CN102104877B - Carrier allocating method and system in TD-SCDMA (time division-synchronous code division multiple access) system - Google Patents

Abstract

The invention discloses a carrier allocating method and system in a time division-synchronous code division multiple access (TD-SCDMA) system, aiming at alleviating the situation that frequency resources in the TD-SCDMA system is insufficient and improving the utilization ratio of frequency spectrum of the TD-SCDMA system. The carrier allocating method in the TD-SCDMA system comprises the following steps of: partitioning carriers on an available frequency band of the TD-SCDMA system based on a carrier spacing at 1.4MHz, and determining frequency point information of each partitioned carrier; and allocating the carrier to each base station in the TD-SCDMA system according to the determined frequency point information of each carrier.

Description

Carrier configuration method and system in TD-SCDMA system

technical field

The invention relates to the field of mobile communication, in particular to a carrier configuration method and system in a TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system.

Background technique

Spectrum utilization refers to the transmission capacity per unit bandwidth. The spectrum utilization of a mobile communication system is generally considered from the following two aspects: the carrier spacing of the mobile communication system and the transmission capacity of a single carrier.

TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, as one of the 3G (The 3rd Generation Mobile Communication) standards, adopts CDMA (Code Division Multiple Access, code division multiple access) technology. The existing standard stipulates that TD-SCDMA system can use a total of 35MHz of frequency resources, including B-band (2010MHz-2025MHz) and A-band (1880MHz-1900MHz), of which B-band is a large-scale commercial frequency band; A-band has not yet been applied on a large scale. In the prior art, related parameters such as the carrier spacing of the mobile communication system and the transmission capacity of a single carrier are regulated and constrained by standards. For the TD-SCDMA system, the carrier spacing of the TD-SCDMA system is specified in the existing standard It is 1.6MHz. At the same time, the recommended configuration is given for the transmission capacity of a single carrier under various business and channel conditions.

In the TD-SCDMA system, the carrier spacing is set to 1.6MHz. For the B-band of 2010MHz to 2025MHz, the frequency resources of 15MHz can be divided into 9 carriers. The frequency point configuration of the B-band in the TD-SCDMA system is shown in Table 1. The carrier The schematic diagram is shown in Figure 1. Among them, UARFCN (UMTS Absolute Radio Frequency Channel Number, frequency point number) has a one-to-one correspondence with the frequency point frequency.

Table 1

Frequency point frequency (MHz) Frequency number Frequency Point Number (UARFCN) scenes to be used Remark 2010.0～2010.2 protective belt The starting frequency is 2010.0MHz 2011.0 F1 10055 Indoor distribution system 2012.6 F2 10063 Indoor distribution system 2014.2 F3 10071 Indoor distribution system 2015.0～2015.2 protective belt 2016.0 F4 10080 Outdoor macro base station 2017.6 F5 10088 Outdoor macro base station 2019.2 F6 10096 Outdoor macro base station 2020.8 F7 10104 Outdoor macro base station 2022.4 F8 10112 Outdoor macro base station 2024.0 F9 10120 Outdoor macro base station 2024.8～2025.0 protective belt The end frequency is 2025.0MHz

In the prior art, the available frequency resources of the TD-SCDMA system are very limited, which greatly limits the system capacity. In order to alleviate the shortage of frequency resources in the TD-SCDMA system, it is urgent to improve the spectrum utilization rate of the TD-SCDMA system.

Contents of the invention

The invention provides a carrier configuration method and system in a TD-SCDMA system, which are used to alleviate the shortage of frequency resources in the TD-SCDMA system and improve the frequency spectrum utilization rate of the TD-SCDMA system.

The invention provides a carrier configuration method in a time division synchronous code division multiple access TD-SCDMA system, comprising:

Based on the carrier spacing of 1.4MHz, the available frequency band of the TD-SCDMA system is divided into carriers, and the frequency point information of each divided carrier is determined;

Carrier configuration is performed for each base station in the TD-SCDMA system according to the determined frequency point information of each carrier.

The present invention also provides a carrier configuration system in a Time Division Synchronous Code Division Multiple Access TD-SCDMA system, comprising:

The carrier division device is used to divide the available frequency band of the TD-SCDMA system into carriers based on the carrier spacing of 1.4MHz, and determine the frequency point information of each divided carrier;

The carrier configuration subsystem is used to configure the carrier of each base station in the TD-SCDMA system according to the determined frequency point information of each carrier.

The carrier configuration method and system in the TD-SCDMA system provided by the present invention compresses the carrier spacing of the TD-SCDMA system from 1.6MHz to 1.4MHz, and divides the available frequency bands of the TD-SCDMA system based on the carrier spacing of 1.4MHz. It is possible to increase the number of carriers in the TD-SCDMA system within very limited frequency resources, and then configure carriers for each base station in the TD-SCDMA system according to the determined carriers, thereby improving the spectrum utilization rate of the TD-SCDMA system.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

Fig. 1 is the carrier schematic diagram of B frequency band in the existing TD-SCDMA system;

FIG. 2a is a schematic diagram of an uplink simulation result of ACIR provided by an embodiment of the present invention;

FIG. 2b is a schematic diagram of a downlink simulation result of ACIR provided by an embodiment of the present invention;

FIG. 3a is a schematic diagram of the first type of carrier in the B frequency band after the carrier spacing is compressed according to an embodiment of the present invention;

FIG. 3b is a schematic diagram of a second type of carrier in the B frequency band after the carrier spacing is compressed according to an embodiment of the present invention;

FIG. 3c is a schematic diagram of a third type of carrier in the B frequency band after the carrier spacing is compressed according to an embodiment of the present invention;

FIG. 4 is a flowchart of a carrier configuration method in a TD-SCDMA system provided by an embodiment of the present invention;

FIG. 5 is a specific flow chart of carrier configuration according to the determined frequency point information provided by the embodiment of the present invention;

FIG. 6 is a schematic diagram of the carrier configuration of each base station in the existing TD-SCDMA system;

FIG. 7 is a schematic diagram of the first carrier configuration of each base station in the TD-SCDMA system provided by the embodiment of the present invention;

FIG. 8 is a schematic diagram of the second carrier configuration of each base station in the TD-SCDMA system provided by the embodiment of the present invention;

FIG. 9 is a block diagram of a carrier configuration system in a TD-SCDMA system provided by an embodiment of the present invention.

Detailed ways

In order to alleviate the shortage of frequency resources in the TD-SCDMA system, the embodiment of the present invention aims to provide a carrier configuration method and system in the TD-SCDMA system, so as to improve the spectrum utilization rate of the TD-SCDMA system. The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

The inventors found that the TD-SCDMA system performs carrier division according to the 1.6MHz carrier spacing specified in the existing standard, which can ensure the coexistence of adjacent channels among different operators. For the same operator, there is no related problem caused by adjacent channel interference caused by base station offset between different operators, so for the same operator, the adjacent channel interference index can be appropriately reduced; Carrier division with the 1.6MHz carrier spacing stipulated in the standard will make the spectrum utilization rate lower and cause a certain degree of "waste" of precious frequency resources. Combined with the actual operation of the existing TD-SCDMA system, the embodiment of the present invention proposes that by appropriately reducing the adjacent channel interference index, the carrier spacing of the TD-SCDMA system is correspondingly compressed to increase the number of carriers, so as to alleviate the frequency in the TD-SCDMA system. In the case of insufficient resources, the spectrum utilization rate of the TD-SCDMA system is improved. First, clarify two basic concepts: carrier spacing and carrier occupied bandwidth. The carrier occupied bandwidth refers to the effective bandwidth occupied by the signal in the frequency domain. The carrier occupied bandwidth defined in 3GPP is the frequency bandwidth corresponding to 99% of the energy of the signal. That is to say, the bandwidth occupied by the carrier is the frequency bandwidth corresponding to 99% of the integrated power centered on the center frequency point of the carrier. Based on the chip rate of 1.28Mcps in the TD-SCDMA system, the bandwidth occupied by the carrier is about 1.6MHz. The carrier spacing refers to the frequency spacing between the center frequency points of two adjacent carriers. In a frequency band where multiple carriers can be configured, the carrier spacing needs to be considered when configuring the center frequency point of each carrier. Carrier spacing and carrier occupied bandwidth are matched, usually the two are equal, but in some specific application scenarios, there may be a certain difference between the two. From the definition of carrier occupied bandwidth, it can be seen that part of the energy of the signal will leak out of the carrier occupied bandwidth. In the case of allowing large adjacent channel interference, the carrier spacing can be smaller than the carrier occupied bandwidth; and in the case of very sensitive to adjacent channel interference , the carrier spacing can be larger than the carrier occupied bandwidth. The configuration of carrier spacing can be adjusted according to the needs of actual application scenarios. The standard provides a nominal value of carrier spacing, but the optimization and adjustment in special application scenarios is left to the frequency planning during networking. In order to facilitate flexible adjustment, the carrier grid in the standard (200kHz in the TD-SCDMA system) is generally significantly smaller than the bandwidth occupied by the carrier.

Proposed in the embodiment of the present invention in the TD-SCDMA system, the compression of the carrier spacing should follow the following principles:

(1) Since the chip rate of the TD-SCDMA system is 1.28Mcps, the carrier spacing must be greater than 1.28MHz;

(2) Considering the compatibility with the 3G standard, since the mobile terminal searches for the frequency point of the wireless signal sent by the base station according to the frequency interval of 200kHz, the carrier interval in the 3G system can only be selected as an integral multiple of 200kHz.

Based on the above compression principle of carrier spacing, in the embodiment of the present invention, the carrier spacing of the TD-SCDMA system is compressed from 1.6 MHz to 1.4 MHz. After compressing the carrier spacing of the TD-SCDMA system to 1.4MHz, for the available frequency resources (35MHz total bandwidth) in the TD-SCDMA system, 3 carriers can be added compared to the carrier spacing of 1.6MHz, making spectrum utilization It can be increased by about 14%, as shown in Table 2:

Table 2

frequency band Bandwidth (MHz) Number of Carriers (1.6MHz) Number of Carriers (1.4MHz) Increased number of carriers Spectrum utilization gain B 15 9 10 1 11.1% A 20 12 14 2 16.7% Total 35 twenty one twenty four 3 14.3%

After the carrier spacing is compressed from 1.6MHz to 1.4MHz, although the adjacent channel interference index has decreased, it will not affect the network performance. Although the transmission capacity of a single carrier will be reduced, the increase in the number of carriers will increase the system capacity. Increase. For the 10MHz frequency resource occupied by the outdoor macro base station, the number of carriers increases by about 17%.

Next, analyze the feasibility of compressing the carrier spacing of TD-SCDMA system from 1.6MHz to 1.4MHz based on the adjacent channel interference index.

Under the two application scenarios of the same operator and different operators, the system simulation of ACIR (adjacent channel interference power ratio) was carried out for different outdoor macro base station distributions. The uplink simulation results and downlink simulation results are as follows: As shown in Figs. 2a and 2b, the distance between base stations D=0 corresponds to the application scenario of the same operator, and the distance between base stations D=0.866R and 1.732R corresponds to the application scenarios of different operators.

Through the uplink simulation results and downlink simulation results, the following conclusions can be drawn: in the same operator application scenario, when the ACIR is better than 25dB, there is no loss in system capacity. It can be concluded that in the TD-SCDMA system of the same operator, if the ACIR is guaranteed to be better than 25dB, the system capacity will not be lost. Under 10MHz frequency resources, the system capacity gain can reach 17%; if the ACIR satisfies 22dB, the system capacity loss will be about Under 5%, 10MHz frequency resources, a system capacity gain of about 12% (17%-5%=12%) can still be guaranteed.

The existing standards stipulate the basic radio frequency and adjacent channel interference indicators of the TD-SCDMA system, and the specific values are shown in Table 3:

table 3

project value Code rate (Chip rate) 1.28Mcps

project value Carrier spacing 1.6MHz Chip modulation Raised Cosine＝0.22 Base station adjacent channel leakage ratio (BS ACLR) 40dB Base station adjacent channel selectivity (BSACS) 45dB User Equipment Adjacent Channel Leakage Ratio (UE ACLR) 33dB User Equipment Adjacent Channel Selectivity (UE ACS) 33dB

According to the values of adjacent channel interference indicators such as ACLR (Adjacent Channel Leakage Ratio, Adjacent Channel Leakage Ratio) and ACS (Adjacent Channel Selectivity) of the TD-SCDMA system specified in the existing standards, the ACIR can be calculated according to the formula [1]. Right now:

$\mathrm{<span\; class="notranslate">\; ACIR</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; ACLR</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; ACS</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; ]</span>$

Among them, ACLR (Adjacent Channel Leakage Ratio) indicates the ratio of the transmitted power to the power falling into the adjacent channel.

Putting the values of each adjacent channel interference index in Table 3 into formula [1], the ACIR values of uplink and downlink can be obtained, as shown in Table 4.

Table 4

ACLR(dB) ACS(dB) ACIR(dB) downlink 40 33 32.2 uplink 33 45 32.7

According to the adjacent channel interference index specified in the existing standard, the ACIR (adjacent channel interference power ratio) actually required by the carrier spacing of 1.6MHz is about 32dB, which exceeds the requirement for ACIR in the application scenario of the same operator, indicating that the adjacent channel interference index There is room for further reduction, and the carrier spacing of TD-SCDMA system is feasible to be further compressed.

In the application scenario of the same operator, after the carrier spacing is compressed, although the adjacent channel interference will increase, the co-channel interference will decrease, and the interference caused by the adjacent channel interference will not have a significant impact on the R4 and R5 services, that is, the adjacent channel Interference is far less than the impact of co-channel interference. The specific interference formula is shown in formula [2]:

The AMR12.2kHz voice service was selected for configuration and system simulation based on the 10MHz bandwidth, and the adjacent channel interference and co-channel interference were combined to obtain the following results, as shown in Table 5:

table 5

Cell radius (m) 900 Six carrier average number of users (DL) ACIR = 30dB call drop rate (DL) 4.55% Seven-carrier average number of users (DL) ACIR = 20dB call drop rate (DL) 2.96% Dropped call rate reduction ratio 1.59%

It can be seen that under the condition of 10MHz bandwidth, in the scenario where the total number of users is the same and the same-channel interference is limited, by increasing the number of 6 carriers to 7 carriers and dispersing the number of users connected to each carrier, the interference can be effectively reduced and the network can be improved. The purpose of KPI (Key Performance Indication, key performance indicators).

Based on the above feasibility analysis, the embodiment of the present invention provides a feasible scheme for carrier division of the frequency resources in the TD-SCDMA system. In the specific implementation, the B frequency band (2010MHz～2025MHz) is divided into carriers based on the carrier spacing of 1.4MHz. The number of carriers in the B-band has been increased from the existing 9 to 10. Several preferred frequency point configurations are shown in Table 6, and carrier schematic diagrams are shown in Figures 3a, 3b, and 3c, and other possible frequency point configurations will not be repeated here. In the embodiment of the present invention, the frequency resource divided into carriers based on the carrier spacing of 1.4 MHz can be called an available frequency band, and the available frequency band can be flexibly selected, and the B frequency band (2010-2025 MHz) can be selected according to the usage of the existing frequency resources. ) is the available frequency band, of course, you can also select A frequency band and B frequency band as the available frequency band, or select A frequency band as the available frequency band, which can ensure that the number of carriers obtained by dividing the available frequency band based on the carrier spacing of 1.4MHz is greater than that based on 1.6MHz. The carrier interval is the number of carriers obtained by dividing the available frequency band into carriers, so as to improve the spectrum utilization rate of the TD-SCDMA system.

Table 6

The embodiment of the present invention provides a carrier configuration method in a TD-SCDMA system, as shown in Figure 4, including:

S401. Perform carrier division on the available frequency band of the TD-SCDMA system based on the carrier spacing of 1.4MHz, and determine the frequency point information of each carrier obtained by division;

S402. Perform carrier configuration for each base station in the TD-SCDMA system according to the determined frequency point information of each carrier.

In the specific implementation of S401, the B frequency band (2010MHz～2025MHz) in the TD-SCDMA system can be used as the available frequency band, and the B frequency band of the TD-SCDMA system is divided into carriers based on the carrier spacing of 1.4MHz, and each determined carrier Please refer to Table 6 for the frequency point information. Since the frequency point number and the frequency point frequency have a one-to-one correspondence, the frequency point information can refer to either or both of the frequency point number and the frequency point frequency. Usually, it refers to frequency. An added carrier can be allocated to the indoor distribution system, and can also be allocated to the outdoor macro base station. Taking the 1.4MHz scheme 1 in Table 6 as an example, the carriers corresponding to 2011MHz, 2012.6MHz, 2014.2MHz, and 2015.8MHz can be allocated to the indoor distribution system, and 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, The carrier corresponding to MHz is assigned to the outdoor macro base station; the carrier corresponding to 2011MHz, 2012.6MHz, and 2014.2MHz can also be assigned to the indoor distribution system, 2015.8MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz The corresponding carrier is allocated to the outdoor macro base station. Taking the 1.4MHz scheme 2 in Table 6 as an example, the carriers corresponding to 2010.8MHz, 2012.4MHz, 2014MHz, and 2015.6MHz can be allocated to the indoor distribution system, and 2017MHz, 2018.4MHz, 2019.8MHz, 2021.2MHz, 2022.6MHz, and 2024.2 The carrier corresponding to MHz is allocated to the outdoor macro base station; the carrier corresponding to 2010.8MHz, 2012.4MHz, 2014MHz can also be allocated to the indoor distribution system, 2015.6MHz, 2017MHz, 2018.4MHz, 2019.8MHz, 2021.2MHz, 2022.6MHz, 2024.2MHz The corresponding carrier is allocated to the outdoor macro base station. Taking the 1.4MHz scheme 3 in Table 6 as an example, the carriers corresponding to 2010.8MHz, 2012.4MHz, 2014MHz, and 2015.6MHz can be allocated to the indoor distribution system, and 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, and 2024.2 The carrier corresponding to MHz is allocated to the outdoor macro base station; the carrier corresponding to 2010.8MHz, 2012.4MHz, and 2014MHz can also be allocated to the indoor distribution system, 2015.6MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz The corresponding carrier is allocated to the outdoor macro base station.

In the specific implementation of S402, as shown in Figure 5, the following steps are included:

S501. The network planning device plans configurable frequency point information for each base station according to the determined frequency point information of each carrier, and sends it to OMC (Operations & Maintenance Center, operation and maintenance center);

S502, the OMC will send the configurable frequency point information planned for each base station to the RNC (Radio Network Controller, radio network controller) in charge of the base station;

S503. The RNC distributes the frequency point information of each base station under its jurisdiction to corresponding base stations, and controls each base station under its jurisdiction to transmit and receive wireless signals at corresponding frequency points;

Since the mobile terminal searches for the frequency point of the wireless signal sent by the base station according to the frequency interval of 200kHz, when the base station adopts the new carrier configuration scheme, since the frequency point for transmitting and receiving the wireless signal is still an integer multiple of 200kHz, there is no need to search for the existing wireless signal based on After any modification of the 3G standard mobile terminal, the mobile terminal can automatically search for the newly configured frequency point and enter the normal working state.

In the specific implementation, based on the increased number of carriers, in order to further improve the system capacity, the number of configurable frequency point information planned by the network planning equipment for each base station is higher than the configurable frequency point information planned for each base station based on the carrier spacing of 1.6MHz. The number of point information. For example, as shown in FIG. 6, assume that the number of configurable frequency point information planned by the network planning device for each base station is 3, that is, the number of carriers is 3, and the frequency point numbers are (1, 2, 3) respectively, and each The base station is configured with the same frequency. Based on the increased number of carriers, as shown in Figure 7, the number of configurable frequency point information planned by the network planning equipment for each base station is increased to 4, that is, the number of carriers is 4, and the frequency point numbers are (1, 2, 3, 4 ), the capacity of each base station can be increased by increasing the number of frequency point information configured for each base station, that is, the number of carriers, thereby increasing the system capacity.

In a specific implementation, based on the increased number of carriers, in order to further reduce co-channel interference, part or all of the configurable frequency point information planned by the network planning device for adjacent base stations is different from each other. For example, as shown in FIG. 6, assume that the number of configurable frequency point information planned by the network planning device for each base station is 3, that is, the number of carriers is 3, and the frequency point numbers are (1, 2, 3) respectively, and each The base station is configured with the same frequency. Based on the increased number of carriers, as shown in Figure 8, the configurable frequency point information planned by the network planning device for adjacent base stations may be partially different from each other, and the frequency point numbers of adjacent base stations are (1, 2, 3), (1, 3, 4), (2, 3, 4), because the frequency point information configured between adjacent base stations is different from each other, the same-frequency interference in the TD-SCDMA system is reduced and the service performance is improved.

Based on the same technical idea, an embodiment of the present invention provides a carrier configuration system in a Time Division Synchronous Code Division Multiple Access TD-SCDMA system, as shown in FIG. 9 , including:

The carrier division device 91 is used to divide the available frequency bands of the TD-SCDMA system into carriers based on the carrier spacing of 1.4MHz, and determine the frequency point information of each carrier obtained by division;

The carrier configuration subsystem 92 is configured to perform carrier configuration for each base station in the TD-SCDMA system according to the determined frequency point information of each carrier.

The carrier configuration subsystem 92 may specifically include a network planning device 921, an operation and maintenance center OMC922, and a radio network controller RNC 923, wherein:

The network planning device 921 is used to plan configurable frequency point information for each base station according to the determined frequency point information of each carrier, and send it to the OMC 922;

OMC 922, used to deliver the configurable frequency point information planned for each base station to the RNC in charge of the base station;

RNC 923 is used to distribute the frequency point information of each base station under its jurisdiction to corresponding base stations, and control each base station under its jurisdiction to transmit and receive wireless signals on corresponding frequency points.

Preferably, the quantity of configurable frequency point information planned by the network planning device 921 for each base station is higher than the quantity of configurable frequency point information planned for each base station based on the carrier spacing of 1.6 MHz, or, the network planning device 921 Part or all of the configurable frequency point information planned for adjacent base stations is different from each other.

The carrier configuration method and system in the TD-SCDMA system provided by the embodiment of the present invention compresses the carrier spacing of the TD-SCDMA system from 1.6MHz to 1.4MHz, and carries out carrier waves on the available frequency band of the TD-SCDMA system based on the carrier spacing of 1.4MHz Division can increase the number of carriers in the TD-SCDMA system within very limited frequency resources, and then perform carrier configuration for each base station in the TD-SCDMA system according to the determined carriers, thereby improving the spectrum utilization of the TD-SCDMA system .

The present invention has not only passed preliminary studies such as theoretical analysis, system simulation, and laboratory testing, but also verified the feasibility of carrier spacing compression in the TD-SCDMA system in the field test process. In order to facilitate the description of the technical effects of the present invention, some The actual field test results, the KPI test results of the indoor scene are shown in Table 7, and the KPI test results of the outdoor scene are shown in Table 8. Only the KPI test results are given here, and other test indicators will not be repeated.

Table 7

Table 8

By comparing the KPI test results of indoor and outdoor scenarios, it can be seen that after the carrier spacing is compressed to 1.4MHz, the network performance is no worse than the corresponding related performance indicators under the 1.6MHz carrier spacing. Through the actual tests of various typical test cases such as different test scenarios, different test methods, different test services, and different test angles, the test results prove that after the carrier spacing of the TD-SCDMA system is compressed to 1.4MHz, there will be no interference due to adjacent channels. The increase of the number of carriers will affect the performance index of the existing network. It is completely feasible to compress the carrier spacing of the TD-SCDMA system to 1.4MHz in practical applications. Therefore, the method of increasing the number of carriers by compressing the carrier spacing can improve the frequency spectrum of the TD-SCDMA system Utilization, the effect is very obvious.

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.

Claims (8)

1. a kind of carrier configuration method in time division synchronous code division multiple access TD-SCDMA system, it is characterized in that, comprising: For the application scenario of the same operator, after determining the feasibility of compressing the carrier spacing of the TD-SCDMA system from 1.6MHz to 1.4MHz based on the analysis of the adjacent channel interference index, the available frequency band of the TD-SCDMA system is carried out based on the carrier spacing of 1.4MHz dividing, determining the frequency point information of each carrier obtained by dividing; According to the determined frequency point information of each carrier, carry out carrier configuration for each base station in the TD-SCDMA system; Wherein, the available frequency band is B-band 2010MHz-2025MHz, and the correspondingly determined number of carriers in the B-band is increased from the existing 9 to 10, and one additional carrier can be allocated to the indoor distribution system for use or allocation For outdoor macro base stations; Specifically, the determined frequency point information of each carrier includes: 2011MHz, 2012.6MHz, 2014.2MHz, 2015.8MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz; or, 2010.8MHz, 2012.4MHz, 2014MHz, 2015.6MHz, 2017MHz, 2018.4MHz, 2019.8MHz, 2021.2MHz, 2022.6MHz, 2024.2MHz; or, 2010.8MHz, 2012.4MHz, 2014MHz, 2015.6MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz. 2. The method according to claim 1, characterized in that, according to the frequency point information of each carrier determined, carrier configuration is carried out to each base station in the TD-SCDMA system, specifically comprising: According to the determined frequency point information of each carrier, the network planning equipment plans configurable frequency point information for each base station, and sends it to the operation and maintenance center OMC; The operation and maintenance center OMC will deliver the configurable frequency point information planned for each base station to the radio network controller RNC in charge of the base station; The RNC distributes frequency point information of each base station under its jurisdiction to corresponding base stations, and controls each base station under its jurisdiction to transmit and receive wireless signals on corresponding frequency points. 3. The method according to claim 2, characterized in that the number of configurable frequency point information planned by the network planning device for each base station is higher than the configurable frequency point information planned for each base station based on the carrier spacing of 1.6MHz The number of frequency point information. 4. The method according to claim 2, wherein the configurable frequency point information planned by the network planning device for adjacent base stations is partially or entirely different from each other. 5. a kind of carrier configuration system in time division synchronous code division multiple access TD-SCDMA system, it is characterized in that, comprising: Carrier division equipment is used for the application scenario of the same operator. After analyzing and determining the feasibility of compressing the carrier spacing of the TD-SCDMA system from 1.6MHz to 1.4MHz based on the analysis of the adjacent channel interference index, the TD-SCDMA based on the carrier spacing of 1.4MHz The available frequency band of the system is divided into carriers, and the frequency point information of each carrier obtained by the division is determined; The carrier configuration subsystem is used to configure the carrier of each base station in the TD-SCDMA system according to the determined frequency point information of each carrier; Wherein, the available frequency band is B-band 2010MHz-2025MHz, and the correspondingly determined number of carriers in the B-band is increased from the existing 9 to 10, and one additional carrier can be allocated to the indoor distribution system for use or allocation For outdoor macro base stations; Specifically, the determined frequency point information of each carrier includes: 2011MHz, 2012.6MHz, 2014.2MHz, 2015.8MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz; or, 2010.8MHz, 2012.4MHz, 2014MHz, 2015.6MHz, 2017MHz, 2018.4MHz, 2019.8MHz, 2021.2MHz, 2022.6MHz, 2024.2MHz; or, 2010.8MHz, 2012.4MHz, 2014MHz, 2015.6MHz, 2017.2MHz, 2018.6MHz, 2020MHz, 2021.4MHz, 2022.8MHz, 2024.2MHz. 6. The system according to claim 5, wherein the carrier configuration subsystem specifically includes a network planning device, an operation and maintenance center (OMC) and a radio network controller (RNC), wherein: The network planning device is configured to plan configurable frequency point information for each base station according to the determined frequency point information of each carrier, and send it to the OMC; The operation and maintenance center OMC is used to deliver the configurable frequency point information planned for each base station to the RNC in charge of the base station; The radio network controller RNC is used for distributing frequency point information of each base station under its jurisdiction to corresponding base stations, and controlling each base station under its jurisdiction to transmit and receive wireless signals at corresponding frequency points. 7. The system of claim 6, wherein: The quantity of configurable frequency point information planned by the network planning device for each base station is higher than the quantity of configurable frequency point information planned for each base station based on the carrier spacing of 1.6 MHz. 8 . The system according to claim 6 , wherein part or all of the configurable frequency information planned by the network planning device for adjacent base stations is different from each other.