CN102164029A - Method and device for transmitting ACK (acknowledgement)/NACK (negative acknowledgement) feedback information - Google Patents
Method and device for transmitting ACK (acknowledgement)/NACK (negative acknowledgement) feedback information Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and device for transmitting ACK (acknowledgement) /NACK (negative acknowledgement) feedback information, which are characterized in that through the application of the technical scheme of the embodiment of the invention, in an LTE-A (long term evolution advanced) system, when the carrier allocation information is received correctly, a terminal device and a base station consistently confirm that the generation and transmission strategies of ACK/NACK feedback information are distinguished according to the defined effective time point of the carrier allocation information, thereby avoiding the understanding differences on the bit number of the ACK/NACK feedback information between the terminal device and the base station, and reducing the ACK/NACK merging and unnecessary ACK/NACK feedback information transmission as far as possible so as to improve the transmission reliability of the ACK/NACK feedback information and the retransmission efficiency of the system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a device for transmitting ACK/NACK feedback information.
Background
For an LTE-a (Long Term Evolution Advanced) system, in order to support a system bandwidth wider than that of the LTE (Long Term Evolution ), such as 100MHz, one possibility is to directly allocate a spectrum with a bandwidth of 100M, as shown in fig. 1; one technology may be CA (Carrier Aggregation), that is, some frequency spectrums allocated to the existing system are aggregated to be supplied to the LTE-a multi-Carrier system as a large bandwidth, at this time, uplink and downlink carriers in the system may be configured asymmetrically, that is, a user may occupy N ≧ 1 carriers for downlink transmission and M ≧ 1 carriers for uplink transmission, as shown in fig. 2.
At present, an LTE-a system determines that at most 5 carriers can be supported for aggregation, and one LTE-a UE (User Equipment, i.e. terminal Equipment) needs to feed back ACK (Acknowledgement)/NACK (Negative Acknowledgement) feedback information corresponding to multiple downlink carriers and downlink subframes in the same uplink subframe. In the LTE-a system, the downlink carrier configured/aggregated by the UE may be activated or deactivated through a higher layer signaling, for example, through a MAC (Medium Access Control) signaling. Because a period of validity is required in the reconfiguration process of the high-level signaling, in the period of validity, because different UEs have different processing capabilities, the activation/deactivation effective time lengths of the different UEs are different, and the base station cannot judge when the activation/deactivation operation of the UE configuration carrier takes effect, and if the number of ACK/NACK feedback bits is determined according to the number of activated carriers, due to the fuzzy period in the activation/deactivation process of the carriers, the understanding of the number of activated carriers by the UE and the base station is inconsistent, and the understanding of the number of ACK/NACK feedback bits by the UE and the base station is inconsistent, so that the base station cannot correctly receive the ACK/NACK feedback of the UE. Therefore, in the LTE-a Rel-10 system, the bit number of the ACK/NACK feedback information fed back by the UE is determined according to the number of downlink carriers configured by the UE, and is specifically described as follows.
For an FDD (Frequency Division Duplex) system, the number of bits of ACK/NACK feedback information that the UE needs to feed back in one uplink subframe is equal toN + N 0WhereinNthe number of downlink carriers configured for the UE,N 0the number of downlink carriers for which the transmission mode is a multiple codeword (2 codewords).
For a TDD (Time Division Duplex) system, the number of ACK/NACK feedback information bits that the UE needs to feed back in one uplink subframe is equal toM（N + N 0) WhereinMthe number of downlink sub-frames for performing ACK/NACK feedback on each downlink carrier corresponding to one uplink sub-frame,Mdifferent values of the uplink subframes and different uplink and downlink configurations are different, that is, the total number of downlink subframes in the downlink subframe set corresponding to each uplink subframe shown in table 1. In particular, it is not counted for the special downlink subframes of the uplink and downlink configurations 0 and 5 under the normal CP (Cyclic Prefix) and the uplink and downlink configurations 0 and 4 under the extended CP, i.e. it is not counted inMThe subframe may not be included, and the UE does not feed back ACK/NACK feedback information for the subframe.
TABLE 1 Downlink association set index
for TDD
An ACK/NACK Multiplexing transmission scheme on a PUCCH (Physical Uplink Control Channel) determined in the LTE-a system is PUCCH format 1b (PUCCH format 1b with Channel selection) and PUCCH format3 with Channel selection, where a maximum transmission bit number of the PUCCH format 1b with Channel selection transmission scheme is 4 bits, and a maximum transmission bit number of the PUCCH format3 transmission scheme is 20 bits.
And the base station configures which transmission scheme is specifically adopted by the UE to transmit the ACK/NACK feedback information through signaling. When the bit number of the ACK/NACK feedback information of the UE exceeds the transmission capacity of the configuration scheme, the ACK/NACK feedback information needs to be merged, including spatial merging (spatial merging), time-domain merging (time-domain merging), and other merging manners, so that the bit number of the feedback information is limited not to exceed the transmission capacity. The PUCCH format3 scheme adopts different coding modes for the bit number of different ACK/NACK feedback information, when the bit number of the ACK/NACK feedback information does not exceed 11 bits, an RM (Reed Muller) coding mode is adopted, namely, the RM (32, O) + repetition (repetition) coding mode of a Rel-8 system is reused to code the ACK/NACK feedback information into 48-bit coded bits (coded bits), and the coded bits are transmitted in 2 time slots; when the bit number of the ACK/NACK feedback information exceeds 11 bits but not more than 20 bits, a Dual-RM (Dual RM) coding mode is adopted, the ACK/NACK feedback information is divided into 2 groups, each group encodes the ACK/NACK feedback information into 24-bit coded bits by adopting an RM (32, O) + truncation (truncation) coding mode, and the 24-bit coded bits are transmitted in 2 time slots respectively.
For the PUCCH format3 scheme, the transmission performance of ACK/NACK feedback information of different coding schemes is different, and the larger the bit number of the ACK/NACK feedback information is, the smaller the coding gain is, and the worse the transmission performance of the ACK/NACK feedback information is. Furthermore, combining the ACK/NACK feedback information will cause unnecessary retransmissions, thereby affecting the system throughput. When the UE is not in the carrier activation/deactivation mode period, the UE only receives data on the activated downlink carrier, and if the feedback of the ACK/NACK feedback information is always performed according to the number of configured/aggregated downlink carriers, the UE needs to generate at least 1-bit NACK for the downlink carrier that does not receive the data (for example, the deactivated downlink carrier in the configured downlink carrier) as the feedback information, thereby increasing the amount of unnecessary ACK/NACK feedback information, possibly introducing an ACK/NACK feedback information combining operation, reducing the transmission effectiveness of the ACK/NACK feedback information, increasing unnecessary system retransmission, or because the bit number of the feedback information is large, the PUCCH format3 needs to adopt Dual RM coding, and reducing the transmission performance of the ACK/NACK feedback information.
In addition, the higher layer signaling, for example, RRC (Radio Resource Control) signaling, may reconfigure the downlink carrier configured/aggregated by the UE, for example, add one or more downlink carriers, or reduce one or more downlink carriers. Currently defined when the UE is in a subframenAfter correctly receiving the carrier reconfiguration signaling, the carrier reconfiguration operation of the UE needs to be no later thann+15 subframe complete, in subframes n tonIn the period of +15, because different UEs have different processing capabilities, the reconfiguration effective time lengths of the different UEs are different, the base station cannot determine when the carrier reconfiguration operation for the UE is effective, and the base station and the UE may also have inconsistent understanding of the number of downlink carriers configured for the UE, which may also result in inconsistent understanding of the number of bits of the ACK/NACK feedback information by the UE and the base station, and thus, the base station may not correctly receive the ACK/NACK feedback of the UE.
In implementing the embodiments of the present invention, the applicant finds that the prior art has at least the following problems:
in an LTE-A system, if the bit number of ACK/NACK feedback information is always determined according to the number of downlink carriers configured/aggregated by UE, when the number of downlink carriers activated by the UE is less than the number of the configured/aggregated downlink carriers, the bit number of unnecessary ACK/NACK feedback information is increased, so that the ACK/NACK feedback information is merged, the transmission effectiveness of the ACK/NACK feedback information is reduced, unnecessary system retransmission is increased, or the coding gain is reduced due to the fact that the bit number of the ACK/NACK feedback information is larger, and the transmission performance of the ACK/NACK feedback information is further reduced.
Disclosure of Invention
The embodiment of the invention provides a method and equipment for transmitting ACK/NACK feedback information, which solve the problem of inaccurate ACK/NACK feedback information caused by the difference of understanding of the terminal equipment and a base station on the number of currently effective activated downlink carriers.
In order to achieve the above object, an aspect of the embodiments of the present invention provides a method for transmitting ACK/NACK feedback information, including:
when the terminal equipment is in the downlink sub-framenWhen the carrier configuration information sent by the base station is correctly received, the terminal equipment is in a subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, determining ACK/NACK feedback information according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information;
the terminal equipment sends the ACK/NACK feedback information to the base station;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
On the other hand, an embodiment of the present invention further provides a terminal device, including:
the receiving module is used for receiving carrier configuration information sent by a base station;
a generating module for generating a downlink subframe when the receiving module is in a downlink subframenWhen the carrier configuration information sent by the base station is correctly received, in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, determining ACK/NACK feedback information according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information;
a sending module, configured to send the ACK/NACK feedback information generated by the generating module to the base station;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
On the other hand, the embodiment of the invention also provides a transmission method of the ACK/NACK feedback information, which comprises the following steps:
base station in downlink subframenSending carrier configuration information to the terminal equipment;
the base station is in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe configured activated downlink carrier of the terminal equipment receives ACK/NACK feedback information sent by the terminal equipment, and the ACK/NACK feedback information is transmitted in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, receiving ACK/NACK feedback information sent by the terminal equipment according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
On the other hand, an embodiment of the present invention further provides a base station, including:
a sending module for downlink sub-framenSending carrier configuration information to the terminal equipment;
a receiving module forIn sub-framen+xIn the previous uplink subframe, according to the downlink subframenThe configured activated downlink carrier of the terminal equipment receives ACK/NACK feedback information sent by the terminal equipment, and the ACK/NACK feedback information is transmitted in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, receiving ACK/NACK feedback information sent by the terminal equipment according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information.
Compared with the prior art, the embodiment of the invention has the following advantages:
by applying the technical scheme of the embodiment of the invention, in an LTE-A system, when carrier configuration information is correctly received, terminal equipment and a base station confirm the effective time point of the carrier configuration information according to definition to distinguish the generation and transmission strategies of ACK/NACK feedback information, thereby avoiding the understanding difference of the terminal equipment and the base station on the bit number of the ACK/NACK feedback information, reducing ACK/NACK combination and unnecessary ACK/NACK feedback information transmission as much as possible, and improving the transmission reliability of the ACK/NACK feedback information and the retransmission efficiency of the system.
Drawings
FIG. 1 is a diagram of a prior art single spectrum system;
FIG. 2 is a schematic diagram of a prior art spectral polymerization system;
fig. 3 is a flowchart illustrating a method for transmitting ACK/NACK feedback information according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a method for transmitting ACK/NACK feedback information at a base station according to an embodiment of the present invention;
fig. 5 is a diagram illustrating an ACK/NACK feedback correspondence relationship of downlink configuration 2 in a TDD system according to a first embodiment of the present invention;
fig. 6 is a schematic diagram of determined ACK/NACK feedback information according to a first embodiment of the present invention;
fig. 7 is a diagram illustrating another determined ACK/NACK feedback information according to an embodiment of the present invention;
fig. 8 is a schematic diagram of determined ACK/NACK feedback information according to a first embodiment of the present invention;
fig. 9 is a diagram illustrating another determined ACK/NACK feedback information according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
As described in the background art, for a terminal device with CA capability in an LTE-a system, when a base station activates/deactivates an aggregated carrier of the terminal device through a high-layer signaling, since a period of validity is required for a reconfiguration process of the high-layer signaling, and in the period of validity, the base station cannot determine whether activation/deactivation of the aggregated carrier of the terminal device by the high layer is valid, there may be a case where understanding of the current number of activated carriers by the terminal device and the base station is inconsistent.
At present, the bit number of ACK/NACK feedback information defined in the standard is determined according to the number of carriers configured by the terminal device, and when the number of actually activated carriers of the terminal device is smaller than the number of configured carriers, the bit number of the ACK/NACK feedback information determined by the method is larger than the actually required feedback bit number, thereby affecting the transmission performance of the ACK/NACK feedback information.
Based on the above reasons, the embodiment of the invention provides a transmission method of ACK/NACK feedback information, which determines the bit number of the ACK/NACK feedback information according to the number of activated carriers, and improves the transmission reliability and the system retransmission efficiency of the ACK/NACK feedback information on the basis of avoiding the inconsistency of the terminal equipment and the base station in understanding the current number of activated carriers.
As shown in fig. 3, a schematic flow chart of a method for transmitting ACK/NACK feedback information according to an embodiment of the present invention is provided, where the method specifically includes the following steps:
step S301, when the terminal equipment is in the downlink sub-framenWhen the carrier configuration information sent by the base station is correctly received, the terminal equipment is in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, determining ACK/NACK feedback information according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information.
Wherein,xthe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
It should be noted that it is preferable to provide,xthe fixed value which is predefined according to actual needs in the system can be the same value for all terminal devices; or in order to increase the flexibility of the system,xit may also be a value signaled by higher layer signaling, e.g., MAC, RRC, or PDCCH signaling.
It should be noted that, in an actual application scenario, the carrier configuration information specifically includes one or more of the following information:
a carrier activation message;
a carrier deactivation message;
a carrier reconfiguration message.
Further, the carrier configuration information is, specifically, carrier configuration information sent by the base station through a higher layer signaling received by the terminal device, where the higher layer signaling is, specifically, MAC or RRC signaling.
In sub-frame for the terminal device in step S301n+xIn the previous uplink subframe, according to the downlink subframenThe processing procedure for determining the ACK/NACK feedback information by activating the downlink carrier of the terminal device may be divided into the following two cases according to the specific content of the carrier configuration information.
In case one, when the carrier configuration information is a carrier activation message and/or a carrier reconfiguration message, the terminal device is in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xAnd in the internal uplink subframe, giving up generating ACK/NACK feedback information for the newly added activated downlink carrier configured by the carrier activation message.
Wherein,kthe length of time for which the carrier configuration information of the terminal device itself is valid,k≤x。
it should be noted that even in the sub-framen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the internal uplink sub-frame, the carrier activation message for the terminal equipment is processed at the terminal equipment side, that is, the downlink carrier corresponding to the carrier activation message is activated, but because the base station cannot know the time point at which the carrier activation message at the terminal equipment side actually takes effect, the base station and the terminal equipment are prevented from being in the sub-framen+kTo the sub-framen+xThere is no understanding of the ACK/NACK feedback bit number, and during this time, the terminal device still only processes the sub-framenAnd the former activated downlink carrier generates ACK/NACK feedback information, and the new activated downlink carrier is not generated ACK/NACK feedback information.
And in case II, when the carrier configuration information is a carrier deactivation message and/or a carrier reconfiguration message, the terminal equipment is in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the inner uplink subframe, NACK information is generated for the original activated downlink carrier configured by the carrier deactivation message as ACK/NACK feedback information.
Wherein,kthe length of time for which the carrier configuration information of the terminal device itself is valid,k≤x。
it should be noted that even in the sub-framen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the internal uplink subframe, the carrier deactivation message of the terminal device is processed at the terminal device side, that is, the downlink carrier corresponding to the carrier deactivation message is deactivated, but the base station cannot know the time point at which the carrier deactivation message at the terminal device side actually takes effect, so as to avoid the base station and the terminal device from being in the subframen+kTo the sub-framen+xThe understanding of the ACK/NACK feedback bit number is inconsistent, during this period, the terminal device still needs to generate ACK/NACK feedback information for the activated downlink carrier before the subframe n, that is, the terminal device also needs to generate ACK/NACK feedback information for the currently deactivated downlink carrier among the originally activated downlink carriers, and the UE may generate NACK as feedback information for the activated downlink carrier according to the transmission mode of the downlink carrier.
In addition, the above description is givenkThe value is not necessarily the same for different terminal devices and is related to the processing capacity of the terminal device itself.
In practical application scenarios, the above-mentionedxThe size of (c) can be divided into the following cases according to the specific content of the carrier configuration information and the system type.
In case one, the carrier configuration information is a carrier activation message and/or a carrier deactivation message.
For a FDD system, it is preferred that,xthe size of (a) is specifically 8;
for a TDD system, the number of active terminals is,xis specifically the downlink subframenThe sum of the number of the subframes separated from the corresponding uplink subframes for feedback and the predefined processing delay in the TDD system.
Preferably, for a TDD system,xis specifically as followsk+4, whereinkFor downlink sub-framenSpaced from corresponding uplink sub-frame for feedbackThe number of subframes is shown in Table 1 in the background.
And in case two, the carrier configuration information is a carrier reconfiguration message.
For either an FDD system or a TDD system,xis specifically 15.
Step S302, the terminal equipment sends ACK/NACK feedback information to the base station.
Specifically, according to the difference of the sending modes of the ACK/NACK feedback information, the step includes the following two situations:
situation one, terminal equipment sends ACK/NACK feedback information to base station through PUCCH
And in case two, the terminal equipment sends ACK/NACK feedback information to the base station through a PUSCH.
Further, with respect to the situation in step S301, the technical solution proposed in the embodiment of the present invention further includes:
when the terminal equipment is in the downlink sub-framenAnd when the carrier configuration information sent by the base station is received in the medium error mode or the carrier configuration information sent by the base station is not received, the terminal equipment determines ACK/NACK feedback information according to the activated downlink carrier of the current terminal equipment.
It should be noted that, when the decoding of the carrier configuration information received by the terminal device is incorrect, the terminal device may generate NACK for the configuration information as feedback information and feed back the NACK to the base station, after the base station correctly receives the feedback information, it will be determined that the transmission of the carrier configuration information is failed this time, if it is also necessary to configure the carrier of the terminal device, it is necessary to resend the carrier configuration information, the terminal device receives the carrier configuration information again, until the carrier configuration information is correctly received, that is, when ACK is fed back to the base station, the terminal device may determine the generation and transmission strategy of ACK/NACK according to the above timing mode with the number of the downlink subframe that correctly receives the carrier configuration information as the above n value, otherwise, the terminal device does not start the above timing mode, and always determines ACK/NACK feedback information according to the original activated carrier of the terminal device.
The above processing procedure is a processing procedure of the method proposed by the embodiment of the present invention on the terminal device side, and correspondingly, the embodiment of the present invention further provides a processing procedure of the technical scheme on the base station side, and a flow diagram thereof is shown in fig. 4, and specifically includes the following steps:
step S401, the base station is in the downlink sub-framenAnd sending the carrier configuration information to the terminal equipment.
For a detailed description of the carrier configuration information, refer to step S301, and a description thereof is not repeated here.
Step S402, the base station is in the sub-framen+xIn the past, the scheduling of data transmission in the downlink carrier with the activation state change corresponding to the carrier configuration information is abandoned, and the data transmission is carried out in the subframen+xAnd sub-framen+xAnd then, the base station carries out scheduling of data transmission in the activated downlink carrier corresponding to the carrier configuration information.
Wherein,xis a value determined by the base station according to the conditions of the current system,xthe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
It should be noted that, when the terminal device receives the carrier configuration information with decoding error, the terminal device will generate NACK for the configuration information as feedback information, and feeds back the information to the base station, after the base station correctly receives the feedback information, the base station confirms that the transmission of the carrier configuration information fails, if the carrier of the terminal equipment needs to be configured, the carrier configuration information needs to be sent again until the ACK feedback information corresponding to the carrier configuration information fed back by the terminal equipment is received, the base station confirms that the terminal equipment correctly receives the carrier reconfiguration information, the downlink subframe number correctly sent by the carrier reconfiguration information is the value n, and determining the generation and transmission strategy of the ACK/NACK according to the timing mode, otherwise, the base station does not start the timing mode, and always determines the ACK/NACK feedback information according to the original activated carrier of the terminal equipment.
Further, the operation process of abandoning the scheduling of data transmission in the downlink carrier with the changed activation state corresponding to the carrier configuration information in this step includes the following two situations according to the content difference of the carrier configuration information:
in case one, when the carrier configuration information is a carrier activation message and/or a carrier reconfiguration message for activating a downlink carrier is added, the base station performs a process in a subframen+xAnd before, abandoning the scheduling of data transmission in the newly added activated downlink carrier corresponding to the carrier configuration information.
And in case II, when the carrier configuration information is a carrier deactivation message and/or a carrier reconfiguration message for reducing the activated downlink carrier, the base station performs the operation in the subframen+xAnd before, abandoning the scheduling of data transmission in the reduced activated downlink carrier corresponding to the carrier configuration information.
Step S403, the base station is in the subframen+xBefore, according to the downlink subframenActivating downlink carrier waves of the configured terminal equipment, receiving ACK/NACK feedback information sent by the terminal equipment, and sending the ACK/NACK feedback information to the terminal equipment in a subframen+xAnd sub-framen+xAnd then, receiving ACK/NACK feedback information sent by the terminal equipment according to the activated downlink carrier corresponding to the carrier configuration information.
Corresponding to step S402, the processing procedure in this step also includes the following two cases according to the difference of the ACK/NACK feedback information transmission modes:
in case one, the base station receives ACK/NACK feedback information sent by the terminal equipment through a PUCCH.
And in case two, the base station receives the ACK/NACK feedback information sent by the terminal equipment through the PUSCH.
Compared with the prior art, the embodiment of the invention has the following advantages:
by applying the technical scheme of the embodiment of the invention, in an LTE-A system, when carrier configuration information is correctly received, terminal equipment and a base station confirm the effective time point of the carrier configuration information according to definition to distinguish the generation and transmission strategies of ACK/NACK feedback information, thereby avoiding the understanding difference of the terminal equipment and the base station on the bit number of the ACK/NACK feedback information, reducing ACK/NACK combination and unnecessary ACK/NACK feedback information transmission as much as possible, and improving the transmission reliability of the ACK/NACK feedback information and the retransmission efficiency of the system.
The technical solution proposed in the embodiment of the present invention is described below with reference to specific application scenarios.
Embodiment one, a TDD system.
Assuming that the uplink and downlink configurations of the TDD system are the configuration 2 shown in table 1, where M =4, that is, the number of downlink subframes for performing ACK/NACK feedback on one uplink subframe on each downlink carrier is 4, a specific ACK/NACK feedback correspondence relationship is shown in fig. 5.
Downlink carrier 1 is a downlink main carrier, the UE configures 5 downlink carriers, there are 3 downlink carriers in an active state, the downlink carriers are downlink carriers 1, 2 and 3, the downlink carriers 1, 2, 3 and 4 are in a single codeword transmission mode, the downlink carrier 5 is in a multiple codeword transmission mode, the UE is configured to transmit ACK/NACK feedback information by using PUCCH format3, and in different scenarios, the specific processing mode is as follows:
scene one, downlink subframe of UE in radio frame Fn=4 receive activation configuration information for downlink carrier 4.
The UE end: setting the effective time of the UE carrier activation configuration ask=10, i.e. the UE is in a subframen+k=14 (i.e. subframe 4 in radio frame F + 1) activation of downlink carrier 4 is in effect; due to downlink sub-frame in radio frame FnACK/NACK feedback information of =4 is fed back in uplink subframe 2 in the next radio frame F +1, i.e. it is a new ACK/NACK feedback informationk1=8, setting the predefined processing time delay of the systemk2=4, i.e.x=k1+ k2=8+4=12, in sub-framen+xWith =4+12=16 (i.e. subframe 6 in the next radio frame F + 1) as the demarcation point, the UE specifically behaves as follows:
(1) although the UE is in the sub-framen+k=14 to subframen+x=16, its downlink carrier 4 is already activated, but since the base station cannot determine the specific valid subframe of UE end downlink carrier 4 activation, the base station is in the subframen=4 to subframen+x=16 no scheduling of data transmission on downlink carrier 4, UE in subframen+x=16 uplink subframe (i.e. uplink subframe preceding subframe 6 in radio frame F + 1), e.g. uplink subframe 2 in radio frame F +1, may always be according to subframenThe activated downlink carriers before the number of the active downlink carriers is =4 (i.e., downlink carriers 1, 2, and 3) determine ACK/NACK feedback information, that is, the UE generates ACK/NACK feedback information only for the downlink carriers 1, 2, and 3, and according to the transmission mode of the 3 activated downlink carriers, determine that the bit number of the ACK/NACK feedback information is 4+4+4=12, which is smaller than the maximum capacity of format3, and does not need to perform spatial combining, and generate NACK as feedback information for subframes where data is not received or packet loss is determined on the downlink carriers 1, 2, and 3, as shown in fig. 6, the 12-bit feedback information is sent to the base station by using a Dual-RM coding scheme.
(2) In sub-framen+x=16 and subframen+xIn an uplink subframe after =16 (i.e. subframe 6 in radio frame F +1 and an uplink subframe after subframe 6), for example, uplink subframe 7 in radio frame F +1 or uplink subframe 2 in radio frame F +2, taking uplink subframe 2 in radio frame F +2 as an example, since the uplink subframe is an uplink subframe after carrier activation validation time agreed by the system, a plurality of downlink subframes for performing ACK/NACK feedback in the uplink subframe may also include subframesn+x=16 and in subframesn+xFor example, downlink subframe 8 in radio frame F +1 after =16, the base station may schedule data transmission on downlink carrier 4 in these downlink subframes, and in order to avoid inconsistency between the base station and the UE in understanding the bit number of the ACK/NACK feedback information, the UE needs to determine ACK/NACK feedback information according to activated downlink carriers (i.e., downlink carriers 1, 2, 3, and 4) after carrier configuration information is configured, that is, the UE needs to determine ACK/NACK feedback information, that is, downlink carrier 8 in radio frame F +1The UE generates ACK/NACK feedback information only for downlink carriers 1, 2, 3, and 4, and determines that the bit number of the ACK/NACK feedback information is 4+4+4+4=16 and is smaller than the maximum capacity of format3 according to the transmission mode of the 4 activated downlink carriers, without performing spatial combination, and generates NACK as feedback information for subframes where no data is received or packet loss is determined on downlink carriers 1, 2, 3, and 4, and sends 16-bit feedback information to the base station by using a Dual-RM coding method as shown in fig. 7.
A base station end: downlink subframe in radio frame Fn=4 sending activation information for downlink carrier 4 to UE, but base station cannot determine the actual effective subframe position of UE end downlink carrier 4 activation, so base station is in subframen+xNo data transmission is scheduled on downlink carrier 4 until = 16; the base station determines according to the mode of the same UE endk1=8，k2=4, i.e.x=k1+k2=8+4=12, in subframesn+xWith =4+12=16 (i.e. subframe 6 in the next radio frame F + 1) as the demarcation point, the base station specifically acts as follows:
(1) in sub-framen+x=16 previous uplink subframe (i.e. uplink subframe before subframe 6 in radio frame F + 1), e.g. uplink subframe 2 in radio frame F +1, the base station determines ACK/NACK feedback information for UE transmission according to subframenAnd determining activated downlink carriers (namely downlink carriers 1, 2 and 3) before the activation of the uplink carrier number of the.
(2) In sub-framen+x=16 and subframen+x=16 uplink subframes (i.e. subframe 6 in radio frame F +1 and uplink subframe after subframe 6), for example, uplink subframe 7 in radio frame F +1 or uplink subframe 2 in radio frame F +2, the base station determines that the ACK/NACK feedback bit for UE transmission is determined according to the activated downlink carriers (i.e. downlink carriers 1, 2, 3, 4) configured by the carrier configuration information, i.e. the UE generates ACK/NACK information only for downlink carriers 1, 2, 3, 4, the ACK/NACK feedback bit number is 4+4+4+4=16, which is smaller than the maximum capacity of format3,and (4) no space combination is performed, and 16-bit feedback information is received by adopting a Dual-RM decoding mode.
It should be noted that, in the above process, the base station does not schedule any data transmission on the downlink carrier 4 before it is uncertain whether the activation operation of the downlink carrier 4 is valid, so that in the above method, there is no ambiguity in understanding the ACK/NACK feedback information by the UE and the base station, and merging of ACK/NACK is avoided (if the ACK/NACK feedback bit number is determined based on the configured downlink carrier, 4+4+4+8=24 bits need to be fed back, and more than 20 bits need to be merged), so that the ACK/NACK transmission effectiveness is improved.
Scene two, downlink subframe of UE in wireless frame Fn=5 receive deactivation configuration information for downlink carrier 3.
The UE end: setting the effective time of UE carrier deactivation configuration ask=10, i.e. the UE is in a subframen+k=15 (i.e. subframe 5 in radio frame F + 1) deactivation of downlink carrier 3 is in effect; due to downlink sub-frame in radio frame FnACK/NACK feedback information of =5 is fed back in uplink subframe 2 in the next radio frame F +1, i.e. it is a new ACK/NACK feedback informationk1=7, and setting the predefined processing time delay of the systemk2=4, i.e.x=k1+k2=7+4=11, in subframesn+xWith =5+11=16 (i.e. subframe 6 in the next radio frame F + 1) as the demarcation point, the UE specifically behaves as follows:
(1) although the UE is in the sub-framen+k=15 to subframen+x=16, its downlink carrier 3 has been deactivated, but since the base station cannot determine the specific effective subframe where the downlink carrier 3 is deactivated at the UE end, in order to avoid the subframe where the downlink carrier 3 is deactivatedn+kTo the sub-framen+xThe base station and the UE have inconsistent understanding of ACK/NACK feedback bit number, and the UE is in a subframen+x=16 uplink subframes (i.e. uplink subframes before subframe 6 in radio frame F + 1), e.g. uplink subframe 2 in radio frame F +1, always according to subframen= activation of downlink carrier before 5 (i.e. downlink carrier 1, 2, 3) ACK/NACK feedback bit is determined, i.e. UE always generates ACK/NACK information for downlink carrier 1, 2, 3 and according to transmission mode of these 3 downlink carriersDetermining that the ACK/NACK feedback bit number is 4+4+4=12 and is smaller than the maximum capacity of format3, generating NACK as feedback information for subframes which do not receive data or judge packet loss on downlink carriers 1, 2 and 3 without spatial combination, and generating NACK as feedback information for downlink carrier 3 in subframen+kTo the sub-framen+xWhen the UE is deactivated, the UE generates NACK as feedback information according to the transmission mode in the original activated state, and sends 12-bit feedback information to the base station by using a Dual-RM coding method as shown in fig. 8.
(2) In sub-framen+x=16 and subframen+xIn an uplink subframe after =16 (i.e. subframe 6 in radio frame F +1 and uplink subframe after subframe 6), for example, uplink subframe 7 in radio frame F +1 or uplink subframe 2 in radio frame F +2, taking uplink subframe 2 in radio frame F +2 as an example, since the uplink subframe is an uplink subframe after carrier deactivation validation time agreed by the system, the base station will only schedule data transmission on the existing active carrier, so the UE can determine ACK/NACK feedback bits according to the active downlink carriers (i.e. downlink carriers 1 and 2) configured by the carrier configuration information, i.e. the UE generates ACK/NACK information only for downlink carriers 1 and 2, and determines that the ACK/NACK feedback bits are 4+4=8 according to the transmission modes of the 2 active downlink carriers, and are smaller than the maximum capacity of format3, and do not need spatial combination, and perform spatial combination on downlink carrier 1 and 2, 2, generating NACK as feedback information in the subframe where no data is received or packet loss is determined, and sending 8-bit feedback information to the base station by using an RM coding method as shown in fig. 9.
A base station end: downlink subframe in radio frame Fn=5 sending deactivation information of downlink carrier 3 to the UE, but the base station cannot determine the actual effective subframe position of deactivation of downlink carrier 3 at the UE end; since the base station wishes to deactivate downlink carrier 3, in a subframen=5 starts, the base station does not schedule any data transmission on downlink carrier 3; the base station determines according to the mode of the same UE endk1=7，k2=4, i.e.x=k1+k2=7+4=11, in subframesn+xWith =5+11=16 (i.e. subframe 6 in the next radio frame F + 1) as the demarcation point, the base station specifically acts as follows:
(1) in sub-framen+x=16 previous uplink subframe (i.e. uplink subframe before subframe 6 in radio frame F + 1), e.g. uplink subframe 2 in radio frame F +1, the base station determines ACK/NACK feedback information for UE transmission according to subframenDetermining activated downlink carriers (namely downlink carriers 1, 2 and 3) before the activation of the uplink carrier number of the UE is 5, namely determining that the UE always feeds back ACK/NACK information to the downlink carriers 1, 2 and 3, wherein the ACK/NACK feedback bit number is 4+4+4=12, no space combination is performed, and 12-bit feedback information is received by adopting a Dual-RM decoding mode; in addition, the base station may reduce the number of detections according to a priori information (for example, there is no scheduling on the downlink carrier 3, so its feedback information is NACK).
(2) In sub-framen+x=16 and subframen+xIn an uplink subframe after =16 (i.e. subframe 6 in radio frame F +1 and an uplink subframe after subframe 6), for example, uplink subframe 7 in radio frame F +1 or uplink subframe 2 in radio frame F +2, the base station determines that an ACK/NACK feedback bit transmitted by the UE is determined according to an activated downlink carrier (i.e. downlink carrier 1, 2) configured by the carrier configuration information, that is, the UE generates ACK/NACK information only for downlink carrier 1, 2, where the ACK/NACK feedback bit number is 4+4=8 and is smaller than the maximum capacity of the format3, there is no spatial combination, and an RM decoding method is used to receive 8-bit feedback information.
It should be noted that, in the above process, after the base station sends the deactivation command to the downlink carrier 3, no data transmission is scheduled on the downlink carrier 3, so that in the above method, the UE and the base station do not have ambiguity in understanding the ACK/NACK feedback information, and merging of ACK/NACK is avoided (if the ACK/NACK feedback bit number is determined based on the configured downlink carrier, 4+4+4+8=24 bits need to be fed back, more than 20 bits need to be merged, and a Dual-RM coding mode needs to be adopted, so that the ACK/NACK transmission performance and efficiency are both reduced), thereby improving the ACK/NACK transmission effectiveness and reliability (ACK/NACK is transmitted by using RM coding after the downlink carrier 3 is deactivated).
Embodiment two, FDD system.
In the first embodiment, when M =1, the method is applicable to an FDD system, and is not described herein again.
Compared with the prior art, the embodiment of the invention has the following advantages:
by applying the technical scheme of the embodiment of the invention, in an LTE-A system, when carrier configuration information is correctly received, terminal equipment and a base station confirm the effective time point of the carrier configuration information according to definition to distinguish the generation and transmission strategies of ACK/NACK feedback information, thereby avoiding the understanding difference of the terminal equipment and the base station on the bit number of the ACK/NACK feedback information, reducing ACK/NACK combination and unnecessary ACK/NACK feedback information transmission as much as possible, and improving the transmission reliability of the ACK/NACK feedback information and the retransmission efficiency of the system.
In order to implement the technical solution of the embodiment of the present invention, an embodiment of the present invention further provides a terminal device, a schematic structural diagram of which is shown in fig. 10, and the terminal device specifically includes:
a receiving module 101, configured to receive carrier configuration information sent by a base station;
a generating module 102, configured to generate a downlink subframe when the receiving module 101 is in the downlink subframenWhen the carrier configuration information sent by the base station is correctly received, in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, determining ACK/NACK feedback information according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information;
a sending module 103, configured to send the ACK/NACK feedback information generated by the generating module 102 to the base station.
Wherein,xthe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
In a specific application scenario, the generating module 102 is further configured to:
when the receiving module 101 is in the downlink sub-framenAnd when the carrier configuration information sent by the base station is received in the medium error mode or the carrier configuration information sent by the base station is not received, determining ACK/NACK feedback information according to the activated downlink carrier of the current terminal equipment.
On the other hand, the generating module 102 is specifically configured to:
when the carrier configuration information correctly received by the receiving module 101 is a carrier activation message and/or a carrier reconfiguration message, in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the inner uplink sub-frame, the ACK/NACK feedback information generated by the newly added activated downlink carrier wave configured by the carrier wave activation message is abandoned,kthe length of time for which the carrier configuration information of the terminal device itself is valid,k≤x；
when the carrier configuration information correctly received by the receiving module 101 is a carrier deactivation message and/or a carrier reconfiguration message, in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the inner uplink subframe, NACK information is generated for the original activated downlink carrier configured by the carrier deactivation message as ACK/NACK feedback information.
Further, the sending module 103 is specifically configured to:
and sending the ACK/NACK feedback information to the base station through PUCCH or PUSCH.
On the other hand, an embodiment of the present invention further provides a base station, a schematic structural diagram of which is shown in fig. 11, and the base station specifically includes:
a sending module 111, configured to send a downlink subframenSending carrier configuration information to the terminal equipment;
a receiving module 112 for receiving the subframen+xIn the previous uplink subframe, according to the downlink subframenActivation of previously configured terminal devicesThe active downlink carrier receives the ACK/NACK feedback information sent by the terminal equipment and is in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, activating a downlink carrier of the terminal equipment after the configuration according to the carrier configuration information, and receiving ACK/NACK feedback information sent by the terminal equipment.
In a specific implementation scenario, the receiving module 112 is specifically configured to:
in sub-framen+xIn the previous uplink subframe, according to the downlink subframenThe method comprises the steps that the activated downlink carrier of the configured terminal equipment determines the ACK/NACK feedback bit number, the ACK/NACK feedback information sent by the terminal equipment is received according to the ACK/NACK feedback bit number, and the ACK/NACK feedback information is determined to be in a downlink subframenFeedback information corresponding to activated downlink carrier of the configured terminal equipment in subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, determining an ACK/NACK feedback bit number according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information, receiving ACK/NACK feedback information sent by the terminal equipment according to the ACK/NACK feedback bit number, and determining the ACK/NACK feedback information as feedback information corresponding to the activated downlink carrier of the terminal equipment configured by the carrier configuration information.
Further, the base station further includes a scheduling module 113, configured to schedule downlink data transmission to the terminal device before the receiving module 112 receives the ACK/NACK feedback information sent by the terminal device, where the scheduling module includes:
when the carrier configuration information sent by the sending module 111 is a carrier activation message and/or a carrier reconfiguration message for activating a downlink carrier is added, in a subframen+xBefore, abandoning data transmission in the newly added activated downlink carrier corresponding to the carrier configuration information;
when the carrier configuration information sent by the sending module 111 is a carrier deactivation message and/or a carrier reconfiguration message that reduces activated downlink carriers, in a subframen+xForgoing reduced activated downlink carrier relay corresponding to carrier configuration informationAnd (6) transmitting the data.
Further, the receiving module 112 is specifically configured to receive, through a PUCCH or a PUSCH, ACK/NACK feedback information sent by the terminal device.
Compared with the prior art, the embodiment of the invention has the following advantages:
by applying the technical scheme of the embodiment of the invention, in an LTE-A system, when carrier configuration information is correctly received, terminal equipment and a base station confirm the effective time point of the carrier configuration information according to definition to distinguish the generation and transmission strategies of ACK/NACK feedback information, thereby avoiding the understanding difference of the terminal equipment and the base station on the bit number of the ACK/NACK feedback information, reducing ACK/NACK combination and unnecessary ACK/NACK feedback information transmission as much as possible, and improving the transmission reliability of the ACK/NACK feedback information and the retransmission efficiency of the system.
Through the above description of the embodiments, it is clear to those skilled in the art that the embodiments of the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various implementation scenarios of the embodiment of the present invention.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to implement embodiments of the present invention.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The sequence numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the implementation scenarios.
The above disclosure is only a few specific implementation scenarios of the embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be considered by those skilled in the art should fall within the scope of the business limitations of the embodiments of the present invention.
Claims (26)
1. A method for transmitting ACK/NACK feedback information, comprising:
when the terminal equipment is in the downlink sub-framenWhen the carrier configuration information sent by the base station is correctly received, the terminal equipment is in a subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, the uplink subframe is configured according to the carrier configuration informationActivating a downlink carrier of the terminal equipment to determine ACK/NACK feedback information;
the terminal equipment sends the ACK/NACK feedback information to the base station;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
2. The method of claim 1, further comprising:
when the terminal equipment is in a downlink subframenAnd when the carrier configuration information sent by the base station is received in a medium error mode or the carrier configuration information sent by the base station is not received, the terminal equipment determines ACK/NACK feedback information according to the activated downlink carrier of the current terminal equipment.
3. The method of claim 1, wherein the carrier configuration information specifically includes:
a carrier activation message; and/or the presence of a gas in the gas,
a carrier deactivation message; and/or the presence of a gas in the gas,
a carrier reconfiguration message.
4. The method of claim 3, wherein the carrier configuration information specifically is:
and the terminal equipment receives carrier configuration information sent by the base station through a high-level signaling.
5. The method of claim 4, wherein the higher layer signaling is specifically:
medium access control, MAC, signaling or radio resource control, RRC, signaling.
6. The method of claim 1, wherein said method is performed in a batch processThe terminal device is in the sub-framen+xIn the previous uplink subframe, according to the downlink subframenThe determining ACK/NACK feedback information by activating a downlink carrier of the terminal device specifically includes:
when the carrier configuration information is a carrier activation message and/or a carrier reconfiguration message, the terminal device is in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the internal uplink subframe, giving up generating ACK/NACK feedback information for the newly added activated downlink carrier wave configured by the carrier wave activation message, wherein the ACK/NACK feedback information is generated by the newly added activated downlink carrier wave configured by the carrier wave activation messagekConfiguring the effective time length of the information for the carrier of the terminal device,k≤x；
when the carrier configuration information is a carrier deactivation message and/or a carrier reconfiguration message, the terminal device is in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the internal uplink subframe, generating NACK information as ACK/NACK feedback information for the original activated downlink carrier configured by the carrier deactivation message, wherein the NACK information is generated by the original activated downlink carrierkConfiguring the effective time length of the information for the carrier of the terminal device,k≤x。
7. the method of claim 1, wherein when the carrier configuration information is a carrier activation message and/or a carrier deactivation message, the method further comprisesxThe method specifically comprises the following steps:
for FDD systems, thexThe size of (a) is specifically 8;
for a TDD system, thexIs specifically the downlink sub-framenAnd the sum of the number of the subframes spaced between the uplink subframes for performing ACK/NACK feedback and the predefined processing delay in the TDD system.
8. The method of claim 1, wherein when the carrier configuration information is a carrier reconfiguration message, the carrier configuration information is a carrier reconfiguration messagexThe method specifically comprises the following steps:
for FDD or TDD systems, thexIs specifically 15。
9. The method of claim 1, wherein the sending, by the terminal device, the ACK/NACK feedback information to the base station specifically comprises:
and the terminal equipment sends the ACK/NACK feedback information to the base station through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
10. A terminal device, comprising:
the receiving module is used for receiving carrier configuration information sent by a base station;
a generating module for generating a downlink subframe when the receiving module is in a downlink subframenWhen the carrier configuration information sent by the base station is correctly received, in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe activated downlink carrier of the terminal equipment determines ACK/NACK feedback information in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, determining ACK/NACK feedback information according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information;
a sending module, configured to send the ACK/NACK feedback information generated by the generating module to the base station;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
11. The terminal device of claim 10, wherein the generating module is further configured to:
when the receiving module is in the downlink subframenAnd when the carrier configuration information sent by the base station is received in a medium error mode or the carrier configuration information sent by the base station is not received, determining ACK/NACK feedback information according to the activated downlink carrier of the current terminal equipment.
12. The terminal device of claim 10, wherein the generating module is specifically configured to:
when the carrier configuration information correctly received by the receiving module is a carrier activation message and/or a carrier reconfiguration message, in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xIn the internal uplink subframe, giving up generating ACK/NACK feedback information for the newly added activated downlink carrier wave configured by the carrier wave activation message, wherein the ACK/NACK feedback information is generated by the newly added activated downlink carrier wave configured by the carrier wave activation messagekConfiguring the effective time length of the information for the carrier of the terminal device,k≤x；
when the carrier configuration information correctly received by the receiving module is a carrier deactivation message and/or a carrier reconfiguration message, in a subframen+kTo the sub-framen+xDoes not include sub-frame in betweenn+xAnd in the inner uplink subframe, generating NACK information as ACK/NACK feedback information for the original activated downlink carrier configured by the carrier deactivation message.
13. The terminal device of claim 10, wherein the sending module is specifically configured to:
and sending the ACK/NACK feedback information to the base station through PUCCH or PUSCH.
14. A method for transmitting ACK/NACK feedback information is characterized by comprising the following steps:
base station in downlink subframenSending carrier configuration information to the terminal equipment;
the base station is in the subframen+xIn the previous uplink subframe, according to the downlink subframenThe configured activated downlink carrier of the terminal equipment receives ACK/NACK feedback information sent by the terminal equipment, and the ACK/NACK feedback information is transmitted in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, the activated downlink carrier of the terminal equipment configured according to the carrier configuration information is received and sent by the terminal equipmentSending ACK/NACK feedback information;
wherein, thexThe size of the time delay is not less than the processing time delay of the terminal equipment for completing the carrier configuration operation, and is not less than the sum of the processing time delay of the terminal equipment for receiving and feeding back the carrier configuration information and the processing time delay of the base station for receiving and demodulating the feedback information.
15. The method of claim 14, wherein the carrier configuration information specifically includes:
a carrier activation message; and/or the presence of a gas in the gas,
a carrier deactivation message; and/or the presence of a gas in the gas,
a carrier reconfiguration message.
16. The method of claim 15, wherein the carrier configuration information specifically is:
and the base station transmits the carrier configuration information to the terminal equipment through a high-level signaling.
17. The method of claim 16, wherein the higher layer signaling is specifically:
MAC signaling or RRC signaling.
18. The method of claim 14, wherein the base station is in a subframen+xIn the previous uplink subframe, according to the downlink subframenThe configured activated downlink carrier of the terminal equipment receives ACK/NACK feedback information sent by the terminal equipment, and the ACK/NACK feedback information is transmitted in a subframen+xAnd sub-framen+xIn the subsequent uplink subframe, receiving ACK/NACK feedback information sent by the terminal device according to the activated downlink carrier of the terminal device configured by the carrier configuration information, specifically including:
the base station is in the subframen+xIn the previous uplink subframe, according to the downlink subframenPreviously configured activated download of the terminal deviceDetermining the ACK/NACK feedback bit number according to the wave, receiving ACK/NACK feedback information sent by the terminal equipment according to the ACK/NACK feedback bit number, and determining the ACK/NACK feedback information as that in the downlink subframenFeedback information corresponding to the activated downlink carrier of the terminal equipment configured before is in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, determining an ACK/NACK feedback bit number according to the activated downlink carrier of the terminal equipment after the carrier configuration information is configured, receiving ACK/NACK feedback information sent by the terminal equipment according to the ACK/NACK feedback bit number, and determining the ACK/NACK feedback information as feedback information corresponding to the activated downlink carrier of the terminal equipment after the carrier configuration information is configured.
19. The method of claim 14, wherein the base station schedules downlink data transmission to the terminal device before receiving the ACK/NACK feedback information sent by the terminal device, comprising:
when the carrier configuration information is a carrier activation message and/or a carrier reconfiguration message for activating a downlink carrier is added, the base station activates the downlink carrier in a subframen+xBefore, abandoning data transmission in the newly added activated downlink carrier corresponding to the carrier configuration information;
when the carrier configuration information is a carrier deactivation message and/or a carrier reconfiguration message for reducing the activated downlink carrier, the base station performs subframe allocation on the subframen+xAnd before, abandoning the data transmission in the reduced activated downlink carrier corresponding to the carrier configuration information.
20. The method of claim 14, wherein when the carrier configuration information is a carrier activation message and/or a carrier deactivation message, the method is performedxThe method specifically comprises the following steps:
for FDD systems, thexThe size of (a) is specifically 8;
for a TDD system, thexIs specifically the downlink sub-framenCorresponding ACK/NACAnd the sum of the number of the subframes at intervals between the uplink subframes fed back by the K and the processing delay predefined in the TDD system.
21. The method of claim 14, wherein when the carrier configuration information is a carrier reconfiguration message, the carrier configuration information is a carrier reconfiguration messagexThe method specifically comprises the following steps:
for FDD or TDD systems, thexIs specifically 15.
22. The method of claim 14, wherein the receiving, by the base station, the ACK/NACK feedback information sent by the terminal device specifically includes:
and the base station receives the ACK/NACK feedback information sent by the terminal equipment through a PUCCH or a PUSCH.
23. A base station, comprising:
a sending module for downlink sub-framenSending carrier configuration information to the terminal equipment;
a receiving module for receiving the sub-framen+xIn the previous uplink subframe, according to the downlink subframenThe configured activated downlink carrier of the terminal equipment receives ACK/NACK feedback information sent by the terminal equipment, and the ACK/NACK feedback information is transmitted in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, receiving ACK/NACK feedback information sent by the terminal equipment according to the activated downlink carrier of the terminal equipment configured by the carrier configuration information.
24. The base station of claim 23, wherein the receiving module is specifically configured to:
in sub-framen+xIn the previous uplink subframe, according to the downlink subframenDetermining the ACK/NACK feedback bit number according to the activated downlink carrier wave of the terminal equipment configured previously, receiving ACK/NACK feedback information sent by the terminal equipment according to the ACK/NACK feedback bit number, and determining the ACK/NACK feedbackInformation is in the downlink sub-framenFeedback information corresponding to the activated downlink carrier of the terminal equipment configured before is in a subframen+xAnd sub-framen+xAnd in the subsequent uplink subframe, determining an ACK/NACK feedback bit number according to the activated downlink carrier of the terminal equipment after the carrier configuration information is configured, receiving ACK/NACK feedback information sent by the terminal equipment according to the ACK/NACK feedback bit number, and determining the ACK/NACK feedback information as feedback information corresponding to the activated downlink carrier of the terminal equipment after the carrier configuration information is configured.
25. The base station of claim 23, further comprising a scheduling module, configured to schedule downlink data transmission to the terminal device before the receiving module receives the ACK/NACK feedback information sent by the terminal device, including:
when the carrier configuration information sent by the sending module is a carrier activation message and/or a carrier reconfiguration message for activating a downlink carrier is added, in a subframen+xBefore, abandoning data transmission in the newly added activated downlink carrier corresponding to the carrier configuration information;
when the carrier configuration information sent by the sending module is a carrier deactivation message and/or a carrier reconfiguration message for reducing the activated downlink carrier, in a subframen+xAnd before, abandoning the data transmission in the reduced activated downlink carrier corresponding to the carrier configuration information.
26. The base station of claim 23, wherein the receiving module is specifically configured to:
and receiving the ACK/NACK feedback information sent by the terminal equipment through a PUCCH or a PUSCH.
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