CN106301739A - Uplink HARQ feedback method based on dynamic frame structure, device and base station - Google Patents

Abstract

The present invention provides an uplink HARQ feedback method, device and base station based on a dynamic frame structure on an unlicensed frequency band, wherein each frame structure only includes uplink subframes and downlink subframes, and each frame structure contains the same type of The subframes are set continuously. The uplink HARQ feedback method includes: judging whether the currently used frame structure needs to be reconfigured; Subframe; when it is determined that reconfiguration is required, determine the corresponding The downlink subframe for uplink HARQ feedback; if the uplink data sent by the terminal on any uplink subframe is received, the uplink subframe corresponding to the uplink HARQ feedback is sent on the downlink subframe HARQ feedback message for data.

Description

Uplink HARQ feedback method, device and base station based on dynamic frame structure

technical field

The present invention relates to the field of communication technologies, in particular to an uplink HARQ feedback method based on a dynamic frame structure on an unlicensed frequency band, an uplink HARQ feedback device based on a dynamic frame structure on an unlicensed frequency band, and a base station.

Background technique

With the rapid increase of communication traffic, the 3GPP authorized spectrum is increasingly insufficient to provide higher network capacity. In order to further improve the utilization of spectrum resources, 3GPP proposes the concept of LAA (LTE Assisted Access, LTE Assisted Access), which is used to use unlicensed spectrum with the help of LTE (Long Term Evolution, Long Term Evolution) licensed spectrum. In order to make the LTE system coexist harmoniously with different systems such as Wi-Fi on the unlicensed frequency band, 3GPP proposed the LBT (Listen Before Talk, Listen Before Talk) mechanism to ensure that the unlicensed frequency band The fairness of using spectrum resources by different systems. Wherein, the working mode of the LTE system in the unlicensed spectrum may be a TDD (Time Division Duplexing, Time Division Duplexing) mode, a supplemental downlink (SDL, Supplemental Downlink) mode or a dynamic uplink and downlink mode.

Among them, the physical layer frame structure of TD-LTE is 10ms, including two half-frames of 5ms, and its uplink and downlink subframe configuration is shown in Table 1:

Table 1

As shown in Table 1, for a TDD structure with a 5ms downlink-to-uplink conversion period, one frame contains 8 normal subframes and 2 special subframes, and whether the 8 normal subframes are used for uplink or downlink can refer to Table 1 . For the TDD structure with a 10ms downlink-to-uplink conversion period, a frame contains 9 normal subframes and a special subframe, and whether the 9 normal subframes are used for uplink or downlink can refer to Table 1. Each normal subframe It also contains 14 symbols (symbols).

The HARQ (Hybrid Automatic Repeat Request) mechanism is an important part of ensuring transmission reliability in the LTE system, and the timing of the HARQ process in different subframe configurations ensures efficient use of time-frequency resources. The traditional uplink HARQ timing adopts synchronous HARQ. The transmission and retransmission of a HARQ process have a fixed timing relationship. Since the receiving end knows the time when the transmission occurs in advance, no additional signaling is required to indicate the HARQ process number. The protocol defines two timing relationships for uplink synchronous HARQ, one is the timing relationship from the base station sending the uplink scheduling command on the PDCCH (Physical Downlink Control Channel) to the terminal sending the corresponding uplink data, and the other is from the terminal sending the uplink The timing relationship of ACK/NACK feedback from data to the base station. Among them, Table 2 shows the two timing relationships:

Table 2

As shown in Table 2, the numbers -k1/k2/k3 in the table respectively represent: if the data is transmitted on the subframe whose subframe number is n, the uplink scheduling signal of PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) The command (ie UL grant) is transmitted in the subframe with the subframe number n-k1; the ACK/NACK information in the PHICH (Physical Hybrid ARQ Indicator Channel, physical HARQ indicator channel) is in the subframe with the subframe number n+k2 Transmission; synchronous retransmission is performed on the subframe whose subframe number is n+k3. If n-k1<0, transmit the uplink scheduling signaling in the subframe whose subframe number is n-k1+10 in the previous radio frame; ACK/NACK information is fed back on the subframe whose subframe number is (n+k2)%10 in the first wireless frame after that (% is the remainder symbol); if n+k3>9 occurs, it means that it should be in Synchronous retransmission is performed on the subframe whose subframe number is (n+k3)%10 in the first radio frame after the current radio frame (% is a remainder symbol); when n+k3>19, then in the current radio frame Synchronous retransmission is performed on the subframe whose subframe number is (n+k)%10 in the second radio frame after the frame.

With the development of Internet technology, the volume of communication services will increase dramatically, and the types of services will become more varied. In the LAA micro-cell environment, due to the small number of users in the cell and the development of data services, the uplink and downlink services are bursty, that is, it is difficult to maintain a stable business ratio between uplink and downlink services. In this case, TD-LTE's way of statically configuring subframes cannot well adapt to the changes brought about by the suddenness of such services, resulting in waste of resources and a decrease in spectrum efficiency.

Therefore, in order to better solve the problems caused by the suddenness of services, a flexible and adaptive uplink and downlink subframe configuration method between cells is needed. For example, fully dynamic TDD configuration and fully dynamic TDD configuration can be used. It dynamically determines the subframe configuration for a period of time in the future according to the current uplink and downlink business volume ratio of the cell. However, in fully dynamic TDD, there is no complete uplink HARQ feedback sequence to ensure stable and orderly transmission of uplink data.

Contents of the invention

Based on at least one of the above-mentioned technical problems, the present invention proposes a new uplink HARQ feedback method and device based on a dynamic frame structure in an unlicensed frequency band, which can aim at the scene of working with a dynamic frame structure in an unlicensed frequency band. The perfect uplink HARQ feedback scheme can ensure the stable and orderly transmission of uplink data.

In view of this, according to the first aspect of the present invention, an uplink HARQ feedback method based on a dynamic frame structure on an unlicensed frequency band is proposed, wherein each frame structure adopted on the unlicensed frequency band only contains uplink frames and downlink subframes, and the subframes of the same type contained in each frame structure are continuously set, and the uplink HARQ feedback method includes: judging whether the frame structure currently used on the unlicensed frequency band needs to be reconfigured; When it is determined that the frame structure currently used in the unlicensed frequency band does not need to be reconfigured, according to the currently used frame structure, determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback; When the frame structure used above needs to be reconfigured, according to the first frame structure used before the reconfiguration time point and the second frame structure to be used, determine each uplink in the last radio frame before the reconfiguration time point The downlink subframe corresponding to the subframe for uplink HARQ feedback; if the uplink data sent by the terminal on any uplink subframe is received, the downlink subframe corresponding to any uplink subframe for uplink HARQ feedback is sent. The HARQ feedback message of the uplink data.

In this technical solution, because each frame structure adopted on the unlicensed frequency band only includes uplink subframes and downlink subframes, that is, the special subframes converted from downlink to uplink are discarded, so that time-frequency resources can be fully obtained. Utilization; since channel detection is required when working in an unlicensed frequency band, by continuously setting the subframes of the same type contained in each frame structure, that is, the uplink subframes and downlink subframes in each frame structure are respectively continuously set, The channel occupancy time can be maximized each time the channel resources are occupied, and thus the instantaneous throughput can be maximized.

Among them, the frame structures that meet the above conditions are as follows: UDDDDDDDDD, UUDDDDDDDDD, UUUDDDDDDD, UUUUDDDDDDD, UUUUUDDDDD, UUUUUUDDDD, UUUUUUUDDD, UUUUUUUUDD, UUUUUUUUUD.

Since the present invention adopts a dynamic frame structure on the unlicensed frequency band, that is, the frame structure can be dynamically configured according to the uplink and downlink traffic, so when the frame structure does not need to be reconfigured, each frame structure can be determined directly according to the currently used frame structure. The uplink subframe corresponds to the downlink subframe for uplink HARQ feedback; when the frame structure needs to be reconfigured, the frame structure used before and after the reconfiguration time point may change, so before determining the reconfiguration time point When the uplink HARQ feedback timing in the last radio frame needs to take into account the frame structures used before and after the reconfiguration time point. It can be seen that in the technical solution of the present invention, in view of the situation that the frame structure needs to be reconfigured and does not need to be reconfigured on the unlicensed frequency band, a scheme of determining the downlink subframe corresponding to the uplink subframe for uplink HARQ feedback is proposed , that is, the technical solution of the present invention proposes a perfect uplink HARQ feedback scheme for the scenario of working in an unlicensed frequency band with a dynamic frame structure, thereby ensuring stable and orderly transmission of uplink data.

In the above technical solution, preferably, the step of determining the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback according to the currently used frame structure specifically includes: according to the currently used frame structure corresponding to The uplink HARQ feedback timing determines the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback.

In this technical solution, for several frame structures proposed by the present invention, different uplink HARQ feedback timings can be defined respectively. Therefore, when the frame structure does not need to be reconfigured, the uplink HARQ feedback sequence corresponding to the currently used frame structure can be used. The HARQ feedback timing is used to determine the downlink subframe corresponding to each uplink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, according to the first frame structure used before the reconfiguration time point and the second frame structure to be used, determine each The step of performing uplink HARQ feedback on downlink subframes corresponding to uplink subframes specifically includes: according to the number of downlink subframes in the first frame structure and the number of downlink subframes in the second frame structure , determining a downlink subframe for performing uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point.

In this technical solution, when reconfiguration is required, the frame structure used before and after the reconfiguration time point may change, that is, the number of downlink subframes and uplink subframes in the frame structure will change, so for To ensure the stability and order of the uplink HARQ feedback timing and avoid the problem of uplink HARQ feedback timing conflict, it is necessary to determine the last Each uplink subframe in a radio frame corresponds to a downlink subframe for performing uplink HARQ feedback.

In the above technical solution, preferably, when the number of downlink subframes in the first frame structure is less than or equal to the number of downlink subframes in the second frame structure, according to the Uplink HARQ feedback timing corresponding to the structure, determining the downlink subframe for uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point; and in the first frame structure When the number of downlink subframes is greater than the number of downlink subframes in the second frame structure, determine the last subframe before the reconfiguration time point according to the uplink HARQ feedback timing corresponding to the second frame structure Each uplink subframe in the radio frame corresponds to a downlink subframe for performing uplink HARQ feedback.

In this technical solution, when the number of downlink subframes in the first frame structure used before the reconfiguration time point is less than or equal to the number of downlink subframes in the second frame structure to be used, the reconfiguration time The uplink HARQ feedback timing of the last radio frame before the reconfiguration time point can still use the uplink HARQ feedback timing corresponding to the first frame structure, which can ensure that each uplink subframe in the last radio frame before the reconfiguration time point has the same The corresponding downlink subframe for performing uplink HARQ feedback. When the number of downlink subframes in the first frame structure used before the reconfiguration time point is greater than the number of downlink subframes in the second frame structure to be used, in order to ensure that the last wireless subframe before the reconfiguration time point Each uplink subframe in the frame has a corresponding downlink subframe for uplink HARQ feedback, then the reconfiguration time point can be determined according to the uplink HARQ feedback timing sequence corresponding to the second frame structure used after the reconfiguration time point Each uplink subframe in the previous last radio frame corresponds to a downlink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback is greater than or equal to 3.

In this technical solution, since the information transmission time plus the calculation and processing time of the base station requires at least 3 ms, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback should be greater than or equal to 3 , for example, the subframe number n is an uplink subframe, then the nearest downlink subframe corresponding to subframe n for uplink HARQ feedback should be n+4 (3 subframes before subframe n).

In any of the above technical solutions, preferably, if the frame structure used on the unlicensed frequency band contains multiple downlink subframes, the number of uplink HARQ feedback messages sent on the multiple downlink subframes is balanced .

In this technical solution, the problem of excessive HARQ signaling overhead on a certain downlink subframe can be avoided by balancing the number of uplink HARQ feedback messages respectively sent in multiple downlink subframes.

According to the second aspect of the present invention, an uplink HARQ feedback device based on a dynamic frame structure on an unlicensed frequency band is also proposed, wherein each frame structure adopted on the unlicensed frequency band only includes uplink subframes and downlink Subframes, and the subframes of the same type contained in each frame structure are continuously set, the uplink HARQ feedback device includes: a judging unit, used to judge whether the frame structure currently used on the unlicensed frequency band needs to be re-configured Configuration; the first determining unit is used to determine, according to the currently used frame structure, that each uplink subframe corresponds to the uplink HARQ when the judging unit determines that the frame structure currently used on the unlicensed frequency band does not need to be reconfigured Feedback downlink subframe; a second determining unit, configured to, when the judging unit determines that the frame structure currently used on the unlicensed frequency band needs to be reconfigured, according to the first frame structure used before the reconfiguration time point and the frame structure to be used The second frame structure, determining the downlink subframe corresponding to each uplink subframe in the last radio frame before the reconfiguration time point for uplink HARQ feedback; When the uplink data is sent on the frame, the HARQ feedback message for the uplink data is sent on the downlink subframe corresponding to any uplink subframe for uplink HARQ feedback.

In this technical solution, because each frame structure adopted on the unlicensed frequency band only includes uplink subframes and downlink subframes, that is, the special subframes converted from downlink to uplink are discarded, so that time-frequency resources can be fully obtained. Utilization; since channel detection is required when working in an unlicensed frequency band, by continuously setting the subframes of the same type contained in each frame structure, that is, the uplink subframes and downlink subframes in each frame structure are respectively continuously set, The channel occupancy time can be maximized each time the channel resources are occupied, and thus the instantaneous throughput can be maximized.

Among them, the frame structures that meet the above conditions are as follows: UDDDDDDDDD, UUDDDDDDDDD, UUUDDDDDDD, UUUUDDDDDDD, UUUUUDDDDD, UUUUUUDDDD, UUUUUUUDDD, UUUUUUUUDD, UUUUUUUUUD.

Since the present invention adopts a dynamic frame structure on the unlicensed frequency band, that is, the frame structure can be dynamically configured according to the uplink and downlink traffic, so when the frame structure does not need to be reconfigured, each frame structure can be determined directly according to the currently used frame structure. The uplink subframe corresponds to the downlink subframe for uplink HARQ feedback; when the frame structure needs to be reconfigured, the frame structure used before and after the reconfiguration time point may change, so before determining the reconfiguration time point When the uplink HARQ feedback timing in the last radio frame needs to take into account the frame structures used before and after the reconfiguration time point. It can be seen that in the technical solution of the present invention, in view of the situation that the frame structure needs to be reconfigured and does not need to be reconfigured on the unlicensed frequency band, a scheme of determining the downlink subframe corresponding to the uplink subframe for uplink HARQ feedback is proposed , that is, the technical solution of the present invention proposes a perfect uplink HARQ feedback scheme for the scenario of working in an unlicensed frequency band with a dynamic frame structure, thereby ensuring stable and orderly transmission of uplink data.

In the above technical solution, preferably, the first determination unit is specifically configured to: determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback according to the uplink HARQ feedback timing corresponding to the currently used frame structure .

In this technical solution, for several frame structures proposed by the present invention, different uplink HARQ feedback timings can be defined respectively. Therefore, when the frame structure does not need to be reconfigured, the uplink HARQ feedback sequence corresponding to the currently used frame structure can be used. The HARQ feedback timing is used to determine the downlink subframe corresponding to each uplink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, the second determining unit is specifically configured to: according to the number of downlink subframes in the first frame structure and the number of downlink subframes in the second frame structure Determine the downlink subframe for performing uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point.

In this technical solution, when reconfiguration is required, the frame structure used before and after the reconfiguration time point may change, that is, the number of downlink subframes and uplink subframes in the frame structure will change, so for To ensure the stability and order of the uplink HARQ feedback timing and avoid the problem of HARQ feedback timing conflicts, it is necessary to determine the last subframe before the reconfiguration time point according to the number of downlink subframes in the frame structure used before and after the reconfiguration time point. Each uplink subframe in the radio frame corresponds to a downlink subframe for performing uplink HARQ feedback.

In the above technical solution, preferably, the second determining unit is further configured: the number of downlink subframes in the first frame structure is less than or equal to the number of downlink subframes in the second frame structure When the number is large, according to the uplink HARQ feedback timing corresponding to the first frame structure, determine the downlink subframe for uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point ;as well as

When the number of downlink subframes in the first frame structure is greater than the number of downlink subframes in the second frame structure, according to the uplink HARQ feedback timing corresponding to the second frame structure, determine the Each uplink subframe in the last radio frame before the reconfiguration time point corresponds to a downlink subframe for performing uplink HARQ feedback.

In this technical solution, when the number of downlink subframes in the first frame structure used before the reconfiguration time point is less than or equal to the number of downlink subframes in the second frame structure to be used, the reconfiguration time The uplink HARQ feedback timing of the last radio frame before the reconfiguration time point can still use the uplink HARQ feedback timing corresponding to the first frame structure, which can ensure that each uplink subframe in the last radio frame before the reconfiguration time point has the same The corresponding downlink subframe for performing uplink HARQ feedback. When the number of downlink subframes in the first frame structure used before the reconfiguration time point is greater than the number of downlink subframes in the second frame structure to be used, in order to ensure that the last wireless subframe before the reconfiguration time point Each uplink subframe in the frame has a corresponding downlink subframe for uplink HARQ feedback, then it can be determined according to the uplink HARQ feedback timing corresponding to the second frame structure used after the reconfiguration time point. Each uplink subframe in the last radio frame of , corresponds to a downlink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback is greater than or equal to 3.

In this technical solution, since the information transmission time plus the calculation and processing time of the base station requires at least 3 ms, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback should be greater than or equal to 3 , for example, the subframe number n is an uplink subframe, then the nearest downlink subframe corresponding to subframe n for uplink HARQ feedback should be n+4 (3 subframes before subframe n).

In any of the above technical solutions, preferably, if the frame structure used on the unlicensed frequency band contains multiple downlink subframes, the number of uplink HARQ feedback messages sent on the multiple downlink subframes is balanced .

In this technical solution, the problem of excessive HARQ signaling overhead on a certain downlink subframe can be avoided by balancing the number of uplink HARQ feedback messages respectively sent in multiple downlink subframes.

According to a third aspect of the present invention, a base station is also proposed, including: the uplink HARQ feedback device based on a dynamic frame structure in an unlicensed frequency band as described in any one of the above technical solutions.

Through the above technical solutions, a complete uplink HARQ feedback solution can be proposed for the scenario of working in an unlicensed frequency band with a dynamic frame structure, thereby ensuring stable and orderly transmission of uplink data.

Description of drawings

FIG. 1 shows a schematic flowchart of an uplink HARQ feedback method based on a dynamic frame structure on an unlicensed frequency band according to an embodiment of the present invention;

Fig. 2 shows a schematic diagram of a wireless frame at a non-reconfiguration point according to an embodiment of the present invention;

Fig. 3 shows a schematic diagram of a wireless frame at a reconfiguration point according to an embodiment of the present invention;

FIG. 4 shows a schematic diagram of conflicts occurring in uplink HARQ feedback at a reconfiguration point;

FIG. 5 shows a schematic diagram of the comparison relationship between subframes in the frame structure proposed by the present invention;

6 shows a schematic diagram of the uplink HARQ feedback timing in the boundary frame when the subframe structure with fewer downlink subframes is converted to the subframe structure with more downlink subframes according to an embodiment of the present invention;

FIG. 7 shows a schematic diagram of uplink HARQ feedback timing in boundary frames when switching from a subframe structure with more downlink subframes to a subframe structure with fewer downlink subframes according to an embodiment of the present invention;

FIG. 8 shows a schematic block diagram of an uplink HARQ feedback device based on a dynamic frame structure on an unlicensed frequency band according to an embodiment of the present invention;

Fig. 9 shows a schematic block diagram of a base station according to an embodiment of the present invention;

Fig. 10 shows a schematic block diagram of a base station according to another embodiment of the present invention.

detailed description

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

In the technical solution of the present invention, a dynamic frame structure adopted on an unlicensed frequency band is first proposed. Specifically, the period of the dynamic change of the subframe can be dynamic, for example, it can be 10ms, 40ms, etc. These frame structures mainly meet the following requirements:

1. In order to ensure full utilization of time-frequency resources, there is no special subframe for downlink to uplink conversion in the new frame structure.

2. Due to the existence of the LBT mechanism on the unlicensed frequency band, channel detection is required before using channel resources, and in one case, the channel occupancy ends when a subframe with the opposite transmission direction is encountered when the channel is occupied. Therefore, the uplink and downlink subframes in the new frame structure appear continuously to ensure that the channel occupation time is maximized after each channel resource is occupied, thereby maximizing the uplink and downlink instantaneous throughput.

3. Since each uplink subframe "U" requires the base station to send corresponding scheduling signaling to determine the corresponding coding and modulation mode and other information, and the ACK/NACK feedback information corresponding to the uplink data needs to be sent on the downlink subframe, so all The frame structure of the uplink subframe is not desirable; the feedback information ACK/NACK corresponding to the downlink data needs to be sent in the uplink subframe, so the frame structure of all downlink subframes is also not desirable.

Based on the above requirements, the frame structure proposed by the present invention specifically includes the following types: UDDDDDDDDD, UUDDDDDDDDD, UUUDDDDDDD, UUUUDDDDDD, UUUUUDDDDD, UUUUUUDDDD, UUUUUUUDDD, UUUUUUUUDD, UUUUUUUUUD.

Since it is an uplink HARQ feedback scheme based on a dynamic frame structure, it may be necessary to reconfigure the subsequent frame structure when the subframe reconfiguration period arrives, that is, determine the subsequent frame structure according to the ratio of the uplink and downlink traffic changes. . In the technical solution of the present invention, the moment when the reconfiguration period arrives is called the reconfiguration time point, and the subframe configuration does not change at the non-reconfiguration time point.

Based on the above-mentioned frame structure, the uplink HARQ feedback method based on the dynamic frame structure on the unlicensed frequency band proposed by the present invention is specifically shown in Figure 1, including:

Step S10, judging whether the frame structure currently used in the unlicensed frequency band needs to be reconfigured.

Step S12, when it is determined that the frame structure currently used in the unlicensed frequency band does not need to be reconfigured, according to the currently used frame structure, determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback.

Wherein, in one embodiment of the present invention, step S12 specifically includes: according to the uplink HARQ feedback timing corresponding to the currently used frame structure, determining the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback. That is, when the frame structure does not need to be reconfigured, the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback may be determined according to the uplink HARQ feedback timing corresponding to the currently used frame structure.

Step S14, when it is determined that the frame structure currently used on the unlicensed frequency band needs to be reconfigured, according to the first frame structure used before the reconfiguration time point and the second frame structure to be used, determine the frame structure before the reconfiguration time point Each uplink subframe in the last radio frame of , corresponds to a downlink subframe for performing uplink HARQ feedback.

Wherein, in one embodiment of the present invention, step S14 specifically includes: according to the number of downlink subframes in the first frame structure and the number of downlink subframes in the second frame structure, determining the Each uplink subframe in the last radio frame before the reconfiguration time point corresponds to a downlink subframe for performing uplink HARQ feedback.

Specifically, when the number of downlink subframes in the first frame structure is less than or equal to the number of downlink subframes in the second frame structure, according to the uplink HARQ corresponding to the first frame structure Feedback timing, determining the downlink subframe for uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point; and

When the number of downlink subframes in the first frame structure is greater than the number of downlink subframes in the second frame structure, according to the uplink HARQ feedback timing corresponding to the second frame structure, determine the Each uplink subframe in the last radio frame before the reconfiguration time point corresponds to a downlink subframe for performing uplink HARQ feedback.

Among them, for the interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback, the present invention stipulates as follows: the subframe between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback The interval is greater than or equal to 3.

Specifically, since the information transmission time plus the calculation and processing time of the base station requires at least 3ms, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback should be greater than or equal to 3, for example The subframe number n is an uplink subframe, and the nearest downlink subframe corresponding to subframe n for uplink HARQ feedback should be n+4 (3 subframes before subframe n).

In addition, in order to avoid the problem of excessive HARQ signaling overhead on a certain downlink subframe, when the frame structure used on the unlicensed frequency band contains multiple downlink subframes, the multiple downlink subframes are respectively The number of sent uplink HARQ feedback messages is balanced.

The uplink HARQ feedback method based on the dynamic frame structure on the unlicensed frequency band shown in Figure 1 also includes:

Step S16, if the uplink data sent by the terminal on any uplink subframe is received, send a HARQ feedback message for the uplink data on the downlink subframe corresponding to any uplink subframe for uplink HARQ feedback.

It can be seen that in the technical solution of the present invention, in view of the situation that the frame structure needs to be reconfigured and does not need to be reconfigured on the unlicensed frequency band, a scheme of determining the downlink subframe corresponding to the uplink subframe for uplink HARQ feedback is proposed , that is, the technical solution of the present invention proposes a perfect uplink HARQ feedback scheme for the scenario of working in an unlicensed frequency band with a dynamic frame structure, thereby ensuring stable and orderly transmission of uplink data.

The scheme shown in Figure 1 is described in detail below with specific subframe configurations:

Nine kinds of frame structures proposed by the present invention are as follows:

Configuration 0: UDDDDDDDDD; Configuration 1: UUDDDDDDDDD; Configuration 2: UUUDDDDDDD; Configuration 3: UUUUDDDDDDD; Configuration 4: UUUUUDDDDD; Configuration 5: UUUUUUDDDD; Configuration 6: UUUUUUUDDD; Configuration 7: UUUUUUUUDD; The following describes the non-reconfiguration point and the reconfiguration point respectively:

1. Non-reassignment point

At the time of the non-reconfiguration point, the subframe configuration remains unchanged, as shown in Figure 2: since it is a non-reconfiguration point, both radio frame 1 and radio frame 2 adopt the same frame structure configuration, for example, both adopt configuration 5.

For the above nine frame structures, the present invention proposes uplink HARQ feedback timings for the nine frame structures respectively, and the uplink HARQ feedback timing satisfies the following conditions:

1. Since the information transmission time plus the calculation and processing time of the terminal requires at least 3ms, the uplink subframe for sending uplink data and the corresponding downlink subframe for uplink HARQ feedback (that is, feedback of ACK/NACK information) must be separated by at least 3 subframes.

2. In a frame structure with more than 1 downlink subframe, the uplink HARQ feedback for uplink data should be distributed among these downlink subframes as evenly as possible to avoid excessive signaling overhead of uplink HARQ feedback on a certain downlink subframe .

On the basis of the above conditions, the present invention proposes a preferred uplink HARQ feedback timing, specifically as shown in Table 3:

table 3

As shown in Table 3, the number k in the table represents: if the PUSCH transmits data in the subframe with the subframe number n, then the ACK/NACK information in the PHICH is transmitted in the subframe with the subframe number n+k. Wherein, if n+k>9, the ACK/NACK information is fed back in the downlink subframe whose subframe number is (n+k)%10 in the first radio frame after the current radio frame (% is the remainder symbol) ; When n+k>19, feed back ACK/NACK information in the downlink subframe whose subframe number is (n+k)%10 in the second radio frame after the current radio frame.

2. Reconfiguration point

At the time of the reconfiguration point, the subframe configuration changes, as shown in Figure 3: the radio frame 1 before the reconfiguration point adopts the configuration 5, and the radio frame 2 after the reconfiguration point adopts the configuration 3. Hereinafter, the last radio frame before the reconfiguration point is called a boundary frame.

After the reconfiguration period, the HARQ timing of the radio frame before and after the reconfiguration point is different (unless the subframe configuration after the reconfiguration point is consistent with the one before the reconfiguration point), and the HARQ timing conflict may occur during the transition between the two subframe configurations Condition. Specifically as shown in Figure 4, the subframe structure on the unlicensed frequency band is converted from configuration 6 to configuration 7. According to the uplink HARQ feedback timing shown in Table 3, it can be known that the uplink subframe No. 6 in the boundary frame before the reconfiguration point sends The ACK/NACK feedback corresponding to the uplink data should be fed back in the No. 7 downlink subframe in the wireless frame after the reconfiguration point, but because the No. 7 subframe in the frame structure after reconfiguration becomes an uplink subframe, the uplink HARQ occurs. Feedback timing conflicts.

At the same time, from the configuration of the frame structure, the number of downlink subframes from configuration 8 to configuration 0 in the above frame structure increases sequentially, and except for the extra downlink subframes, the positions of other downlink subframes are the same, as shown in the figure 5. Therefore, when the configuration with fewer downlink subframes is reconfigured to the configuration with more downlink subframes, the uplink HARQ feedback timing in the boundary frame will not be affected; when the configuration with more downlink subframes is reconfigured to the configuration with fewer downlink subframes , the uplink HARQ feedback timing in the boundary frame may conflict.

Therefore the solution that the present invention proposes is:

1. When the number of downlink subframes in the frame structure after the reconfiguration point is greater than or equal to the number of downlink subframes in the frame structure before the reconfiguration point, the uplink HARQ feedback timing of the boundary frame does not change. Specifically as shown in Figure 6, the subframe structure on the unlicensed frequency band is converted from configuration 7 to configuration 6. Since the number of downlink subframes in configuration 6 is greater than the number of downlink subframes in configuration 7, the uplink HARQ feedback timing in the boundary frame No change (take the uplink HARQ feedback timing shown in Table 3 as an example).

2. When the number of downlink subframes in the frame structure after the reconfiguration point is smaller than the number of downlink subframes in the frame structure before the reconfiguration point, the uplink HARQ feedback timing of the boundary frame adopts the uplink HARQ feedback corresponding to the frame structure after the reconfiguration point timing. Specifically as shown in Figure 7, the subframe structure on the unlicensed frequency band is converted from configuration 6 to configuration 7. Since the number of downlink subframes in configuration 6 is greater than the number of downlink subframes in configuration 7, the uplink HARQ feedback timing in the boundary frame The HARQ feedback timing corresponding to configuration 7 is adopted (taking the uplink HARQ feedback timing shown in Table 3 as an example).

Based on the dynamic frame structure proposed above in the present invention, the present invention also proposes an uplink HARQ feedback device based on a dynamic frame structure in an unlicensed frequency band, specifically as shown in FIG. 8 , the uplink HARQ feedback device 800 includes: a judging unit 802, A first determining unit 804 , a second determining unit 806 and a sending unit 808 .

Among them, the judging unit 802 is used to judge whether the frame structure currently used on the unlicensed frequency band needs to be reconfigured; the first determining unit 804 is used to judge whether the frame structure currently used on the unlicensed frequency band needs to be reconfigured; When reconfiguring, according to the currently used frame structure, determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback; the second determination unit 806 is used to determine the current use in the unlicensed frequency band in the judgment unit 802 When the frame structure needs to be reconfigured, determine each uplink subframe in the last radio frame before the reconfiguration time point according to the first frame structure used before the reconfiguration time point and the second frame structure to be used The corresponding downlink subframe for uplink HARQ feedback; the sending unit 808 is configured to, when receiving the uplink data sent by the terminal on any uplink subframe, perform uplink HARQ feedback in the downlink subframe corresponding to any uplink subframe sending a HARQ feedback message for the uplink data.

In this technical solution, because each frame structure adopted on the unlicensed frequency band only includes uplink subframes and downlink subframes, that is, the special subframes converted from downlink to uplink are discarded, so that time-frequency resources can be fully obtained. Utilization; since channel detection is required when working in an unlicensed frequency band, by continuously setting the subframes of the same type contained in each frame structure, that is, the uplink subframes and downlink subframes in each frame structure are respectively continuously set, The channel occupancy time can be maximized each time the channel resources are occupied, and thus the instantaneous throughput can be maximized.

Since the present invention adopts a dynamic frame structure on the unlicensed frequency band, that is, the frame structure can be dynamically configured according to the uplink and downlink traffic, so when the frame structure does not need to be reconfigured, each frame structure can be determined directly according to the currently used frame structure. The uplink subframe corresponds to the downlink subframe for uplink HARQ feedback; when the frame structure needs to be reconfigured, the frame structure used before and after the reconfiguration time point may change, so before determining the reconfiguration time point When the uplink HARQ feedback timing in the last radio frame needs to take into account the frame structures used before and after the reconfiguration time point. It can be seen that in the technical solution of the present invention, in view of the situation that the frame structure needs to be reconfigured and does not need to be reconfigured on the unlicensed frequency band, a scheme of determining the downlink subframe corresponding to the uplink subframe for uplink HARQ feedback is proposed , that is, the technical solution of the present invention proposes a perfect uplink HARQ feedback scheme for the scenario of working in an unlicensed frequency band with a dynamic frame structure, thereby ensuring stable and orderly transmission of uplink data.

In the above technical solution, preferably, the first determining unit 804 is specifically configured to: determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback according to the uplink HARQ feedback timing corresponding to the currently used frame structure. frame.

In this technical solution, for several frame structures proposed by the present invention, different uplink HARQ feedback timings can be defined respectively. Therefore, when the frame structure does not need to be reconfigured, the uplink HARQ feedback sequence corresponding to the currently used frame structure can be used. The HARQ feedback timing is used to determine the downlink subframe corresponding to each uplink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, the second determining unit 806 is specifically configured to: according to the number of downlink subframes in the first frame structure and the number of downlink subframes in the second frame structure The number determines the downlink subframe for performing uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point.

In this technical solution, when reconfiguration is required, the frame structure used before and after the reconfiguration time point may change, that is, the number of downlink subframes and uplink subframes in the frame structure will change, so for To ensure the stability and order of the uplink HARQ feedback timing and avoid the problem of HARQ feedback timing conflicts, it is necessary to determine the last subframe before the reconfiguration time point according to the number of downlink subframes in the frame structure used before and after the reconfiguration time point. Each uplink subframe in the radio frame corresponds to a downlink subframe for performing uplink HARQ feedback.

In the above technical solution, preferably, the second determining unit 806 is further configured: the number of downlink subframes in the first frame structure is less than or equal to the number of downlink subframes in the second frame structure When the number of uplink HARQ feedback is corresponding to the first frame structure, determine the downlink subframe corresponding to each uplink subframe in the last radio frame before the reconfiguration time point for uplink HARQ feedback frame; and

When the number of downlink subframes in the first frame structure is greater than the number of downlink subframes in the second frame structure, according to the uplink HARQ feedback timing corresponding to the second frame structure, determine the Each uplink subframe in the last radio frame before the reconfiguration time point corresponds to a downlink subframe for performing uplink HARQ feedback.

In this technical solution, when the number of downlink subframes in the first frame structure used before the reconfiguration time point is less than or equal to the number of downlink subframes in the second frame structure to be used, the reconfiguration time The uplink HARQ feedback timing of the last radio frame before the reconfiguration time point can still use the uplink HARQ feedback timing corresponding to the first frame structure, which can ensure that each uplink subframe in the last radio frame before the reconfiguration time point has the same The corresponding downlink subframe for performing uplink HARQ feedback. When the number of downlink subframes in the first frame structure used before the reconfiguration time point is greater than the number of downlink subframes in the second frame structure to be used, in order to ensure that the last wireless subframe before the reconfiguration time point Each uplink subframe in the frame has a corresponding downlink subframe for uplink HARQ feedback, then it can be determined according to the uplink HARQ feedback timing corresponding to the second frame structure used after the reconfiguration time point. Each uplink subframe in the last radio frame of , corresponds to a downlink subframe for performing uplink HARQ feedback.

In any of the above technical solutions, preferably, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback is greater than or equal to 3.

In this technical solution, since the information transmission time plus the calculation and processing time of the base station requires at least 3 ms, the subframe interval between each uplink subframe and the corresponding downlink subframe for uplink HARQ feedback should be greater than or equal to 3 , for example, the subframe number n is an uplink subframe, then the nearest downlink subframe corresponding to subframe n for uplink HARQ feedback should be n+4 (3 subframes before subframe n).

In any of the above technical solutions, preferably, if the frame structure used on the unlicensed frequency band contains multiple downlink subframes, the number of uplink HARQ feedback messages sent on the multiple downlink subframes is balanced .

In this technical solution, the problem of excessive HARQ signaling overhead on a certain downlink subframe can be avoided by balancing the number of uplink HARQ feedback messages respectively sent in multiple downlink subframes.

Fig. 9 shows a schematic block diagram of a base station according to an embodiment of the present invention.

As shown in FIG. 9 , a base station 900 according to an embodiment of the present invention includes: an uplink HARQ feedback apparatus 800 based on a dynamic frame structure in an unlicensed frequency band as shown in FIG. 8 .

Fig. 10 shows a schematic block diagram of a base station according to another embodiment of the present invention.

As shown in FIG. 10 , another base station according to an embodiment of the present invention includes: a processor 1, an input device 3 connected to the processor 1 through an interface 2, and a memory 5 connected to the processor 1 through a bus 4 . Wherein, the memory 5 is used to store a set of program codes, and the processor 1 is used to call the program codes stored in the memory 5 to perform the following operations:

Judging by the input device 3 whether the frame structure currently used on the unlicensed frequency band needs to be reconfigured;

When it is determined that reconfiguration is not required, according to the currently used frame structure, determine the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback;

When it is determined that reconfiguration is required, according to the first frame structure used before the reconfiguration time point and the second frame structure to be used, it is determined that each uplink subframe in the last radio frame before the reconfiguration time point corresponds to The downlink subframe for performing uplink HARQ feedback;

If the input device 3 receives the uplink data sent by the terminal on any uplink subframe, it sends a HARQ feedback message for the uplink data on the downlink subframe corresponding to any uplink subframe for uplink HARQ feedback.

As an optional implementation manner, the processor 1 invokes the program code stored in the memory 5, and executes the operation of determining the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback according to the currently used frame structure as follows:

According to the uplink HARQ feedback timing corresponding to the currently used frame structure, the downlink subframe corresponding to each uplink subframe for uplink HARQ feedback is determined.

As an optional implementation manner, the processor 1 invokes the program code stored in the memory 5, and executes determining the reconfiguration time point according to the first frame structure used before the reconfiguration time point and the second frame structure to be used. Each uplink subframe in the previous last radio frame corresponds to the operation of the downlink subframe for uplink HARQ feedback, specifically:

According to the number of downlink subframes in the first frame structure and the number of downlink subframes in the second frame structure, determine each uplink subframe in the last radio frame before the reconfiguration time point A frame corresponds to a downlink subframe for performing uplink HARQ feedback.

As an optional implementation manner, the processor 1 is used to call the program code stored in the memory 5, and is also used to perform the following operations:

When the number of downlink subframes in the first frame structure is less than or equal to the number of downlink subframes in the second frame structure, according to the uplink HARQ feedback timing corresponding to the first frame structure, A downlink subframe for performing uplink HARQ feedback corresponding to each uplink subframe in the last radio frame before the reconfiguration time point is determined.

As an optional implementation manner, the processor 1 is used to call the program code stored in the memory 5, and is also used to perform the following operations:

When the number of downlink subframes in the first frame structure is greater than the number of downlink subframes in the second frame structure, according to the uplink HARQ feedback timing corresponding to the second frame structure, determine the Each uplink subframe in the last radio frame before the reconfiguration time point corresponds to a downlink subframe for performing uplink HARQ feedback.

The steps in the methods of the embodiments of the present invention can be adjusted, combined and deleted according to actual needs.

Units in the base station in the embodiment of the present invention can be combined, divided and deleted according to actual needs.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium includes read-only Memory (Read-Only Memory, ROM), Random Access Memory (Random Access Memory, RAM), Programmable Read-Only Memory (Programmable Read-only Memory, PROM), Erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), One-time Programmable Read-Only Memory (OTPROM), Electronically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CompactDisc Read -Only Memory, CD-ROM) or other optical disk storage, magnetic disk storage, tape storage, or any other computer-readable medium that can be used to carry or store data.

The technical solution of the present invention has been described in detail above in conjunction with the accompanying drawings. The present invention proposes a new uplink HARQ feedback scheme based on a dynamic frame structure in an unlicensed frequency band, which can be used for scenarios where a dynamic frame structure is used in an unlicensed frequency band. A complete uplink HARQ feedback scheme is proposed, which effectively makes up for the lack of uplink HARQ feedback timing when using dynamic subframe configuration on unlicensed frequency bands, ensures stable and orderly transmission of uplink data, and ensures efficient use of time-frequency resources. system performance.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (15)

1. uplink HARQ feedback method based on dynamic frame structure in a unauthorized frequency range, it is characterised in that non-award described The every kind of frame structure used in power frequency range only comprises comprise in sub-frame of uplink and descending sub frame, and described every kind of frame structure same The subframe of one type is arranged continuously, described uplink HARQ feedback method, including:

Judge that the current frame structure used in unauthorized frequency range is the need of reconfiguring；

When judging that the current frame structure used in unauthorized frequency range is made without reconfiguring, according to currently used frame knot Structure, determines the descending sub frame carrying out uplink HARQ feedback that each sub-frame of uplink is corresponding；

When judging that the current frame structure used in unauthorized frequency range needs to reconfigure, before reconfiguration time point The first frame structure used and the second frame structure that will use, last before determining described reconfiguration time point is wireless The descending sub frame carrying out uplink HARQ feedback that each sub-frame of uplink in frame is corresponding；

If receiving the upstream data that terminal sends on arbitrary sub-frame of uplink, then the carrying out that described arbitrary sub-frame of uplink is corresponding The HARQ feedback message for described upstream data is sent on the descending sub frame of uplink HARQ feedback.

Uplink HARQ feedback method based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 1 It is, described according to currently used frame structure, determine the descending son carrying out uplink HARQ feedback that each sub-frame of uplink is corresponding The step of frame, specifically includes:

According to the uplink HARQ feedback sequential corresponding with currently used frame structure, determine the carrying out that each sub-frame of uplink is corresponding The descending sub frame of uplink HARQ feedback.

Uplink HARQ feedback method based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 1 It is, described according to the first frame structure used before reconfiguration time point and the second frame structure that will use, determine described What each sub-frame of uplink in last radio frames before reconfiguration time point was corresponding carries out the descending of uplink HARQ feedback The step of subframe, specifically includes:

The number of the descending sub frame in number according to the descending sub frame in described first frame structure and described second frame structure, really What each sub-frame of uplink in last radio frames before described reconfiguration time point was corresponding calmly carries out uplink HARQ feedback Descending sub frame.

Uplink HARQ feedback method based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 3 It is:

The number of the descending sub frame in described first frame structure is less than or equal to the descending sub frame in described second frame structure During number, according to the uplink HARQ feedback sequential corresponding with described first frame structure, before determining described reconfiguration time point Last radio frames in the descending sub frame carrying out uplink HARQ feedback corresponding to each sub-frame of uplink.

Uplink HARQ feedback method based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 3 It is:

When the number of the descending sub frame in described first frame structure is more than the number of the descending sub frame in described second frame structure, According to the uplink HARQ feedback sequential corresponding with described second frame structure, determine before described reconfiguration time point last The descending sub frame carrying out uplink HARQ feedback that each sub-frame of uplink in individual radio frames is corresponding.

Uplink HARQ feedback based on dynamic frame structure in unauthorized frequency range the most according to any one of claim 1 to 5 Method, it is characterised in that the subframe between described each sub-frame of uplink and the corresponding descending sub frame carrying out uplink HARQ feedback Interval is more than or equal to 3.

Uplink HARQ feedback based on dynamic frame structure in unauthorized frequency range the most according to any one of claim 1 to 5 Method, it is characterised in that if including multiple descending sub frame, then the plurality of in the frame structure used in unauthorized frequency range The equal number of the uplink HARQ feedback message sent respectively on descending sub frame.

8. uplink HARQ feedback device based on dynamic frame structure in a unauthorized frequency range, it is characterised in that non-award described The every kind of frame structure used in power frequency range only comprises comprise in sub-frame of uplink and descending sub frame, and described every kind of frame structure same The subframe of one type is arranged continuously, described uplink HARQ feedback device, including:

Judging unit, for judging that the current frame structure used in unauthorized frequency range is the need of reconfiguring；

First determines unit, for described judging unit judge the current frame structure used in unauthorized frequency range need not into Row is when reconfiguring, according to currently used frame structure, determine each sub-frame of uplink corresponding carry out the descending of uplink HARQ feedback Subframe；

Second determines unit, for judging that the current frame structure used in unauthorized frequency range needs to carry out at described judging unit When reconfiguring, according to the first frame structure used before reconfiguration time point and the second frame structure that will use, determine described What each sub-frame of uplink in last radio frames before reconfiguration time point was corresponding carries out the descending of uplink HARQ feedback Subframe；

Transmitting element, for when receiving the upstream data that terminal sends on arbitrary sub-frame of uplink, described arbitrary up The HARQ feedback message for described upstream data is sent on the descending sub frame carrying out uplink HARQ feedback that subframe is corresponding.

Uplink HARQ feedback device based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 8 Be, described first determine unit specifically for:

According to the uplink HARQ feedback sequential corresponding with currently used frame structure, determine the carrying out that each sub-frame of uplink is corresponding The descending sub frame of uplink HARQ feedback.

Uplink HARQ feedback device based on dynamic frame structure, its feature in unauthorized frequency range the most according to claim 8 Be, described second determine unit specifically for:

The number of the descending sub frame in number according to the descending sub frame in described first frame structure and described second frame structure, really What each sub-frame of uplink in last radio frames before described reconfiguration time point was corresponding calmly carries out uplink HARQ feedback Descending sub frame.

Uplink HARQ feedback device based on dynamic frame structure in 11. unauthorized frequency ranges according to claim 10, it is special Levying and be, described second determines that unit is specifically additionally operable to:

The number of the descending sub frame in described first frame structure is less than or equal to the descending sub frame in described second frame structure During number, according to the uplink HARQ feedback sequential corresponding with described first frame structure, before determining described reconfiguration time point Last radio frames in the descending sub frame carrying out uplink HARQ feedback corresponding to each sub-frame of uplink.

Uplink HARQ feedback device based on dynamic frame structure in 12. unauthorized frequency ranges according to claim 10, it is special Levying and be, described second determines that unit is specifically additionally operable to:

When the number of the descending sub frame in described first frame structure is more than the number of the descending sub frame in described second frame structure, According to the uplink HARQ feedback sequential corresponding with described second frame structure, determine before described reconfiguration time point last The descending sub frame carrying out uplink HARQ feedback that each sub-frame of uplink in individual radio frames is corresponding.

13. is anti-to ascending HARQ based on dynamic frame structure in the unauthorized frequency range according to any one of 12 according to Claim 8 Feedback device, it is characterised in that the son between described each sub-frame of uplink and the corresponding descending sub frame carrying out uplink HARQ feedback Frame period is more than or equal to 3.

14. is anti-to ascending HARQ based on dynamic frame structure in the unauthorized frequency range according to any one of 12 according to Claim 8 Feedback device, it is characterised in that if including multiple descending sub frame, then described many in the frame structure used in unauthorized frequency range The equal number of the uplink HARQ feedback message sent respectively on individual descending sub frame.

15. 1 kinds of base stations, it is characterised in that including: in the unauthorized frequency range as according to any one of claim 8 to 14 based on The uplink HARQ feedback device of dynamic frame structure.