haryarin
2011-10-18, 05:29 PM
1)TXPOWER
2)RXPOWER
3)Ec/Io
4)TXADJ
5)FER.
1.EcIo
EcIo reflects the handset in the current received pilot signal level. This is an integrated pilot signal. Why, because mobile phones are a multi-channel soft switching, which translates into mobile phones often lies in more than one pilot overlapping coverage area, the level of the phone, EcIo reflects the phone at this point that a multi-channel pilot signal level of the overall coverage. We know that the Ec is a mobile phone available pilot signal strength, and Io is the mobile phone receives all the strength of the signal. Therefore, EcIo reflects the available signal strength in occupies all signals. The higher the value, the greater the proportion of a useful signal, on the other hand also reversed. At some point EcIo big, there are two possibilities. First, the Ec is very large, dominant level here, Ec, Io is very small, that is to say here is from another base station's messy little pilot signal, EcIo also larger. In the latter case is weak, because the Ec small, Io is also small, so small, so RSSI also there may be dropped. At some point EcIo also small, there are two possible, first, the Ec is also small small RSSI, this is the weak coverage area. The Ec is not small, RSSI, this illustrates the Io is the overall intensity of the signal is not bad. This situation is often a BSC switch data configuration, no nearby strong pilot signal into the adjacent community table, so the phone doesn't recognize the strong pilot signal in the vicinity as a jamming signal processing. On the road, in the case of a typical phenomenon is the phone in a move to maintain certain RSSI, EcIo level, rapid rise to FER and eventually dropped.
2 TXPOWER
TXPOWER is the phone's transmitter power. We know that power control is guaranteed call quality and address the CDMA
community interference tolerance and one of the key means of mobile phone from the base station near, uplink quality
good, the mobile phone transmitting power is smaller, because at the base station is able to guarantee the reception of the signal to launch mobile phone and fer also small and mobile phones transmitting power is smaller to other mobile phones in the community is also a small interference. So mobile phones transmit power level, reflecting the handset's current uplink loss and interference. Uplink loss of large, or there is serious interference with the phone's transmitter power will be greatly missed mobile phone transmitting power is smaller. Roadtest, in normal circumstances, the more closer to the base station or Repeater, the mobile phone transmitting power is reduced, away from the base station and Repeater, the mobile phone transmitting power increases. If the base station and Repeater nearby mobile phone transmitting power, obviously it is not normal. Perhaps there is interference, the uplink can be a base station and Repeater itself. Such as community antenna wrong receive carrier frequency amplifier circuit problems, etc. If the Repeater nearby, cell phone transmitter power, it may be a Repeater malfunctions, uplink gain set too small, and so on.Above you can see, the road of TXPOWER level reflects the base station coverage area of reverse link quality and uplink interference levels.
3RXPOWER
RXPOWER is a mobile phone to receive power. In CDMA, according to my personal understanding, there are three parameters is very close by, you can almost equivalent to the use of parameters. Namely RXPOWER, RSSI, Io. RXPOWER is a mobile phone to receive power, Io is mobile phones currently receives all signal strength, RSSI is receives downlink band of total power, as currently I have access to information, the title explains, but understanding is very similar, is the phone receives a total of signal strength. RXPOWER and reflects the current signal receiving phone, RXPOWER small area, the weak positive fall within the coverage area, RXPOWER places belong to the covered area. But the high places, RXPOWER and does not necessarily signal quality is good, because there may be no signal, leading to frequency, or too many strong pilot, pilot frequency pollution. Therefore, the analysis of RXPOWER to EcIo to analysis.Above you can see, RXPOWER and simply reflects the drive test signal coverage area, rather than the quality of the signal coverage.
4TXADJ
TXADJ reflects the up and down-link a balance. Note that this value is calculated from the measurement, instead. 800M CDMA system is Tx_adjust = 73dB + Tx_power + Rx_power, 1900M CDMA is Tx_adjust = 76dB + Tx_power + Rx_power.
TXADJ reflects the current location of the mobile uplink and downlink of a more mass. We know that under normal circumstances, the cell phone away from the base station close to the phone's transmitter power will decrease, and
received power will become larger and far away from the cell phone, mobile phone base station transmitter power will increase while receiving power gets smaller. Normally, the transmitter power and receiver power plus a constant fixed values, the result should be a small interval (for example,-10 to + 10). If TXADJ great, it means that the phone's transmitter power, receive the power, then it is obvious that mobile current downlink of good quality (receiving power), and the poor quality of the uplink (transmitter power), this time forward link is better than a reverse link. On the contrary, TXADJ is very small, explains this reverse link well to the forward link. We know that the base station coverage depends on the reverse link loss level. Therefore, in General, we require the following TXADJ in 0. But greater than 10, the reverse link forward link than are poor, the situation is not ideal. For TXADJ, nor can they be said to be as small as possible. But in the actual drive test, we generally encounter, often TXADJ too high, forward link, reverse link.
5 FER
FER is a forward-fer. Forward fer with EcIo also is a comprehensive quality of forward link. Because when the phone is in the multi-channel soft switching, fer actually multi-channel forward an integrated signal quality. FER, description of the mobile phone of the forward link better, received signal is good, this time EcIo also should be better. The larger the Description cell phone FER the received signal strength is poor, EcIo should also at this time. FER is large, it may also be due to a neighboring community switch parameter configuration error. If you switch between adjacent community with leakage, single and mobile to mobile, adjacent to the pilot was not recognized, and the pilot does not recognize, it will become interference signal, resulting in increased FER. In reality, often manifested in mobile, mobile phones, FER a rapid rise in sharp decline, EcIo, and finally dropped.Above that is closely followed by EcIo FER. FER reflects the call quality is good or bad, reflects the RoadTest regional coverage quality level, rather than the signal coverage strength level. In some areas although belonging to the weak signal coverage area, but relatively clean (messy signals, noise), as well as be good FER.
Note the above parameters, EcIo, RXPOWER is the phone in standby or call have parameters, TXPOWER, TXADJ, FER is only a phone call and from the only parameter. The above five parameters, together, to analysis of drive test region to cover the intensity level, the former to override the quality level, as well as the reverse link loss level, and so on, is the analysis of drive test is the most important parameters. In-depth understanding of the five parameters, combined with the overall situation for drive testing specific analysis, is engaged in network optimization staff in one of the basic conditions.
2)RXPOWER
3)Ec/Io
4)TXADJ
5)FER.
1.EcIo
EcIo reflects the handset in the current received pilot signal level. This is an integrated pilot signal. Why, because mobile phones are a multi-channel soft switching, which translates into mobile phones often lies in more than one pilot overlapping coverage area, the level of the phone, EcIo reflects the phone at this point that a multi-channel pilot signal level of the overall coverage. We know that the Ec is a mobile phone available pilot signal strength, and Io is the mobile phone receives all the strength of the signal. Therefore, EcIo reflects the available signal strength in occupies all signals. The higher the value, the greater the proportion of a useful signal, on the other hand also reversed. At some point EcIo big, there are two possibilities. First, the Ec is very large, dominant level here, Ec, Io is very small, that is to say here is from another base station's messy little pilot signal, EcIo also larger. In the latter case is weak, because the Ec small, Io is also small, so small, so RSSI also there may be dropped. At some point EcIo also small, there are two possible, first, the Ec is also small small RSSI, this is the weak coverage area. The Ec is not small, RSSI, this illustrates the Io is the overall intensity of the signal is not bad. This situation is often a BSC switch data configuration, no nearby strong pilot signal into the adjacent community table, so the phone doesn't recognize the strong pilot signal in the vicinity as a jamming signal processing. On the road, in the case of a typical phenomenon is the phone in a move to maintain certain RSSI, EcIo level, rapid rise to FER and eventually dropped.
2 TXPOWER
TXPOWER is the phone's transmitter power. We know that power control is guaranteed call quality and address the CDMA
community interference tolerance and one of the key means of mobile phone from the base station near, uplink quality
good, the mobile phone transmitting power is smaller, because at the base station is able to guarantee the reception of the signal to launch mobile phone and fer also small and mobile phones transmitting power is smaller to other mobile phones in the community is also a small interference. So mobile phones transmit power level, reflecting the handset's current uplink loss and interference. Uplink loss of large, or there is serious interference with the phone's transmitter power will be greatly missed mobile phone transmitting power is smaller. Roadtest, in normal circumstances, the more closer to the base station or Repeater, the mobile phone transmitting power is reduced, away from the base station and Repeater, the mobile phone transmitting power increases. If the base station and Repeater nearby mobile phone transmitting power, obviously it is not normal. Perhaps there is interference, the uplink can be a base station and Repeater itself. Such as community antenna wrong receive carrier frequency amplifier circuit problems, etc. If the Repeater nearby, cell phone transmitter power, it may be a Repeater malfunctions, uplink gain set too small, and so on.Above you can see, the road of TXPOWER level reflects the base station coverage area of reverse link quality and uplink interference levels.
3RXPOWER
RXPOWER is a mobile phone to receive power. In CDMA, according to my personal understanding, there are three parameters is very close by, you can almost equivalent to the use of parameters. Namely RXPOWER, RSSI, Io. RXPOWER is a mobile phone to receive power, Io is mobile phones currently receives all signal strength, RSSI is receives downlink band of total power, as currently I have access to information, the title explains, but understanding is very similar, is the phone receives a total of signal strength. RXPOWER and reflects the current signal receiving phone, RXPOWER small area, the weak positive fall within the coverage area, RXPOWER places belong to the covered area. But the high places, RXPOWER and does not necessarily signal quality is good, because there may be no signal, leading to frequency, or too many strong pilot, pilot frequency pollution. Therefore, the analysis of RXPOWER to EcIo to analysis.Above you can see, RXPOWER and simply reflects the drive test signal coverage area, rather than the quality of the signal coverage.
4TXADJ
TXADJ reflects the up and down-link a balance. Note that this value is calculated from the measurement, instead. 800M CDMA system is Tx_adjust = 73dB + Tx_power + Rx_power, 1900M CDMA is Tx_adjust = 76dB + Tx_power + Rx_power.
TXADJ reflects the current location of the mobile uplink and downlink of a more mass. We know that under normal circumstances, the cell phone away from the base station close to the phone's transmitter power will decrease, and
received power will become larger and far away from the cell phone, mobile phone base station transmitter power will increase while receiving power gets smaller. Normally, the transmitter power and receiver power plus a constant fixed values, the result should be a small interval (for example,-10 to + 10). If TXADJ great, it means that the phone's transmitter power, receive the power, then it is obvious that mobile current downlink of good quality (receiving power), and the poor quality of the uplink (transmitter power), this time forward link is better than a reverse link. On the contrary, TXADJ is very small, explains this reverse link well to the forward link. We know that the base station coverage depends on the reverse link loss level. Therefore, in General, we require the following TXADJ in 0. But greater than 10, the reverse link forward link than are poor, the situation is not ideal. For TXADJ, nor can they be said to be as small as possible. But in the actual drive test, we generally encounter, often TXADJ too high, forward link, reverse link.
5 FER
FER is a forward-fer. Forward fer with EcIo also is a comprehensive quality of forward link. Because when the phone is in the multi-channel soft switching, fer actually multi-channel forward an integrated signal quality. FER, description of the mobile phone of the forward link better, received signal is good, this time EcIo also should be better. The larger the Description cell phone FER the received signal strength is poor, EcIo should also at this time. FER is large, it may also be due to a neighboring community switch parameter configuration error. If you switch between adjacent community with leakage, single and mobile to mobile, adjacent to the pilot was not recognized, and the pilot does not recognize, it will become interference signal, resulting in increased FER. In reality, often manifested in mobile, mobile phones, FER a rapid rise in sharp decline, EcIo, and finally dropped.Above that is closely followed by EcIo FER. FER reflects the call quality is good or bad, reflects the RoadTest regional coverage quality level, rather than the signal coverage strength level. In some areas although belonging to the weak signal coverage area, but relatively clean (messy signals, noise), as well as be good FER.
Note the above parameters, EcIo, RXPOWER is the phone in standby or call have parameters, TXPOWER, TXADJ, FER is only a phone call and from the only parameter. The above five parameters, together, to analysis of drive test region to cover the intensity level, the former to override the quality level, as well as the reverse link loss level, and so on, is the analysis of drive test is the most important parameters. In-depth understanding of the five parameters, combined with the overall situation for drive testing specific analysis, is engaged in network optimization staff in one of the basic conditions.