JP2019220977A - Communication method, base station, and user apparatus in time division duplex system - Google Patents

Abstract

To provide a time division duplex system for effectively reducing RTT and improving Data transmission efficiency.SOLUTION: A base station determines wireless frame configuration information (201) and transmits the determined wireless frame configuration information to a user apparatus UE. The wireless frame configuration information is used to instruct the UE of setting at least one of N pieces of continuous downlink sub-frames in a wireless frame as a first sub-frame, and/or the wireless frame configuration information is used to instruct the UE of setting at least one of M pieces of continuous uplink sub-frames in the wireless frame as a second sub-frame. The first sub-frame is used for uplink service transmission, the second sub-frame is used for downlink service transmission, and N and M are positive integers larger than or equal to two (202). The base station communicates with the UE by using the wireless frames configured by the wireless frame configuration information (203).SELECTED DRAWING: Figure 2

Description

  The present invention relates to the field of communication technology, and particularly to a communication method, a base station, and a user equipment in a time division duplex system.

  A Long Term Evolution (LTE) system supports a Time Division Duplex (TDD) scheme. That is, the uplink (Uplink, abbreviated UL) and the downlink (Downlink, abbreviated DL) use different time slots of the same carrier. The uplink is used for uplink communication. That is, if the user equipment (User Equipment, UE for short) has data to be transmitted to the base station, the user equipment transmits the data by using the uplink. The downlink is used for downlink communication. That is, if the base station has data to be transmitted to the user equipment, the base station transmits the data by using the downlink.

  Round trip time (RTT) is an important indicator for measuring the performance of a wireless communication system. Generally, the transmitting end receives an acknowledgment from the receiving end from the time at which the transmitting end transmits data. It means the period until receiving time.

  In the TDD system, data scheduling is generally performed by a Hybrid Automatic Repeat Request (HARQ) scheme. After transmitting data during one HARQ process, the transmitting end does not transmit the next data packet until a preset maximum feedback waiting time has elapsed. Therefore, if an ACK can be received as soon as possible, the time interval during which data packets are transmitted in one HARQ process can be reduced, RTT can be reduced, and data transmission efficiency can be improved.

  Currently, there is still no method that can effectively reduce the RTT of a TDD communication system and improve the data transmission efficiency.

  Embodiments of the present invention provide a communication method, a base station, and a user equipment in a time division duplex system for efficiently reducing RTT and improving data transmission efficiency.

According to a first aspect, one embodiment of the present invention is a communication method in a time division duplex system, the method comprising:
Determining, by the base station, radio frame configuration information;
Transmitting, by the base station, the determined radio frame configuration information to the user equipment UE, wherein the radio frame configuration information includes at least one of N consecutive downlink subframes of one radio frame. And / or the radio frame configuration information is used to instruct the UE to set one as a first subframe, and / or the radio frame configuration information comprises at least one of M consecutive uplink subframes of one radio frame. Is used to instruct the UE to set as a second subframe, the first subframe is used for uplink service transmission, and the second subframe is used for downlink service transmission , N and M are positive integers of 2 or more;
By the base station, by using a radio frame configured according to the radio frame configuration information, to communicate with the UE,
A method comprising:

  Referring to the first aspect, in a first possible implementation of the first aspect, the first subframe comprises a guard period, at least one first symbol used for uplink service transmission, And the protection period precedes the first symbol.

Referring to a first possible implementation of the first aspect, in a second possible implementation of the first aspect, the first subframe includes C symbols and the first x symbols are the first x symbols. The guard period, the last y symbols are uplink pilot time slots used for uplink service transmission, x = C / 2 and y = C / 2, or The subframe includes C symbols, the first x symbols are the guard period, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y, and x> C / 2.

  With reference to a first possible implementation of the first aspect, in a third possible implementation of the first aspect, the first subframe comprises at least one of a first subframe used for downlink service transmission. Two guard symbols are further included, wherein the second symbol precedes the guard period.

Referring to a third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the first subframe includes C symbols and the first x symbols are down. The downlink pilot time slots used for link service transmission, the last y symbols are uplink pilot time slots used for uplink service transmission, and the middle z symbols are A protection period, C = x + y + z, and x ≦ C / 2, or
The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. And the middle z symbols are the guard periods, C = x + y + z, x <C / 2, and y = C / 2.

With reference to the first aspect, or any one of the first to fourth possible implementations of the first aspect, in a fifth possible implementation of the first aspect, the second sub-frame Includes a protection period and at least one third symbol used for downlink service transmission, wherein the protection period is preceded by the third symbol.

Referring to a fifth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, the second subframe includes P symbols and the first a symbols are down. A downlink pilot time slot used for link service transmission, the last b symbols being the guard period, a = P / 2 and b = P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are the protection periods. , P = a + b, and a> P / 2.

  With reference to a fifth possible implementation of the first aspect, in a seventh possible implementation of the first aspect, the second sub-frame may include at least one second sub-frame used for uplink service transmission. It further includes four symbols, the fourth symbol being preceded by the guard period.

Referring to a seventh possible implementation of the first aspect, in an eighth possible implementation of the first aspect, the second sub-frame includes P symbols and the first a symbols are down. The downlink pilot time slots used for link service transmission, the last b symbols are uplink pilot time slots used for uplink service transmission, and the middle w symbols are The protection period, P = a + b + w and a ≦ P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. And the middle w symbols are the guard periods, P = a + b + w, a <P / 2, and b = P / 2.

With reference to the first aspect, any one of the first to eighth possible implementations of the first aspect, in a ninth possible implementation of the first aspect, the base station may include a UE Transmitting the radio frame configuration information to
Transmitting, by the base station, the radio frame configuration information to the UE by using a broadcast message; or, by the base station, radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel. Transmitting the radio frame configuration information to the UE by using PDCCH signaling;
including.

According to a second aspect, an embodiment of the present invention is a communication method in a time division duplex system, the method comprising:
Receiving, by the user equipment UE, the radio frame configuration information transmitted by the base station;
According to the radio frame configuration information, the UE determines that at least one of N consecutive downlink subframes of one radio frame is configured as a first subframe, and / or one radio Determining that at least one of the M consecutive uplink subframes of the frame is configured as a second subframe,
The first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more;
By the UE, by using the radio frame determined according to the radio frame configuration information, to communicate with the base station,
A method comprising:

  With reference to the second aspect, in a first possible implementation of the second aspect, the first subframe comprises a protection period, at least one first symbol used for uplink service transmission, , And the protection period precedes the first symbol.

With reference to a first possible implementation of the second aspect, in a second possible implementation of the second aspect, the first subframe includes C symbols and the first x symbols are the first x symbols. The guard period, the last y symbols are the uplink pilot time slots used for uplink service transmission, x = C / 2 and y = C / 2, or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, C = x + y and x> C / 2.

  With reference to a first possible implementation of the second aspect, in a third possible implementation of the second aspect, the first sub-frame may include at least one first sub-frame used for downlink service transmission. Two guard symbols are further included, wherein the second symbol precedes the guard period.

With reference to a third possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the first subframe includes C symbols and the first x symbols are down. The downlink pilot time slots used for link service transmission, the last y symbols are uplink pilot time slots used for uplink service transmission, and the middle z symbols are A protection period, C = x + y + z, and x ≦ C / 2, or
The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. And the middle z symbols are the guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  With reference to the second aspect, or any one of the first to fourth possible implementations of the first aspect, in a fifth possible implementation of the second aspect, the second sub-frame Includes a protection period and at least one third symbol used for downlink service transmission, wherein the protection period is preceded by the third symbol.

Referring to a fifth possible implementation of the second aspect, in a sixth possible implementation of the second aspect, the second sub-frame includes P symbols and the first a symbols are down. A downlink pilot time slot used for link service transmission, the last b symbols being the guard period, a = P / 2 and b = P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are the protection periods. , P = a + b, and a> P / 2.

  Referring to a fifth possible implementation of the second aspect, in a seventh possible implementation of the second aspect, the second subframe is configured to transmit at least one second subframe used for uplink service transmission. It further includes four symbols, the fourth symbol being preceded by the guard period.

Referring to a seventh possible implementation of the second aspect, in an eighth possible implementation of the second aspect, the second subframe includes P symbols, and the first a symbols are down. The downlink pilot time slots used for link service transmission, the last b symbols are uplink pilot time slots used for uplink service transmission, and the middle w symbols are The protection period, P = a + b + w and a ≦ P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. And the middle w symbols are the guard periods, P = a + b + w, a <P / 2, and b = P / 2.

According to a third aspect, one embodiment of the present invention is a base station,
A determination unit configured to determine radio frame configuration information;
A transmission unit for transmitting the radio frame configuration information determined by a determination unit to a user equipment UE, wherein the radio frame configuration information includes at least one of N consecutive downlink subframes of one radio frame. And / or the radio frame configuration information is used to instruct the UE to set one as a first subframe, and / or the radio frame configuration information comprises at least one of M consecutive uplink subframes of one radio frame. Is used to instruct the UE to set as a second subframe, the first subframe is used for uplink service transmission, and the second subframe is used for downlink service transmission , N and M are positive integers of 2 or more;
A communication unit configured to communicate with the UE by using a radio frame configured according to the radio frame configuration information;
There is further provided a base station comprising:

  Referring to a third aspect, in a first possible implementation of the third aspect, the first subframe comprises the guard period and at least one first symbol used for uplink service transmission. And the protection period precedes the first symbol.

Referring to a first possible implementation of the third aspect, in a second possible implementation of the third aspect, the first subframe includes C symbols and the first x symbols are the first x symbols. The guard period, the last y symbols are the uplink pilot time slots used for uplink service transmission, x = C / 2 and y = C / 2, or
The first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols are uplink pilot time slots used for uplink service transmission. , C = x + y and x> C / 2.

  With reference to a first possible implementation of the third aspect, in a third possible implementation of the third aspect, the first sub-frame comprises at least one of a first sub-frame used for downlink service transmission. Two guard symbols are further included, wherein the second symbol precedes the guard period.

Referring to a third possible implementation of the third aspect, in a fourth possible implementation of the third aspect, the first subframe includes C symbols and the first x symbols are down. The downlink pilot time slots used for link service transmission, the last y symbols are uplink pilot time slots used for uplink service transmission, and the middle z symbols are A protection period, C = x + y + z, and x ≦ C / 2, or
The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. And the middle z symbols are the guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  With reference to the third aspect, or any one of the first to fourth possible implementations of the third aspect, in a fifth possible implementation of the third aspect, the second subframe Includes a protection period and at least one third symbol used for downlink service transmission, wherein the protection period is preceded by the third symbol.

With reference to a fifth possible implementation of the third aspect, in a sixth possible implementation of the third aspect, the second subframe includes P symbols and the first a symbols are down. A downlink pilot time slot used for link service transmission, the last b symbols being the guard period, a = P / 2 and b = P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are the protection periods. , P = a + b, and a> P / 2.

  With reference to a fifth possible implementation of the third aspect, in a seventh possible implementation of the third aspect, the second sub-frame may include at least one second sub-frame used for uplink service transmission. It further includes four symbols, the fourth symbol being preceded by the guard period.

Referring to a seventh possible implementation of the third aspect, in an eighth possible implementation of the third aspect, the second subframe includes P symbols and the first a symbols are down. The downlink pilot time slots used for link service transmission, the last b symbols are uplink pilot time slots used for uplink service transmission, and the middle w symbols are The protection period, P = a + b + w and a ≦ P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. And the middle w symbols are the guard periods, P = a + b + w, a <P / 2, and b = P / 2.

In a third aspect, with reference to any one of the first to eighth possible implementations of the third aspect, in a ninth possible implementation of the third aspect, the transmission unit may be configured as In general,
For a base station, by using a broadcast message, transmitting the radio frame configuration information to the UE,
It is configured to send the radio frame configuration information to the UE for the base station by using radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling.

According to a fourth aspect, one embodiment of the present invention is a user equipment,
A receiving unit configured to receive the radio frame configuration information transmitted by the base station;
A determining unit, according to the radio frame configuration information, determining that at least one of N consecutive downlink subframes of one radio frame is configured as a first subframe; and / or 1 Is configured to determine that at least one of the M consecutive uplink subframes of one radio frame is configured as a second subframe, wherein the first subframe is used for uplink service transmission. , The second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more;
By using a radio frame determined according to the radio frame configuration information, a communication unit configured to communicate with the base station,
There is further provided a user device comprising:

  With reference to the fourth aspect, in a first possible implementation of the fourth aspect, the first subframe comprises a protection period and at least one first symbol used for uplink service transmission. , And the protection period precedes the first symbol.

Referring to a first possible implementation of the fourth aspect, in a second possible implementation of the fourth aspect, the first subframe includes C symbols and the first x symbols are The guard period, the last y symbols are the uplink pilot time slots used for uplink service transmission, x = C / 2 and y = C / 2, or
The first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols are uplink pilot time slots used for uplink service transmission. , C = x + y and x> C / 2.

  With reference to a first possible implementation of the fourth aspect, in a third possible implementation of the fourth aspect, the first sub-frame comprises at least one of a first sub-frame used for downlink service transmission. Two guard symbols are further included, wherein the second symbol precedes the guard period.

With reference to a third possible implementation of the fourth aspect, in a fourth possible implementation of the fourth aspect, the first subframe includes C symbols and the first x symbols are: The downlink pilot time slots used for downlink service transmission, the last y symbols are uplink pilot time slots used for uplink service transmission, and the middle z symbols are The protection period, C = x + y + z, and x ≦ C / 2, or
The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. And the middle z symbols are the guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  With reference to the fourth aspect, or any one of the first to fourth possible implementations of the fourth aspect, in a fifth possible implementation of the fourth aspect, the second subframe Includes a protection period and at least one third symbol used for downlink service transmission, wherein the protection period is preceded by the third symbol.

Referring to a fifth possible implementation of the fourth aspect, in a sixth possible implementation of the fourth aspect, the second subframe includes P symbols and the first a symbols are down. A downlink pilot time slot used for link service transmission, the last b symbols being the guard period, a = P / 2 and b = P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are the protection periods. , P = a + b, and a> P / 2.

  Referring to a fifth possible implementation of the fourth aspect, in a seventh possible implementation of the fourth aspect, the second subframe is configured to transmit at least one second subframe used for uplink service transmission. It further includes four symbols, the fourth symbol being preceded by the guard period.

Referring to a seventh possible implementation of the fourth aspect, in an eighth possible implementation of the fourth aspect, the second subframe includes P symbols and the first a symbols are down. The downlink pilot time slots used for link service transmission, the last b symbols are uplink pilot time slots used for uplink service transmission, and the middle w symbols are The protection period, P = a + b + w and a ≦ P / 2, or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. And the middle w symbols are the guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  According to an embodiment of the present invention, in a TDD system, a radio frame period is kept unchanged, and at least one of two or more consecutive downlink subframes of one radio frame is configured as a first subframe. And / or at least one of two or more consecutive uplink subframes of one radio frame is configured as a second subframe, wherein the first subframe is used for uplink service transmission; The second subframe is used for downlink service transmission. That is, a group of DL switching points is added to each radio frame. This reduces the time interval for waiting for UL / DL switching during some subframes, thereby reducing system RTT. For example, after a UE receives downlink data transmitted by a base station in a downlink subframe, the UE may provide feedback information for downlink data reception to the base station in a subsequent uplink subframe. Need to send. According to the method provided in the present invention, after the UE receives the downlink data transmitted by the base station in the downlink subframe, at least one of the at least two consecutive downlink subframes is the first As configured as a subframe, the UE may download to the base station in the first subframe instead of waiting for a subsequent uplink subframe to transmit feedback information for downlink data reception to the base station. Feedback information of link data reception can be transmitted. Thus, the time interval for waiting for UL / DL switching is reduced, thereby reducing system RTT.

FIG. 4 is a schematic structural diagram of a TDD subframe according to an embodiment of the present invention; 4 is a flowchart of a communication method in a time division duplex system according to an embodiment of the present invention. FIG. 4 is a schematic structural diagram of a first subframe according to an embodiment of the present invention. FIG. 6 is a schematic structural diagram of another TDD subframe according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram of yet another TDD subframe according to an embodiment of the present invention; 5 is a flowchart of another communication method in the time division duplex system according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of another base station according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of another user equipment according to an embodiment of the present invention;

  In order to further clarify the objects, technical solutions and advantages of the present invention, the present invention will be described below in detail with reference to the accompanying drawings. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.

  Embodiments of the present invention provide a communication method, a base station, and a user equipment in a time division duplex system for efficiently reducing RTT and improving data transmission efficiency. The method and apparatus are based on the same inventive idea. Since similar principles are used by the method and apparatus to solve the problem, the apparatus and method implementations are referenced to each other and will not be repeated herein.

  In an embodiment of the present invention, a TDD LTE system is used as an example for explanation. However, this does not mean that embodiments of the present invention are applicable only to TDD LTE systems.

  In a TDD LTE system, TDD configuration is a very important concept. Various channel configurations are implemented according to a dedicated TDD configuration. Therefore, before describing the embodiments of the present invention, first, the TDD configuration in the existing TDD LTE system will be described.

Table 1 is a TDD configuration table of the existing TDD LTE system. As shown in Table 1, in the existing TDD LTE system, there are a total of seven types of TDD configurations: 0 to 6. In the table, "D" represents a downlink subframe, "S" represents a dedicated subframe (S subframe), and "U" represents an uplink subframe (in the following description, "S", "S" The meanings of "D" and "U" are the same as defined herein, and the description will not be repeated.) In Table 1, the Downlink-to-Uplink Switch-point period for TDD configurations 0, 1, 2, and 6 is 5 ms, and the Downlink-Uplink for TDD configurations 3-5. The switching point period is 10 ms. FIG. 1 is a structural diagram of an existing subframe.
[Table 1]

  The following describes embodiments of the present invention with reference to the accompanying drawings.

  Embodiments of the present invention provide a communication method in a time division duplex system. As shown in FIG. 2, the method includes the following steps.

  Step 201: The base station determines radio frame configuration information.

  Step 202: The base station transmits the determined radio frame configuration information to the user equipment UE. The radio frame configuration information is used to instruct a UE to set at least one of N consecutive downlink subframes of one radio frame as a first subframe, and / or a radio frame configuration. The information is used to instruct the UE to set at least one of the M consecutive uplink subframes of one radio frame as a second subframe. The first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more.

  Step 203: The base station communicates with the UE by using a radio frame configured according to the radio frame configuration information.

  According to the method provided in the previous embodiment, after the base station has transmitted the downlink data to the UE in the downlink subframe, the UE may receive the downlink data and then transmit the downlink data in the subsequent uplink subframe. Therefore, it is necessary to transmit feedback information for downlink data reception to the base station. According to the method provided in the present invention, after the UE receives the downlink data transmitted by the base station in the downlink subframe, at least one of the at least two consecutive downlink subframes is the first As configured as a subframe, the UE may download to the base station in the first subframe instead of waiting for a subsequent uplink subframe to transmit feedback information for downlink data reception to the base station. Feedback information of link data reception can be transmitted. Alternatively, after the UE has transmitted uplink data to the base station in the uplink subframe, at least one of at least two consecutive uplink subframes may be provided according to the method provided in this embodiment of the present invention. One is configured as a second subframe and the base station can send feedback information to the UE in the second subframe instead of waiting until a downlink subframe to send feedback information to the UE. In this way, the time interval for waiting for UL / DL switching is reduced, and the system RTT is reduced.

  Optionally, the base station may transmit the determined radio frame configuration information to the UE in the following manner.

The base station transmits the radio frame configuration information to the UE by using the broadcast message. Or
The base station transmits the radio frame configuration information to the UE by using radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

  The first subframe may be used for uplink synchronization and uplink and downlink separation.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  In the first subframe, the second symbol used for downlink service transmission may be specifically used for transmitting a Physical Downlink Control Channel (PDCCH). May be further used to transmit a Physical Downlink Shared Channel (PDSCH). The first symbol used for uplink service transmission may be used to transmit a Sounding Reference Signal (SRS) or a Physical Random Access Channel (PRACH) signal. . The protection period is used to prevent the channel from causing uplink interference to another remote station, determine the coverage area, and further ensure that the downlink signals arrive at the base station in synchronization with the downlink service. It is used to separate the symbols used for uplink service transmission from the symbols used for transmission.

  Optionally, the base station may indicate the first subframe as an MBMS subframe. The fact that the base station communicates with the UE by using the radio frame configured according to the radio frame configuration information specifically includes: The base station uses the indicated MBMS subframe to Send MBMS data to UE. Thus, the first UE using a TTI equal to 1 ms no longer receives data after receiving the downlink control channel in the N symbols in the first subframe. When the base station communicates with the UE by using a radio frame configured according to the radio frame configuration information, the base station uses a first subframe of the configured radio frame to achieve signal measurement by the UE. Thereby, the common reference signal may be further transmitted to the UE. In this case, the UE can obtain all necessary scheduling information and the like from the first few symbols in the MBMS subframe.

  For example, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service transmissions. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, y = C / 2, and C = 14. The first UE using a TTI equal to 1 ms no longer receives data after receiving the downlink control channel in the first N symbols in the first subframe. A second UE that uses a TTI that is less than 1 ms (eg, 0.5 ms) may perform a first UE if the second UE detects downlink scheduling information of the second UE in the first few symbols in the first subframe. Other data may be received during the remaining time of the subframe. Therefore, compatibility between the first UE and the second UE is guaranteed, and mutual interference between the new version UE and the old version UE using different TTIs is avoided.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Further, the second subframe further includes at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  In the second subframe, the third symbol used for downlink service transmission may be specifically used for transmitting a PDCCH signal and further used for transmitting a PDSCH signal. Good. The fourth symbol used for uplink service transmission may be used for transmitting an SRS or PRACH signal. The protection period is used to prevent the channel from causing uplink interference to another remote station, determine the coverage area, and further ensure that the downlink signals arrive at the base station in synchronization with the downlink service. It is used to separate the symbols used for uplink service transmission from the symbols used for transmission.

  The base station may further transmit the radio frame configuration information, radio frame period length, determined TTI, and other information to another base station, where each base station communicates with the terminal by the base station. Be able to determine the position of the subframe used. This can avoid transmission interference between base stations.

  For the case where the radio frame configuration information is used to instruct the UE to set at least one of the N consecutive downlink subframes of one radio frame as a first subframe, Is given an explanation.

(1) In the TDD system, the radio frame period is constant, and the period of each subframe is also constant, and one subframe includes 14 symbols. TTI is equal to the subframe period. In a radio frame configuration, at least one of two or more consecutive downlink subframes of one radio frame is configured as a first subframe. That is, as shown in Table 2, a group of DL switching points is added to each radio frame. This reduces the time interval for waiting for UL / DL switching during some subframes, thereby reducing system RTT. In Table 2, "X" represents the first subframe.
[Table 2]

  The first subframe is configured in the following manner, but not by way of limitation, as shown in FIG. 3 (the diagram is merely an example and does not impose any particular limitations on the solutions provided in embodiments of the present invention). Good to be.

  Method 1: The first seven symbols in the first subframe are guard periods, and the last seven symbols are uplink pilot time slots used for uplink service transmission.

  Method 2: The first x symbols in the first subframe are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and 14 = x + y And x> 7.

  Method 3: The first x symbols in the first subframe are downlink pilot time slots used for downlink service transmission, and the last y symbols are used for uplink service transmission. , The middle z symbols are guard periods, 14 = x + y + z, and x ≦ 7.

  Method 4: The first x symbols in the first subframe are downlink pilot time slots used for downlink service transmission, and the last y symbols are used for uplink service transmission. Uplink pilot time slot, the middle z symbols are guard periods, 14 = x + y + z, x <7, and y = 7.

  Optionally, with the above arrangement, the radio frame period is kept unchanged and remains at 10 ms, the sub-frame period is reduced to 1 / n of the original sub-frame period, n> 1 and n> 1 Is a positive integer. The subframe may be divided evenly into n parts, and the use of symbols occupying each part remains unchanged. TTI is equal to the subframe period. For example, n = 2. In this case, after the change, the uplink subframe becomes two uplink subframes and the downlink subframe becomes two downlink subframes. Based on the above method 1 in which the first subframe is constructed, the first seven symbols are the duration of one subframe and are used together as a guard period, and the last seven symbols are the uplink pilot A time slot, which is used as one subframe that can be considered as an uplink subframe. Another method is shown in FIG.

  Optionally, the radio frame period is unchanged and may still be 10 ms, and the subframe period may be unchanged. The transmission time interval TTI is reduced. For example, the shortened TTI is 0.5 ms. For example, in method 4, for the configured first subframe, the first few symbols in the current TTI are used for downlink service transmission, and the next TTI is used for uplink service transmission. Is used as an uplink subframe of.

  (2) Generally, in a TDD system, the radio frame period is unchanged and remains at 10 ms, the subframe period can be reduced to 1 / n of the original subframe period, and n> 1, n is optionally an integer. Based on the shortening of the subframe period, at least one of the two or more consecutive downlink subframes may be configured as a first subframe.

  The configured first subframe includes a guard period and at least one first symbol used for uplink service transmission, where the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the configured first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  For example, n = 2. In this example, the sub-frame period is 0.5 ms. The TTI length is equal to the subframe period, that is, 0.5 ms. The symbol length is the same as in the existing TDD LTE system.

  In the present invention, subframes are numbered in the same numbering scheme as in existing TDD systems. That is, subframes are numbered from 0 in one radio frame. In one radio frame, the first subframe is subframe 0, the second subframe is subframe 1, and so on. The description will not be repeated thereafter.

When n = 2, there may be multiple TDD configuration methods. The following describes one of the TDD configuration methods using an example. As there are multiple possible TDD configuration methods, the methods are not listed one by one. For example, the TDD configuration method is shown in Table 3.
[Table 3]

  Note that for the TDD configurations in all the tables below, the correspondence between the subframe configuration with a TTI of less than 1 ms and the original subframe is the same as the correspondence in Table 3 and Is not repeated unless it is a special case.

  Compared to the TDD configuration of the existing TDD LTE system of Table 1, in Table 3, the downlink-uplink switching point period does not change and one original subframe is changed to two identical consecutive subframes .

  In an actual implementation, the duration of the S subframe in Table 3 may be changed depending on the different coverage scenarios considered. For example, in a small coverage scenario (ie, the cell coverage radius is not greater than a preset coverage radius threshold), only subframe 2 may be set as an S subframe, and subframe 3 is set as an uplink subframe. Good. In a 10 ms radio frame, subframe 2 and subframe 12 are S subframes, and subframe 3 and subframe 13 are changed to uplink subframes. In large coverage scenarios (i.e., cell coverage radius is greater than a preset coverage radius threshold), multiple consecutive subframes may need to be occupied as S subframes because relatively large GP lengths are required. . For example, the configuration method in Table 3 may be used and two consecutive subframes are occupied as S subframes.

  According to the foregoing principle, at least one of two or more consecutive downlink subframes is configured as a first subframe.

For example, see Table 4.
[Table 4]

  Optionally, the first subframe may further occupy the position of the two shortened subframes.

  For example, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service transmissions. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2. In this example, C = 14 is determined. The current TTI is used for downlink service transmission and includes UL data scheduling. The next TTI is used for uplink service transmission, eg, UL data transmission or UL feedback of DL data.

  In the above scenario, the corresponding TDD HARQ time series needs to be redesigned.

  The following first describes the UL HARQ time series.

  The time series for transmitting UL data is as follows.

  Step 1: Transmit UL scheduling information in DL subframe (subframe duration is 0.5 ms here) n, where the information includes UL grant information. The transmission time is assumed to be TTIn.

Step 2: After receiving the UL grant, the UE sends UL data in TTI n + k. Here, k is 4 TTI or more, and subframe n + k is a UL subframe. For example, the value of k is shown in Table 5 (the setting of the value of k is described by using the subframe configuration in Table 4 as an example).
[Table 5]

Step 3: The eNB transmits DL feedback for UL data in subframe n + k + k1. Here, k1 is 4 TTI or more, and subframe n + k + k1 is a DL subframe. For example, the value of k1 is shown in Table 6 (the value setting of k1 is described by using the subframe configuration in Table 4 as an example).
[Table 6]

  Step 4: If the eNB feeds back a NACK in subframe n + k + k1, the UE performs retransmission in subframe n + k + k1 + k.

  DL HARQ time series

  The time series for transmitting DL data is as follows.

  Step 1: eNB sends DL data to UE in subframe n. Here, subframe n is a DL subframe.

Step 2: UE transmits UL feedback to the eNB in subframe n + k2. Here, k2 is four or more subframes, and n + k2 is a UL subframe. The value of k2 is shown in Table 7 (the setting of k2 is described by using the subframe configuration in Table 4 as an example).
[Table 7]

  For the case where the radio frame configuration information is used to instruct the UE to set at least one of the M consecutive uplink subframes of one radio frame as the second subframe, Is given a specific explanation.

(1) In the TDD system, the radio frame period is constant, and the period of each subframe is also constant, and one subframe includes 14 symbols. TTI is equal to the subframe period. In a radio frame configuration, at least one of two or more consecutive uplink subframes is configured as a second subframe. That is, as shown in Table 8, the TTI is equal to, for example, 1 ms, equal to the TTI harmonic subframe period, and a group of DL switching points is added to each radio frame. This reduces the time interval for waiting for UL / DL switching during some subframes, thereby reducing system RTT. In Table 8, "E" represents the second subframe.
[Table 8]

  Optionally, the second subframe is not limited, as shown in FIG. 5 (the figure is merely an example, and does not impose any particular limitations on the solutions provided in embodiments of the present invention) May be configured in the following manner.

  (1) The second subframe includes P symbols, the first a symbols are downlink pilot time slots, the last b symbols are uplink pilot time slots, and intermediate w The symbol is a protection period, P = a + b + w, and a ≦ P / 2.

  (2) The second subframe includes P symbols, the first a symbols are downlink pilot time slots, the last b symbols are uplink pilot time slots, and intermediate w The symbol is a protection period, where P = a + b + w, a <P / 2, and b = P / 2.

  (3) The second subframe includes P symbols, the first a symbols are downlink pilot time slots, the last b symbols are guard periods, a = P / 2, and b = P / 2.

  (4) The second subframe includes P symbols, the first a symbols are downlink pilot time slots, the last b symbols are guard periods, P = a + b, and a> P / 2.

  Here, P = 14.

  Optionally, with the above arrangement, the radio frame period is kept unchanged and remains at 10 ms, the sub-frame period is reduced to 1 / n of the original sub-frame period, n> 1 and n> 1 Is a positive integer. The subframe may be divided evenly into n parts, and the use of symbols occupying each part remains unchanged. TTI is equal to the subframe period. For example, n = 2. In this case, after the change, the uplink subframe becomes two uplink subframes and the downlink subframe becomes two downlink subframes. Based on the third method described above, where the second subframe is configured, the first seven symbols are downlink pilot time slots, used as one subframe that can be considered as a downlink subframe, and Are seven sub-frame periods, and are used together as a protection period. Another method is shown in FIG.

  Optionally, the radio frame period is unchanged and may still be 10 ms, and the subframe period may be unchanged. The transmission time interval TTI is reduced. For example, the shortened TTI is 0.5 ms. For example, for a second subframe configured in a second manner, the first few symbols in the current TTI are used for downlink service transmission and the next TTI is used in the uplink subframe. And may be used for uplink service transmission.

  (2) Generally, in a TDD system, the radio frame period is unchanged and remains at 10 ms, the subframe period can be reduced to 1 / n of the original subframe period, and n> 1, n is optionally an integer.

  Based on the shortening of the subframe period, at least one of the two or more consecutive downlink subframes may be configured as a second subframe.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Further, the second subframe further includes at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  For example, n = 2. In this example, the sub-frame period is 0.5 ms. The TTI length is equal to the subframe period, that is, 0.5 ms. The symbol length is the same as in the existing TDD LTE system.

  When n = 2, there may be multiple TDD configuration methods. The following describes one of the TDD configuration methods using an example. As there are multiple possible TDD configuration methods, the methods are not listed one by one. For example, the TDD configuration method is shown in Table 3.

  Compared to the TDD configuration of the existing TDD LTE system of Table 1, in Table 3, the downlink-uplink switching point period does not change and one original subframe is changed to two identical consecutive subframes .

  In an actual implementation, the duration of the S subframe in Table 3 may be changed depending on the different coverage scenarios considered. For example, in a small coverage scenario (ie, the cell coverage radius is not greater than a preset coverage radius threshold), only subframe 2 may be set as an S subframe, and subframe 3 is set as an uplink subframe. Good. In a 10 ms radio frame, subframe 2 and subframe 12 are S subframes, and subframe 3 and subframe 13 are changed to uplink subframes.

  In large coverage scenarios (i.e., cell coverage radius is greater than a preset coverage radius threshold), multiple consecutive subframes may need to be occupied as S subframes because relatively large GP lengths are required. . For example, the configuration method in Table 3 may be used and two consecutive subframes are occupied as S subframes.

  Based on this, at least one of the two or more consecutive uplink subframes is configured as a second subframe for downlink service transmission or for downlink service transmission and uplink service transmission. good. A group of DL switching points is added to each radio frame. This reduces the time interval for waiting for UL / DL switching during some subframes, thereby reducing system RTT.

For example, refer to Table 9.
[Table 9]

  Optionally, the second subframe may further occupy the position of the two shortened subframes, with a TTI equal to 0.5 ms.

  Method 1: The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are guard periods. Yes, a = P / 2 and b = P / 2.

  Specifically, the current TTI is used as a DL subframe for transmission (both DL grant and DL data) or for transmission of UL grant, and the next TTI is used as GP.

  Method 2: The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are guard periods. Yes, P = a + b, and a> P / 2.

  Specifically, the current TTI is used for DL data and DL permission / UL permission. The first few symbols in the next TTI are used only for PDCCH. GP is used for DL-UL switching.

  Method 3: The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle w symbols are guard periods, P = a + b + w, and a ≦ P / 2.

  Specifically, the first few symbols in the current TTI are used for downlink service transmission, and the last some symbols in the next TTI are used for uplink service transmission. .

  Method 4: The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  Specifically, the PDCCH symbols that occupy some symbols are present in the current TTI (0.5 ms), are used to transmit UL grants, and the GP that occupies some symbols is: An intermediate time slot of the next TTI (0.5 ms) is used as a hold UL subframe for transmitting UL data.

  Specifically, the GP length may be determined according to the cell coverage radius. If the cell coverage radius is larger than a preset coverage radius threshold, a dedicated subframe may be configured in method 1. If the cell coverage radius is smaller than a preset coverage radius threshold, the dedicated subframe may be configured by any one of methods 2 to 4.

  Optionally, the base station communicates with the UE by using the radio frame configured according to the radio frame configuration information, specifically, by using the uplink pilot time slot in the second subframe, Receiving the uplink control information and / or the uplink data transmitted by the. The uplink control information includes at least one of uplink response information, uplink scheduling information, or channel state information.

  Optionally, the base station is further configured to determine a time sequence of the HARQ process to perform data transmission with the UE, and to perform data transmission with the UE during the determined time sequence of the HARQ process. .

  In the above scenario, the corresponding TDD HARQ time series needs to be redesigned.

  The following first describes the UL HARQ time series.

  The time series for transmitting UL data is as follows.

  Step 1: Transmit UL scheduling information in DL subframe (subframe duration is 0.5 ms here) n, where the information includes UL grant information. The transmission time is assumed to be TTIn.

Step 2: After receiving the UL grant, the UE sends UL data in TTI n + k. Here, k is 4 TTI or more, and subframe n + k is a UL subframe. For example, the value of k is shown in Table 10 (the setting of k is described by using the subframe configuration in Table 9 as an example).
[Table 10]

Step 3: The eNB transmits DL feedback for UL data in subframe n + k + k1. Here, k1 is 4 TTI or more, and subframe n + k + k1 is a DL subframe. For example, the value of k1 is shown in Table 11 (the value setting of k1 is described by using the subframe configuration in Table 9 as an example).
[Table 11]

  Step 4: If the eNB feeds back a NACK in subframe n + k + k1, the UE performs retransmission in subframe n + k + k1 + k.

  The following describes the UL HARQ time series.

  The time series for transmitting DL data is as follows.

  Step 1: eNB sends DL data to UE in subframe n. Here, subframe n is a DL subframe.

Step 2: UE transmits UL feedback to the eNB in subframe n + k2. Here, k2 is four or more subframes, and n + k2 is a UL subframe. The values of k2 are shown in Table 12 (the setting of the value of k2 is described by using the subframe configuration in Table 9 as an example).
[Table 12]

  Based on the same inventive concept as that of the embodiment shown in FIG. 2, one embodiment of the present invention further provides another communication method in a time division duplex system. The same contents as in the embodiment shown in FIG. 2 are not repeated here. As shown in FIG. 6, the method includes the following steps.

  Step 601: The UE receives the radio frame configuration information transmitted by the base station.

  Step 602: According to the radio frame configuration information, the UE determines that at least one of the N consecutive downlink subframes of one radio frame is configured as a first subframe and / or It is determined that at least one of the M consecutive uplink subframes of the radio frame is configured as a second subframe. Here, the first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more.

  Step 603: The UE communicates with the base station by using the radio frame determined according to the radio frame configuration information.

  According to the method provided in the previous embodiment, after the UE receives the downlink data transmitted by the base station in a downlink subframe, the UE may transmit to the base station in a subsequent uplink subframe. , It is necessary to transmit feedback information for downlink data reception. According to the method provided in the present invention, after the UE receives the downlink data transmitted by the base station in the downlink subframe, at least one of the at least two consecutive downlink subframes is the first As configured as a subframe, the UE may download to the base station in the first subframe instead of waiting for a subsequent uplink subframe to transmit feedback information for downlink data reception to the base station. Feedback information of link data reception can be transmitted. Alternatively, after the UE has transmitted uplink data to the base station in the uplink subframe, at least one of the at least two consecutive uplink subframes is configured as a second subframe. Can receive feedback information from the base station in the second subframe instead of waiting until a subsequent downlink subframe to receive feedback information from the base station. In this way, the time interval for waiting for UL / DL switching is reduced, and the system RTT is reduced.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Further, the second subframe further includes at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

One embodiment of the present invention further provides a base station. As shown in FIG. 7, the base station includes:
A determining unit 701 configured to determine radio frame configuration information;
A transmitting unit 702 for transmitting the radio frame configuration information determined by the determination unit 701 to the user equipment UE, wherein the radio frame configuration information includes at least one of N consecutive downlink subframes of one radio frame. And / or radio frame configuration information may be used to instruct the UE to set one as a first subframe and / or the radio frame configuration information may include at least one of M consecutive uplink subframes of one radio frame Used to instruct the UE to configure as two subframes, the first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are A transmission unit 702, which is a positive integer of 2 or more;
A communication unit 703 configured to communicate with the UE by using a radio frame configured according to the radio frame configuration information.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Optionally, the second sub-frame further comprises at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

Optionally, the sending unit 702 is specifically configured as follows:
Transmitting radio frame configuration information to the UE by using a broadcast message for the base station;
The radio frame configuration information is transmitted to the UE by using radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling for the base station.

One embodiment of the present invention provides a user equipment. As shown in FIG. 8, the user equipment includes:
A receiving unit 801 configured to receive radio frame configuration information transmitted by the base station;
A determining unit 802, according to the radio frame configuration information, determines that at least one of the N consecutive downlink subframes of one radio frame is configured as a first subframe, and / or 1 Configured to determine that at least one of the M consecutive uplink subframes of one radio frame is configured as a second subframe, wherein the first subframe is used for uplink service transmission; A second subframe is used for downlink service transmission, where N and M are positive integers greater than or equal to 2;
A communication unit 803 configured to communicate with the base station by using a radio frame determined according to the radio frame configuration information.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Further, the second subframe further includes at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  It should be noted that the unit division in the embodiment of the present invention is an example and is merely a logical function division. In actual implementations, other partitioning methods may exist, or some functions may be ignored or not performed. Further, the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may physically exist alone, or two or more units may be integrated into one unit. The integration unit may be implemented in the form of hardware or in the form of a software functional unit.

  When the integrated unit is implemented in the form of a software functional unit and sold or used as a separate product, the integrated unit may be stored on a computer-readable storage medium. Based on such an understanding, the basic technical solution of the present application, or a part contributing to the prior art, or all or part of the technical solution may be implemented in the form of a software product. The computer software product is stored on a storage medium and causes a computer device (which may be a personal computer, a server, a network device, etc.) or a processor to perform all or some of the steps of the method in the present embodiment. Have a plurality of instructions for instructing The aforementioned storage medium can store program codes such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk. Including any medium.

One embodiment of the present invention further provides a base station. As shown in FIG. 9, the base station includes:
A communication device 901, a processor 902, a bus 903, and a memory 904.

  The communication device 901, the processor 902, and the memory 904 are connected to each other by using a bus 903. Bus 903 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus can be classified into an address bus, a data bus, a control bus, and the like. For convenience of instruction, the bus is represented by using only one thick line in FIG. 9, but this does not indicate that there is only one bus or only one type of bus.

  Memory 904 is configured to store the executable program.

Processor 902 is configured to execute an executable program stored in memory 904 to perform the following:
Determining radio frame configuration information by the processor 902;
Transmitting, by the communicator 901, the radio frame configuration information determined by the processor 902 to the user equipment UE, wherein the radio frame configuration information is one of N consecutive downlink subframes of one radio frame. Is used to instruct the UE to configure at least one as the first subframe and / or the radio frame configuration information is at least one of M consecutive uplink subframes of one radio frame Is used to instruct the UE to configure as a second subframe, the first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M is a positive integer greater than or equal to 2;
Processor 902 is configured to communicate with the UE by using a radio frame configured according to the radio frame configuration information.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Optionally, the second sub-frame further comprises at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

Optionally, communicator 901 is specifically configured as follows:
Transmitting radio frame configuration information to the UE by using a broadcast message for the base station;
For the base station, the radio frame configuration information is transmitted to the UE by using radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling.

One embodiment of the present invention provides a user equipment. As shown in FIG. 10, the user equipment includes:
A communication device 1001, a processor 1002, a bus 1003, and a memory 1004.

  The communication device 1001, the processor 1002, and the memory 1004 are connected to each other by using a bus 1003. Bus 1003 may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus can be classified into an address bus, a data bus, a control bus, and the like. For convenience of instruction, the bus is represented by using only one thick line in FIG. 10, but this does not indicate that there is only one bus or only one type of bus.

  Memory 1004 is configured to store the executable program.

Processor 1002 is configured to execute an executable program stored in memory 1004 to perform the following:
Receiving, by the communicator 1001, radio frame configuration information transmitted by the base station; and, according to the radio frame configuration information received by the communicator 1001, by the processor 1002, N consecutive downlinks of one radio frame. Determining that at least one of the subframes is configured as a first subframe and / or configuring at least one of the M consecutive uplink subframes of one radio frame as a second subframe The first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more. And the radio frame determined according to the radio frame configuration information By using the step of communicating with a base station.

  Optionally, the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol.

Specifically, the first subframe includes C symbols, the first x symbols are guard periods, and the last y symbols are uplink pilot times used for uplink service transmission. Slot, x = C / 2 and y = C / 2. Or
The first subframe includes C symbols, the first x symbols are guard periods, the last y symbols are uplink pilot time slots used for uplink service transmission, and C = X + y and x> C / 2.

  Further, the first subframe further includes at least one second symbol used for downlink service transmission, where the second symbol precedes the guard period.

Specifically, the first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are up symbols. The uplink pilot time slot used for link service transmission, the middle z symbols are guard periods, C = x + y + z, and x ≦ C / 2. Or
The first subframe contains C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. , The middle z symbols are guard periods, C = x + y + z, x <C / 2, and y = C / 2.

  Optionally, the second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are protected. Period, a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, the last b symbols are guard periods, and P = A + b, and a> P / 2.

  Further, the second subframe further includes at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by a guard period.

Specifically, the second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink symbols. The uplink pilot time slot used for link service transmission, w middle symbols are guard periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are for uplink service transmission. , And the middle w symbols are guard periods, P = a + b + w, a <P / 2, and b = P / 2.

  One skilled in the art should understand that embodiments of the present invention may be provided as a method, system, or computer program product. Thus, the present invention may use forms of hardware-only embodiments, software-only embodiments, or embodiments having a combination of software and hardware. Further, the invention is a computer program product implemented on one or more computer-usable storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code. You can use the format

  The invention will be described with reference to flowcharts and / or block diagrams of methods, apparatuses (systems) and computer program products according to embodiments of the invention. It should be understood that the computer program instructions may correspond to each process and / or each block in a flowchart and / or block diagram, and / or a combination of processes and / or blocks in a flowchart and / or block diagram. May be used to implement These computer program instructions may be provided to a general purpose computer, a special purpose computer, a self-contained processor, or a processor of any other programmable data processing device, to generate a machine, and thus, the computer or any other The instructions executed by the processor of the programmable data processing device can be used to create a device that implements one or more processes in the flowcharts and / or one or more blocks in the block diagram. I do.

  These computer program instructions may be stored in a computer readable memory that can instruct a computer or any other programmable data processing device to operate in a particular manner, and therefore the instructions stored in the computer readable memory are Can be produced. The instruction device implements certain functions in one or more processes in the flowcharts and / or in one or more blocks in the block diagrams.

  These computer program instructions may be loaded into a computer or another programmable data processing device, so that a series of operations and steps are executed on the computer or another programmable device, thereby generating a computer-implemented process. I do. Thus, the instructions executed on the computer or another programmable device perform the specific functions in one or more processes in the flowcharts and / or in one or more blocks in the block diagrams. I will provide a.

  Although embodiments of the present invention have been described, those skilled in the art can make changes and modifications to these embodiments once they have learned the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including all alterations and modifications as fall within the scope of the embodiments and the invention.

  Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. The present invention is intended to cover these modifications and variations to the embodiments of the present invention, if they fall within the scope of the claims of the present invention and their equivalents.

Claims (39)

A communication method in a time division duplex system,
Determining, by the base station, radio frame configuration information;
Transmitting, by the base station, the determined radio frame configuration information to the user equipment UE, wherein the radio frame configuration information includes at least one of N consecutive downlink subframes of one radio frame. And / or the radio frame configuration information is used to instruct the UE to set one as a first subframe, and / or the radio frame configuration information comprises at least one of M consecutive uplink subframes of one radio frame Is used to instruct the UE to set as a second subframe, the first subframe is used for uplink service transmission, and the second subframe is used for downlink service transmission , N and M are positive integers of 2 or more;
By the base station, by using a radio frame configured according to the radio frame configuration information, to communicate with the UE,
A method that includes   The method of claim 1, wherein the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol. Method. The first subframe includes C symbols, the first x symbols are the guard period, and the last y symbols are uplink pilot time slots used for uplink service transmission. And x = C / 2 and y = C / 2, or the first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols Is the uplink pilot time slot used for uplink service transmission, where C = x + y and x> C / 2;
The method according to claim 2.   3. The method of claim 2, wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the guard period. The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle z symbols are the guard period, C = x + y + z, and x ≦ C / 2, or the first subframe is C , The first x symbols are downlink pilot timeslots used for downlink service transmission, and the last y symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, the middle z symbols being the guard period, C = x + y + z, x <C / 2, and y = C / 2;
The method according to claim 4.   The second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol. A method according to any one of the preceding claims. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are used in the guard period. And a = P / 2, and b = P / 2, or the second subframe includes P symbols, and the first a symbols are downlink symbols used for downlink service transmission. A link pilot time slot, the last b symbols being the guard period, P = a + b, and a> P / 2,
The method of claim 6.   The method of claim 6, wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, wherein the fourth symbol is preceded by the guard period. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. An uplink pilot time slot used for transmission, w symbols in the middle are the guard periods, P = a + b + w, and a ≦ P / 2, or P second subframes , The first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, w symbols in the middle are the guard periods, and P = a + b + w, a <P / 2, and b = P / 2,
The method according to claim 8. The step of transmitting the radio frame configuration information to a UE by the base station,
Transmitting, by the base station, the radio frame configuration information to the UE by using a broadcast message; or, by the base station, radio resource control RRC dedicated signaling, medium access control MAC signaling, or a physical downlink control channel. Transmitting the radio frame configuration information to the UE by using PDCCH signaling;
The method according to any one of claims 1 to 9, comprising: A communication method in a time division duplex system,
Receiving, by the user equipment UE, the radio frame configuration information transmitted by the base station;
According to the radio frame configuration information, the UE determines that at least one of N consecutive downlink subframes of one radio frame is configured as a first subframe, and / or one radio Determining that at least one of M consecutive uplink subframes of the frame is configured as a second subframe, wherein the first subframe is used for uplink service transmission; The second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more;
By the UE, by using the radio frame determined according to the radio frame configuration information, to communicate with the base station,
A method that includes   The method according to claim 11, wherein the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol. Method. The first subframe includes C symbols, the first x symbols are the guard period, and the last y symbols are uplink pilot time slots used for uplink service transmission. And x = C / 2 and y = C / 2, or the first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols Is the uplink pilot time slot used for uplink service transmission, where C = x + y and x> C / 2;
The method according to claim 12.   The method of claim 12, wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the guard period. The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle z symbols are the guard period, C = x + y + z, and x ≦ C / 2, or the first subframe is C , The first x symbols are downlink pilot timeslots used for downlink service transmission, and the last y symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, the middle z symbols being the guard period, C = x + y + z, x <C / 2, and y = C / 2;
The method according to claim 14.   16. The second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol. A method according to any one of the preceding claims. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are used in the guard period. And a = P / 2, and b = P / 2, or the second subframe includes P symbols, and the first a symbols are downlink symbols used for downlink service transmission. A link pilot time slot, the last b symbols being the guard period, P = a + b, and a> P / 2,
The method according to claim 16.   17. The method of claim 16, wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, wherein the fourth symbol is preceded by the guard period. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. An uplink pilot time slot used for transmission, w symbols in the middle are the guard periods, P = a + b + w, and a ≦ P / 2, or P second subframes , The first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, w symbols in the middle are the guard periods, and P = a + b + w, a <P / 2, and b = P / 2,
The method according to claim 18. A determination unit configured to determine radio frame configuration information;
A transmission unit configured to transmit the radio frame configuration information determined by the determination unit to a user equipment UE, wherein the radio frame configuration information includes N consecutive downlink subframes of one radio frame. And / or the radio frame configuration information is used to instruct the UE to configure at least one of the following as a first subframe: M of the M consecutive uplink subframes of one radio frame. Used to instruct the UE to configure at least one of the UEs as a second subframe, the first subframe is used for uplink service transmission, and the second subframe is used for downlink service transmission. And N and M are positive integers greater than or equal to 2;
A communication unit configured to communicate with the UE by using a radio frame configured according to the radio frame configuration information;
Base stations including.   21. The first subframe of claim 20, wherein the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol. base station. The first subframe includes C symbols, the first x symbols are the guard period, and the last y symbols are uplink pilot time slots used for uplink service transmission. And x = C / 2 and y = C / 2, or the first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols Is the uplink pilot time slot used for uplink service transmission, where C = x + y and x> C / 2;
A base station according to claim 21.   The base station according to claim 21, wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the guard period. The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle z symbols are the guard period, C = x + y + z, and x ≦ C / 2, or the first subframe is C , The first x symbols are downlink pilot timeslots used for downlink service transmission, and the last y symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, the middle z symbols being the guard period, C = x + y + z, x <C / 2, and y = C / 2;
A base station according to claim 23.   25. The second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol. The base station according to any one of claims. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are used in the guard period. And a = P / 2, and b = P / 2, or the second subframe includes P symbols, and the first a symbols are downlink symbols used for downlink service transmission. A link pilot time slot, the last b symbols being the guard period, P = a + b, and a> P / 2,
The base station according to claim 25.   The base station according to claim 25, wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, wherein the fourth symbol is preceded by the guard period. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. An uplink pilot time slot used for transmission, w symbols in the middle are the guard periods, P = a + b + w, and a ≦ P / 2, or P second subframes , The first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, w symbols in the middle are the guard periods, and P = a + b + w, a <P / 2, and b = P / 2,
A base station according to claim 27. The transmission unit is, specifically,
The radio frame configuration information is transmitted to the UE by using a broadcast message for the base station, or radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical down for the base station. Transmitting the radio frame configuration information to the UE by using a link control channel PDCCH signaling;
The base station according to any one of claims 20 to 28, wherein the base station is configured as follows. A receiving unit configured to receive the radio frame configuration information transmitted by the base station;
Determining that at least one of N consecutive downlink subframes of one radio frame is configured as a first subframe according to the radio frame configuration information, and / or M of one radio frame; A determining unit configured to determine that at least one of the consecutive uplink subframes is configured as a second subframe, wherein the first subframe is used for uplink service transmission. , The second subframe is used for downlink service transmission, and N and M are positive integers of 2 or more;
By using a radio frame determined according to the radio frame configuration information, a communication unit configured to communicate with the base station,
User equipment UE including:   31. The first subframe of claim 30, wherein the first subframe includes a guard period and at least one first symbol used for uplink service transmission, wherein the guard period precedes the first symbol. User equipment. The first subframe includes C symbols, the first x symbols are the guard period, and the last y symbols are uplink pilot time slots used for uplink service transmission. And x = C / 2 and y = C / 2, or the first subframe includes C symbols, the first x symbols are the guard periods, and the last y symbols Is the uplink pilot time slot used for uplink service transmission, where C = x + y and x> C / 2;
32. The user equipment according to claim 31.   The user equipment according to claim 31, wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the guard period. The first subframe includes C symbols, the first x symbols are downlink pilot time slots used for downlink service transmission, and the last y symbols are uplink service timeslots. The uplink pilot time slot used for transmission, the middle z symbols are the guard periods, C = x + y + z, and x ≦ C / 2, or the first subframe is C , The first x symbols are downlink pilot timeslots used for downlink service transmission, and the last y symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, the middle z symbols being the guard period, C = x + y + z, x <C / 2, and y = C / 2;
The user equipment according to claim 33.   35. The second subframe includes a guard period and at least one third symbol used for downlink service transmission, wherein the guard period is preceded by the third symbol. User equipment according to any one of the preceding claims. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are used in the protection period. And a = P / 2, and b = P / 2, or the second subframe includes P symbols, and the first a symbols are downlink symbols used for downlink service transmission. A link pilot time slot, the last b symbols being the guard period, P = a + b, and a> P / 2,
The user equipment according to claim 35.   The user equipment according to claim 35, wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, wherein the fourth symbol is preceded by the guard period. The second subframe includes P symbols, the first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink service timeslots. An uplink pilot time slot used for transmission, w symbols in the middle are the guard periods, P = a + b + w, and a ≦ P / 2, or P second subframes , The first a symbols are downlink pilot time slots used for downlink service transmission, and the last b symbols are uplink pilot timeslots used for uplink service transmission. A link pilot time slot, w symbols in the middle are the guard periods, and P = a + b + w, a <P / 2, and b = P / 2,
A user device according to claim 37.   20. A computer storage medium, wherein the computer storage medium can store a program, and when the program is executed, includes some or all steps of the method according to any one of claims 1 to 19. Obtain a computer storage medium.

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