidth assigned by the RNC decreases, view the signaling to check whether the UE is handed over to a cell with a different HSUPA supporting capability (for example, the UE is handed over from a cell that supports 5.76 Mbit/s to a cell that only supports 1.44 Mbit/s).If yes, modify the neighboring cells and check again.

 If no, go to Step 8.

Step 8 Contact Huawei.

4.4.4 Typical Cases

Fault Description

In office L in country C, the HSUPA rate stays around 600 kbit/s at some sites and reaches a maximum of 608 kbit/s, unable to reach the bandwidth of 5.4 Mbit/s.

Possible Causes

42 As the path for SRB over HSUPA has not been set, the service cannot be set up at the 5.4 Mbit/s rate.

Fault Handling

Check whether the configuration meets the following requirements:

1. Typical services at the uplink rate of 5.44 Mbit/s have been configured.

2. The SRB over HSPA function is enabled on the RNC.

In the SET UFRCCHLTYPEPARA command, SRBCHLTYPE is set to HSPA.

3. For the HSUPA rate, 64 kbit/s, 384 kbit/s, 608 kbit/s and 5.44 Mbit/s are used.

In SET EDCHRATEADJUSTSET, RATE_64KBPS, RATE_384KBPS, RATE_608KBPS, and 5.44 Mbit/s are selected.

4. The site uses the transmission mapping table of 66. In the transmission mapping table, the AAL2 path of RT_VBR is set to carry SRB over HSUPA data.

5. Check whether the TRFX of RTVBR is 140.

6. Check whether the AAL2 path type is R99 when TRFX is 140. If yes, HSPA services cannot be carried.

Location Result

As the path for SRBoverHSUPA is not set, the service cannot be set up at 5.44 Mbit/s.

Solution

Modify path attributes to allow the path for SRBoverHSUPA to carry HSPA services. The problem is solved.

MOD AAL2PATH: ANI=23, PATHID=1, AAL2PATHT=SHARE;

MOD AAL2PATH: ANI=23, PATHID=2, AAL2PATHT=SHARE;

MOD AAL2PATH: ANI=23, PATHID=3, AAL2PATHT=SHARE;

MOD AAL2PATH: ANI=23, PATHID=2, AAL2PATHT=SHARE;

MOD AAL2PATH: ANI=23, PATHID=3, AAL2PATHT=SHARE;

5 Troubleshooting HSDPA Service Rate Faults

5.1 About This Chapter

This chapter describes how to locate abnormalities in the rate of the HSDPA service in the PS domain.

In document Programa de Comunicación Corporativa para Centro Educativo Los Tréboles (página 171-180)