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WiWavelength

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Everything posted by WiWavelength

  1. WiWavelength
    Nope, this is a PRL myth that has been repeated for years. Assuming native Sprint coverage, different PRLs do not cause devices to connect to different sites. That is not a function of a PRL. AJ
  2. WiWavelength
    Yeah, the TDD allocation can be changed, though that is a configuration at the network level, as all TDD devices need to maintain a fairly precise synchronization to avoid transmitting while other TDD devices are receiving (and vice versa). If I recall correctly, the default TDD allocation that I have seen for WiMAX is roughly 40/60, uplink/downlink, not taking into the account the guard periods that must be inserted at each link transition. AJ
  3. WiWavelength
    All other factors being equal, Exynos 4 will not be as power efficient as Qualcomm Krait for several reasons. As digiblur correctly points out, Exynos is just a processor, while Krait can be configured as a processor + modem on single SoC. Thus, Exynos automatically requires a standalone baseband modem chipset to partner with its processor. Additionally, Exynos is built on a 32 nm process, Krait on a 28 nm process. So, Krait will have a slight advantage there. For some concrete examples, compare the EVO LTE and Galaxy Note 2. In the EVO LTE, the Krait MSM8960 single SoC covers processor, modem, WLAN, Bluetooth, and GNSS. In the Galaxy Note 2, the Exynos 4 covers the processor, a standalone Qualcomm MDM9615 covers the modem and GNSS, finally a Broadcom BCM4334 chipset covers WLAN and Bluetooth. So, Exynos designs require at least one additional chipset (modem), and the Galaxy Note 2 actually uses two extra chipsets (modem and WLAN/Bluetooth). AJ
  4. WiWavelength
    CDMA1X does not require great signal strength. Remember, it is using the full 1.25 MHz channel bandwidth to deliver a voice signal that averages about 5-6 kbps. AJ
  5. WiWavelength
    To echo digiblur's sentiments, we definitely want to encourage members to contribute information. In fact, we need members to contribute information to keep S4GRU a vibrant, growing community. But especially when that contribution is a new thread, we need members to be diligent about the accuracy of their information. Plenty of other wireless focused forums are larger than S4GRU, but much of their discourse is based on unsubstantiated speculation or downright misinformation. S4GRU, on the other hand, has a solid reputation for knowledge and accuracy, and we want to maintain that reputation. AJ
  6. WiWavelength
    ...which is interesting because Ethernet has been around for more than 25 years. AJ
  7. WiWavelength
    I am not sure where you are getting your info today, but it is not accurate. LTE 1900, LTE 800, TD-LTE 2600, or all of the above, it does not matter. The device will have a single LTE baseband modem, and only one LTE band will be active at any given time. AJ
  8. WiWavelength
    Not exactly. TDD stands for Time Division Duplex. The division between uplink and downlink is in time, not frequency. The entire carrier bandwidth is devoted to uplink, then downlink on an alternating basis. AJ
  9. WiWavelength
    Your sweeping conclusion misses the mark in many respects. And I suspect that your conclusion is based on your experience with the Galaxy Nexus, which is an aged, compromised design because of its choice of multiple chipsets. In devices such as the EVO LTE and Galaxy S3, both of which use a single 28 nm SoC for processor and CDMA2000/LTE modem, battery drain is not significantly greater in LTE mode. So, I would suggest that you revise your post to explain "Why LTE drains so much Galaxy Nexus battery." AJ
  10. WiWavelength
    Whatever happened to everyone's BFF Russ McGuire? Does he still work for Sprint? Or is he resting in a cubic yard of cement at the bottom of Chesapeake Bay? Or is he like Keyser Söze? AJ
  11. WiWavelength
    Did you stick the landing? I heard that the East German judge gave you only a 7 because of your dismount. AJ
  12. WiWavelength
    Thank goodness for that. A question that you never want to hear: "How's your IBS?" I know, I know, I joke too much. But I cannot help it sometimes. AJ
  13. WiWavelength
    I sometimes watch news in the buff. Does that count? AJ
  14. WiWavelength
    I am not surprised that the Photon sold better than urban areas. City real estate tends to be expensive. AJ
  15. WiWavelength
    Good grief, you, too, are missing my point. Do you understand that you may not represent most cellphone users? And do you understand that many cellphone users think that they cannot effectively use their devices if their signal bars are low? Heck, I would like for engineering screen readouts to be standard on the home screen, but that does not mean my wish is appropriate for all users. AJ
  16. WiWavelength
    You are missing my point. People who live in markets with larger site spacing might disproportionately prefer device A, while people who live in markets with tighter site spacing might disproportionately prefer device B. That could be unlikely, but if true, it would constitute bias in the sample set. Well, we already use those FCC OET uplink stats to project RF performance. But Bob's proposal is to use Sensorly data instead. Additionally, uplink/downlink performance really need to be assessed holistically. The LG Viper, for instance, offers healthy max ERP/EIRP, but reportedly offers rather mediocre performance. AJ
  17. WiWavelength
    TMI. Too much information for the commoners. And that is probably for the best. Nearly all mobile phone users need info on the level of a one bit binary value. Will the device work at this time in this location? Yes/no? Any info more granular than that just causes them needless agita. AJ
  18. WiWavelength
    Guaranteed, the -115 dBm reading was LTE RSRP. The 2-3 signal bars, however, could have been and probably were based on CDMA1X RSSI. So, all bets are off. Engineering screens (or apps that pull from the same) are the only worthwhile sources of signal data. AJ
  19. WiWavelength
    I think the best that Sensorly could do would be to report the median signal level per device during a select time period in which all of the devices in the survey were available. The law of large numbers, as you note, would presumably average out the inconsistencies among reporting locations. However, I would want to see the numbers of each device used to calculate those stats. And such a survey still could not account for location bias. Is it possible, for example, that Sprint LTE subs in markets with minimal deployment prefer the Galaxy S3? Furthermore, any Sensorly signal measurement would take into account the downlink only. But that tells only half the story. Strong downlink reception combined with weak uplink transmission equals poor service, though the Sensorly downlink data would suggest otherwise. AJ
  20. WiWavelength
    That is an interesting proposition, but I do not think that it would produce particularly meaningful results. In most locations, Sensorly simply does not aggregate enough data to produce valid averages across multiple devices. Moreover, Sensorly does not track location with high enough resolution to compare data sets acquired at similar locations. For example, device A is in location X and reports signal strength of -80 dBm. Device B is 15 feet away from location X and reports signal strength -70 dBm. Per Sensorly reporting, both handsets are in the same location. So, does device B offer superior RF performance, or is device A simply in a fade due to multipath? In the end, the RF performance data that you seek can really only be acquired in a highly controlled lab environment. AJ
  21. WiWavelength
    As a geographer particularly fascinated by the Southern California highway culture, I love this Saturday Night Live sketch. Of course, it is an exaggeration, but it seems aptly described as "roads & bros." http://www.hulu.com/watch/350669 AJ
  22. WiWavelength
    My redheaded cousin is named Molly. But holy moly, I sure would not call her "holy." AJ
  23. WiWavelength
    Now, that is what I call an austere site. No bag for those groceries, no bacon on that burger, no extra cheese on that taco, no added fees for that withdrawal. AJ
  24. WiWavelength
    It is a cliché, but do not let the door hit you in the ass on the way out... AJ
  25. WiWavelength
    Agreed. With the SoftBank investment, Sprint needs to get a backbone and kick some subs to the curb. I see. So, Sprint should offer subs differential pricing? Great! I use 10 minutes of voice airtime per month and under 1 GB of data. Where is my discount/credit for not taxing the network? The saying goes, "the squeaky wheel gets the greasing." Is that how it always should be? Or just maybe, the squeaky wheel should buck up and find another carrier. AJ
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