CN102035594B - Data transmitting method and device and radio frame - Google Patents
Data transmitting method and device and radio frame Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
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Abstract
The invention provides data transmitting method and device and a radio frame. In the method, a preset uplink and downlink configuration mode is set, wherein by the preset upstream and downstream configuration mode, 10 subframes in one radio frame is configured in such a way that a first subframe, a fifth subframe, a sixth subframe, a ninth subframe and a tenth subframe are downlink subframes, a third subframe, a fourth subframe and a eighth subframe are upstream subframes, and a second subframe and a seventh subframe are special subframes. The invention has the advantage of improving the stability of upstream and downstream transfer of the subframes.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a data transmission method, an apparatus, and a radio frame.
Background
In a wireless system that performs data transmission in units of Radio frames (Radio frames), uplink/downlink of wireless air interface transmission generally performs data transmission in units of Radio frames; each Radio frame is composed of a plurality of subframes (subframes), and each Subframe is composed of an Orthogonal Frequency Division Multiplexing (OFDM) Symbol (Symbol) as a basic unit. For a Long-term evolution (Long-term evolution, LTE for short) system, each Radio frame consists of 10 subframes.
The current LTE, Worldwide Interoperability for Microwave Access (Wimax), and Ultra Mobile Broadband (UMB) systems have two duplex modes: frequency Division Duplex (FDD) and Time Division Duplex (TDD) modes.
In the FDD mode, different frequency bands are used for uplink and downlink for data transmission, so that the resource allocation of uplink and downlink Subframes (Subframes) of the system is relatively independent, that is, the resource allocation can be performed on the downlink Subframes (Subframes) and the uplink Subframes (Subframes), respectively.
In the TDD mode, since the uplink/downlink channels use the same frequency band for time division transmission, the system can divide a plurality of subframes of a radio frame into uplink subframes and downlink subframes according to a certain proportion according to the service requirement. The proportion of the number of the uplink subframes and the number of the downlink subframes of a general TDD system have a plurality of types so as to meet the requirements of different service types.
According to the requirements of different regional service types, the appropriate uplink and downlink proportion configuration is selected, which is favorable for improving the frequency spectrum efficiency of the TDD system. For example, for an area with more data downloading services, a configuration with more downlink subframes can be selected; for the area with more uploaded data services, the configuration with more uplink subframes can be selected; for the area with balanced uplink and downlink data traffic, the proportion configuration with almost equal uplink and downlink sub-frames can be selected. In the current LTE TDD (or TD-LTE) system, 7 TDD uplink and downlink ratio configurations are set, as shown in table 1 below. One radio frame includes 10 subframes, and subframe numbers are respectively marked as: 0,1,2,3,4,5,6,7,8,9. "D" indicates that the subframe is a downlink subframe; "U" indicates that the subframe is an uplink subframe; "S" indicates that the subframe is a special subframe, i.e., the subframe includes both uplink and downlink transmission portions.
Table 1 uplink and downlink subframe configuration table
In the data transmission method in the related art, for a TDD system region with a certain configuration, when the region has different service type requirements, the region needs to be converted into another uplink and downlink configuration, so as to improve the spectrum efficiency of the TDD system. For example, if a TDD system region configured as 1 is adopted, when the downlink data traffic in the region increases, the region needs to be converted into a TDD system configured as 2 with relatively more downlink subframes. Thus, it may happen that the subframe originally sending the uplink data does not send the uplink data any more, but sends the downlink data instead. However, in the process, a plurality of subframes are simultaneously switched between the uplink subframe and the downlink subframe, which causes the sending position of the control information to be more complex and disordered when dynamically changing, thereby causing the complexity of system processing to be higher and causing system interruption.
Disclosure of Invention
The present invention provides a data transmission method, a data transmission device and a radio frame, so as to solve the problems of high system processing complexity and system interruption caused by the data transmission method in the related art.
In order to achieve the above object, according to an aspect of the present invention, a data transmission method is provided, which is applied to a time division duplex TDD system.
The data transmission method comprises the following steps: setting a preset uplink and downlink configuration mode, wherein the preset uplink and downlink configuration mode configures 10 subframes in a wireless frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes; and carrying out data transmission by using a preset uplink and downlink configuration mode.
Further, the main carrier uses one of the uplink and downlink configuration modes of the LTE R8 TDD system to configure the radio frame thereon; the secondary carrier configures the wireless frame thereon by using a configuration mode of one of the following modes: the predetermined uplink and downlink configuration mode and one of the uplink and downlink configuration modes of the LTE R8 TDD system.
Further, the uplink and downlink configuration modes 0 to 6 of the LTE R8 TDD system are shown in table 1 below: the D identification subframe is a downlink subframe, the U identification subframe is an uplink subframe, and the S identification subframe is a special subframe.
Further, the method further comprises: when the radio frame configuration is converted from an uplink configuration mode 1 to an uplink configuration mode 2, firstly, the radio frame configuration is converted from the uplink configuration mode 1 to a preset uplink configuration mode; and then converting the radio frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink configuration mode 2, wherein only one subframe in one radio frame is changed in the process of converting the uplink and downlink configuration mode each time, and the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: when the radio frame configuration is converted from an uplink subframe configuration mode 2 to an uplink subframe configuration mode 1, firstly, the radio frame configuration is converted from the uplink subframe configuration mode 2 to a preset uplink subframe configuration mode; and then converting the radio frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink configuration mode 1, wherein only one subframe in one radio frame is changed in the process of converting the uplink and downlink configuration mode each time, and the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: when the radio frame configuration is converted from an uplink configuration mode 1 to an uplink configuration mode 3, firstly, the radio frame configuration is converted from the uplink configuration mode 1 to a preset uplink configuration mode; and then converting the wireless frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink configuration mode 3, wherein the wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: when the radio frame configuration is converted from an uplink configuration mode 3 to an uplink configuration mode 1, firstly, the radio frame configuration is converted from the uplink configuration mode 3 to a preset uplink configuration mode; and then converting the wireless frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink configuration mode 1, wherein the wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: the radio frame configuration is converted using the following sequence: an uplink and downlink configuration mode 0- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 1- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 2- > an uplink and downlink configuration mode 5, wherein a wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: the radio frame configuration is converted using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 4- > an uplink and downlink configuration mode 3- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame is configured as one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Further, the method further comprises: the radio frame configuration is converted using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 2- > a predetermined uplink and downlink configuration mode-an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
In order to achieve the above object, according to another aspect of the present invention, there is provided a data transmission apparatus.
The data transmission apparatus according to the present invention includes: a setting module, configured to set a predetermined uplink and downlink configuration mode in a subframe format of a radio frame, where the predetermined uplink and downlink configuration mode configures 10 subframes in one radio frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes; and the transmission module is used for transmitting data by using a preset uplink and downlink configuration mode.
In order to achieve the above object, according to still another aspect of the present invention, there is also provided a radio frame.
The radio frame according to the present invention includes 10 subframes, wherein the first, fifth, sixth, ninth and tenth subframes are downlink subframes, the third, fourth and eighth subframes are uplink subframes, and the second and seventh subframes are special subframes.
According to the invention, a preset uplink and downlink configuration mode is adopted, wherein the preset uplink and downlink configuration mode configures 10 subframes in a wireless frame into: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes, so that the problems that in the subframe format conversion process in the related art, a plurality of subframes are simultaneously converted in the uplink subframes and the downlink subframes, the transmission position of control information is complex and disordered when the control information is dynamically changed, the complexity of system processing is high, and the system is interrupted are solved. Therefore, the stability of the uplink and downlink conversion of the sub-frame is improved, and the reliability of the system is further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flow chart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a block diagram of a data transmission apparatus according to an embodiment of the present invention; and
fig. 3 is a block diagram of a preferred configuration of a data transmission apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present embodiment provides a data transmission method applied to a Time Division Duplex (TDD) system, and fig. 1 is a flowchart of the data transmission method according to the embodiment of the present invention, as shown in fig. 1, the method includes:
step S102: setting a preset uplink and downlink configuration mode in a subframe format of a wireless frame, wherein the preset uplink and downlink configuration mode configures 10 subframes in one wireless frame into: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes;
step S104: carrying out data transmission by using a preset uplink and downlink configuration mode;
through the steps, a preset uplink and downlink configuration mode is set, and the preset uplink and downlink configuration mode configures 10 subframes in a wireless frame as follows: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes, so that the problems that in the subframe format conversion process in the related art, a plurality of subframes are simultaneously converted in the uplink subframes and the downlink subframes, the transmission position of control information is complex and disordered when the control information is dynamically changed, the complexity of system processing is high, and the system is interrupted are solved. Therefore, the stability of the uplink and downlink conversion of the sub-frame is improved, and the reliability of the system is further improved.
Preferably, the primary carrier configures the subframe thereon by using one of the uplink and downlink configuration modes of the LTE R8 TDD system; the secondary carrier configures the subframe thereon by using a configuration mode of one of the following modes: the predetermined uplink and downlink configuration mode and one of the uplink and downlink configuration modes of the LTE R8 TDD system. By the preferred embodiment, the configuration of the main carrier according to the subframe format specified by the existing protocol is ensured, and the configuration of the auxiliary carrier according to the subframe format and the converted subframe format specified by the existing protocol is ensured, so that the compatibility of the existing system is realized, and the flexibility of subframe configuration is improved.
It should be noted that the uplink and downlink configuration defined in the above configuration is an uplink and downlink configuration that the LTE R8 TDD system has, but the data transmission scheme in this embodiment is also applicable to not only the LTE R8 TDD system but also other versions of the LTE TDD system compatible with the LTE R8 TDD system, because of backward compatibility of the LTE system, and the R9 or R10 series of TDD systems also include, but are not limited to, the above uplink and downlink configuration.
Preferably, the uplink and downlink configuration modes 0 to 6 configured in the LTE R8 TDD system are shown in table 1: the D identification subframe is a downlink subframe, the U identification subframe is an uplink subframe, and the S identification subframe is a special subframe. By the preferred embodiment, the stable conversion of the uplink and downlink configuration formats is realized under the subframe format configured by the existing protocol, and the system stability is improved.
Preferably, the method further comprises: when the radio frame configuration is converted from an uplink configuration mode 1 to an uplink configuration mode 2, firstly, the radio frame configuration is converted from the uplink configuration mode 1 to a preset uplink configuration mode; and then converting the radio frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink configuration mode 2, wherein only one subframe in one radio frame is changed in the process of converting the uplink and downlink configuration mode each time, and the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Preferably, when the radio frame configuration is converted from the uplink and downlink subframe configuration mode 2 to the uplink and downlink subframe configuration mode 1, the radio frame configuration is first converted from the uplink and downlink subframe configuration mode 2 to a predetermined uplink and downlink configuration mode; and then converting the radio frame configuration from a preset uplink and downlink configuration mode to an uplink and downlink subframe configuration mode 1, wherein only one subframe in one radio frame is changed in each uplink and downlink configuration mode conversion process, and the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
Preferably, the method further comprises: when the radio frame configuration is converted from an uplink subframe configuration mode 1 to an uplink subframe configuration mode 3, firstly, the radio frame configuration is converted from the uplink subframe configuration mode 1 to a preset uplink subframe configuration mode; and then converting the subframe configuration from a preset uplink and downlink configuration mode into an uplink and downlink subframe configuration mode 3, wherein the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier. By the preferred embodiment, the wireless frame configuration of the cell or the carrier is stably converted from the mode 1 to the mode 3, and the conversion efficiency and the stability are improved.
Preferably, when the radio frame configuration is converted from the uplink and downlink subframe configuration mode 3 to the uplink and downlink subframe configuration mode 1, the radio frame configuration is first converted from the uplink and downlink subframe configuration mode 3 to a predetermined uplink and downlink configuration mode; and then converting the radio frame configuration from a preset uplink and downlink configuration mode into an uplink and downlink subframe configuration mode 1, wherein the radio frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier. By the preferred embodiment, the wireless frame configuration of the cell or the carrier is stably converted from the mode 3 to the mode 1, and the conversion efficiency and the stability are improved.
Preferably, the conversion of the radio frame configuration is performed using the following order: an uplink and downlink subframe configuration mode 0- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 1- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 2- > an uplink and downlink configuration mode 5, wherein a wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier. By the preferred embodiment, the wireless frame configuration of the cell or the carrier can be stably converted from the mode with more uplink subframes to the mode with more downlink subframes, and the conversion efficiency and the conversion stability are improved.
Preferably, the conversion of the radio frame configuration is performed using the following order: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 4- > an uplink and downlink configuration mode 3- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame is configured as one of the following: radio frame configuration of a cell, radio frame configuration of a carrier. By the preferred embodiment, the stable conversion of the radio frame configuration of the cell or the carrier from a mode with more downlink subframes to a mode with more uplink subframes is realized, and the conversion efficiency and the stability are improved.
Preferably, the conversion of the radio frame configuration is performed using the following order: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 2- > a predetermined uplink and downlink configuration mode-an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier. By the preferred embodiment, the smooth conversion of the radio frame configuration of the cell or the carrier from the mode of more downlink subframes to the mode of more uplink subframes is realized, and the conversion efficiency and the conversion stability are improved.
PREFERRED EMBODIMENTS
In this embodiment, the UL-DL configuration mode of the data transmission method may be used in an independent TDD system region, or may be used in a certain subcarrier TDD configuration in a multicarrier system.
In this embodiment, a radio frame includes 10 subframes, and the subframe numbers are respectively marked as: 0,1,2,3,4,5,6,7,8,9. Subframe 0 is a downlink subframe; subframe 1 is a special subframe; subframes 2 and 3 are uplink subframes; subframes 4 and 5 are downlink subframes; subframe 6 is a special subframe; subframe 7 is an uplink subframe; subframes 8 and 9 are downlink subframes;
TABLE 2 sub-frame Transmission Format schematic
As can be seen from Table 2: one radio frame includes 10 subframes, and subframe numbers are respectively marked as: 0,1,2,3,4,5,6,7,8,9. "D" indicates that the subframe is a downlink subframe; "U" indicates that the subframe is an uplink subframe; "S" indicates that the subframe is a special subframe, i.e., the subframe includes both uplink and downlink transmission portions.
In this embodiment, the new TDD uplink and downlink configuration mode is referred to as: uplink and downlink configuration 7. The TDD system uses 3 bits of data to represent 8 uplink and downlink configurations; tabulated as follows:
table 3 schematic table of uplink and downlink subframe configuration
As can be seen from table 3, 7 uplink and downlink configurations of the original time division long term evolution (TD-LTE) system need 3 bits of data to represent, and the TDD system encodes the 3 bits of data according to a certain rule to represent 8 uplink and downlink configurations. Now, after a new uplink and downlink configuration mode is added, the data can still be represented by 3 bits. Therefore, the system overhead is not additionally increased, and the 3-bit data resource can be fully utilized.
The data transmission method in the embodiment includes the following steps:
the first method is as follows: when a cell adopting the TDD uplink-downlink configuration 1 is to be converted into the TDD uplink-downlink configuration 2, the cell needs to be converted into the TDD uplink-downlink configuration 7 first, and then into the TDD uplink-downlink configuration 2; similarly, when a cell adopting TDD uplink/downlink configuration 2 is to be converted into TDD uplink/downlink configuration 1, the cell needs to be converted into TDD uplink/downlink configuration 7 first, and then into TDD uplink/downlink configuration 1.
It should be noted that, in a radio frame, TDD uplink/downlink configuration 7 has only one more downlink subframe than configuration 1, and configuration 2 has only one more downlink subframe than configuration 7. The configuration 1 is firstly converted into the configuration 7 and then converted into the configuration 2, or the configuration 2 is firstly converted into the configuration 7 and then converted into the configuration 1, so that the TDD uplink and downlink configuration change of the cell has continuity, and the method is favorable for ensuring that the service in progress is not interrupted and reducing the complexity of system processing.
Mode two
When the carrier adopting the TDD uplink-downlink configuration 1 is to be converted into the TDD uplink-downlink configuration 2, the carrier needs to be converted into the TDD uplink-downlink configuration 7 first, and then into the TDD uplink-downlink configuration 2; similarly, when the carrier adopting the TDD uplink/downlink configuration 2 is to be converted into the TDD uplink/downlink configuration 1, the carrier needs to be converted into the TDD uplink/downlink configuration 7 first, and then into the TDD uplink/downlink configuration 1.
It should be noted that, for the TDD system region configured as 1, when the downlink data traffic in the region is increased, the region needs to be converted into a TDD system configured as 2 with relatively more downlink subframes. Thus, it may happen that the subframe originally sending the uplink data does not send the uplink data any more, but sends the downlink data instead. 2 subframes in a radio frame are different between configuration 1 and configuration 2, if a system needs to dynamically change between configuration 1 and configuration 2, the sending position of control information is complex and chaotic when the system changes dynamically, and service interruption is easily caused. Therefore, if the TD-LTE system is to realize efficient dynamic transformation between configuration 1 and configuration 2, configuration 7 is used for intermediate transformation, so as to ensure smooth transformation of uplink and downlink configurations without service interruption, and reduce the complexity of system transformation.
If the TD-LTE system adopting the configuration 1 is adjacent to the TD-LTE system adopting the configuration 2, a region needs to be configured by adopting a null subframe in the middle to isolate uplink and downlink interference. However, since 2 subframes are set as empty subframes in a radio frame, the resource waste of the middle region is large, and the efficiency of the whole TD-LTE system network may be reduced.
Mode III
When a cell adopting the TDD uplink/downlink configuration 3 is to be converted into the TDD uplink/downlink configuration 1, the cell needs to be converted into the TDD uplink/downlink configuration 7 first, and then into the TDD uplink/downlink configuration 1, and similarly, when a carrier adopting the TDD uplink/downlink configuration 3 is to be converted into the TDD uplink/downlink configuration 1, the carrier needs to be converted into the TDD uplink/downlink configuration 7 first, and then into the TDD uplink/downlink configuration 1.
In this embodiment, in one radio frame, TDD uplink/downlink configuration 7 has one more downlink subframe than configuration 1, and configuration 3 has one more downlink subframe than configuration 7. The configuration 3 is firstly converted into the configuration 7 and then converted into the configuration 1, so that the TDD uplink and downlink configuration change of the cell has continuity, and the method is favorable for ensuring that the service in progress is not interrupted and reducing the complexity of system processing.
Mode IV
When the carrier adopting the TDD uplink/downlink configuration 3 is to be converted into the TDD uplink/downlink configuration 1, the carrier needs to be converted into the TDD uplink/downlink configuration 7 first, and then into the TDD uplink/downlink configuration 1, and similarly, when the carrier adopting the TDD uplink/downlink configuration 1 is to be converted into the TDD uplink/downlink configuration 3, the carrier needs to be converted into the TDD uplink/downlink configuration 7 first, and then into the TDD uplink/downlink configuration 3.
Mode five
When a cell is switched from an uplink configuration with more uplink to a downlink configuration with more downlink, the switching needs to be performed according to the following switching sequence:
configuration 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
Mode six
When a certain carrier is switched from the configuration with more uplink to the configuration with more downlink, the switching needs to be performed according to the following switching sequence:
configuration 0- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
Mode eight
When a cell is switched from a configuration with more downlink to a configuration with more uplink, the switching needs to be performed according to the following switching sequence:
configuration 5- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
The ninth mode
When a certain carrier is switched from a configuration with more downlink to a configuration with more uplink, the switching needs to be performed according to the following switching sequence:
configuration 5- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
A cross mode
When the cell is switched from the downlink configuration with more downlink to the uplink configuration with more uplink, the following switching sequence can be performed:
configuration 5- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
It can be seen that, after the TDD uplink and downlink configuration 7 is added, the uplink and downlink configuration change of the TD-LTE system is more continuous, which is beneficial to ensuring that the service in progress is not interrupted and reducing the complexity of system processing.
Mode eleven
When a certain carrier is switched from a configuration with more downlink to a configuration with more uplink, the following switching sequence can be performed according to another switching sequence:
configuration 5- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -.
Preferably, in the multi-carrier TDD system, the primary carrier adopts any one of 7 configurations, i.e. uplink and downlink configuration 0, configuration 1, configuration 2, configuration 3, configuration 4, configuration 5 and configuration 6; any one of 8 configurations, i.e., uplink and downlink configurations 0 to 7, may be used for a certain subcarrier. Therefore, the backward compatibility problem of the terminal can be well kept by adopting the original configuration of the main carrier; the new configuration 7 of the sub-carriers can enhance the flexibility of the terminal in dynamic change of the TDD configuration.
It should be noted that the TDD frame structure with a 5ms period is more advantageous than the TDD frame structure with a 10ms period in the aspect of delay sensitive services, so that the method of the present embodiment is used within one 5ms period, and configuration 7 is added, so that the system configuration is more reasonable. And the uplink and downlink proportion of the configuration 7 is more suitable for the current data service type, the use frequency is very high, and the transmission efficiency of the system is improved. The ratio of uplink transmission resources and downlink transmission resources in the two modes of configuration 1 and configuration 2 is moderate, and the method can adapt to the use of service types in areas with changing types, so that more configurations 1 and 2 are adopted in the practical application of the TD-LTE system. Thus, if a configuration 7 is added between configuration 1 and configuration 2, the application scenarios of the new configuration are more, and the data transmission of the system can be optimized.
This embodiment provides a data transmission apparatus, and fig. 2 is a block diagram of a data transmission apparatus according to an embodiment of the present invention, and as shown in fig. 2, the apparatus includes: a setting module 22 and a transmission module 24, the above structure being described in detail below:
a setting module 22, configured to set a predetermined uplink and downlink configuration mode in a subframe format of a radio frame, where the predetermined uplink and downlink configuration mode configures 10 subframes in one radio frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes; and a transmission module 24, connected to the setting module 22, for performing data transmission using the predetermined uplink and downlink configuration manner set by the setting module 22.
Fig. 3 is a block diagram of a preferred structure of a data transmission apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus further includes: the first subframe configuration module 32, the second subframe configuration module 34, the first conversion sub-module 241, the first format conversion sub-module 242, the second conversion sub-module 243, the second format conversion sub-module 244, the third conversion sub-module 245, the third format conversion sub-module 246, the fourth conversion sub-module 247, the fourth format conversion sub-module 248, the fifth conversion sub-module 249, the sixth conversion sub-module 250, and the seventh conversion sub-module 251, which are described in detail below:
the above-mentioned device still includes: a first subframe configuration module 32, configured to configure a subframe on which a primary carrier configures using one of uplink and downlink configuration modes of an LTE R8 TDD system; a second subframe configuration module 34, configured to configure, by the secondary carrier, a subframe thereon using a configuration manner of one of the following: the predetermined uplink and downlink configuration mode and one of the uplink and downlink configuration modes of the LTE R8 TDD system.
A first converting submodule 241, configured to convert the radio frame configuration from the uplink configuration mode 1 to a predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 1 to the downlink configuration mode 2; a first format conversion submodule 242, connected to the first conversion submodule 241, configured to convert the radio frame configuration obtained by conversion by the first conversion submodule 241 from a predetermined uplink and downlink configuration mode to an uplink and downlink configuration mode 2, where only one subframe in one radio frame changes during a process of converting the uplink and downlink configuration mode each time, and the radio frame configuration is one of: radio frame configuration of a cell, radio frame configuration of a carrier.
A second converting submodule 243, configured to convert the radio frame configuration from the uplink configuration mode 2 to a predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 2 to the uplink configuration mode 1; a second format conversion submodule 244, connected to the second conversion submodule 243, and configured to convert the radio frame configuration obtained by conversion by the second conversion submodule 243 from a predetermined uplink and downlink configuration mode to an uplink and downlink configuration mode 1, where, in the process of converting the uplink and downlink configuration modes each time, only one subframe in one radio frame is changed, and the radio frame configuration is one of: radio frame configuration of a cell, radio frame configuration of a carrier.
A third converting sub-module 245, configured to convert the radio frame configuration from the uplink/downlink subframe configuration mode 1 to a predetermined uplink/downlink configuration mode when the radio frame configuration is converted from the uplink/downlink configuration mode 1 to the uplink/downlink configuration mode 3; a third format conversion submodule 246, connected to the third conversion submodule 245, configured to convert the radio frame configuration obtained by the conversion performed by the third conversion submodule 245 from a predetermined uplink and downlink configuration mode to an uplink and downlink configuration mode 3, where the radio frame configuration is one of: subframe radio frame configuration of a cell and radio frame configuration of a carrier.
A fourth converting submodule 247, configured to convert the radio frame configuration from the uplink configuration mode 3 to a predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 3 to the downlink configuration mode 1; a fourth format conversion submodule 248, connected to the fourth conversion submodule 247, configured to convert the radio frame configuration obtained by conversion by the fourth conversion submodule 247 from a predetermined uplink and downlink configuration mode to an uplink and downlink configuration mode 1, where the radio frame configuration is one of: radio frame configuration of a cell, radio frame configuration of a carrier.
A fifth converting sub-module 249, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 0- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 1- > a predetermined uplink and downlink configuration mode- > an uplink and downlink subframe configuration mode 2- > an uplink and downlink subframe configuration mode 5, wherein a wireless frame is configured as one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
A sixth converting sub-module 250, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 4- > an uplink and downlink configuration mode 3- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame is configured as one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
A seventh converting submodule 251, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 2- > a predetermined uplink and downlink configuration mode-an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame configuration is one of the following: radio frame configuration of a cell, radio frame configuration of a carrier.
The embodiment provides a radio frame, which includes 10 subframes, wherein a first subframe, a fifth subframe, a sixth subframe, a ninth subframe and a tenth subframe are downlink subframes, a third subframe, a fourth subframe and an eighth subframe are uplink subframes, and a second subframe and a seventh subframe are special subframes. Through the radio frame, the conversion between the uplink configuration mode and the downlink configuration mode of the LTE R8 TDD system configuration can be simplified, for example: only one subframe changes in the conversion process of the uplink and downlink configuration mode 1 configured by the LTE R8 TDD system and the uplink and downlink configuration mode 2 configured by the LTE R8 TDD system.
In summary, the embodiments described above provide a data transmission method, an apparatus, and a radio frame, where a predetermined uplink and downlink configuration manner is set, where the predetermined uplink and downlink configuration manner configures 10 subframes in a radio frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes, so that the problems that in the subframe format conversion process in the related art, a plurality of subframes are simultaneously converted in the uplink subframes and the downlink subframes, the transmission position of control information is complex and disordered when the control information is dynamically changed, the complexity of system processing is high, and the system is interrupted are solved. Therefore, the stability of the uplink and downlink conversion of the sub-frame is improved, and the reliability of the system is further improved.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A data transmission method is applied to a Time Division Duplex (TDD) system and is characterized by comprising the following steps:
setting a preset uplink and downlink configuration mode, wherein the preset uplink and downlink configuration mode configures 10 subframes in a wireless frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes;
carrying out data transmission by using the preset uplink and downlink configuration mode;
when a radio frame configuration is converted from an uplink configuration mode 1 to a downlink configuration mode 2, firstly, the radio frame configuration is converted from the uplink configuration mode 1 to the preset uplink configuration mode; and then converting the radio frame configuration from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 2, wherein only one subframe in one radio frame is changed in each uplink and downlink configuration mode conversion process, and the radio frame configuration is one of the following configurations: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
when the radio frame configuration is converted from the uplink and downlink subframe configuration mode 2 to the uplink and downlink configuration mode 1, firstly converting the radio frame configuration from the uplink and downlink configuration mode 2 to the preset uplink and downlink configuration mode; and then converting the radio frame configuration from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 1, wherein only one subframe in one radio frame is changed in each uplink and downlink configuration mode conversion process, and the radio frame configuration is one of the following configurations: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
when the radio frame configuration is converted from the uplink and downlink configuration mode 1 to the uplink and downlink configuration mode 3, firstly converting the radio frame configuration from the uplink and downlink configuration mode 1 to the preset uplink and downlink configuration mode; and then converting the radio frame configuration from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 3, wherein the radio frame configuration is one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
when the radio frame configuration is converted from the uplink and downlink configuration mode 3 to the uplink and downlink configuration mode 1, firstly, the radio frame configuration is converted from the uplink and downlink configuration mode 3 to the preset uplink and downlink configuration mode; and then converting the radio frame configuration from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 1, wherein the radio frame configuration is one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
the radio frame configuration is converted using the following sequence: an uplink and downlink configuration mode 0- > an uplink and downlink configuration mode 6- > the uplink and downlink configuration mode 1- > the predetermined uplink and downlink configuration mode- > the uplink and downlink configuration mode 2- > an uplink and downlink configuration mode 5, wherein the wireless frame is configured as one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
the conversion of the radio frame configuration is performed using the following order: the uplink and downlink configuration mode 5- > uplink and downlink configuration mode 4- > the uplink and downlink configuration mode 3- > the predetermined uplink and downlink configuration mode- > the uplink and downlink configuration mode 1- > the uplink and downlink configuration mode 6- > the uplink and downlink configuration mode 0, wherein the wireless frame is configured as one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
the conversion of the radio frame configuration is performed using the following order: the uplink and downlink configuration mode 5- > the uplink and downlink configuration mode 2- > the predetermined uplink and downlink configuration mode-1- > the uplink and downlink configuration mode 6- > the uplink and downlink configuration mode 0, wherein the wireless frame is configured as one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier;
the uplink and downlink configuration modes 0 to 6 are uplink and downlink configuration modes of an LTE R8 TDD system.
2. The method of claim 1,
the main carrier uses one of the uplink and downlink configuration modes of the LTE R8 TDD system to configure the wireless frame thereon;
the secondary carrier configures the wireless frame thereon by using a configuration mode of one of the following modes: the predetermined uplink and downlink configuration mode is one of the uplink and downlink configuration modes of the LTE R8 TDD system.
3. The method of claim 2,
the uplink and downlink configuration modes 0 to 6 of the LTE R8 TDD system are shown in the following table:
and D marking the subframe as a downlink subframe, U marking the subframe as an uplink subframe, and S marking the subframe as a special subframe.
4. A data transmission apparatus, comprising:
a setting module, configured to set a predetermined uplink and downlink configuration mode in a subframe format of a radio frame, where the predetermined uplink and downlink configuration mode configures 10 subframes in one radio frame as: the first subframe, the fifth subframe, the sixth subframe, the ninth subframe and the tenth subframe are downlink subframes, the third subframe, the fourth subframe and the eighth subframe are uplink subframes, and the second subframe and the seventh subframe are special subframes;
the transmission module is used for transmitting data by using the preset uplink and downlink configuration mode;
wherein the transmission device further comprises:
a first conversion sub-module, configured to convert a radio frame configuration from an uplink configuration mode 1 to a predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 1 to the downlink configuration mode 2; a first format conversion sub-module, connected to the first conversion sub-module, configured to convert the radio frame configuration obtained by the conversion by the first conversion sub-module from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 2, where only one subframe in one radio frame changes during each uplink and downlink configuration mode conversion process, and the radio frame configuration is one of: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a second conversion sub-module, configured to convert the radio frame configuration from the uplink configuration mode 2 to the predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 2 to the uplink configuration mode 1; a second format conversion sub-module, connected to the second conversion sub-module, configured to convert the radio frame configuration obtained by the conversion by the second conversion sub-module from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 1, where only one subframe in one radio frame changes during each uplink and downlink configuration mode conversion process, and the radio frame configuration is one of: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a third converting sub-module, configured to convert the radio frame configuration from the uplink/downlink subframe configuration mode 1 to the predetermined uplink/downlink configuration mode when the radio frame configuration is converted from the uplink/downlink configuration mode 1 to the uplink/downlink configuration mode 3; a third format conversion sub-module, connected to the third conversion sub-module, configured to convert the radio frame configuration converted by the third conversion sub-module from the predetermined uplink and downlink configuration mode to an uplink and downlink configuration mode 3, where the radio frame configuration is one of: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a fourth converting sub-module, configured to convert the radio frame configuration from the uplink configuration mode 3 to the predetermined uplink configuration mode when the radio frame configuration is converted from the uplink configuration mode 3 to the uplink configuration mode 1; a fourth format conversion sub-module, connected to the fourth conversion sub-module, configured to convert the radio frame configuration obtained by the conversion by the fourth conversion sub-module from the predetermined uplink and downlink configuration mode to the uplink and downlink configuration mode 1, where the radio frame configuration is one of: a radio frame configuration of a cell, wherein the radio frame configuration is one of: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a fifth converting submodule, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 0- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 1- > a predetermined uplink and downlink configuration mode- > an uplink and downlink subframe configuration mode 2- > an uplink and downlink subframe configuration mode 5, wherein the wireless frame configuration is one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a sixth converting submodule, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 4- > an uplink and downlink configuration mode 3- > a predetermined uplink and downlink configuration mode- > an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein the wireless frame is configured as one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier; or,
a seventh converting submodule, configured to perform conversion of the radio frame configuration by using the following sequence: an uplink and downlink configuration mode 5- > an uplink and downlink configuration mode 2- > a predetermined uplink and downlink configuration mode-an uplink and downlink configuration mode 1- > an uplink and downlink configuration mode 6- > an uplink and downlink configuration mode 0, wherein a wireless frame configuration is one of the following: wireless frame configuration of a cell and wireless frame configuration of a carrier;
the uplink and downlink configuration modes 0 to 6 are uplink and downlink configuration modes of an LTE R8 TDD system.
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| CN201010581486.4A CN102035594B (en) | 2010-12-09 | 2010-12-09 | Data transmitting method and device and radio frame |
| PCT/CN2011/076599 WO2012075806A1 (en) | 2010-12-09 | 2011-06-29 | Data transmission method, device and radio frame |
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| CN102035594B (en) * | 2010-12-09 | 2015-05-13 | 中兴通讯股份有限公司 | Data transmitting method and device and radio frame |
| CN102223214B (en) * | 2011-06-01 | 2014-04-16 | 电信科学技术研究院 | Method and device for data transmission |
| WO2013044432A1 (en) * | 2011-09-26 | 2013-04-04 | Renesas Mobile Corporation | Timing control in flexible time division duplex configuration |
| KR101283907B1 (en) * | 2011-11-02 | 2013-07-16 | 주식회사 이노와이어리스 | TDD downlink data transmitting method in LTE system |
| WO2013133679A1 (en) * | 2012-03-09 | 2013-09-12 | 엘지전자 주식회사 | Method for transreceiving signals and apparatus for same |
| WO2014075320A1 (en) * | 2012-11-19 | 2014-05-22 | Nokia Siemens Networks Oy | Method and apparatus |
| CN104113917B (en) * | 2013-04-22 | 2017-08-25 | 普天信息技术研究院有限公司 | A kind of realize descending HARQ method during ascending-descending subframes configuration change |
| CN104348595B (en) * | 2013-07-26 | 2017-07-21 | 普天信息技术有限公司 | The transmission method and system of a kind of hybrid automatic repeat request feedback information |
| EP3139530B1 (en) | 2014-05-23 | 2018-10-10 | Huawei Technologies Co., Ltd. | Apparatus and method for determining transmission direction of secondary carrier |
| CN105763305B (en) * | 2014-12-17 | 2019-04-23 | 中国移动通信集团公司 | A kind of data transmission method and device |
| CN107026689B (en) * | 2016-01-29 | 2019-08-16 | 华为技术有限公司 | A kind of frame format configuration method, device and system |
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| CN101615947B (en) * | 2008-06-24 | 2016-10-05 | 华为技术有限公司 | Configuration ratio of uplink subframe to downlink subframe method and the method for data transmission, device |
| CN101741710B (en) * | 2008-11-04 | 2011-12-07 | 电信科学技术研究院 | Uplink-downlink configuration and receiving methods of TDD system carrier aggregation |
| CN101754329B (en) * | 2008-12-10 | 2013-06-05 | 华为技术有限公司 | Data transmission method, equipment and system |
| KR101470654B1 (en) * | 2009-01-05 | 2014-12-09 | 엘지전자 주식회사 | Method for relaying data in wireless communication system based on tdd |
| CN102035594B (en) * | 2010-12-09 | 2015-05-13 | 中兴通讯股份有限公司 | Data transmitting method and device and radio frame |
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