In the context of the 2013 Internet Conference held in Beijing on August 13th, Xunlei CEO Zou Shenglong highlighted that the adoption of smart TVs and mobile networks still faces limitations. He pointed out that the cost of 3G data plans is about 500 times higher than that of a 4M fixed-line connection. If 3G tariffs could be reduced to match those of fixed-line services, it would open up greater opportunities for the development of the broader internet ecosystem. Beyond just the internet industry, the expansion of mobile networks also significantly influences the evolution of wireless video surveillance.
The rise of wireless monitoring has become an unstoppable trend. Compared to traditional wired systems, wireless video surveillance offers greater flexibility and eliminates many of the challenges associated with wiring. It also reduces implementation costs in many scenarios. These systems typically rely on wireless communication technologies such as 3G, 4G, and Wi-Fi to establish connections. When combined with conventional video surveillance methods, this creates new application models. According to market research, wireless networks now account for over 37% of video surveillance applications in medium- to large-scale projects across industries like public safety, forest fire prevention, parks, and highway transportation. The growth rate of wireless networks is more than three times that of their wired counterparts, and more than half of the surveyed projects are considering implementing wireless solutions. Security companies have already begun entering the consumer market, suggesting a massive potential demand for civilian network-based monitoring.
It's clear that wireless networks are no longer just a supplementary option in the surveillance market. Their rapid advancement is making it increasingly difficult for traditional wired systems to keep up. As a result, the shift toward wireless monitoring is becoming irreversible.
However, the development of domestic mobile network infrastructure remains a challenge. Recent reports highlight that China’s average mobile internet speed is significantly lower than global standards. For example, in a test conducted by Beijing Youth Daily, the average download speed in mainland China was only 1.15 Mbps, compared to 10.5 Mbps in Hong Kong and 4.64 Mbps globally. This puts China at 80th place worldwide. Additionally, the cost of internet access in China is much higher than in other countries—four times that of the U.S., 20 times that of South Korea, and 100 times that of Hong Kong. Despite these high costs, the speeds remain low, raising concerns about the quality of network infrastructure.
Wireless monitoring relies heavily on stable and fast network connections. While 3G coverage has expanded in some urban areas, the number of base stations is still insufficient, leading to unstable connections in certain regions. Many second- and third-tier cities, as well as rural areas, lack 3G coverage altogether, which limits the growth of wireless monitoring in these regions. Moreover, the high cost and limited bandwidth of network construction pose significant challenges.
Industry experts have pointed out that even though 3G networks offer better performance than 2G or 2.5G, the actual transmission speed can vary depending on environmental conditions. In indoor settings, 3G can support up to 2 Mbps, while outdoor and moving environments may only reach 384 Kbps or 144 Kbps. This variability makes it difficult to ensure consistent bandwidth for video transmission.
For standard video surveillance, different resolutions require different bandwidths. Current compression technologies allow for efficient transmission, but even with CIF resolution, a single 3G base station can only support up to three monitoring points. Additionally, 3G operators prioritize voice traffic over data, which can lead to unstable connections for mobile monitoring users. Transmission of 4CIF format video requires at least 2 Mbps, while high-definition video needs over 6 Mbps. Given current 3G speeds, it's still only suitable as a supplementary solution.
Beyond technical limitations, the cost of mobile monitoring also plays a major role in user adoption. Expenses include broadband fees, mobile viewing charges, and system maintenance. For example, transmitting one hour of 4CIF video through 3G can consume between 1 to 2 MB of data. At a rate of 0.01 yuan per KB, this translates to a cost of 10.24 to 20.48 yuan. Over time, these costs add up significantly, making 3G an expensive option for long-term use.
Although 4G networks show promise with faster speeds—up to 40 Mbps downlink and 18 Mbps uplink—the same issues of prioritization and bandwidth limitations persist. As a result, high-definition wireless monitoring remains challenging. Users are now placing high hopes on 4G’s pricing and performance to make HD transmission more viable.
In conclusion, the future of wireless monitoring depends on overcoming key challenges such as bandwidth, stability, and cost. With continued advancements in network technology, wireless surveillance is set to become even more powerful and widely adopted.
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