CN115515146A - An indoor distribution system - Google Patents

Abstract

The invention belongs to the technical field of communication, and in particular relates to an indoor distribution system. An indoor distribution system, including a baseband processing unit, an optical splitter, and a radio frequency unit; the baseband processing unit transmits signals to the optical splitter, and the optical splitter splits the signal to realize that the same optical path carries multiple independent signal services ; The multiple independent signals transmit signals to several radio frequency units respectively, and the several radio frequency units transmit signals to the user's equipment through an optical modem. The present invention is mainly used to cover multiple floors, large basements, and urban villages with multi-channel signals, fully utilizes the existing PON network environment, and realizes high-quality and low-cost 4G/5G wireless signals based on the existing PON network Coverage, and the number of base station cells required by the present invention is small, the relationship between neighboring cells is simple, the cell interference is small, the required core network parameters are few, the workload of opening and management and maintenance is small, and the opening cost of existing pico base stations is reduced.

Description

An indoor distribution system

technical field

The invention belongs to the technical field of communication, and in particular relates to an indoor distribution system.

Background technique

With the rapid development of society and the popularization of the Internet, people's work and life are inseparable from the Internet. Therefore, this requires higher requirements for all aspects of network signals, especially for densely populated places, such as office buildings and large shopping malls. , university dormitories/factories, residential quarters, large basements, etc. At present, for places with dense population and high population mobility, there are more interference factors to network signals, resulting in uneven signal coverage, signal blind spots or signal cards. Ton phenomenon.

When the current indoor distribution system (CN201811647785.6) requires multiple leaky cables with output in the same direction and the same polarization mode to be arranged side by side on the same inner wall, the minimum staggered distance between adjacent leaky cables is 5mm. The leakage unit is installed at one or more places above the indoor ceiling, below the indoor floor tiles, and inside the vertical side walls. The route is complicated and the installation is difficult. For the construction of indoor distribution, there are high installation costs and subsequent operation energy consumption. Big, cost-effective problem.

Contents of the invention

In view of the above existing problems, the present invention proposes a new indoor distribution system, which makes full use of the existing PON network environment, transmits the multiplexed traditional PON network from the secondary optical splitting signal to the indoor, and realizes the same optical path to carry two independent services through optical splitting .

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

An indoor distribution system, including a baseband processing unit, an optical splitter, and a radio frequency unit; the baseband processing unit transmits signals to the optical splitter, and the optical splitter splits the signal to realize that the same optical path carries multiple independent signal services ; The multiple independent signals transmit signals to several radio frequency units respectively, and the several radio frequency units transmit signals to the user's equipment through an optical modem.

Further, the radio frequency unit is installed indoors through a ceiling mount.

Further, the optical splitter adopts a two-stage optical splitter.

Further, the baseband processing unit uses PON network or IPRAN to backhaul the core network.

Further, the radio frequency units are connected by a composite optical cable.

Further, the baseband processing unit and the optical splitter are placed at the same position.

Further, the baseband processing unit and the radio frequency unit are connected by a composite optical cable.

Furthermore, the RUs on each floor are deployed at the same location to optimize the impact of interference between dormitories.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention makes full use of the existing PON network environment and realizes high-quality and low-cost 4G/5G wireless signal coverage based on the existing PON network; The transmission of level-split optical signals to the user's home enables the same optical path to carry two independent services through optical splitting. The signal converter equipment entering the home does not need dedicated 4G and 5G baseband chips. The equipment to achieve 4G/5G wireless coverage is relatively simple and consumes less power. , the cost is low, and it is easy to popularize and promote; compared with the 4G integrated skin station, the number of base station cells required by the present invention is small, the relationship between neighboring cells is simple, the cell interference is small, the required core network parameters are few, and the workload of opening and management and maintenance is small , to reduce the cost of opening sites for existing pico base stations.

Description of drawings

Fig. 1 is that the present invention implements the network structure distribution figure of high-rise residence, village in the city;

Fig. 2 implements the network structure distribution figure of university, factory dormitory for the present invention;

Fig. 3 is a distribution diagram of the network structure of implementing the present invention in a large basement.

detailed description

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An indoor distribution system of the present invention is mainly used to cover multiple floors, large basements and urban villages with multi-channel signals.

Example 1

An indoor distribution system in this embodiment includes a baseband processing unit, an optical splitter, and several radio frequency units; the baseband processing unit transmits signals to the optical splitter, and the optical splitter splits the signal to realize the same optical path carrying A plurality of independent signals, the plurality of independent signals respectively transmit signals to several radio frequency units, and the several radio frequency units transmit signals to the user's equipment through an optical modem.

One baseband processing unit can support multiple radio frequency units, adopting BBU+RRU multi-channel solution to solve indoor and outdoor signal coverage.

If there is no optical modem (optical modem) user, the signal converter can be cascaded, and the signal converter equipment for entering the home does not need a dedicated 4G and 5G baseband chip.

According to the requirements, the optical splitter can use a secondary optical splitter; the radio frequency unit uses a B1-2TR radio frequency unit: 2.1GHZ/4G 5G each with 20M bandwidth.

As shown in Figure 1, for high-rise residences, urban villages/shops, it mainly solves the indoor signal blind spots of low-rise users. The baseband processing unit is placed at the position of the optical splitter, and the radio frequency unit and optical modem are placed in the user’s room. If there are no optical modem users, RUs can be cascaded. When used in residential quarters, it mainly reduces high-level interference and low-level weak coverage for accurate home access. The radio frequency unit (RU) of this embodiment covers about 120 square meters, 16 households per community.

As shown in Figure 2, in the case of a large number of rooms such as a residential area or a dormitory, an optical modem or optical modem is installed in each residential area, and the baseband processing unit transmits the signal to each optical modem or optical modem through an optical splitter In this embodiment, the radio frequency units are set to have the same power output, and the signal strength is 70dbm. In the case of no barrier in a single room, one radio frequency unit can completely cover. It is best to deploy each RF unit in the middle of the bedroom, and deploy the upstairs and downstairs RUs at the same position to optimize inter-cell interference.

As shown in Figure 2, when it is used in college dormitories/factories, it mainly divides the capacity of indoor and outdoor macro stations, and the baseband processing unit is placed at the optical splitter on the floor. According to the size of the room, one radio frequency unit (RU) is placed for every three dormitories. ), each radio frequency unit (RU) is deployed in the middle of the dormitory, and the upstairs and downstairs RUs are deployed in the same place, and multiple signals are respectively connected to the radio frequency unit (RU) arranged on each floor.

Example 2

Taking the student dormitory as an example, the 3rd to 6th floors are male dormitories, each floor has 20 rooms, each room has 12 students, and each floor can accommodate 240 people. Based on the 40% occupancy rate of school telecom users, there are about 96 telecom users on each floor. In this embodiment, LTE-FDD intensive networking micro-stations are used to provide high-quality user experience for students.

In this implementation, a 10G aggregation switch is deployed in the dormitory area to save transmission resources. The uplink port of the switch is connected to the IPRAN A device through a 10G optical fiber, and the downlink port of the switch is connected to the BBU device through a Gigabit electrical port. Simplify IPRAN networking and reduce transmission deployment.

The baseband processing unit is deployed in a weak electric well, and is connected to a 10G aggregation switch through a network cable. The 10G aggregation switch is connected to a private network security network management system through a network cable, and sends network information to the core network (EPC core network) through the private network security network management system. ) and Network Management System (NMS).

The radio frequency unit (RU) is set in the center of the dormitory through a ceiling mount. Each RU is deployed in the middle of the bedroom, and the upstairs and downstairs RUs are deployed in the same position to optimize the impact of interference between dormitories. The baseband processing unit transmits the signal to the optical splitter, and the optical splitter transmits the signal to several radio frequency units.

The dormitory area includes 2 communities, and each community uses 1 BBU to connect with 4 radio remote modules through optical leather cables;

In this embodiment, the configuration of the cell is HOME mode, and the cell shares one eNB ID; each radio frequency unit (RU) is deployed in the middle of the bedroom, and the upstairs and downstairs radio frequency units (RU) are deployed at the same position to optimize inter-cell interference influences.

In this embodiment, all radio frequency units (RU) use 2.1GHz/24dbm/2TR, and frequency point 100 is used. The RU is plug and play, which is convenient for cell expansion, and the network is easy to introduce 5G to complete 4+5G coverage.

Deployment of network management: Complete the switch between micro-sites in dense networking and between them and macro-sites. The LTE-FDD intensive network micro-station can divert the macro-station and complete the precise coverage of the dormitory, improving the quality of user experience.

Example 3

The present invention can also be used in large-scale basements to mainly solve the signal coverage of large-scale basements (more than 10,000 square meters). As shown in Figure 3, the indoor distribution system of this implementation includes a baseband processing unit and several radio frequency units (RU). It is connected to several radio frequency units (RU) through composite optical cables, and one BBU can connect 48 radio frequency units, covering 30,000 square meters. The baseband processing unit (BBU) can use PON network or IPRAN to backhaul the core network, making full use of the existing PON network environment and reducing the construction cost of small base stations.

The plurality of radio frequency units (RU) are connected through a composite optical cable; the baseband processing unit is connected with an optical line terminal OLT through an optical distribution network (ODN-1-8).

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments are not exhaustive in all detail, nor are the inventions limited to specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (8)

1. An indoor distribution system, characterized in that it includes a baseband processing unit, an optical splitter, and a radio frequency unit; the baseband processing unit transmits signals to the optical splitter, and the optical splitter realizes the same optical path by splitting the signal Multiple independent signal services are carried; the multiple independent signals respectively transmit signals to several radio frequency units, and the several radio frequency units transmit signals to user equipment through an optical modem. 2. The indoor distribution system according to claim 1, wherein the radio frequency unit is installed indoors through a ceiling mount. 3. The indoor distribution system according to claim 1, wherein the optical splitter is a two-stage optical splitter. 4. The indoor distribution system according to claim 1, wherein the baseband processing unit adopts two methods of PON network or IPRAN to backhaul the core network. 5. The indoor distribution system according to claim 1, wherein said radio frequency units are connected by composite optical cables. 6. The indoor distribution system according to claim 1, wherein the baseband processing unit and the optical splitter are placed at the same position. 7. The indoor distribution system according to claim 1, wherein the baseband processing unit and the radio frequency unit are connected by a composite optical cable. 8. The indoor distribution system according to claim 1, wherein the radio frequency units on each floor are deployed at the same location.

Images