CN103702432B - A kind of uplink enhancement method based on geographic position data storehouse - Google Patents

Abstract

The invention discloses an uplink enhancement method based on a geographic location database, which includes the following steps: a main system sends a request for recovering available carrier frequency and protection area information to the geographic location database; the geographic location database sends the available carrier frequency to the affected base station frequency release command and protection area information; the base station estimates the interference of the served users to the main system, and divides the users into different areas according to the interference; the base station allocates uplink and downlink carrier frequency scheduling information for users in different areas ; The base station notifies the geographic location database to update the use information of the available carrier frequency. The invention can effectively improve the utilization rate of the available frequency spectrum of the secondary system and increase the throughput of the uplink, thereby ensuring the network performance and communication service quality of the LTE system.

Description

A Uplink Enhancement Method Based on Geolocation Database

technical field

The invention relates to an uplink enhancement method, in particular to an uplink enhancement method based on a geographic location database, and belongs to the technical field of wireless communication.

Background technique

Cognitive radio is also called smart radio. Its core idea is to realize dynamic carrier frequency allocation and carrier frequency sharing through carrier frequency sensing and intelligent learning capabilities of the system. It is flexible, intelligent, and reconfigurable. Cognitive radio perceives the external environment and uses artificial intelligence technology to learn from the environment, and purposely changes certain operating parameters (such as transmission power, carrier frequency and modulation technology, etc.) in real time to adapt its internal state to the received wireless information. Statistical changes of signals, so as to realize highly reliable communication at any time and any place and efficiently utilize limited wireless carrier frequency resources in a heterogeneous network environment. For specific instructions on cognitive radio, please refer to the article "RSPG CONSULTATION ON COGNITIVE TECHNOLOGIES" jointly published by Qualcomm of the United States and Nokia of Finland.

In wireless communication systems, the shortage of wireless carrier frequency resources makes it difficult for countries all over the world to find continuous large bandwidth. In order to meet the large bandwidth requirements of the LTE-A system, the carrier frequency aggregation technology is introduced in the LTE-A evolution process. The carrier frequency aggregation technology aggregates multiple continuous or discontinuous carrier frequencies, technically solves the LTE-A system's demand for bandwidth, and also improves the utilization of scattered carrier frequencies in the wireless frequency band. But the LTE-A system is not a simple technical extension of the LTE system through multiple carrier frequencies. While the LTE-A mobile station uses multiple carrier frequency units for data transmission and reception, in order to meet the backward compatibility of the system, according to the relevant configuration of the LTE-A system, the LTE mobile station can send and receive information on one of the carrier frequency units .

With the development of cognitive TD-LTE network based on carrier frequency aggregation technology, operators need to increase the average uplink bandwidth to meet the ever-increasing user demand. For example, in the article "HSPA+for Enhanced Mobile Broadband, Qualcomm Incorporated", Qualcomm Incorporated of the United States introduced the increase of link bandwidth through HSPA+ (High-Speed Packet Access+, enhanced high-speed packet access) technology. All the devices and terminals configured in the network now support HSDPA (High Speed Downlink Packet Access, high-speed downlink packet access), which can greatly increase the downlink rate. However, HSUPA (High Speed Uplink Packet Access, High Speed Uplink Packet Access) terminal maturity and popularity are low, resulting in low uplink business rate, and cannot well support high-speed symmetrical data communication services, such as multimedia conferences, video conferences and network telephone etc. Therefore, how to increase the uplink bandwidth of the cognitive TD-LTE network is a research direction in the field of cognitive radio.

Cognitive TD-LTE wireless network system includes main system and secondary system. The main system refers to the traditional radio system authorized by the frequency management department to legally use a certain carrier frequency. The secondary system refers to the use of the carrier frequency authorized to the primary system or other spectrum resources not used by the primary system. The use of the carrier frequency by the secondary system must not cause interference to the primary system, so it is required to be able to quickly and reliably perceive the use of the authorized carrier frequency by the primary system.

At the current stage, there are two deficiencies in cognitive TD-LTE wireless networks: on the one hand, when the primary system requests to use its authorized carrier frequency, users in the secondary system that do not support carrier frequency aggregation must deactivate the carrier frequency and force switching to its own authorized frequency. Immediate handover of the macro base station may lead to user service interruption and service quality will be greatly reduced, and these affected users will bring a lot of signaling consumption during the handover process. On the other hand, when the overlap between the coverage area of the macro base station and the protected area of the primary system is relatively small, since the macro base station of the secondary system uses omnidirectional antennas, although the downlink transmission of some macro users may be interrupted, their uplink The link is still usable. Most of the secondary users in the coverage area of the macro base station can continue to use the carrier frequency of the primary system, and there is no need to completely stop it. When the macro base station deactivates the carrier frequency, the throughput of the uplink is reduced, and the service quality of the secondary user communication is reduced. Therefore, when the primary system requests to use its authorized carrier frequency, on the premise of not reducing the service quality of the TD-LTE system, making the secondary system fully utilize the carrier frequency of the primary system is one of the ways to increase the uplink bandwidth of the cognitive network. Effective Ways.

Contents of the invention

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an uplink enhancement method based on a geographic location database. The method can make full use of carrier frequency resources in the LTE system and increase uplink throughput.

For realizing above-mentioned purpose of the invention, the present invention adopts following technical scheme:

A method for enhancing an uplink based on a geographic location database, comprising the steps of:

The main system sends a request for recovering the available carrier frequency and protection area information to the geographic location database;

The geographic location database sends the release command of the available carrier frequency and the protection area information to the affected base station;

The base station estimates the interference of the served users to the main system, and divides the users into different areas according to the interference;

The base station allocates scheduling information of uplink and downlink carrier frequencies for the users in different areas;

The base station notifies the geographic location database to update the use information of the available carrier frequency.

Wherein preferably, the protection area information includes the reference signal transmission power of the primary system, the cell number, and the interference value of the secondary system allowed by the primary system.

Preferably, the available carrier frequency is the cognitive carrier frequency provided by the geographic location database for the secondary system or other carrier frequencies not used by the primary system temporarily.

Wherein preferably, the geographic location database includes a geographic location database and a local database;

The geolocation database includes longitude and latitude coordinates, UHF channel numbers, equivalent isotropic radiated power, and secondary network information;

The local database includes summer echo information in the local polar region, the longitude and latitude coordinates of the cognitive network, the registered cognitive network ID, and the current frequency band, coverage, transmission power, allowable interference and traffic load of the cognitive network.

Wherein preferably, the process of dividing the area by the base station further includes the following steps:

Determine new transmission power according to the available carrier frequency information in the geographic location database, and mark users within the adjusted coverage as the first area;

sending a path loss measurement instruction to the main system to users outside the first area, and the users measure and decide whether to report measurement information;

Mark the user reporting the measurement information as the second area; otherwise, mark it as the third area.

Wherein preferably, the information of the available carrier frequency includes the allowed carrier-to-interference ratio, interference level and the protection area information.

Preferably, the process of the user measuring and deciding whether to report the measurement information further includes the following steps:

receiving the reference signal transmitted by the primary system, and measuring the received power of the reference signal of the user;

Estimating the downlink path loss of the primary system according to the received power and the transmission power of the primary system reference signal;

Estimating the received signal power of the primary system according to the downlink path loss and the configured uplink transmission power;

If the received signal power of the primary system is less than or equal to the allowable interference value of the secondary system of the primary system, report measurement information to the base station; otherwise, do not report.

Wherein preferably, the formula for estimating the downlink path loss of the primary system is:

PL _i ＝PT _-RS- RSRP _{higerLayerfiltered}

Wherein, PL _i represents the downlink path loss of the primary system; PT _-RS represents the transmission power of the reference signal of the primary system; RSRP _{higerLayerfiltered} represents the received power of the reference signal of the user.

Wherein preferably, the formula for estimating the received signal power of the primary system is

I _{UEi-Pr_eNB} ＝P _{T-UEi-PL i}

Wherein, I _{UEi-Pr_eNB} represents the received signal power of the primary system, and PT _-UEi represents the uplink transmission power.

Wherein preferably, the scheduling information includes:

Authorized carrier frequencies for uplink and downlink use in the first region and the available carrier frequencies;

The uplink of the second area uses the authorized carrier frequency and the available carrier frequency, and the downlink uses the authorized carrier frequency;

The uplink and downlink of the third area use authorized carrier frequency.

The uplink enhancement method based on the geographical location database provided by the present invention can make more users continue to use the carrier frequency as much as possible when the main system requests to use the carrier frequency, improves the carrier frequency utilization rate of the LTE network, and ensures that the entire System communication quality of service.

Description of drawings

Fig. 1 is a schematic diagram of an application scenario in which a primary system and a secondary system coexist in the present invention;

FIG. 2 is a schematic flowchart of an uplink enhancement method provided by the present invention;

FIG. 3 is a schematic diagram of interactive signaling of the uplink enhancement method provided by the present invention;

FIG. 4 is a schematic diagram of the area division of the macro base station in the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The invention is applicable to the network where the main system and the secondary system coexist. Wherein, the cognitive LTE network is used as a secondary system to connect with the primary system through a geographic location database. As shown in Fig. 1, the current LTE system includes two base stations: a macro base station and a pico base station. There are two available carrier frequencies f0 and f1 in this system. The carrier frequency f0 is an authorized carrier frequency, and the carrier frequency f1 is a cognitive carrier frequency provided by a geographic location database according to the geographic location information of the macro base station or an available carrier frequency not used by other main systems temporarily. In order to improve system throughput and ensure service quality, the macro base station of the LTE system occupies the carrier frequency f0 to form a primary cell (Primary cell, abbreviated as Pcell); the carrier frequency f1 provided by the geographic location database is a secondary cell (Secondary cell, abbreviated as Scell). ), and the pico cell formed by the pico base station also uses the carrier frequency f1 provided by the geographic location database as a hotspot. Within the coverage of the macro base station, there are a large number of users that support spectrum aggregation and users that do not support spectrum aggregation. When the base station of the primary system of another network requests to use the carrier frequency f1, the communication between the macro base station and the pico base station will be affected because the carrier frequency f1 is occupied by other primary systems.

Referring to Fig. 2, the uplink enhancement method based on the geographic location database provided by the present invention includes the following steps: the main system sends back the request of the available carrier frequency and the protection area information to the geographic location database; the geographic location database sends the affected base station The release command of the available carrier frequency and the protection area information; the base station estimates the interference of the served users to the main system, and divides the users into different areas according to the interference; the base station allocates uplink and downlink carrier frequencies for users in different areas Scheduling information; the base station notifies the geographical location database to update the usage information of the available carrier frequency. The invention can effectively use the carrier frequency resource of the primary system by the secondary system without affecting the primary system, and improve the throughput and service quality of the system. Since the base stations affected by the primary system include macro base stations and pico base stations, the steps of the present invention will be described in detail below with reference to 2 and FIG. 3 taking the macro base station as a specific embodiment.

Step 1: The base station of the main system sends a request for retrieving the carrier frequency f1 and its protected area information to the geographic location database.

When the user of the main system requests to use the carrier frequency f1, the base station of the main system or other authorized operator sends a request to withdraw the carrier frequency f1 to the geographic location database, requesting the macro base station using the carrier frequency f1 in its protection area to release the carrier frequency resources . When the main system sends a carrier frequency recovery request, it needs to send its preset protection area information to the geographic location database. The geographic location database needs to store the protection area information sent by the main system, and the carrier frequency f1 is used as the authorized frequency of the main system. When the secondary system is using the carrier frequency, the geographic location database ensures that the primary system is not interfered with according to the usage information of the carrier frequency f1. The information of the protection area includes the reference signal transmission power PT _-RS of the primary system, the cell ID, and the interference value I ₀ of the secondary system allowed by the primary system. Within the protected area, the use of the carrier frequency f1 is not permitted because interference from the secondary system is detrimental to the primary system. Outside the protection area, the interference of the secondary system is somewhat tolerable, so the secondary system decides whether to release the carrier frequency resource according to the information of the protection area.

Step 2, the geographic location database sends the carrier frequency release command and the protection area information of the main system to the affected macro base station.

The geographic location database in the present invention includes a geographic location database and a local database. Usually the geolocation database is deployed in a large geographical area, and the stored information includes: longitude and latitude coordinates, UHF channel number, equivalent isotropic radiated power, and secondary network information. Among them, when the entire area is gridded, the longitude and latitude coordinates represent the grid center; the equivalent isotropic radiated power depends on the location and channel number of the secondary system. Secondary system information includes system number, geographic location, and ID information in its local database. On the other hand, local databases are usually deployed in smaller geographic areas to provide more detailed system information for the decision-making process. After the cognitive network system network is registered, it needs to report the local carrier frequency utilization information to the local database. The local database stores, but is not limited to, the following information: summer echo information about the mid-level of the local polar region, longitude and latitude coordinates of the cognitive network, registered secondary system IDs, and the current frequency band, coverage, and transmit power of the cognitive network. Tolerate interference, traffic load, etc.

The geographic location database provides the secondary system with available cognitive carrier frequencies or other available carrier frequencies not used by the primary system. When a primary system withdraws the carrier frequency f1, the throughput of the secondary system using the carrier frequency f1 will be affected accordingly. In order to prevent the secondary system from interfering with the communication of the main system, the geographic location database searches for the location and coverage of the main system according to the protected area information sent by the main system after receiving the request from the main system or an authorized operator to use the carrier frequency f1 ; After information such as the position of the main system is determined, the geographic location database determines which macro base stations around the main system use carrier frequency f1, and will cause interference to the main system, and send a release carrier frequency f1 command to these affected macro base stations; At the same time, the protection area information of the main system is sent to the macro base station according to a certain information format.

Step 3, the macro base station estimates the interference of the served macro users to the primary system, and divides the macro users into different areas according to the interference.

After the macro base station receives the carrier frequency release command from the geographic location database, it does not directly release the carrier frequency f1 of the main system; The macro user measures the path loss information to the primary system, etc., and estimates the interference of the macro user to the primary system; according to the estimation result, it is determined which macro users can continue to use the carrier frequency f1 of the primary system, and which macro users must be released. In the present invention, according to the interference situation to the main system, the macro user is divided into three areas, that is: the area without interference to the main system, the uplink and downlink of this area can continue to use the carrier frequency f1; the interference to the main system is within the allowable range In the area within the area, the uplink of this area can continue to use the carrier frequency f1; in the area where there is harmful interference to the main system, the uplink and downlink of this area disable the carrier frequency f1. By dividing the area of the macro base station, the secondary system can use carrier frequency resources as much as possible, and the communication service quality of the system can be effectively improved. Referring to Fig. 4, the method for dividing the area of the macro base station in the present invention is introduced below, which specifically includes the following steps:

S301, according to the information of the carrier frequency f1 in the geographic location database, determine a new transmission transmission power, and mark the macro users within the adjusted coverage area as area 1.

The geo-location database provides carrier frequency f1 information for the secondary system as well as availability information for the primary system. Since the macro base station uses an omnidirectional antenna, deactivation of the carrier frequency f1 may cause downlink interruption of some macro users, but the uplink is still available. In order to keep the downlink available, the transmit power of the macro base station needs to be adjusted. In order to ensure the communication quality of the primary user, before using the carrier frequency resources of the geographic location database, the macro base station of the secondary system learns the carrier frequency f1 information through the geographic location database.

The geographic location database receives the request for using the carrier frequency f1 from the secondary system, and will provide the information of the carrier frequency and the necessary conditions to ensure the communication of the primary user, such as: the allowed Signal-Interference-Ratio (SIR for short) ), interference level and protection area etc. information. Through these information and the location report of the secondary network, etc., the maximum transmission power allowed by the available blank channel can be determined.

When the primary system requests to use f1, the protection area of the primary system overlaps with the coverage area of the macro base station. In order to ensure the communication of the primary system, it is necessary to reduce the transmission power of the macro base station according to the information of the carrier frequency f1 used by the primary system. According to the recorded location information of the macro users, the macro base station marks the macro users within its coverage area after power adjustment as area 1. Macro users in area 1 do not interfere with the main system, so authorized carrier frequency f0 and available carrier frequency f1 can be used in both uplink and downlink.

S302, sending a path loss measurement instruction to the main system to the macro user outside the area 1, and the macro user decides whether to report the measurement information after the measurement.

Since area 1 has no interference to the primary system, judge the interference of other macro users to the primary system. The traditional method needs to estimate the path loss from the macro base station to each primary system receiver when judging the interference situation of the macro user, but this method is relatively difficult to implement. In the present invention, the macro base station sends the measurement instruction for the path loss of the main system to the macro users outside the area 1. Each macro user receives the reference signal (primary synchronization signal/secondary synchronization signal) transmitted by the primary system base station, and estimates the downlink path loss from the primary system base station to the macro user. Then, according to the uplink transmission power of the macro user, the power of the master system base station to receive the signal transmitted by the macro user is estimated. According to the receiving power of the primary system and the interference value of the secondary system allowed by the primary system, the interference situation of the secondary system to the primary system is further judged. The detailed process of the macro user to perform the measurement is introduced in detail below.

First, the macro user receives the reference signal of the primary system and measures the received power of the reference signal. According to the transmission power of the reference signal transmitted by the base station of the primary system and the received power of the measured reference signal, the downlink path loss PL _i of the primary system to the direction of the macro user is estimated, see the following formula:

PL _i =PT _-RS- RSRP _{higerLayerfiltered} (1)

Wherein, PT _-RS represents the transmission power of the primary system reference signal, and RSRP _{higerLayerfiltered} represents the measured received power of the macro-user reference signal, and the unit is dB.

Secondly, according to the uplink transmission power of the macro user and the estimated downlink path loss from the base station of the primary system to the macro user, the power I _{UEi-Pr_eNB} of the received signal of the primary system is estimated. See the formula below:

I _{UEi - Pr_eNB} = P _{T - UEi} -PL _i (2)

Among them, PT _-UEi represents the uplink transmission power of the macro user, and the unit is dB. In the present invention, the uplink loss is estimated, and the downlink path loss is regarded as the uplink path loss. Estimate the received signal power of the primary system according to the path loss of the uplink and the transmission power of the uplink configured by the macro user. According to the power and the allowable interference value of the main system, the range of harmful interference can be determined.

Finally, judge the magnitude of the estimated received signal power of the primary system and the allowable interference value of the secondary system of the primary system: if the received signal power of the primary system is less than or equal to the allowable interference value of the secondary system of the primary system, the macro user reports this time to the macro base station If the received signal power is greater than the interference value of the secondary system allowed by the primary system, the macro user will not report the measurement information.

S303, the macro base station marks the macro users that report measurement information as area 2, and marks the macro users that do not report measurement information as area 3.

If the received signal power of the primary system base station is less than or equal to the allowable secondary system interference value of the primary system, it means that the current macro user will not cause harmful interference to the primary system when using the geographic location database carrier frequency f1 in the uplink. The macro user needs to send an instruction containing the measurement result to the macro base station serving it, and the macro base station marks the macro user as being located in area 2 after receiving the measurement information instruction. The uplink of the macro user is allowed to use the carrier frequency f1 provided by the geographic location database, while the downlink is not allowed to use. And when the received power of the primary system is greater than the interference value of the secondary system allowed by the primary system, the interference of the macro user is harmful to the primary system. The macro user will not trigger an instruction to report the measurement result to the macro base station. The macro base station divides the macro users that have not reported the measurement command into area 3, and the macro users in this area are not allowed to use the carrier frequency f1.

Step 4, the macro base station allocates uplink and downlink carrier frequency scheduling information to macro users in different areas. The macro base station notifies the macro users in the three areas of their corresponding uplink and downlink carrier frequency scheduling information, and sends additional instruction information of the enhanced uplink mechanism to the macro users who can continue to use the carrier frequency f1. Please refer to Table 1 for the uplink and downlink carrier frequency usage of macro users in different areas.

uplink downlink area 1 f0, f1 f0, f1 area 2 f0, f1 f0 area 3 f0 f0

Table 1 The uplink and downlink carrier frequency usage of macro users in different areas

The macro users in area 1 are not within the protection area and will not cause interference, so their uplink and downlink can use authorized carrier frequency f0 and carrier frequency f1. Macro users in area 2 are located outside area 1, not within the protected area of the main system. Since the interference generated by macro users in this area is tolerable, the use of carrier frequency f0 and carrier frequency f1 can be limited: that is, the uplink uses carrier frequency f0 and carrier frequency f1, and the downlink uses only authorized carrier frequency f0. Area 3 is located in the protection area, and the macro-user interference of the secondary system in this area is harmful to the primary system. Therefore, its uplink and downlink can only use the carrier frequency f0, but cannot use the carrier frequency f1. Through the present invention, more macro users can continue to use the carrier frequency f1 as much as possible, realizing the enhancement of the uplink of the LTE system, and at the same time ensuring the communication service quality of the secondary system.

Step 5, the macro base station notifies the geographic location database to update the use information of the carrier frequency. After the macro base station allocates the scheduling information to the macro users, it needs to notify the geographic location server to update the carrier frequency used in the current area covered by the macro base station, which helps the geographic location database manage carrier frequency resources, and effectively avoids the secondary system from causing damage to the primary system. interference.

In the uplink enhancement method provided by the present invention, when the primary system requests to use the carrier frequency f1, the geographic location database will send a carrier frequency release command to the relevant macro base station, and notify the primary system of the protected area information to the macro base station. The macro base station divides its coverage into three areas according to the interference of the macro users to the main system; and reasonably allocates uplink and downlink scheduling information to the macro users in the three areas. The invention enables the macro base station to self-adaptively schedule more secondary users to continue to use the carrier frequency resources of the geographic location database without causing interference to the primary user, realize uplink enhancement, and ensure the communication service quality of the secondary system.

The invention is suitable for urban hotspot areas where people are relatively concentrated and areas where cellular network coverage is relatively dense. In these areas, there are a large number of mobile terminals in the LTE network, and the load and traffic are heavy. The present invention can effectively reduce energy loss and unnecessary signaling interaction in route switching or connection reestablishment, reduce service loss of mobile terminals, and ensure service quality of the entire LTE system.

The uplink enhancement method based on the geographic location database provided by the present invention has been described in detail above. For those skilled in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims (10)

1. a kind of uplink enhancing method based on geographic position database, it is characterized in that comprising the steps: The main system sends a request for recovering the available carrier frequency and protection area information to the geographic location database; The geographic location database sends the release command of the available carrier frequency and the protection area information to the affected base station; The base station estimates the interference of the served users to the main system, and divides the users into different areas according to the interference; The base station allocates scheduling information of uplink and downlink carrier frequencies for the users in different areas; The base station notifies the geographic location database to update the use information of the available carrier frequency. 2. The uplink enhancement method according to claim 1, characterized in that: The protection area information includes the reference signal transmission power of the primary system, the cell number, and the interference value of the secondary system allowed by the primary system. 3. The uplink enhancement method according to claim 1, characterized in that: The available carrier frequency is the cognitive carrier frequency provided by the geographic location database for the secondary system or other carrier frequencies not used by the primary system temporarily. 4. The uplink enhancement method according to claim 1, characterized in that: The geographic location database includes a geographic location database and a local database; The geolocation database includes longitude and latitude coordinates, UHF channel numbers, equivalent isotropic radiated power, and secondary network information; The local database includes summer echo information in the local polar region, the longitude and latitude coordinates of the cognitive network, the registered cognitive network ID, and the current frequency band, coverage, transmission power, allowable interference and traffic load of the cognitive network. 5. The uplink enhancement method according to claim 1, characterized in that the process of the base station dividing areas further comprises the steps: Determine new transmission power according to the available carrier frequency information in the geographic location database, and mark users within the adjusted coverage as the first area; sending a path loss measurement instruction to the main system to users outside the first area, and the users outside the first area measure and decide whether to report measurement information; Mark the user reporting the measurement information as the second area; otherwise, mark it as the third area. 6. The uplink enhancement method according to claim 5, characterized in that: The information of the available carrier frequency includes the allowed carrier-to-interference ratio, interference level and the protection area information. 7. The uplink enhancement method according to claim 5, characterized in that the process of the user measuring and deciding whether to report measurement information further comprises the following steps: receiving the reference signal transmitted by the primary system, and measuring the received power of the reference signal of the user; Estimating the downlink path loss of the primary system according to the received power and the transmission power of the primary system reference signal; Estimating the received signal power of the primary system according to the downlink path loss and the configured uplink transmission power; If the received signal power of the primary system is less than or equal to the allowable interference value of the secondary system of the primary system, report measurement information to the base station; otherwise, do not report. 8. The uplink enhancement method according to claim 7, characterized in that: The formula for estimating the downlink path loss of the primary system is: PL _i ＝PT _-RS- RSRP _{higerLayerfiltered} Wherein, PL _i represents the downlink path loss of the primary system; PT _-RS represents the transmission power of the reference signal of the primary system; RSRP _{higerLayerfiltered} represents the received power of the reference signal of the user. 9. The uplink enhancement method according to claim 7, characterized in that: The formula for estimating the received signal power of the primary system is I _{UEi-Pr_eNB} ＝P _{T-UEi-PL i} Wherein, I _{UEi-Pr_eNB} represents the received signal power of the primary system, and PT _-UEi represents the uplink transmission power. 10. The uplink enhancement method according to claim 5, wherein the scheduling information comprises: Authorized carrier frequencies for uplink and downlink use in the first region and the available carrier frequencies; The uplink of the second area uses the authorized carrier frequency and the available carrier frequency, and the downlink uses the authorized carrier frequency; The uplink and downlink of the third area use authorized carrier frequency.