April 11, flying all the relevant channels as the network obtained from the first round of all listed 6 TD phone: ZTE U980, Samsung L288, LG KD876, Hisense T68, Lenovo TD800, New Postcom N268.
6 TD models Terminal family portrait
4 12 9:00 ~ 13:00, flying journalists in the first phase of the terminal as the network based on the evaluation of 6 TD launched high-speed mobile terminals under the second phase of a comprehensive evaluation.
initial assessment and evaluation of different live
, the main contents of the second round of testing network coverage in Beijing TD and 6 terminals in different locations and under different state of motion effects and feelings 3G video calls.
order to better tested 6 TD terminals and network coverage in Beijing, fly like a network news-pronged, divided into A, B to start testing the two groups.
A group evaluation Fact:
A group member, TD terminals and the Bird's Nest
A team 9:00, after driving from the East Fourth Ring Baiziwan New Town, passing through the Chang'an Avenue to the Gongzhufen International Trade, and then along the West Third Ring Road to the East Gate Stone Bridge Benbei National People's Congress, and then on through the Zhongguancun City of Victoria, changing lanes from the Quaternion Bridge Terminal 3 went straight to the airport expressway, and finally return to the office network Baiziwan Dumbo. test terminal is ZTE U980, Lenovo TD800, Hisense T68, New Postcom N268.
in International Trade The A team and B team in the video call Gongzhufen good effect, turn smoothly.
A team in the Zhongguancun Yangqiao the B group and in the general effect of video calls, many dial-up connection can be established, the video also frequently a mosaic.
in the nest of the A team and B team in the East Third Ring Road, a video call works well, but still appears to many dial-up connection is established phenomenon.
Terminal 3 at the airport outside the group A Dumbo and the network in the office Baiziwan B team could not establish a connection, many times the video dial-up failed, while a reporter noted, Airport Terminal 3, outside the TD signal is full frame.
B Group Evaluation Fact:
B group of beautiful people who
B group of testers, with Samsung L288 and LGKD876 starting from Beijing West Third Ring Gongzhufen were measured along the South Third Ring Road. Since the South ring road is not good, the speed of 30 km has been .
Gongzhufen to Lize Bridge in the road, press test LG phone video calls, occasional stagnation mosaics and pictures, Samsung's business card is has not been tested TD signal.
10:00 ~ 10:30 points, Lize Bridge to Caoqiao a reporter to two phone SIM card swap, Samsung and LG mobile phone able to receive the TD signal. Caoqiao reaching the vicinity of reporters with the A group with two phones colleagues make video calls, LG cell phone screen more smoothly, with occasional mosaic appeared, but the voice small, need to wear headphones for video, voice calls at the same time; Samsung mobile phones LG mobile phones with test results similar to, but because there is no reporter in the hands of Samsung mobile phone headset , resulting in a video call volume smaller. Overall, the video phone call two effects is still ideal, but dropped a serious problem, calling and called often can not get it.
10:30 am to 11:30 pm , Caoqiao to Shilihe Bridge section of road improved, the basic speed can be maintained at 50 to 60 km, 10:30 reporters Samsung and LG mobile phones with video calls, two phone calls at 1 meter away from more serious when the interference of sound, but the video images remain smooth, no dropped phenomenon.
11:00 AM, reaching the Fangzhuang bridge, the reporter was tested using two mobile phones streamed mobile TV services, mobile dreams network show the user can choose to watch the two models GPRS or TD (friendly user card can only use the TD mode), the reporter has selected several tests the two models, but have shown that the network is busy. video download, the prompt Monternet Basically, the important commercial areas in Beijing area (such as Zhongguancun International Trade), transport routes (city of the Circle) and the airport, TD signal coverage have done well. but indoor coverage is not satisfactory, this is late TD the main problem to be solved.
voice call: 90 TD voice calls sound clear in the video call, although the mosaic or can not see each other occasionally the case of video, voice quality is still very good.
video call:
65 points in the evaluation, A group and B group in various locations were conducted using different terminals 9 video calls. once the number of connected calls is 3, connection rate at 30%.
While we complain about some of the video call completion rate is low, a visitor to the nest to play in Nanjing told us that he previously worked in the UK, experienced Vodafone's 3G WCDMA-based video phone, the one-time connection rate is also probably on 40%. I watched the video call effect, he told us the video phone fluency TD performance is not very different with Vodafone.
nest next to the ordinary user feel the TD application
low completion rate for video telephony , we also consulted on Microwave and Digital Communications, Tsinghua University State Key Laboratory of Professor Wang Jing, deputy director.
Professor Wang Jing told us, TD signal strength parameters determined by the pilot, and video call quality is the wave number where the user calls the decision. If the call is the wave number algorithm inaccurate, prone to cell phone signals can not turn over the case. This is also the need to focus on improving the TD where the follow-up.
video call, differences in the performance of different terminals , where ZTE U980 performance of the most stable. taking into account 6 different TD and positioning the terminal selling price, performance disparity also makes sense.
speed Internet access: 80 minutes
order to more realistically test the TD end Internet bandwidth We use the best performance of the Internet ZTE U980 were tested.
Dumbo network address from the input to the fully open, with a time of 10 seconds. then we Monternet wireless communications in the club for a downloaded The first related. until large-scale commercial TD, the speed should be lower than this value.
Final score:
comprehensive score above, flying like the net in the second phase of evaluation to the TD in the final score of 76 points.
Related Links:
first TD commercial trial mobile phone full evaluation
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