Carrier Aggregation (CA) is a technology that increases bandwidth by combining multiple independent carrier channels to increase data rate and capacity. When outdoor 4g cpe router adopt Carrier Aggregation technology, the most prominent and core performance is that the outdoor 4g cpe router speed will be increased exponentially or even several times. However, because it does not adopt disruptive and leap-forward new technology such as 5G technology which network speed up to 100G/S, industry refers to the accelerated 4G network as 4G+, or 4Gplus in English.

Carrier aggregation is an important new technology that has the basic features of integrating wireless channels within or across frequency bands to increase data transmission rate and reduce delays. Although current LTE mobile terminals can support multiple LTE RF channels, they can only download through one channel at one time; LTE carrier aggregation can realize downloading through two or more LTE RF channels at the same time, which helps to make full use of chipset’s rated LTE data rate set. CA technology can aggregate 2 to 5 LTE component carriers (Component Carriers, CC) to achieve a maximum transmission bandwidth of 100MHz, effectively improving uplink and downlink transmission rate. Terminal itself determine how many carriers to use at the same time for uplink and downlink transmission according to its own capabilities.

3GPP(3rd Generation Partnership Project) defines five main carrier aggregation application scenarios to optimize network performance according to different environments.

1. Two carriers CC1 and CC2 in same or adjacent frequency bands, their antenna configurations and coverage area same also, this scenario is suitable for urban dense areas and can effectively enhance signal strength and capacity.

2. Two carriers belong to different frequency bands, high-frequency carrier has smaller coverage area, however low-frequency carrier can cover it alone at the edge of the community, while in central area, the two overlap to improve overall throughput. This is suitable for suburban areas or areas where signal attenuation is obvious.

3. Utilize antenna pointing in different directions, for example overlapping the center area of CC2 with the edge of CC1 so as to provide higher data rate in edge area and enhance edge performance.

4. Combined remote radio frequency units (RRH) with macro base stations, use more carriers in hotspot areas to increase throughput. Connect RRH and eNodeB with optical fiber to work together to achieve spectrum aggregation in macro communities and hotspot areas and improve network efficiency.

5.Based on scenario 2, extend the coverage of carrier CC2 at community edge with repeaters can effectively improve signal coverage, especially in environments with strong frequency selectivity. In the implementation of carrier aggregation, LTE-A system supports two main methods: MAC layer aggregation and physical layer aggregation. MAC layer aggregation merge data streams in higher-level protocols, but physical layer aggregation is handled at the underlying hardware level, for example hybrid automatic repeat request HARQ and acknowledgment/negative feedback ACK/NACK. These two methods ensure efficient transmission of data across multiple carriers, improve overall network performance.

The five carrier aggregation application scenarios specified by 3GPP covers many different kind of network deployment situations.

1.Carrier aggregation in same or similar frequency bands, all carrier members have same antenna configuration and provide same coverage.

2.Different frequency carrier aggregation, high-frequency carrier coverage is small, but two carriers in the center area of the community overlap to improve throughput.

3.Sector overlap caused by different antenna angles improve throughput in edge areas.

4.Use remote transmitting units (RRH) to enhance coverage in hotspot areas and realize spectrum aggregation of macro communities and RRH communities.

5.Use frequency-selective repeaters to extend the coverage of high-frequency carriers. Technical means to realize carrier aggregation mainly include MAC layer aggregation and physical layer aggregation. MAC layer aggregation is to combine data packets, while physical layer aggregation is to combine data streams at physical layer. Each component carrier has its own independent transport block, which is responsible for transmitting data, and has a separate Hybrid Automatic Repeat-reQuest (HARQ) process for error detection and correction. In the meantime, each carrier will also have a corresponding ACK/NACK feedback mechanism to ensure accuracy and efficiency of data transmission. LTE-A’s carrier aggregation technology achieves more efficient and flexible spectrum utilization by flexibly combining different carrier resources, significantly improving network performance, especially in processing large data volumes and meeting the needs of high-speed mobile users.

5g carrier aggregation is key technology in LTE-A. In order to meet requirements of single user peak rate and system capacity improvement, one of the most direct way is to increase transmission bandwidth of system, therefore LTE-Advanced system introduces a technology to increase transmission bandwidth which is CA. CA technology can aggregate 2 to 5 LTE member carriers together to achieve maximum transmission bandwidth of 100MHz, effectively improving uplink and downlink transmission rates. 5g cpe outdoor router with 5g carrier aggregation technology is to use certain frequency radio waves to transmit signals, the function is to increase internet speed, it is further optimized and upgraded based on 4G carrier aggregation technology. Comparing with 4G, 5G has higher frequency, larger bandwidth and lower latency. This gives 5g cpe outdoor router greater advantages in terms of transmission rate, number of connections, and real-time performance. Therefore, application of 5G carrier aggregation technology will bring revolutionary changes to wireless communications.

So, how is 5G carrier aggregation technology implemented? In 5G networks, operators can use advantageous resources of different frequency bands to aggregate low-frequency and high-frequency carriers, can’t only improve transmission rate of the network but also achieve better network coverage. Besides this, 5G carrier aggregation technology can also realize carrier aggregation across operators, allow users to enjoy better services among different operators.

The application of 5G carrier aggregation technology will bring many conveniences to our lives. First of all, 5G networks can provide higher data transmission rate to meet users’ needs for high-speed networks by aggregating multiple carriers. Whether watching high-definition videos, playing games or working remotely, users can enjoy a smooth experience.

Secondly, 5G carrier aggregation technology can achieve better signal coverage by aggregating low-frequency and high-frequency carriers, operators can expand network coverage while ensuring transmission rates, so that users can enjoy good network services in different regions.

Finally, 5G carrier aggregation technology can reduce network latency and improve the real-time performance of data transmission. This is of great significance to fields such as autonomous driving and telemedicine, for example in self-driving cars, the car can receive information about the surrounding environment in real time with 5G carrier aggregation technology, so as to achieve safer and smarter driving.

In one word, as one of the important innovations of 5G networks, 5G carrier aggregation technology will bring revolutionary changes to our wireless communications. By aggregating multiple carriers, 5G networks can achieve higher transmission rate, better network coverage and lower network delay, to bring users more convenient and efficient communication experience. In future development, we have enough confidence that 5G carrier aggregation technology will become an important business card in the field of wireless communication.

Application scenarios of 5G carrier aggregation technology

1.Telemedicine:5G carrier aggregation can support the development of telemedicine technology, realize functions such as remote surgery, remote diagnosis and monitoring, improve accessibility and quality of medical services.

2.Smart city: All aspects of the city can be made intelligent, including traffic management, public safety, environmental monitoring etc. with 5G carrier aggregation technology.

3.Internet of Things (IoT): 5G carrier aggregation can support connection of more IoT devices, such as devices in smart homes, smart cities, smart agriculture and other fields, 5G carrier aggregation can help enable a variety of IoT applications by providing more reliable and efficient network connections.

4.Enhanced mobile broadband (eMBB): 5G carrier aggregation can provide users with faster and more stable download and upload speeds by increasing network speed and capacity, satisfying users’ requirements for high-definition video streaming, massive multiplayer online games, real-time audio and video requirements for high-bandwidth applications.