Abstract
The imbalance between the uplink and downlink rates and coverage of the 5G network has led to limited vertical industry services. Aiming at breaking the imbalance between the uplink and downlink rates and improving the coverage of 5G network, a uplink coverage enhancement algorithm is designed from the aspects of networking mode, bandwidth, uplink and downlink subframe ratio, etc. It uses high- and low-frequency time-frequency joint scheduling to enable uplink full-time slot scheduling, thereby improving uplink coverage and rate. According to the actual test on the live network, the results show that the super-uplink algorithm can increase the near-point uplink rate by 15% to 30%, increase the uplink rate for indoor midpoint scenarios by 40% to 80%, and increase the uplink rate for outdoor and indoor weak spot scenarios by 100% to 400%.
Highlights
When redefining 5G networks guided by industry needs, the 2C market has mainly high speed and the current 5G network speed can reach more than 1 Gpbs downstream, which is fast enough to meet the market demand
The demand for uplink speed of the smart mining factory has reached more than 100 Mbps, and the end-to-end delay requirement is less than 15 ms. e 5 G uplink rate is limited by multiple factors such as terminals, networks, and frequency spectrum, which make it difficult to meet the uplink rate requirements of vertical industries. e transmitting power of the terminal is much smaller than the transmitting power of the base station, and the difference between the two powers is nearly a thousand times
As the 5G network is still mainly for mass services at this stage, the time slot ratio is still dominated by downlink time slots [1, 2]. e difference in uplink and downlink coverage is huge, and the uplink coverage is obviously limited [3,4,5]
Summary
When redefining 5G networks guided by industry needs, the 2C market has mainly high speed and the current 5G network speed can reach more than 1 Gpbs downstream, which is fast enough to meet the market demand. E 5 G uplink rate is limited by multiple factors such as terminals, networks, and frequency spectrum, which make it difficult to meet the uplink rate requirements of vertical industries. In the deployment of vertical industry applications, its uplink coverage and speed are a major requirement. Due to the high frequency band and low time slot of the network, the uplink coverage of the 5G network is not continuous [6]. E study in [7] proposes to use spectrum aggregation technology to solve the uplink and downlink access of 5G heterogeneous networks, but it cannot completely solve the problem of cell handover [8, 9]. Erefore, incorporating the 1.8/2.1 GHz frequency band into 5G network construction can obtain greater uplink and downlink advantages In terms of the 3.5 GHz high-frequency site, China Telecom has 1.8/2.1 GHz low-frequency sites. e number of sites nationwide is about 60,000, and the load is low. erefore, incorporating the 1.8/2.1 GHz frequency band into 5G network construction can obtain greater uplink and downlink advantages
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