CN101500297B - Method, device and system for measuring different system pilot signal strength and selecting base station - Google Patents

Abstract

The invention discloses a method and a device for measuring the pilot signal intensity of different systems, aiming at solving the problem that the pilot signal intensity of different systems can not be compared. The technology compares the intensity of pilot signals of each base station received by terminal equipment according to a maximum modulation encoding rank which the terminal equipment can support in each base station, thus leading the pilot signal intensity of different systems to have comparability and providing reference for resource cooperation among systems. The invention also discloses a method for selecting the base stations and a communication system. The base stations to be accessed are selected for the terminal equipment according to comparison results of the pilot signal intensity of each base station received by the terminal equipment and information of loads born by each base station, thus providing effective reference for resource management (such as admission control, switching, data distribution, data dispatching and the like) of multimode systems, multi-frequency point systems or heterogeneous systems.

Description

Method, device and system for measuring different system pilot signal strength and selecting base station

technical field

The invention relates to the communication field, in particular to a technique for measuring the strength of pilot signals between different systems. the

Background technique

With the rapid development of wireless communication technology, people hope to realize the application of high data rate, network integration and integration of discrete spectrum in the future 4G (fourth generation) mobile communication system, which poses challenges for the communication system to make full use of limited wireless resources . the

At present, the communication systems that can make full use of wireless resources mainly include:

A multi-mode system means that a base station can support multiple different modes at the same time, and can work in multiple modes at the same time. For example, the base station works in both LTE (Long Term Evolution, long-term evolution research project) FDD (Frequency Division Duplex, frequency division multiplexing) and LTE TDD (Time Division Duplex time division multiplexing) modes. the

The multi-frequency point system means that one base station can support multiple frequency bands at the same time, and can work under multiple frequency points at the same time. For example: LTE TDD base station works at 2.0-2.1GHz and 3.0-3.2Ghz at the same time. the

A heterogeneous system, for multiple different wireless networks. Various heterogeneous wireless networks work together, and wireless resources of each wireless network can be shared. the

It can be seen from the characteristics of the above-mentioned multi-mode system, multi-frequency point system or heterogeneous system that they all have abundant wireless resources. Through resource cooperation between different mode systems, different frequency point systems or heterogeneous systems, the maximum performance of each system can be fully exerted, so as to achieve high data rate, network convergence and integration in the future 4G (fourth generation) mobile communication system Important applications of discrete spectrum. the

At present, when system resource scheduling or system switching is performed, it is mainly based on the channel state estimation value of the link, and the estimation value is calculated through the measured pilot strength. the

In a multi-mode system, a multi-frequency point system or a heterogeneous system, the terminal equipment will receive pilot signals from different mode systems or different frequency point systems. Since the antenna configuration, fading characteristics, coverage, and network planning of different mode systems or systems at different frequency points may be inconsistent, the methods for calculating the pilot signal strength of each system may be inconsistent, so different mode systems or different frequency point systems The pilot strength of each system is not directly comparable, so that when resources are coordinated between systems, it is impossible to effectively evaluate the relative strength of the pilot strength of each system, thereby affecting the resource coordination between systems.

Contents of the invention

The present invention provides a method for measuring the strength of pilot signals in different systems, a method for selecting base stations, a device for measuring the strength of pilot signals in different systems, and a communication system, so that the strengths of pilot signals in different systems are comparable and provide resources for inter-system cooperation. for reference. the

Embodiments of the present invention are realized through the following technical solutions:

An embodiment of the present invention provides a method for measuring the strength of different system pilot signals, the method comprising:

According to the channel quality parameters measured by the terminal equipment, determine the series corresponding to the maximum modulation and coding mode that the terminal equipment can support under the corresponding base station; and

According to the number of stages corresponding to the modulation and coding mode, the strengths of the pilot signals of each base station received by the terminal equipment are compared. the

The embodiment of the present invention also provides a method for selecting a base station, the method comprising:

According to the channel quality parameters measured by the terminal equipment, determine the series corresponding to the maximum modulation and coding mode that the terminal equipment can support under the corresponding base station;

According to the series corresponding to the modulation and encoding method, compare the strength of the pilot signal of each base station received by the terminal equipment;

According to the comparison result of the pilot signal strength of each base station and the load information carried by each base station, a base station to be accessed is selected for the terminal device. the

The embodiment of the present invention also provides a pilot signal strength measuring device, including:

The determination unit is used to determine the series corresponding to the maximum modulation and coding mode that the terminal equipment can support under the corresponding base station according to the channel quality parameters measured by the terminal equipment;

The weighing unit is configured to compare the strengths of the pilot signals of the base stations received by the terminal equipment according to the series corresponding to the modulation and coding scheme. the

The embodiment of the present invention also provides another device for measuring pilot signal strength, which includes:

The obtaining unit is configured to obtain the series corresponding to the maximum modulation and coding mode that each base station can support according to the information reported by each base station; the series corresponding to the maximum modulation and coding mode that each base station can support for the current terminal equipment is the Determined according to the channel quality parameter measurement report reported by the terminal equipment;

The weighing unit is configured to compare the strengths of the pilot signals of each base station received by the terminal equipment according to the series of modulation and coding schemes. the

The embodiment of the present invention also provides a kind of communication system, this communication system comprises:

Multiple base stations are used to determine the series corresponding to the maximum modulation and coding mode that the terminal equipment can support under the base station according to the channel quality parameters measured by the terminal equipment;

The pilot signal strength measuring device is used to compare the strength of the pilot signal of each base station received by the terminal equipment according to the series corresponding to the maximum modulation and coding mode determined by the base station;

The control device is used for selecting a base station to be accessed for the terminal equipment according to the comparison result of the pilot signal strength of each base station and the load information carried by each base station. the

The embodiment of the present invention also provides another communication system, which includes:

The pilot signal strength measurement device is used to determine the series corresponding to the maximum modulation and coding mode that the terminal equipment can support under the corresponding base station according to the channel quality parameters measured by the terminal equipment; The series corresponding to the modulation and coding mode compares the strength of the pilot signal of each base station received by the terminal equipment; the control device is used to measure the strength of the pilot signal of each base station received by the terminal equipment according to the strength of the pilot signal The comparison result and the load information carried by each base station select a base station to be accessed for the terminal device. the

It can be seen from the above-mentioned technical solutions provided by the embodiments of the present invention that in the method for measuring the strength of different-system pilot signals or the device for measuring the strength of different-system pilot signals provided by the embodiments of the present invention, by determining the The number of series corresponding to the maximum modulation and coding method compares the strength of the pilot signal of each base station received by the terminal equipment, so that the strength of the pilot signal of different systems can be compared and provide a reference for inter-system resource cooperation. the

In the method or communication system for selecting a base station provided by the embodiments of the present invention, the intensity of the pilot signal of each base station received by the terminal device is compared according to the series corresponding to the maximum modulation and coding mode that the terminal device can support in each base station; and According to the comparison result of the pilot signal strength of each base station received by the terminal equipment and the load information carried by each base station, select the base station to be accessed for the terminal equipment, which can be a multi-mode system, a multi-frequency point system or a heterogeneous System resource management (such as admission control, handover, data distribution, data scheduling, etc.) provides an effective reference. the

Description of drawings

Figure 1 is a schematic diagram of the communication system and its supported modulation and coding methods;

Fig. 2 is the flowchart of the first embodiment of the present invention;

Fig. 3 is a schematic diagram of an application scenario of the first embodiment of the present invention;

Fig. 4 is the flowchart of the second embodiment of the present invention;

Fig. 5 is the flowchart of the third embodiment of the present invention;

Fig. 6 is the structural representation of the fifth embodiment of the present invention;

Fig. 7 is the structural representation of the sixth embodiment of the present invention;

Fig. 8 is the structural representation of the seventh embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an eighth embodiment of the present invention. the

Detailed ways

In B3G systems (such as LTE, WiMAX, HSPA (High Speed Packet Access, high-speed packet access)), AMC (Adaptive Modulation Coding, adaptive coding and modulation) technology is usually used, while for 2G and 3G systems (such as GSM system, WCDMA system, TD-SCDMA system), a fixed modulation and coding method is usually used. As shown in Figure 1, LTE, WiMAX, and HSPA systems use AMC technology to select a modulation and coding method suitable for the current channel from QPSK, 16QAM, 64QAM and other modulation and coding methods. GSM systems, WCDMA systems, and TD-SCDMA systems use QPSK Modulation coding method. the

Since MCS (Modulation Coding Scheme, Modulation Coding Scheme) reflects the quality of the channel, in the B3G system, the maximum modulation that the terminal device can support under the base station can be estimated according to the strength of the base station pilot signal currently received by the terminal device. coding method, and the number of stages corresponding to the modulation and coding method can be obtained. The greater the strength of the pilot signal, the higher the level of the corresponding modulation and coding scheme. In this way, by comparing the MCS series between the systems, the relative strength of the pilot signal strength between the systems can be determined. The same applies to 2G and 3G systems using fixed modulation and coding methods. the

Based on the above factors, in the embodiment of the present invention, the MCS is used as an intermediary parameter to provide comparability for the strength of the pilot signal strength of each base station. the

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

The first embodiment of the present invention provides a method for measuring the strength of pilot signals of different systems, and its implementation process is shown in Figure 2, including the following steps:

In steps 101a and 101b, the terminal device periodically reports channel quality parameter measurement reports to each base station in the candidate set. the

The measurement report includes at least: a channel quality parameter that can measure the strength of the base station pilot signal received by the terminal equipment, such as Ec Channel quality parameters such as /No (energy/noise power spectral density) parameters, RSSI (Received Signal Strength Indicator) parameters in WLAN (Wireless Local Area Network, wireless local area network) systems. the

Step 102a, step 102b, the base station determines the maximum MCS that the terminal device can support under the corresponding base station (that is, the highest level of modulation and coding schemes whose current channel quality can guarantee the block error rate) and the corresponding MCS under this MCS according to the measurement report. The data transmission error rate, such as BLER (BLock Error Rate, block error rate, is an important parameter used to measure the error rate of data packets in the B3g system), FER (FrameError Rate, frame error rate, is used in 2G/3G systems An important parameter to measure the error rate) or BER (Bit Error Rate, bit error rate), etc. the

The base station side can determine the strength of the base station pilot signal received by the terminal device under the current pilot channel according to the channel quality parameter, and then determine the maximum modulation code that the terminal device can support under the corresponding base station according to the pilot signal strength mode and the series corresponding to the modulation and coding mode, that is, MCS. the

The base station side generally stores the corresponding relationship between the strength of the base station pilot signal, the modulation and coding mode supported by the base station, and the MCS; the corresponding relationship can be based on the CPICH The Es/No parameter and the simulation curve obtained by simulating the block error rate at the receiving end; according to the corresponding relationship, the base station can determine the maximum modulation and coding mode that the terminal equipment can support under the base station and the The number of stages corresponding to the modulation and coding scheme, that is, MCS. the

According to the detected error rate of the data coding block, the base station can obtain the data transmission error rate corresponding to the number of modulation and coding schemes. The data transmission error rate corresponding to the strength of the base station pilot signal may also be obtained according to the preset correspondence between the pilot strength and the data transmission error rate. the

In step 103a and step 103b, the base station reports the maximum MCS level it can support and the corresponding data transmission error rate under the MCS level to the network master control terminal. the

In step 104, the network master control terminal makes a judgment according to the maximum MCS levels that the terminal equipment can support in each base station, and determines the relative strength of the pilot signal strength of each base station received by the terminal equipment. the

The total network control terminal compares the maximum MCS series that the terminal equipment can support in each base station. The higher the MCS series, the greater the pilot signal strength of the base station received by the terminal equipment. the

For pilot signals with the same MCS series, the strength of the pilot signal can be determined by data transmission error rates such as BLER, FER or BER. The smaller the BLER, FER or BER, the greater the relative strength of the pilot signal. the

The above-mentioned network master control terminal can be physically configured independently, and can also be located in a certain system (such as an LTE system). the

The following uses the application scenario shown in FIG. 3 as an example to describe in detail. In this application scenario, the access candidate sets of the terminal equipment are LTE and WiMAX base stations, and the LTE is the main control station. The terminal equipment is located in a certain cell of the LTE and WiMAX heterogeneous system, and the terminal equipment receives pilot signals from the LTE and WiMAX base stations. the

The terminal equipment periodically reports measurement reports to each base station in the candidate set. Assuming that the channel quality parameter reported by the terminal equipment to the LTE base station is the Es/No parameter of CPICH, and the parameter value is 10.6db, the terminal equipment reports the channel quality to the WiMAX base station The parameter is the Es/No parameter, and the parameter value is 11db. the

The LTE base station side and the WiMAX base station side estimate the MCS series according to the pilot frequency strength respectively. the

The LTE base station and WiMAX base station can simulate the Ec/No parameter of CPICH and the block error rate of the receiving end under Gaussian white noise and different modulation and coding methods, and obtain the modulation and coding according to the channel block error rate curve obtained from the simulation results. The relationship among mode, pilot strength parameter value, MCS series and BLER parameter value is shown in Table 1:

Table 1

According to Table 1, when the pilot strength parameter value of the LTE base station is 10.6db, it can be obtained that the maximum MCS level supported by the LTE base station is 5, and the BLER is 0.0067;

Since the pilot frequency strength of the WiMAX base station is 11db, the maximum MCS series supported by the WiMAX base station is 6, and the BLER is 0.0773. the

Report the MCS series and BLER to the network master control terminal. the

The network master control terminal (which can be located in the LTE base station) determines the pilot signal strength series of the terminal equipment in the LTE and WiMAX base stations according to the MCS series and BLER, and compares the pilot signal strength series of the terminal equipment in each base station according to the pilot signal strength series. Pilot signal strength. the

There are a number of base station pilot signal strength levels stored in the network master control terminal. The base station pilot signal strength level is determined by the network master control terminal according to the MCS series corresponding to the modulation and coding mode and the level corresponding to the BLER parameter, for example:

As shown in Table 2, the corresponding relationship between the modulation and coding method and the MCS series is given, and the corresponding relationship between the BLER parameter and its corresponding level is shown in Table 3. The network master control terminal calculates the base station pilot signal strength Divided into 16 grades, from high to low as follows: 8A, 8B, 7A, 7B...1A, 1B. the

Table 2

table 3

According to the maximum MCS level supported by the WiMAX base station is 6, and the BLER is 0.0773, the network master control terminal determines that the pilot signal strength level of the WiMAX base station is 6B; the network master control terminal determines that the maximum MCS level supported by the LTE base station is 5, and the BLER is 0.0067, and it is determined that the pilot signal strength level of the LTE base station is: 5A. It can be seen that the pilot signal strength of the WiMAX base station is higher than that of the LTE base station. the

After that, the network master control terminal selects the base station to be accessed for the terminal device according to the comparison result of the pilot signal strength of each base station and the load information carried by each base station. the

The second embodiment of the present invention provides a second method for measuring the strength of different system pilot signals. In this method, the user terminal equipment directly reports the channel quality parameter measurement report of each base station to the network master control terminal, and the network master control terminal according to The measurement report obtains the maximum MCS level that the terminal equipment can support in each base station, and determines the relative strength of the pilot signal strength of each base station received by the terminal equipment according to the MCS level. The implementation process is shown in Figure 4, including the following steps:

In step 401, the terminal device periodically reports the channel quality parameter measurement report of each base station in the candidate set to the network master control terminal. the

The measurement report at least includes: a channel quality parameter capable of measuring the strength of the base station pilot signal received by the terminal equipment. It is specifically as the relevant description in the first embodiment, and will not be described in detail here. the

Step 402, based on the measurement report, the network master terminal estimates the maximum MCS that the terminal equipment can support under the corresponding base station and the corresponding data transmission error rate under this MCS, such as BLER, FER or BER. the

Step 403 , the network master control terminal makes a judgment according to the maximum MCS levels that the terminal equipment can support in each base station, and determines the relative strength of the pilot signal strength of each base station received by the terminal equipment. the

The specific implementation of step 403 is the same as the relevant description in the first embodiment, and will not be described in detail here. the

Afterwards, the network master control terminal selects the base station to be accessed for the terminal device according to the comparison result of the pilot signal strength of each base station received by the terminal device and the load information carried by each base station. the

The third embodiment of the present invention provides a third method for measuring the strength of different system pilot signals. In this method, its implementation process is shown in Figure 5, including the following steps:

In step 501, the terminal device obtains the maximum MCS that it can support under the corresponding base station and the data transmission error rate corresponding to the MCS level, such as BLER, FER or BER, according to the measured channel quality parameters. the

In step 502, the terminal device determines the relative strength of the pilot signal strength of each base station received by the terminal device according to the MCS level it can support under each base station and the data transmission error rate corresponding to the MCS level. the

The specific determination method is the same as the relevant description in the first embodiment, and will not be described in detail here. the

Step 503, the terminal equipment reports the judgment report of the relative strength of the pilot signal strength of each base station to the network master control terminal. the

Afterwards, the network master control terminal selects the base station to be accessed for the terminal device according to the comparison result of the pilot signal strength of each base station received by the terminal device and the load information carried by each base station. the

The fourth embodiment of the present invention provides a method for selecting a base station, the method comprising:

First, according to the channel quality parameters measured by the terminal equipment, determine the maximum modulation and coding mode series that the terminal equipment can support under the corresponding base station; according to the modulation and coding mode series, compare the pilot signals of each base station received by the terminal equipment strength. The specific processing is the same as the relevant description in the above embodiment, and will not be described in detail here. the

Secondly, according to the comparison result of the pilot signal strength of each base station and the load information carried by each base station, a base station to be accessed is selected for the terminal device. For example, when the pilot signal strength of base station 1 is stronger than that of other base stations, and the load traffic of base station 1 is relatively small, base station 1 may be selected for terminal equipment to access. the

The fifth embodiment of the present invention provides a device for measuring pilot signal strength, the structure of which is shown in FIG. 6 , including: a determining unit 601 and a measuring unit 602 . the

The determination unit 601 is configured to determine the maximum number of modulation and coding schemes that the terminal equipment can support under the corresponding base station according to the channel quality parameters measured by the terminal equipment. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The measuring unit 602 is configured to compare the strengths of the pilot signals of the various base stations received by the terminal equipment according to the series of modulation and coding schemes. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above-mentioned determining unit 601 is further configured to obtain a data transmission error rate corresponding to the order of the modulation and coding scheme. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

Correspondingly, the above-mentioned measurement unit 602 is also used to compare the values of the pilot signals of each base station received by the terminal device according to the data transmission error rate when the maximum series of modulation and coding schemes that the terminal device can support in each base station are the same. strength. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above-mentioned device for measuring the strength of the pilot signal can be integrated in the terminal equipment, and can also be integrated in the network control equipment. the

The sixth embodiment of the present invention provides a device for measuring pilot signal strength, the structure of which is shown in FIG. 7 , including: an obtaining unit 701 and a measuring unit 702 . the

The obtaining unit 701 is configured to obtain the maximum series of modulation and coding schemes that the current terminal equipment can support in each base station according to the information reported by each base station; the maximum series of modulation and coding schemes that the current terminal equipment can support in each base station is The base station determines it according to the channel quality parameter measurement report reported by the terminal equipment. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The measuring unit 702 is configured to compare the strengths of the pilot signals of the various base stations received by the terminal equipment according to the series of modulation and coding schemes. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above obtaining unit 701 is further configured to obtain the data transmission error rate corresponding to the number of modulation and coding schemes according to the information reported by the base station. The data transmission error rate is determined by each base station. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

Correspondingly, the above-mentioned measurement unit 702 is also used to compare the pilot signal received by the terminal device from each base station according to the data transmission error rate when the maximum series of modulation and coding schemes that the terminal device can support in each base station is the same. strength. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above device for measuring the strength of the pilot signal is integrated in the network control equipment. the

The seventh embodiment of the present invention provides a communication system, the structure of which is shown in FIG. 8 , including: a plurality of base stations 801 , a pilot signal strength measuring device 802 and a control device 803 . the

The multiple base stations 801 are configured to determine the maximum number of modulation and coding schemes that the terminal equipment can support under the base station respectively according to the channel quality parameters measured by the terminal equipment. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The pilot signal strength measuring means 802 is configured to compare the strengths of the pilot signals of each base station received by the terminal equipment according to the maximum series of modulation and coding schemes determined by the base station 801 . The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The control means 803 is configured to select a base station to be accessed for the terminal device according to the comparison result of the pilot signal strength of each base station received by the terminal device and the load information carried by each base station. the

The above-mentioned base station 801 is further configured to obtain the data transmission error rate corresponding to the order of the modulation and coding scheme. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

Correspondingly, the above-mentioned pilot signal strength measuring device 802 is also used to compare the data transmission error rate received by the terminal equipment from each base station when the maximum series of modulation and coding schemes that the terminal equipment can support in each base station is the same. The strength of the pilot signal. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above-mentioned pilot signal strength measuring device 802 and the above-mentioned control device 803 may be centrally arranged in the network control device. the

The eighth embodiment of the present invention provides a communication system, the structure of which is shown in FIG. 9 , including: a pilot signal strength measuring device 901 and a control device 902 . the

The pilot signal strength measuring device 901 is configured to determine the maximum modulation and coding scheme series that the terminal equipment can support under the corresponding base station according to the channel quality parameters measured by the terminal equipment; The series of encoding modes compares the strength of the pilot signals of each base station received by the terminal equipment. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The control means 902 is configured to select, for the terminal equipment, the base station to be accessed according to the comparison result of the pilot signal strength of each base station received by the terminal equipment by the pilot signal strength measuring means 901 and the load information carried by each base station. base station. the

The pilot signal strength measuring device 901 is also used to obtain the data transmission error rate corresponding to the series of modulation and coding schemes; and when the maximum series of modulation and coding schemes that the terminal equipment can support in each base station are the same, according to The data transmission error rate compares the strength of the pilot signal of each base station received by the terminal equipment. The specific processing is similar to the relevant description in the method embodiments, and will not be described in detail here. the

The above-mentioned pilot signal strength measurement device 901 is set in the terminal equipment; the above-mentioned control device 902 is set in the network control device;

Alternatively, the above-mentioned pilot signal strength measuring device 901 and the above-mentioned control device 902 may be centrally arranged in the network control device. the

It can be seen from the above-mentioned technical solutions provided by the embodiments of the present invention that in the method for measuring the strength of different-system pilot signals or the device for measuring the strength of different-system pilot signals provided by the embodiments of the present invention, according to the maximum The series of modulation and coding methods compares the strength of the pilot signal of each base station received by the terminal equipment, so that the strength of the pilot signal of different systems can be compared and provide a reference for inter-system resource cooperation. the

In the method or communication system for selecting a base station provided by the embodiments of the present invention, the intensity of the pilot signal of each base station received by the terminal device is compared according to the maximum series of modulation and coding schemes that the terminal device can support in each base station; Based on the comparison result of the pilot signal strength of each base station received by the terminal equipment and the load information carried by each base station, the base station to be accessed is selected for the terminal equipment, which can be a multi-mode system, a multi-frequency point system or a heterogeneous system. Resource management (such as admission control, handover, data distribution, data scheduling, etc.) provides effective reference. the

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations. the

Claims (19)

1. A method for measuring inter-system pilot signal strength, the method comprising:

determining the grade corresponding to the maximum modulation coding mode which can be supported by the terminal equipment under the corresponding base station according to the channel quality parameters measured by the terminal equipment; and are

And comparing the intensity of each base station pilot signal received by the terminal equipment according to the level corresponding to the modulation coding mode.

2. The method of claim 1, wherein the determining, according to the channel quality parameter measured by the terminal device, the number of levels corresponding to the maximum modulation and coding scheme that the terminal device can support under the corresponding base station comprises:

determining the intensity of a base station pilot signal received by the terminal equipment according to the channel quality parameter measured by the terminal equipment;

and determining the level corresponding to the maximum modulation coding mode which can be supported by the terminal equipment under the base station according to the strength of the pilot signal of the base station.

3. The method of claim 2, wherein when the number of levels corresponding to the maximum modulation and coding schemes that the terminal device can support at each base station is the same, the method further comprises:

acquiring a data transmission error rate corresponding to the level corresponding to the modulation coding mode;

and comparing the strength of each base station pilot signal received by the terminal equipment according to the data transmission error rate.

4. The method of claim 1, 2 or 3, wherein the channel quality parameters comprise:

an energy to noise power spectral density ratio parameter of the common pilot channel, and/or a received signal strength indication parameter.

5. The method of claim 3, wherein the data transmission error rate comprises:

block error rate BLER, frame error rate FER, or bit error rate BER.

6. A method for selecting a base station, the method comprising:

determining the grade corresponding to the maximum modulation coding mode which can be supported by the terminal equipment under the corresponding base station according to the channel quality parameters measured by the terminal equipment; and are

Comparing the intensity of each base station pilot signal received by the terminal equipment according to the modulation coding mode level; and

and selecting the base station to be accessed for the terminal equipment according to the comparison result of the pilot signal intensity of each base station and the load information carried by each base station.

7. The method as claimed in claim 6, wherein said selecting the base station to be accessed for the terminal device according to the comparison result of the pilot signal strength of each base station and the load information carried by each base station comprises:

and selecting the base station with relatively strong pilot signal strength and relatively small load flow as the base station to be accessed by the terminal equipment.

8. A pilot signal strength measurement apparatus, comprising:

the determining unit is used for determining the grade corresponding to the maximum modulation coding mode which can be supported by the terminal equipment under the corresponding base station according to the channel quality parameters measured by the terminal equipment;

and the measuring unit is used for comparing the strength of the pilot signal of each base station received by the terminal equipment according to the level corresponding to the modulation coding mode.

9. The pilot signal strength measurement apparatus of claim 8,

the determining unit is further configured to obtain a data transmission error rate corresponding to the modulation and coding scheme number;

the measuring unit is further configured to compare the strength of the pilot signal of each base station received by the terminal device according to the data transmission error rate when the number of levels corresponding to the maximum modulation coding scheme that can be supported by each base station by the terminal device is the same.

10. The pilot signal strength measuring apparatus of claim 8 or 9, wherein the pilot signal strength measuring apparatus is integrated in a terminal device, or the pilot signal strength measuring apparatus is integrated in a network control device.

11. A pilot signal strength measurement apparatus, comprising:

the obtaining unit is used for obtaining the grade corresponding to the maximum modulation coding mode which can be supported by each base station according to the information reported by each base station; the level number corresponding to the maximum modulation coding mode which can be supported by each base station of the current terminal equipment is determined by each base station according to a channel quality parameter measurement report reported by the terminal equipment;

and the measuring unit is used for comparing the strength of the pilot signal of each base station received by the terminal equipment according to the level corresponding to the modulation coding mode.

12. The pilot signal strength measurement apparatus of claim 11,

the obtaining unit is further configured to obtain, according to information reported by the base station, a data transmission error rate corresponding to the level corresponding to the modulation coding scheme;

the measuring unit is further configured to compare the strength of the pilot signal of each base station received by the terminal device according to the data transmission error rate when the number of levels corresponding to the maximum modulation coding scheme that can be supported by each base station by the terminal device is the same.

13. The pilot signal strength measuring device as claimed in claim 11 or 12, wherein the pilot signal strength measuring device is integrated in a network control device.

14. A communication system, comprising:

the base stations are used for respectively determining the grade numbers corresponding to the maximum modulation coding modes which can be supported by the terminal equipment under the base stations according to the channel quality parameters measured by the terminal equipment;

the pilot signal intensity measuring device is used for comparing the intensity of the pilot signal of each base station received by the terminal equipment according to the grade corresponding to the maximum modulation coding mode determined by the base station;

and the control device is used for selecting the base station to be accessed for the terminal equipment according to the comparison result of the pilot signal intensity of each base station and the load information carried by each base station.

15. The communication system of claim 14,

the base station is further configured to obtain a data transmission error rate corresponding to a level corresponding to the modulation coding scheme;

the pilot signal strength measuring device is further configured to compare the strength of the pilot signal of each base station received by the terminal device according to the data transmission error rate when the number of levels corresponding to the maximum modulation coding mode that can be supported by each base station by the terminal device is the same.

16. The communication system according to claim 14 or 15, wherein said pilot signal strength measuring means and said control means are centrally located in a network control device.

17. A communication system, comprising:

the pilot signal intensity measuring device is used for determining the grade corresponding to the maximum modulation coding mode which can be supported by the terminal equipment under the corresponding base station according to the channel quality parameters measured by the terminal equipment; comparing the strength of the pilot signal of each base station received by the terminal equipment according to the level number corresponding to the maximum modulation coding mode which can be supported by the terminal equipment at each base station;

and the control device is used for selecting the base station to be accessed for the terminal equipment according to the comparison result of the pilot signal intensity of each base station received by the pilot signal intensity measuring device on the terminal equipment and the load information borne by each base station.

18. The communication system of claim 17, wherein the pilot signal strength measuring device is further configured to obtain a data transmission error rate corresponding to the level corresponding to the modulation coding scheme; and when the terminal equipment has the same level number corresponding to the maximum modulation coding mode which can be supported by each base station, comparing the strength of the pilot signal of each base station received by the terminal equipment according to the data transmission error rate.

19. The communication system according to claim 17 or 18,

the pilot signal intensity measuring device is arranged in the terminal equipment; the control device is arranged in the network control equipment;

or,

the pilot signal intensity measuring device and the control device are arranged in a network control device in a centralized manner.

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