Increase the bandwidth is the most direct method to increase capacity and transmission rate, is now the biggest bandwidth will reach 400 MHZ 5 g, given the current frequency usage, 5 g will have to use high frequency communication,
3 GPP protocol defines from Sub6G (FR1) to 5 G of millimeter wave (FR2) target spectrum, including FR1 is the core of the 5 G band, with 3.5 G (C band) near the spectrum as gold band of 5 G deployment, FR2 because of high frequency spectrum, the attenuation fast, as an aid in the spectrum of 5 G, used for hot spots rate increase,
3 GPP protocol defined 5 g spectrum FR1 as follows, compared with the 4 g LTE band to do some of the merger, split and to add, including SUL TDD (auxiliary) used for has decoupled in order to enhance upward edge cover
CodePudding user response:
Millimeter wave (MMW) answering questionsQ: at present, the millimeter wave in domestic application scenarios have?
Answer: millimeter-wave application scenarios: eMBB WTTx, move back,
Q: operators choose frequency of what are the advantages and disadvantages? Able to speak the actual?
Answer: sub3G advantage coverage performance is good, shortcomings available resources, less c-band advantage resources, TDD faults has imbalance,
Q: why millimeter wave is TDD.
A: millimeter wave high bandwidth, for cost reasons, UE do not need to support the bandwidth is too big, FDD spectrum bandwidth requirements for mobile phone support is higher, and easier to apply TDD beam informs,
Q: sub covers 5 g 3 g and 4 g is the same?
Answer: sub3g 5 g and 4 g coverage is similar, because no matter what kind of technology, sub 3 g band is the same, the cover effect is the same,
Q: AAU power than RRU power?
Answer: the AAU power higher than RRU, currently 200 w, 240 w, 320 w,
TDD q: has decoupled all manufacturers support now? Or huawei support?
Decoupling agreement, TDD answer: has nothing to do with factory, now some manufacturer support, some manufacturer does not support,
Q: which is now the mainstream of 5 g band?
Answer: the current mainstream 5 G band is mobile 2.6 G, telecom and China unicom Shared 3.4 3.6 G,