JP6818829B2 - Communication methods, base stations, and user equipment in time division duplex systems - Google Patents

Description

The present invention relates to the field of communication technology, particularly to communication methods, base stations, and user equipment in time division duplex systems.

Long Term Evolution (LTE for short) systems support Time Division Duplex (TDD for short) schemes. That is, the uplink (Uplink, abbreviated as UL) and the downlink (Downlink, abbreviated as DL) use different time slots of the same carrier wave. Uplinks are used for uplink communication. That is, when the user equipment (User Equipment, abbreviated as UE) 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 wireless communication systems, and generally, the transmitting end gives an acknowledgment from the receiving end from the time when the transmitting end transmits data. It means the period until the reception time.

In a TDD system, data scheduling is generally performed by a hybrid automatic repeat request (HARQ) method. After transmitting data during one HARQ process, the transmitting end does not transmit the next data packet until a preset maximum feedback latency has elapsed. Therefore, if the ACK can be received as soon as possible, the time interval in which the data packet is transmitted in one HARQ process can be shortened, the RTT can be shortened, and the data transmission efficiency can be improved.

Currently, there is still no way to efficiently reduce the RTT of TDD communication systems and improve data transmission efficiency.

Embodiments of the present invention provide communication methods, base stations, and user equipment in a time division duplex system in order to efficiently reduce RTT and improve data transmission efficiency.

According to the first aspect, one embodiment of the present invention is a communication method in a time division duplex system, wherein the method is:
Steps to determine wireless frame configuration information by the base station,
The step of transmitting the determined radio frame configuration information to the user equipment UE by the base station, wherein the radio frame configuration information is at least one of N consecutive downlink subframes of one radio frame. Used to instruct the UE to set one as the first subframe and / or the radio frame configuration information is at least one of M contiguous 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 greater than or equal to 2, step and
A step of communicating with the UE by using a radio frame configured by the base station according to the radio frame configuration information.
Provide a method including.

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

With reference to the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the first subframe comprises C symbols and the first x symbols are said. The protection 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. The subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for uplink service transmission, and C. = X + y and x> C / 2.

With reference to the first possible implementation of the first aspect, in the third possible implementation of the first aspect, the first subframe is at least one first subframe used for downlink service transmission. It further comprises two symbols, the second symbol preceding the protection period.

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

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

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

With reference to the fifth possible implementation of the first aspect, in the seventh possible implementation of the first aspect, the second subframe is at least one first used for uplink service transmission. It further comprises 4 symbols, the 4th symbol being preceded by the protection period.

With reference to the seventh possible implementation of the first aspect, in the eighth possible implementation of the first aspect, the second subframe contains P symbols and the first a symbols are down. The downlink pilot time slot used for link service transmission, the last b symbols are the uplink pilot time slots used for uplink service transmission, and the middle w symbols are the above. It is a protection period, P = a + b + w, and a≤P / 2, or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for the downlink service transmission, and the last b symbols are the uplink service transmission. The uplink pilot time slot used for this purpose, the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

With reference to any one of the first to eighth possible implementations of the first aspect and the first aspect, in the ninth possible implementation of the first aspect, the base station causes the UE. The step of transmitting the wireless frame configuration information to
A step of transmitting the radio frame configuration information to the UE by using a broadcast message by the base station, or a radio resource control RRC dedicated signaling, a media access control MAC signaling, or a physical downlink control channel by the base station. A step of transmitting the radio frame configuration information to the UE by using PDCCH signaling.
including.

According to the second aspect, the embodiment of the present invention is a communication method in a time division duplex system.
The step of receiving the wireless frame configuration information transmitted by the base station by the user equipment UE, and
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 the first subframe and / or one radio. A step that determines that at least one of M consecutive uplink subframes of a 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 greater than or equal to 2.
A step of communicating with the base station by using the radio frame determined by the UE according to the radio frame configuration information.
Provide a method including.

With reference to the second aspect, in the first possible implementation of the second 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.

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

With reference to the first possible implementation of the second aspect, in the third possible implementation of the second aspect, the first subframe is at least one first subframe used for downlink service transmission. It further comprises two symbols, the second symbol preceding the protection period.

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

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

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

With reference to the fifth possible implementation of the second aspect, in the seventh possible implementation of the second aspect, the second subframe is at least one first used for uplink service transmission. It further comprises 4 symbols, the 4th symbol being preceded by the protection period.

With reference to the seventh possible implementation of the second aspect, in the eighth possible implementation of the second aspect, the second subframe contains P symbols and the first a symbols are down. The downlink pilot time slot used for link service transmission, the last b symbols are the uplink pilot time slots used for uplink service transmission, and the middle w symbols are the above. It is a protection period, P = a + b + w, and a≤P / 2, or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for the downlink service transmission, and the last b symbols are the uplink service transmission. The uplink pilot time slot used for this purpose, the w symbols in the middle are the protection 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 decision unit configured to determine wireless frame configuration information,
A transmission unit that transmits the radio frame configuration information determined by the determination unit to the user equipment UE, wherein the radio frame configuration information is at least one of N consecutive downlink subframes of one radio frame. Used to instruct the UE to set one as the first subframe and / or the radio frame configuration information is at least one of M contiguous 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 greater than or equal to 2;
A communication unit configured to communicate with the UE by using a wireless frame configured according to the wireless frame configuration information.
Further provide base stations including.

With reference to the third aspect, in the first possible implementation of the third aspect, the first subframe is the protection period and at least one first symbol used for uplink service transmission. The protection period precedes the first symbol.

With reference to the first possible implementation of the third aspect, in the second possible implementation of the third aspect, the first subframe comprises C symbols and the first x symbols are said. The protection 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 contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot time slots used to transmit the uplink service. , C = x + y and x> C / 2.

With reference to the first possible implementation of the third aspect, in the third possible implementation of the third aspect, the first subframe is at least one first subframe used for downlink service transmission. It further comprises two symbols, the second symbol preceding the protection period.

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

With reference to any one of the first to fourth possible implementations of the third aspect, or the third aspect, in the 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, the protection period being preceded by the third symbol.

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

With reference to the fifth possible implementation of the third aspect, in the seventh possible implementation of the third aspect, the second subframe is at least one first used for uplink service transmission. It further comprises 4 symbols, the 4th symbol being preceded by the protection period.

With reference to the seventh possible implementation of the third aspect, in the eighth possible implementation of the third aspect, the second subframe contains P symbols and the first a symbols are down. The downlink pilot time slot used for link service transmission, the last b symbols are the uplink pilot time slots used for uplink service transmission, and the middle w symbols are the above. It is a protection period, P = a + b + w, and a≤P / 2, or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for the downlink service transmission, and the last b symbols are the uplink service transmission. The uplink pilot time slot used for this purpose, the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

With reference to any one of the first to eighth possible implementations of the third aspect, the third aspect, in the ninth possible implementation of the third aspect, the transmission unit is specific. In the end
The radio frame configuration information is transmitted to the UE by using a broadcast message for the base station.
It is configured to transmit 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 for the base station.

According to a fourth aspect, one embodiment of the present invention is a user device.
A receiving unit configured to receive radio frame configuration information transmitted by a base station,
The determination unit determines that at least one of the N consecutive downlink subframes of one radio frame is configured as the first subframe according to the radio frame configuration information and / or 1 At least one of the M contiguous uplink subframes of one radio frame is configured to determine to be configured as a second subframe, the first subframe being 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.
A communication unit configured to communicate with the base station by using a radio frame determined according to the radio frame configuration information.
Further provide user equipment including.

With reference to the fourth aspect, in the 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.

With reference to the first possible implementation of the fourth aspect, in the second possible implementation of the fourth aspect, the first subframe comprises C symbols and the first x symbols are said. The protection 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 contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot time slots used to transmit the uplink service. , C = x + y and x> C / 2.

With reference to the first possible implementation of the fourth aspect, in the third possible implementation of the fourth aspect, the first subframe is at least one first subframe used for downlink service transmission. It further comprises two symbols, the second symbol preceding the protection period.

, With reference to the third possible implementation of the fourth aspect, in the fourth possible implementation of the fourth aspect, the first subframe contains C symbols and the first x symbols The downlink pilot time slot used for downlink service transmission, the last y symbols are the 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 contains C symbols, the first x symbols are the downlink pilot time slots used for the downlink service transmission, and the last y symbols are the uplink service transmission. The uplink pilot time slot used for this, the z symbols in the middle are the protection periods, C = x + y + z, x <C / 2, and y = C / 2.

With reference to any one of the first to fourth possible implementations of the fourth aspect, or the fourth aspect, in the 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, the protection period being preceded by the third symbol.

With reference to the fifth possible implementation of the fourth aspect, in the sixth possible implementation of the fourth aspect, the second subframe contains P symbols and the first a symbols are down. The downlink pilot time slot used for link service transmission, the last b symbols are the protection period, a = P / 2 and b = P / 2, or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are the protection period. , P = a + b, and a> P / 2.

With reference to the fifth possible implementation of the fourth aspect, in the seventh possible implementation of the fourth aspect, the second subframe is at least one first used for uplink service transmission. It further comprises 4 symbols, the 4th symbol being preceded by the protection period.

With reference to the seventh possible implementation of the fourth aspect, in the eighth possible implementation of the fourth aspect, the second subframe contains P symbols and the first a symbols are down. The downlink pilot time slot used for link service transmission, the last b symbols are the uplink pilot time slots used for uplink service transmission, and the middle w symbols are the above. It is a protection period, P = a + b + w, and a≤P / 2, or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for the downlink service transmission, and the last b symbols are the uplink service transmission. The uplink pilot time slot used for this purpose, the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

According to an embodiment of the present invention, in a TDD system, the radio frame period remains constant and at least one of two or more contiguous downlink subframes of one radio frame is configured as a first subframe. , And / or at least one of two or more contiguous uplink subframes of one radio frame is configured as a second subframe, the first subframe being 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 shortens the time interval for waiting for UL / DL switching in some subframes, thereby shortening the system RTT. For example, after the UE receives the downlink data transmitted by the base station in the downlink subframe, the UE sends the feedback information of the downlink data reception to the base station in the subsequent uplink subframe. Need to send. According to the method provided in the present invention, at least one of at least two consecutive downlink subframes is the first after the UE receives the downlink data transmitted by the base station in the downlink subframe. Since it is configured as a subframe, the UE goes down to the base station in the first subframe instead of waiting for subsequent uplink subframes to send feedback information for receiving downlink data to the base station. You can send feedback information for receiving link data. Therefore, the time interval for waiting for UL / DL switching is shortened, thereby shortening the system RTT.

It is a schematic structural drawing of the TDD subframe by one Embodiment of this invention. It is a flowchart of the communication method in the time division duplex system according to one Embodiment of this invention. It is a schematic structural drawing of the 1st subframe by one Embodiment of this invention. It is a schematic structure diagram of another TDD subframe according to one Embodiment of this invention. It is a schematic structural drawing of yet another TDD subframe according to one Embodiment of this invention. It is a flowchart of another communication method in the time division duplex system according to one Embodiment of this invention. It is a schematic structural drawing of the base station by one Embodiment of this invention. It is a schematic structural drawing of the user equipment by one Embodiment of this invention. It is a schematic structural drawing of another base station by one Embodiment of this invention. It is a schematic structural drawing of another user equipment by one Embodiment of this invention.

In order to further clarify the objectives, technical solutions and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are merely a portion of the embodiments of the present invention, not all embodiments. All other embodiments obtained by one of ordinary skill in the art based on the embodiments of the present invention without creative effort are included in the scope of protection of the present invention.

Embodiments of the present invention provide communication methods, base stations, and user equipment in a time division duplex system in order to efficiently reduce RTT and improve data transmission efficiency. The methods and devices are based on the same invention. Since similar principles are used by methods and devices to solve problems, device and method practices are referred to each other and repetitions are omitted herein.

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

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

Table 1 is a TDD configuration table of an existing TDD LTE system. As shown in Table 1, in the existing TDD LTE system, there are a total of 7 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", "" The meanings of "D" and "U" are the same as the definitions here, and the explanation is not repeated). In Table 1, the downlink-uplink switch-point period of TDD configurations 0, 1, 2, and 6 is 5 ms, and the downlink-uplinks of TDD configurations 3 to 5 are The switching point period is 10 ms. FIG. 1 is a structural diagram of an existing subframe.
[Table 1]

Hereinafter, embodiments of the present invention will be specifically described 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 comprises the following steps.

Step 201: The base station determines the 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 the UE to set at least one of the N consecutive downlink subframes of one radio frame as the first subframe, and / or the 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 the 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 greater than or equal to 2.

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 above embodiment, after the base station sends downlink data to the UE in the downlink subframe, the UE receives the downlink data and then in the subsequent uplink subframe. Therefore, it is necessary to send the feedback information for receiving the downlink data to the base station. According to the method provided in the present invention, at least one of at least two consecutive downlink subframes is the first after the UE receives the downlink data transmitted by the base station in the downlink subframe. Since it is configured as a subframe, the UE goes down to the base station in the first subframe instead of waiting for subsequent uplink subframes to send feedback information for receiving downlink data to the base station. You can send feedback information for receiving link data. Alternatively, after the UE transmits uplink data to the base station within the uplink subframe, at least one of at least two consecutive uplink subframes according to the method provided in this embodiment of the invention. One is configured as a second subframe, and the base station can transmit feedback information to the UE in the second subframe instead of waiting until the downlink subframe to transmit the feedback information to the UE. In this way, the time interval for waiting for UL / DL switching is shortened, and the system RTT is shortened.

Optionally, the base station may transmit the determined radio frame configuration information to the UE, specifically by the following method.

The base station uses broadcast messages to transmit radio frame configuration information to the UE. Or
The base station transmits 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 comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

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

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where 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 to transmit the Physical Downlink Control Channel (PDCCH for short). , Physical Downlink Shared Channel (PDSCH for short) may be further used to transmit. The first symbol used for uplink service transmission may be used to transmit a Sounding Reference Signal (SRS) or Physical Random Access Channel (PRACH for short) signal. .. The protection period is a downlink service to prevent the channel from causing uplink interference to another remote station, to determine the coverage area, and to further ensure that the terminal signal arrives synchronously with the base station. Used to separate the symbol used for uplink service transmission from the symbol used for transmission.

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

For example, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for the downlink service transmission, and the last y symbols are the uplink service transmission. The uplink pilot time slot used for, the z symbols in the middle are the protection 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 using a TTI smaller than 1 ms (eg 0.5 ms) will first find if the second UE detects the 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 protection period and at least one third symbol used for downlink service transmission, the protection period being preceded by the third symbol.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

In addition, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

Within the second subframe, the third symbol used for downlink service transmission may be specifically used to transmit a PDCCH signal and is further used to transmit a PDSCH signal. Good. The fourth symbol used for uplink service transmission may be used to transmit an SRS or PRACH signal. The protection period is a downlink service to prevent the channel from causing uplink interference to another remote station, to determine the coverage area, and to further ensure that the terminal signal arrives synchronously with the base station. Used to separate the symbol used for uplink service transmission from the symbol used for transmission.

A base station may further transmit radio frame configuration information, radio frame duration, determined TTI, and other information to another base station, which may allow each base station to communicate with a terminal. Allows you to determine the position of the subframe used. This can avoid transmission interference between base stations.

When 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 the first subframe: Is given an explanation.

(1) In the TDD system, the radio frame period is invariant, the period of each subframe is also invariant, and one subframe contains 14 symbols. TTI is equal to the subframe period. In the 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 shortens the time interval for waiting for UL / DL switching in some subframes, thereby shortening the system RTT. In Table 2, "X" represents the first subframe.
[Table 2]

The first subframe is configured in the following manner, but not as limited, as shown in FIG. 3 (the figure is merely an example and does not impose any special limitation on the solutions provided in the embodiments of the present invention). May be done.

Method 1: The first 7 symbols in the first subframe are the protection period and the last 7 symbols are the uplink pilot time slots used for the uplink service transmission.

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

Method 3: The first x symbols in the first subframe are the downlink pilot time slots used for the downlink service transmission, and the last y symbols are used for the uplink service transmission. It is an uplink pilot time slot to be performed, and the z symbols in the middle are protection periods, 14 = x + y + z, and x ≦ 7.

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

Optionally, with the above configuration, the radio frame period remains unchanged and remains at 10 ms, the subframe period is shortened to 1 / n of the original subframe period, n> 1, n Is a positive integer. The subframe may be evenly divided into n parts, and the use of symbols occupying each part is invariant. 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 Method 1 above, where the first subframe is constructed, the first 7 symbols are the period of 1 subframe and are used together as the protection period, and the last 7 symbols are the uplink pilot. It is a time slot and 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 invariant and may still be 10 ms and the subframe period may be invariant. The transmission time interval TTI is shortened. For example, the shortened TTI is 0.5 ms. For example, for the first subframe constructed in method 4, the first few symbols in the current TTI are used for downlink service transmission and the next TTI is for uplink service transmission. Used as the uplink subframe of.

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

The configured first subframe comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the configured first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

In the present invention, the subframes are numbered by the same numbering method as in existing TDD systems. That is, within one radio frame, the subframes are numbered from 0. 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 a plurality of TDD configuration methods. The following describes one of the TDD configuration methods by using an example. Since 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]

It should be noted that in 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 described. Is not repeated unless there are special cases.

Compared to the TDD configuration of the existing TDD LTE system in 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 a practical implementation, the duration of the S subframes in Table 3 may vary depending on the different coverage scenarios considered. For example, in a small coverage scenario (ie, the cell coverage radius is not greater than the preset coverage radius threshold), only subframe 2 may be set as the S subframe and subframe 3 may be set as the uplink subframe. It's okay. In the 10 ms radio frame, the subframe 2 and the subframe 12 are S subframes, and the subframes 3 and 13 are changed to uplink subframes. Large coverage scenarios (ie, the cell coverage radius is greater than the preset coverage radius threshold) require a relatively large GP length, so multiple consecutive subframes may need to be occupied as S subframes. .. For example, the configuration methods in Table 3 may be used and two consecutive subframes are occupied as S subframes.

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

See, for example, Table 4.
[Table 4]

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

For example, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for the downlink service transmission, and the last y symbols are the uplink service transmission. The uplink pilot time slot used for, the z symbols in the middle are the protection 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 following TTIs are used for uplink service transmissions, such as UL data transmissions 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: Send UL scheduling information within the DL subframe (subframe period is 0.5 ms here) n, and the information includes UL authorization information. The transmission time is assumed to be TTI n.

Step 2: After receiving the UL permission, the UE transmits 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 value setting 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 the 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: When the eNB feeds back NACK in the subframe n + k + k1, the UE performs retransmission in the subframe n + k + k1 + k.

DL HARQ time series

The time series for transmitting DL data is as follows.

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

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

When the radio frame configuration information is used to instruct the UE to set at least one of the M contiguous 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 invariant, the period of each subframe is also invariant, and one subframe contains 14 symbols. TTI is equal to the subframe period. In a wireless 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, for example, equal to 1 ms, equal to the TTI tuning subframe period, and a group of DL switching points is added to each radio frame. This shortens the time interval for waiting for UL / DL switching in some subframes, thereby shortening the system RTT. In Table 8, "E" represents the second subframe.
[Table 8]

Optionally, the second subframe is, but is not limited to, as shown in FIG. 5 (the figure is merely an example and does not impose any special limitation on the solutions provided in the embodiments of the present invention): It may be configured by the method of.

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

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

(3) The second subframe contains P symbols, the first a symbol is the downlink pilot time slot, the last b symbol is the protection period, a = P / 2, and b. = P / 2.

(4) The second subframe contains P symbols, the first a symbol is the downlink pilot time slot, the last b symbol is the protection period, P = a + b, and a> P. It is / 2.

Here, P = 14.

Optionally, with the above configuration, the radio frame period remains unchanged and remains at 10 ms, the subframe period is shortened to 1 / n of the original subframe period, n> 1, n Is a positive integer. The subframe may be evenly divided into n parts, and the use of symbols occupying each part is invariant. 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 in which the second subframe is constructed, the first seven symbols are the downlink pilot time slots, used as one possible subframe as the downlink subframe, and last. The seven symbols of are a period of one subframe and are used together as a protection period. Another method is shown in FIG.

Optionally, the radio frame period is invariant and may still be 10 ms and the subframe period may be invariant. The transmission time interval TTI is shortened. For example, the shortened TTI is 0.5 ms. For example, for the second subframe constructed in the second way, the first few symbols in the current TTI are used for downlink service transmission and the next TTI is the uplink subframe. Can be thought of as and used for uplink service transmissions.

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

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

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

In addition, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

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

When n = 2, there may be a plurality of TDD configuration methods. The following describes one of the TDD configuration methods by using an example. Since 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 in 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 a practical implementation, the duration of the S subframes in Table 3 may vary depending on the different coverage scenarios considered. For example, in a small coverage scenario (ie, the cell coverage radius is not greater than the preset coverage radius threshold), only subframe 2 may be set as the S subframe and subframe 3 may be set as the uplink subframe. It's okay. In the 10 ms radio frame, the subframe 2 and the subframe 12 are S subframes, and the subframes 3 and 13 are changed to uplink subframes.

Large coverage scenarios (ie, the cell coverage radius is greater than the preset coverage radius threshold) require a relatively large GP length, so multiple consecutive subframes may need to be occupied as S subframes. .. For example, the configuration methods in Table 3 may be used and two consecutive subframes are occupied as S subframes.

Based on this, at least one of 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 shortens the time interval for waiting for UL / DL switching in some subframes, thereby shortening the system RTT.

See, for example, Table 9.
[Table 9]

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

Method 1: The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are the protection period. Yes, a = P / 2 and b = P / 2.

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

Method 2: The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are the protection period. Yes, P = a + b, and a> P / 2.

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

Method 3: The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used to transmit the downlink service, and the last b symbols are the uplink service. The uplink pilot time slot used for transmission, the middle w symbols are the protection period, P = a + b + w, and a≤P / 2.

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

Method 4: The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used to transmit the downlink service, and the last b symbols are the uplink service. The uplink pilot time slot used for transmission, the middle w symbols are the protection period, P = a + b + w, a <P / 2, and b = P / 2.

Specifically, the PDCCH symbol that occupies some symbols exists in the current TTI (0.5 ms) and is used to transmit UL permissions, and the GP that occupies some symbols The next TTI (0.5 ms) time slot, which exists in the middle, 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 greater than the preset coverage radius threshold, the dedicated subframe may be configured by method 1. When the cell coverage radius is smaller than the 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 a radio frame configured according to the radio frame configuration information, specifically by using the uplink pilot time slot in the second subframe. It may be to receive the uplink control information and / or the uplink data transmitted by. 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 the timeline of the HARQ process to perform data transmission with the UE and to perform data transmission with the UE within the time series of the determined 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: Send UL scheduling information within the DL subframe (subframe period is 0.5 ms here) n, and the information includes UL authorization information. The transmission time is assumed to be TTI n.

Step 2: After receiving the UL permission, the UE transmits 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 value 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 the 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: When the eNB feeds back NACK in the subframe n + k + k1, the UE performs retransmission in the 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: The eNB transmits DL data to the UE in the subframe n. Here, the subframe n is a DL subframe.

Step 2: The UE transmits UL feedback to the eNB in the subframe n + k2. Here, k2 is 4 subframes or more, and n + k2 is a UL subframe. The value of k2 is shown in Table 12 (the value setting of k2 is described by using the subframe configuration in Table 9 as an example).
[Table 12]

Based on the same invention idea 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 content as that of the embodiment shown in FIG. 2 is 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 the first subframe and / or one. It is determined that at least one of the M consecutive uplink subframes of the radio frame is configured as the 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 aforementioned embodiment, after the UE receives the downlink data transmitted by the base station in the downlink subframe, the UE goes to the base station in the subsequent uplink subframe. , It is necessary to send feedback information for receiving downlink data. According to the method provided in the present invention, at least one of at least two consecutive downlink subframes is the first after the UE receives the downlink data transmitted by the base station in the downlink subframe. Since it is configured as a subframe, the UE goes down to the base station in the first subframe instead of waiting for subsequent uplink subframes to send feedback information for receiving downlink data to the base station. You can send feedback information for receiving link data. Alternatively, after the UE sends uplink data to the base station within the uplink subframe, at least one of at least two consecutive uplink subframes is configured as the second subframe, so that the UE Can receive feedback information from the base station in the second subframe instead of waiting for subsequent downlink subframes to receive feedback information from the base station. In this way, the time interval for waiting for UL / DL switching is shortened, and the system RTT is shortened.

Optionally, the first subframe comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

In addition, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection 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:
Decision unit 701, configured to determine wireless frame configuration information,
A transmission unit 702 that transmits the radio frame configuration information determined by the determination unit 701 to the user equipment UE, wherein the radio frame configuration information is at least one of N consecutive downlink subframes of one radio frame. Used to instruct the UE to set one as the first subframe, and / or the radio frame configuration information is the first of M contiguous uplink subframes of one radio frame. Used to instruct the UE to set 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 Transmission unit 702, which is a positive integer greater than or equal to 2.
A communication unit 703 configured to communicate with a UE by using a radio frame configured according to radio frame configuration information.

Optionally, the first subframe comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

Optionally, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

Optionally, the transmit unit 702 is specifically configured as follows:
Sending radio frame configuration information to the UE by using broadcast messages for the base station
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 device. As shown in FIG. 8, the user equipment includes:
Receiving unit 801 configured to receive radio frame configuration information transmitted by the base station,
The determination unit 802 determines and / or 1 that at least one of the N consecutive downlink subframes of one radio frame is configured as the first subframe according to the radio frame configuration information. At least one of the M contiguous uplink subframes of one radio frame is configured to determine to be configured as a second subframe, the first subframe being used for uplink service transmission. The second subframe is used for downlink service transmission, where N and M are positive integers greater than or equal to 2, decision unit 802,
A communication unit 803 configured to communicate with a base station by using a radio frame determined according to the radio frame configuration information.

Optionally, the first subframe comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

In addition, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection 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 functional division. In the actual implementation, another partitioning method may exist, or some features may or may not be ignored. Further, the functional units according to the embodiment of the present application may be integrated into one processing unit, each unit may exist physically independently, 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 software functional units.

When the integrated unit is implemented in the form of a software functional unit and sold or used as a stand-alone product, the integrated unit may be stored on a computer-readable storage medium. Based on this understanding, the basic technical solutions of the present application, or parts, or all or part of the technical solutions that contribute to the prior art, may be implemented in the form of software products. The computer software product is stored on a storage medium and performs all or part of the steps of the method in the embodiments of the present application on a computer device (which may be a personal computer, server, network device, etc.) or processor. Has multiple instructions to instruct. The storage medium described above can store program code such as a USB flash drive, removable hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk. Includes any medium.

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

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

The memory 904 is configured to store an executable program.

Processor 902 is configured to execute an executable program stored in memory 904 to do the following:
Steps of determining radio frame configuration information by processor 902,
The step of transmitting the radio frame configuration information determined by the processor 902 to the user equipment UE by the communication device 901, wherein the radio frame configuration information is among N consecutive downlink subframes of one radio frame. Used to instruct the UE to set at least one as the first subframe, and / or the radio frame configuration information is at least one of M contiguous uplink subframes of one radio frame. Is used to instruct the UE to set as the second subframe, the first subframe is used for uplink service transmission, the second subframe is used for downlink service transmission, N and M is a positive integer greater than or equal to 2, step,
The 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 comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

Optionally, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

Optionally, the communicator 901 is specifically configured as follows:
Sending radio frame configuration information to the UE by using broadcast messages for the base station
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 device. As shown in FIG. 10, the user equipment includes:
Communication device 1001, processor 1002, bus 1003, and memory 1004.

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

Memory 1004 is configured to store an executable program.

Processor 1002 is configured to execute an executable program stored in memory 1004 to do the following:
The step of receiving the radio frame configuration information transmitted by the base station by the communication device 1001 and the N consecutive downlinks of one wireless frame by the processor 1002 according to the radio frame configuration information received by the communication device 1001. It is determined that at least one of the subframes is configured as the first subframe and / or at least one of the M contiguous uplink subframes of one radio frame is configured as the 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 greater than or equal to 2 in the step of determining to be done. The step of communicating with the base station by using the step and the radio frame determined according to the radio frame configuration information.

Optionally, the first subframe comprises a protection period and at least one first symbol used for uplink service transmission, the protection period preceding the first symbol.

Specifically, the first subframe contains C symbols, the first x symbols are the protection period, and the last y symbols are the uplink pilot times used to transmit the uplink service. It is a slot, and x = C / 2 and y = C / 2. Or
The first subframe contains C symbols, the first x symbols are the protection period, the last y symbols are the uplink pilot time slots used for the uplink service transmission, and the C = X + y and x> C / 2.

In addition, the first subframe further comprises at least one second symbol used for downlink service transmission, which precedes the protection period.

Specifically, the first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are up. It is an uplink pilot time slot used for link service transmission, and the z symbols in the middle are protection periods, C = x + y + z, and x≤C / 2. Or
The first subframe contains C symbols, the first x symbols are the downlink pilot time slots used for downlink service transmission, and the last y symbols are for uplink service transmission. The uplink pilot time slot used for, and the z symbols in the middle are the protection periods, where C = x + y + z, x <C / 2, and y = C / 2.

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

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are protected. It is a period, and a = P / 2 and b = P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, the last b symbols are the protection period, and P = A + b and a> P / 2.

In addition, the second subframe further comprises at least one fourth symbol used for uplink service transmission, which is preceded by a protection period.

Specifically, the second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are up. It is an uplink pilot time slot used for link service transmission, and the w symbols in the middle are protection periods, P = a + b + w, and a ≦ P / 2. Or
The second subframe contains P symbols, the first a symbol is the downlink pilot time slot used for downlink service transmission, and the last b symbols are for uplink service transmission. The uplink pilot time slot used for, and the w symbols in the middle are the protection periods, P = a + b + w, a <P / 2, and b = P / 2.

Those skilled in the art should understand that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may use the form of a hardware-only embodiment, a software-only embodiment, or an embodiment having a combination of software and hardware. Furthermore, the present invention is a computer program product implemented on one or more computer-enabled storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-enabled program code. You may use the format of.

The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that computer program instructions are 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 carry out. These computer program instructions may be provided to a general purpose computer, a dedicated computer, an internal processor, or the processor of any other programmable data processor to generate the machine, and thus the computer or any other programmable data processor. Instructions executed by the processor of a programmable data processor can generate a device that implements one or more processes in a flowchart and / or a particular function in one or more blocks in a block diagram. To do.

These computer program instructions may be stored in computer-readable memory that can instruct the computer or any other programmable data processing device to operate in a particular way, and therefore the instructions stored in computer-readable memory are instruction devices. Can produce products containing. The command device implements a particular function in one or more processes in the flowchart and / or in one or more blocks in the block diagram.

These computer program instructions may be loaded into a computer or another programmable data processor, thus producing a series of operations and steps performed on that computer or another programmable device, thereby producing the processing performed by the computer. To do. Thus, an instruction executed on a computer or another programmable device performs a particular function in one or more processes in a flowchart and / or in one or more blocks in a block diagram. I will provide a.

Although embodiments of the present invention have been described, those skilled in the art can make changes and changes to these embodiments by learning the basic concepts of the invention. Therefore, the appended claims should be construed as including all changes and modifications within the scope of the embodiment and the invention.

Obviously, one of ordinary skill in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. The present invention is intended to include these modifications and modifications to embodiments of the present invention where these modifications and modifications are included in the claims of the invention and their equivalent techniques.

Claims (20)

It is a communication method in a time division duplex system.
The step of determining the radio frame configuration information by the base station is that the radio frame configuration information is:
Each of the original uplink subframe of one radio frame configured as two uplink subframes continuous, each of the uplink sub-frame for the continuous size of half the original uplink subframe Yes you can,
Each of the original downlink subframe of one radio frame configured as two downlink subframes continuous, each of the downlink subframes the continuous size of half the original downlink subframe Yes you can,
Each of the original dedicated subframe of one radio frame configured as two dedicated sub-frames consecutive, each of the dedicated sub-frames the continuous will have a magnitude of half of the original dedicated sub-frame that,
Is used to indicate at least one of,
The wireless frame configuration information is:
At least one of a plurality of consecutive downlink subframes of one radio frame is configured as a first subframe, and the first subframe is used for uplink service transmission and / or.
At least one of a plurality of consecutive uplink subframes of one radio frame is configured as a second subframe, and the second subframe is used for downlink service transmission.
Further Ru is used to indicate the steps,
A step of transmitting the wireless frame configuration information to the user equipment UE by the base station,
A step of communicating with the UE by using a radio frame configured by the base station according to the radio frame configuration information.
How to include. The first sub-frame, a protection period, wherein the at least one first symbol is used for uplink service transmission, the protection period preceding the first symbol of claim 1 Method. The step of transmitting the radio frame configuration information to the UE by the base station is
A step of transmitting the radio frame configuration information to the UE by using a broadcast message by the base station, or a radio resource control RRC dedicated signaling, a media access control MAC signaling, or a physical downlink control channel by the base station. A step of transmitting the radio frame configuration information to the UE by using PDCCH signaling.
The method according to claim 1 or 2 , wherein the method comprises. It is a communication method in a time division duplex system.
The step of receiving the wireless frame configuration information transmitted by the base station by the user equipment UE, the wireless frame configuration information is
Each of the original uplink subframe of one radio frame configured as two uplink subframes continuous, each of the uplink sub-frame for the continuous size of half the original uplink subframe Yes you can,
Each of the original downlink subframe of one radio frame configured as two downlink subframes continuous, each of the downlink subframes the continuous size of half the original downlink subframe Yes you can,
Each of the original dedicated subframe of one radio frame configured as two dedicated sub-frames consecutive, each of the dedicated sub-frames the continuous will have a magnitude of half of the original dedicated sub-frame that,
Is used to indicate at least one of,
The wireless frame configuration information is:
At least one of a plurality of consecutive downlink subframes of one radio frame is configured as a first subframe, and the first subframe is used for uplink service transmission and / or.
At least one of a plurality of consecutive uplink subframes of one radio frame is configured as a second subframe, and the second subframe is used for downlink service transmission.
Further Ru is used to indicate the steps,
A step of communicating with the base station by using the radio frame determined by the UE according to the radio frame configuration information.
How to include. The first sub-frame, a protection period, wherein the at least one first symbol is used for uplink service transmission, the protection period preceding the first symbol of claim 4 Method. The step of receiving the radio frame configuration information transmitted by the base station by the UE is
A step of receiving the radio frame configuration information transmitted by the base station by the UE or a broadcast message, or
A step of receiving the radio frame configuration information transmitted by the base station by the UE by radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling.
4. The method of claim 4 or 5 . A determination unit configured to determine radio frame configuration information, said radio frame configuration information.
Each of the original uplink subframe of one radio frame configured as two uplink subframes continuous, each of the uplink sub-frame for the continuous size of half the original uplink subframe Yes you can,
Each of the original downlink subframe of one radio frame configured as two downlink subframes continuous, each of the downlink subframes the continuous size of half the original downlink subframe Yes you can,
Each of the original dedicated subframe of one radio frame configured as two dedicated sub-frames consecutive, each of the dedicated sub-frames the continuous will have a magnitude of half of the original dedicated sub-frame that,
Is used to indicate at least one of,
The wireless frame configuration information is
At least one of a plurality of consecutive downlink subframes of one radio frame is configured as a first subframe, and the first subframe is used for uplink service transmission and / or.
At least one of a plurality of consecutive uplink subframes of one radio frame is configured as a second subframe, and the second subframe is used for downlink service transmission.
Further Ru is used to instruct a decision unit,
A transmission unit configured to transmit the wireless frame configuration information to the user equipment UE, and
A communication unit configured to communicate with the UE by using a wireless frame configured according to the wireless frame configuration information.
Base stations including. The first subframe, claim 7 , comprises a protection period and at least one first symbol used for uplink service transmission, wherein the protection period precedes the first symbol. base station. The base station of claim 8 , wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the protection period. The second sub-frame includes a protection period, wherein the at least one third symbol is used for downlink service transmission, the protection period is preceded by the third symbol, claims 7 to 9 The base station according to any one of the above. 10. The base station of claim 10 , wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by the protection period. Specifically, the transmission unit is
By using a broadcast message for the base station, the radio frame configuration information is transmitted to the UE, or for the base station, radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical down. By using the link control channel PDCCH signaling, the radio frame configuration information is transmitted to the UE.
The base station according to any one of claims 7 to 11 , which is configured as such. A receiving unit configured to receive radio frame configuration information transmitted by a base station, wherein the radio frame configuration information is
Each of the original uplink subframe of one radio frame configured as two uplink subframes continuous, each of the uplink sub-frame for the continuous size of half the original uplink subframe Yes you can,
Each of the original downlink subframe of one radio frame configured as two downlink subframes continuous, each of the downlink subframes the continuous size of half the original downlink subframe Yes you can,
Each of the original dedicated subframe of one radio frame configured as two dedicated sub-frames consecutive, each of the dedicated sub-frames the continuous will have a magnitude of half of the original dedicated sub-frame that,
Is used to indicate at least one of,
The wireless frame configuration information is
At least one of a plurality of consecutive downlink subframes of one radio frame is configured as a first subframe, and the first subframe is used for uplink service transmission and / or.
At least one of a plurality of consecutive uplink subframes of one radio frame is configured as a second subframe, and the second subframe is used for downlink service transmission.
Further Ru is used to instruct a receiving unit,
A communication unit configured to communicate with the base station by using a radio frame determined according to the radio frame configuration information.
User equipment UE including. The first sub-frame may include a protection period, and at least one first symbol is used for uplink service transmission, the protection period preceding the first symbol of claim 13 User device. The user device according to claim 14 , wherein the first subframe further comprises at least one second symbol used for downlink service transmission, wherein the second symbol precedes the protection period. The second sub-frame may include a protection period, and at least one of the three symbols are used for downlink service transmission, the protection period is preceded by the third symbol, claims 13 to 15 The user device according to any one of the above. 16. The user equipment of claim 16 , wherein the second subframe further comprises at least one fourth symbol used for uplink service transmission, the fourth symbol being preceded by the protection period. The receiving unit
Receive or receive the radio frame configuration information transmitted by the base station by a broadcast message.
The radio frame configuration information transmitted by the base station is received by radio resource control RRC dedicated signaling, medium access control MAC signaling, or physical downlink control channel PDCCH signaling.
The user device according to any one of claims 13 to 17 , further configured as described above. A computer program that causes a computer to execute the method according to any one of claims 1 to 3 . A computer program that causes a computer to perform the method according to any one of claims 4 to 6 .

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