CN103517425A - Method for raising resource utilization rate of TD-LTE system and base station - Google Patents

Abstract

The present application discloses a method for improving resource utilization of TD-LTE system, including: adding a ninth special subframe configuration in advance; when the current special subframe configuration is 3:9:2 or 3:10:1, TD -The LTE base station first notifies the TD-LTE terminal of its ability to simultaneously support the current special subframe configuration and the ninth special subframe configuration through a system broadcast message, and obtains the TD-LTE terminal's ninth special subframe configuration from the TD-LTE terminal Configured support capability; after the TD-LTE terminal accesses, only the data service and/or paging message of the TD-LTE terminal that supports the ninth special subframe configuration is scheduled in the downlink pilot time slot (DwPTS) resource, In addition, TD-LTE terminals that only support the ninth special subframe configuration are scheduled to transmit the Sounding Signal. Applying the technical solution disclosed in this application can support the current special subframe configuration and the newly added special subframe configuration at the same time under the premise of backward compatibility with the existing TD-LTE terminals on the existing network, thereby improving the resource utilization of the TD-LTE system Rate.

Description

A method and base station for improving TD-LTE system resource utilization

technical field

The present application relates to the technical field of wireless communication, in particular to a method and a base station for improving resource utilization of a TD-LTE system.

Background technique

In the 3GPP Long Term Evolution (LTE, Long Term Evolution) system, two frame structure types are supported: Frequency Division Duplex (FDD) and Time Division Duplex (TDD), which are called FDD LTE and TD-LTE respectively. The physical layer frame structure of TD-LTE is shown in Figure 1: a 10ms radio frame consists of two half-frames with a length of T _f =153600×T _s =5ms; each 5ms half-frame contains 5 subframes with a length of 30720×T _s =1 ms.

The uplink and downlink of the TD-LTE system are separated in time, and the carrier frequency is the same, that is, in every 10ms period, a total of 10 subframes are available for the uplink and downlink, and each subframe is either used for uplink or downlink. Considering the coexistence compatibility with the TD-SCDMA system, TD-LTE has defined a variety of uplink and downlink subframe ratio configurations and special subframe configurations.

At present, the TD-LTE system supports a total of 7 uplink and downlink subframe ratio configurations, which can be divided into two types: 10ms period and 5ms period, so as to flexibly support uplink and downlink services with different ratios, as shown in Table 1.

Table 1: Uplink and downlink subframe configuration of LTE TDD

In Table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.

In a 5ms period, subframe 1 and subframe 6 are fixedly configured as special subframes; in a 10ms period, subframe 1 is fixedly configured as a special subframe.

The special subframe consists of 3 special fields, which are downlink pilot time slot (DwPTS, Downlink pilottime slot), guard interval (GP, Guard period) and uplink pilot time slot (UpPTS, Uplink pilottime slot).

TD-LTE defines 9 special subframe configurations, as shown in Table 2 and Table 3 for details.

Table 2: Special subframe configuration table (unit: Ts)

Table 3: Special subframe configuration table (unit: OFDM symbol)

Table 2 defines the length of time occupied by DwPTS, GP and UpPTS under each special subframe configuration; Table 3 defines the number of OFDM symbols occupied by DwPTS, GP and UpPTS respectively under each special subframe configuration. Wherein, the downlink regular CP and the downlink extended CP are respectively defined. For the sake of intuition, a specific special subframe configuration is usually described by the ratio of resources occupied by DwPTS, GP and UpPTS respectively. For example, take the special subframe configuration 0 under the downlink conventional CP in Table 3 as an example:

The number of OFDM symbols of DwPTS is 3, the number of OFDM symbols of GP is 10, and the number of OFDM symbols of UpPTS is 1. It can be said that the special subframe configuration at this time is 3:10:1.

For the downlink conventional CP, when the length of the DwPTS is less than 19760Ts, it is only used to transmit the physical downlink control channel (PDCCH) and the primary synchronization channel (P-SCH), but cannot transmit the physical downlink shared channel (PDSCH);

For the downlink extended conventional CP, when the length of the DwPTS is less than 20480Ts, it is only used to transmit the physical downlink control channel (PDCCH) and the primary synchronization channel (P-SCH), but cannot transmit the physical downlink shared channel (PDSCH);

UpPTS is only used to transmit sounding (Sounding) signals and random access signals of transmission format 4;

GP is located at the moment when downlink is converted to uplink, and its main function is to avoid the interference of downlink signals to uplink signals. The larger the GP, the larger the radius of the cell that can be supported, which means that the number of unusable OFDM symbols increases, and the transmission efficiency is lost.

At present, the service time slot ratio widely used in TD-SCDMA system is 2:4, as shown in Fig. 2 .

The number of chips and the time length of each time slot are shown in Table 4.

Table 4: TD-SCDMA time slot structure table (ratio 2:4)

In order to ensure coexistence with the TD-SCDMA system with a service time slot ratio of 2:4, the TD-LTE system can only use 2 uplink and downlink subframe configurations, that is, the uplink and downlink subframe ratio is 1:3, and the special subframe configuration can It is configuration 0 (3:10:1) or configuration 5 (3:9:2). In this case, the frame structure comparison diagram of the two systems is shown in Figure 3.

When the special subframe of TD-LTE is configured as 0 or 5, DwPTS occupies 3 OFDM symbols. At this time, DwPTS can only be used to transmit PDCCH and P-SCH, and cannot be used to transmit PDSCH, resulting in a waste of downlink resources.

In view of the above problems, an existing technical solution proposes: add a new special subframe configuration 6:6:2 in TD-LTE, at this time, DwPTS occupies 6 OFDM symbols, of which 1~2 OFDM symbols are used for To transmit PDCCH, 4-5 OFDM symbols are used to transmit PDSCH. At this time, it can still meet the coexistence with TD-SCDMA uplink and downlink time slot ratio of 2:4, and will not cause mutual interference. At the same time, at least 4/33=12.1% of downlink throughput can be increased.

However, this existing technology can only improve the utilization rate of downlink resources, but cannot improve the utilization rate of uplink resources, especially when there are a large number of terminals in the TD-LTE system using beamforming (Beamforming) technology, the number of uplink Sounding resources is small, It will seriously affect the performance of downlink Beamforming, thereby reducing the utilization rate of downlink resources.

In view of the above problems, another existing technical solution is proposed: add another new special subframe configuration in TD-LTE, such as 6:5:3, 6:4:4, 6:3:5, etc., through Increase the number of OFDM symbols occupied by the UpPTS to transmit uplink Sounding resources, and stipulate that the newly added OFDM symbols in the UpPTS can only be used to transmit Sounding. This technical solution can meet the coexistence with the TD-SCDMA uplink and downlink time slot ratio of 2:4, and at the same time, it can also increase the Sounding resource by 33% or increase the uplink throughput by about 7.8%.

A schematic diagram of a frame structure when the above two existing technical solutions coexist with the existing TD-SCDMA service with a time slot ratio of 2:4 is shown in FIG. 4 .

The above two existing technical solutions are to improve the resource utilization rate of TD-LTE by adding a new special subframe configuration method under the premise of ensuring that the TD-LTE system can coexist with the TD-SCDMA system. However, after the new special subframe configuration is added to the existing TD-LTE system, how the terminals already in commercial use and the new terminals (such as roaming terminals) that do not support the newly added special subframe configuration can normally perform business, is not given. come up with a corresponding solution.

Contents of the invention

The present application provides a method and a base station for improving the resource utilization rate of the TD-LTE system, so as to improve the resource utilization rate of the TD-LTE system on the premise of being backward compatible with existing TD-LTE terminals in the existing network.

A method for improving resource utilization of a Time Division Duplex Long Term Evolution (TD-LTE) system provided by this application includes:

When the current special subframe configuration is 3:9:2 or 3:10:1, the TD-LTE base station notifies the TD-LTE base station of its ability to support both the current special subframe configuration and the ninth special subframe configuration through a system broadcast message. LTE terminal;

The TD-LTE base station acquires the support capability of the TD-LTE terminal for the configuration of the ninth special subframe from the TD-LTE terminal;

After the TD-LTE terminal accesses, only the data service and/or paging message of the TD-LTE terminal supporting the ninth special subframe configuration is scheduled in the downlink pilot time slot (DwPTS) resource.

Preferably, the configuration of the ninth special subframe is any one of 6:6:2, 6:5:3, 6:4:4, and 6:3:5.

The method may further include: after the TD-LTE terminal accesses, the TD-LTE terminal that only supports the configuration of the ninth special subframe configures an uplink pilot time slot ( In the OFDM symbol resource increased by UpPTS), the Sounding signal is scheduled to be transmitted.

Preferably, the TD-LTE base station can carry the identification of whether to support the ninth special subframe configuration in the system information block 1 (SIB1), so as to realize its ability to support the current special subframe configuration and the ninth special subframe configuration at the same time Notify the TD-LTE terminal;

The TD-LTE base station receives the user equipment capability information (UECapabilityInformation) message from the TD-LTE terminal, and obtains the TD-LTE terminal's support for the ninth special subframe configuration according to the identifier of whether the ninth special subframe configuration is supported in the UECapabilityInformation message ability.

Preferably, the transport block size (TBS) N _PRB of the physical downlink shared channel (PDSCH) in the DwPTS subframe configured in the ninth special subframe can be calculated according to the following formula:

Wherein, N' _PRB is the number of physical resource blocks actually allocated by the DwPTS subframe configured by the TD-LTE base station in the ninth special subframe;

α is a preset parameter, and its setting ensures that the coding efficiency is less than or equal to 93%.

A Time Division Duplex Long Term Evolution (TD-LTE) base station provided by this application is used to improve system resource utilization, including: a capability indication module, a capability collection module and a scheduling module, wherein:

When the current special subframe configuration is 3:9:2 or 3:10:1, the capability indication module is used to simultaneously support the current special subframe configuration and the ninth special subframe by the TD-LTE base station through a system broadcast message The configured capability notifies the TD-LTE terminal;

The capability collection module is used to obtain the support capability of the TD-LTE terminal for the configuration of the ninth special subframe from the TD-LTE terminal;

After the TD-LTE terminal accesses, the scheduling module is used to only schedule the data service and/or paging message of the TD-LTE terminal supporting ninth special subframe configuration in the downlink pilot time slot (DwPTS) resource.

Preferably, the configuration of the ninth special subframe is any one of 6:6:2, 6:5:3, 6:4:4, and 6:3:5.

Preferably, after the TD-LTE terminal accesses, the scheduling module is also used to configure OFDM symbol resources increased in the ninth special subframe compared to the uplink pilot time slot (UpPTS) configured in the current special subframe , only TD-LTE terminals supporting the configuration of the ninth special subframe are scheduled to transmit the Sounding signal.

Preferably, the capability indication module indicates whether the TD-LTE base station supports the current special subframe configuration and the ninth special subframe configuration at the same time by carrying the identifier of whether the ninth special subframe configuration is supported in the system information block 1 (SIB1). The configured capability notifies the TD-LTE terminal;

Preferably, the capability collection module is configured to receive a user equipment capability information (UECapabilityInformation) message from a TD-LTE terminal, and obtain the TD-LTE terminal's support for the ninth special subframe configuration according to the identifier carried in the UECapabilityInformation message. Nine special subframe configuration support capabilities.

Preferably, the scheduling module calculates the transport block size (TBS) N _PRB of the physical downlink shared channel (PDSCH) in the DwPTS subframe of the ninth special subframe configuration according to the following formula:

Wherein, N' _PRB is the number of physical resource blocks actually allocated by the DwPTS subframe configured by the TD-LTE base station in the ninth special subframe;

α is a preset parameter, and its setting ensures that the coding efficiency is less than or equal to 93%.

It can be seen from the above technical solution that the technical solution for improving the resource utilization of the TD-LTE system provided by this application is configured by adding a new special subframe, and when the current special subframe is configured as 3:9:2 or 3:10:1 , the TD-LTE base station notifies the TD-LTE terminal of its ability to support the newly added special subframe configuration, and learns from the TD-LTE terminal the support capability of the TD-LTE terminal to the newly added special subframe configuration, so that The TD-LTE base station can schedule different terminals in different resources according to the TD-LTE terminal's ability to support the newly added special subframe configuration, so that under the premise of backward compatibility with existing TD-LTE terminals on the existing network, Improve system resource utilization.

Description of drawings

FIG. 1 is a schematic diagram of a frame structure of an existing TD-LTE system;

Fig. 2 is the time slot structure schematic diagram of existing TD-SCDMA service time slot ratio being 2:4;

Fig. 3 is the frame structure comparison schematic diagram of the existing TD-SCDMA service time slot ratio is 2:4, TD-LTE system uplink and downlink subframe configuration is 2;

Figure 4 is a schematic diagram of the frame structure when the existing TD-SCDMA service time slot ratio is 2:4 and TD-LTE adopts a new special subframe configuration to coexist;

Fig. 5 is the composition structure schematic diagram of TD-LTE base station of the present invention;

Fig. 6 is a flowchart of signaling interaction between a TD-LTE base station and a terminal in a preferred embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples.

In order to solve the existing problems in the prior art, the application proposes a method for improving the resource utilization rate of the TD-LTE system, which mainly includes the following steps:

Step 1: When the current special subframe configuration is 3:9:2 or 3:10:1, the TD-LTE base station will support the current special subframe configuration and the ninth special subframe configuration ( may be referred to as ssp9 for short) to notify the TD-LTE terminal of the capability.

You can add ssp9 to the protocol in advance. ssp9 can be any of 6:6:2, 6:5:3, 6:4:4, 6:3:5, and ssp9 can only be configured with special subframes 3:9:2 or 3: 10:1 binding exists.

It should be noted that: in the background technology, the service time slot ratio of the TD-SCDMA system is 2:4, and the uplink and downlink subframe ratio of the TD-LTE system is 1:3. The problems existing in 3:9:2 or 3:10:1 are analyzed and explained. The technical solution of this application is applicable to all special subframe configurations of 3:9:2 or 3:10:1, and is not limited to The service time slot ratio of the TD-SCDMA system is 2:4, and the uplink and downlink subframe ratio of the TD-LTE system is 1:3.

For this step, this application provides several preferred implementation modes:

The first preferred implementation mode: Add the identification of whether to support ssp9 at the same time in the system broadcast message (for example: SIB1), and use the different values of the identification to determine whether the TD-LTE base station supports the current special subframe configuration and ssp9 at the same time The capability is notified to the TD-LTE terminal.

The second preferred implementation mode: set the identification that supports ssp9 at the same time, if the identification is carried in the system broadcast message SIB1, it means that the TD-LTE base station supports the current special subframe configuration and ssp9 at the same time; otherwise, it means that the TD-LTE base station ssp9 is not supported.

Step 2: The TD-LTE base station obtains from the TD-LTE terminal the support capability of the TD-LTE terminal for the configuration of the ninth special subframe.

In this step, the TD-LTE base station may receive a user equipment capability information (UECapabilityInformation) message from the TD-LTE terminal, and obtain the support capability of the TD-LTE terminal for ssp9 according to the identifier of whether to support ssp9 carried in the UECapabilityInformation message.

Step 3: After the TD-LTE terminal accesses, the TD-LTE base station only schedules the data service and/or paging message of the TD-LTE terminal supporting ssp9 in the DwPTS resource, which cannot be used for system broadcast information. In the DwPTS, the scheduled TD-LTE terminal supporting ssp9 can measure CQI/PMI and RI.

Further, the TD-LTE base station only schedules the TD-LTE terminal supporting ssp9 to transmit the Sounding signal in the OFDM symbol resources increased by ssp9 compared with the UpPTS configured in the current special subframe. In addition, the TD-LTE base station and the scheduled TD-LTE terminal supporting ssp9 use the same method as the conventional uplink subframe to determine the frequency domain position of the Sounding signal. For details, refer to Section 5.5.3 of 3GPP 36.211, which will not be repeated here .

For terminals existing on the existing network and terminals that do not support ssp9, the TD-LTE base station only schedules in regular downlink subframes.

In this step, the transport block size (TBS) N _PRB of the PDSCH in the DwPTS subframe of ssp9 can be calculated according to the following formula:

Wherein, N' _PRB is the number of physical resource blocks actually allocated by the TD-LTE base station in the DwPTS subframe of ssp9;

α is a preset parameter. When the special subframe configuration is 3:9:2 or 3:10:1, take α=0.75, because the number of OFDM symbols in the DwPTS subframe of ssp9 increases, in order to ensure that the PDSCH coding efficiency is less than or equal to 93%, it needs to be reset α, specifically determine the appropriate α according to the description in Section 5.1.4 of 3GPP36.212.

Corresponding to the above method, the present application provides a TD-LTE base station as shown in FIG. 5 for improving system resource utilization. The TD-LTE base station shown in FIG. 5 includes: a capability indication module 510, a capability collection module 520 and Scheduling module 530, wherein:

When the current special subframe configuration is 3:9:2 or 3:10:1, the capability indication module 510 is used to make the TD-LTE base station simultaneously support the current special subframe configuration and the ninth special subframe configuration through a system broadcast message The ability to notify the TD-LTE terminal;

The capability collection module 520 is used to obtain the support capability of the TD-LTE terminal for the configuration of the ninth special subframe from the TD-LTE terminal;

After the TD-LTE terminal accesses, the scheduling module 530 is configured to only schedule the data service and/or paging message of the TD-LTE terminal supporting the configuration of the ninth special subframe in the DwPTS resource.

Preferably, the ninth special subframe configuration may be any one of 6:6:2, 6:5:3, 6:4:4, and 6:3:5.

After the TD-LTE terminal accesses, the scheduling module 530 can also be used to schedule only the Ninth Special Subframe configuration in the OFDM symbol resources that are increased in the ninth special subframe configuration compared to the UpPTS of the current special subframe configuration. TD-LTE terminals transmit Sounding signals.

Preferably, the capability indication module 510 can notify the TD-LTE base station of its ability to simultaneously support the current special subframe configuration and the ninth special subframe configuration by carrying an identifier in SIB1 whether it supports the ninth special subframe configuration. LTE terminal;

The capability collection module 520 may be configured to receive a user equipment capability information (UECapabilityInformation) message from the TD-LTE terminal, and obtain the configuration of the ninth special subframe by the TD-LTE terminal according to the identifier of whether the configuration of the ninth special subframe is supported in the UECapabilityInformation message. configuration support.

Preferably, the scheduling module 530 can calculate the TBS of the PDSCH in the DwPTS subframe of the ninth special subframe configuration according to the following formula:

Wherein, N' _PRB is the number of physical resource blocks actually allocated by the DwPTS subframe configured by the TD-LTE base station in the ninth special subframe;

α is a preset parameter, and its setting ensures that the coding efficiency is less than or equal to 93%.

The technical solution of the present application will be further described in detail through a preferred embodiment below in conjunction with the accompanying drawings.

This preferred embodiment takes the newly added special subframe configuration 6:5:3 as an example. When the TD-LTE cell is configured with a ratio of uplink and downlink subframes of 1:3 and a special subframe configuration of 3:9:2, The signaling interaction process between the TD-LTE base station and the terminal is shown in Figure 6, which specifically includes the following steps:

Step 1: Define the newly added special subframe configuration 6:5:3 as ssp9, and add the following field in the SIB 1 message to identify whether the TD-LTE cell supports ssp9 at the same time:

ssp9SimultaneousSupport ENUMERATED{true}

After receiving the SIB1 message, the existing terminal in the live network will ignore this newly added field.

The TD-LTE base station preferably configures a newly added OFDM symbol in the UpPTS to be able to send the Sounding signal, and broadcasts it in the SIB2 message.

Step 2: The random access codeword resource of the TD-LTE cell is notified to all terminals in the cell in the SIB2 system broadcast message. The random access codeword resource and the TD-LTE base station only support special subframe configuration 3:9: 2, the resources used are the same, and both existing terminals on the existing network and new terminals supporting this application can use the random access codeword resources to perform random access procedures.

Step 3: After receiving the random access preamble, the TD-LTE base station sends Msg2 on the regular subframe, adjusts the frequency and time offset of the access terminal, and allocates corresponding downlink resources for the access terminal.

Step 4: The terminal sends a radio resource control connection request (rrcConnectionRequest) message in the downlink resource allocated in step 3.

Step 5: The TD-LTE base station allocates Sounding resources for the terminal through the radio resource control connection establishment (rrcConnectionSetup) message. The Sounding resource is consistent with the resources used when only supporting special subframe configuration 3:9:2. The existing terminals on the existing network and All new terminals supporting this application can use this resource to send Sounding signals.

Step 6: The access terminal sends a radio resource control connection establishment complete (rrcConnectionSetupComplete) message to the TD-LTE base station.

Step 7: The access terminal uses the resource allocated in step 5 to send the Sounding signal for uplink frequency selection scheduling and downlink beamforming.

Step 8: The access terminal performs non-access stratum authentication and security negotiation with the TD-LTE base station.

Step 9: The TD-LTE base station sends a UE capability request (UEcapabilityEnquiry) message to the terminal, requesting the terminal to report the capability.

The downlink RRC signaling sent in steps 3 to 9 are all sent on the downlink regular subframe. Here, the downlink regular subframe refers to the downlink subframe except the DwPTS subframe.

Step 10: The terminal supporting ssp9d adds whether to support ssp9 field in the E-UTRA capability in the UE capability information (UEcapabilityInformation) message:

ssp9Support CHOICE{

release NULL,

OPTIONAL

If this field exists, it indicates that the terminal supports ssp9; otherwise, it indicates that the terminal does not support ssp9.

For terminals existing on the existing network, this field will not be carried, and the TD-LTE base station defaults that the terminal does not support ssp9.

Step 11: The TD-LTE base station and the access terminal perform security algorithm negotiation on the access layer.

Step 12: The TD-LTE base station reconfigures the Sounding resource of the access terminal through the RRC Connection Reconfiguration (rrcConnectionReconfigutation) message. When a newly added OFDM symbol in the UpPTS can send the Sounding signal, the OFDM symbol is preferentially configured to support ssp9 terminals; for terminals already in commercial use on the live network and terminals that do not support ssp9, the Sounding resources will not be reconfigured.

For a terminal that supports ssp9, the TD-LTE base station can send the rrcConnectionReconfigutation message on the DwPTS of ssp9; for commercial terminals existing on the existing network and new terminals that do not support ssp9, the TD-LTE base station sends the rrcConnectionReconfigutation message on the regular downlink subframe.

Step 13: The terminal sends an rrcConnectionReconfigutationComplete message to the TD-LTE base station.

Step 14: The terminal supporting ssp9 uses the reconfigured Sounding resource to send the Sounding signal.

Step 15: For a terminal supporting ssp9, the TD-LTE base station will preferentially schedule the terminal on the DwPTS, including data transmission and paging in RRC connected state.

The TD-LTE base station schedules existing terminals on the live network and terminals that do not support ssp9 on regular subframes.

It can be seen from the above embodiments that the technical solution for improving the resource utilization of the TD-LTE system provided by the present application is configured by adding a new special subframe, and when the current special subframe is configured as 3:9:2 or 3:10:1 , the TD-LTE base station notifies the TD-LTE terminal of its ability to support the newly added special subframe configuration, and learns from the TD-LTE terminal the support capability of the TD-LTE terminal to the newly added special subframe configuration, so that The TD-LTE base station can schedule different terminals in different resources according to the TD-LTE terminal's ability to support the newly added special subframe configuration, so that under the premise of backward compatibility with existing TD-LTE terminals on the existing network, Improve system resource utilization.

The TD-LTE base station improved by adopting the technical solution of this application can support two kinds of special subframe configurations at the same time, so that the existing network terminals that have been commercialized can normally access and obtain For services, new terminals that roam to a TD-LTE base station that do not support the newly added special subframe configuration can also access and obtain services normally; while for terminals that support the newly added special subframe configuration, they can be used in the DwPTS resource The PDSCH is transmitted, and the Sounding signal is transmitted in the newly added OFDM symbol resources of the UpPTS, thereby improving the resource utilization of the system.

The above is only a preferred embodiment of the application, and is not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application should be included in the application. within the scope of protection.

Claims (10)

1. A method for improving time-division duplex long-term evolution (TD-LTE) system resource utilization, characterized in that, comprising: When the current special subframe configuration is 3:9:2 or 3:10:1, the TD-LTE base station notifies the TD-LTE base station of its ability to support both the current special subframe configuration and the ninth special subframe configuration through a system broadcast message. LTE terminal; The TD-LTE base station acquires the support capability of the TD-LTE terminal for the configuration of the ninth special subframe from the TD-LTE terminal; After the TD-LTE terminal accesses, only the data service and/or paging message of the TD-LTE terminal supporting the ninth special subframe configuration is scheduled in the downlink pilot time slot (DwPTS) resource. 2. The method according to claim 1, characterized in that: The configuration of the ninth special subframe is any one of 6:6:2, 6:5:3, 6:4:4, and 6:3:5. 3. The method according to claim 1 or 2, characterized in that the method further comprises: After the TD-LTE terminal accesses, the TD-LTE terminal that only supports the configuration of the ninth special subframe configures an additional OFDM symbol in the ninth special subframe compared to the uplink pilot time slot (UpPTS) configured in the current special subframe Among the resources, the sounding (Sounding) signal is scheduled to be transmitted. 4. The method according to claim 1 or 2, characterized in that: The TD-LTE base station notifies the TD-LTE terminal of its ability to simultaneously support the current special subframe configuration and the ninth special subframe configuration by carrying an identifier in the system information block whether it supports the ninth special subframe configuration; The TD-LTE base station receives the user equipment capability information (UECapabilityInformation) message from the TD-LTE terminal, and obtains the TD-LTE terminal's support for the ninth special subframe configuration according to the identifier of whether the ninth special subframe configuration is supported in the UECapabilityInformation message ability. 5. The method according to claim 1 or 2, characterized in that: The transport block size (TBS) N _PRB of the physical downlink shared channel (PDSCH) in the DwPTS subframe configured in the ninth special subframe is calculated according to the following formula:

Wherein, N' _PRB is the number of physical resource blocks actually allocated by the DwPTS subframe configured by the TD-LTE base station in the ninth special subframe; α is a preset parameter. 6. A Time Division Duplex Long Term Evolution (TD-LTE) base station for improving system resource utilization, characterized in that it includes: a capability indication module, a capability collection module and a scheduling module, wherein: When the current special subframe configuration is 3:9:2 or 3:10:1, the capability indication module is used to simultaneously support the current special subframe configuration and the ninth special subframe by the TD-LTE base station through a system broadcast message The configured capability notifies the TD-LTE terminal; The capability collection module is used to obtain the support capability of the TD-LTE terminal for the configuration of the ninth special subframe from the TD-LTE terminal; After the TD-LTE terminal accesses, the scheduling module is used to only schedule the data service and/or paging message of the TD-LTE terminal supporting ninth special subframe configuration in the downlink pilot time slot (DwPTS) resource. 7. TD-LTE base station according to claim 6, is characterized in that: The configuration of the ninth special subframe is any one of 6:6:2, 6:5:3, 6:4:4, and 6:3:5. 8. The TD-LTE base station according to claim 6 or 7, characterized in that: After the TD-LTE terminal accesses, the scheduling module is also used to only schedule support in the OFDM symbol resources increased in the ninth special subframe configuration compared to the uplink pilot time slot (UpPTS) configured in the current special subframe The TD-LTE terminal configured in the ninth special subframe transmits the Sounding signal. 9. The TD-LTE base station according to claim 6 or 7, characterized in that: The capability indication module notifies the TD-LTE terminal of the ability of the TD-LTE base station to simultaneously support the current special subframe configuration and the ninth special subframe configuration by carrying an identifier of whether the ninth special subframe configuration is supported in the system information block ; The capability collection module is used to receive a user equipment capability information (UECapabilityInformation) message from a TD-LTE terminal, and obtain the configuration of the ninth special subframe by the TD-LTE terminal according to the identifier of whether the configuration of the ninth special subframe is supported in the UECapabilityInformation message. configuration support. 10. The TD-LTE base station according to claim 6 or 7, characterized in that: The scheduling module calculates the transport block size (TBS) N _PRB of the physical downlink shared channel (PDSCH) in the DwPTS subframe configured in the ninth special subframe according to the following formula: Wherein, N' _PRB is the number of physical resource blocks actually allocated by the DwPTS subframe configured by the TD-LTE base station in the ninth special subframe; α is a preset parameter.

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