CN104579589B - Answer method, base station, terminal and system in TDD FDD systems - Google Patents
Answer method, base station, terminal and system in TDD FDD systems Download PDFInfo
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Abstract
The invention provides answer method, base station, terminal and the system in a kind of TDD FDD systems.This method includes：Using TDD ratio of uplink subframe to downlink subframe, determine that FDD A/N refers to ratio of uplink subframe to downlink subframe；In each sub-frame of uplink as defined in TDD ratio of uplink subframe to downlink subframe, the ACK/NACK responses of transmission/reception TDD downlink datas；Each sub-frame of uplink as defined in ratio of uplink subframe to downlink subframe, the A/N responses of transmission/reception FDD downlink datas are referred in FDD A/N；Wherein, the A/N acknowledgement bit information of TDD and FDD downlink data is carried in TDD control channel.The present invention when terminal supports the polymerization of TDD FDD systems united carrier, can realize ACK/NACK feedback.
Description
Technical Field
The present invention relates to communication technologies, and in particular, to a response method, a base station, a terminal, and a system in a Time-division duplex (TDD) -Frequency-division duplex (FDD) system.
Background
The LTE-a system proposes a technique of carrier aggregation. Carrier Aggregation (CA) is the Aggregation of 2 or more Carrier units (CCs) to support a larger transmission bandwidth (up to 100 MHz). When the terminal supports carrier aggregation, it is able to transmit and receive data through a plurality of carrier units at the same time, thereby implementing a larger transmission bandwidth.
In the Rel-10 protocol, carrier aggregation techniques are separately introduced for TDD and FDD, that is, a terminal may support aggregation of multiple carrier units of a TDD system standard or support aggregation of multiple carrier units of an FDD system standard.
In the new Rel-12 version protocol, a concept of TDD-FDD system joint carrier aggregation is further introduced, that is, when the terminal supports TDD-FDD system joint carrier aggregation, aggregation of multiple carrier units supported by the terminal includes both a carrier unit of a TDD system format and a carrier unit of an FDD system format, so that existing spectrum resources can be more fully utilized.
Both FDD system and TDD require the terminal to feed back the received downlink data, and when the downlink data is correctly received, an Acknowledgement (ACK) needs to be fed back; when the downlink data is not received correctly, a Negative-acknowledgement (NACK) needs to be fed back. However, in the FDD system and the TDD system, ACK/NACK is fed back in a different manner. In the FDD system, the terminal can transmit uplink data in every subframe, and thus, it is prescribed that ACK/NACK is transmitted in the first subframe after a predetermined time, for example, 4 ms. In the TDD system, subframes are divided into an uplink subframe and a downlink subframe, and a terminal can transmit uplink data only in the uplink subframe, so it is specified that ACK/NACK for uplink is transmitted in the first uplink subframe after a predetermined time, for example, 4 ms. When the terminal supports the TDD-FDD system joint carrier aggregation, it is necessary to simultaneously feed back an ACK/NACK response for TDD downlink data and an ACK/NACK response for FDD downlink data in one subframe. However, if the PUCCH is transmitted only in the primary cell, when TDD is used as the primary cell, the specified subframe for feeding back the ACK/NACK response of FDD downlink data is likely to be a downlink subframe of TDD system, that is, the ACK/NACK response of FDD downlink data cannot be fed back at the same time, which results in a conflict.
It can be seen that, in the prior art, when the terminal supports TDD-FDD system joint carrier aggregation, the feedback of ACK/NACK cannot be implemented.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a response method, a base station, a terminal and a system in a TDD-FDD system, which can realize the feedback of ACK/NACK when the terminal supports the combined carrier aggregation of the TDD-FDD system.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a TDD-FDD system unites the response method of the carrier aggregation, utilize the uplink and downlink subframe ratio of TDD, confirm the A/N of FDD consults the uplink and downlink subframe ratio, said method also comprises:
sending/receiving an A/N response of TDD downlink data according to the uplink and downlink subframe ratio of TDD in each uplink subframe specified by the uplink and downlink subframe ratio of TDD;
sending/receiving an A/N response of FDD downlink data according to the A/N reference uplink and downlink subframe ratio of FDD in each uplink subframe specified by the A/N reference uplink and downlink subframe ratio of FDD;
the A/N response bit information of the TDD and FDD downlink data is carried on the control channel of TDD.
The method further comprises the following steps:
sending/receiving TDD downlink data according to the uplink and downlink subframe ratio of TDD in each downlink subframe specified by the uplink and downlink subframe ratio of TDD; and transmitting/receiving FDD downlink data according to the A/N reference uplink and downlink subframe ratio of the FDD in each downlink subframe specified by the A/N reference uplink and downlink subframe ratio of the FDD.
When the terminal executes the response method of the TDD-FDD system combined carrier aggregation, the terminal executes the A/N response of sending TDD downlink data and the A/N response of FDD downlink data in each uplink subframe, and the terminal executes the receiving of the TDD downlink data and the FDD downlink data in each downlink subframe.
When the base station executes the response method of the TDD-FDD system combined carrier aggregation, the base station executes the A/N response for receiving TDD downlink data and the A/N response for FDD downlink data in each uplink subframe, and the base station executes the sending of the TDD downlink data and the FDD downlink data in each downlink subframe.
The determining the A/N reference uplink and downlink subframe ratio of the FDD by using the uplink and downlink subframe ratio of the TDD comprises the following steps:
and setting the A/N reference uplink and downlink subframe ratio of the FDD to be the same as the uplink and downlink subframe ratio of the currently used TDD.
The method further comprises the following steps: presetting a corresponding relation between a main and auxiliary carrier uplink and downlink configuration pair and a reference uplink and downlink subframe configuration;
the determining the A/N reference uplink and downlink subframe ratio of the FDD by using the uplink and downlink subframe ratio of the TDD comprises the following steps:
selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD; and taking the currently used uplink and downlink subframe ratio of the TDD as the uplink and downlink configuration of the main carrier, taking the virtual uplink and downlink subframe ratio of the FDD as the uplink and downlink configuration of the auxiliary carrier to form a main and auxiliary carrier uplink and downlink configuration pair, searching the reference uplink and downlink subframe configuration corresponding to the currently formed main and auxiliary carrier uplink and downlink configuration pair in the corresponding relation, and taking the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD.
And informing the terminal of the A/N reference uplink and downlink subframe ratio of the FDD through RRC signaling.
A base station, comprising:
an FDD subframe ratio determining unit, configured to determine an A/N reference uplink and downlink subframe ratio of FDD by using an uplink and downlink subframe ratio of TDD;
an uplink transceiving processing unit, configured to receive an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes in each specified uplink subframe in the ratio of the TDD uplink and downlink subframes, and receive an a/N response of the FDD downlink data according to a ratio of the FDD uplink and downlink subframes determined by the FDD subframe ratio determining unit; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
and a downlink transceiving processing unit, configured to send TDD downlink data in each downlink subframe specified by the TDD uplink/downlink subframe ratio, and send FDD downlink data according to each downlink subframe specified by the FDD a/N reference uplink/downlink subframe ratio determined by the FDD subframe ratio determining unit.
The FDD subframe proportioning unit comprises a first FDD configuration subunit and is used for setting the A/N reference uplink and downlink subframe proportioning of FDD to be the same as the uplink and downlink subframe proportioning of currently used TDD;
the base station further comprises: a configuration unit, configured to set a corresponding relationship between a primary and secondary carrier uplink and downlink configuration pair and a reference uplink and downlink subframe configuration;
the FDD subframe matching unit comprises a second FDD configuration subunit and is used for selecting one of multiple uplink and downlink subframe matching of TDD as the virtual uplink and downlink subframe matching of FDD; and taking the currently used uplink and downlink subframe ratio of the TDD as the uplink and downlink configuration of the main carrier, taking the virtual uplink and downlink subframe ratio of the FDD as the uplink and downlink configuration of the auxiliary carrier, forming a main and auxiliary carrier uplink and downlink configuration pair, searching the reference uplink and downlink subframe configuration corresponding to the currently formed main and auxiliary carrier uplink and downlink configuration pair in the corresponding relationship set by the configuration unit, and taking the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD.
Further comprising: and the informing unit informs the terminal of the A/N reference uplink and downlink subframe ratio of the FDD through RRC high-level signaling.
A terminal, comprising:
an FDD subframe ratio obtaining unit, configured to obtain an A/N reference uplink and downlink subframe ratio of FDD, and transmit the A/N reference uplink and downlink subframe ratio to an uplink interaction unit and a downlink interaction unit;
an uplink interaction unit, configured to send an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes to each specified uplink subframe, and send an a/N response of FDD downlink data according to a ratio of the FDD uplink and downlink subframes to each specified uplink subframe; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
and the downlink interaction unit is used for receiving the TDD downlink data according to the uplink and downlink subframe ratio of the TDD in each specified downlink subframe ratio of the uplink and downlink subframes of the TDD, and receiving the FDD downlink data according to the A/N reference uplink and downlink subframe ratio of the FDD in each specified downlink subframe ratio of the A/N reference uplink and downlink subframes of the FDD.
The FDD subframe ratio acquisition unit comprises a signal processing subunit and is used for receiving an RRC high-level signaling and analyzing the A/N reference uplink and downlink subframe ratio of the FDD from the high-level signaling.
The method for determining the A/N reference uplink and downlink subframe ratio of the FDD, which is obtained by the FDD subframe ratio obtaining unit, comprises the following steps: and setting the A/N reference uplink and downlink subframe ratio of the FDD to be the same as the uplink and downlink subframe ratio of the currently used TDD.
Or, the method for determining the ratio of the a/N reference uplink and downlink subframes of the FDD acquired by the FDD subframe ratio acquisition unit is as follows: selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD; the method comprises the steps of taking the ratio of uplink and downlink subframes of TDD currently used as the ratio of uplink and downlink of a main carrier, taking the ratio of virtual uplink and downlink subframes of FDD as the ratio of uplink and downlink subframes of an auxiliary carrier, forming a pair of uplink and downlink subframes of the main and auxiliary carriers, searching the configuration of the reference uplink and downlink subframes corresponding to the pair of uplink and downlink subframes of the main and auxiliary carriers currently formed in the preset corresponding relation between the pair of uplink and downlink subframes of the main and auxiliary carriers and the configuration of the reference uplink and downlink subframes, and taking the searched configuration of the reference uplink and downlink subframes as the ratio of A/N reference uplink and downlink subframes of FDD.
A TDD-FDD system combined carrier aggregation response system comprises the any base station and the any terminal.
(III) advantageous effects
The invention has at least the following beneficial effects:
1. when the terminal supports TDD-FDD system combined carrier aggregation, the invention utilizes the TDD uplink and downlink subframe ratio to determine the A/N reference uplink and downlink subframe ratio of FDD, namely the subframe is divided into an uplink subframe and a downlink subframe aiming at FDD, the TDD data and the FDD data are respectively transmitted in the respective uplink subframe according to the respective uplink and downlink subframe ratio, and the downlink data is respectively received in the respective downlink subframe, thereby realizing the feedback of ACK/NACK when the terminal supports TDD-FDD system combined carrier aggregation.
2. In the invention, the A/N reference uplink and downlink subframe ratio of FDD can be directly set to be the same as the uplink and downlink subframe ratio of currently used TDD according to the same uplink and downlink configuration of the main and auxiliary cells specified in the Rel-10 protocol, and the implementation mode of the method is simple.
3. In the invention, according to the auxiliary cell reference configuration specified in the Rel-11 protocol, the uplink and downlink subframe ratio of the currently used TDD is used as the uplink and downlink configuration of the main carrier, the virtual uplink and downlink subframe ratio of the FDD selected according to the service characteristics is used as the uplink and downlink configuration of the auxiliary carrier to form the uplink and downlink configuration pair of the main carrier and the auxiliary carrier, and the reference uplink and downlink configuration corresponding to the uplink and downlink configuration pair of the main carrier and the auxiliary carrier is searched and used as the A/N reference uplink and downlink subframe ratio of the FDD. The method can reuse the existing ACK/NACK feedback scheme, has less standardization work, and can correspondingly select and configure the FDD downlink frequency spectrum according to the service.
Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an acknowledgement method for TDD-FDD system joint carrier aggregation according to embodiment 1 of the present invention.
Fig. 2 is a flowchart of an acknowledgement method for TDD-FDD system joint carrier aggregation according to embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of the uplink and downlink subframe allocation of TDD and FDD in embodiment 2 of the present invention.
Fig. 4 is a flowchart of an acknowledgement method for TDD-FDD system joint carrier aggregation according to embodiment 3 of the present invention.
Fig. 5 is a representation of the reference configuration of the secondary cell in embodiment 3 of the present invention.
Fig. 6 is a schematic diagram of the uplink and downlink subframe allocation of TDD and FDD in embodiment 3 of the present invention.
Fig. 7 is a schematic structural diagram of a base station proposed in embodiment 4 of the present invention.
Fig. 8 is a schematic structural diagram of a terminal proposed in embodiment 5 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment provides a response method for carrier aggregation combining in a TDD-FDD system. Referring to fig. 1, the method comprises the steps of:
step 101: and determining the A/N reference uplink and downlink subframe ratio of the FDD by using the uplink and downlink subframe ratio of the TDD.
Step 102: sending/receiving ACK/NACK response of TDD downlink data in each uplink subframe specified by the proportion of the TDD uplink and downlink subframes according to the proportion of the TDD uplink and downlink subframes; sending/receiving an ACK/NACK response of FDD downlink data according to the A/N reference uplink and downlink subframe ratio of FDD in each uplink subframe specified by the A/N reference uplink and downlink subframe ratio of FDD; the A/N response bit information of the TDD and FDD downlink data is carried on the control channel of TDD.
Step 103: sending/receiving TDD downlink data according to the uplink and downlink subframe ratio of TDD in each downlink subframe specified by the uplink and downlink subframe ratio of TDD; and transmitting/receiving FDD downlink data according to the A/N reference uplink and downlink subframe ratio of the FDD in each downlink subframe specified by the A/N reference uplink and downlink subframe ratio of the FDD.
The method for responding to TDD-FDD system combined carrier aggregation shown in fig. 1 may be applied to a terminal, where in step 102, an ACK/NACK response of TDD downlink data and an ACK/NACK response of FDD downlink data are sent in each uplink subframe specified by TDD and FDD, respectively; in step 103, TDD downlink data and FDD downlink data are received for each downlink subframe defined by TDD and FDD, respectively.
Certainly, the above-mentioned TDD-FDD system joint carrier aggregation response method shown in fig. 1 may also be applied to a base station, and in this case, in step 102, the ACK/NACK response of TDD downlink data and the ACK/NACK response of FDD downlink data are respectively received in each uplink subframe specified by TDD and FDD; in step 103, TDD and FDD are defined for each downlink subframe, and TDD downlink data and FDD downlink data are transmitted separately. Certainly, the base station and the terminal may also cooperate to complete the response procedure of the TDD-FDD system joint carrier aggregation by using the above methods, respectively.
In fig. 1, it is necessary to ensure the ACK/NACK transmission and reception of the FDD downlink data by using the a/N reference subframe ratio of FDD. The implementation method for determining the ratio of the a/N reference uplink and downlink subframes of FDD in step 101 is various, and two preferred implementation methods are listed below:
in the first mode, the uplink and downlink subframe ratio of TDD is directly adopted.
In the first mode, the ratio of the A/N reference uplink and downlink subframes of the FDD is set to be the same as the ratio of the uplink and downlink subframes of the currently used TDD.
And secondly, determining the ratio of the virtual uplink and downlink subframes of the FDD according to the service requirement of the FDD, and determining the ratio of the A/N reference uplink and downlink subframes of the FDD according to the ratio of the virtual uplink and downlink subframes and the ratio of the TDD uplink and downlink subframes.
In order to more clearly embody the implementation process of the embodiment of the present invention, the following two modes are respectively described by referring to specific embodiments.
Example 2:
in this embodiment 2, for the first way of determining the a/N reference uplink/downlink subframe ratio of FDD, taking the processing at the terminal side as an example, a response implementation process of the TDD-FDD system joint carrier aggregation is described. Referring to fig. 2, the process specifically includes:
step 201: the A/N reference uplink and downlink subframe ratio of FDD is set to be the same as the uplink and downlink subframe ratio of currently used TDD in advance.
Referring to fig. 3, taking TDD uplink and downlink subframe ratio 0 as an example, in a radio frame, subframes 0, 1, 5, and 6 are downlink subframes, subframes 2 to 4 and subframes 7 to 9 are uplink subframes, and uplink subframes of feedback ACK/NACK response messages corresponding to subframes 0, 1, and 5 are subframes 4, 7, and 9 in the frame, respectively; and the uplink subframe corresponding to the subframe 6 and feeding back the ACK/NACK response is a subframe 2 in the next frame.
Referring to fig. 3, in this step, the allocation ratio of the a/N reference uplink/downlink subframe of FDD may be set to be the same as the allocation ratio 0 of the uplink/downlink subframe of TDD, and the subframe relationship between the uplink/downlink subframe division and the feedback ACK/NACK response is the same as the allocation ratio 0 of the uplink/downlink subframe.
The processing of step 201 may be processing performed at the base station side, and the processing is notified to the terminal through RRC high layer signaling.
Step 202: and the terminal acquires the A/N reference uplink and downlink subframe ratio of the FDD through RRC high-level signaling.
Step 203: the terminal sends/receives an ACK/NACK response of TDD downlink data in each uplink subframe specified by the proportion of the TDD uplink and downlink subframes according to the proportion of the TDD uplink and downlink subframes; the ACK/NACK response bit information of the TDD downlink data is carried on a control channel of the TDD.
Step 204: the terminal sends/receives an ACK/NACK response of FDD downlink data in each uplink subframe specified by the A/N reference uplink and downlink subframe ratio of FDD according to the A/N reference uplink and downlink subframe ratio of FDD; the ACK/NACK response bit information of the FDD downlink data is carried on a control channel of the TDD.
It can be seen that the a/N acknowledgement bit information of the TDD and FDD downlink data is carried on the control channel of TDD.
Step 205: and the terminal receives TDD downlink data in each downlink subframe specified by the TDD uplink and downlink subframe ratio.
Step 206: and the terminal receives the FDD downlink data in each downlink subframe specified by the FDD uplink and downlink subframe ratio.
The steps 203 to 206 are just split for convenience of description, and there is no fixed sequence among the steps, and only the uplink and downlink transceiving is performed according to the timing relationship specified by the uplink and downlink subframe ratio.
The flow shown in fig. 2 is described by taking the process of the terminal as an example.
For the base station side, the processing mode corresponds to the flow shown in fig. 2, and only adaptive modification is needed. For example, in step 202, the base station sends the a/N reference uplink and downlink subframe ratio of FDD to the terminal through RRC high layer signaling. In step 203 and step 204, the base station receives an ACK/NACK response of TDD downlink data and an ACK/NACK response of FDD downlink data in each uplink subframe specified by the TDD and FDD uplink and downlink subframes respectively. In step 205 and step 206, the base station sends TDD downlink data and FDD downlink data in each downlink subframe specified by the TDD and FDD uplink and downlink subframe ratio, respectively.
Example 3:
this embodiment 3 illustrates an acknowledgement implementation process of TDD-FDD system joint carrier aggregation by taking terminal-side processing as an example, for the above-mentioned second method for determining an a/N reference uplink/downlink subframe ratio of FDD. Referring to fig. 4, the process specifically includes:
step 401: and presetting the corresponding relation between the uplink and downlink configuration pairs of the main and auxiliary carriers and the configuration of the reference uplink and downlink subframes.
Here, the SCell reference configuration table as shown in fig. 5 defined in the R-11 protocol version may be directly used as the correspondence in this step, that is, the SCell reference configuration in the rightmost column of fig. 5 may be used as the reference uplink and downlink subframe configuration. Of course, the corresponding relationship in this step may also be reset according to the actual needs of the service.
Step 402: and according to the service requirement of the FDD, selecting one of the multiple uplink and downlink subframe ratios of the TDD as the virtual uplink and downlink subframe ratio of the FDD.
Step 403: and taking the ratio of the uplink and downlink subframes of the currently used TDD as the uplink and downlink configuration of the main carrier, and taking the ratio of the virtual uplink and downlink subframes of the FDD as the uplink and downlink configuration of the auxiliary carrier to form a main and auxiliary carrier uplink and downlink configuration pair.
For the above steps 402 to 403, referring to fig. 6, for example, the uplink and downlink subframe ratio of the currently used TDD is uplink and downlink subframe ratio 0, and if the downlink traffic of the FDD is large, the uplink and downlink subframe ratio 5 with more downlink subframes can be selected from 7 uplink and downlink subframe ratios 0 to 6 of the TDD as the virtual uplink and downlink subframe ratio of the FDD. Therefore, the formed primary and secondary carrier uplink and downlink configuration pair is (0, 5).
Step 404: in the corresponding relationship set in step 401, the reference uplink and downlink subframe configuration corresponding to the currently formed uplink and downlink configuration pair of the primary and secondary carriers is searched.
Step 405: and determining the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD currently used.
As for the above steps 404 to 405, still referring to fig. 6, the formed primary and secondary carrier uplink and downlink configuration pair is (0, 5), and according to the self-scheduling or cross-scheduling, for example, the corresponding set number is set2, the uplink and downlink subframe ratio 5 of TDD corresponding to the primary and secondary carrier uplink and downlink configuration pair (0, 5) is found in the table shown in fig. 5, so the uplink and downlink subframe ratio 5 can be determined as the a/N reference uplink and downlink subframe ratio of FDD.
Step 406: and the terminal acquires the A/N reference uplink and downlink subframe ratio of the FDD through RRC high-level signaling.
Step 407: the terminal sends ACK/NACK response of TDD downlink data in each uplink subframe specified by the TDD uplink and downlink subframe ratio; sending ACK/NACK response of FDD downlink data in each uplink subframe specified by the A/N reference uplink and downlink subframe ratio of FDD; the ACK/NACK response bit information of the TDD and FDD downlink data is carried on the control channel of TDD.
Step 408: the terminal receives TDD downlink data in each downlink subframe specified by the TDD uplink and downlink subframe ratio; and receiving FDD downlink data in each downlink subframe specified by the A/N reference uplink and downlink subframe ratio of the FDD.
The flow shown in fig. 4 is described by taking the process of the terminal as an example.
For the base station side, the processing mode corresponds to the flow shown in fig. 4, and only adaptive modification is needed. For example, in step 406, the base station notifies the terminal of the a/N reference uplink/downlink subframe ratio of FDD through RRC high layer signaling. In step 407, the base station receives an ACK/NACK response of TDD downlink data and an ACK/NACK response of FDD downlink data, respectively, in each uplink subframe specified by the TDD uplink-downlink subframe ratio and the FDD a/N reference uplink-downlink subframe ratio. In step 408, the base station sends TDD downlink data and FDD downlink data in each downlink subframe specified by the TDD uplink/downlink subframe ratio and the FDD a/N reference uplink/downlink subframe ratio, respectively.
Example 4:
the present embodiment proposes a base station, referring to fig. 7, including:
an FDD subframe ratio determining unit 701, configured to determine an a/N reference uplink and downlink subframe ratio of FDD by using an uplink and downlink subframe ratio of TDD;
an uplink transceiving processing unit 702, configured to receive an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes in each uplink subframe specified by the ratio of the TDD uplink and downlink subframes, and receive an a/N response of the FDD downlink data according to a ratio of an FDD reference uplink and downlink subframe determined by the FDD subframe ratio determining unit 701; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
a downlink transceiving processing unit 703 is configured to send TDD downlink data according to the ratio of the TDD uplink and downlink subframes in each specified downlink subframe in the ratio of the TDD uplink and downlink subframes, and send FDD downlink data according to the ratio of the FDD a/N reference uplink and downlink subframes determined by the FDD subframe ratio determining unit 701.
One implementation of the above base station includes:
the FDD subframe allocation determining unit 701 includes a first FDD configuration subunit, configured to set an a/N reference uplink and downlink subframe allocation of FDD to be the same as an uplink and downlink subframe allocation of a currently used TDD.
Another implementation of the foregoing base station includes:
the base station further comprises: a configuration unit, configured to set a corresponding relationship between a primary and secondary carrier uplink and downlink configuration pair and a reference uplink and downlink subframe configuration;
the FDD subframe allocation determining unit 701 includes a second FDD configuration subunit, configured to select one of multiple uplink and downlink subframe allocations of TDD as a virtual uplink and downlink subframe allocation of FDD; and taking the currently used uplink and downlink subframe ratio of the TDD as the uplink and downlink configuration of the main carrier, taking the virtual uplink and downlink subframe ratio of the FDD as the uplink and downlink configuration of the auxiliary carrier, forming a main and auxiliary carrier uplink and downlink configuration pair, searching the reference uplink and downlink subframe configuration corresponding to the currently formed main and auxiliary carrier uplink and downlink configuration pair in the corresponding relationship set by the configuration unit, and taking the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD.
Preferably, the base station may further include: and the informing unit informs the terminal of the A/N reference uplink and downlink subframe ratio of the FDD through RRC high-level signaling.
Example 5:
the present embodiment proposes a terminal, referring to fig. 8, including:
an FDD subframe ratio obtaining unit 801, configured to obtain an a/N reference uplink and downlink subframe ratio of FDD, and transmit the obtained ratio to an uplink interaction unit 802 and a downlink interaction unit 803;
an uplink interaction unit 802, configured to send an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes to each specified uplink subframe, and send an a/N response of FDD downlink data according to a ratio of the FDD uplink and downlink subframes to each specified uplink subframe; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
a downlink interacting unit 803, configured to receive TDD downlink data according to the ratio of the TDD uplink and downlink subframes in each specified downlink subframe in the ratio of the TDD uplink and downlink subframes, and receive FDD downlink data according to the ratio of the FDD a/N reference uplink and downlink subframes in each specified downlink subframe in the ratio of the FDD a/N reference uplink and downlink subframes.
Preferably, the FDD subframe ratio obtaining unit 801 includes a signal processing subunit, configured to receive an RRC high-level signaling, and analyze an a/N reference uplink and downlink subframe ratio of FDD from the high-level signaling.
In a preferred implementation manner, the method for determining the allocation of the a/N reference uplink and downlink subframes of the FDD acquired by the FDD subframe allocation acquisition unit 801 is as follows: and setting the A/N reference uplink and downlink subframe ratio of the FDD to be the same as the uplink and downlink subframe ratio of the currently used TDD.
In another preferred implementation manner, the method for determining the allocation of the a/N reference uplink and downlink subframes of the FDD acquired by the FDD subframe allocation acquisition unit 801 is as follows: selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD; the method comprises the steps of taking the ratio of uplink and downlink subframes of TDD currently used as the ratio of uplink and downlink of a main carrier, taking the ratio of virtual uplink and downlink subframes of FDD as the ratio of uplink and downlink subframes of an auxiliary carrier, forming a pair of uplink and downlink subframes of the main and auxiliary carriers, searching the configuration of the reference uplink and downlink subframes corresponding to the pair of uplink and downlink subframes of the main and auxiliary carriers currently formed in the preset corresponding relation between the pair of uplink and downlink subframes of the main and auxiliary carriers and the configuration of the reference uplink and downlink subframes, and taking the searched configuration of the reference uplink and downlink subframes as the ratio of A/N reference uplink and downlink subframes of FDD.
Example 6:
this embodiment provides an acknowledgement system for TDD-FDD system joint carrier aggregation, including any one of the base stations in embodiment 4 and any one of the terminals in embodiment 5.
Because the above-mentioned information interaction and execution process between the units and sub-units in the device are based on the same concept as the method embodiment of the present invention, the specific content can refer to the description in the method embodiment of the present invention, and is not described herein again.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An acknowledgement method for TDD-FDD system combined carrier aggregation is characterized in that,
determining the A/N reference uplink and downlink subframe ratio of FDD by using the uplink and downlink subframe ratio of TDD, the method also comprises:
sending/receiving an A/N response of TDD downlink data according to the uplink and downlink subframe ratio of TDD in each uplink subframe specified by the uplink and downlink subframe ratio of TDD;
sending/receiving an A/N response of FDD downlink data according to the A/N reference uplink and downlink subframe ratio of FDD in each uplink subframe specified by the A/N reference uplink and downlink subframe ratio of FDD;
the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
the determining of the A/N reference uplink and downlink subframe ratio of the FDD by using the uplink and downlink subframe ratio of the TDD comprises the following steps: setting the A/N reference uplink and downlink subframe ratio of FDD to be the same as the uplink and downlink subframe ratio of currently used TDD; or,
the method still further comprises: presetting a corresponding relation between a main and auxiliary carrier uplink and downlink configuration pair and a reference uplink and downlink subframe configuration; correspondingly, the determining the a/N reference uplink and downlink subframe ratio of FDD by using the uplink and downlink subframe ratio of TDD includes:
selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD according to the service requirement of FDD; and taking the currently used uplink and downlink subframe ratio of the TDD as the uplink and downlink configuration of the main carrier, taking the virtual uplink and downlink subframe ratio of the FDD as the uplink and downlink configuration of the auxiliary carrier to form a main and auxiliary carrier uplink and downlink configuration pair, searching the reference uplink and downlink subframe configuration corresponding to the currently formed main and auxiliary carrier uplink and downlink configuration pair in the corresponding relation, and taking the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD.
2. The method of claim 1, further comprising:
sending/receiving TDD downlink data according to the uplink and downlink subframe ratio of TDD in each downlink subframe specified by the uplink and downlink subframe ratio of TDD; and transmitting/receiving FDD downlink data according to the A/N reference uplink and downlink subframe ratio of the FDD in each downlink subframe specified by the A/N reference uplink and downlink subframe ratio of the FDD.
3. The method of claim 2,
when the terminal executes the response method of the TDD-FDD system combined carrier aggregation, the terminal executes the A/N response of sending TDD downlink data and the A/N response of FDD downlink data in each uplink subframe, and the terminal executes the receiving of the TDD downlink data and the FDD downlink data in each downlink subframe;
when the base station executes the response method of the TDD-FDD system combined carrier aggregation, the base station executes the A/N response for receiving TDD downlink data and the A/N response for FDD downlink data in each uplink subframe, and the base station executes the sending of the TDD downlink data and the FDD downlink data in each downlink subframe.
4. The method according to any of claims 1 to 3, wherein the terminal is informed of the A/N reference uplink/downlink subframe ratio of FDD through RRC signaling.
5. A base station, comprising:
an FDD subframe ratio determining unit, configured to determine an A/N reference uplink and downlink subframe ratio of FDD by using an uplink and downlink subframe ratio of TDD;
an uplink transceiving processing unit, configured to receive an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes in each specified uplink subframe in the ratio of the TDD uplink and downlink subframes, and receive an a/N response of the FDD downlink data according to a ratio of the FDD uplink and downlink subframes determined by the FDD subframe ratio determining unit; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
a downlink transceiving processing unit, configured to send TDD downlink data in each downlink subframe specified by the TDD uplink/downlink subframe ratio, and send FDD downlink data according to each downlink subframe specified by the FDD a/N reference uplink/downlink subframe ratio determined by the FDD subframe ratio determining unit;
wherein, the FDD subframe ratio determining unit comprises: a first FDD configuration subunit, configured to set an a/N reference uplink/downlink subframe ratio of FDD to be the same as an uplink/downlink subframe ratio of a currently used TDD; or,
the base station further comprises: a configuration unit, configured to set a corresponding relationship between a primary and secondary carrier uplink and downlink configuration pair and a reference uplink and downlink subframe configuration; correspondingly, the FDD subframe matching determination unit includes: a second FDD configuration subunit for
Selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD according to the service requirement of FDD; and taking the currently used uplink and downlink subframe ratio of the TDD as the uplink and downlink configuration of the main carrier, taking the virtual uplink and downlink subframe ratio of the FDD as the uplink and downlink configuration of the auxiliary carrier, forming a main and auxiliary carrier uplink and downlink configuration pair, searching the reference uplink and downlink subframe configuration corresponding to the currently formed main and auxiliary carrier uplink and downlink configuration pair in the corresponding relationship set by the configuration unit, and taking the searched reference uplink and downlink subframe configuration as the A/N reference uplink and downlink subframe ratio of the FDD.
6. The base station of claim 5, further comprising: and the informing unit informs the terminal of the A/N reference uplink and downlink subframe ratio of the FDD through RRC high-level signaling.
7. A terminal, comprising:
an FDD subframe ratio obtaining unit, configured to obtain an A/N reference uplink and downlink subframe ratio of FDD, and transmit the A/N reference uplink and downlink subframe ratio to an uplink interaction unit and a downlink interaction unit;
an uplink interaction unit, configured to send an a/N response of TDD downlink data according to a ratio of the TDD uplink and downlink subframes to each specified uplink subframe, and send an a/N response of FDD downlink data according to a ratio of the FDD uplink and downlink subframes to each specified uplink subframe; the A/N response bit information of the TDD and FDD downlink data is carried on a control channel of the TDD;
a downlink interaction unit, configured to receive TDD downlink data according to a ratio of the TDD uplink and downlink subframes to each specified downlink subframe, and receive FDD downlink data according to a ratio of the FDD a/N reference uplink and downlink subframes to each specified downlink subframe;
the method for determining the A/N reference uplink and downlink subframe ratio of the FDD, which is obtained by the FDD subframe ratio obtaining unit, comprises the following steps: setting the A/N reference uplink and downlink subframe ratio of FDD to be the same as the uplink and downlink subframe ratio of currently used TDD; or,
the method for determining the A/N reference uplink and downlink subframe ratio of the FDD obtained by the FDD subframe ratio obtaining unit comprises the following steps: selecting one of multiple uplink and downlink subframe ratios of TDD as a virtual uplink and downlink subframe ratio of FDD according to the service requirement of FDD; the method comprises the steps of taking the ratio of uplink and downlink subframes of TDD currently used as the ratio of uplink and downlink of a main carrier, taking the ratio of virtual uplink and downlink subframes of FDD as the ratio of uplink and downlink subframes of an auxiliary carrier, forming a pair of uplink and downlink subframes of the main and auxiliary carriers, searching the configuration of the reference uplink and downlink subframes corresponding to the pair of uplink and downlink subframes of the main and auxiliary carriers currently formed in the preset corresponding relation between the pair of uplink and downlink subframes of the main and auxiliary carriers and the configuration of the reference uplink and downlink subframes, and taking the searched configuration of the reference uplink and downlink subframes as the ratio of A/N reference uplink and downlink subframes of FDD.
8. The terminal of claim 7, wherein the FDD subframe proportioning obtaining unit includes a signal processing subunit, configured to receive an RRC high-level signaling, and parse an a/N reference uplink and downlink subframe proportioning of FDD from the high-level signaling.
9. An acknowledgement system for TDD-FDD system joint carrier aggregation, comprising a base station according to any of claims 5 to 6 and a terminal according to any of claims 7 to 8.
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